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[PATCH for-next 5/6] xen: Add files needed for minimal riscv build

Add the minimum code required to get xen to build with XEN_TARGET_ARCH=riscv64. It is minimal in the sense that every file and function added is required for a successful build, given the .config generated from riscv64_defconfig. The function implementations are just stubs; actual implmentations will need to be added later. Signed-off-by: Connor Davis <connojdavis@xxxxxxxxx> --- config/riscv64.mk | 7 + xen/Makefile | 8 +- xen/arch/riscv/Kconfig | 54 ++++ xen/arch/riscv/Kconfig.debug | 0 xen/arch/riscv/Makefile | 57 ++++ xen/arch/riscv/README.source | 19 ++ xen/arch/riscv/Rules.mk | 13 + xen/arch/riscv/arch.mk | 7 + xen/arch/riscv/configs/riscv64_defconfig | 12 + xen/arch/riscv/delay.c | 16 + xen/arch/riscv/domain.c | 144 +++++++++ xen/arch/riscv/domctl.c | 36 +++ xen/arch/riscv/guestcopy.c | 57 ++++ xen/arch/riscv/head.S | 6 + xen/arch/riscv/irq.c | 78 +++++ xen/arch/riscv/lib/Makefile | 1 + xen/arch/riscv/lib/find_next_bit.c | 284 +++++++++++++++++ xen/arch/riscv/mm.c | 93 ++++++ xen/arch/riscv/p2m.c | 150 +++++++++ xen/arch/riscv/percpu.c | 17 + xen/arch/riscv/platforms/Kconfig | 31 ++ xen/arch/riscv/riscv64/asm-offsets.c | 31 ++ xen/arch/riscv/setup.c | 27 ++ xen/arch/riscv/shutdown.c | 28 ++ xen/arch/riscv/smp.c | 35 +++ xen/arch/riscv/smpboot.c | 34 ++ xen/arch/riscv/sysctl.c | 33 ++ xen/arch/riscv/time.c | 35 +++ xen/arch/riscv/traps.c | 35 +++ xen/arch/riscv/vm_event.c | 39 +++ xen/arch/riscv/xen.lds.S | 113 +++++++ xen/drivers/char/serial.c | 1 + xen/include/asm-riscv/altp2m.h | 39 +++ xen/include/asm-riscv/asm.h | 77 +++++ xen/include/asm-riscv/asm_defns.h | 24 ++ xen/include/asm-riscv/atomic.h | 204 ++++++++++++ xen/include/asm-riscv/bitops.h | 331 ++++++++++++++++++++ xen/include/asm-riscv/bug.h | 54 ++++ xen/include/asm-riscv/byteorder.h | 16 + xen/include/asm-riscv/cache.h | 24 ++ xen/include/asm-riscv/cmpxchg.h | 382 +++++++++++++++++++++++ xen/include/asm-riscv/compiler_types.h | 32 ++ xen/include/asm-riscv/config.h | 110 +++++++ xen/include/asm-riscv/cpufeature.h | 17 + xen/include/asm-riscv/csr.h | 219 +++++++++++++ xen/include/asm-riscv/current.h | 47 +++ xen/include/asm-riscv/debugger.h | 15 + xen/include/asm-riscv/delay.h | 15 + xen/include/asm-riscv/desc.h | 12 + xen/include/asm-riscv/device.h | 15 + xen/include/asm-riscv/div64.h | 23 ++ xen/include/asm-riscv/domain.h | 50 +++ xen/include/asm-riscv/event.h | 42 +++ xen/include/asm-riscv/fence.h | 12 + xen/include/asm-riscv/flushtlb.h | 34 ++ xen/include/asm-riscv/grant_table.h | 12 + xen/include/asm-riscv/guest_access.h | 41 +++ xen/include/asm-riscv/guest_atomics.h | 60 ++++ xen/include/asm-riscv/hardirq.h | 27 ++ xen/include/asm-riscv/hypercall.h | 12 + xen/include/asm-riscv/init.h | 42 +++ xen/include/asm-riscv/io.h | 283 +++++++++++++++++ xen/include/asm-riscv/iocap.h | 13 + xen/include/asm-riscv/iommu.h | 46 +++ xen/include/asm-riscv/irq.h | 58 ++++ xen/include/asm-riscv/mem_access.h | 4 + xen/include/asm-riscv/mm.h | 246 +++++++++++++++ xen/include/asm-riscv/monitor.h | 65 ++++ xen/include/asm-riscv/nospec.h | 25 ++ xen/include/asm-riscv/numa.h | 41 +++ xen/include/asm-riscv/p2m.h | 218 +++++++++++++ xen/include/asm-riscv/page-bits.h | 11 + xen/include/asm-riscv/page.h | 73 +++++ xen/include/asm-riscv/paging.h | 15 + xen/include/asm-riscv/pci.h | 31 ++ xen/include/asm-riscv/percpu.h | 33 ++ xen/include/asm-riscv/processor.h | 59 ++++ xen/include/asm-riscv/random.h | 9 + xen/include/asm-riscv/regs.h | 23 ++ xen/include/asm-riscv/setup.h | 14 + xen/include/asm-riscv/smp.h | 46 +++ xen/include/asm-riscv/softirq.h | 16 + xen/include/asm-riscv/spinlock.h | 12 + xen/include/asm-riscv/string.h | 28 ++ xen/include/asm-riscv/sysregs.h | 16 + xen/include/asm-riscv/system.h | 99 ++++++ xen/include/asm-riscv/time.h | 31 ++ xen/include/asm-riscv/trace.h | 12 + xen/include/asm-riscv/types.h | 60 ++++ xen/include/asm-riscv/vm_event.h | 55 ++++ xen/include/asm-riscv/xenoprof.h | 12 + xen/include/public/arch-riscv.h | 183 +++++++++++ xen/include/public/arch-riscv/hvm/save.h | 39 +++ xen/include/public/hvm/save.h | 2 + xen/include/public/pmu.h | 2 + xen/include/public/xen.h | 2 + xen/include/xen/domain.h | 1 + 97 files changed, 5370 insertions(+), 2 deletions(-) create mode 100644 config/riscv64.mk create mode 100644 xen/arch/riscv/Kconfig create mode 100644 xen/arch/riscv/Kconfig.debug create mode 100644 xen/arch/riscv/Makefile create mode 100644 xen/arch/riscv/README.source create mode 100644 xen/arch/riscv/Rules.mk create mode 100644 xen/arch/riscv/arch.mk create mode 100644 xen/arch/riscv/configs/riscv64_defconfig create mode 100644 xen/arch/riscv/delay.c create mode 100644 xen/arch/riscv/domain.c create mode 100644 xen/arch/riscv/domctl.c create mode 100644 xen/arch/riscv/guestcopy.c create mode 100644 xen/arch/riscv/head.S create mode 100644 xen/arch/riscv/irq.c create mode 100644 xen/arch/riscv/lib/Makefile create mode 100644 xen/arch/riscv/lib/find_next_bit.c create mode 100644 xen/arch/riscv/mm.c create mode 100644 xen/arch/riscv/p2m.c create mode 100644 xen/arch/riscv/percpu.c create mode 100644 xen/arch/riscv/platforms/Kconfig create mode 100644 xen/arch/riscv/riscv64/asm-offsets.c create mode 100644 xen/arch/riscv/setup.c create mode 100644 xen/arch/riscv/shutdown.c create mode 100644 xen/arch/riscv/smp.c create mode 100644 xen/arch/riscv/smpboot.c create mode 100644 xen/arch/riscv/sysctl.c create mode 100644 xen/arch/riscv/time.c create mode 100644 xen/arch/riscv/traps.c create mode 100644 xen/arch/riscv/vm_event.c create mode 100644 xen/arch/riscv/xen.lds.S create mode 100644 xen/include/asm-riscv/altp2m.h create mode 100644 xen/include/asm-riscv/asm.h create mode 100644 xen/include/asm-riscv/asm_defns.h create mode 100644 xen/include/asm-riscv/atomic.h create mode 100644 xen/include/asm-riscv/bitops.h create mode 100644 xen/include/asm-riscv/bug.h create mode 100644 xen/include/asm-riscv/byteorder.h create mode 100644 xen/include/asm-riscv/cache.h create mode 100644 xen/include/asm-riscv/cmpxchg.h create mode 100644 xen/include/asm-riscv/compiler_types.h create mode 100644 xen/include/asm-riscv/config.h create mode 100644 xen/include/asm-riscv/cpufeature.h create mode 100644 xen/include/asm-riscv/csr.h create mode 100644 xen/include/asm-riscv/current.h create mode 100644 xen/include/asm-riscv/debugger.h create mode 100644 xen/include/asm-riscv/delay.h create mode 100644 xen/include/asm-riscv/desc.h create mode 100644 xen/include/asm-riscv/device.h create mode 100644 xen/include/asm-riscv/div64.h create mode 100644 xen/include/asm-riscv/domain.h create mode 100644 xen/include/asm-riscv/event.h create mode 100644 xen/include/asm-riscv/fence.h create mode 100644 xen/include/asm-riscv/flushtlb.h create mode 100644 xen/include/asm-riscv/grant_table.h create mode 100644 xen/include/asm-riscv/guest_access.h create mode 100644 xen/include/asm-riscv/guest_atomics.h create mode 100644 xen/include/asm-riscv/hardirq.h create mode 100644 xen/include/asm-riscv/hypercall.h create mode 100644 xen/include/asm-riscv/init.h create mode 100644 xen/include/asm-riscv/io.h create mode 100644 xen/include/asm-riscv/iocap.h create mode 100644 xen/include/asm-riscv/iommu.h create mode 100644 xen/include/asm-riscv/irq.h create mode 100644 xen/include/asm-riscv/mem_access.h create mode 100644 xen/include/asm-riscv/mm.h create mode 100644 xen/include/asm-riscv/monitor.h create mode 100644 xen/include/asm-riscv/nospec.h create mode 100644 xen/include/asm-riscv/numa.h create mode 100644 xen/include/asm-riscv/p2m.h create mode 100644 xen/include/asm-riscv/page-bits.h create mode 100644 xen/include/asm-riscv/page.h create mode 100644 xen/include/asm-riscv/paging.h create mode 100644 xen/include/asm-riscv/pci.h create mode 100644 xen/include/asm-riscv/percpu.h create mode 100644 xen/include/asm-riscv/processor.h create mode 100644 xen/include/asm-riscv/random.h create mode 100644 xen/include/asm-riscv/regs.h create mode 100644 xen/include/asm-riscv/setup.h create mode 100644 xen/include/asm-riscv/smp.h create mode 100644 xen/include/asm-riscv/softirq.h create mode 100644 xen/include/asm-riscv/spinlock.h create mode 100644 xen/include/asm-riscv/string.h create mode 100644 xen/include/asm-riscv/sysregs.h create mode 100644 xen/include/asm-riscv/system.h create mode 100644 xen/include/asm-riscv/time.h create mode 100644 xen/include/asm-riscv/trace.h create mode 100644 xen/include/asm-riscv/types.h create mode 100644 xen/include/asm-riscv/vm_event.h create mode 100644 xen/include/asm-riscv/xenoprof.h create mode 100644 xen/include/public/arch-riscv.h create mode 100644 xen/include/public/arch-riscv/hvm/save.h diff --git a/config/riscv64.mk b/config/riscv64.mk new file mode 100644 index 0000000000..0ec97838f9 --- /dev/null +++ b/config/riscv64.mk @@ -0,0 +1,7 @@ +CONFIG_RISCV := y +CONFIG_RISCV_64 := y +CONFIG_RISCV_$(XEN_OS) := y + +CONFIG_XEN_INSTALL_SUFFIX := + +CFLAGS += diff --git a/xen/Makefile b/xen/Makefile index 544cc0995d..2381486c1f 100644 --- a/xen/Makefile +++ b/xen/Makefile @@ -26,7 +26,9 @@ MAKEFLAGS += -rR EFI_MOUNTPOINT ?= $(BOOT_DIR)/efi ARCH=$(XEN_TARGET_ARCH) -SRCARCH=$(shell echo $(ARCH) | sed -e 's/x86.*/x86/' -e s'/arm$32\|64$/arm/g') +SRCARCH=$(shell echo $(ARCH) | \ + sed -e 's/x86.*/x86/' -e s'/arm$32\|64$/arm/g' \ + -e s'/riscv.*/riscv/g') # Don't break if the build process wasn't called from the top level # we need XEN_TARGET_ARCH to generate the proper config @@ -35,7 +37,8 @@ include $(XEN_ROOT)/Config.mk # Set ARCH/SUBARCH appropriately. export TARGET_SUBARCH := $(XEN_TARGET_ARCH) export TARGET_ARCH := $(shell echo $(XEN_TARGET_ARCH) | \ - sed -e 's/x86.*/x86/' -e s'/arm$32\|64$/arm/g') + sed -e 's/x86.*/x86/' -e s'/arm$32\|64$/arm/g' \ + -e s'/riscv.*/riscv/g') # Allow someone to change their config file export KCONFIG_CONFIG ?= .config @@ -335,6 +338,7 @@ _clean: delete-unfresh-files $(MAKE) $(clean) xsm $(MAKE) $(clean) crypto $(MAKE) $(clean) arch/arm + $(MAKE) $(clean) arch/riscv $(MAKE) $(clean) arch/x86 $(MAKE) $(clean) test $(MAKE) -f $(BASEDIR)/tools/kconfig/Makefile.kconfig ARCH=$(ARCH) SRCARCH=$(SRCARCH) clean diff --git a/xen/arch/riscv/Kconfig b/xen/arch/riscv/Kconfig new file mode 100644 index 0000000000..1b44564053 --- /dev/null +++ b/xen/arch/riscv/Kconfig @@ -0,0 +1,54 @@ +config 64BIT + bool + +config RISCV_64 + bool + depends on 64BIT + +config RISCV + def_bool y + +config ARCH_DEFCONFIG + string + default "arch/riscv/configs/riscv64_defconfig" if RISCV_64 + +menu "Architecture Features" + +source "arch/Kconfig" + +endmenu + +menu "ISA Selection" + +choice + prompt "Base ISA" + default RISCV_ISA_RV64IMA + help + This selects the base ISA extensions that Xen will target. + +config RISCV_ISA_RV64IMA + bool "RV64IMA" + select 64BIT + select RISCV_64 + help + Use the RV64I base ISA, plus the "M" and "A" extensions + for integer multiply/divide and atomic instructions, respectively. + +endchoice + +config RISCV_ISA_C + bool "Compressed extension" + help + Add "C" to the ISA subsets that the toolchain is allowed + to emit when building Xen, which results in compressed + instructions in the Xen binary. + + If unsure, say N. + +endmenu + +source "arch/riscv/platforms/Kconfig" + +source "common/Kconfig" + +source "drivers/Kconfig" diff --git a/xen/arch/riscv/Kconfig.debug b/xen/arch/riscv/Kconfig.debug new file mode 100644 index 0000000000..e69de29bb2 diff --git a/xen/arch/riscv/Makefile b/xen/arch/riscv/Makefile new file mode 100644 index 0000000000..bf67c17d1b --- /dev/null +++ b/xen/arch/riscv/Makefile @@ -0,0 +1,57 @@ +obj-y += lib/ + +obj-y += domain.o +obj-y += domctl.o +obj-y += delay.o +obj-y += guestcopy.o +obj-y += irq.o +obj-y += mm.o +obj-y += p2m.o +obj-y += percpu.o +obj-y += setup.o +obj-y += shutdown.o +obj-y += smp.o +obj-y += smpboot.o +obj-y += sysctl.o +obj-y += time.o +obj-y += traps.o +obj-y += vm_event.o + +ALL_OBJS := head.o $(ALL_OBJS) + +$(TARGET): $(TARGET)-syms + $(OBJCOPY) -O binary -S $< $@ + +prelink.o: $(ALL_OBJS) $(ALL_LIBS) FORCE + $(call if_changed,ld) + +targets += prelink.o + +$(TARGET)-syms: prelink.o xen.lds + $(LD) $(XEN_LDFLAGS) -T xen.lds -N prelink.o \ + $(BASEDIR)/common/symbols-dummy.o -o $(@D)/.$(@F).0 + $(NM) -pa --format=sysv $(@D)/.$(@F).0 \ + | $(BASEDIR)/tools/symbols $(all_symbols) --sysv --sort >$(@D)/.$(@F).0.S + $(MAKE) -f $(BASEDIR)/Rules.mk $(@D)/.$(@F).0.o + $(LD) $(XEN_LDFLAGS) -T xen.lds -N prelink.o \ + $(@D)/.$(@F).0.o -o $(@D)/.$(@F).1 + $(NM) -pa --format=sysv $(@D)/.$(@F).1 \ + | $(BASEDIR)/tools/symbols $(all_symbols) --sysv --sort >$(@D)/.$(@F).1.S + $(MAKE) -f $(BASEDIR)/Rules.mk $(@D)/.$(@F).1.o + $(LD) $(XEN_LDFLAGS) -T xen.lds -N prelink.o $(build_id_linker) \ + $(@D)/.$(@F).1.o -o $@ + $(NM) -pa --format=sysv $(@D)/$(@F) \ + | $(BASEDIR)/tools/symbols --all-symbols --xensyms --sysv --sort \ + >$(@D)/$(@F).map + rm -f $(@D)/.$(@F).[0-9]* + +asm-offsets.s: $(TARGET_SUBARCH)/asm-offsets.c + $(CC) $(filter-out -flto,$(c_flags)) -S -o $@ $< + +xen.lds: xen.lds.S + $(CPP) -P $(a_flags) -MQ $@ -o $@ $< + +.PHONY: clean +clean:: + rm -f asm-offsets.s xen.lds + rm -f $(BASEDIR)/.xen-syms.[0-9]* diff --git a/xen/arch/riscv/README.source b/xen/arch/riscv/README.source new file mode 100644 index 0000000000..a04e06c5f7 --- /dev/null +++ b/xen/arch/riscv/README.source @@ -0,0 +1,19 @@ +External RISCV Sources +====================== +This documents the files copied from other projects for use in the +RISCV code of Xen. + +Linux (commit f40ddce88593, Feb. 14 2021) +========================================= +The following files were copied from arch/riscv/include/asm to +xen/include/asm-riscv: + +asm.h -> asm.h +atomic.h -> atomic.h +bitops.h -> bitops.h +csr.h -> csr.h +{mmio,io}.h -> io.h +fence.h -> fence.h +cmpxchg.h -> cmpxchg.h +compiler_types.h -> compiler_types.h +timex.h -> time.h diff --git a/xen/arch/riscv/Rules.mk b/xen/arch/riscv/Rules.mk new file mode 100644 index 0000000000..3c368fa05d --- /dev/null +++ b/xen/arch/riscv/Rules.mk @@ -0,0 +1,13 @@ +######################################## +# RISCV-specific definitions + +ifeq ($(CONFIG_RISCV_64),y) + c_flags += -mabi=lp64 + a_flags += -mabi=lp64 +endif + +riscv-march-$(CONFIG_RISCV_ISA_RV64IMA) := rv64ima +riscv-march-$(CONFIG_RISCV_ISA_C) := $(riscv-march-y)c + +c_flags += -march=$(riscv-march-y) -mstrict-align -mcmodel=medany +a_flags += -march=$(riscv-march-y) -mstrict-align -mcmodel=medany diff --git a/xen/arch/riscv/arch.mk b/xen/arch/riscv/arch.mk new file mode 100644 index 0000000000..d5d68c9150 --- /dev/null +++ b/xen/arch/riscv/arch.mk @@ -0,0 +1,7 @@ +######################################## +# riscv-specific definitions + +CFLAGS += -I$(BASEDIR)/include + +$(call cc-options-add,CFLAGS,CC,$(EMBEDDED_EXTRA_CFLAGS)) +$(call cc-option-add,CFLAGS,CC,-Wnested-externs) diff --git a/xen/arch/riscv/configs/riscv64_defconfig b/xen/arch/riscv/configs/riscv64_defconfig new file mode 100644 index 0000000000..664a5d2378 --- /dev/null +++ b/xen/arch/riscv/configs/riscv64_defconfig @@ -0,0 +1,12 @@ +# CONFIG_SCHED_CREDIT is not set +# CONFIG_SCHED_RTDS is not set +# CONFIG_SCHED_NULL is not set +# CONFIG_SCHED_ARINC653 is not set +# CONFIG_TRACEBUFFER is not set +# CONFIG_DEBUG is not set +# CONFIG_DEBUG_INFO is not set +# CONFIG_HYPFS is not set +# CONFIG_GRANT_TABLE is not set +# CONFIG_SPECULATIVE_HARDEN_ARRAY is not set + +CONFIG_EXPERT=y diff --git a/xen/arch/riscv/delay.c b/xen/arch/riscv/delay.c new file mode 100644 index 0000000000..403b139b96 --- /dev/null +++ b/xen/arch/riscv/delay.c @@ -0,0 +1,16 @@ +/* + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +void udelay(unsigned long usecs) +{ +} +EXPORT_SYMBOL(udelay); diff --git a/xen/arch/riscv/domain.c b/xen/arch/riscv/domain.c new file mode 100644 index 0000000000..a9fdb1f94f --- /dev/null +++ b/xen/arch/riscv/domain.c @@ -0,0 +1,144 @@ +/* + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <xen/errno.h> +#include <xen/sched.h> +#include <xen/domain.h> +#include <public/domctl.h> +#include <public/xen.h> + +DEFINE_PER_CPU(struct vcpu *, curr_vcpu); + +void context_switch(struct vcpu *prev, struct vcpu *next) +{ +} + +void continue_running(struct vcpu *same) +{ +} + +void sync_local_execstate(void) +{ +} + +void sync_vcpu_execstate(struct vcpu *v) +{ +} + +unsigned long hypercall_create_continuation( + unsigned int op, const char *format, ...) +{ + + return 0; +} + +struct domain *alloc_domain_struct(void) +{ + return 0; +} + +void free_domain_struct(struct domain *d) +{ +} + +void dump_pageframe_info(struct domain *d) +{ +} + +int arch_sanitise_domain_config(struct xen_domctl_createdomain *config) +{ + return -EOPNOTSUPP; +} + + +int arch_domain_create(struct domain *d, + struct xen_domctl_createdomain *config) +{ + return -EOPNOTSUPP; +} + +void arch_domain_destroy(struct domain *d) +{ +} + +void arch_domain_shutdown(struct domain *d) +{ +} + +void arch_domain_pause(struct domain *d) +{ +} + +void arch_domain_unpause(struct domain *d) +{ +} + +int arch_domain_soft_reset(struct domain *d) +{ + return -EOPNOTSUPP; +} + +void arch_domain_creation_finished(struct domain *d) +{ +} + +int domain_relinquish_resources(struct domain *d) +{ + return -EOPNOTSUPP; +} + +void arch_dump_domain_info(struct domain *d) +{ +} + +long arch_do_vcpu_op(int cmd, struct vcpu *v, XEN_GUEST_HANDLE_PARAM(void) arg) +{ + return -EOPNOTSUPP; +} + +void arch_dump_vcpu_info(struct vcpu *v) +{ +} + +int arch_set_info_guest( + struct vcpu *v, vcpu_guest_context_u c) +{ + return -EOPNOTSUPP; +} + +struct vcpu *alloc_vcpu_struct(const struct domain *d) +{ + return 0; +} + +void free_vcpu_struct(struct vcpu *v) +{ +} + +int arch_initialise_vcpu(struct vcpu *v, XEN_GUEST_HANDLE_PARAM(void) arg) +{ + return -EOPNOTSUPP; +} + +int arch_vcpu_reset(struct vcpu *v) +{ + return -EOPNOTSUPP; +} + +int arch_vcpu_create(struct vcpu *v) +{ + return -EOPNOTSUPP; +} + +void arch_vcpu_destroy(struct vcpu *v) +{ +} diff --git a/xen/arch/riscv/domctl.c b/xen/arch/riscv/domctl.c new file mode 100644 index 0000000000..f81a13a9c4 --- /dev/null +++ b/xen/arch/riscv/domctl.c @@ -0,0 +1,36 @@ +/****************************************************************************** + * Arch-specific domctl.c + * + * Copyright (c) 2012, Citrix Systems + */ + +#include <xen/errno.h> +#include <xen/guest_access.h> +#include <xen/hypercall.h> +#include <xen/sched.h> +#include <public/domctl.h> + +void arch_get_domain_info(const struct domain *d, + struct xen_domctl_getdomaininfo *info) +{ +} + +long arch_do_domctl(struct xen_domctl *domctl, struct domain *d, + XEN_GUEST_HANDLE_PARAM(xen_domctl_t) u_domctl) +{ + return -EOPNOTSUPP; +} + +void arch_get_info_guest(struct vcpu *v, vcpu_guest_context_u c) +{ +} + +/* + * Local variables: + * mode: C + * c-file-style: "BSD" + * c-basic-offset: 4 + * tab-width: 4 + * indent-tabs-mode: nil + * End: + */ diff --git a/xen/arch/riscv/guestcopy.c b/xen/arch/riscv/guestcopy.c new file mode 100644 index 0000000000..d8fcf98a0e --- /dev/null +++ b/xen/arch/riscv/guestcopy.c @@ -0,0 +1,57 @@ +/* + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <asm/guest_access.h> + +unsigned long raw_copy_to_guest(void *to, const void *from, unsigned len) +{ + return -EOPNOTSUPP; +} + +unsigned long raw_copy_to_guest_flush_dcache(void *to, const void *from, + unsigned len) +{ + return -EOPNOTSUPP; +} + +unsigned long raw_clear_guest(void *to, unsigned len) +{ + return -EOPNOTSUPP; +} + +unsigned long raw_copy_from_guest(void *to, const void __user *from, unsigned len) +{ + return -EOPNOTSUPP; +} + +unsigned long copy_to_guest_phys_flush_dcache(struct domain *d, + paddr_t gpa, + void *buf, + unsigned int len) +{ + return -EOPNOTSUPP; +} + +int access_guest_memory_by_ipa(struct domain *d, paddr_t gpa, void *buf, + uint32_t size, bool is_write) +{ + return -EOPNOTSUPP; +} + +/* + * Local variables: + * mode: C + * c-file-style: "BSD" + * c-basic-offset: 4 + * indent-tabs-mode: nil + * End: + */ diff --git a/xen/arch/riscv/head.S b/xen/arch/riscv/head.S new file mode 100644 index 0000000000..0dbc27ba75 --- /dev/null +++ b/xen/arch/riscv/head.S @@ -0,0 +1,6 @@ +#include <asm/config.h> + + .text + +ENTRY(start) + j start diff --git a/xen/arch/riscv/irq.c b/xen/arch/riscv/irq.c new file mode 100644 index 0000000000..65137e5f11 --- /dev/null +++ b/xen/arch/riscv/irq.c @@ -0,0 +1,78 @@ +/* + * RISC-V Interrupt support + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <xen/lib.h> +#include <xen/errno.h> +#include <xen/sched.h> + +const unsigned int nr_irqs = NR_IRQS; + +static void ack_none(struct irq_desc *irq) +{ +} + +static void end_none(struct irq_desc *irq) +{ +} + +hw_irq_controller no_irq_type = { + .typename = "none", + .startup = irq_startup_none, + .shutdown = irq_shutdown_none, + .enable = irq_enable_none, + .disable = irq_disable_none, + .ack = ack_none, + .end = end_none +}; + +int arch_init_one_irq_desc(struct irq_desc *desc) +{ + return -EOPNOTSUPP; +} + +struct pirq *alloc_pirq_struct(struct domain *d) +{ + return NULL; +} + +irq_desc_t *__irq_to_desc(int irq) +{ + return NULL; +} + +int pirq_guest_bind(struct vcpu *v, struct pirq *pirq, int will_share) +{ + return -EOPNOTSUPP; +} + +void pirq_guest_unbind(struct domain *d, struct pirq *pirq) +{ +} + +void pirq_set_affinity(struct domain *d, int pirq, const cpumask_t *mask) +{ +} + +void smp_send_state_dump(unsigned int cpu) +{ +} + +void arch_move_irqs(struct vcpu *v) +{ +} + +int setup_irq(unsigned int irq, unsigned int irqflags, struct irqaction *new) +{ + return -EOPNOTSUPP; +} diff --git a/xen/arch/riscv/lib/Makefile b/xen/arch/riscv/lib/Makefile new file mode 100644 index 0000000000..6fae6a1f10 --- /dev/null +++ b/xen/arch/riscv/lib/Makefile @@ -0,0 +1 @@ +obj-y += find_next_bit.o diff --git a/xen/arch/riscv/lib/find_next_bit.c b/xen/arch/riscv/lib/find_next_bit.c new file mode 100644 index 0000000000..adaa25f32b --- /dev/null +++ b/xen/arch/riscv/lib/find_next_bit.c @@ -0,0 +1,284 @@ +/* find_next_bit.c: fallback find next bit implementation + * + * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved. + * Written by David Howells (dhowells@xxxxxxxxxx) + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + */ +#include <xen/bitops.h> +#include <asm/bitops.h> +#include <asm/types.h> +#include <asm/byteorder.h> + +#define BITOP_WORD(nr) ((nr) / BITS_PER_LONG) + +#ifndef find_next_bit +/* + * Find the next set bit in a memory region. + */ +unsigned long find_next_bit(const unsigned long *addr, unsigned long size, + unsigned long offset) +{ + const unsigned long *p = addr + BITOP_WORD(offset); + unsigned long result = offset & ~(BITS_PER_LONG-1); + unsigned long tmp; + + if (offset >= size) + return size; + size -= result; + offset %= BITS_PER_LONG; + if (offset) { + tmp = *(p++); + tmp &= (~0UL << offset); + if (size < BITS_PER_LONG) + goto found_first; + if (tmp) + goto found_middle; + size -= BITS_PER_LONG; + result += BITS_PER_LONG; + } + while (size & ~(BITS_PER_LONG-1)) { + if ((tmp = *(p++))) + goto found_middle; + result += BITS_PER_LONG; + size -= BITS_PER_LONG; + } + if (!size) + return result; + tmp = *p; + +found_first: + tmp &= (~0UL >> (BITS_PER_LONG - size)); + if (tmp == 0UL) /* Are any bits set? */ + return result + size; /* Nope. */ +found_middle: + return result + ffs(tmp); +} +EXPORT_SYMBOL(find_next_bit); +#endif + +#ifndef find_next_zero_bit +/* + * This implementation of find_{first,next}_zero_bit was stolen from + * Linus' asm-alpha/bitops.h. + */ +unsigned long find_next_zero_bit(const unsigned long *addr, unsigned long size, + unsigned long offset) +{ + const unsigned long *p = addr + BITOP_WORD(offset); + unsigned long result = offset & ~(BITS_PER_LONG-1); + unsigned long tmp; + + if (offset >= size) + return size; + size -= result; + offset %= BITS_PER_LONG; + if (offset) { + tmp = *(p++); + tmp |= ~0UL >> (BITS_PER_LONG - offset); + if (size < BITS_PER_LONG) + goto found_first; + if (~tmp) + goto found_middle; + size -= BITS_PER_LONG; + result += BITS_PER_LONG; + } + while (size & ~(BITS_PER_LONG-1)) { + if (~(tmp = *(p++))) + goto found_middle; + result += BITS_PER_LONG; + size -= BITS_PER_LONG; + } + if (!size) + return result; + tmp = *p; + +found_first: + tmp |= ~0UL << size; + if (tmp == ~0UL) /* Are any bits zero? */ + return result + size; /* Nope. */ +found_middle: + return result + ffz(tmp); +} +EXPORT_SYMBOL(find_next_zero_bit); +#endif + +#ifndef find_first_bit +/* + * Find the first set bit in a memory region. + */ +unsigned long find_first_bit(const unsigned long *addr, unsigned long size) +{ + const unsigned long *p = addr; + unsigned long result = 0; + unsigned long tmp; + + while (size & ~(BITS_PER_LONG-1)) { + if ((tmp = *(p++))) + goto found; + result += BITS_PER_LONG; + size -= BITS_PER_LONG; + } + if (!size) + return result; + + tmp = (*p) & (~0UL >> (BITS_PER_LONG - size)); + if (tmp == 0UL) /* Are any bits set? */ + return result + size; /* Nope. */ +found: + return result + ffs(tmp); +} +EXPORT_SYMBOL(find_first_bit); +#endif + +#ifndef find_first_zero_bit +/* + * Find the first cleared bit in a memory region. + */ +unsigned long find_first_zero_bit(const unsigned long *addr, unsigned long size) +{ + const unsigned long *p = addr; + unsigned long result = 0; + unsigned long tmp; + + while (size & ~(BITS_PER_LONG-1)) { + if (~(tmp = *(p++))) + goto found; + result += BITS_PER_LONG; + size -= BITS_PER_LONG; + } + if (!size) + return result; + + tmp = (*p) | (~0UL << size); + if (tmp == ~0UL) /* Are any bits zero? */ + return result + size; /* Nope. */ +found: + return result + ffz(tmp); +} +EXPORT_SYMBOL(find_first_zero_bit); +#endif + +#ifdef __BIG_ENDIAN + +/* include/linux/byteorder does not support "unsigned long" type */ +static inline unsigned long ext2_swabp(const unsigned long * x) +{ +#if BITS_PER_LONG == 64 + return (unsigned long) __swab64p((u64 *) x); +#elif BITS_PER_LONG == 32 + return (unsigned long) __swab32p((u32 *) x); +#else +#error BITS_PER_LONG not defined +#endif +} + +/* include/linux/byteorder doesn't support "unsigned long" type */ +static inline unsigned long ext2_swab(const unsigned long y) +{ +#if BITS_PER_LONG == 64 + return (unsigned long) __swab64((u64) y); +#elif BITS_PER_LONG == 32 + return (unsigned long) __swab32((u32) y); +#else +#error BITS_PER_LONG not defined +#endif +} + +#ifndef find_next_zero_bit_le +unsigned long find_next_zero_bit_le(const void *addr, unsigned + long size, unsigned long offset) +{ + const unsigned long *p = addr; + unsigned long result = offset & ~(BITS_PER_LONG - 1); + unsigned long tmp; + + if (offset >= size) + return size; + p += BITOP_WORD(offset); + size -= result; + offset &= (BITS_PER_LONG - 1UL); + if (offset) { + tmp = ext2_swabp(p++); + tmp |= (~0UL >> (BITS_PER_LONG - offset)); + if (size < BITS_PER_LONG) + goto found_first; + if (~tmp) + goto found_middle; + size -= BITS_PER_LONG; + result += BITS_PER_LONG; + } + + while (size & ~(BITS_PER_LONG - 1)) { + if (~(tmp = *(p++))) + goto found_middle_swap; + result += BITS_PER_LONG; + size -= BITS_PER_LONG; + } + if (!size) + return result; + tmp = ext2_swabp(p); +found_first: + tmp |= ~0UL << size; + if (tmp == ~0UL) /* Are any bits zero? */ + return result + size; /* Nope. Skip ffz */ +found_middle: + return result + ffz(tmp); + +found_middle_swap: + return result + ffz(ext2_swab(tmp)); +} +EXPORT_SYMBOL(find_next_zero_bit_le); +#endif + +#ifndef find_next_bit_le +unsigned long find_next_bit_le(const void *addr, unsigned + long size, unsigned long offset) +{ + const unsigned long *p = addr; + unsigned long result = offset & ~(BITS_PER_LONG - 1); + unsigned long tmp; + + if (offset >= size) + return size; + p += BITOP_WORD(offset); + size -= result; + offset &= (BITS_PER_LONG - 1UL); + if (offset) { + tmp = ext2_swabp(p++); + tmp &= (~0UL << offset); + if (size < BITS_PER_LONG) + goto found_first; + if (tmp) + goto found_middle; + size -= BITS_PER_LONG; + result += BITS_PER_LONG; + } + + while (size & ~(BITS_PER_LONG - 1)) { + tmp = *(p++); + if (tmp) + goto found_middle_swap; + result += BITS_PER_LONG; + size -= BITS_PER_LONG; + } + if (!size) + return result; + tmp = ext2_swabp(p); +found_first: + tmp &= (~0UL >> (BITS_PER_LONG - size)); + if (tmp == 0UL) /* Are any bits set? */ + return result + size; /* Nope. */ +found_middle: + return result + ffs(tmp); + +found_middle_swap: + return result + ffs(ext2_swab(tmp)); +} +EXPORT_SYMBOL(find_next_bit_le); +#endif + +#endif /* __BIG_ENDIAN */ diff --git a/xen/arch/riscv/mm.c b/xen/arch/riscv/mm.c new file mode 100644 index 0000000000..72322b9adc --- /dev/null +++ b/xen/arch/riscv/mm.c @@ -0,0 +1,93 @@ +/* + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <xen/compile.h> +#include <xen/types.h> +#include <xen/init.h> +#include <xen/mm.h> + +unsigned long max_page; +unsigned long total_pages; +unsigned long frametable_base_mfn; + +void flush_page_to_ram(unsigned long mfn, bool sync_icache) +{ +} + +void arch_dump_shared_mem_info(void) +{ +} + +int steal_page(struct domain *d, struct page_info *page, unsigned int memflags) +{ + return 0; +} + +int page_is_ram_type(unsigned long mfn, unsigned long mem_type) +{ + return 0; +} + +unsigned long domain_get_maximum_gpfn(struct domain *d) +{ + return 0; +} + +int xenmem_add_to_physmap_one(struct domain *d, unsigned int space, + union add_to_physmap_extra extra, + unsigned long idx, gfn_t gfn) +{ + return 0; +} + +long arch_memory_op(int op, XEN_GUEST_HANDLE_PARAM(void) arg) +{ + return 0; +} + +struct domain *page_get_owner_and_reference(struct page_info *page) +{ + return (void *) 0xdeadbeef; +} + +void put_page(struct page_info *page) +{ +} + +bool get_page(struct page_info *page, const struct domain *domain) +{ + return false; +} + +int get_page_type(struct page_info *page, unsigned long type) +{ + return 0; +} + +void put_page_type(struct page_info *page) +{ + return; +} + +unsigned long get_upper_mfn_bound(void) +{ + return -1; +} + +/* + * Local variables: + * mode: C + * c-file-style: "BSD" + * c-basic-offset: 4 + * indent-tabs-mode: nil + * End: + */ diff --git a/xen/arch/riscv/p2m.c b/xen/arch/riscv/p2m.c new file mode 100644 index 0000000000..84ae5f8a37 --- /dev/null +++ b/xen/arch/riscv/p2m.c @@ -0,0 +1,150 @@ +/* + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <xen/sched.h> + +#define INVALID_VMID 0 /* VMID 0 is reserved */ + +void p2m_write_unlock(struct p2m_domain *p2m) +{ +} + +void p2m_dump_info(struct domain *d) +{ +} + +void memory_type_changed(struct domain *d) +{ +} + +void dump_p2m_lookup(struct domain *d, paddr_t addr) +{ +} + +void p2m_save_state(struct vcpu *p) +{ +} + +void p2m_restore_state(struct vcpu *n) +{ +} + +mfn_t gfn_to_mfn(struct domain *d, gfn_t gfn) +{ + return _mfn(gfn_x(gfn)); +} + +int p2m_set_entry(struct p2m_domain *p2m, + gfn_t sgfn, + unsigned long nr, + mfn_t smfn, + p2m_type_t t, + p2m_access_t a) +{ + int rc = 0; + + + return rc; +} + +mfn_t p2m_lookup(struct domain *d, gfn_t gfn, p2m_type_t *t) +{ + return _mfn(gfn_x(gfn)); +} + +mfn_t p2m_get_entry(struct p2m_domain *p2m, gfn_t gfn, + p2m_type_t *t, p2m_access_t *a, + unsigned int *page_order, + bool *valid) +{ + return _mfn(gfn_x(gfn)); +} + +void p2m_tlb_flush_sync(struct p2m_domain *p2m) +{ +} + +int map_regions_p2mt(struct domain *d, + gfn_t gfn, + unsigned long nr, + mfn_t mfn, + p2m_type_t p2mt) +{ + return 0; +} + +int unmap_regions_p2mt(struct domain *d, + gfn_t gfn, + unsigned long nr, + mfn_t mfn) +{ + return 0; +} + +int map_mmio_regions(struct domain *d, + gfn_t start_gfn, + unsigned long nr, + mfn_t mfn) +{ + return 0; +} + +int unmap_mmio_regions(struct domain *d, + gfn_t start_gfn, + unsigned long nr, + mfn_t mfn) +{ + return 0; +} + +int map_dev_mmio_region(struct domain *d, + gfn_t gfn, + unsigned long nr, + mfn_t mfn) +{ + return 0; +} + +int guest_physmap_add_entry(struct domain *d, + gfn_t gfn, + mfn_t mfn, + unsigned long page_order, + p2m_type_t t) +{ + return 0; +} + +int guest_physmap_remove_page(struct domain *d, gfn_t gfn, mfn_t mfn, + unsigned int page_order) +{ + return 0; +} + +int set_foreign_p2m_entry(struct domain *d, const struct domain *fd, + unsigned long gfn, mfn_t mfn) +{ + return 0; +} + +struct page_info *p2m_get_page_from_gfn(struct domain *d, gfn_t gfn, + p2m_type_t *t) +{ + return NULL; +} + +void vcpu_mark_events_pending(struct vcpu *v) +{ +} + +void vcpu_update_evtchn_irq(struct vcpu *v) +{ +} diff --git a/xen/arch/riscv/percpu.c b/xen/arch/riscv/percpu.c new file mode 100644 index 0000000000..31c0cce606 --- /dev/null +++ b/xen/arch/riscv/percpu.c @@ -0,0 +1,17 @@ +/* + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <xen/percpu.h> +#include <xen/cpu.h> +#include <xen/init.h> + +unsigned long __per_cpu_offset[NR_CPUS]; diff --git a/xen/arch/riscv/platforms/Kconfig b/xen/arch/riscv/platforms/Kconfig new file mode 100644 index 0000000000..6959ec35a2 --- /dev/null +++ b/xen/arch/riscv/platforms/Kconfig @@ -0,0 +1,31 @@ +choice + prompt "Platform Support" + default ALL_PLAT + ---help--- + Choose which hardware platform to enable in Xen. + + If unsure, choose ALL_PLAT. + +config ALL_PLAT + bool "All Platforms" + ---help--- + Enable support for all available hardware platforms. It doesn't + automatically select any of the related drivers. + +config QEMU + bool "QEMU RISC-V virt machine support" + depends on RISCV + select HAS_NS16550 + ---help--- + Enable all the required drivers for QEMU RISC-V virt emulated + machine. + +endchoice + +config ALL64_PLAT + bool + default (ALL_PLAT && RISCV_64) + +config ALL32_PLAT + bool + default (ALL_PLAT && RISCV_32) diff --git a/xen/arch/riscv/riscv64/asm-offsets.c b/xen/arch/riscv/riscv64/asm-offsets.c new file mode 100644 index 0000000000..994d5f60c9 --- /dev/null +++ b/xen/arch/riscv/riscv64/asm-offsets.c @@ -0,0 +1,31 @@ +/* + * Copyright (C) 2012 Regents of the University of California + * Copyright (C) 2017 SiFive + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation, version 2. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#define COMPILE_OFFSETS + +#include <asm/init.h> + +#define DEFINE(_sym, _val) \ + asm volatile ("\n.ascii\"==>#define " #_sym " %0 /* " #_val " */<==\"" \ + : : "i" (_val) ) +#define BLANK() \ + asm volatile ( "\n.ascii\"==><==\"" : : ) +#define OFFSET(_sym, _str, _mem) \ + DEFINE(_sym, offsetof(_str, _mem)); + +void asm_offsets(void) +{ + BLANK(); + OFFSET(INITINFO_stack, struct init_info, stack); +} diff --git a/xen/arch/riscv/setup.c b/xen/arch/riscv/setup.c new file mode 100644 index 0000000000..129e3db58f --- /dev/null +++ b/xen/arch/riscv/setup.c @@ -0,0 +1,27 @@ +/* + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <xen/types.h> +#include <public/version.h> + +void arch_get_xen_caps(xen_capabilities_info_t *info) +{ +} + +/* + * Local variables: + * mode: C + * c-file-style: "BSD" + * c-basic-offset: 4 + * indent-tabs-mode: nil + * End: + */ diff --git a/xen/arch/riscv/shutdown.c b/xen/arch/riscv/shutdown.c new file mode 100644 index 0000000000..bfa1174366 --- /dev/null +++ b/xen/arch/riscv/shutdown.c @@ -0,0 +1,28 @@ +/* + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +void machine_halt(void) +{ +} + +void machine_restart(unsigned int delay_millisecs) +{ +} + +/* + * Local variables: + * mode: C + * c-file-style: "BSD" + * c-basic-offset: 4 + * indent-tabs-mode: nil + * End: + */ diff --git a/xen/arch/riscv/smp.c b/xen/arch/riscv/smp.c new file mode 100644 index 0000000000..66f1012b37 --- /dev/null +++ b/xen/arch/riscv/smp.c @@ -0,0 +1,35 @@ +/* + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <xen/cpumask.h> +#include <asm/smp.h> + +void arch_flush_tlb_mask(const cpumask_t *mask) +{ +} + +void smp_send_event_check_mask(const cpumask_t *mask) +{ +} + +void smp_send_call_function_mask(const cpumask_t *mask) +{ +} + +/* + * Local variables: + * mode: C + * c-file-style: "BSD" + * c-basic-offset: 4 + * indent-tabs-mode: nil + * End: + */ diff --git a/xen/arch/riscv/smpboot.c b/xen/arch/riscv/smpboot.c new file mode 100644 index 0000000000..567d12a262 --- /dev/null +++ b/xen/arch/riscv/smpboot.c @@ -0,0 +1,34 @@ +/* + * Dummy smpboot support + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ +#include <xen/cpu.h> +#include <xen/cpumask.h> +#include <xen/errno.h> +#include <xen/init.h> +#include <xen/sched.h> +#include <xen/smp.h> +#include <xen/nodemask.h> + +cpumask_t cpu_online_map; +cpumask_t cpu_present_map; +cpumask_t cpu_possible_map; + +DEFINE_PER_CPU(unsigned int, cpu_id); +DEFINE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_sibling_mask); +DEFINE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_core_mask); + +/* Fake one node for now. See also include/asm-arm/numa.h */ +nodemask_t __read_mostly node_online_map = { { [0] = 1UL } }; + +/* Boot cpu data */ +struct init_info init_data = {}; diff --git a/xen/arch/riscv/sysctl.c b/xen/arch/riscv/sysctl.c new file mode 100644 index 0000000000..9b4ef27aac --- /dev/null +++ b/xen/arch/riscv/sysctl.c @@ -0,0 +1,33 @@ +/****************************************************************************** + * Arch-specific sysctl.c + * + * System management operations. For use by node control stack. + * + * Copyright (c) 2012, Citrix Systems + */ + +#include <xen/types.h> +#include <xen/lib.h> +#include <xen/errno.h> +#include <xen/hypercall.h> +#include <public/sysctl.h> + +void arch_do_physinfo(struct xen_sysctl_physinfo *pi) +{ +} + +long arch_do_sysctl(struct xen_sysctl *sysctl, + XEN_GUEST_HANDLE_PARAM(xen_sysctl_t) u_sysctl) +{ + return -EOPNOTSUPP; +} + +/* + * Local variables: + * mode: C + * c-file-style: "BSD" + * c-basic-offset: 4 + * tab-width: 4 + * indent-tabs-mode: nil + * End: + */ diff --git a/xen/arch/riscv/time.c b/xen/arch/riscv/time.c new file mode 100644 index 0000000000..4d7269195d --- /dev/null +++ b/xen/arch/riscv/time.c @@ -0,0 +1,35 @@ +/* + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <xen/sched.h> +#include <xen/time.h> + +unsigned long __read_mostly cpu_khz; /* CPU clock frequency in kHz. */ + +s_time_t get_s_time(void) +{ + return 0; +} + +/* VCPU PV timers. */ +void send_timer_event(struct vcpu *v) +{ +} + +void domain_set_time_offset(struct domain *d, int64_t time_offset_seconds) +{ +} + +int reprogram_timer(s_time_t timeout) +{ + return 0; +} diff --git a/xen/arch/riscv/traps.c b/xen/arch/riscv/traps.c new file mode 100644 index 0000000000..5287894954 --- /dev/null +++ b/xen/arch/riscv/traps.c @@ -0,0 +1,35 @@ +/* + * RISC-V Trap handlers + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <public/xen.h> +#include <xen/multicall.h> +#include <xen/sched.h> +#include <asm/processor.h> + +void show_execution_state(const struct cpu_user_regs *regs) +{ +} + +void vcpu_show_execution_state(struct vcpu *v) +{ +} + +void arch_hypercall_tasklet_result(struct vcpu *v, long res) +{ +} + +enum mc_disposition arch_do_multicall_call(struct mc_state *state) +{ + return mc_continue; +} diff --git a/xen/arch/riscv/vm_event.c b/xen/arch/riscv/vm_event.c new file mode 100644 index 0000000000..6c759f85a6 --- /dev/null +++ b/xen/arch/riscv/vm_event.c @@ -0,0 +1,39 @@ +/* + * Architecture-specific vm_event handling routines + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public + * License v2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public + * License along with this program; If not, see <http://www.gnu.org/licenses/>. + */ + +#include <xen/sched.h> +#include <asm/vm_event.h> + +void vm_event_fill_regs(vm_event_request_t *req) +{ +} + +void vm_event_set_registers(struct vcpu *v, vm_event_response_t *rsp) +{ +} + +void vm_event_monitor_next_interrupt(struct vcpu *v) +{ +} + +/* + * Local variables: + * mode: C + * c-file-style: "BSD" + * c-basic-offset: 4 + * indent-tabs-mode: nil + * End: + */ diff --git a/xen/arch/riscv/xen.lds.S b/xen/arch/riscv/xen.lds.S new file mode 100644 index 0000000000..6b95fc84da --- /dev/null +++ b/xen/arch/riscv/xen.lds.S @@ -0,0 +1,113 @@ +/* Excerpts written by Martin Mares <mj@xxxxxxxxxxxxxxxxxxxxxxxx> */ +/* Modified for i386/x86-64 Xen by Keir Fraser */ +/* Modified for ARM Xen by Ian Campbell */ + +#include <xen/cache.h> +#include <asm/page.h> +#undef ENTRY +#undef ALIGN + +ENTRY(start) +OUTPUT_ARCH(riscv) + +PHDRS +{ + text PT_LOAD ; +#if defined(BUILD_ID) + note PT_NOTE ; +#endif +} +SECTIONS +{ + . = XEN_VIRT_START; + _start = .; + .text : { + _stext = .; /* Text section */ + *(.text) + *(.text.cold) + *(.text.unlikely) + *(.fixup) + *(.gnu.warning) + _etext = .; /* End of text section */ + } :text = 0x9090 + + . = ALIGN(PAGE_SIZE); + .rodata : { + _srodata = .; /* Read-only data */ + /* Bug frames table */ + __start_bug_frames = .; + *(.bug_frames.0) + __stop_bug_frames_0 = .; + *(.bug_frames.1) + __stop_bug_frames_1 = .; + *(.bug_frames.2) + __stop_bug_frames_2 = .; + *(.bug_frames.3) + __stop_bug_frames_3 = .; + *(.rodata) + *(.rodata.*) + *(.data.rel.ro) + *(.data.rel.ro.*) + } :text + +#if defined(BUILD_ID) + . = ALIGN(4); + .note.gnu.build-id : { + __note_gnu_build_id_start = .; + *(.note.gnu.build-id) + __note_gnu_build_id_end = .; + } :note :text +#endif + _erodata = .; /* End of read-only data */ + + .data : { /* Data */ + . = ALIGN(PAGE_SIZE); + *(.data.page_aligned) + *(.data) + + . = ALIGN(8); + __start_schedulers_array = .; + *(.data.schedulers) + __end_schedulers_array = .; + + *(.data.rel) + *(.data.rel.*) + CONSTRUCTORS + } :text + + . = ALIGN(SMP_CACHE_BYTES); + .data.read_mostly : { + *(.data.read_mostly) + } :text + + . = ALIGN(PAGE_SIZE); /* Init code and data */ + __init_begin = .; + .init.text : { + _sinittext = .; + *(.init.text) + _einittext = .; + } :text + . = ALIGN(PAGE_SIZE); + .init.data : { + *(.init.rodata) + *(.init.rodata.*) + + . = ALIGN(POINTER_ALIGN); + __setup_start = .; + *(.init.setup) + __setup_end = .; + + __initcall_start = .; + *(.initcallpresmp.init) + __presmp_initcall_end = .; + *(.initcall1.init) + __initcall_end = .; + + *(.init.data) + *(.init.data.rel) + *(.init.data.rel.*) + } :text + . = ALIGN(STACK_SIZE); + __init_end = .; + _end = . ; +} diff --git a/xen/drivers/char/serial.c b/xen/drivers/char/serial.c index 5ecba0af33..b84c316784 100644 --- a/xen/drivers/char/serial.c +++ b/xen/drivers/char/serial.c @@ -12,6 +12,7 @@ #include <xen/param.h> #include <xen/serial.h> #include <xen/cache.h> +#include <asm/processor.h> /* Never drop characters, even if the async transmit buffer fills. */ /* #define SERIAL_NEVER_DROP_CHARS 1 */ diff --git a/xen/include/asm-riscv/altp2m.h b/xen/include/asm-riscv/altp2m.h new file mode 100644 index 0000000000..8554495f94 --- /dev/null +++ b/xen/include/asm-riscv/altp2m.h @@ -0,0 +1,39 @@ +/* + * Alternate p2m + * + * Copyright (c) 2014, Intel Corporation. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License along with + * this program; If not, see <http://www.gnu.org/licenses/>. + */ + +#ifndef __ASM_RISCV_ALTP2M_H +#define __ASM_RISCV_ALTP2M_H + +#include <xen/sched.h> + +/* Alternate p2m on/off per domain */ +static inline bool altp2m_active(const struct domain *d) +{ + /* Not implemented on RISCV. */ + return false; +} + +/* Alternate p2m VCPU */ +static inline uint16_t altp2m_vcpu_idx(const struct vcpu *v) +{ + /* Not implemented on RISCV, should not be reached. */ + BUG(); + return 0; +} + +#endif /* __ASM_RISCV_ALTP2M_H */ diff --git a/xen/include/asm-riscv/asm.h b/xen/include/asm-riscv/asm.h new file mode 100644 index 0000000000..2dafac5b35 --- /dev/null +++ b/xen/include/asm-riscv/asm.h @@ -0,0 +1,77 @@ +/* + * Copyright (C) 2015 Regents of the University of California + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation, version 2. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#ifndef _ASM_RISCV_ASM_H +#define _ASM_RISCV_ASM_H + +#ifdef __ASSEMBLY__ +#define __ASM_STR(x) x +#else +#define __ASM_STR(x) #x +#endif + +#if __riscv_xlen == 64 +#define __REG_SEL(a, b) __ASM_STR(a) +#elif __riscv_xlen == 32 +#define __REG_SEL(a, b) __ASM_STR(b) +#else +#error "Unexpected __riscv_xlen" +#endif + +#define REG_L __REG_SEL(ld, lw) +#define REG_S __REG_SEL(sd, sw) +#define REG_SC __REG_SEL(sc.d, sc.w) +#define SZREG __REG_SEL(8, 4) +#define LGREG __REG_SEL(3, 2) + +#if __SIZEOF_POINTER__ == 8 +#ifdef __ASSEMBLY__ +#define RISCV_PTR .dword +#define RISCV_SZPTR 8 +#define RISCV_LGPTR 3 +#else +#define RISCV_PTR ".dword" +#define RISCV_SZPTR "8" +#define RISCV_LGPTR "3" +#endif +#elif __SIZEOF_POINTER__ == 4 +#ifdef __ASSEMBLY__ +#define RISCV_PTR .word +#define RISCV_SZPTR 4 +#define RISCV_LGPTR 2 +#else +#define RISCV_PTR ".word" +#define RISCV_SZPTR "4" +#define RISCV_LGPTR "2" +#endif +#else +#error "Unexpected __SIZEOF_POINTER__" +#endif + +#if (__SIZEOF_INT__ == 4) +#define RISCV_INT __ASM_STR(.word) +#define RISCV_SZINT __ASM_STR(4) +#define RISCV_LGINT __ASM_STR(2) +#else +#error "Unexpected __SIZEOF_INT__" +#endif + +#if (__SIZEOF_SHORT__ == 2) +#define RISCV_SHORT __ASM_STR(.half) +#define RISCV_SZSHORT __ASM_STR(2) +#define RISCV_LGSHORT __ASM_STR(1) +#else +#error "Unexpected __SIZEOF_SHORT__" +#endif + +#endif /* _ASM_RISCV_ASM_H */ diff --git a/xen/include/asm-riscv/asm_defns.h b/xen/include/asm-riscv/asm_defns.h new file mode 100644 index 0000000000..9145f9cbf1 --- /dev/null +++ b/xen/include/asm-riscv/asm_defns.h @@ -0,0 +1,24 @@ +#ifndef __RISCV_ASM_DEFNS_H__ +#define __RISCV_ASM_DEFNS_H__ + +#ifndef COMPILE_OFFSETS +/* NB. Auto-generated from arch/.../asm-offsets.c */ +#include <asm/asm-offsets.h> +#endif +#include <asm/processor.h> + +#define ASM_INT(label, val) \ + .p2align 2; \ +label: .long (val); \ + .size label, . - label; \ + .type label, @object + +#endif /* __RISCV_ASM_DEFNS_H__ */ +/* + * Local variables: + * mode: C + * c-file-style: "BSD" + * c-basic-offset: 4 + * indent-tabs-mode: nil + * End: + */ diff --git a/xen/include/asm-riscv/atomic.h b/xen/include/asm-riscv/atomic.h new file mode 100644 index 0000000000..7ffae3bd74 --- /dev/null +++ b/xen/include/asm-riscv/atomic.h @@ -0,0 +1,204 @@ +/** + * Copyright (c) 2018 Anup Patel. + * Copyright (c) 2019 Alistair Francis <alistair.francis@xxxxxxx> + * Copyright (c) 2021 Connor Davis <connojd@xxxxx> + * All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2, or (at your option) + * any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * + */ + +#ifndef _ASM_RISCV_ATOMIC_H +#define _ASM_RISCV_ATOMIC_H + +#include <xen/atomic.h> +#include <asm/compiler_types.h> +#include <asm/cmpxchg.h> +#include <asm/system.h> + +void __bad_atomic_size(void); + +/* + * Adapted from {READ,WRITE}_ONCE in linux/include/asm-generic/rwonce.h, + * with the exception of only allowing types with size at most sizeof(long). + * Linux allows sizes <= sizeof(long long), but long long's will tear on + * RV32, so we exclude them. + */ +#define read_atomic(p) ({ \ + BUILD_BUG_ON(!__native_word(typeof(*(p)))); \ + (*(const volatile __unqual_scalar_typeof(*(p)) *)(p)); \ +}) + +#define write_atomic(p, x) \ +do { \ + BUILD_BUG_ON(!__native_word(typeof(*(p)))); \ + *(volatile typeof(*(p)) *)(p) = (x); \ +} while (0) + +#define build_add_sized(name, size, type) \ +static inline void name(volatile type *addr, type val) \ +{ \ + type t; \ + asm volatile("l" size "u %1, %0\n" \ + "add %1, %1, %2\n" \ + "s" size " %1, %0\n" \ + : "+m" (*addr), "=&r" (t) \ + : "r" (val)); \ +} + +build_add_sized(add_u8_sized, "b", uint8_t) +build_add_sized(add_u16_sized, "h", uint16_t) +build_add_sized(add_u32_sized, "w", uint32_t) + +#define add_sized(p, x) ({ \ + typeof(*(p)) x_ = (x); \ + switch ( sizeof(*(p)) ) \ + { \ + case 1: add_u8_sized((uint8_t *)(p), x_); break; \ + case 2: add_u16_sized((uint16_t *)(p), x_); break; \ + case 4: add_u32_sized((uint32_t *)(p), x_); break; \ + default: __bad_atomic_size(); break; \ + } \ +}) + +/* + * Snipped from linux/arch/riscv/include/asm/atomic.h: + * + * First, the atomic ops that have no ordering constraints and therefor don't + * have the AQ or RL bits set. These don't return anything, so there's only + * one version to worry about. + */ +#define ATOMIC_OP(op, asm_op, I) \ +static always_inline void atomic_##op(int i, atomic_t *v) \ +{ \ + __asm__ __volatile__ ( \ + " amo" #asm_op ".w" " zero, %1, %0" \ + : "+A" (v->counter) \ + : "r" (I) \ + : "memory"); \ +} \ + +ATOMIC_OP(add, add, i) +ATOMIC_OP(sub, add, -i) +ATOMIC_OP(and, and, i) + +#undef ATOMIC_OP + +/* The *_return variants provide full barriers */ +#define ATOMIC_OP_RETURN(op, asm_op, c_op, I) \ +static always_inline int atomic_fetch_##op(int i, atomic_t *v) \ +{ \ + register int ret; \ + __asm__ __volatile__ ( \ + " amo" #asm_op ".w.aqrl %1, %2, %0" \ + : "+A" (v->counter), "=r" (ret) \ + : "r" (I) \ + : "memory"); \ + return ret; \ +} \ +static always_inline int atomic_##op##_return(int i, atomic_t *v) \ +{ \ + return atomic_fetch_##op(i, v) c_op I; \ +} + +ATOMIC_OP_RETURN(add, add, +, i) +ATOMIC_OP_RETURN(sub, add, +, -i) + +#undef ATOMIC_OP_RETURN + +static inline int atomic_read(const atomic_t *v) +{ + return read_atomic(&v->counter); +} + +static inline int _atomic_read(atomic_t v) +{ + return v.counter; +} + +static inline void atomic_set(atomic_t *v, int i) +{ + write_atomic(&v->counter, i); +} + +static inline void _atomic_set(atomic_t *v, int i) +{ + v->counter = i; +} + +static inline int atomic_sub_and_test(int i, atomic_t *v) +{ + return atomic_sub_return(i, v) == 0; +} + +static inline void atomic_inc(atomic_t *v) +{ + atomic_add(1, v); +} + +static inline int atomic_inc_return(atomic_t *v) +{ + return atomic_add_return(1, v); +} + +static inline int atomic_inc_and_test(atomic_t *v) +{ + return atomic_add_return(1, v) == 0; +} + +static inline void atomic_dec(atomic_t *v) +{ + atomic_sub(1, v); +} + +static inline int atomic_dec_return(atomic_t *v) +{ + return atomic_sub_return(1, v); +} + +static inline int atomic_dec_and_test(atomic_t *v) +{ + return atomic_sub_return(1, v) == 0; +} + +static inline int atomic_add_negative(int i, atomic_t *v) +{ + return atomic_add_return(i, v) < 0; +} + +static inline int atomic_cmpxchg(atomic_t *v, int old, int new) +{ + return cmpxchg(&v->counter, old, new); +} + +static inline int atomic_add_unless(atomic_t *v, int a, int u) +{ + int prev, rc; + + __asm__ __volatile__ ( + "0: lr.w %[p], %[c]\n" + " beq %[p], %[u], 1f\n" + " add %[rc], %[p], %[a]\n" + " sc.w.rl %[rc], %[rc], %[c]\n" + " bnez %[rc], 0b\n" + " fence rw, rw\n" + "1:\n" + : [p]"=&r" (prev), [rc]"=&r" (rc), [c]"+A" (v->counter) + : [a]"r" (a), [u]"r" (u) + : "memory"); + return prev; +} + +#endif /* _ASM_RISCV_ATOMIC_H */ diff --git a/xen/include/asm-riscv/bitops.h b/xen/include/asm-riscv/bitops.h new file mode 100644 index 0000000000..f2f6f63b03 --- /dev/null +++ b/xen/include/asm-riscv/bitops.h @@ -0,0 +1,331 @@ +/* + * Copyright (C) 2012 Regents of the University of California + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation, version 2. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#ifndef _ASM_RISCV_BITOPS_H +#define _ASM_RISCV_BITOPS_H + +#include <asm/system.h> + +#define BIT_ULL(nr) (1ULL << (nr)) +#define BIT_MASK(nr) (1UL << ((nr) % BITS_PER_LONG)) +#define BIT_WORD(nr) ((nr) / BITS_PER_LONG) +#define BIT_ULL_MASK(nr) (1ULL << ((nr) % BITS_PER_LONG_LONG)) +#define BIT_ULL_WORD(nr) ((nr) / BITS_PER_LONG_LONG) +#define BITS_PER_BYTE 8 + +#define __set_bit(n,p) set_bit(n,p) +#define __clear_bit(n,p) clear_bit(n,p) + +#define BITS_PER_WORD 32 + +#ifndef smp_mb__before_clear_bit +#define smp_mb__before_clear_bit() smp_mb() +#define smp_mb__after_clear_bit() smp_mb() +#endif /* smp_mb__before_clear_bit */ + +#if (BITS_PER_LONG == 64) +#define __AMO(op) "amo" #op ".d" +#elif (BITS_PER_LONG == 32) +#define __AMO(op) "amo" #op ".w" +#else +#error "Unexpected BITS_PER_LONG" +#endif + +#define __test_and_op_bit_ord(op, mod, nr, addr, ord) \ +({ \ + unsigned long __res, __mask; \ + __mask = BIT_MASK(nr); \ + __asm__ __volatile__ ( \ + __AMO(op) #ord " %0, %2, %1" \ + : "=r" (__res), "+A" (addr[BIT_WORD(nr)]) \ + : "r" (mod(__mask)) \ + : "memory"); \ + ((__res & __mask) != 0); \ +}) + +#define __op_bit_ord(op, mod, nr, addr, ord) \ + __asm__ __volatile__ ( \ + __AMO(op) #ord " zero, %1, %0" \ + : "+A" (addr[BIT_WORD(nr)]) \ + : "r" (mod(BIT_MASK(nr))) \ + : "memory"); + +#define __test_and_op_bit(op, mod, nr, addr) \ + __test_and_op_bit_ord(op, mod, nr, addr, .aqrl) +#define __op_bit(op, mod, nr, addr) \ + __op_bit_ord(op, mod, nr, addr, ) + +/* Bitmask modifiers */ +#define __NOP(x) (x) +#define __NOT(x) (~(x)) + +/** + * __test_and_set_bit - Set a bit and return its old value + * @nr: Bit to set + * @addr: Address to count from + * + * This operation may be reordered on other architectures than x86. + */ +static inline int __test_and_set_bit(int nr, volatile void *p) +{ + volatile unsigned long *addr = p; + + return __test_and_op_bit(or, __NOP, nr, addr); +} + +/** + * __test_and_clear_bit - Clear a bit and return its old value + * @nr: Bit to clear + * @addr: Address to count from + * + * This operation can be reordered on other architectures other than x86. + */ +static inline int __test_and_clear_bit(int nr, volatile void *p) +{ + volatile unsigned long *addr = p; + + return __test_and_op_bit(and, __NOT, nr, addr); +} + +/** + * __test_and_change_bit - Change a bit and return its old value + * @nr: Bit to change + * @addr: Address to count from + * + * This operation is atomic and cannot be reordered. + * It also implies a memory barrier. + */ +static inline int __test_and_change_bit(int nr, volatile void *p) +{ + volatile unsigned long *addr = p; + + return __test_and_op_bit(xor, __NOP, nr, addr); +} + +/** + * set_bit - Atomically set a bit in memory + * @nr: the bit to set + * @addr: the address to start counting from + * + * Note: there are no guarantees that this function will not be reordered + * on non x86 architectures, so if you are writing portable code, + * make sure not to rely on its reordering guarantees. + * + * Note that @nr may be almost arbitrarily large; this function is not + * restricted to acting on a single-word quantity. + */ +static inline void set_bit(int nr, volatile void *p) +{ + volatile unsigned long *addr = p; + + __op_bit(or, __NOP, nr, addr); +} + +/** + * clear_bit - Clears a bit in memory + * @nr: Bit to clear + * @addr: Address to start counting from + * + * Note: there are no guarantees that this function will not be reordered + * on non x86 architectures, so if you are writing portable code, + * make sure not to rely on its reordering guarantees. + */ +static inline void clear_bit(int nr, volatile void *p) +{ + volatile unsigned long *addr = p; + + __op_bit(and, __NOT, nr, addr); +} + +static inline int test_bit(int nr, const volatile void *p) +{ + const volatile unsigned int *addr = (const volatile unsigned int *)p; + + return 1UL & (addr[BIT_WORD(nr)] >> (nr & (BITS_PER_WORD-1))); +} + +/** + * change_bit - Toggle a bit in memory + * @nr: Bit to change + * @addr: Address to start counting from + * + * change_bit() may be reordered on other architectures than x86. + * Note that @nr may be almost arbitrarily large; this function is not + * restricted to acting on a single-word quantity. + */ +static inline void change_bit(int nr, volatile void *p) +{ + volatile unsigned long *addr = p; + + __op_bit(xor, __NOP, nr, addr); +} + +/** + * test_and_set_bit_lock - Set a bit and return its old value, for lock + * @nr: Bit to set + * @addr: Address to count from + * + * This operation is atomic and provides acquire barrier semantics. + * It can be used to implement bit locks. + */ +static inline int test_and_set_bit_lock( + unsigned long nr, volatile void *p) +{ + volatile unsigned long *addr = p; + + return __test_and_op_bit_ord(or, __NOP, nr, addr, .aq); +} + +/** + * clear_bit_unlock - Clear a bit in memory, for unlock + * @nr: the bit to set + * @addr: the address to start counting from + * + * This operation is atomic and provides release barrier semantics. + */ +static inline void clear_bit_unlock( + unsigned long nr, volatile void *p) +{ + volatile unsigned long *addr = p; + + __op_bit_ord(and, __NOT, nr, addr, .rl); +} + +/** + * __clear_bit_unlock - Clear a bit in memory, for unlock + * @nr: the bit to set + * @addr: the address to start counting from + * + * This operation is like clear_bit_unlock, however it is not atomic. + * It does provide release barrier semantics so it can be used to unlock + * a bit lock, however it would only be used if no other CPU can modify + * any bits in the memory until the lock is released (a good example is + * if the bit lock itself protects access to the other bits in the word). + * + * On RISC-V systems there seems to be no benefit to taking advantage of the + * non-atomic property here: it's a lot more instructions and we still have to + * provide release semantics anyway. + */ +static inline void __clear_bit_unlock( + unsigned long nr, volatile unsigned long *addr) +{ + clear_bit_unlock(nr, addr); +} + +#undef __test_and_op_bit +#undef __op_bit +#undef __NOP +#undef __NOT +#undef __AMO + +static inline int fls(unsigned int x) +{ + return generic_fls(x); +} + +static inline int flsl(unsigned long x) +{ + return generic_flsl(x); +} + + +#define test_and_set_bit __test_and_set_bit +#define test_and_clear_bit __test_and_clear_bit + +/* Based on linux/include/asm-generic/bitops/find.h */ + +#ifndef find_next_bit +/** + * find_next_bit - find the next set bit in a memory region + * @addr: The address to base the search on + * @offset: The bitnumber to start searching at + * @size: The bitmap size in bits + */ +extern unsigned long find_next_bit(const unsigned long *addr, unsigned long + size, unsigned long offset); +#endif + +#ifndef find_next_zero_bit +/** + * find_next_zero_bit - find the next cleared bit in a memory region + * @addr: The address to base the search on + * @offset: The bitnumber to start searching at + * @size: The bitmap size in bits + */ +extern unsigned long find_next_zero_bit(const unsigned long *addr, unsigned + long size, unsigned long offset); +#endif + +#ifdef CONFIG_GENERIC_FIND_FIRST_BIT + +/** + * find_first_bit - find the first set bit in a memory region + * @addr: The address to start the search at + * @size: The maximum size to search + * + * Returns the bit number of the first set bit. + */ +extern unsigned long find_first_bit(const unsigned long *addr, + unsigned long size); + +/** + * find_first_zero_bit - find the first cleared bit in a memory region + * @addr: The address to start the search at + * @size: The maximum size to search + * + * Returns the bit number of the first cleared bit. + */ +extern unsigned long find_first_zero_bit(const unsigned long *addr, + unsigned long size); +#else /* CONFIG_GENERIC_FIND_FIRST_BIT */ + +#define find_first_bit(addr, size) find_next_bit((addr), (size), 0) +#define find_first_zero_bit(addr, size) find_next_zero_bit((addr), (size), 0) + +#endif /* CONFIG_GENERIC_FIND_FIRST_BIT */ + +#define ffs(x) ({ unsigned int __t = (x); fls(__t & -__t); }) +#define ffsl(x) ({ unsigned long __t = (x); flsl(__t & -__t); }) + +/* + * ffz - find first zero in word. + * @word: The word to search + * + * Undefined if no zero exists, so code should check against ~0UL first. + */ +#define ffz(x) ffs(~(x)) + +/** + * find_first_set_bit - find the first set bit in @word + * @word: the word to search + * + * Returns the bit-number of the first set bit (first bit being 0). + * The input must *not* be zero. + */ +static inline unsigned int find_first_set_bit(unsigned long word) +{ + return ffsl(word) - 1; +} + +/** + * hweightN - returns the hamming weight of a N-bit word + * @x: the word to weigh + * + * The Hamming Weight of a number is the total number of bits set in it. + */ +#define hweight64(x) generic_hweight64(x) +#define hweight32(x) generic_hweight32(x) +#define hweight16(x) generic_hweight16(x) +#define hweight8(x) generic_hweight8(x) + +#endif /* _ASM_RISCV_BITOPS_H */ diff --git a/xen/include/asm-riscv/bug.h b/xen/include/asm-riscv/bug.h new file mode 100644 index 0000000000..cdf4c0ebd4 --- /dev/null +++ b/xen/include/asm-riscv/bug.h @@ -0,0 +1,54 @@ +/* + * Copyright (C) 2012 Regents of the University of California + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation, version 2. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#ifndef _ASM_RISCV_BUG_H +#define _ASM_RISCV_BUG_H + +#define BUGFRAME_NR 4 + +#ifndef __ASSEMBLY__ + +struct bug_frame { + signed int loc_disp; /* Relative address to the bug address */ + signed int file_disp; /* Relative address to the filename */ + signed int msg_disp; /* Relative address to the predicate (for ASSERT) */ + uint16_t line; /* Line number */ + uint32_t pad0:16; /* Padding for 8-bytes align */ +}; + +#define BUG() \ +do { \ + __asm__ __volatile__ ("ebreak\n"); \ + unreachable(); \ +} while (0) + +#define WARN() \ +do { \ + BUG(); \ +} while (0) + +#define assert_failed(msg) do { \ + BUG(); \ +} while (0) + +#define run_in_exception_handler(fn) BUG() + +extern const struct bug_frame __start_bug_frames[], + __stop_bug_frames_0[], + __stop_bug_frames_1[], + __stop_bug_frames_2[], + __stop_bug_frames_3[]; + +#endif /* !__ASSEMBLY__ */ + +#endif /* _ASM_RISCV_BUG_H */ diff --git a/xen/include/asm-riscv/byteorder.h b/xen/include/asm-riscv/byteorder.h new file mode 100644 index 0000000000..320a03c88f --- /dev/null +++ b/xen/include/asm-riscv/byteorder.h @@ -0,0 +1,16 @@ +#ifndef __ASM_RISCV_BYTEORDER_H__ +#define __ASM_RISCV_BYTEORDER_H__ + +#define __BYTEORDER_HAS_U64__ + +#include <xen/byteorder/little_endian.h> + +#endif /* __ASM_RISCV_BYTEORDER_H__ */ +/* + * Local variables: + * mode: C + * c-file-style: "BSD" + * c-basic-offset: 4 + * indent-tabs-mode: nil + * End: + */ diff --git a/xen/include/asm-riscv/cache.h b/xen/include/asm-riscv/cache.h new file mode 100644 index 0000000000..394782ca8e --- /dev/null +++ b/xen/include/asm-riscv/cache.h @@ -0,0 +1,24 @@ +/* + * Copyright (C) 2017 Chen Liqin <liqin.chen@xxxxxxxxxxxxx> + * Copyright (C) 2012 Regents of the University of California + * Copyright (C) 2021 Connor Davis <connojd@xxxxx> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation, version 2. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#ifndef _ASM_RISCV_CACHE_H +#define _ASM_RISCV_CACHE_H + +#define L1_CACHE_SHIFT CONFIG_RISCV_L1_CACHE_SHIFT +#define L1_CACHE_BYTES (1 << L1_CACHE_SHIFT) + +#define __read_mostly __section(".data.read_mostly") + +#endif /* _ASM_RISCV_CACHE_H */ diff --git a/xen/include/asm-riscv/cmpxchg.h b/xen/include/asm-riscv/cmpxchg.h new file mode 100644 index 0000000000..b7113fa546 --- /dev/null +++ b/xen/include/asm-riscv/cmpxchg.h @@ -0,0 +1,382 @@ +/* + * Copyright (C) 2014 Regents of the University of California + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation, version 2. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#ifndef _ASM_RISCV_CMPXCHG_H +#define _ASM_RISCV_CMPXCHG_H + +#include <asm/system.h> +#include <asm/fence.h> +#include <xen/lib.h> + +#define __xchg_relaxed(ptr, new, size) \ +({ \ + __typeof__(ptr) __ptr = (ptr); \ + __typeof__(new) __new = (new); \ + __typeof__(*(ptr)) __ret; \ + switch (size) { \ + case 4: \ + __asm__ __volatile__ ( \ + " amoswap.w %0, %2, %1\n" \ + : "=r" (__ret), "+A" (*__ptr) \ + : "r" (__new) \ + : "memory"); \ + break; \ + case 8: \ + __asm__ __volatile__ ( \ + " amoswap.d %0, %2, %1\n" \ + : "=r" (__ret), "+A" (*__ptr) \ + : "r" (__new) \ + : "memory"); \ + break; \ + default: \ + ASSERT_UNREACHABLE(); \ + } \ + __ret; \ +}) + +#define xchg_relaxed(ptr, x) \ +({ \ + __typeof__(*(ptr)) _x_ = (x); \ + (__typeof__(*(ptr))) __xchg_relaxed((ptr), \ + _x_, sizeof(*(ptr))); \ +}) + +#define __xchg_acquire(ptr, new, size) \ +({ \ + __typeof__(ptr) __ptr = (ptr); \ + __typeof__(new) __new = (new); \ + __typeof__(*(ptr)) __ret; \ + switch (size) { \ + case 4: \ + __asm__ __volatile__ ( \ + " amoswap.w %0, %2, %1\n" \ + RISCV_ACQUIRE_BARRIER \ + : "=r" (__ret), "+A" (*__ptr) \ + : "r" (__new) \ + : "memory"); \ + break; \ + case 8: \ + __asm__ __volatile__ ( \ + " amoswap.d %0, %2, %1\n" \ + RISCV_ACQUIRE_BARRIER \ + : "=r" (__ret), "+A" (*__ptr) \ + : "r" (__new) \ + : "memory"); \ + break; \ + default: \ + ASSERT_UNREACHABLE(); \ + } \ + __ret; \ +}) + +#define xchg_acquire(ptr, x) \ +({ \ + __typeof__(*(ptr)) _x_ = (x); \ + (__typeof__(*(ptr))) __xchg_acquire((ptr), \ + _x_, sizeof(*(ptr))); \ +}) + +#define __xchg_release(ptr, new, size) \ +({ \ + __typeof__(ptr) __ptr = (ptr); \ + __typeof__(new) __new = (new); \ + __typeof__(*(ptr)) __ret = 0; \ + switch (size) { \ + case 4: \ + __asm__ __volatile__ ( \ + RISCV_RELEASE_BARRIER \ + " amoswap.w %0, %2, %1\n" \ + : "=r" (__ret), "+A" (*__ptr) \ + : "r" (__new) \ + : "memory"); \ + break; \ + case 8: \ + __asm__ __volatile__ ( \ + RISCV_RELEASE_BARRIER \ + " amoswap.d %0, %2, %1\n" \ + : "=r" (__ret), "+A" (*__ptr) \ + : "r" (__new) \ + : "memory"); \ + break; \ + default: \ + ASSERT_UNREACHABLE(); \ + } \ + __ret; \ +}) + +#define xchg_release(ptr, x) \ +({ \ + __typeof__(*(ptr)) _x_ = (x); \ + (__typeof__(*(ptr))) __xchg_release((ptr), \ + _x_, sizeof(*(ptr))); \ +}) + +#define __xchg(ptr, new, size) \ +({ \ + __typeof__(ptr) __ptr = (ptr); \ + __typeof__(new) __new = (new); \ + __typeof__(*(ptr)) __ret = 0; \ + switch (size) { \ + case 4: \ + __asm__ __volatile__ ( \ + " amoswap.w.aqrl %0, %2, %1\n" \ + : "=r" (__ret), "+A" (*__ptr) \ + : "r" (__new) \ + : "memory"); \ + break; \ + case 8: \ + __asm__ __volatile__ ( \ + " amoswap.d.aqrl %0, %2, %1\n" \ + : "=r" (__ret), "+A" (*__ptr) \ + : "r" (__new) \ + : "memory"); \ + break; \ + default: \ + ASSERT_UNREACHABLE(); \ + } \ + __ret; \ +}) + +#define xchg(ptr, x) \ +({ \ + __typeof__(*(ptr)) _x_ = (x); \ + (__typeof__(*(ptr))) __xchg((ptr), _x_, sizeof(*(ptr))); \ +}) + +#define xchg32(ptr, x) \ +({ \ + BUILD_BUG_ON(sizeof(*(ptr)) != 4); \ + xchg((ptr), (x)); \ +}) + +#define xchg64(ptr, x) \ +({ \ + BUILD_BUG_ON(sizeof(*(ptr)) != 8); \ + xchg((ptr), (x)); \ +}) + +/* + * Atomic compare and exchange. Compare OLD with MEM, if identical, + * store NEW in MEM. Return the initial value in MEM. Success is + * indicated by comparing RETURN with OLD. + */ +#define __cmpxchg_relaxed(ptr, old, new, size) \ +({ \ + __typeof__(ptr) __ptr = (ptr); \ + __typeof__(*(ptr)) __old = (old); \ + __typeof__(*(ptr)) __new = (new); \ + __typeof__(*(ptr)) __ret; \ + register unsigned int __rc; \ + switch (size) { \ + case 4: \ + __asm__ __volatile__ ( \ + "0: lr.w %0, %2\n" \ + " bne %0, %z3, 1f\n" \ + " sc.w %1, %z4, %2\n" \ + " bnez %1, 0b\n" \ + "1:\n" \ + : "=&r" (__ret), "=&r" (__rc), "+A" (*__ptr) \ + : "rJ" (__old), "rJ" (__new) \ + : "memory"); \ + break; \ + case 8: \ + __asm__ __volatile__ ( \ + "0: lr.d %0, %2\n" \ + " bne %0, %z3, 1f\n" \ + " sc.d %1, %z4, %2\n" \ + " bnez %1, 0b\n" \ + "1:\n" \ + : "=&r" (__ret), "=&r" (__rc), "+A" (*__ptr) \ + : "rJ" (__old), "rJ" (__new) \ + : "memory"); \ + break; \ + default: \ + ASSERT_UNREACHABLE(); \ + } \ + __ret; \ +}) + +#define cmpxchg_relaxed(ptr, o, n) \ +({ \ + __typeof__(*(ptr)) _o_ = (o); \ + __typeof__(*(ptr)) _n_ = (n); \ + (__typeof__(*(ptr))) __cmpxchg_relaxed((ptr), \ + _o_, _n_, sizeof(*(ptr))); \ +}) + +#define __cmpxchg_acquire(ptr, old, new, size) \ +({ \ + __typeof__(ptr) __ptr = (ptr); \ + __typeof__(*(ptr)) __old = (old); \ + __typeof__(*(ptr)) __new = (new); \ + __typeof__(*(ptr)) __ret; \ + register unsigned int __rc; \ + switch (size) { \ + case 4: \ + __asm__ __volatile__ ( \ + "0: lr.w %0, %2\n" \ + " bne %0, %z3, 1f\n" \ + " sc.w %1, %z4, %2\n" \ + " bnez %1, 0b\n" \ + RISCV_ACQUIRE_BARRIER \ + "1:\n" \ + : "=&r" (__ret), "=&r" (__rc), "+A" (*__ptr) \ + : "rJ" (__old), "rJ" (__new) \ + : "memory"); \ + break; \ + case 8: \ + __asm__ __volatile__ ( \ + "0: lr.d %0, %2\n" \ + " bne %0, %z3, 1f\n" \ + " sc.d %1, %z4, %2\n" \ + " bnez %1, 0b\n" \ + RISCV_ACQUIRE_BARRIER \ + "1:\n" \ + : "=&r" (__ret), "=&r" (__rc), "+A" (*__ptr) \ + : "rJ" (__old), "rJ" (__new) \ + : "memory"); \ + break; \ + default: \ + ASSERT_UNREACHABLE(); \ + } \ + __ret; \ +}) + +#define cmpxchg_acquire(ptr, o, n) \ +({ \ + __typeof__(*(ptr)) _o_ = (o); \ + __typeof__(*(ptr)) _n_ = (n); \ + (__typeof__(*(ptr))) __cmpxchg_acquire((ptr), \ + _o_, _n_, sizeof(*(ptr))); \ +}) + +#define __cmpxchg_release(ptr, old, new, size) \ +({ \ + __typeof__(ptr) __ptr = (ptr); \ + __typeof__(*(ptr)) __old = (old); \ + __typeof__(*(ptr)) __new = (new); \ + __typeof__(*(ptr)) __ret = 0; \ + register unsigned int __rc = 0; \ + switch (size) { \ + case 4: \ + __asm__ __volatile__ ( \ + RISCV_RELEASE_BARRIER \ + "0: lr.w %0, %2\n" \ + " bne %0, %z3, 1f\n" \ + " sc.w %1, %z4, %2\n" \ + " bnez %1, 0b\n" \ + "1:\n" \ + : "=&r" (__ret), "=&r" (__rc), "+A" (*__ptr) \ + : "rJ" (__old), "rJ" (__new) \ + : "memory"); \ + break; \ + case 8: \ + __asm__ __volatile__ ( \ + RISCV_RELEASE_BARRIER \ + "0: lr.d %0, %2\n" \ + " bne %0, %z3, 1f\n" \ + " sc.d %1, %z4, %2\n" \ + " bnez %1, 0b\n" \ + "1:\n" \ + : "=&r" (__ret), "=&r" (__rc), "+A" (*__ptr) \ + : "rJ" (__old), "rJ" (__new) \ + : "memory"); \ + break; \ + default: \ + ASSERT_UNREACHABLE(); \ + } \ + __ret; \ +}) + +#define cmpxchg_release(ptr, o, n) \ +({ \ + __typeof__(*(ptr)) _o_ = (o); \ + __typeof__(*(ptr)) _n_ = (n); \ + (__typeof__(*(ptr))) __cmpxchg_release((ptr), \ + _o_, _n_, sizeof(*(ptr))); \ +}) + +#define __cmpxchg(ptr, old, new, size) \ +({ \ + __typeof__(ptr) __ptr = (ptr); \ + __typeof__(*(ptr)) __old = (__typeof__(*(ptr)))(old); \ + __typeof__(*(ptr)) __new = (__typeof__(*(ptr)))(new); \ + __typeof__(*(ptr)) __ret = 0; \ + register unsigned int __rc = 0; \ + switch (size) { \ + case 4: \ + __asm__ __volatile__ ( \ + "0: lr.w %0, %2\n" \ + " bne %0, %z3, 1f\n" \ + " sc.w.rl %1, %z4, %2\n" \ + " bnez %1, 0b\n" \ + " fence rw, rw\n" \ + "1:\n" \ + : "=&r" (__ret), "=&r" (__rc), "+A" (*__ptr) \ + : "rJ" (__old), "rJ" (__new) \ + : "memory"); \ + break; \ + case 8: \ + __asm__ __volatile__ ( \ + "0: lr.d %0, %2\n" \ + " bne %0, %z3, 1f\n" \ + " sc.d.rl %1, %z4, %2\n" \ + " bnez %1, 0b\n" \ + " fence rw, rw\n" \ + "1:\n" \ + : "=&r" (__ret), "=&r" (__rc), "+A" (*__ptr) \ + : "rJ" (__old), "rJ" (__new) \ + : "memory"); \ + break; \ + default: \ + ASSERT_UNREACHABLE(); \ + } \ + __ret; \ +}) + +#define cmpxchg(ptr, o, n) \ +({ \ + __typeof__(*(ptr)) _o_ = (o); \ + __typeof__(*(ptr)) _n_ = (n); \ + (__typeof__(*(ptr))) __cmpxchg((ptr), \ + _o_, _n_, sizeof(*(ptr))); \ +}) + +#define cmpxchg_local(ptr, o, n) \ + (__cmpxchg_relaxed((ptr), (o), (n), sizeof(*(ptr)))) + +#define cmpxchg32(ptr, o, n) \ +({ \ + BUILD_BUG_ON(sizeof(*(ptr)) != 4); \ + cmpxchg((ptr), (o), (n)); \ +}) + +#define cmpxchg32_local(ptr, o, n) \ +({ \ + BUILD_BUG_ON(sizeof(*(ptr)) != 4); \ + cmpxchg_relaxed((ptr), (o), (n)) \ +}) + +#define cmpxchg64(ptr, o, n) \ +({ \ + BUILD_BUG_ON(sizeof(*(ptr)) != 8); \ + cmpxchg((ptr), (o), (n)); \ +}) + +#define cmpxchg64_local(ptr, o, n) \ +({ \ + BUILD_BUG_ON(sizeof(*(ptr)) != 8); \ + cmpxchg_relaxed((ptr), (o), (n)); \ +}) + +#endif /* _ASM_RISCV_CMPXCHG_H */ diff --git a/xen/include/asm-riscv/compiler_types.h b/xen/include/asm-riscv/compiler_types.h new file mode 100644 index 0000000000..dbe4a8bbff --- /dev/null +++ b/xen/include/asm-riscv/compiler_types.h @@ -0,0 +1,32 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __LINUX_COMPILER_TYPES_H +#define __LINUX_COMPILER_TYPES_H + +/* + * __unqual_scalar_typeof(x) - Declare an unqualified scalar type, leaving + * non-scalar types unchanged. + */ +/* + * Prefer C11 _Generic for better compile-times and simpler code. Note: 'char' + * is not type-compatible with 'signed char', and we define a separate case. + */ +#define __scalar_type_to_expr_cases(type) \ + unsigned type: (unsigned type)0, \ + signed type: (signed type)0 + +#define __unqual_scalar_typeof(x) typeof( \ + _Generic((x), \ + char: (char)0, \ + __scalar_type_to_expr_cases(char), \ + __scalar_type_to_expr_cases(short), \ + __scalar_type_to_expr_cases(int), \ + __scalar_type_to_expr_cases(long), \ + __scalar_type_to_expr_cases(long long), \ + default: (x))) + +/* Is this type a native word size -- useful for atomic operations */ +#define __native_word(t) \ + (sizeof(t) == sizeof(char) || sizeof(t) == sizeof(short) || \ + sizeof(t) == sizeof(int) || sizeof(t) == sizeof(long)) + +#endif /* __LINUX_COMPILER_TYPES_H */ diff --git a/xen/include/asm-riscv/config.h b/xen/include/asm-riscv/config.h new file mode 100644 index 0000000000..84cb436dc1 --- /dev/null +++ b/xen/include/asm-riscv/config.h @@ -0,0 +1,110 @@ +/****************************************************************************** + * config.h + * + * A Linux-style configuration list. + */ + +#ifndef __RISCV_CONFIG_H__ +#define __RISCV_CONFIG_H__ + +#if defined(CONFIG_RISCV_64) +# define LONG_BYTEORDER 3 +# define ELFSIZE 64 +#else +# error "Unsupported RISCV variant" +#endif + +#define BYTES_PER_LONG (1 << LONG_BYTEORDER) +#define BITS_PER_LONG (BYTES_PER_LONG << 3) +#define POINTER_ALIGN BYTES_PER_LONG + +#define BITS_PER_LLONG 64 + +/* xen_ulong_t is always 64 bits */ +#define BITS_PER_XEN_ULONG 64 + +#define CONFIG_RISCV 1 +#define CONFIG_RISCV_L1_CACHE_SHIFT 6 + +#define CONFIG_PAGEALLOC_MAX_ORDER 18 +#define CONFIG_DOMU_MAX_ORDER 9 +#define CONFIG_HWDOM_MAX_ORDER 10 + +#define OPT_CONSOLE_STR "dtuart" + +#ifdef CONFIG_RISCV_64 +#define MAX_VIRT_CPUS 128u +#else +#error "Unsupported RISCV variant" +#endif + +#define INVALID_VCPU_ID MAX_VIRT_CPUS + +/* Linkage for RISCV */ +#ifdef __ASSEMBLY__ +#define ALIGN .align 2 + +#define ENTRY(name) \ + .globl name; \ + ALIGN; \ + name: +#endif + +#include <xen/const.h> + +#ifdef CONFIG_RISCV_64 + +/* + * RISC-V Layout: + * 0x0000000000000000 - 0x0000003fffffffff (256GB, L2 slots [0-255]) + * Unmapped + * 0x0000004000000000 - 0xffffffbfffffffff + * Inaccessible: sv39 only supports 39-bit sign-extended VAs. + * 0xffffffc000000000 - 0xffffffc0001fffff (2MB, L2 slot [256]) + * Unmapped + * 0xffffffc000200000 - 0xffffffc0003fffff (2MB, L2 slot [256]) + * Xen text, data, bss + * 0xffffffc000400000 - 0xffffffc0005fffff (2MB, L2 slot [256]) + * Fixmap: special-purpose 4K mapping slots + * 0xffffffc000600000 - 0xffffffc0009fffff (4MB, L2 slot [256]) + * Early boot mapping of FDT + * 0xffffffc000a00000 - 0xffffffc000bfffff (2MB, L2 slot [256]) + * Early relocation address, used when relocating Xen and later + * for livepatch vmap (if compiled in) + * 0xffffffc040000000 - 0xffffffc07fffffff (1GB, L2 slot [257]) + * VMAP: ioremap and early_ioremap + * 0xffffffc080000000 - 0xffffffc13fffffff (3GB, L2 slots [258..260]) + * Unmapped + * 0xffffffc140000000 - 0xffffffc1bfffffff (2GB, L2 slots [261..262]) + * Frametable: 48 bytes per page for 133GB of RAM + * 0xffffffc1c0000000 - 0xffffffe1bfffffff (128GB, L2 slots [263..390]) + * 1:1 direct mapping of RAM + * 0xffffffe1c0000000 - 0xffffffffffffffff (121GB, L2 slots [391..511]) + * Unmapped + */ + +#define L2_ENTRY_BITS 30 +#define L2_ENTRY_BYTES (_AC(1,UL) << L2_ENTRY_BITS) +#define L2_ADDR(_slot) \ + (((_AC(_slot, UL) >> 8) * _AC(0xffffff8000000000,UL)) | \ + (_AC(_slot, UL) << L2_ENTRY_BITS)) + +#define XEN_VIRT_START _AT(vaddr_t, L2_ADDR(256) + MB(2)) +#define HYPERVISOR_VIRT_START XEN_VIRT_START + +#define FRAMETABLE_VIRT_START _AT(vaddr_t, L2_ADDR(261)) + +#endif /* CONFIG_RISCV_64 */ + +#define STACK_ORDER 3 +#define STACK_SIZE (PAGE_SIZE << STACK_ORDER) + +#endif /* __RISCV_CONFIG_H__ */ +/* + * Local variables: + * mode: C + * c-file-style: "BSD" + * c-basic-offset: 4 + * indent-tabs-mode: nil + * End: + */ diff --git a/xen/include/asm-riscv/cpufeature.h b/xen/include/asm-riscv/cpufeature.h new file mode 100644 index 0000000000..15133ed63e --- /dev/null +++ b/xen/include/asm-riscv/cpufeature.h @@ -0,0 +1,17 @@ +#ifndef __ASM_RISCV_CPUFEATURE_H +#define __ASM_RISCV_CPUFEATURE_H + +static inline int cpu_nr_siblings(unsigned int cpu) +{ + return 1; +} + +#endif +/* + * Local variables: + * mode: C + * c-file-style: "BSD" + * c-basic-offset: 4 + * indent-tabs-mode: nil + * End: + */ diff --git a/xen/include/asm-riscv/csr.h b/xen/include/asm-riscv/csr.h new file mode 100644 index 0000000000..2c84efde99 --- /dev/null +++ b/xen/include/asm-riscv/csr.h @@ -0,0 +1,219 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (C) 2015 Regents of the University of California + */ + +#ifndef _ASM_RISCV_CSR_H +#define _ASM_RISCV_CSR_H + +#include <asm/asm.h> +#include <xen/const.h> + +/* Status register flags */ +#define SR_SIE _AC(0x00000002, UL) /* Supervisor Interrupt Enable */ +#define SR_MIE _AC(0x00000008, UL) /* Machine Interrupt Enable */ +#define SR_SPIE _AC(0x00000020, UL) /* Previous Supervisor IE */ +#define SR_MPIE _AC(0x00000080, UL) /* Previous Machine IE */ +#define SR_SPP _AC(0x00000100, UL) /* Previously Supervisor */ +#define SR_MPP _AC(0x00001800, UL) /* Previously Machine */ +#define SR_SUM _AC(0x00040000, UL) /* Supervisor User Memory Access */ + +#define SR_FS _AC(0x00006000, UL) /* Floating-point Status */ +#define SR_FS_OFF _AC(0x00000000, UL) +#define SR_FS_INITIAL _AC(0x00002000, UL) +#define SR_FS_CLEAN _AC(0x00004000, UL) +#define SR_FS_DIRTY _AC(0x00006000, UL) + +#define SR_XS _AC(0x00018000, UL) /* Extension Status */ +#define SR_XS_OFF _AC(0x00000000, UL) +#define SR_XS_INITIAL _AC(0x00008000, UL) +#define SR_XS_CLEAN _AC(0x00010000, UL) +#define SR_XS_DIRTY _AC(0x00018000, UL) + +#ifndef CONFIG_64BIT +#define SR_SD _AC(0x80000000, UL) /* FS/XS dirty */ +#else +#define SR_SD _AC(0x8000000000000000, UL) /* FS/XS dirty */ +#endif + +/* SATP flags */ +#ifndef CONFIG_64BIT +#define SATP_PPN _AC(0x003FFFFF, UL) +#define SATP_MODE_32 _AC(0x80000000, UL) +#define SATP_MODE SATP_MODE_32 +#else +#define SATP_PPN _AC(0x00000FFFFFFFFFFF, UL) +#define SATP_MODE_39 _AC(0x8000000000000000, UL) +#define SATP_MODE SATP_MODE_39 +#endif + +/* Exception cause high bit - is an interrupt if set */ +#define CAUSE_IRQ_FLAG (_AC(1, UL) << (__riscv_xlen - 1)) + +/* Interrupt causes (minus the high bit) */ +#define IRQ_S_SOFT 1 +#define IRQ_M_SOFT 3 +#define IRQ_S_TIMER 5 +#define IRQ_M_TIMER 7 +#define IRQ_S_EXT 9 +#define IRQ_M_EXT 11 + +/* Exception causes */ +#define EXC_INST_MISALIGNED 0 +#define EXC_INST_ACCESS 1 +#define EXC_BREAKPOINT 3 +#define EXC_LOAD_ACCESS 5 +#define EXC_STORE_ACCESS 7 +#define EXC_SYSCALL 8 +#define EXC_INST_PAGE_FAULT 12 +#define EXC_LOAD_PAGE_FAULT 13 +#define EXC_STORE_PAGE_FAULT 15 + +/* PMP configuration */ +#define PMP_R 0x01 +#define PMP_W 0x02 +#define PMP_X 0x04 +#define PMP_A 0x18 +#define PMP_A_TOR 0x08 +#define PMP_A_NA4 0x10 +#define PMP_A_NAPOT 0x18 +#define PMP_L 0x80 + +/* symbolic CSR names: */ +#define CSR_CYCLE 0xc00 +#define CSR_TIME 0xc01 +#define CSR_INSTRET 0xc02 +#define CSR_CYCLEH 0xc80 +#define CSR_TIMEH 0xc81 +#define CSR_INSTRETH 0xc82 + +#define CSR_SSTATUS 0x100 +#define CSR_SIE 0x104 +#define CSR_STVEC 0x105 +#define CSR_SCOUNTEREN 0x106 +#define CSR_SSCRATCH 0x140 +#define CSR_SEPC 0x141 +#define CSR_SCAUSE 0x142 +#define CSR_STVAL 0x143 +#define CSR_SIP 0x144 +#define CSR_SATP 0x180 + +#define CSR_MSTATUS 0x300 +#define CSR_MISA 0x301 +#define CSR_MIE 0x304 +#define CSR_MTVEC 0x305 +#define CSR_MSCRATCH 0x340 +#define CSR_MEPC 0x341 +#define CSR_MCAUSE 0x342 +#define CSR_MTVAL 0x343 +#define CSR_MIP 0x344 +#define CSR_PMPCFG0 0x3a0 +#define CSR_PMPADDR0 0x3b0 +#define CSR_MHARTID 0xf14 + +#ifdef CONFIG_RISCV_M_MODE +# define CSR_STATUS CSR_MSTATUS +# define CSR_IE CSR_MIE +# define CSR_TVEC CSR_MTVEC +# define CSR_SCRATCH CSR_MSCRATCH +# define CSR_EPC CSR_MEPC +# define CSR_CAUSE CSR_MCAUSE +# define CSR_TVAL CSR_MTVAL +# define CSR_IP CSR_MIP + +# define SR_IE SR_MIE +# define SR_PIE SR_MPIE +# define SR_PP SR_MPP + +# define RV_IRQ_SOFT IRQ_M_SOFT +# define RV_IRQ_TIMER IRQ_M_TIMER +# define RV_IRQ_EXT IRQ_M_EXT +#else /* CONFIG_RISCV_M_MODE */ +# define CSR_STATUS CSR_SSTATUS +# define CSR_IE CSR_SIE +# define CSR_TVEC CSR_STVEC +# define CSR_SCRATCH CSR_SSCRATCH +# define CSR_EPC CSR_SEPC +# define CSR_CAUSE CSR_SCAUSE +# define CSR_TVAL CSR_STVAL +# define CSR_IP CSR_SIP + +# define SR_IE SR_SIE +# define SR_PIE SR_SPIE +# define SR_PP SR_SPP + +# define RV_IRQ_SOFT IRQ_S_SOFT +# define RV_IRQ_TIMER IRQ_S_TIMER +# define RV_IRQ_EXT IRQ_S_EXT +#endif /* CONFIG_RISCV_M_MODE */ + +/* IE/IP (Supervisor/Machine Interrupt Enable/Pending) flags */ +#define IE_SIE (_AC(0x1, UL) << RV_IRQ_SOFT) +#define IE_TIE (_AC(0x1, UL) << RV_IRQ_TIMER) +#define IE_EIE (_AC(0x1, UL) << RV_IRQ_EXT) + +#ifndef __ASSEMBLY__ + +#define csr_swap(csr, val) \ +({ \ + unsigned long __v = (unsigned long)(val); \ + __asm__ __volatile__ ("csrrw %0, " __ASM_STR(csr) ", %1"\ + : "=r" (__v) : "rK" (__v) \ + : "memory"); \ + __v; \ +}) + +#define csr_read(csr) \ +({ \ + register unsigned long __v; \ + __asm__ __volatile__ ("csrr %0, " __ASM_STR(csr) \ + : "=r" (__v) : \ + : "memory"); \ + __v; \ +}) + +#define csr_write(csr, val) \ +({ \ + unsigned long __v = (unsigned long)(val); \ + __asm__ __volatile__ ("csrw " __ASM_STR(csr) ", %0" \ + : : "rK" (__v) \ + : "memory"); \ +}) + +#define csr_read_set(csr, val) \ +({ \ + unsigned long __v = (unsigned long)(val); \ + __asm__ __volatile__ ("csrrs %0, " __ASM_STR(csr) ", %1"\ + : "=r" (__v) : "rK" (__v) \ + : "memory"); \ + __v; \ +}) + +#define csr_set(csr, val) \ +({ \ + unsigned long __v = (unsigned long)(val); \ + __asm__ __volatile__ ("csrs " __ASM_STR(csr) ", %0" \ + : : "rK" (__v) \ + : "memory"); \ +}) + +#define csr_read_clear(csr, val) \ +({ \ + unsigned long __v = (unsigned long)(val); \ + __asm__ __volatile__ ("csrrc %0, " __ASM_STR(csr) ", %1"\ + : "=r" (__v) : "rK" (__v) \ + : "memory"); \ + __v; \ +}) + +#define csr_clear(csr, val) \ +({ \ + unsigned long __v = (unsigned long)(val); \ + __asm__ __volatile__ ("csrc " __ASM_STR(csr) ", %0" \ + : : "rK" (__v) \ + : "memory"); \ +}) + +#endif /* __ASSEMBLY__ */ + +#endif /* _ASM_RISCV_CSR_H */ diff --git a/xen/include/asm-riscv/current.h b/xen/include/asm-riscv/current.h new file mode 100644 index 0000000000..b9f319e9c4 --- /dev/null +++ b/xen/include/asm-riscv/current.h @@ -0,0 +1,47 @@ +#ifndef __ASM_CURRENT_H +#define __ASM_CURRENT_H + +#include <xen/page-size.h> +#include <xen/percpu.h> +#include <asm/processor.h> + +#ifndef __ASSEMBLY__ + +struct vcpu; + +/* Which VCPU is "current" on this PCPU. */ +DECLARE_PER_CPU(struct vcpu *, curr_vcpu); + +#define current (this_cpu(curr_vcpu)) +#define set_current(vcpu) do { current = (vcpu); } while (0) +#define get_cpu_current(cpu) (per_cpu(curr_vcpu, cpu)) + +/* Per-VCPU state that lives at the top of the stack */ +struct cpu_info { + struct cpu_user_regs guest_cpu_user_regs; + unsigned long elr; + uint32_t flags; +}; + +static inline struct cpu_info *get_cpu_info(void) +{ + register unsigned long sp asm ("sp"); + + return (struct cpu_info *)((sp & ~(STACK_SIZE - 1)) + + STACK_SIZE - sizeof(struct cpu_info)); +} + +#define guest_cpu_user_regs() (&get_cpu_info()->guest_cpu_user_regs) + +DECLARE_PER_CPU(unsigned int, cpu_id); + +#define get_processor_id() (this_cpu(cpu_id)) + +#define set_processor_id(id) do { \ + csr_write(CSR_SCRATCH, __per_cpu_offset[id]); \ + this_cpu(cpu_id) = (id); \ +} while(0) + +#endif /* __ASSEMBLY__ */ + +#endif /* __ASM_CURRENT_H */ diff --git a/xen/include/asm-riscv/debugger.h b/xen/include/asm-riscv/debugger.h new file mode 100644 index 0000000000..af4fc8a838 --- /dev/null +++ b/xen/include/asm-riscv/debugger.h @@ -0,0 +1,15 @@ +#ifndef __RISCV_DEBUGGER_H__ +#define __RISCV_DEBUGGER_H__ + +#define debugger_trap_fatal(v, r) (0) +#define debugger_trap_immediate() ((void) 0) + +#endif /* __RISCV_DEBUGGER_H__ */ +/* + * Local variables: + * mode: C + * c-file-style: "BSD" + * c-basic-offset: 4 + * indent-tabs-mode: nil + * End: + */ diff --git a/xen/include/asm-riscv/delay.h b/xen/include/asm-riscv/delay.h new file mode 100644 index 0000000000..181c54844c --- /dev/null +++ b/xen/include/asm-riscv/delay.h @@ -0,0 +1,15 @@ +#ifndef __RISCV_DELAY_H__ +#define __RISCV_DELAY_H__ + +extern void udelay(unsigned long usecs); + +#endif + +/* + * Local variables: + * mode: C + * c-file-style: "BSD" + * c-basic-offset: 4 + * indent-tabs-mode: nil + * End: + */ diff --git a/xen/include/asm-riscv/desc.h b/xen/include/asm-riscv/desc.h new file mode 100644 index 0000000000..a4d02d5eef --- /dev/null +++ b/xen/include/asm-riscv/desc.h @@ -0,0 +1,12 @@ +#ifndef __ARCH_DESC_H +#define __ARCH_DESC_H + +#endif /* __ARCH_DESC_H */ +/* + * Local variables: + * mode: C + * c-file-style: "BSD" + * c-basic-offset: 4 + * indent-tabs-mode: nil + * End: + */ diff --git a/xen/include/asm-riscv/device.h b/xen/include/asm-riscv/device.h new file mode 100644 index 0000000000..e38d2a9712 --- /dev/null +++ b/xen/include/asm-riscv/device.h @@ -0,0 +1,15 @@ +#ifndef __ASM_RISCV_DEVICE_H +#define __ASM_RISCV_DEVICE_H + +typedef struct device device_t; + +#endif /* __ASM_RISCV_DEVICE_H */ + +/* + * Local variables: + * mode: C + * c-file-style: "BSD" + * c-basic-offset: 4 + * indent-tabs-mode: nil + * End: + */ diff --git a/xen/include/asm-riscv/div64.h b/xen/include/asm-riscv/div64.h new file mode 100644 index 0000000000..0a88dd30ad --- /dev/null +++ b/xen/include/asm-riscv/div64.h @@ -0,0 +1,23 @@ +#ifndef __ASM_RISCV_DIV64 +#define __ASM_RISCV_DIV64 + +#include <asm/system.h> +#include <xen/types.h> + +# define do_div(n,base) ({ \ + uint32_t __base = (base); \ + uint32_t __rem; \ + __rem = ((uint64_t)(n)) % __base; \ + (n) = ((uint64_t)(n)) / __base; \ + __rem; \ + }) + +#endif +/* + * Local variables: + * mode: C + * c-file-style: "BSD" + * c-basic-offset: 4 + * indent-tabs-mode: nil + * End: + */ diff --git a/xen/include/asm-riscv/domain.h b/xen/include/asm-riscv/domain.h new file mode 100644 index 0000000000..ebf2c5bfe1 --- /dev/null +++ b/xen/include/asm-riscv/domain.h @@ -0,0 +1,50 @@ +#ifndef __ASM_DOMAIN_H__ +#define __ASM_DOMAIN_H__ + +#include <xen/cache.h> +#include <xen/sched.h> +#include <asm/page.h> +#include <asm/p2m.h> +#include <public/hvm/params.h> +#include <xen/serial.h> +#include <xen/rbtree.h> + +struct hvm_domain { + uint64_t params[HVM_NR_PARAMS]; +}; + +/* The hardware domain has always its memory direct mapped. */ +#define is_domain_direct_mapped(d) ((d) == hardware_domain) + +struct arch_domain { + struct hvm_domain hvm; +} __cacheline_aligned; + +struct arch_vcpu { +} __cacheline_aligned; + +void vcpu_show_execution_state(struct vcpu *); +void vcpu_show_registers(const struct vcpu *); + +static inline struct vcpu_guest_context *alloc_vcpu_guest_context(void) +{ + return (struct vcpu_guest_context *)0xdeadbeef; +} + +static inline void free_vcpu_guest_context(struct vcpu_guest_context *vgc) +{ +} + +static inline void arch_vcpu_block(struct vcpu *v) {} + +#endif /* __ASM_DOMAIN_H__ */ + +/* + * Local variables: + * mode: C + * c-file-style: "BSD" + * c-basic-offset: 4 + * tab-width: 4 + * indent-tabs-mode: nil + * End: + */ diff --git a/xen/include/asm-riscv/event.h b/xen/include/asm-riscv/event.h new file mode 100644 index 0000000000..88e10f414b --- /dev/null +++ b/xen/include/asm-riscv/event.h @@ -0,0 +1,42 @@ +#ifndef __ASM_EVENT_H__ +#define __ASM_EVENT_H__ + +#include <xen/errno.h> +#include <asm/domain.h> +#include <asm/bug.h> + +void vcpu_kick(struct vcpu *v); +void vcpu_mark_events_pending(struct vcpu *v); +void vcpu_update_evtchn_irq(struct vcpu *v); +void vcpu_block_unless_event_pending(struct vcpu *v); + +static inline int vcpu_event_delivery_is_enabled(struct vcpu *v) +{ + return 0; +} + +static inline int local_events_need_delivery(void) +{ + return 0; +} + +static inline void local_event_delivery_enable(void) +{ + +} + +/* No arch specific virq definition now. Default to global. */ +static inline bool arch_virq_is_global(unsigned int virq) +{ + return true; +} + +#endif +/* + * Local variables: + * mode: C + * c-file-style: "BSD" + * c-basic-offset: 4 + * indent-tabs-mode: nil + * End: + */ diff --git a/xen/include/asm-riscv/fence.h b/xen/include/asm-riscv/fence.h new file mode 100644 index 0000000000..2b443a3a48 --- /dev/null +++ b/xen/include/asm-riscv/fence.h @@ -0,0 +1,12 @@ +#ifndef _ASM_RISCV_FENCE_H +#define _ASM_RISCV_FENCE_H + +#ifdef CONFIG_SMP +#define RISCV_ACQUIRE_BARRIER "\tfence r , rw\n" +#define RISCV_RELEASE_BARRIER "\tfence rw, w\n" +#else +#define RISCV_ACQUIRE_BARRIER +#define RISCV_RELEASE_BARRIER +#endif + +#endif /* _ASM_RISCV_FENCE_H */ diff --git a/xen/include/asm-riscv/flushtlb.h b/xen/include/asm-riscv/flushtlb.h new file mode 100644 index 0000000000..7a4a4eee23 --- /dev/null +++ b/xen/include/asm-riscv/flushtlb.h @@ -0,0 +1,34 @@ +#ifndef __ASM_RISCV_FLUSHTLB_H__ +#define __ASM_RISCV_FLUSHTLB_H__ + +#include <xen/cpumask.h> + +/* + * Filter the given set of CPUs, removing those that definitely flushed their + * TLB since @page_timestamp. + */ +/* XXX lazy implementation just doesn't clear anything.... */ +static inline void tlbflush_filter(cpumask_t *mask, uint32_t page_timestamp) {} + +/* Returning 0 from tlbflush_current_time will always force a flush. */ +static inline uint32_t tlbflush_current_time(void) +{ + return 0; +} + +static inline void page_set_tlbflush_timestamp(struct page_info *page) +{ +} + +/* Flush specified CPUs' TLBs */ +void arch_flush_tlb_mask(const cpumask_t *mask); + +#endif /* __ASM_RISCV_FLUSHTLB_H__ */ +/* + * Local variables: + * mode: C + * c-file-style: "BSD" + * c-basic-offset: 4 + * indent-tabs-mode: nil + * End: + */ diff --git a/xen/include/asm-riscv/grant_table.h b/xen/include/asm-riscv/grant_table.h new file mode 100644 index 0000000000..8bcc05a60b --- /dev/null +++ b/xen/include/asm-riscv/grant_table.h @@ -0,0 +1,12 @@ +#ifndef __ASM_GRANT_TABLE_H__ +#define __ASM_GRANT_TABLE_H__ + +#endif /* __ASM_GRANT_TABLE_H__ */ +/* + * Local variables: + * mode: C + * c-file-style: "BSD" + * c-basic-offset: 4 + * indent-tabs-mode: nil + * End: + */ diff --git a/xen/include/asm-riscv/guest_access.h b/xen/include/asm-riscv/guest_access.h new file mode 100644 index 0000000000..61a16044b2 --- /dev/null +++ b/xen/include/asm-riscv/guest_access.h @@ -0,0 +1,41 @@ +#ifndef __ASM_RISCV_GUEST_ACCESS_H__ +#define __ASM_RISCV_GUEST_ACCESS_H__ + +#include <xen/errno.h> +#include <xen/sched.h> + +unsigned long raw_copy_to_guest(void *to, const void *from, unsigned len); +unsigned long raw_copy_to_guest_flush_dcache(void *to, const void *from, + unsigned len); +unsigned long raw_copy_from_guest(void *to, const void *from, unsigned len); +unsigned long raw_clear_guest(void *to, unsigned len); + +/* Copy data to guest physical address, then clean the region. */ +unsigned long copy_to_guest_phys_flush_dcache(struct domain *d, + paddr_t phys, + void *buf, + unsigned int len); + +int access_guest_memory_by_ipa(struct domain *d, paddr_t ipa, void *buf, + uint32_t size, bool is_write); + +#define __raw_copy_to_guest raw_copy_to_guest +#define __raw_copy_from_guest raw_copy_from_guest +#define __raw_clear_guest raw_clear_guest + +/* + * Pre-validate a guest handle. + * Allows use of faster __copy_* functions. + */ +#define guest_handle_okay(hnd, nr) (1) +#define guest_handle_subrange_okay(hnd, first, last) (1) + +#endif /* __ASM_RISCV_GUEST_ACCESS_H__ */ +/* + * Local variables: + * mode: C + * c-file-style: "BSD" + * c-basic-offset: 4 + * indent-tabs-mode: nil + * End: + */ diff --git a/xen/include/asm-riscv/guest_atomics.h b/xen/include/asm-riscv/guest_atomics.h new file mode 100644 index 0000000000..85e82e8c7c --- /dev/null +++ b/xen/include/asm-riscv/guest_atomics.h @@ -0,0 +1,60 @@ +/* + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2, or (at your option) + * any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#ifndef _RISCV_GUEST_ATOMICS_H +#define _RISCV_GUEST_ATOMICS_H + +#define guest_testop(name) \ +static inline int guest_##name(struct domain *d, int nr, volatile void *p) \ +{ \ + (void) d; \ + (void) nr; \ + (void) p; \ + \ + return 0; \ +} + +guest_testop(test_and_set_bit) +guest_testop(test_and_clear_bit) +guest_testop(test_and_change_bit) + +#undef guest_testop + +#define guest_bitop(name) \ +static inline void guest_##name(struct domain *d, int nr, volatile void *p) \ +{ \ + (void) d; \ + (void) nr; \ + (void) p; \ +} + +guest_bitop(set_bit) +guest_bitop(clear_bit) +guest_bitop(change_bit) + +#undef guest_bitop + +#define guest_test_bit(d, nr, p) ((void)(d), test_bit(nr, p)) + +#endif /* _RISCV_GUEST_ATOMICS_H */ +/* + * Local variables: + * mode: C + * c-file-style: "BSD" + * c-basic-offset: 4 + * indent-tabs-mode: nil + * End: + */ diff --git a/xen/include/asm-riscv/hardirq.h b/xen/include/asm-riscv/hardirq.h new file mode 100644 index 0000000000..67b6a673db --- /dev/null +++ b/xen/include/asm-riscv/hardirq.h @@ -0,0 +1,27 @@ +#ifndef __ASM_HARDIRQ_H +#define __ASM_HARDIRQ_H + +#include <xen/cache.h> +#include <xen/smp.h> + +typedef struct { + unsigned long __softirq_pending; + unsigned int __local_irq_count; +} __cacheline_aligned irq_cpustat_t; + +#include <xen/irq_cpustat.h> /* Standard mappings for irq_cpustat_t above */ + +#define in_irq() (local_irq_count(smp_processor_id()) != 0) + +#define irq_enter() (local_irq_count(smp_processor_id())++) +#define irq_exit() (local_irq_count(smp_processor_id())--) + +#endif /* __ASM_HARDIRQ_H */ +/* + * Local variables: + * mode: C + * c-file-style: "BSD" + * c-basic-offset: 4 + * indent-tabs-mode: nil + * End: + */ diff --git a/xen/include/asm-riscv/hypercall.h b/xen/include/asm-riscv/hypercall.h new file mode 100644 index 0000000000..8af474b5e2 --- /dev/null +++ b/xen/include/asm-riscv/hypercall.h @@ -0,0 +1,12 @@ +#ifndef __ASM_RISCV_HYPERCALL_H__ +#define __ASM_RISCV_HYPERCALL_H__ + +#endif /* __ASM_RISCV_HYPERCALL_H__ */ +/* + * Local variables: + * mode: C + * c-file-style: "BSD" + * c-basic-offset: 4 + * indent-tabs-mode: nil + * End: + */ diff --git a/xen/include/asm-riscv/init.h b/xen/include/asm-riscv/init.h new file mode 100644 index 0000000000..d72e62f0c9 --- /dev/null +++ b/xen/include/asm-riscv/init.h @@ -0,0 +1,42 @@ +#ifndef _XEN_ASM_INIT_H +#define _XEN_ASM_INIT_H + +#ifndef __ASSEMBLY__ + +struct init_info { + /* Pointer to the stack, used by head.S when entering in C */ + unsigned char *stack; + + /* Logical CPU ID, used by start_secondary */ + unsigned int cpuid; +}; + +#endif /* __ASSEMBLY__ */ + +/* For assembly routines */ +#define __HEAD .section ".head.text","ax" +#define __INIT .section ".init.text","ax" +#define __FINIT .previous + +#define __INITDATA .section ".init.data","aw",%progbits +#define __INITRODATA .section ".init.rodata","a",%progbits +#define __FINITDATA .previous + +#define __MEMINIT .section ".meminit.text", "ax" +#define __MEMINITDATA .section ".meminit.data", "aw" +#define __MEMINITRODATA .section ".meminit.rodata", "a" + +/* silence warnings when references are OK */ +#define __REF .section ".ref.text", "ax" +#define __REFDATA .section ".ref.data", "aw" +#define __REFCONST .section ".ref.rodata", "a" + +#endif /* _XEN_ASM_INIT_H */ +/* + * Local variables: + * mode: C + * c-file-style: "BSD" + * c-basic-offset: 4 + * indent-tabs-mode: nil + * End: + */ diff --git a/xen/include/asm-riscv/io.h b/xen/include/asm-riscv/io.h new file mode 100644 index 0000000000..92d17ebfa8 --- /dev/null +++ b/xen/include/asm-riscv/io.h @@ -0,0 +1,283 @@ +/* + * {read,write}{b,w,l,q} based on arch/arm64/include/asm/io.h + * which was based on arch/arm/include/io.h + * + * Copyright (C) 1996-2000 Russell King + * Copyright (C) 2012 ARM Ltd. + * Copyright (C) 2014 Regents of the University of California + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation, version 2. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#ifndef _ASM_RISCV_IO_H +#define _ASM_RISCV_IO_H + +#include <asm/byteorder.h> + +/* + * The RISC-V ISA doesn't yet specify how to query or modify PMAs, so we can't + * change the properties of memory regions. This should be fixed by the + * upcoming platform spec. + */ +#define ioremap_nocache(addr, size) ioremap((addr), (size)) +#define ioremap_wc(addr, size) ioremap((addr), (size)) +#define ioremap_wt(addr, size) ioremap((addr), (size)) + +/* Generic IO read/write. These perform native-endian accesses. */ +#define __raw_writeb __raw_writeb +static inline void __raw_writeb(u8 val, volatile void __iomem *addr) +{ + asm volatile("sb %0, 0(%1)" : : "r" (val), "r" (addr)); +} + +#define __raw_writew __raw_writew +static inline void __raw_writew(u16 val, volatile void __iomem *addr) +{ + asm volatile("sh %0, 0(%1)" : : "r" (val), "r" (addr)); +} + +#define __raw_writel __raw_writel +static inline void __raw_writel(u32 val, volatile void __iomem *addr) +{ + asm volatile("sw %0, 0(%1)" : : "r" (val), "r" (addr)); +} + +#ifdef CONFIG_64BIT +#define __raw_writeq __raw_writeq +static inline void __raw_writeq(u64 val, volatile void __iomem *addr) +{ + asm volatile("sd %0, 0(%1)" : : "r" (val), "r" (addr)); +} +#endif + +#define __raw_readb __raw_readb +static inline u8 __raw_readb(const volatile void __iomem *addr) +{ + u8 val; + + asm volatile("lb %0, 0(%1)" : "=r" (val) : "r" (addr)); + return val; +} + +#define __raw_readw __raw_readw +static inline u16 __raw_readw(const volatile void __iomem *addr) +{ + u16 val; + + asm volatile("lh %0, 0(%1)" : "=r" (val) : "r" (addr)); + return val; +} + +#define __raw_readl __raw_readl +static inline u32 __raw_readl(const volatile void __iomem *addr) +{ + u32 val; + + asm volatile("lw %0, 0(%1)" : "=r" (val) : "r" (addr)); + return val; +} + +#ifdef CONFIG_64BIT +#define __raw_readq __raw_readq +static inline u64 __raw_readq(const volatile void __iomem *addr) +{ + u64 val; + + asm volatile("ld %0, 0(%1)" : "=r" (val) : "r" (addr)); + return val; +} +#endif + +/* + * Unordered I/O memory access primitives. These are even more relaxed than + * the relaxed versions, as they don't even order accesses between successive + * operations to the I/O regions. + */ +#define readb_cpu(c) ({ u8 __r = __raw_readb(c); __r; }) +#define readw_cpu(c) ({ u16 __r = le16_to_cpu((__force __le16)__raw_readw(c)); __r; }) +#define readl_cpu(c) ({ u32 __r = le32_to_cpu((__force __le32)__raw_readl(c)); __r; }) + +#define writeb_cpu(v,c) ((void)__raw_writeb((v),(c))) +#define writew_cpu(v,c) ((void)__raw_writew((__force u16)cpu_to_le16(v),(c))) +#define writel_cpu(v,c) ((void)__raw_writel((__force u32)cpu_to_le32(v),(c))) + +#ifdef CONFIG_64BIT +#define readq_cpu(c) ({ u64 __r = le64_to_cpu((__force __le64)__raw_readq(c)); __r; }) +#define writeq_cpu(v,c) ((void)__raw_writeq((__force u64)cpu_to_le64(v),(c))) +#endif + +/* + * Relaxed I/O memory access primitives. These follow the Device memory + * ordering rules but do not guarantee any ordering relative to Normal memory + * accesses. These are defined to order the indicated access (either a read or + * write) with all other I/O memory accesses. Since the platform specification + * defines that all I/O regions are strongly ordered on channel 2, no explicit + * fences are required to enforce this ordering. + */ +/* FIXME: These are now the same as asm-generic */ +#define __io_rbr() do {} while (0) +#define __io_rar() do {} while (0) +#define __io_rbw() do {} while (0) +#define __io_raw() do {} while (0) + +#define readb_relaxed(c) ({ u8 __v; __io_rbr(); __v = readb_cpu(c); __io_rar(); __v; }) +#define readw_relaxed(c) ({ u16 __v; __io_rbr(); __v = readw_cpu(c); __io_rar(); __v; }) +#define readl_relaxed(c) ({ u32 __v; __io_rbr(); __v = readl_cpu(c); __io_rar(); __v; }) + +#define writeb_relaxed(v,c) ({ __io_rbw(); writeb_cpu((v),(c)); __io_raw(); }) +#define writew_relaxed(v,c) ({ __io_rbw(); writew_cpu((v),(c)); __io_raw(); }) +#define writel_relaxed(v,c) ({ __io_rbw(); writel_cpu((v),(c)); __io_raw(); }) + +#ifdef CONFIG_64BIT +#define readq_relaxed(c) ({ u64 __v; __io_rbr(); __v = readq_cpu(c); __io_rar(); __v; }) +#define writeq_relaxed(v,c) ({ __io_rbw(); writeq_cpu((v),(c)); __io_raw(); }) +#endif + +/* + * I/O memory access primitives. Reads are ordered relative to any + * following Normal memory access. Writes are ordered relative to any prior + * Normal memory access. The memory barriers here are necessary as RISC-V + * doesn't define any ordering between the memory space and the I/O space. + */ +#define __io_br() do {} while (0) +#define __io_ar(v) __asm__ __volatile__ ("fence i,r" : : : "memory"); +#define __io_bw() __asm__ __volatile__ ("fence w,o" : : : "memory"); +#define __io_aw() do { } while (0) + +#define readb(c) ({ u8 __v; __io_br(); __v = readb_cpu(c); __io_ar(__v); __v; }) +#define readw(c) ({ u16 __v; __io_br(); __v = readw_cpu(c); __io_ar(__v); __v; }) +#define readl(c) ({ u32 __v; __io_br(); __v = readl_cpu(c); __io_ar(__v); __v; }) + +#define writeb(v,c) ({ __io_bw(); writeb_cpu((v),(c)); __io_aw(); }) +#define writew(v,c) ({ __io_bw(); writew_cpu((v),(c)); __io_aw(); }) +#define writel(v,c) ({ __io_bw(); writel_cpu((v),(c)); __io_aw(); }) + +#ifdef CONFIG_64BIT +#define readq(c) ({ u64 __v; __io_br(); __v = readq_cpu(c); __io_ar(__v); __v; }) +#define writeq(v,c) ({ __io_bw(); writeq_cpu((v),(c)); __io_aw(); }) +#endif + +/* + * Emulation routines for the port-mapped IO space used by some PCI drivers. + * These are defined as being "fully synchronous", but also "not guaranteed to + * be fully ordered with respect to other memory and I/O operations". We're + * going to be on the safe side here and just make them: + * - Fully ordered WRT each other, by bracketing them with two fences. The + * outer set contains both I/O so inX is ordered with outX, while the inner just + * needs the type of the access (I for inX and O for outX). + * - Ordered in the same manner as readX/writeX WRT memory by subsuming their + * fences. + * - Ordered WRT timer reads, so udelay and friends don't get elided by the + * implementation. + * Note that there is no way to actually enforce that outX is a non-posted + * operation on RISC-V, but hopefully the timer ordering constraint is + * sufficient to ensure this works sanely on controllers that support I/O + * writes. + */ +#define __io_pbr() __asm__ __volatile__ ("fence io,i" : : : "memory"); +#define __io_par(v) __asm__ __volatile__ ("fence i,ior" : : : "memory"); +#define __io_pbw() __asm__ __volatile__ ("fence iow,o" : : : "memory"); +#define __io_paw() __asm__ __volatile__ ("fence o,io" : : : "memory"); + +#define inb(c) ({ u8 __v; __io_pbr(); __v = readb_cpu((void*)(PCI_IOBASE + (c))); __io_par(__v); __v; }) +#define inw(c) ({ u16 __v; __io_pbr(); __v = readw_cpu((void*)(PCI_IOBASE + (c))); __io_par(__v); __v; }) +#define inl(c) ({ u32 __v; __io_pbr(); __v = readl_cpu((void*)(PCI_IOBASE + (c))); __io_par(__v); __v; }) + +#define outb(v,c) ({ __io_pbw(); writeb_cpu((v),(void*)(PCI_IOBASE + (c))); __io_paw(); }) +#define outw(v,c) ({ __io_pbw(); writew_cpu((v),(void*)(PCI_IOBASE + (c))); __io_paw(); }) +#define outl(v,c) ({ __io_pbw(); writel_cpu((v),(void*)(PCI_IOBASE + (c))); __io_paw(); }) + +#ifdef CONFIG_64BIT +#define inq(c) ({ u64 __v; __io_pbr(); __v = readq_cpu((void*)(c)); __io_par(__v); __v; }) +#define outq(v,c) ({ __io_pbw(); writeq_cpu((v),(void*)(c)); __io_paw(); }) +#endif + +/* + * Accesses from a single hart to a single I/O address must be ordered. This + * allows us to use the raw read macros, but we still need to fence before and + * after the block to ensure ordering WRT other macros. These are defined to + * perform host-endian accesses so we use __raw instead of __cpu. + */ +#define __io_reads_ins(port, ctype, len, bfence, afence) \ + static inline void __ ## port ## len(const volatile void __iomem *addr, \ + void *buffer, \ + unsigned int count) \ + { \ + bfence; \ + if (count) { \ + ctype *buf = buffer; \ + \ + do { \ + ctype x = __raw_read ## len(addr); \ + *buf++ = x; \ + } while (--count); \ + } \ + afence; \ + } + +#define __io_writes_outs(port, ctype, len, bfence, afence) \ + static inline void __ ## port ## len(volatile void __iomem *addr, \ + const void *buffer, \ + unsigned int count) \ + { \ + bfence; \ + if (count) { \ + const ctype *buf = buffer; \ + \ + do { \ + __raw_write ## len(*buf++, addr); \ + } while (--count); \ + } \ + afence; \ + } + +__io_reads_ins(reads, u8, b, __io_br(), __io_ar(addr)) +__io_reads_ins(reads, u16, w, __io_br(), __io_ar(addr)) +__io_reads_ins(reads, u32, l, __io_br(), __io_ar(addr)) +#define readsb(addr, buffer, count) __readsb(addr, buffer, count) +#define readsw(addr, buffer, count) __readsw(addr, buffer, count) +#define readsl(addr, buffer, count) __readsl(addr, buffer, count) + +__io_reads_ins(ins, u8, b, __io_pbr(), __io_par(addr)) +__io_reads_ins(ins, u16, w, __io_pbr(), __io_par(addr)) +__io_reads_ins(ins, u32, l, __io_pbr(), __io_par(addr)) +#define insb(addr, buffer, count) __insb((void __iomem *)(long)addr, buffer, count) +#define insw(addr, buffer, count) __insw((void __iomem *)(long)addr, buffer, count) +#define insl(addr, buffer, count) __insl((void __iomem *)(long)addr, buffer, count) + +__io_writes_outs(writes, u8, b, __io_bw(), __io_aw()) +__io_writes_outs(writes, u16, w, __io_bw(), __io_aw()) +__io_writes_outs(writes, u32, l, __io_bw(), __io_aw()) +#define writesb(addr, buffer, count) __writesb(addr, buffer, count) +#define writesw(addr, buffer, count) __writesw(addr, buffer, count) +#define writesl(addr, buffer, count) __writesl(addr, buffer, count) + +__io_writes_outs(outs, u8, b, __io_pbw(), __io_paw()) +__io_writes_outs(outs, u16, w, __io_pbw(), __io_paw()) +__io_writes_outs(outs, u32, l, __io_pbw(), __io_paw()) +#define outsb(addr, buffer, count) __outsb((void __iomem *)(long)addr, buffer, count) +#define outsw(addr, buffer, count) __outsw((void __iomem *)(long)addr, buffer, count) +#define outsl(addr, buffer, count) __outsl((void __iomem *)(long)addr, buffer, count) + +#ifdef CONFIG_64BIT +__io_reads_ins(reads, u64, q, __io_br(), __io_ar(addr)) +#define readsq(addr, buffer, count) __readsq(addr, buffer, count) + +__io_reads_ins(ins, u64, q, __io_pbr(), __io_par(addr)) +#define insq(addr, buffer, count) __insq((void __iomem *)addr, buffer, count) + +__io_writes_outs(writes, u64, q, __io_bw(), __io_aw()) +#define writesq(addr, buffer, count) __writesq(addr, buffer, count) + +__io_writes_outs(outs, u64, q, __io_pbr(), __io_paw()) +#define outsq(addr, buffer, count) __outsq((void __iomem *)addr, buffer, count) +#endif + +#endif /* _ASM_RISCV_IO_H */ diff --git a/xen/include/asm-riscv/iocap.h b/xen/include/asm-riscv/iocap.h new file mode 100644 index 0000000000..e38a7ff3dc --- /dev/null +++ b/xen/include/asm-riscv/iocap.h @@ -0,0 +1,13 @@ +#ifndef __RISCV_IOCAP_H__ +#define __RISCV_IOCAP_H__ + +#endif + +/* + * Local variables: + * mode: C + * c-file-style: "BSD" + * c-basic-offset: 4 + * indent-tabs-mode: nil + * End: + */ diff --git a/xen/include/asm-riscv/iommu.h b/xen/include/asm-riscv/iommu.h new file mode 100644 index 0000000000..c4f24574ec --- /dev/null +++ b/xen/include/asm-riscv/iommu.h @@ -0,0 +1,46 @@ +/****************************************************************************** + * + * Copyright 2019 (C) Alistair Francis <alistair.francis@xxxxxxx> + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to + * deal in the Software without restriction, including without limitation the + * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or + * sell copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + * DEALINGS IN THE SOFTWARE. + * + */ + +#ifndef __ARCH_RISCV_IOMMU_H__ +#define __ARCH_RISCV_IOMMU_H__ + +struct arch_iommu +{ + /* Private information for the IOMMU drivers */ + void *priv; +}; + +const struct iommu_ops *iommu_get_ops(void); +void iommu_set_ops(const struct iommu_ops *ops); + +#endif /* __ARCH_RISCV_IOMMU_H__ */ + +/* + * Local variables: + * mode: C + * c-file-style: "BSD" + * c-basic-offset: 4 + * indent-tabs-mode: nil + * End: + */ diff --git a/xen/include/asm-riscv/irq.h b/xen/include/asm-riscv/irq.h new file mode 100644 index 0000000000..ae17872d4d --- /dev/null +++ b/xen/include/asm-riscv/irq.h @@ -0,0 +1,58 @@ +#ifndef _ASM_HW_IRQ_H +#define _ASM_HW_IRQ_H + +#include <public/device_tree_defs.h> + +/* + * These defines correspond to the Xen internal representation of the + * IRQ types. We choose to make them the same as the existing device + * tree definitions for convenience. + */ +#define IRQ_TYPE_NONE DT_IRQ_TYPE_NONE +#define IRQ_TYPE_EDGE_RISING DT_IRQ_TYPE_EDGE_RISING +#define IRQ_TYPE_EDGE_FALLING DT_IRQ_TYPE_EDGE_FALLING +#define IRQ_TYPE_EDGE_BOTH DT_IRQ_TYPE_EDGE_BOTH +#define IRQ_TYPE_LEVEL_HIGH DT_IRQ_TYPE_LEVEL_HIGH +#define IRQ_TYPE_LEVEL_LOW DT_IRQ_TYPE_LEVEL_LOW +#define IRQ_TYPE_LEVEL_MASK DT_IRQ_TYPE_LEVEL_MASK +#define IRQ_TYPE_SENSE_MASK DT_IRQ_TYPE_SENSE_MASK +#define IRQ_TYPE_INVALID DT_IRQ_TYPE_INVALID + +#define NR_LOCAL_IRQS 32 +#define NR_IRQS 1024 + +typedef struct { +} vmask_t; + +struct arch_pirq +{ +}; + +struct arch_irq_desc { +}; + +struct irq_desc; + +struct irq_desc *__irq_to_desc(int irq); + +#define irq_to_desc(irq) __irq_to_desc(irq) + +void arch_move_irqs(struct vcpu *v); + +#define domain_pirq_to_irq(d, pirq) (pirq) + +extern const unsigned int nr_irqs; +#define nr_static_irqs NR_IRQS +#define arch_hwdom_irqs(domid) NR_IRQS + +#define arch_evtchn_bind_pirq(d, pirq) ((void)((d) + (pirq))) + +#endif /* _ASM_HW_IRQ_H */ +/* + * Local variables: + * mode: C + * c-file-style: "BSD" + * c-basic-offset: 4 + * indent-tabs-mode: nil + * End: + */ diff --git a/xen/include/asm-riscv/mem_access.h b/xen/include/asm-riscv/mem_access.h new file mode 100644 index 0000000000..8348a04a53 --- /dev/null +++ b/xen/include/asm-riscv/mem_access.h @@ -0,0 +1,4 @@ +#ifndef __RISCV_MEM_ACCESS_H__ +#define __RISCV_MEM_ACCESS_H__ + +#endif diff --git a/xen/include/asm-riscv/mm.h b/xen/include/asm-riscv/mm.h new file mode 100644 index 0000000000..e1972a8c20 --- /dev/null +++ b/xen/include/asm-riscv/mm.h @@ -0,0 +1,246 @@ +#ifndef __ARCH_RISCV_MM__ +#define __ARCH_RISCV_MM__ + +#include <xen/errno.h> +#include <asm/page.h> +#include <public/xen.h> + +extern unsigned long max_page; +extern unsigned long total_pages; +extern unsigned long frametable_base_mfn; +extern mfn_t xenheap_mfn_start; +extern mfn_t xenheap_mfn_end; +extern vaddr_t xenheap_virt_end; +extern vaddr_t xenheap_virt_start; + +/* Per-page-frame information. */ +struct page_info { + /* Each frame can be threaded onto a doubly-linked list. */ + struct page_list_entry list; + + /* Reference count and various PGC_xxx flags and fields. */ + unsigned long count_info; + + /* Context-dependent fields follow... */ + union { + /* Page is in use: ((count_info & PGC_count_mask) != 0). */ + struct { + /* Type reference count and various PGT_xxx flags and fields. */ + unsigned long type_info; + } inuse; + /* Page is on a free list: ((count_info & PGC_count_mask) == 0). */ + union { + struct { + /* + * Index of the first *possibly* unscrubbed page in the buddy. + * One more bit than maximum possible order to accommodate + * INVALID_DIRTY_IDX. + */ +#define INVALID_DIRTY_IDX ((1UL << (MAX_ORDER + 1)) - 1) + unsigned long first_dirty:MAX_ORDER + 1; + + /* Do TLBs need flushing for safety before next page use? */ + bool need_tlbflush:1; + +#define BUDDY_NOT_SCRUBBING 0 +#define BUDDY_SCRUBBING 1 +#define BUDDY_SCRUB_ABORT 2 + unsigned long scrub_state:2; + }; + + unsigned long val; + } free; + } u; + + union { + /* Page is in use, but not as a shadow. */ + struct { + /* Owner of this page (zero if page is anonymous). */ + struct domain *domain; + } inuse; + + /* Page is on a free list. */ + struct { + /* Order-size of the free chunk this page is the head of. */ + unsigned int order; + } free; + } v; + + union { + /* + * Timestamp from 'TLB clock', used to avoid extra safety flushes. + * Only valid for: a) free pages, and b) pages with zero type count + */ + u32 tlbflush_timestamp; + }; +}; + +#define PFN_ORDER(_pfn) ((_pfn)->v.free.order) + +#define PG_shift(idx) (BITS_PER_LONG - (idx)) +#define PG_mask(x, idx) (x ## UL << PG_shift(idx)) + +#define PGT_writable_page PG_mask(1, 1) /* has writable mappings? */ + +/* Count of uses of this frame as its current type. */ +#define PGT_count_width PG_shift(2) +#define PGT_count_mask ((1UL<<PGT_count_width)-1) + +/* Cleared when the owning guest 'frees' this page. */ +#define _PGC_allocated PG_shift(1) +#define PGC_allocated PG_mask(1, 1) + +/* Page is Xen heap? */ +#define _PGC_xen_heap PG_shift(2) +#define PGC_xen_heap PG_mask(1, 2) + +/* Page is broken? */ +#define _PGC_broken PG_shift(7) +#define PGC_broken PG_mask(1, 7) + +/* Mutually-exclusive page states: { inuse, offlining, offlined, free }. */ +#define PGC_state PG_mask(3, 9) +#define PGC_state_inuse PG_mask(0, 9) +#define PGC_state_offlining PG_mask(1, 9) +#define PGC_state_offlined PG_mask(2, 9) +#define PGC_state_free PG_mask(3, 9) +#define page_state_is(pg, st) (((pg)->count_info & PGC_state) == PGC_state_##st) + +/* Page is not reference counted */ +#define _PGC_extra PG_shift(10) +#define PGC_extra PG_mask(1, 10) + +/* Count of references to this frame. */ +#define PGC_count_width PG_shift(9) +#define PGC_count_mask ((1UL<<PGC_count_width)-1) + +/* + * Page needs to be scrubbed. Since this bit can only be set on a page that is + * free (i.e. in PGC_state_free) we can reuse PGC_allocated bit. + */ +#define _PGC_need_scrub _PGC_allocated +#define PGC_need_scrub PGC_allocated + +#define is_xen_heap_page(page) ((page)->count_info & PGC_xen_heap) +#define is_xen_heap_mfn(mfn) \ + (mfn_valid(_mfn(mfn)) && is_xen_heap_page(mfn_to_page(_mfn(mfn)))) + +#define is_xen_fixed_mfn(mfn) \ + ((mfn_to_maddr(mfn) >= virt_to_maddr(&_start)) && \ + (mfn_to_maddr(mfn) <= virt_to_maddr(&_end))) + +#define page_get_owner(_p) (_p)->v.inuse.domain +#define page_set_owner(_p,_d) ((_p)->v.inuse.domain = (_d)) + +#define maddr_get_owner(ma) (page_get_owner(maddr_to_page((ma)))) + +#define mfn_valid(mfn) ({ \ + unsigned long mfn_ = mfn_x(mfn); \ + likely(mfn_ >= frametable_base_mfn && mfn_ < max_page); \ +}) + +/* Convert between machine frame numbers and page-info structures. */ +#define frame_table ((struct page_info *)FRAMETABLE_VIRT_START) +#define mfn_to_page(mfn) \ + (frame_table + (mfn_x(mfn) - frametable_base_mfn)) +#define page_to_mfn(pg) \ + _mfn(((unsigned long)((pg) - frame_table) + frametable_base_mfn)) + +/* Convert between machine addresses and page-info structures. */ +#define maddr_to_page(ma) mfn_to_page(maddr_to_mfn(ma)) +#define page_to_maddr(pg) (mfn_to_maddr(page_to_mfn(pg))) + +/* Convert between frame number and address formats. */ +#define pfn_to_paddr(pfn) ((paddr_t)(pfn) << PAGE_SHIFT) +#define paddr_to_pfn(pa) ((unsigned long)((pa) >> PAGE_SHIFT)) +#define mfn_to_maddr(mfn) pfn_to_paddr(mfn_x(mfn)) +#define maddr_to_mfn(ma) _mfn(paddr_to_pfn(ma)) +#define vmap_to_mfn(va) maddr_to_mfn(virt_to_maddr((vaddr_t)va)) +#define vmap_to_page(va) mfn_to_page(vmap_to_mfn(va)) + +static inline void *maddr_to_virt(paddr_t ma) +{ + return (void *)0xdeadbeef; +} + +static inline paddr_t __virt_to_maddr(vaddr_t va) +{ + return 0; +} + +#define virt_to_maddr(va) __virt_to_maddr((vaddr_t) (va)) + +/* Convert between Xen-heap virtual addresses and machine addresses. */ +#define __pa(x) (virt_to_maddr(x)) +#define __va(x) (maddr_to_virt(x)) + +/* Convert between Xen-heap virtual addresses and machine frame numbers. */ +#define __virt_to_mfn(va) (virt_to_maddr(va) >> PAGE_SHIFT) +#define __mfn_to_virt(mfn) (maddr_to_virt((paddr_t)(mfn) << PAGE_SHIFT)) + +/* + * We define non-underscored wrappers for above conversion functions. + * These are overriden in various source files while underscored version + * remain intact. + */ +#define virt_to_mfn(va) __virt_to_mfn(va) +#define mfn_to_virt(mfn) __mfn_to_virt(mfn) + +/* Convert between Xen-heap virtual addresses and page-info structures. */ +static inline struct page_info *virt_to_page(const void *v) +{ + return (void *)0xdeadbeef; +} + +static inline void *page_to_virt(const struct page_info *pg) +{ + return (void *)0xdeadbeef; +} + +#define domain_set_alloc_bitsize(d) ((void)0) +#define domain_clamp_alloc_bitsize(d, b) (b) + +/* + * RISC-V does not have an M2P, but common code expects a handful of + * M2P-related defines and functions. Provide dummy versions of these. + */ +#define INVALID_M2P_ENTRY (~0UL) +#define SHARED_M2P_ENTRY (~0UL - 1UL) +#define SHARED_M2P(_e) ((_e) == SHARED_M2P_ENTRY) + +/* Xen always owns P2M on RISC-V */ +#define set_gpfn_from_mfn(mfn, pfn) do { (void) (mfn), (void)(pfn); } while (0) +#define mfn_to_gmfn(_d, mfn) (mfn) + +/* Arch-specific portion of memory_op hypercall. */ +long arch_memory_op(int op, XEN_GUEST_HANDLE_PARAM(void) arg); + +extern void put_page_type(struct page_info *page); + +static inline void put_page_and_type(struct page_info *page) +{ +} + +int guest_physmap_mark_populate_on_demand(struct domain *d, unsigned long gfn, + unsigned int order); + +unsigned long domain_get_maximum_gpfn(struct domain *d); + +/* + * On RISC-V, all the RAM is currently direct mapped in Xen. + * Hence return always true. + */ +static inline bool arch_mfn_in_directmap(unsigned long mfn) +{ + return true; +} + +#endif /* __ARCH_RISCV_MM__ */ +/* + * Local variables: + * mode: C + * c-file-style: "BSD" + * c-basic-offset: 4 + * indent-tabs-mode: nil + * End: + */ diff --git a/xen/include/asm-riscv/monitor.h b/xen/include/asm-riscv/monitor.h new file mode 100644 index 0000000000..e77d21dba4 --- /dev/null +++ b/xen/include/asm-riscv/monitor.h @@ -0,0 +1,65 @@ +/* + * include/asm-RISCV/monitor.h + * + * Arch-specific monitor_op domctl handler. + * + * Copyright (c) 2015 Tamas K Lengyel (tamas@xxxxxxxxxxxxx) + * Copyright (c) 2016, Bitdefender S.R.L. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public + * License v2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public + * License along with this program; If not, see <http://www.gnu.org/licenses/>. + */ + +#ifndef __ASM_RISCV_MONITOR_H__ +#define __ASM_RISCV_MONITOR_H__ + +#include <xen/sched.h> +#include <public/domctl.h> + +static inline +void arch_monitor_allow_userspace(struct domain *d, bool allow_userspace) +{ +} + +static inline +int arch_monitor_domctl_op(struct domain *d, struct xen_domctl_monitor_op *mop) +{ + /* No arch-specific monitor ops on RISCV. */ + return -EOPNOTSUPP; +} + +int arch_monitor_domctl_event(struct domain *d, + struct xen_domctl_monitor_op *mop); + +static inline +int arch_monitor_init_domain(struct domain *d) +{ + /* No arch-specific domain initialization on RISCV. */ + return 0; +} + +static inline +void arch_monitor_cleanup_domain(struct domain *d) +{ + /* No arch-specific domain cleanup on RISCV. */ +} + +static inline uint32_t arch_monitor_get_capabilities(struct domain *d) +{ + uint32_t capabilities = 0; + + return capabilities; +} + +int monitor_smc(void); + +#endif /* __ASM_RISCV_MONITOR_H__ */ diff --git a/xen/include/asm-riscv/nospec.h b/xen/include/asm-riscv/nospec.h new file mode 100644 index 0000000000..55087fa831 --- /dev/null +++ b/xen/include/asm-riscv/nospec.h @@ -0,0 +1,25 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Copyright 2018 Amazon.com, Inc. or its affiliates. All Rights Reserved. */ + +#ifndef _ASM_RISCV_NOSPEC_H +#define _ASM_RISCV_NOSPEC_H + +static inline bool evaluate_nospec(bool condition) +{ + return condition; +} + +static inline void block_speculation(void) +{ +} + +#endif /* _ASM_RISCV_NOSPEC_H */ + +/* + * Local variables: + * mode: C + * c-file-style: "BSD" + * c-basic-offset: 4 + * indent-tabs-mode: nil + * End: + */ diff --git a/xen/include/asm-riscv/numa.h b/xen/include/asm-riscv/numa.h new file mode 100644 index 0000000000..52bdfbc16b --- /dev/null +++ b/xen/include/asm-riscv/numa.h @@ -0,0 +1,41 @@ +#ifndef __ARCH_RISCV_NUMA_H +#define __ARCH_RISCV_NUMA_H + +#include <xen/mm.h> + +typedef u8 nodeid_t; + +/* Fake one node for now. See also node_online_map. */ +#define cpu_to_node(cpu) 0 +#define node_to_cpumask(node) (cpu_online_map) + +static inline __attribute__((pure)) nodeid_t phys_to_nid(paddr_t addr) +{ + return 0; +} + +/* + * TODO: make first_valid_mfn static when NUMA is supported on RISCV, this + * is required because the dummy helpers are using it. + */ +extern mfn_t first_valid_mfn; + +/* XXX: implement NUMA support */ +#define node_spanned_pages(nid) (max_page - mfn_x(first_valid_mfn)) +#define node_start_pfn(nid) (mfn_x(first_valid_mfn)) +#define __node_distance(a, b) (20) + +static inline unsigned int arch_get_dma_bitsize(void) +{ + return 32; +} + +#endif /* __ARCH_RISCV_NUMA_H */ +/* + * Local variables: + * mode: C + * c-file-style: "BSD" + * c-basic-offset: 4 + * indent-tabs-mode: nil + * End: + */ diff --git a/xen/include/asm-riscv/p2m.h b/xen/include/asm-riscv/p2m.h new file mode 100644 index 0000000000..1bb2009d53 --- /dev/null +++ b/xen/include/asm-riscv/p2m.h @@ -0,0 +1,218 @@ +#ifndef _XEN_P2M_H +#define _XEN_P2M_H + +#include <xen/mm.h> +#include <xen/mem_access.h> +#include <xen/errno.h> + +struct domain; + +extern void memory_type_changed(struct domain *); + +/* Per-p2m-table state */ +struct p2m_domain { +}; + +typedef enum { + p2m_invalid = 0 +} p2m_type_t; + +/* All common type definitions should live ahead of this inclusion. */ +#ifdef _XEN_P2M_COMMON_H +# error "xen/p2m-common.h should not be included directly" +#endif +#include <xen/p2m-common.h> + +static inline bool arch_acquire_resource_check(struct domain *d) +{ + return true; +} + +static inline +void p2m_altp2m_check(struct vcpu *v, uint16_t idx) +{ +} + +/* Second stage paging setup, to be called on all CPUs */ +void setup_virt_paging(void); + +/* Init the datastructures for later use by the p2m code */ +int p2m_init(struct domain *d); + +/* Return all the p2m resources to Xen. */ +void p2m_teardown(struct domain *d); + +/* Remove mapping refcount on each mapping page in the p2m */ +int relinquish_p2m_mapping(struct domain *d); + +/* Context switch */ +void p2m_save_state(struct vcpu *p); +void p2m_restore_state(struct vcpu *n); + +/* Print debugging/statistial info about a domain's p2m */ +void p2m_dump_info(struct domain *d); + +static inline void p2m_write_lock(struct p2m_domain *p2m) +{ +} + +void p2m_write_unlock(struct p2m_domain *p2m); + +static inline void p2m_read_lock(struct p2m_domain *p2m) +{ +} + +static inline void p2m_read_unlock(struct p2m_domain *p2m) +{ +} + +static inline int p2m_is_locked(struct p2m_domain *p2m) +{ + return 0; +} + +static inline int p2m_is_write_locked(struct p2m_domain *p2m) +{ + return 0; +} + +void p2m_tlb_flush_sync(struct p2m_domain *p2m); + +/* Look up the MFN corresponding to a domain's GFN. */ +mfn_t p2m_lookup(struct domain *d, gfn_t gfn, p2m_type_t *t); + +/* + * Get details of a given gfn. + * The P2M lock should be taken by the caller. + */ +mfn_t p2m_get_entry(struct p2m_domain *p2m, gfn_t gfn, + p2m_type_t *t, p2m_access_t *a, + unsigned int *page_order, + bool *valid); + +/* + * Direct set a p2m entry: only for use by the P2M code. + * The P2M write lock should be taken. + */ +int p2m_set_entry(struct p2m_domain *p2m, + gfn_t sgfn, + unsigned long nr, + mfn_t smfn, + p2m_type_t t, + p2m_access_t a); + +bool p2m_resolve_translation_fault(struct domain *d, gfn_t gfn); + +void p2m_invalidate_root(struct p2m_domain *p2m); + +/* + * Clean & invalidate caches corresponding to a region [start,end) of guest + * address space. + * + * start will get updated if the function is preempted. + */ +int p2m_cache_flush_range(struct domain *d, gfn_t *pstart, gfn_t end); + +void p2m_set_way_flush(struct vcpu *v); + +void p2m_toggle_cache(struct vcpu *v, bool was_enabled); + +void p2m_flush_vm(struct vcpu *v); + +/* + * Map a region in the guest p2m with a specific p2m type. + * The memory attributes will be derived from the p2m type. + */ +int map_regions_p2mt(struct domain *d, + gfn_t gfn, + unsigned long nr, + mfn_t mfn, + p2m_type_t p2mt); + +int unmap_regions_p2mt(struct domain *d, + gfn_t gfn, + unsigned long nr, + mfn_t mfn); + +int map_dev_mmio_region(struct domain *d, + gfn_t gfn, + unsigned long nr, + mfn_t mfn); + +int guest_physmap_add_entry(struct domain *d, + gfn_t gfn, + mfn_t mfn, + unsigned long page_order, + p2m_type_t t); + +/* Untyped version for RAM only, for compatibility */ +static inline int guest_physmap_add_page(struct domain *d, + gfn_t gfn, + mfn_t mfn, + unsigned int page_order) +{ + return 0; +} + +mfn_t gfn_to_mfn(struct domain *d, gfn_t gfn); + +/* Look up a GFN and take a reference count on the backing page. */ +typedef unsigned int p2m_query_t; +#define P2M_ALLOC (1u<<0) /* Populate PoD and paged-out entries */ +#define P2M_UNSHARE (1u<<1) /* Break CoW sharing */ + +struct page_info *p2m_get_page_from_gfn(struct domain *d, gfn_t gfn, + p2m_type_t *t); + +static inline struct page_info *get_page_from_gfn( + struct domain *d, unsigned long gfn, p2m_type_t *t, p2m_query_t q) +{ + *t = p2m_invalid; + return (void *) 0xdeadbeef; +} + +int get_page_type(struct page_info *page, unsigned long type); +bool is_iomem_page(mfn_t mfn); +static inline int get_page_and_type(struct page_info *page, + struct domain *domain, + unsigned long type) +{ + return 0; +} + +/* get host p2m table */ +#define p2m_get_hostp2m(d) (&(d)->arch.p2m) + +static inline bool p2m_vm_event_sanity_check(struct domain *d) +{ + return true; +} + +/* + * Return the start of the next mapping based on the order of the + * current one. + */ +static inline gfn_t gfn_next_boundary(gfn_t gfn, unsigned int order) +{ + return gfn; +} + +/* + * A vCPU has cache enabled only when the MMU is enabled and data cache + * is enabled. + */ +static inline bool vcpu_has_cache_enabled(struct vcpu *v) +{ + return 0; +} + +#endif /* _XEN_P2M_H */ + +/* + * Local variables: + * mode: C + * c-file-style: "BSD" + * c-basic-offset: 4 + * indent-tabs-mode: nil + * End: + */ diff --git a/xen/include/asm-riscv/page-bits.h b/xen/include/asm-riscv/page-bits.h new file mode 100644 index 0000000000..5a47701fea --- /dev/null +++ b/xen/include/asm-riscv/page-bits.h @@ -0,0 +1,11 @@ +#ifndef __RISCV_PAGE_SHIFT_H__ +#define __RISCV_PAGE_SHIFT_H__ + +#define PAGE_SHIFT 12 + +#ifdef CONFIG_RISCV_64 +#define PADDR_BITS 56 +#define VADDR_BITS 39 +#endif + +#endif /* __RISCV_PAGE_SHIFT_H__ */ diff --git a/xen/include/asm-riscv/page.h b/xen/include/asm-riscv/page.h new file mode 100644 index 0000000000..36c8732efe --- /dev/null +++ b/xen/include/asm-riscv/page.h @@ -0,0 +1,73 @@ +/* + * Copyright (C) 2009 Chen Liqin <liqin.chen@xxxxxxxxxxxxx> + * Copyright (C) 2012 Regents of the University of California + * Copyright (C) 2017 SiFive + * Copyright (C) 2017 XiaojingZhu <zhuxiaoj@xxxxxxxxx> + * Copyright (C) 2019 Bobby Eshleman <bobbyeshleman@xxxxxxxxx> + * Copyright (C) 2021 Connor Davis <connojd@xxxxx> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation, version 2. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#ifndef _ASM_RISCV_PAGE_H +#define _ASM_RISCV_PAGE_H + +#include <xen/const.h> +#include <xen/page-size.h> + +#define PAGE_ALIGN(x) (((x) + PAGE_SIZE - 1) & PAGE_MASK) +#define paddr_bits PADDR_BITS + +#define PTE_VALID BIT(0, UL) +#define PTE_READABLE BIT(1, UL) +#define PTE_WRITABLE BIT(2, UL) +#define PTE_EXECUTABLE BIT(3, UL) +#define PTE_USER BIT(4, UL) +#define PTE_GLOBAL BIT(5, UL) +#define PTE_ACCESSED BIT(6, UL) +#define PTE_DIRTY BIT(7, UL) +#define PTE_RSW (BIT(8, UL) | BIT(9, UL)) + +#ifndef __ASSEMBLY__ + +#define PAGE_HYPERVISOR_RO (PTE_VALID|PTE_READABLE|PTE_ACCESSED) +#define PAGE_HYPERVISOR_RX (PAGE_HYPERVISOR_RO|PTE_EXECUTABLE) +#define PAGE_HYPERVISOR_RW (PAGE_HYPERVISOR_RO|PTE_WRITABLE|PTE_DIRTY) + +/* + * RISC-V does not encode cacheability attributes in the PTEs; + * instead mappings must consult the platform PMAs. + */ +#define PAGE_HYPERVISOR PAGE_HYPERVISOR_RW +#define PAGE_HYPERVISOR_NOCACHE PAGE_HYPERVISOR +#define PAGE_HYPERVISOR_WC PAGE_HYPERVISOR + +typedef struct { + unsigned long pte; +} pte_t; + +#define clear_page(pgaddr) memset((pgaddr), 0, PAGE_SIZE) +#define copy_page(to, from) memcpy((to), (from), PAGE_SIZE) + +/* + * Ensure that stores to instruction memory are locally visible to + * subsequent fetches on this hart. + */ +static inline void invalidate_icache(void) +{ + asm volatile ("fence.i" ::: "memory"); +} + +/* Flush the dcache for an entire page. */ +void flush_page_to_ram(unsigned long mfn, bool sync_icache); + +#endif /* __ASSEMBLY__ */ + +#endif /* _ASM_RISCV_PAGE_H */ diff --git a/xen/include/asm-riscv/paging.h b/xen/include/asm-riscv/paging.h new file mode 100644 index 0000000000..3f9f704273 --- /dev/null +++ b/xen/include/asm-riscv/paging.h @@ -0,0 +1,15 @@ +#ifndef _XEN_PAGING_H +#define _XEN_PAGING_H + +#define paging_mode_translate(d) (1) + +#endif /* _XEN_PAGING_H */ + +/* + * Local variables: + * mode: C + * c-file-style: "BSD" + * c-basic-offset: 4 + * indent-tabs-mode: nil + * End: + */ diff --git a/xen/include/asm-riscv/pci.h b/xen/include/asm-riscv/pci.h new file mode 100644 index 0000000000..0ccf335e34 --- /dev/null +++ b/xen/include/asm-riscv/pci.h @@ -0,0 +1,31 @@ +/****************************************************************************** + * + * Copyright 2019 (C) Alistair Francis <alistair.francis@xxxxxxx> + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to + * deal in the Software without restriction, including without limitation the + * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or + * sell copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + * DEALINGS IN THE SOFTWARE. + * + */ + +#ifndef __RISCV_PCI_H__ +#define __RISCV_PCI_H__ + +struct arch_pci_dev { +}; + +#endif /* __RISCV_PCI_H__ */ diff --git a/xen/include/asm-riscv/percpu.h b/xen/include/asm-riscv/percpu.h new file mode 100644 index 0000000000..0d165d6aa1 --- /dev/null +++ b/xen/include/asm-riscv/percpu.h @@ -0,0 +1,33 @@ +#ifndef __RISCV_PERCPU_H__ +#define __RISCV_PERCPU_H__ + +#ifndef __ASSEMBLY__ + +#include <xen/types.h> +#include <asm/sysregs.h> + +extern char __per_cpu_start[], __per_cpu_data_end[]; +extern unsigned long __per_cpu_offset[NR_CPUS]; +void percpu_init_areas(void); + +#define per_cpu(var, cpu) \ + (*RELOC_HIDE(&per_cpu__##var, __per_cpu_offset[cpu])) +#define this_cpu(var) \ + (*RELOC_HIDE(&per_cpu__##var, csr_read(CSR_SCRATCH))) + +#define per_cpu_ptr(var, cpu) \ + (*RELOC_HIDE(var, __per_cpu_offset[cpu])) +#define this_cpu_ptr(var) \ + (*RELOC_HIDE(var, csr_read(CSR_SCRATCH))) + +#endif + +#endif /* __RISCV_PERCPU_H__ */ +/* + * Local variables: + * mode: C + * c-file-style: "BSD" + * c-basic-offset: 4 + * indent-tabs-mode: nil + * End: + */ diff --git a/xen/include/asm-riscv/processor.h b/xen/include/asm-riscv/processor.h new file mode 100644 index 0000000000..19e681652a --- /dev/null +++ b/xen/include/asm-riscv/processor.h @@ -0,0 +1,59 @@ +/****************************************************************************** + * + * Copyright 2019 (C) Alistair Francis <alistair.francis@xxxxxxx> + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to + * deal in the Software without restriction, including without limitation the + * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or + * sell copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + * DEALINGS IN THE SOFTWARE. + * + */ + +#ifndef _ASM_RISCV_PROCESSOR_H +#define _ASM_RISCV_PROCESSOR_H + +#ifndef __ASSEMBLY__ + +/* On stack VCPU state */ +struct cpu_user_regs { + unsigned long r0; +}; + +void show_execution_state(const struct cpu_user_regs *regs); +void show_registers(const struct cpu_user_regs *regs); + +/* All a bit UP for the moment */ +#define cpu_to_core(_cpu) (0) +#define cpu_to_socket(_cpu) (0) + +/* Based on Linux: arch/riscv/include/asm/processor.h */ + +static inline void cpu_relax(void) +{ + int dummy; + /* In lieu of a halt instruction, induce a long-latency stall. */ + __asm__ __volatile__ ("div %0, %0, zero" : "=r" (dummy)); + barrier(); +} + +static inline void wait_for_interrupt(void) +{ + __asm__ __volatile__ ("wfi"); +} + +#endif /* __ASSEMBLY__ */ + +#endif /* _ASM_RISCV_PROCESSOR_H */ diff --git a/xen/include/asm-riscv/random.h b/xen/include/asm-riscv/random.h new file mode 100644 index 0000000000..b4acee276b --- /dev/null +++ b/xen/include/asm-riscv/random.h @@ -0,0 +1,9 @@ +#ifndef __ASM_RANDOM_H__ +#define __ASM_RANDOM_H__ + +static inline unsigned int arch_get_random(void) +{ + return 0; +} + +#endif /* __ASM_RANDOM_H__ */ diff --git a/xen/include/asm-riscv/regs.h b/xen/include/asm-riscv/regs.h new file mode 100644 index 0000000000..82e7dd2aee --- /dev/null +++ b/xen/include/asm-riscv/regs.h @@ -0,0 +1,23 @@ +#ifndef __ARM_REGS_H__ +#define __ARM_REGS_H__ + +#ifndef __ASSEMBLY__ + +#include <asm/current.h> + +static inline bool guest_mode(const struct cpu_user_regs *r) +{ + return false; +} + +#endif + +#endif /* __ARM_REGS_H__ */ +/* + * Local variables: + * mode: C + * c-file-style: "BSD" + * c-basic-offset: 4 + * indent-tabs-mode: nil + * End: + */ diff --git a/xen/include/asm-riscv/setup.h b/xen/include/asm-riscv/setup.h new file mode 100644 index 0000000000..d0fc75054e --- /dev/null +++ b/xen/include/asm-riscv/setup.h @@ -0,0 +1,14 @@ +#ifndef __RISCV_SETUP_H_ +#define __RISCV_SETUP_H_ + +#define max_init_domid (0) + +#endif /* __RISCV_SETUP_H_ */ +/* + * Local variables: + * mode: C + * c-file-style: "BSD" + * c-basic-offset: 4 + * indent-tabs-mode: nil + * End: + */ diff --git a/xen/include/asm-riscv/smp.h b/xen/include/asm-riscv/smp.h new file mode 100644 index 0000000000..f0f0b06501 --- /dev/null +++ b/xen/include/asm-riscv/smp.h @@ -0,0 +1,46 @@ +/****************************************************************************** + * + * Copyright 2019 (C) Alistair Francis <alistair.francis@xxxxxxx> + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to + * deal in the Software without restriction, including without limitation the + * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or + * sell copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + * DEALINGS IN THE SOFTWARE. + * + */ + +#ifndef _ASM_RISCV_SMP_H +#define _ASM_RISCV_SMP_H + +#ifndef __ASSEMBLY__ +#include <xen/cpumask.h> +#include <asm/current.h> +#endif + +DECLARE_PER_CPU(cpumask_var_t, cpu_sibling_mask); +DECLARE_PER_CPU(cpumask_var_t, cpu_core_mask); + +/* + * Do we, for platform reasons, need to actually keep CPUs online when we + * would otherwise prefer them to be off? + */ +#define park_offline_cpus true + +#define cpu_is_offline(cpu) unlikely(!cpu_online(cpu)) + +#define smp_processor_id() get_processor_id() + +#endif /* _ASM_RISCV_SMP_H */ diff --git a/xen/include/asm-riscv/softirq.h b/xen/include/asm-riscv/softirq.h new file mode 100644 index 0000000000..976e0ebd70 --- /dev/null +++ b/xen/include/asm-riscv/softirq.h @@ -0,0 +1,16 @@ +#ifndef __ASM_SOFTIRQ_H__ +#define __ASM_SOFTIRQ_H__ + +#define NR_ARCH_SOFTIRQS 0 + +#define arch_skip_send_event_check(cpu) 0 + +#endif /* __ASM_SOFTIRQ_H__ */ +/* + * Local variables: + * mode: C + * c-file-style: "BSD" + * c-basic-offset: 4 + * indent-tabs-mode: nil + * End: + */ diff --git a/xen/include/asm-riscv/spinlock.h b/xen/include/asm-riscv/spinlock.h new file mode 100644 index 0000000000..77e6736e71 --- /dev/null +++ b/xen/include/asm-riscv/spinlock.h @@ -0,0 +1,12 @@ +#ifndef __ASM_SPINLOCK_H +#define __ASM_SPINLOCK_H + +#define arch_lock_acquire_barrier() +#define arch_lock_release_barrier() + +#define arch_lock_relax() +#define arch_lock_signal() + +#define arch_lock_signal_wmb() + +#endif /* __ASM_SPINLOCK_H */ diff --git a/xen/include/asm-riscv/string.h b/xen/include/asm-riscv/string.h new file mode 100644 index 0000000000..733e9e00d3 --- /dev/null +++ b/xen/include/asm-riscv/string.h @@ -0,0 +1,28 @@ +/****************************************************************************** + * + * Copyright 2019 (C) Alistair Francis <alistair.francis@xxxxxxx> + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to + * deal in the Software without restriction, including without limitation the + * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or + * sell copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + * DEALINGS IN THE SOFTWARE. + * + */ + +#ifndef _ASM_RISCV_STRING_H +#define _ASM_RISCV_STRING_H + +#endif /* _ASM_RISCV_STRING_H */ diff --git a/xen/include/asm-riscv/sysregs.h b/xen/include/asm-riscv/sysregs.h new file mode 100644 index 0000000000..ae0945d902 --- /dev/null +++ b/xen/include/asm-riscv/sysregs.h @@ -0,0 +1,16 @@ +#ifndef __ASM_RISCV_SYSREGS_H +#define __ASM_RISCV_SYSREGS_H + +#include <asm/csr.h> + +#endif /* __ASM_RISCV_SYSREGS_H */ +/* + * Local variables: + * mode: C + * c-file-style: "BSD" + * c-basic-offset: 4 + * indent-tabs-mode: nil + * End: + */ + + diff --git a/xen/include/asm-riscv/system.h b/xen/include/asm-riscv/system.h new file mode 100644 index 0000000000..276e7ba550 --- /dev/null +++ b/xen/include/asm-riscv/system.h @@ -0,0 +1,99 @@ +/* + * Based on arch/arm/include/asm/system.h + * + * Copyright (C) 2012 ARM Ltd. + * Copyright (C) 2013 Regents of the University of California + * Copyright (C) 2017 SiFive + * Copyright (C) 2021 Connor Davis <connojd@xxxxx> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#ifndef _ASM_RISCV_BARRIER_H +#define _ASM_RISCV_BARRIER_H + +#include <asm/csr.h> +#include <xen/lib.h> + +#ifndef __ASSEMBLY__ + +#define nop() __asm__ __volatile__ ("nop") + +#define RISCV_FENCE(p, s) \ + __asm__ __volatile__ ("fence " #p "," #s : : : "memory") + +/* These barriers need to enforce ordering on both devices or memory. */ +#define mb() RISCV_FENCE(iorw,iorw) +#define rmb() RISCV_FENCE(ir,ir) +#define wmb() RISCV_FENCE(ow,ow) + +/* These barriers do not need to enforce ordering on devices, just memory. */ +#define smp_mb() RISCV_FENCE(rw,rw) +#define smp_rmb() RISCV_FENCE(r,r) +#define smp_wmb() RISCV_FENCE(w,w) + +#define smp_mb__before_atomic() smp_mb() +#define smp_mb__after_atomic() smp_mb() + +#define __smp_store_release(p, v) \ +do { \ + compiletime_assert_atomic_type(*p); \ + RISCV_FENCE(rw,w); \ + WRITE_ONCE(*p, v); \ +} while (0) + +#define __smp_load_acquire(p) \ +({ \ + typeof(*p) ___p1 = READ_ONCE(*p); \ + compiletime_assert_atomic_type(*p); \ + RISCV_FENCE(r,rw); \ + ___p1; \ +}) + +static inline unsigned long local_save_flags(void) +{ + return csr_read(CSR_STATUS); +} + +static inline void local_irq_enable(void) +{ + csr_set(CSR_STATUS, SR_IE); +} + +static inline void local_irq_disable(void) +{ + csr_clear(CSR_STATUS, SR_IE); +} + +#define local_irq_save(x) \ +({ \ + x = csr_read_clear(CSR_STATUS, SR_IE); \ +}) + +static inline void local_irq_restore(unsigned long flags) +{ + csr_set(CSR_STATUS, flags & SR_IE); +} + +static inline int local_irq_is_enabled(void) +{ + unsigned long flags = local_save_flags(); + + return !!(flags & SR_IE); +} + +#define arch_fetch_and_add(x, v) __sync_fetch_and_add(x, v) + +#endif /* __ASSEMBLY__ */ + +#endif /* _ASM_RISCV_BARRIER_H */ diff --git a/xen/include/asm-riscv/time.h b/xen/include/asm-riscv/time.h new file mode 100644 index 0000000000..af1a8ece45 --- /dev/null +++ b/xen/include/asm-riscv/time.h @@ -0,0 +1,31 @@ + /* + * Copyright (C) 2012 Regents of the University of California + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation, version 2. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#ifndef _ASM_RISCV_TIMEX_H +#define _ASM_RISCV_TIMEX_H + +typedef uint64_t cycles_t; + +#ifdef CONFIG_64BIT +static inline cycles_t get_cycles(void) +{ + cycles_t n; + + __asm__ __volatile__ ( + "rdtime %0" + : "=r" (n)); + return n; +} +#endif + +#endif /* _ASM_RISCV_TIMEX_H */ diff --git a/xen/include/asm-riscv/trace.h b/xen/include/asm-riscv/trace.h new file mode 100644 index 0000000000..e06def61f6 --- /dev/null +++ b/xen/include/asm-riscv/trace.h @@ -0,0 +1,12 @@ +#ifndef __ASM_TRACE_H__ +#define __ASM_TRACE_H__ + +#endif /* __ASM_TRACE_H__ */ +/* + * Local variables: + * mode: C + * c-file-style: "BSD" + * c-basic-offset: 4 + * indent-tabs-mode: nil + * End: + */ diff --git a/xen/include/asm-riscv/types.h b/xen/include/asm-riscv/types.h new file mode 100644 index 0000000000..b1c76a59c2 --- /dev/null +++ b/xen/include/asm-riscv/types.h @@ -0,0 +1,60 @@ +#ifndef __RISCV_TYPES_H__ +#define __RISCV_TYPES_H__ + +#ifndef __ASSEMBLY__ + +typedef __signed__ char __s8; +typedef unsigned char __u8; + +typedef __signed__ short __s16; +typedef unsigned short __u16; + +typedef __signed__ int __s32; +typedef unsigned int __u32; + +#if defined(__GNUC__) && !defined(__STRICT_ANSI__) +#if defined(CONFIG_RISCV_64) +typedef __signed__ long __s64; +typedef unsigned long __u64; +#endif +#endif + +typedef signed char s8; +typedef unsigned char u8; + +typedef signed short s16; +typedef unsigned short u16; + +typedef signed int s32; +typedef unsigned int u32; + +#if defined(CONFIG_RISCV_64) +typedef signed long s64; +typedef unsigned long u64; +typedef u64 vaddr_t; +#define PRIvaddr PRIx64 +typedef u64 paddr_t; +#define INVALID_PADDR (~0UL) +#define PRIpaddr "016lx" +typedef u64 register_t; +#define PRIregister "lx" +#endif + +#if defined(__SIZE_TYPE__) +typedef __SIZE_TYPE__ size_t; +#else +typedef unsigned long size_t; +#endif +typedef signed long ssize_t; + +#endif /* __ASSEMBLY__ */ + +#endif /* __RISCV_TYPES_H__ */ +/* + * Local variables: + * mode: C + * c-file-style: "BSD" + * c-basic-offset: 4 + * indent-tabs-mode: nil + * End: + */ diff --git a/xen/include/asm-riscv/vm_event.h b/xen/include/asm-riscv/vm_event.h new file mode 100644 index 0000000000..92d24bc381 --- /dev/null +++ b/xen/include/asm-riscv/vm_event.h @@ -0,0 +1,55 @@ +/* + * vm_event.h: architecture specific vm_event handling routines + * + * Copyright (c) 2015 Tamas K Lengyel (tamas@xxxxxxxxxxxxx) + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License along with + * this program; If not, see <http://www.gnu.org/licenses/>. + */ + +#ifndef __ASM_RISCV_VM_EVENT_H__ +#define __ASM_RISCV_VM_EVENT_H__ + +#include <xen/sched.h> +#include <xen/vm_event.h> +#include <public/domctl.h> + +static inline int vm_event_init_domain(struct domain *d) +{ + return 0; +} + +static inline void vm_event_cleanup_domain(struct domain *d) +{ +} + +static inline void vm_event_toggle_singlestep(struct domain *d, struct vcpu *v, + vm_event_response_t *rsp) +{ +} + +static inline +void vm_event_register_write_resume(struct vcpu *v, vm_event_response_t *rsp) +{ +} + +static inline +void vm_event_emulate_check(struct vcpu *v, vm_event_response_t *rsp) +{ +} + +static inline +void vm_event_sync_event(struct vcpu *v, bool value) +{ +} + +#endif /* __ASM_RISCV_VM_EVENT_H__ */ diff --git a/xen/include/asm-riscv/xenoprof.h b/xen/include/asm-riscv/xenoprof.h new file mode 100644 index 0000000000..3db6ce3ab2 --- /dev/null +++ b/xen/include/asm-riscv/xenoprof.h @@ -0,0 +1,12 @@ +#ifndef __ASM_XENOPROF_H__ +#define __ASM_XENOPROF_H__ + +#endif /* __ASM_XENOPROF_H__ */ +/* + * Local variables: + * mode: C + * c-file-style: "BSD" + * c-basic-offset: 4 + * indent-tabs-mode: nil + * End: + */ diff --git a/xen/include/public/arch-riscv.h b/xen/include/public/arch-riscv.h new file mode 100644 index 0000000000..29d7f5a9b7 --- /dev/null +++ b/xen/include/public/arch-riscv.h @@ -0,0 +1,183 @@ +/****************************************************************************** + * arch-riscv.h + * + * Guest OS interface to RISC-V Xen. + * Initially based on the ARM implementation + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to + * deal in the Software without restriction, including without limitation the + * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or + * sell copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + * DEALINGS IN THE SOFTWARE. + * + * Copyright 2019 (C) Alistair Francis <alistair.francis@xxxxxxx> + */ + +#ifndef __XEN_PUBLIC_ARCH_RISCV_H__ +#define __XEN_PUBLIC_ARCH_RISCV_H__ + +#include <xen/types.h> + +#define int64_aligned_t int64_t __attribute__((aligned(8))) +#define uint64_aligned_t uint64_t __attribute__((aligned(8))) + +#ifndef __ASSEMBLY__ +#define ___DEFINE_XEN_GUEST_HANDLE(name, type) \ + typedef union { type *p; unsigned long q; } \ + __guest_handle_ ## name; \ + typedef union { type *p; uint64_aligned_t q; } \ + __guest_handle_64_ ## name + +/* + * XEN_GUEST_HANDLE represents a guest pointer, when passed as a field + * in a struct in memory. On rv64 it is 8 bytes long and 8-byte aligned. + * + * XEN_GUEST_HANDLE_PARAM represents a guest pointer, when passed as a + * hypercall argument. It is 4 bytes on rv32 and 8 bytes on rv64. + */ +#define __DEFINE_XEN_GUEST_HANDLE(name, type) \ + ___DEFINE_XEN_GUEST_HANDLE(name, type); \ + ___DEFINE_XEN_GUEST_HANDLE(const_##name, const type) +#define DEFINE_XEN_GUEST_HANDLE(name) __DEFINE_XEN_GUEST_HANDLE(name, name) +#define __XEN_GUEST_HANDLE(name) __guest_handle_64_ ## name +#define XEN_GUEST_HANDLE(name) __XEN_GUEST_HANDLE(name) +#define XEN_GUEST_HANDLE_PARAM(name) __guest_handle_ ## name +#define set_xen_guest_handle_raw(hnd, val) \ + do { \ + typeof(&(hnd)) _sxghr_tmp = &(hnd); \ + _sxghr_tmp->q = 0; \ + _sxghr_tmp->p = val; \ + } while ( 0 ) +#define set_xen_guest_handle(hnd, val) set_xen_guest_handle_raw(hnd, val) + +#if defined(__GNUC__) && !defined(__STRICT_ANSI__) +/* Anonymous union includes both 32- and 64-bit names (e.g., r0/x0). */ +# define __DECL_REG(n64, n32) union { \ + uint64_t n64; \ + uint32_t n32; \ + } +#else +/* Non-gcc sources must always use the proper 64-bit name (e.g., x0). */ +#define __DECL_REG(n64, n32) uint64_t n64 +#endif + +struct vcpu_guest_core_regs +{ + unsigned long zero; + unsigned long ra; + unsigned long sp; + unsigned long gp; + unsigned long tp; + unsigned long t0; + unsigned long t1; + unsigned long t2; + unsigned long s0; + unsigned long s1; + unsigned long a0; + unsigned long a1; + unsigned long a2; + unsigned long a3; + unsigned long a4; + unsigned long a5; + unsigned long a6; + unsigned long a7; + unsigned long s2; + unsigned long s3; + unsigned long s4; + unsigned long s5; + unsigned long s6; + unsigned long s7; + unsigned long s8; + unsigned long s9; + unsigned long s10; + unsigned long s11; + unsigned long t3; + unsigned long t4; + unsigned long t5; + unsigned long t6; + unsigned long sepc; + unsigned long sstatus; + unsigned long hstatus; + unsigned long sp_exec; + + unsigned long hedeleg; + unsigned long hideleg; + unsigned long bsstatus; + unsigned long bsie; + unsigned long bstvec; + unsigned long bsscratch; + unsigned long bsepc; + unsigned long bscause; + unsigned long bstval; + unsigned long bsip; + unsigned long bsatp; +}; +typedef struct vcpu_guest_core_regs vcpu_guest_core_regs_t; +DEFINE_XEN_GUEST_HANDLE(vcpu_guest_core_regs_t); + +typedef uint64_t xen_pfn_t; +#define PRI_xen_pfn PRIx64 +#define PRIu_xen_pfn PRIu64 + +typedef uint64_t xen_ulong_t; +#define PRI_xen_ulong PRIx64 + +#if defined(__XEN__) || defined(__XEN_TOOLS__) + +struct vcpu_guest_context { +}; +typedef struct vcpu_guest_context vcpu_guest_context_t; +DEFINE_XEN_GUEST_HANDLE(vcpu_guest_context_t); + +struct xen_arch_domainconfig { +}; + +struct arch_vcpu_info { +}; +typedef struct arch_vcpu_info arch_vcpu_info_t; + +struct arch_shared_info { +}; +typedef struct arch_shared_info arch_shared_info_t; + +typedef uint64_t xen_callback_t; + +#endif + +/* Maximum number of virtual CPUs in legacy multi-processor guests. */ +/* Only one. All other VCPUS must use VCPUOP_register_vcpu_info */ +#define XEN_LEGACY_MAX_VCPUS 1 + +/* Current supported guest VCPUs */ +#define GUEST_MAX_VCPUS 128 + +#endif /* __ASSEMBLY__ */ + +#ifndef __ASSEMBLY__ +/* Stub definition of PMU structure */ +typedef struct xen_pmu_arch { uint8_t dummy; } xen_pmu_arch_t; +#endif + +#endif /* __XEN_PUBLIC_ARCH_RISCV_H__ */ + +/* + * Local variables: + * mode: C + * c-file-style: "BSD" + * c-basic-offset: 4 + * tab-width: 4 + * indent-tabs-mode: nil + * End: + */ diff --git a/xen/include/public/arch-riscv/hvm/save.h b/xen/include/public/arch-riscv/hvm/save.h new file mode 100644 index 0000000000..fa010f0315 --- /dev/null +++ b/xen/include/public/arch-riscv/hvm/save.h @@ -0,0 +1,39 @@ +/* + * Structure definitions for HVM state that is held by Xen and must + * be saved along with the domain's memory and device-model state. + * + * Copyright (c) 2012 Citrix Systems Ltd. + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to + * deal in the Software without restriction, including without limitation the + * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or + * sell copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + * DEALINGS IN THE SOFTWARE. + */ + +#ifndef __XEN_PUBLIC_HVM_SAVE_RISCV_H__ +#define __XEN_PUBLIC_HVM_SAVE_RISCV_H__ + +#endif + +/* + * Local variables: + * mode: C + * c-file-style: "BSD" + * c-basic-offset: 4 + * tab-width: 4 + * indent-tabs-mode: nil + * End: + */ diff --git a/xen/include/public/hvm/save.h b/xen/include/public/hvm/save.h index f72e3a9bc4..d7505f279c 100644 --- a/xen/include/public/hvm/save.h +++ b/xen/include/public/hvm/save.h @@ -106,6 +106,8 @@ DECLARE_HVM_SAVE_TYPE(END, 0, struct hvm_save_end); #include "../arch-x86/hvm/save.h" #elif defined(__arm__) || defined(__aarch64__) #include "../arch-arm/hvm/save.h" +#elif defined(__riscv) +#include "../arch-riscv/hvm/save.h" #else #error "unsupported architecture" #endif diff --git a/xen/include/public/pmu.h b/xen/include/public/pmu.h index cc2fcf8816..3fb1bcd900 100644 --- a/xen/include/public/pmu.h +++ b/xen/include/public/pmu.h @@ -28,6 +28,8 @@ #include "arch-x86/pmu.h" #elif defined (__arm__) || defined (__aarch64__) #include "arch-arm.h" +#elif defined (__riscv) +#include "arch-riscv.h" #else #error "Unsupported architecture" #endif diff --git a/xen/include/public/xen.h b/xen/include/public/xen.h index e373592c33..1d80b64ee0 100644 --- a/xen/include/public/xen.h +++ b/xen/include/public/xen.h @@ -33,6 +33,8 @@ #include "arch-x86/xen.h" #elif defined(__arm__) || defined (__aarch64__) #include "arch-arm.h" +#elif defined(__riscv) +#include "arch-riscv.h" #else #error "Unsupported architecture" #endif diff --git a/xen/include/xen/domain.h b/xen/include/xen/domain.h index 1708c36964..fd0b75677c 100644 --- a/xen/include/xen/domain.h +++ b/xen/include/xen/domain.h @@ -60,6 +60,7 @@ void arch_vcpu_destroy(struct vcpu *v); int map_vcpu_info(struct vcpu *v, unsigned long gfn, unsigned offset); void unmap_vcpu_info(struct vcpu *v); +struct xen_domctl_createdomain; int arch_domain_create(struct domain *d, struct xen_domctl_createdomain *config); -- 2.27.0

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