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/******************************************************************************
* hypercall.h
*
* Linux-specific hypervisor handling.
*
* Copyright (c) 2002-2004, K A Fraser
*
* 64-bit updates:
* Benjamin Liu <benjamin.liu@intel.com>
* Jun Nakajima <jun.nakajima@intel.com>
*
* 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; or, when 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 __MACHINE_XEN_HYPERCALL_H__
#define __MACHINE_XEN_HYPERCALL_H__
#include <sys/systm.h>
#ifndef __XEN_HYPERVISOR_H__
# error "please don't include this file directly"
#endif
#define __STR(x) #x
#define STR(x) __STR(x)
#define ENOXENSYS 38
#define CONFIG_XEN_COMPAT 0x030002
#define __must_check
#ifdef XEN
#define HYPERCALL_STR(name) \
"call hypercall_page + ("STR(__HYPERVISOR_##name)" * 32)"
#else
#define HYPERCALL_STR(name) \
"mov $("STR(__HYPERVISOR_##name)" * 32),%%eax; "\
"add hypercall_stubs(%%rip),%%rax; " \
"call *%%rax"
#endif
#define _hypercall0(type, name) \
({ \
type __res; \
__asm__ volatile ( \
HYPERCALL_STR(name) \
: "=a" (__res) \
: \
: "memory" ); \
__res; \
})
#define _hypercall1(type, name, a1) \
({ \
type __res; \
long __ign1; \
__asm__ volatile ( \
HYPERCALL_STR(name) \
: "=a" (__res), "=D" (__ign1) \
: "1" ((long)(a1)) \
: "memory" ); \
__res; \
})
#define _hypercall2(type, name, a1, a2) \
({ \
type __res; \
long __ign1, __ign2; \
__asm__ volatile ( \
HYPERCALL_STR(name) \
: "=a" (__res), "=D" (__ign1), "=S" (__ign2) \
: "1" ((long)(a1)), "2" ((long)(a2)) \
: "memory" ); \
__res; \
})
#define _hypercall3(type, name, a1, a2, a3) \
({ \
type __res; \
long __ign1, __ign2, __ign3; \
__asm__ volatile ( \
HYPERCALL_STR(name) \
: "=a" (__res), "=D" (__ign1), "=S" (__ign2), \
"=d" (__ign3) \
: "1" ((long)(a1)), "2" ((long)(a2)), \
"3" ((long)(a3)) \
: "memory" ); \
__res; \
})
#define _hypercall4(type, name, a1, a2, a3, a4) \
({ \
type __res; \
long __ign1, __ign2, __ign3; \
register long __arg4 __asm__("r10") = (long)(a4); \
__asm__ volatile ( \
HYPERCALL_STR(name) \
: "=a" (__res), "=D" (__ign1), "=S" (__ign2), \
"=d" (__ign3), "+r" (__arg4) \
: "1" ((long)(a1)), "2" ((long)(a2)), \
"3" ((long)(a3)) \
: "memory" ); \
__res; \
})
#define _hypercall5(type, name, a1, a2, a3, a4, a5) \
({ \
type __res; \
long __ign1, __ign2, __ign3; \
register long __arg4 __asm__("r10") = (long)(a4); \
register long __arg5 __asm__("r8") = (long)(a5); \
__asm__ volatile ( \
HYPERCALL_STR(name) \
: "=a" (__res), "=D" (__ign1), "=S" (__ign2), \
"=d" (__ign3), "+r" (__arg4), "+r" (__arg5) \
: "1" ((long)(a1)), "2" ((long)(a2)), \
"3" ((long)(a3)) \
: "memory" ); \
__res; \
})
static inline int __must_check
HYPERVISOR_set_trap_table(
const trap_info_t *table)
{
return _hypercall1(int, set_trap_table, table);
}
static inline int __must_check
HYPERVISOR_mmu_update(
mmu_update_t *req, unsigned int count, unsigned int *success_count,
domid_t domid)
{
return _hypercall4(int, mmu_update, req, count, success_count, domid);
}
static inline int __must_check
HYPERVISOR_mmuext_op(
struct mmuext_op *op, unsigned int count, unsigned int *success_count,
domid_t domid)
{
return _hypercall4(int, mmuext_op, op, count, success_count, domid);
}
static inline int __must_check
HYPERVISOR_set_gdt(
unsigned long *frame_list, unsigned int entries)
{
return _hypercall2(int, set_gdt, frame_list, entries);
}
static inline int __must_check
HYPERVISOR_stack_switch(
unsigned long ss, unsigned long esp)
{
return _hypercall2(int, stack_switch, ss, esp);
}
static inline int __must_check
HYPERVISOR_set_callbacks(
unsigned long event_address, unsigned long failsafe_address,
unsigned long syscall_address)
{
return _hypercall3(int, set_callbacks,
event_address, failsafe_address, syscall_address);
}
static inline int
HYPERVISOR_fpu_taskswitch(
int set)
{
return _hypercall1(int, fpu_taskswitch, set);
}
static inline int __must_check
HYPERVISOR_sched_op_compat(
int cmd, unsigned long arg)
{
return _hypercall2(int, sched_op_compat, cmd, arg);
}
static inline int __must_check
HYPERVISOR_sched_op(
int cmd, void *arg)
{
return _hypercall2(int, sched_op, cmd, arg);
}
static inline long __must_check
HYPERVISOR_set_timer_op(
uint64_t timeout)
{
return _hypercall1(long, set_timer_op, timeout);
}
static inline int __must_check
HYPERVISOR_platform_op(
struct xen_platform_op *platform_op)
{
platform_op->interface_version = XENPF_INTERFACE_VERSION;
return _hypercall1(int, platform_op, platform_op);
}
static inline int __must_check
HYPERVISOR_set_debugreg(
unsigned int reg, unsigned long value)
{
return _hypercall2(int, set_debugreg, reg, value);
}
static inline unsigned long __must_check
HYPERVISOR_get_debugreg(
unsigned int reg)
{
return _hypercall1(unsigned long, get_debugreg, reg);
}
static inline int __must_check
HYPERVISOR_update_descriptor(
unsigned long ma, unsigned long word)
{
return _hypercall2(int, update_descriptor, ma, word);
}
static inline int __must_check
HYPERVISOR_memory_op(
unsigned int cmd, void *arg)
{
return _hypercall2(int, memory_op, cmd, arg);
}
static inline int __must_check
HYPERVISOR_multicall(
multicall_entry_t *call_list, unsigned int nr_calls)
{
return _hypercall2(int, multicall, call_list, nr_calls);
}
static inline int __must_check
HYPERVISOR_update_va_mapping(
unsigned long va, uint64_t new_val, unsigned long flags)
{
return _hypercall3(int, update_va_mapping, va, new_val, flags);
}
static inline int __must_check
HYPERVISOR_event_channel_op(
int cmd, void *arg)
{
int rc = _hypercall2(int, event_channel_op, cmd, arg);
#if CONFIG_XEN_COMPAT <= 0x030002
if (unlikely(rc == -ENOXENSYS)) {
struct evtchn_op op;
op.cmd = cmd;
memcpy(&op.u, arg, sizeof(op.u));
rc = _hypercall1(int, event_channel_op_compat, &op);
memcpy(arg, &op.u, sizeof(op.u));
}
#endif
return rc;
}
static inline int __must_check
HYPERVISOR_xen_version(
int cmd, void *arg)
{
return _hypercall2(int, xen_version, cmd, arg);
}
static inline int __must_check
HYPERVISOR_console_io(
int cmd, unsigned int count, char *str)
{
return _hypercall3(int, console_io, cmd, count, str);
}
static inline int __must_check
HYPERVISOR_physdev_op(
int cmd, void *arg)
{
int rc = _hypercall2(int, physdev_op, cmd, arg);
#if CONFIG_XEN_COMPAT <= 0x030002
if (unlikely(rc == -ENOXENSYS)) {
struct physdev_op op;
op.cmd = cmd;
memcpy(&op.u, arg, sizeof(op.u));
rc = _hypercall1(int, physdev_op_compat, &op);
memcpy(arg, &op.u, sizeof(op.u));
}
#endif
return rc;
}
static inline int __must_check
HYPERVISOR_grant_table_op(
unsigned int cmd, void *uop, unsigned int count)
{
return _hypercall3(int, grant_table_op, cmd, uop, count);
}
static inline int __must_check
HYPERVISOR_update_va_mapping_otherdomain(
unsigned long va, uint64_t new_val, unsigned long flags, domid_t domid)
{
return _hypercall4(int, update_va_mapping_otherdomain, va,
new_val, flags, domid);
}
static inline int __must_check
HYPERVISOR_vm_assist(
unsigned int cmd, unsigned int type)
{
return _hypercall2(int, vm_assist, cmd, type);
}
static inline int __must_check
HYPERVISOR_vcpu_op(
int cmd, unsigned int vcpuid, void *extra_args)
{
return _hypercall3(int, vcpu_op, cmd, vcpuid, extra_args);
}
static inline int __must_check
HYPERVISOR_set_segment_base(
int reg, unsigned long value)
{
return _hypercall2(int, set_segment_base, reg, value);
}
static inline int __must_check
HYPERVISOR_suspend(
unsigned long srec)
{
struct sched_shutdown sched_shutdown = {
.reason = SHUTDOWN_suspend
};
int rc = _hypercall3(int, sched_op, SCHEDOP_shutdown,
&sched_shutdown, srec);
#if CONFIG_XEN_COMPAT <= 0x030002
if (rc == -ENOXENSYS)
rc = _hypercall3(int, sched_op_compat, SCHEDOP_shutdown,
SHUTDOWN_suspend, srec);
#endif
return rc;
}
#if CONFIG_XEN_COMPAT <= 0x030002
static inline int
HYPERVISOR_nmi_op(
unsigned long op, void *arg)
{
return _hypercall2(int, nmi_op, op, arg);
}
#endif
#ifndef CONFIG_XEN
static inline unsigned long __must_check
HYPERVISOR_hvm_op(
int op, void *arg)
{
return _hypercall2(unsigned long, hvm_op, op, arg);
}
#endif
static inline int __must_check
HYPERVISOR_callback_op(
int cmd, const void *arg)
{
return _hypercall2(int, callback_op, cmd, arg);
}
static inline int __must_check
HYPERVISOR_xenoprof_op(
int op, void *arg)
{
return _hypercall2(int, xenoprof_op, op, arg);
}
static inline int __must_check
HYPERVISOR_kexec_op(
unsigned long op, void *args)
{
return _hypercall2(int, kexec_op, op, args);
}
#undef __must_check
#endif /* __MACHINE_XEN_HYPERCALL_H__ */