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[Xen-devel] [RFC PATCH 04/35] Hypervisor interface header files.

To: linux-kernel@xxxxxxxxxxxxxxx
Subject: [Xen-devel] [RFC PATCH 04/35] Hypervisor interface header files.
From: Chris Wright <chrisw@xxxxxxxxxxxx>
Date: Tue, 21 Mar 2006 22:30:44 -0800
Cc: virtualization@xxxxxxxxxxxxxx, Christian Limpach <Christian.Limpach@xxxxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxx, Ian Pratt <ian.pratt@xxxxxxxxxxxxx>
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Define macros and inline functions for doing hypercalls into the
hypervisor.

Signed-off-by: Ian Pratt <ian.pratt@xxxxxxxxxxxxx>
Signed-off-by: Christian Limpach <Christian.Limpach@xxxxxxxxxxxx>
Signed-off-by: Chris Wright <chrisw@xxxxxxxxxxxx>
---
 include/asm-i386/hypercall.h  |  306 ++++++++++++++++++++++++++++++++++++++++++
 include/asm-i386/hypervisor.h |   67 +++++++++
 2 files changed, 373 insertions(+)

--- /dev/null
+++ xen-subarch-2.6/include/asm-i386/hypercall.h
@@ -0,0 +1,306 @@
+/******************************************************************************
+ * hypercall.h
+ *
+ * Linux-specific hypervisor handling.
+ *
+ * Copyright (c) 2002-2004, K A Fraser
+ *
+ * This file may be distributed separately from the Linux kernel, or
+ * incorporated into other software packages, subject to the following license:
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this source file (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 __HYPERCALL_H__
+#define __HYPERCALL_H__
+
+#include <linux/config.h>
+
+#include <xen/interface/xen.h>
+#include <xen/interface/sched.h>
+
+#define __STR(x) #x
+#define STR(x) __STR(x)
+
+#define _hypercall0(type, name)                        \
+({                                             \
+       long __res;                             \
+       asm volatile (                          \
+               "call hypercall_page + ("STR(__HYPERVISOR_##name)" * 32)"\
+               : "=a" (__res)                  \
+               :                               \
+               : "memory" );                   \
+       (type)__res;                            \
+})
+
+#define _hypercall1(type, name, a1)                            \
+({                                                             \
+       long __res, __ign1;                                     \
+       asm volatile (                                          \
+               "call hypercall_page + ("STR(__HYPERVISOR_##name)" * 32)"\
+               : "=a" (__res), "=b" (__ign1)                   \
+               : "1" ((long)(a1))                              \
+               : "memory" );                                   \
+       (type)__res;                                            \
+})
+
+#define _hypercall2(type, name, a1, a2)                                \
+({                                                             \
+       long __res, __ign1, __ign2;                             \
+       asm volatile (                                          \
+               "call hypercall_page + ("STR(__HYPERVISOR_##name)" * 32)"\
+               : "=a" (__res), "=b" (__ign1), "=c" (__ign2)    \
+               : "1" ((long)(a1)), "2" ((long)(a2))            \
+               : "memory" );                                   \
+       (type)__res;                                            \
+})
+
+#define _hypercall3(type, name, a1, a2, a3)                    \
+({                                                             \
+       long __res, __ign1, __ign2, __ign3;                     \
+       asm volatile (                                          \
+               "call hypercall_page + ("STR(__HYPERVISOR_##name)" * 32)"\
+               : "=a" (__res), "=b" (__ign1), "=c" (__ign2),   \
+               "=d" (__ign3)                                   \
+               : "1" ((long)(a1)), "2" ((long)(a2)),           \
+               "3" ((long)(a3))                                \
+               : "memory" );                                   \
+       (type)__res;                                            \
+})
+
+#define _hypercall4(type, name, a1, a2, a3, a4)                        \
+({                                                             \
+       long __res, __ign1, __ign2, __ign3, __ign4;             \
+       asm volatile (                                          \
+               "call hypercall_page + ("STR(__HYPERVISOR_##name)" * 32)"\
+               : "=a" (__res), "=b" (__ign1), "=c" (__ign2),   \
+               "=d" (__ign3), "=S" (__ign4)                    \
+               : "1" ((long)(a1)), "2" ((long)(a2)),           \
+               "3" ((long)(a3)), "4" ((long)(a4))              \
+               : "memory" );                                   \
+       (type)__res;                                            \
+})
+
+#define _hypercall5(type, name, a1, a2, a3, a4, a5)            \
+({                                                             \
+       long __res, __ign1, __ign2, __ign3, __ign4, __ign5;     \
+       asm volatile (                                          \
+               "call hypercall_page + ("STR(__HYPERVISOR_##name)" * 32)"\
+               : "=a" (__res), "=b" (__ign1), "=c" (__ign2),   \
+               "=d" (__ign3), "=S" (__ign4), "=D" (__ign5)     \
+               : "1" ((long)(a1)), "2" ((long)(a2)),           \
+               "3" ((long)(a3)), "4" ((long)(a4)),             \
+               "5" ((long)(a5))                                \
+               : "memory" );                                   \
+       (type)__res;                                            \
+})
+
+static inline int
+HYPERVISOR_set_trap_table(
+       struct trap_info *table)
+{
+       return _hypercall1(int, set_trap_table, table);
+}
+
+static inline int
+HYPERVISOR_mmu_update(
+       struct mmu_update *req, int count, int *success_count, domid_t domid)
+{
+       return _hypercall4(int, mmu_update, req, count, success_count, domid);
+}
+
+static inline int
+HYPERVISOR_mmuext_op(
+       struct mmuext_op *op, int count, int *success_count, domid_t domid)
+{
+       return _hypercall4(int, mmuext_op, op, count, success_count, domid);
+}
+
+static inline int
+HYPERVISOR_set_gdt(
+       unsigned long *frame_list, int entries)
+{
+       return _hypercall2(int, set_gdt, frame_list, entries);
+}
+
+static inline int
+HYPERVISOR_stack_switch(
+       unsigned long ss, unsigned long esp)
+{
+       return _hypercall2(int, stack_switch, ss, esp);
+}
+
+static inline int
+HYPERVISOR_set_callbacks(
+       unsigned long event_selector, unsigned long event_address,
+       unsigned long failsafe_selector, unsigned long failsafe_address)
+{
+       return _hypercall4(int, set_callbacks,
+                          event_selector, event_address,
+                          failsafe_selector, failsafe_address);
+}
+
+static inline int
+HYPERVISOR_fpu_taskswitch(
+       int set)
+{
+       return _hypercall1(int, fpu_taskswitch, set);
+}
+
+static inline int
+HYPERVISOR_sched_op(
+       int cmd, unsigned long arg)
+{
+       return _hypercall2(int, sched_op, cmd, arg);
+}
+
+static inline long
+HYPERVISOR_set_timer_op(
+       u64 timeout)
+{
+       unsigned long timeout_hi = (unsigned long)(timeout>>32);
+       unsigned long timeout_lo = (unsigned long)timeout;
+       return _hypercall2(long, set_timer_op, timeout_lo, timeout_hi);
+}
+
+static inline int
+HYPERVISOR_set_debugreg(
+       int reg, unsigned long value)
+{
+       return _hypercall2(int, set_debugreg, reg, value);
+}
+
+static inline unsigned long
+HYPERVISOR_get_debugreg(
+       int reg)
+{
+       return _hypercall1(unsigned long, get_debugreg, reg);
+}
+
+static inline int
+HYPERVISOR_update_descriptor(
+       u64 ma, u64 desc)
+{
+       return _hypercall4(int, update_descriptor, ma, ma>>32, desc, desc>>32);
+}
+
+static inline int
+HYPERVISOR_memory_op(
+       unsigned int cmd, void *arg)
+{
+       return _hypercall2(int, memory_op, cmd, arg);
+}
+
+static inline int
+HYPERVISOR_multicall(
+       void *call_list, int nr_calls)
+{
+       return _hypercall2(int, multicall, call_list, nr_calls);
+}
+
+static inline int
+HYPERVISOR_update_va_mapping(
+       unsigned long va, pte_t new_val, unsigned long flags)
+{
+       unsigned long pte_hi = 0;
+#ifdef CONFIG_X86_PAE
+       pte_hi = new_val.pte_high;
+#endif
+       return _hypercall4(int, update_va_mapping, va,
+                          new_val.pte_low, pte_hi, flags);
+}
+
+static inline int
+HYPERVISOR_event_channel_op(
+       void *op)
+{
+       return _hypercall1(int, event_channel_op, op);
+}
+
+static inline int
+HYPERVISOR_xen_version(
+       int cmd, void *arg)
+{
+       return _hypercall2(int, xen_version, cmd, arg);
+}
+
+static inline int
+HYPERVISOR_console_io(
+       int cmd, int count, char *str)
+{
+       return _hypercall3(int, console_io, cmd, count, str);
+}
+
+static inline int
+HYPERVISOR_physdev_op(
+       void *physdev_op)
+{
+       return _hypercall1(int, physdev_op, physdev_op);
+}
+
+static inline int
+HYPERVISOR_grant_table_op(
+       unsigned int cmd, void *uop, unsigned int count)
+{
+       return _hypercall3(int, grant_table_op, cmd, uop, count);
+}
+
+static inline int
+HYPERVISOR_update_va_mapping_otherdomain(
+       unsigned long va, pte_t new_val, unsigned long flags, domid_t domid)
+{
+       unsigned long pte_hi = 0;
+#ifdef CONFIG_X86_PAE
+       pte_hi = new_val.pte_high;
+#endif
+       return _hypercall5(int, update_va_mapping_otherdomain, va,
+                          new_val.pte_low, pte_hi, flags, domid);
+}
+
+static inline int
+HYPERVISOR_vm_assist(
+       unsigned int cmd, unsigned int type)
+{
+       return _hypercall2(int, vm_assist, cmd, type);
+}
+
+static inline int
+HYPERVISOR_vcpu_op(
+       int cmd, int vcpuid, void *extra_args)
+{
+       return _hypercall3(int, vcpu_op, cmd, vcpuid, extra_args);
+}
+
+static inline int
+HYPERVISOR_suspend(
+       unsigned long srec)
+{
+       return _hypercall3(int, sched_op, SCHEDOP_shutdown,
+                          SHUTDOWN_suspend, srec);
+}
+
+static inline int
+HYPERVISOR_nmi_op(
+       unsigned long op,
+       unsigned long arg)
+{
+       return _hypercall2(int, nmi_op, op, arg);
+}
+
+#endif /* __HYPERCALL_H__ */
--- /dev/null
+++ xen-subarch-2.6/include/asm-i386/hypervisor.h
@@ -0,0 +1,67 @@
+/******************************************************************************
+ * hypervisor.h
+ *
+ * Linux-specific hypervisor handling.
+ *
+ * Copyright (c) 2002-2004, K A Fraser
+ *
+ * This file may be distributed separately from the Linux kernel, or
+ * incorporated into other software packages, subject to the following license:
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this source file (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 __HYPERVISOR_H__
+#define __HYPERVISOR_H__
+
+#include <linux/config.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/version.h>
+
+#include <xen/interface/xen.h>
+#include <xen/interface/version.h>
+#include <xen/features.h>
+
+#include <asm/ptrace.h>
+#include <asm/page.h>
+#if defined(__i386__)
+#  ifdef CONFIG_X86_PAE
+#   include <asm-generic/pgtable-nopud.h>
+#  else
+#   include <asm-generic/pgtable-nopmd.h>
+#  endif
+#endif
+
+/* arch/i386/kernel/setup.c */
+extern struct shared_info *HYPERVISOR_shared_info;
+extern struct start_info *xen_start_info;
+
+/* arch/i386/mach-xen/evtchn.c */
+/* Force a proper event-channel callback from Xen. */
+extern void force_evtchn_callback(void);
+
+/* Turn jiffies into Xen system time. */
+u64 jiffies_to_st(unsigned long jiffies);
+
+#include <asm/hypercall.h>
+
+#define xen_init()     (0)
+
+#endif /* __HYPERVISOR_H__ */

--

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