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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [PATCH v4 2/2] xen/arm: add FF-A mediator
Adds a FF-A version 1.1 [1] mediator to communicate with a Secure Partition in secure world. The implementation is the bare minimum to be able to communicate with OP-TEE running as an SPMC at S-EL1. This is loosely based on the TEE mediator framework and the OP-TEE mediator. [1] https://developer.arm.com/documentation/den0077/latest Signed-off-by: Jens Wiklander <jens.wiklander@xxxxxxxxxx> --- SUPPORT.md | 7 + tools/libs/light/libxl_arm.c | 3 + tools/libs/light/libxl_types.idl | 1 + tools/xl/xl_parse.c | 3 + xen/arch/arm/Kconfig | 11 + xen/arch/arm/Makefile | 1 + xen/arch/arm/domain.c | 10 + xen/arch/arm/domain_build.c | 1 + xen/arch/arm/ffa.c | 1683 +++++++++++++++++++++++++++++ xen/arch/arm/include/asm/domain.h | 4 + xen/arch/arm/include/asm/ffa.h | 71 ++ xen/arch/arm/vsmc.c | 17 +- xen/include/public/arch-arm.h | 2 + 13 files changed, 1811 insertions(+), 3 deletions(-) create mode 100644 xen/arch/arm/ffa.c create mode 100644 xen/arch/arm/include/asm/ffa.h diff --git a/SUPPORT.md b/SUPPORT.md index 70e98964cbc0..215bb3c9043b 100644 --- a/SUPPORT.md +++ b/SUPPORT.md @@ -785,6 +785,13 @@ that covers the DMA of the device to be passed through. No support for QEMU backends in a 16K or 64K domain. +### ARM: Firmware Framework for Arm A-profile (FF-A) Mediator + + Status, Arm64: Tech Preview + +There are still some code paths where a vCPU may hog a pCPU longer than +necessary. The FF-A mediator is not yet implemented for Arm32. + ### ARM: Guest Device Tree support Status: Supported diff --git a/tools/libs/light/libxl_arm.c b/tools/libs/light/libxl_arm.c index eef1de093914..a985609861c7 100644 --- a/tools/libs/light/libxl_arm.c +++ b/tools/libs/light/libxl_arm.c @@ -101,6 +101,9 @@ int libxl__arch_domain_prepare_config(libxl__gc *gc, return ERROR_FAIL; } + config->arch.ffa_enabled = + libxl_defbool_val(d_config->b_info.arch_arm.ffa_enabled); + return 0; } diff --git a/tools/libs/light/libxl_types.idl b/tools/libs/light/libxl_types.idl index 2a42da2f7d78..bf4544bef399 100644 --- a/tools/libs/light/libxl_types.idl +++ b/tools/libs/light/libxl_types.idl @@ -646,6 +646,7 @@ libxl_domain_build_info = Struct("domain_build_info",[ ("arch_arm", Struct(None, [("gic_version", libxl_gic_version), ("vuart", libxl_vuart_type), + ("ffa_enabled", libxl_defbool), ])), ("arch_x86", Struct(None, [("msr_relaxed", libxl_defbool), ])), diff --git a/tools/xl/xl_parse.c b/tools/xl/xl_parse.c index b98c0de378b6..e0e99ed8d2b1 100644 --- a/tools/xl/xl_parse.c +++ b/tools/xl/xl_parse.c @@ -2746,6 +2746,9 @@ skip_usbdev: exit(-ERROR_FAIL); } } + libxl_defbool_setdefault(&b_info->arch_arm.ffa_enabled, false); + xlu_cfg_get_defbool(config, "ffa_enabled", + &b_info->arch_arm.ffa_enabled, 0); parse_vkb_list(config, d_config); diff --git a/xen/arch/arm/Kconfig b/xen/arch/arm/Kconfig index be9eff014120..e57e1d3757e2 100644 --- a/xen/arch/arm/Kconfig +++ b/xen/arch/arm/Kconfig @@ -139,6 +139,17 @@ config TEE source "arch/arm/tee/Kconfig" +config FFA + bool "Enable FF-A mediator support" if EXPERT + default n + depends on ARM_64 + help + This option enables a minimal FF-A mediator. The mediator is + generic as it follows the FF-A specification [1], but it only + implements a small subset of the specification. + + [1] https://developer.arm.com/documentation/den0077/latest + endmenu menu "ARM errata workaround via the alternative framework" diff --git a/xen/arch/arm/Makefile b/xen/arch/arm/Makefile index bb7a6151c13c..af0c69f793d4 100644 --- a/xen/arch/arm/Makefile +++ b/xen/arch/arm/Makefile @@ -20,6 +20,7 @@ obj-y += domain_build.init.o obj-y += domctl.o obj-$(CONFIG_EARLY_PRINTK) += early_printk.o obj-y += efi/ +obj-$(CONFIG_FFA) += ffa.o obj-y += gic.o obj-y += gic-v2.o obj-$(CONFIG_GICV3) += gic-v3.o diff --git a/xen/arch/arm/domain.c b/xen/arch/arm/domain.c index 8110c1df8638..a3f00e7e234d 100644 --- a/xen/arch/arm/domain.c +++ b/xen/arch/arm/domain.c @@ -27,6 +27,7 @@ #include <asm/cpufeature.h> #include <asm/current.h> #include <asm/event.h> +#include <asm/ffa.h> #include <asm/gic.h> #include <asm/guest_atomics.h> #include <asm/irq.h> @@ -756,6 +757,9 @@ int arch_domain_create(struct domain *d, if ( (rc = tee_domain_init(d, config->arch.tee_type)) != 0 ) goto fail; + if ( (rc = ffa_domain_init(d, config->arch.ffa_enabled)) != 0 ) + goto fail; + update_domain_wallclock_time(d); /* @@ -998,6 +1002,7 @@ static int relinquish_memory(struct domain *d, struct page_list_head *list) enum { PROG_pci = 1, PROG_tee, + PROG_ffa, PROG_xen, PROG_page, PROG_mapping, @@ -1043,6 +1048,11 @@ int domain_relinquish_resources(struct domain *d) PROGRESS(tee): ret = tee_relinquish_resources(d); + if ( ret ) + return ret; + + PROGRESS(ffa): + ret = ffa_relinquish_resources(d); if (ret ) return ret; diff --git a/xen/arch/arm/domain_build.c b/xen/arch/arm/domain_build.c index 7ddd16c26da5..d708f76356f7 100644 --- a/xen/arch/arm/domain_build.c +++ b/xen/arch/arm/domain_build.c @@ -3450,6 +3450,7 @@ void __init create_dom0(void) if ( gic_number_lines() > 992 ) printk(XENLOG_WARNING "Maximum number of vGIC IRQs exceeded.\n"); dom0_cfg.arch.tee_type = tee_get_type(); + dom0_cfg.arch.ffa_enabled = true; dom0_cfg.max_vcpus = dom0_max_vcpus(); if ( iommu_enabled ) diff --git a/xen/arch/arm/ffa.c b/xen/arch/arm/ffa.c new file mode 100644 index 000000000000..3117ce5cec4d --- /dev/null +++ b/xen/arch/arm/ffa.c @@ -0,0 +1,1683 @@ +/* + * xen/arch/arm/ffa.c + * + * Arm Firmware Framework for ARMv8-A (FF-A) mediator + * + * Copyright (C) 2022 Linaro Limited + * + * 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. + */ + +#include <xen/domain_page.h> +#include <xen/errno.h> +#include <xen/init.h> +#include <xen/lib.h> +#include <xen/sched.h> +#include <xen/types.h> +#include <xen/sizes.h> +#include <xen/bitops.h> + +#include <asm/smccc.h> +#include <asm/event.h> +#include <asm/ffa.h> +#include <asm/regs.h> + +/* Error codes */ +#define FFA_RET_OK 0 +#define FFA_RET_NOT_SUPPORTED -1 +#define FFA_RET_INVALID_PARAMETERS -2 +#define FFA_RET_NO_MEMORY -3 +#define FFA_RET_BUSY -4 +#define FFA_RET_INTERRUPTED -5 +#define FFA_RET_DENIED -6 +#define FFA_RET_RETRY -7 +#define FFA_RET_ABORTED -8 + +/* FFA_VERSION helpers */ +#define FFA_VERSION_MAJOR _AC(1,U) +#define FFA_VERSION_MAJOR_SHIFT _AC(16,U) +#define FFA_VERSION_MAJOR_MASK _AC(0x7FFF,U) +#define FFA_VERSION_MINOR _AC(1,U) +#define FFA_VERSION_MINOR_SHIFT _AC(0,U) +#define FFA_VERSION_MINOR_MASK _AC(0xFFFF,U) +#define MAKE_FFA_VERSION(major, minor) \ + ((((major) & FFA_VERSION_MAJOR_MASK) << FFA_VERSION_MAJOR_SHIFT) | \ + ((minor) & FFA_VERSION_MINOR_MASK)) + +#define FFA_MIN_VERSION MAKE_FFA_VERSION(1, 0) +#define FFA_VERSION_1_0 MAKE_FFA_VERSION(1, 0) +#define FFA_VERSION_1_1 MAKE_FFA_VERSION(1, 1) +#define FFA_MY_VERSION MAKE_FFA_VERSION(FFA_VERSION_MAJOR, \ + FFA_VERSION_MINOR) + + +#define FFA_HANDLE_HYP_FLAG BIT(63,ULL) + +/* Memory attributes: Normal memory, Write-Back cacheable, Inner shareable */ +#define FFA_NORMAL_MEM_REG_ATTR _AC(0x2f,U) + +/* Memory access permissions: Read-write */ +#define FFA_MEM_ACC_RW _AC(0x2,U) + +/* Clear memory before mapping in receiver */ +#define FFA_MEMORY_REGION_FLAG_CLEAR BIT(0, U) +/* Relayer may time slice this operation */ +#define FFA_MEMORY_REGION_FLAG_TIME_SLICE BIT(1, U) +/* Clear memory after receiver relinquishes it */ +#define FFA_MEMORY_REGION_FLAG_CLEAR_RELINQUISH BIT(2, U) + +/* Share memory transaction */ +#define FFA_MEMORY_REGION_TRANSACTION_TYPE_SHARE (_AC(1,U) << 3) + +#define FFA_HANDLE_INVALID _AC(0xffffffffffffffff,ULL) + +/* Framework direct request/response */ +#define FFA_MSG_FLAG_FRAMEWORK BIT(31, U) +#define FFA_MSG_TYPE_MASK _AC(0xFF,U); +#define FFA_MSG_PSCI _AC(0x0,U) +#define FFA_MSG_SEND_VM_CREATED _AC(0x4,U) +#define FFA_MSG_RESP_VM_CREATED _AC(0x5,U) +#define FFA_MSG_SEND_VM_DESTROYED _AC(0x6,U) +#define FFA_MSG_RESP_VM_DESTROYED _AC(0x7,U) + +/* + * Flags used for the FFA_PARTITION_INFO_GET return message: + * BIT(0): Supports receipt of direct requests + * BIT(1): Can send direct requests + * BIT(2): Can send and receive indirect messages + * BIT(3): Supports receipt of notifications + * BIT(4-5): Partition ID is a PE endpoint ID + */ +#define FFA_PART_PROP_DIRECT_REQ_RECV BIT(0,U) +#define FFA_PART_PROP_DIRECT_REQ_SEND BIT(1,U) +#define FFA_PART_PROP_INDIRECT_MSGS BIT(2,U) +#define FFA_PART_PROP_RECV_NOTIF BIT(3,U) +#define FFA_PART_PROP_IS_PE_ID (_AC(0,U) << 4) +#define FFA_PART_PROP_IS_SEPID_INDEP (_AC(1,U) << 4) +#define FFA_PART_PROP_IS_SEPID_DEP (_AC(2,U) << 4) +#define FFA_PART_PROP_IS_AUX_ID (_AC(3,U) << 4) +#define FFA_PART_PROP_NOTIF_CREATED BIT(6,U) +#define FFA_PART_PROP_NOTIF_DESTROYED BIT(7,U) +#define FFA_PART_PROP_AARCH64_STATE BIT(8,U) + +/* Function IDs */ +#define FFA_ERROR _AC(0x84000060,U) +#define FFA_SUCCESS_32 _AC(0x84000061,U) +#define FFA_SUCCESS_64 _AC(0xC4000061,U) +#define FFA_INTERRUPT _AC(0x84000062,U) +#define FFA_VERSION _AC(0x84000063,U) +#define FFA_FEATURES _AC(0x84000064,U) +#define FFA_RX_ACQUIRE _AC(0x84000084,U) +#define FFA_RX_RELEASE _AC(0x84000065,U) +#define FFA_RXTX_MAP_32 _AC(0x84000066,U) +#define FFA_RXTX_MAP_64 _AC(0xC4000066,U) +#define FFA_RXTX_UNMAP _AC(0x84000067,U) +#define FFA_PARTITION_INFO_GET _AC(0x84000068,U) +#define FFA_ID_GET _AC(0x84000069,U) +#define FFA_SPM_ID_GET _AC(0x84000085,U) +#define FFA_MSG_WAIT _AC(0x8400006B,U) +#define FFA_MSG_YIELD _AC(0x8400006C,U) +#define FFA_MSG_RUN _AC(0x8400006D,U) +#define FFA_MSG_SEND2 _AC(0x84000086,U) +#define FFA_MSG_SEND_DIRECT_REQ_32 _AC(0x8400006F,U) +#define FFA_MSG_SEND_DIRECT_REQ_64 _AC(0xC400006F,U) +#define FFA_MSG_SEND_DIRECT_RESP_32 _AC(0x84000070,U) +#define FFA_MSG_SEND_DIRECT_RESP_64 _AC(0xC4000070,U) +#define FFA_MEM_DONATE_32 _AC(0x84000071,U) +#define FFA_MEM_DONATE_64 _AC(0xC4000071,U) +#define FFA_MEM_LEND_32 _AC(0x84000072,U) +#define FFA_MEM_LEND_64 _AC(0xC4000072,U) +#define FFA_MEM_SHARE_32 _AC(0x84000073,U) +#define FFA_MEM_SHARE_64 _AC(0xC4000073,U) +#define FFA_MEM_RETRIEVE_REQ_32 _AC(0x84000074,U) +#define FFA_MEM_RETRIEVE_REQ_64 _AC(0xC4000074,U) +#define FFA_MEM_RETRIEVE_RESP _AC(0x84000075,U) +#define FFA_MEM_RELINQUISH _AC(0x84000076,U) +#define FFA_MEM_RECLAIM _AC(0x84000077,U) +#define FFA_MEM_FRAG_RX _AC(0x8400007A,U) +#define FFA_MEM_FRAG_TX _AC(0x8400007B,U) +#define FFA_MSG_SEND _AC(0x8400006E,U) +#define FFA_MSG_POLL _AC(0x8400006A,U) + +/* Partition information descriptor */ +struct ffa_partition_info_1_0 { + uint16_t id; + uint16_t execution_context; + uint32_t partition_properties; +}; + +struct ffa_partition_info_1_1 { + uint16_t id; + uint16_t execution_context; + uint32_t partition_properties; + uint8_t uuid[16]; +}; + +/* Constituent memory region descriptor */ +struct ffa_address_range { + uint64_t address; + uint32_t page_count; + uint32_t reserved; +}; + +/* Composite memory region descriptor */ +struct ffa_mem_region { + uint32_t total_page_count; + uint32_t address_range_count; + uint64_t reserved; + struct ffa_address_range address_range_array[]; +}; + +/* Memory access permissions descriptor */ +struct ffa_mem_access_perm { + uint16_t endpoint_id; + uint8_t perm; + uint8_t flags; +}; + +/* Endpoint memory access descriptor */ +struct ffa_mem_access { + struct ffa_mem_access_perm access_perm; + uint32_t region_offs; + uint64_t reserved; +}; + +/* Lend, donate or share memory transaction descriptor */ +struct ffa_mem_transaction_1_0 { + uint16_t sender_id; + uint8_t mem_reg_attr; + uint8_t reserved0; + uint32_t flags; + uint64_t global_handle; + uint64_t tag; + uint32_t reserved1; + uint32_t mem_access_count; + struct ffa_mem_access mem_access_array[]; +}; + +struct ffa_mem_transaction_1_1 { + uint16_t sender_id; + uint16_t mem_reg_attr; + uint32_t flags; + uint64_t global_handle; + uint64_t tag; + uint32_t mem_access_size; + uint32_t mem_access_count; + uint32_t mem_access_offs; + uint8_t reserved[12]; +}; + +/* + * The parts needed from struct ffa_mem_transaction_1_0 or struct + * ffa_mem_transaction_1_1, used to provide an abstraction of difference in + * data structures between version 1.0 and 1.1. This is just an internal + * interface and can be changed without changing any ABI. + */ +struct ffa_mem_transaction_x { + uint16_t sender_id; + uint8_t mem_reg_attr; + uint8_t flags; + uint8_t mem_access_size; + uint8_t mem_access_count; + uint16_t mem_access_offs; + uint64_t global_handle; + uint64_t tag; +}; + +/* Endpoint RX/TX descriptor */ +struct ffa_endpoint_rxtx_descriptor_1_0 { + uint16_t sender_id; + uint16_t reserved; + uint32_t rx_range_count; + uint32_t tx_range_count; +}; + +struct ffa_endpoint_rxtx_descriptor_1_1 { + uint16_t sender_id; + uint16_t reserved; + uint32_t rx_region_offs; + uint32_t tx_region_offs; +}; + +struct ffa_ctx { + void *rx; + void *tx; + struct page_info *rx_pg; + struct page_info *tx_pg; + unsigned int page_count; + uint32_t guest_vers; + bool tx_is_mine; + bool interrupted; + struct list_head frag_list; + spinlock_t lock; +}; + +struct ffa_shm_mem { + struct list_head list; + uint16_t sender_id; + uint16_t ep_id; /* endpoint, the one lending */ + uint64_t handle; /* FFA_HANDLE_INVALID if not set yet */ + unsigned int page_count; + struct page_info *pages[]; +}; + +struct mem_frag_state { + struct list_head list; + struct ffa_shm_mem *shm; + uint32_t range_count; + unsigned int current_page_idx; + unsigned int frag_offset; + unsigned int range_offset; + uint8_t *buf; + unsigned int buf_size; + struct ffa_address_range range; +}; + +/* + * Our rx/rx buffer shared with the SPMC + */ +static uint32_t ffa_version; +static uint16_t *subsr_vm_created; +static unsigned int subsr_vm_created_count; +static uint16_t *subsr_vm_destroyed; +static unsigned int subsr_vm_destroyed_count; +static void *ffa_rx; +static void *ffa_tx; +static unsigned int ffa_page_count; +static DEFINE_SPINLOCK(ffa_buffer_lock); + +static LIST_HEAD(ffa_mem_list); +static DEFINE_SPINLOCK(ffa_mem_list_lock); + +static uint64_t next_handle = FFA_HANDLE_HYP_FLAG; + +static inline uint64_t reg_pair_to_64(uint32_t reg0, uint32_t reg1) +{ + return (uint64_t)reg0 << 32 | reg1; +} + +static void inline reg_pair_from_64(uint32_t *reg0, uint32_t *reg1, + uint64_t val) +{ + *reg0 = val >> 32; + *reg1 = val; +} + +static bool ffa_get_version(uint32_t *vers) +{ + const struct arm_smccc_1_2_regs arg = { + .a0 = FFA_VERSION, .a1 = FFA_MY_VERSION, + }; + struct arm_smccc_1_2_regs resp; + + arm_smccc_1_2_smc(&arg, &resp); + if ( resp.a0 == FFA_RET_NOT_SUPPORTED ) + { + printk(XENLOG_ERR "ffa: FFA_VERSION returned not supported\n"); + return false; + } + + *vers = resp.a0; + return true; +} + +static uint32_t get_ffa_ret_code(const struct arm_smccc_1_2_regs *resp) +{ + switch ( resp->a0 ) + { + case FFA_ERROR: + if ( resp->a2 ) + return resp->a2; + else + return FFA_RET_NOT_SUPPORTED; + case FFA_SUCCESS_32: + case FFA_SUCCESS_64: + return FFA_RET_OK; + default: + return FFA_RET_NOT_SUPPORTED; + } +} + +static uint32_t ffa_features(uint32_t id) +{ + const struct arm_smccc_1_2_regs arg = { .a0 = FFA_FEATURES, .a1 = id, }; + struct arm_smccc_1_2_regs resp; + + arm_smccc_1_2_smc(&arg, &resp); + return get_ffa_ret_code(&resp); +} + +static bool check_mandatory_feature(uint32_t id) +{ + uint32_t ret = ffa_features(id); + + if (ret) + printk(XENLOG_ERR "ffa: mandatory feature id %#x missing\n", id); + return !ret; +} + +static uint32_t ffa_rxtx_map(register_t tx_addr, register_t rx_addr, + uint32_t page_count) +{ + const struct arm_smccc_1_2_regs arg = { +#ifdef CONFIG_ARM_64 + .a0 = FFA_RXTX_MAP_64, +#endif +#ifdef CONFIG_ARM_32 + .a0 = FFA_RXTX_MAP_32, +#endif + .a1 = tx_addr, .a2 = rx_addr, + .a3 = page_count, + }; + struct arm_smccc_1_2_regs resp; + + arm_smccc_1_2_smc(&arg, &resp); + + return get_ffa_ret_code(&resp); +} + +static uint32_t ffa_rxtx_unmap(uint16_t vm_id) +{ + const struct arm_smccc_1_2_regs arg = { + .a0 = FFA_RXTX_UNMAP, .a1 = vm_id, + }; + struct arm_smccc_1_2_regs resp; + + arm_smccc_1_2_smc(&arg, &resp); + + return get_ffa_ret_code(&resp); +} + +static uint32_t ffa_partition_info_get(uint32_t w1, uint32_t w2, uint32_t w3, + uint32_t w4, uint32_t w5, + uint32_t *count) +{ + const struct arm_smccc_1_2_regs arg = { + .a0 = FFA_PARTITION_INFO_GET, .a1 = w1, .a2 = w2, .a3 = w3, .a4 = w4, + .a5 = w5, + }; + struct arm_smccc_1_2_regs resp; + uint32_t ret; + + arm_smccc_1_2_smc(&arg, &resp); + + ret = get_ffa_ret_code(&resp); + if ( !ret ) + *count = resp.a2; + + return ret; +} + +static uint32_t ffa_rx_release(void) +{ + const struct arm_smccc_1_2_regs arg = { .a0 = FFA_RX_RELEASE, }; + struct arm_smccc_1_2_regs resp; + + arm_smccc_1_2_smc(&arg, &resp); + + return get_ffa_ret_code(&resp); +} + +static int32_t ffa_mem_share(uint32_t tot_len, uint32_t frag_len, + register_t addr, uint32_t pg_count, + uint64_t *handle) +{ + struct arm_smccc_1_2_regs arg = { + .a0 = FFA_MEM_SHARE_32, .a1 = tot_len, .a2 = frag_len, .a3 = addr, + .a4 = pg_count, + }; + struct arm_smccc_1_2_regs resp; + + /* + * For arm64 we must use 64-bit calling convention if the buffer isn't + * passed in our tx buffer. + */ + if (sizeof(addr) > 4 && addr) + arg.a0 = FFA_MEM_SHARE_64; + + arm_smccc_1_2_smc(&arg, &resp); + + switch ( resp.a0 ) + { + case FFA_ERROR: + if ( resp.a2 ) + return resp.a2; + else + return FFA_RET_NOT_SUPPORTED; + case FFA_SUCCESS_32: + *handle = reg_pair_to_64(resp.a3, resp.a2); + return FFA_RET_OK; + case FFA_MEM_FRAG_RX: + *handle = reg_pair_to_64(resp.a2, resp.a1); + return resp.a3; + default: + return FFA_RET_NOT_SUPPORTED; + } +} + +static int32_t ffa_mem_frag_tx(uint64_t handle, uint32_t frag_len, + uint16_t sender_id) +{ + struct arm_smccc_1_2_regs arg = { + .a0 = FFA_MEM_FRAG_TX, .a1 = handle & UINT32_MAX, .a2 = handle >> 32, + .a3 = frag_len, .a4 = (uint32_t)sender_id << 16, + }; + struct arm_smccc_1_2_regs resp; + + arm_smccc_1_2_smc(&arg, &resp); + + switch ( resp.a0 ) + { + case FFA_ERROR: + if ( resp.a2 ) + return resp.a2; + else + return FFA_RET_NOT_SUPPORTED; + case FFA_SUCCESS_32: + return FFA_RET_OK; + case FFA_MEM_FRAG_RX: + return resp.a3; + default: + return FFA_RET_NOT_SUPPORTED; + } +} + +static uint32_t ffa_mem_reclaim(uint32_t handle_lo, uint32_t handle_hi, + uint32_t flags) +{ + const struct arm_smccc_1_2_regs arg = { + .a0 = FFA_MEM_RECLAIM, .a1 = handle_lo, .a2 = handle_hi, .a3 = flags, + }; + struct arm_smccc_1_2_regs resp; + + arm_smccc_1_2_smc(&arg, &resp); + + return get_ffa_ret_code(&resp); +} + +static int32_t ffa_direct_req_send_vm(uint16_t sp_id, uint16_t vm_id, + uint8_t msg) +{ + uint32_t exp_resp = FFA_MSG_FLAG_FRAMEWORK; + int32_t res; + + if ( msg != FFA_MSG_SEND_VM_CREATED && msg !=FFA_MSG_SEND_VM_DESTROYED ) + return FFA_RET_INVALID_PARAMETERS; + + if ( msg == FFA_MSG_SEND_VM_CREATED ) + exp_resp |= FFA_MSG_RESP_VM_CREATED; + else + exp_resp |= FFA_MSG_RESP_VM_DESTROYED; + + do { + const struct arm_smccc_1_2_regs arg = { + .a0 = FFA_MSG_SEND_DIRECT_REQ_32, + .a1 = sp_id, + .a2 = FFA_MSG_FLAG_FRAMEWORK | msg, + .a5 = vm_id, + }; + struct arm_smccc_1_2_regs resp; + + arm_smccc_1_2_smc(&arg, &resp); + if ( resp.a0 != FFA_MSG_SEND_DIRECT_RESP_32 || resp.a2 != exp_resp ) + { + /* + * This is an invalid response, likely due to some error in the + * implementation of the ABI. + */ + return FFA_RET_INVALID_PARAMETERS; + } + res = resp.a3; + } while ( res == FFA_RET_INTERRUPTED || res == FFA_RET_RETRY ); + + return res; +} + +static u16 get_vm_id(struct domain *d) +{ + /* +1 since 0 is reserved for the hypervisor in FF-A */ + return d->domain_id + 1; +} + +static void set_regs(struct cpu_user_regs *regs, register_t v0, register_t v1, + register_t v2, register_t v3, register_t v4, register_t v5, + register_t v6, register_t v7) +{ + set_user_reg(regs, 0, v0); + set_user_reg(regs, 1, v1); + set_user_reg(regs, 2, v2); + set_user_reg(regs, 3, v3); + set_user_reg(regs, 4, v4); + set_user_reg(regs, 5, v5); + set_user_reg(regs, 6, v6); + set_user_reg(regs, 7, v7); +} + +static void set_regs_error(struct cpu_user_regs *regs, uint32_t error_code) +{ + set_regs(regs, FFA_ERROR, 0, error_code, 0, 0, 0, 0, 0); +} + +static void set_regs_success(struct cpu_user_regs *regs, uint32_t w2, + uint32_t w3) +{ + set_regs(regs, FFA_SUCCESS_32, 0, w2, w3, 0, 0, 0, 0); +} + +static void set_regs_frag_rx(struct cpu_user_regs *regs, uint32_t handle_lo, + uint32_t handle_hi, uint32_t frag_offset, + uint16_t sender_id) +{ + set_regs(regs, FFA_MEM_FRAG_RX, handle_lo, handle_hi, frag_offset, + (uint32_t)sender_id << 16, 0, 0, 0); +} + +static void handle_version(struct cpu_user_regs *regs) +{ + struct domain *d = current->domain; + struct ffa_ctx *ctx = d->arch.ffa; + uint32_t vers = get_user_reg(regs, 1); + + if ( vers < FFA_VERSION_1_1 ) + vers = FFA_VERSION_1_0; + else + vers = FFA_VERSION_1_1; + + ctx->guest_vers = vers; + set_regs(regs, vers, 0, 0, 0, 0, 0, 0, 0); +} + +static uint32_t handle_rxtx_map(uint32_t fid, register_t tx_addr, + register_t rx_addr, uint32_t page_count) +{ + uint32_t ret = FFA_RET_INVALID_PARAMETERS; + struct domain *d = current->domain; + struct ffa_ctx *ctx = d->arch.ffa; + struct page_info *tx_pg; + struct page_info *rx_pg; + p2m_type_t t; + void *rx; + void *tx; + + if ( !smccc_is_conv_64(fid) ) + { + tx_addr &= UINT32_MAX; + rx_addr &= UINT32_MAX; + } + + /* For now to keep things simple, only deal with a single page */ + if ( page_count != 1 ) + return FFA_RET_NOT_SUPPORTED; + + /* Already mapped */ + if ( ctx->rx ) + return FFA_RET_DENIED; + + tx_pg = get_page_from_gfn(d, gaddr_to_gfn(tx_addr), &t, P2M_ALLOC); + if ( !tx_pg ) + return FFA_RET_INVALID_PARAMETERS; + /* Only normal RAM for now */ + if (t != p2m_ram_rw) + goto err_put_tx_pg; + + rx_pg = get_page_from_gfn(d, gaddr_to_gfn(rx_addr), &t, P2M_ALLOC); + if ( !tx_pg ) + goto err_put_tx_pg; + /* Only normal RAM for now */ + if ( t != p2m_ram_rw ) + goto err_put_rx_pg; + + tx = __map_domain_page_global(tx_pg); + if ( !tx ) + goto err_put_rx_pg; + + rx = __map_domain_page_global(rx_pg); + if ( !rx ) + goto err_unmap_tx; + + ctx->rx = rx; + ctx->tx = tx; + ctx->rx_pg = rx_pg; + ctx->tx_pg = tx_pg; + ctx->page_count = 1; + ctx->tx_is_mine = true; + return FFA_RET_OK; + +err_unmap_tx: + unmap_domain_page_global(tx); +err_put_rx_pg: + put_page(rx_pg); +err_put_tx_pg: + put_page(tx_pg); + return ret; +} + +static uint32_t handle_rxtx_unmap(void) +{ + struct domain *d = current->domain; + struct ffa_ctx *ctx = d->arch.ffa; + uint32_t ret; + + if ( !ctx->rx ) + return FFA_RET_INVALID_PARAMETERS; + + ret = ffa_rxtx_unmap(get_vm_id(d)); + if ( ret ) + return ret; + + unmap_domain_page_global(ctx->rx); + unmap_domain_page_global(ctx->tx); + put_page(ctx->rx_pg); + put_page(ctx->tx_pg); + ctx->rx = NULL; + ctx->tx = NULL; + ctx->rx_pg = NULL; + ctx->tx_pg = NULL; + ctx->page_count = 0; + ctx->tx_is_mine = false; + + return FFA_RET_OK; +} + +static uint32_t handle_partition_info_get(uint32_t w1, uint32_t w2, uint32_t w3, + uint32_t w4, uint32_t w5, + uint32_t *count) +{ + uint32_t ret = FFA_RET_DENIED; + struct domain *d = current->domain; + struct ffa_ctx *ctx = d->arch.ffa; + + if ( !ffa_page_count ) + return FFA_RET_DENIED; + + spin_lock(&ctx->lock); + if ( !ctx->page_count || !ctx->tx_is_mine ) + goto out; + ret = ffa_partition_info_get(w1, w2, w3, w4, w5, count); + if ( ret ) + goto out; + if ( ctx->guest_vers == FFA_VERSION_1_0 ) + { + size_t n; + struct ffa_partition_info_1_1 *src = ffa_rx; + struct ffa_partition_info_1_0 *dst = ctx->rx; + + for ( n = 0; n < *count; n++ ) + { + dst[n].id = src[n].id; + dst[n].execution_context = src[n].execution_context; + dst[n].partition_properties = src[n].partition_properties; + } + } + else + { + size_t sz = *count * sizeof(struct ffa_partition_info_1_1); + + memcpy(ctx->rx, ffa_rx, sz); + } + ffa_rx_release(); + ctx->tx_is_mine = false; +out: + spin_unlock(&ctx->lock); + + return ret; +} + +static uint32_t handle_rx_release(void) +{ + uint32_t ret = FFA_RET_DENIED; + struct domain *d = current->domain; + struct ffa_ctx *ctx = d->arch.ffa; + + spin_lock(&ctx->lock); + if ( !ctx->page_count || ctx->tx_is_mine ) + goto out; + ret = FFA_RET_OK; + ctx->tx_is_mine = true; +out: + spin_unlock(&ctx->lock); + + return ret; +} + +static void handle_msg_send_direct_req(struct cpu_user_regs *regs, uint32_t fid) +{ + struct arm_smccc_1_2_regs arg = { .a0 = fid, }; + struct arm_smccc_1_2_regs resp = { }; + struct domain *d = current->domain; + struct ffa_ctx *ctx = d->arch.ffa; + uint32_t src_dst; + uint64_t mask; + + if ( smccc_is_conv_64(fid) ) + mask = 0xffffffffffffffff; + else + mask = 0xffffffff; + + src_dst = get_user_reg(regs, 1); + if ( (src_dst >> 16) != get_vm_id(d) ) + { + resp.a0 = FFA_ERROR; + resp.a2 = FFA_RET_INVALID_PARAMETERS; + goto out; + } + + arg.a1 = src_dst; + arg.a2 = get_user_reg(regs, 2) & mask; + arg.a3 = get_user_reg(regs, 3) & mask; + arg.a4 = get_user_reg(regs, 4) & mask; + arg.a5 = get_user_reg(regs, 5) & mask; + arg.a6 = get_user_reg(regs, 6) & mask; + arg.a7 = get_user_reg(regs, 7) & mask; + + while ( true ) + { + arm_smccc_1_2_smc(&arg, &resp); + + switch ( resp.a0 ) + { + case FFA_INTERRUPT: + ctx->interrupted = true; + goto out; + case FFA_ERROR: + case FFA_SUCCESS_32: + case FFA_SUCCESS_64: + case FFA_MSG_SEND_DIRECT_RESP_32: + case FFA_MSG_SEND_DIRECT_RESP_64: + goto out; + default: + /* Bad fid, report back. */ + memset(&arg, 0, sizeof(arg)); + arg.a0 = FFA_ERROR; + arg.a1 = src_dst; + arg.a2 = FFA_RET_NOT_SUPPORTED; + continue; + } + } + +out: + set_user_reg(regs, 0, resp.a0); + set_user_reg(regs, 1, resp.a1 & mask); + set_user_reg(regs, 2, resp.a2 & mask); + set_user_reg(regs, 3, resp.a3 & mask); + set_user_reg(regs, 4, resp.a4 & mask); + set_user_reg(regs, 5, resp.a5 & mask); + set_user_reg(regs, 6, resp.a6 & mask); + set_user_reg(regs, 7, resp.a7 & mask); +} + +static int get_shm_pages(struct domain *d, struct ffa_shm_mem *shm, + struct ffa_address_range *range, uint32_t range_count, + unsigned int start_page_idx, + unsigned int *last_page_idx) +{ + unsigned int pg_idx = start_page_idx; + unsigned long gfn; + unsigned int n; + unsigned int m; + p2m_type_t t; + uint64_t addr; + + for ( n = 0; n < range_count; n++ ) + { + for ( m = 0; m < range[n].page_count; m++ ) + { + if ( pg_idx >= shm->page_count ) + return FFA_RET_INVALID_PARAMETERS; + + addr = read_atomic(&range[n].address); + gfn = gaddr_to_gfn(addr + m * PAGE_SIZE); + shm->pages[pg_idx] = get_page_from_gfn(d, gfn, &t, P2M_ALLOC); + if ( !shm->pages[pg_idx] ) + return FFA_RET_DENIED; + pg_idx++; + /* Only normal RAM for now */ + if ( t != p2m_ram_rw ) + return FFA_RET_DENIED; + } + } + + *last_page_idx = pg_idx; + + return FFA_RET_OK; +} + +static void put_shm_pages(struct ffa_shm_mem *shm) +{ + unsigned int n; + + for ( n = 0; n < shm->page_count && shm->pages[n]; n++ ) + { + put_page(shm->pages[n]); + shm->pages[n] = NULL; + } +} + +static void init_range(struct ffa_address_range *addr_range, + paddr_t pa) +{ + memset(addr_range, 0, sizeof(*addr_range)); + addr_range->address = pa; + addr_range->page_count = 1; +} + +static int share_shm(struct ffa_shm_mem *shm) +{ + uint32_t max_frag_len = ffa_page_count * PAGE_SIZE; + struct ffa_mem_transaction_1_1 *descr = ffa_tx; + struct ffa_mem_access *mem_access_array; + struct ffa_mem_region *region_descr; + struct ffa_address_range *addr_range; + paddr_t pa; + paddr_t last_pa; + unsigned int n; + uint32_t frag_len; + uint32_t tot_len; + int ret; + unsigned int range_count; + unsigned int range_base; + bool first; + + memset(descr, 0, sizeof(*descr)); + descr->sender_id = shm->sender_id; + descr->global_handle = shm->handle; + descr->mem_reg_attr = FFA_NORMAL_MEM_REG_ATTR; + descr->mem_access_count = 1; + descr->mem_access_size = sizeof(*mem_access_array); + descr->mem_access_offs = sizeof(*descr); + mem_access_array = (void *)(descr + 1); + region_descr = (void *)(mem_access_array + 1); + + memset(mem_access_array, 0, sizeof(*mem_access_array)); + mem_access_array[0].access_perm.endpoint_id = shm->ep_id; + mem_access_array[0].access_perm.perm = FFA_MEM_ACC_RW; + mem_access_array[0].region_offs = (vaddr_t)region_descr - (vaddr_t)ffa_tx; + + memset(region_descr, 0, sizeof(*region_descr)); + region_descr->total_page_count = shm->page_count; + + region_descr->address_range_count = 1; + last_pa = page_to_maddr(shm->pages[0]); + for ( n = 1; n < shm->page_count; last_pa = pa, n++ ) + { + pa = page_to_maddr(shm->pages[n]); + if ( last_pa + PAGE_SIZE == pa ) + { + continue; + } + region_descr->address_range_count++; + } + + tot_len = sizeof(*descr) + sizeof(*mem_access_array) + + sizeof(*region_descr) + + region_descr->address_range_count * sizeof(*addr_range); + + addr_range = region_descr->address_range_array; + frag_len = (vaddr_t)(addr_range + 1) - (vaddr_t)ffa_tx; + last_pa = page_to_maddr(shm->pages[0]); + init_range(addr_range, last_pa); + first = true; + range_count = 1; + range_base = 0; + for ( n = 1; n < shm->page_count; last_pa = pa, n++ ) + { + pa = page_to_maddr(shm->pages[n]); + if ( last_pa + PAGE_SIZE == pa ) + { + addr_range->page_count++; + continue; + } + + if ( frag_len == max_frag_len ) + { + if ( first ) + { + ret = ffa_mem_share(tot_len, frag_len, 0, 0, &shm->handle); + first = false; + } + else + { + ret = ffa_mem_frag_tx(shm->handle, frag_len, shm->sender_id); + } + if ( ret <= 0) + return ret; + range_base = range_count; + range_count = 0; + frag_len = sizeof(*addr_range); + addr_range = ffa_tx; + } + else + { + frag_len += sizeof(*addr_range); + addr_range++; + } + init_range(addr_range, pa); + range_count++; + } + + if ( first ) + return ffa_mem_share(tot_len, frag_len, 0, 0, &shm->handle); + else + return ffa_mem_frag_tx(shm->handle, frag_len, shm->sender_id); +} + +static int read_mem_transaction(uint32_t ffa_vers, void *buf, size_t blen, + struct ffa_mem_transaction_x *trans) +{ + uint16_t mem_reg_attr; + uint32_t flags; + uint32_t count; + uint32_t offs; + uint32_t size; + + if ( ffa_vers >= FFA_VERSION_1_1 ) + { + struct ffa_mem_transaction_1_1 *descr; + + if ( blen < sizeof(*descr) ) + return FFA_RET_INVALID_PARAMETERS; + + descr = buf; + trans->sender_id = read_atomic(&descr->sender_id); + mem_reg_attr = read_atomic(&descr->mem_reg_attr); + flags = read_atomic(&descr->flags); + trans->global_handle = read_atomic(&descr->global_handle); + trans->tag = read_atomic(&descr->tag); + + count = read_atomic(&descr->mem_access_count); + size = read_atomic(&descr->mem_access_size); + offs = read_atomic(&descr->mem_access_offs); + } + else + { + struct ffa_mem_transaction_1_0 *descr; + + if ( blen < sizeof(*descr) ) + return FFA_RET_INVALID_PARAMETERS; + + descr = buf; + trans->sender_id = read_atomic(&descr->sender_id); + mem_reg_attr = read_atomic(&descr->mem_reg_attr); + flags = read_atomic(&descr->flags); + trans->global_handle = read_atomic(&descr->global_handle); + trans->tag = read_atomic(&descr->tag); + + count = read_atomic(&descr->mem_access_count); + size = sizeof(struct ffa_mem_access); + offs = offsetof(struct ffa_mem_transaction_1_0, mem_access_array); + } + + if ( mem_reg_attr > UINT8_MAX || flags > UINT8_MAX || size > UINT8_MAX || + count > UINT8_MAX || offs > UINT16_MAX ) + return FFA_RET_INVALID_PARAMETERS; + + /* Check that the endpoint memory access descriptor array fits */ + if ( size * count + offs > blen ) + return FFA_RET_INVALID_PARAMETERS; + + trans->mem_reg_attr = mem_reg_attr; + trans->flags = flags; + trans->mem_access_size = size; + trans->mem_access_count = count; + trans->mem_access_offs = offs; + return 0; +} + +static int add_mem_share_frag(struct mem_frag_state *s, unsigned int offs, + unsigned int frag_len) +{ + struct domain *d = current->domain; + unsigned int o = offs; + unsigned int l; + int ret; + + if ( frag_len < o ) + return FFA_RET_INVALID_PARAMETERS; + + /* Fill up the first struct ffa_address_range */ + l = min_t(unsigned int, frag_len - o, sizeof(s->range) - s->range_offset); + memcpy((uint8_t *)&s->range + s->range_offset, s->buf + o, l); + s->range_offset += l; + o += l; + if ( s->range_offset != sizeof(s->range) ) + goto out; + s->range_offset = 0; + + while ( true ) + { + ret = get_shm_pages(d, s->shm, &s->range, 1, s->current_page_idx, + &s->current_page_idx); + if ( ret ) + return ret; + if ( s->range_count == 1 ) + return 0; + s->range_count--; + if ( frag_len - o < sizeof(s->range) ) + break; + memcpy(&s->range, s->buf + o, sizeof(s->range)); + o += sizeof(s->range); + } + + /* Collect any remaining bytes for the next struct ffa_address_range */ + s->range_offset = frag_len - o; + memcpy(&s->range, s->buf + o, frag_len - o); +out: + s->frag_offset += frag_len; + return s->frag_offset; +} + +static void handle_mem_share(struct cpu_user_regs *regs) +{ + uint32_t tot_len = get_user_reg(regs, 1); + uint32_t frag_len = get_user_reg(regs, 2); + uint64_t addr = get_user_reg(regs, 3); + uint32_t page_count = get_user_reg(regs, 4); + struct ffa_mem_transaction_x trans; + struct ffa_mem_access *mem_access; + struct ffa_mem_region *region_descr; + struct domain *d = current->domain; + struct ffa_ctx *ctx = d->arch.ffa; + struct ffa_shm_mem *shm = NULL; + unsigned int last_page_idx = 0; + uint32_t range_count; + uint32_t region_offs; + int ret = FFA_RET_DENIED; + uint32_t handle_hi = 0; + uint32_t handle_lo = 0; + + /* + * We're only accepting memory transaction descriptors via the rx/tx + * buffer. + */ + if ( addr ) + { + ret = FFA_RET_NOT_SUPPORTED; + goto out_unlock; + } + + /* Check that fragment legnth doesn't exceed total length */ + if ( frag_len > tot_len ) + { + ret = FFA_RET_INVALID_PARAMETERS; + goto out_unlock; + } + + spin_lock(&ctx->lock); + + if ( frag_len > ctx->page_count * PAGE_SIZE ) + goto out_unlock; + + if ( !ffa_page_count ) + { + ret = FFA_RET_NO_MEMORY; + goto out_unlock; + } + + ret = read_mem_transaction(ctx->guest_vers, ctx->tx, frag_len, &trans); + if ( ret ) + goto out_unlock; + + if ( trans.mem_reg_attr != FFA_NORMAL_MEM_REG_ATTR ) + { + ret = FFA_RET_NOT_SUPPORTED; + goto out; + } + + /* Only supports sharing it with one SP for now */ + if ( trans.mem_access_count != 1 ) + { + ret = FFA_RET_NOT_SUPPORTED; + goto out_unlock; + } + + if ( trans.sender_id != get_vm_id(d) ) + { + ret = FFA_RET_INVALID_PARAMETERS; + goto out_unlock; + } + + /* Check that it fits in the supplied data */ + if ( trans.mem_access_offs + trans.mem_access_size > frag_len ) + goto out_unlock; + + mem_access = (void *)((vaddr_t)ctx->tx + trans.mem_access_offs); + if ( read_atomic(&mem_access->access_perm.perm) != FFA_MEM_ACC_RW ) + { + ret = FFA_RET_NOT_SUPPORTED; + goto out_unlock; + } + + region_offs = read_atomic(&mem_access->region_offs); + if ( sizeof(*region_descr) + region_offs > frag_len ) + { + ret = FFA_RET_NOT_SUPPORTED; + goto out_unlock; + } + + region_descr = (void *)((vaddr_t)ctx->tx + region_offs); + range_count = read_atomic(®ion_descr->address_range_count); + page_count = read_atomic(®ion_descr->total_page_count); + + shm = xzalloc_flex_struct(struct ffa_shm_mem, pages, page_count); + if ( !shm ) + { + ret = FFA_RET_NO_MEMORY; + goto out; + } + shm->sender_id = trans.sender_id; + shm->ep_id = read_atomic(&mem_access->access_perm.endpoint_id); + shm->page_count = page_count; + + if ( frag_len != tot_len ) + { + struct mem_frag_state *s = xzalloc(struct mem_frag_state); + + if ( !s ) + { + ret = FFA_RET_NO_MEMORY; + goto out; + } + s->shm = shm; + s->range_count = range_count; + s->buf = ctx->tx; + s->buf_size = ffa_page_count * PAGE_SIZE; + ret = add_mem_share_frag(s, sizeof(*region_descr) + region_offs, + frag_len); + if ( ret <= 0 ) + { + xfree(s); + if ( ret < 0 ) + goto out; + } + else + { + shm->handle = next_handle++; + reg_pair_from_64(&handle_hi, &handle_lo, shm->handle); + list_add_tail(&s->list, &ctx->frag_list); + } + goto out_unlock; + } + + /* + * Check that the Composite memory region descriptor fits. + */ + if ( sizeof(*region_descr) + region_offs + + range_count * sizeof(struct ffa_address_range) > frag_len ) + { + ret = FFA_RET_INVALID_PARAMETERS; + goto out; + } + + ret = get_shm_pages(d, shm, region_descr->address_range_array, range_count, + 0, &last_page_idx); + if ( ret ) + goto out; + if ( last_page_idx != shm->page_count ) + { + ret = FFA_RET_INVALID_PARAMETERS; + goto out; + } + + /* Note that share_shm() uses our tx buffer */ + spin_lock(&ffa_buffer_lock); + ret = share_shm(shm); + spin_unlock(&ffa_buffer_lock); + if ( ret ) + goto out; + + spin_lock(&ffa_mem_list_lock); + list_add_tail(&shm->list, &ffa_mem_list); + spin_unlock(&ffa_mem_list_lock); + + reg_pair_from_64(&handle_hi, &handle_lo, shm->handle); + +out: + if ( ret && shm ) + { + put_shm_pages(shm); + xfree(shm); + } +out_unlock: + spin_unlock(&ctx->lock); + + if ( ret > 0 ) + set_regs_frag_rx(regs, handle_lo, handle_hi, ret, trans.sender_id); + else if ( ret == 0) + set_regs_success(regs, handle_lo, handle_hi); + else + set_regs_error(regs, ret); +} + +static struct mem_frag_state *find_frag_state(struct ffa_ctx *ctx, + uint64_t handle) +{ + struct mem_frag_state *s; + + list_for_each_entry(s, &ctx->frag_list, list) + if ( s->shm->handle == handle ) + return s; + + return NULL; +} + +static void handle_mem_frag_tx(struct cpu_user_regs *regs) +{ + struct domain *d = current->domain; + struct ffa_ctx *ctx = d->arch.ffa; + uint32_t frag_len = get_user_reg(regs, 3); + uint32_t handle_lo = get_user_reg(regs, 1); + uint32_t handle_hi = get_user_reg(regs, 2); + uint64_t handle = reg_pair_to_64(handle_hi, handle_lo); + struct mem_frag_state *s; + uint16_t sender_id = 0; + int ret; + + spin_lock(&ctx->lock); + s = find_frag_state(ctx, handle); + if ( !s ) + { + ret = FFA_RET_INVALID_PARAMETERS; + goto out; + } + sender_id = s->shm->sender_id; + + if ( frag_len > s->buf_size ) + { + ret = FFA_RET_INVALID_PARAMETERS; + goto out; + } + + ret = add_mem_share_frag(s, 0, frag_len); + if ( ret == 0 ) + { + /* Note that share_shm() uses our tx buffer */ + spin_lock(&ffa_buffer_lock); + ret = share_shm(s->shm); + spin_unlock(&ffa_buffer_lock); + if ( ret == 0 ) + { + spin_lock(&ffa_mem_list_lock); + list_add_tail(&s->shm->list, &ffa_mem_list); + spin_unlock(&ffa_mem_list_lock); + } + else + { + put_shm_pages(s->shm); + xfree(s->shm); + } + list_del(&s->list); + xfree(s); + } + else if ( ret < 0 ) + { + put_shm_pages(s->shm); + xfree(s->shm); + list_del(&s->list); + xfree(s); + } +out: + spin_unlock(&ctx->lock); + + if ( ret > 0 ) + set_regs_frag_rx(regs, handle_lo, handle_hi, ret, sender_id); + else if ( ret == 0) + set_regs_success(regs, handle_lo, handle_hi); + else + set_regs_error(regs, ret); +} + +static int handle_mem_reclaim(uint64_t handle, uint32_t flags) +{ + struct ffa_shm_mem *shm; + uint32_t handle_hi; + uint32_t handle_lo; + int ret; + + spin_lock(&ffa_mem_list_lock); + list_for_each_entry(shm, &ffa_mem_list, list) + { + if ( shm->handle == handle ) + goto found_it; + } + shm = NULL; +found_it: + spin_unlock(&ffa_mem_list_lock); + + if ( !shm ) + return FFA_RET_INVALID_PARAMETERS; + + reg_pair_from_64(&handle_hi, &handle_lo, handle); + ret = ffa_mem_reclaim(handle_lo, handle_hi, flags); + if ( ret ) + return ret; + + spin_lock(&ffa_mem_list_lock); + list_del(&shm->list); + spin_unlock(&ffa_mem_list_lock); + + put_shm_pages(shm); + xfree(shm); + + return ret; +} + +bool ffa_handle_call(struct cpu_user_regs *regs, uint32_t fid) +{ + struct domain *d = current->domain; + struct ffa_ctx *ctx = d->arch.ffa; + uint32_t count; + uint32_t e; + + if ( !ctx ) + return false; + + switch ( fid ) + { + case FFA_VERSION: + handle_version(regs); + return true; + case FFA_ID_GET: + set_regs_success(regs, get_vm_id(d), 0); + return true; + case FFA_RXTX_MAP_32: +#ifdef CONFIG_ARM_64 + case FFA_RXTX_MAP_64: +#endif + e = handle_rxtx_map(fid, get_user_reg(regs, 1), get_user_reg(regs, 2), + get_user_reg(regs, 3)); + if ( e ) + set_regs_error(regs, e); + else + set_regs_success(regs, 0, 0); + return true; + case FFA_RXTX_UNMAP: + e = handle_rxtx_unmap(); + if ( e ) + set_regs_error(regs, e); + else + set_regs_success(regs, 0, 0); + return true; + case FFA_PARTITION_INFO_GET: + e = handle_partition_info_get(get_user_reg(regs, 1), + get_user_reg(regs, 2), + get_user_reg(regs, 3), + get_user_reg(regs, 4), + get_user_reg(regs, 5), &count); + if ( e ) + set_regs_error(regs, e); + else + set_regs_success(regs, count, 0); + return true; + case FFA_RX_RELEASE: + e = handle_rx_release(); + if ( e ) + set_regs_error(regs, e); + else + set_regs_success(regs, 0, 0); + return true; + case FFA_MSG_SEND_DIRECT_REQ_32: +#ifdef CONFIG_ARM_64 + case FFA_MSG_SEND_DIRECT_REQ_64: +#endif + handle_msg_send_direct_req(regs, fid); + return true; + case FFA_MEM_SHARE_32: +#ifdef CONFIG_ARM_64 + case FFA_MEM_SHARE_64: +#endif + handle_mem_share(regs); + return true; + case FFA_MEM_RECLAIM: + e = handle_mem_reclaim(reg_pair_to_64(get_user_reg(regs, 2), + get_user_reg(regs, 1)), + get_user_reg(regs, 3)); + if ( e ) + set_regs_error(regs, e); + else + set_regs_success(regs, 0, 0); + return true; + case FFA_MEM_FRAG_TX: + handle_mem_frag_tx(regs); + return true; + + default: + printk(XENLOG_ERR "ffa: unhandled fid 0x%x\n", fid); + return false; + } +} + +int ffa_domain_init(struct domain *d, bool ffa_enabled) +{ + struct ffa_ctx *ctx; + unsigned int n; + unsigned int m; + unsigned int c_pos; + int32_t res; + + if ( !ffa_version || !ffa_enabled ) + return 0; + + ctx = xzalloc(struct ffa_ctx); + if ( !ctx ) + return -ENOMEM; + + for ( n = 0; n < subsr_vm_created_count; n++ ) + { + res = ffa_direct_req_send_vm(subsr_vm_created[n], get_vm_id(d), + FFA_MSG_SEND_VM_CREATED); + if ( res ) + { + printk(XENLOG_ERR "ffa: Failed to report creation of vm_id %u to %u: res %d\n", + get_vm_id(d), subsr_vm_created[n], res); + c_pos = n; + goto err; + } + } + + INIT_LIST_HEAD(&ctx->frag_list); + + d->arch.ffa = ctx; + + return 0; + +err: + /* Undo any already sent vm created messaged */ + for ( n = 0; n < c_pos; n++ ) + for ( m = 0; m < subsr_vm_destroyed_count; m++ ) + if ( subsr_vm_destroyed[m] == subsr_vm_created[n] ) + ffa_direct_req_send_vm(subsr_vm_destroyed[n], get_vm_id(d), + FFA_MSG_SEND_VM_DESTROYED); + return -ENOMEM; +} + +int ffa_relinquish_resources(struct domain *d) +{ + struct ffa_ctx *ctx = d->arch.ffa; + unsigned int n; + int32_t res; + + if ( !ctx ) + return 0; + + for ( n = 0; n < subsr_vm_destroyed_count; n++ ) + { + res = ffa_direct_req_send_vm(subsr_vm_destroyed[n], get_vm_id(d), + FFA_MSG_SEND_VM_DESTROYED); + + if ( res ) + printk(XENLOG_ERR "ffa: Failed to report destruction of vm_id %u to %u: res %d\n", + get_vm_id(d), subsr_vm_destroyed[n], res); + } + + XFREE(d->arch.ffa); + + return 0; +} + +static bool __init init_subscribers(void) +{ + struct ffa_partition_info_1_1 *fpi; + bool ret = false; + uint32_t count; + uint32_t e; + uint32_t n; + uint32_t c_pos; + uint32_t d_pos; + + if ( ffa_version < FFA_VERSION_1_1 ) + return true; + + e = ffa_partition_info_get(0, 0, 0, 0, 1, &count); + ffa_rx_release(); + if ( e ) + { + printk(XENLOG_ERR "ffa: Failed to get list of SPs: %d\n", (int)e); + goto out; + } + + fpi = ffa_rx; + subsr_vm_created_count = 0; + subsr_vm_destroyed_count = 0; + for ( n = 0; n < count; n++ ) + { + if (fpi[n].partition_properties & FFA_PART_PROP_NOTIF_CREATED) + subsr_vm_created_count++; + if (fpi[n].partition_properties & FFA_PART_PROP_NOTIF_DESTROYED) + subsr_vm_destroyed_count++; + } + + if ( subsr_vm_created_count ) + subsr_vm_created = xzalloc_array(uint16_t, subsr_vm_created_count); + if ( subsr_vm_destroyed_count ) + subsr_vm_destroyed = xzalloc_array(uint16_t, subsr_vm_destroyed_count); + if ( (subsr_vm_created_count && !subsr_vm_created) || + (subsr_vm_destroyed_count && !subsr_vm_destroyed) ) + { + printk(XENLOG_ERR "ffa: Failed to allocate subscription lists\n"); + subsr_vm_created_count = 0; + subsr_vm_destroyed_count = 0; + XFREE(subsr_vm_created); + XFREE(subsr_vm_destroyed); + goto out; + } + + for ( c_pos = 0, d_pos = 0, n = 0; n < count; n++ ) + { + if ( fpi[n].partition_properties & FFA_PART_PROP_NOTIF_CREATED ) + subsr_vm_created[c_pos++] = fpi[n].id; + if ( fpi[n].partition_properties & FFA_PART_PROP_NOTIF_DESTROYED ) + subsr_vm_destroyed[d_pos++] = fpi[n].id; + } + + ret = true; +out: + ffa_rx_release(); + return ret; +} + +static int __init ffa_init(void) +{ + uint32_t vers; + uint32_t e; + unsigned int major_vers; + unsigned int minor_vers; + + /* + * psci_init_smccc() updates this value with what's reported by EL-3 + * or secure world. + */ + if ( smccc_ver < ARM_SMCCC_VERSION_1_2 ) + { + printk(XENLOG_ERR + "ffa: unsupported SMCCC version %#x (need at least %#x)\n", + smccc_ver, ARM_SMCCC_VERSION_1_2); + return 0; + } + + if ( !ffa_get_version(&vers) ) + return 0; + + if ( vers < FFA_MIN_VERSION || vers > FFA_MY_VERSION ) + { + printk(XENLOG_ERR "ffa: Incompatible version %#x found\n", vers); + return 0; + } + + major_vers = (vers >> FFA_VERSION_MAJOR_SHIFT) & FFA_VERSION_MAJOR_MASK; + minor_vers = vers & FFA_VERSION_MINOR_MASK; + printk(XENLOG_INFO "ARM FF-A Mediator version %u.%u\n", + FFA_VERSION_MAJOR, FFA_VERSION_MINOR); + printk(XENLOG_INFO "ARM FF-A Firmware version %u.%u\n", + major_vers, minor_vers); + + if ( !check_mandatory_feature(FFA_PARTITION_INFO_GET) || + !check_mandatory_feature(FFA_RX_RELEASE) || +#ifdef CONFIG_ARM_64 + !check_mandatory_feature(FFA_RXTX_MAP_64) || + !check_mandatory_feature(FFA_MEM_SHARE_64) || +#endif +#ifdef CONFIG_ARM_32 + !check_mandatory_feature(FFA_RXTX_MAP_32) || +#endif + !check_mandatory_feature(FFA_RXTX_UNMAP) || + !check_mandatory_feature(FFA_MEM_SHARE_32) || + !check_mandatory_feature(FFA_MEM_FRAG_TX) || + !check_mandatory_feature(FFA_MEM_RECLAIM) || + !check_mandatory_feature(FFA_MSG_SEND_DIRECT_REQ_32) ) + return 0; + + ffa_rx = alloc_xenheap_pages(0, 0); + if ( !ffa_rx ) + return 0; + + ffa_tx = alloc_xenheap_pages(0, 0); + if ( !ffa_tx ) + goto err_free_ffa_rx; + + e = ffa_rxtx_map(__pa(ffa_tx), __pa(ffa_rx), 1); + if ( e ) + { + printk(XENLOG_ERR "ffa: Failed to map rxtx: error %d\n", (int)e); + goto err_free_ffa_tx; + } + ffa_page_count = 1; + ffa_version = vers; + + if ( !init_subscribers() ) + goto err_free_ffa_tx; + + return 0; + +err_free_ffa_tx: + free_xenheap_pages(ffa_tx, 0); + ffa_tx = NULL; +err_free_ffa_rx: + free_xenheap_pages(ffa_rx, 0); + ffa_rx = NULL; + ffa_page_count = 0; + ffa_version = 0; + XFREE(subsr_vm_created); + subsr_vm_created_count = 0; + XFREE(subsr_vm_destroyed); + subsr_vm_destroyed_count = 0; + return 0; +} + +__initcall(ffa_init); diff --git a/xen/arch/arm/include/asm/domain.h b/xen/arch/arm/include/asm/domain.h index ed63c2b6f91f..b3dee269bced 100644 --- a/xen/arch/arm/include/asm/domain.h +++ b/xen/arch/arm/include/asm/domain.h @@ -103,6 +103,10 @@ struct arch_domain void *tee; #endif +#ifdef CONFIG_FFA + void *ffa; +#endif + bool directmap; } __cacheline_aligned; diff --git a/xen/arch/arm/include/asm/ffa.h b/xen/arch/arm/include/asm/ffa.h new file mode 100644 index 000000000000..4f4a739345bd --- /dev/null +++ b/xen/arch/arm/include/asm/ffa.h @@ -0,0 +1,71 @@ +/* + * xen/arch/arm/ffa.c + * + * Arm Firmware Framework for ARMv8-A(FFA) mediator + * + * Copyright (C) 2021 Linaro Limited + * + * 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_ARM_FFA_H__ +#define __ASM_ARM_FFA_H__ + +#include <xen/const.h> + +#include <asm/smccc.h> +#include <asm/types.h> + +#define FFA_FNUM_MIN_VALUE _AC(0x60,U) +#define FFA_FNUM_MAX_VALUE _AC(0x86,U) + +static inline bool is_ffa_fid(uint32_t fid) +{ + uint32_t fn = fid & ARM_SMCCC_FUNC_MASK; + + return fn >= FFA_FNUM_MIN_VALUE && fn <= FFA_FNUM_MAX_VALUE; +} + +#ifdef CONFIG_FFA +#define FFA_NR_FUNCS 11 + +bool ffa_handle_call(struct cpu_user_regs *regs, uint32_t fid); +int ffa_domain_init(struct domain *d, bool ffa_enabled); +int ffa_relinquish_resources(struct domain *d); +#else +#define FFA_NR_FUNCS 0 + +static inline bool ffa_handle_call(struct cpu_user_regs *regs, uint32_t fid) +{ + return false; +} + +static inline int ffa_domain_init(struct domain *d, bool ffa_enabled) +{ + return 0; +} + +static inline int ffa_relinquish_resources(struct domain *d) +{ + return 0; +} +#endif + +#endif /*__ASM_ARM_FFA_H__*/ diff --git a/xen/arch/arm/vsmc.c b/xen/arch/arm/vsmc.c index 6f90c08a6304..34586025eff8 100644 --- a/xen/arch/arm/vsmc.c +++ b/xen/arch/arm/vsmc.c @@ -20,6 +20,7 @@ #include <public/arch-arm/smccc.h> #include <asm/cpuerrata.h> #include <asm/cpufeature.h> +#include <asm/ffa.h> #include <asm/monitor.h> #include <asm/regs.h> #include <asm/smccc.h> @@ -32,7 +33,7 @@ #define XEN_SMCCC_FUNCTION_COUNT 3 /* Number of functions currently supported by Standard Service Service Calls. */ -#define SSSC_SMCCC_FUNCTION_COUNT (3 + VPSCI_NR_FUNCS) +#define SSSC_SMCCC_FUNCTION_COUNT (3 + VPSCI_NR_FUNCS + FFA_NR_FUNCS) static bool fill_uid(struct cpu_user_regs *regs, xen_uuid_t uuid) { @@ -196,13 +197,23 @@ static bool handle_existing_apis(struct cpu_user_regs *regs) return do_vpsci_0_1_call(regs, fid); } +static bool is_psci_fid(uint32_t fid) +{ + uint32_t fn = fid & ARM_SMCCC_FUNC_MASK; + + return fn >= 0 && fn <= 0x1fU; +} + /* PSCI 0.2 interface and other Standard Secure Calls */ static bool handle_sssc(struct cpu_user_regs *regs) { uint32_t fid = (uint32_t)get_user_reg(regs, 0); - if ( do_vpsci_0_2_call(regs, fid) ) - return true; + if ( is_psci_fid(fid) ) + return do_vpsci_0_2_call(regs, fid); + + if ( is_ffa_fid(fid) ) + return ffa_handle_call(regs, fid); switch ( fid ) { diff --git a/xen/include/public/arch-arm.h b/xen/include/public/arch-arm.h index ab05fe12b0de..53f8d44a6a8e 100644 --- a/xen/include/public/arch-arm.h +++ b/xen/include/public/arch-arm.h @@ -318,6 +318,8 @@ struct xen_arch_domainconfig { /* IN/OUT */ uint8_t gic_version; /* IN */ + uint8_t ffa_enabled; + /* IN */ uint16_t tee_type; /* IN */ uint32_t nr_spis; -- 2.31.1
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