[mirror_ubuntu-artful-kernel.git] / arch / x86 / include / asm / xen / hypercall.h

/******************************************************************************
 * hypercall.h
 *
 * Linux-specific hypervisor handling.
 *
 * Copyright (c) 2002-2004, K A Fraser
 *
 * 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 _ASM_X86_XEN_HYPERCALL_H
#define _ASM_X86_XEN_HYPERCALL_H

#include <linux/kernel.h>
#include <linux/spinlock.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/types.h>

#include <trace/events/xen.h>

#include <asm/page.h>
#include <asm/pgtable.h>

#include <xen/interface/xen.h>
#include <xen/interface/sched.h>
#include <xen/interface/physdev.h>
#include <xen/interface/platform.h>
#include <xen/interface/xen-mca.h>

/*
 * The hypercall asms have to meet several constraints:
 * - Work on 32- and 64-bit.
 *    The two architectures put their arguments in different sets of
 *    registers.
 *
 * - Work around asm syntax quirks
 *    It isn't possible to specify one of the rNN registers in a
 *    constraint, so we use explicit register variables to get the
 *    args into the right place.
 *
 * - Mark all registers as potentially clobbered
 *    Even unused parameters can be clobbered by the hypervisor, so we
 *    need to make sure gcc knows it.
 *
 * - Avoid compiler bugs.
 *    This is the tricky part.  Because x86_32 has such a constrained
 *    register set, gcc versions below 4.3 have trouble generating
 *    code when all the arg registers and memory are trashed by the
 *    asm.  There are syntactically simpler ways of achieving the
 *    semantics below, but they cause the compiler to crash.
 *
 *    The only combination I found which works is:
 *     - assign the __argX variables first
 *     - list all actually used parameters as "+r" (__argX)
 *     - clobber the rest
 *
 * The result certainly isn't pretty, and it really shows up cpp's
 * weakness as as macro language.  Sorry.  (But let's just give thanks
 * there aren't more than 5 arguments...)
 */

extern struct { char _entry[32]; } hypercall_page[];

#define __HYPERCALL		"call hypercall_page+%c[offset]"
#define __HYPERCALL_ENTRY(x)						\
	[offset] "i" (__HYPERVISOR_##x * sizeof(hypercall_page[0]))

#ifdef CONFIG_X86_32
#define __HYPERCALL_RETREG	"eax"
#define __HYPERCALL_ARG1REG	"ebx"
#define __HYPERCALL_ARG2REG	"ecx"
#define __HYPERCALL_ARG3REG	"edx"
#define __HYPERCALL_ARG4REG	"esi"
#define __HYPERCALL_ARG5REG	"edi"
#else
#define __HYPERCALL_RETREG	"rax"
#define __HYPERCALL_ARG1REG	"rdi"
#define __HYPERCALL_ARG2REG	"rsi"
#define __HYPERCALL_ARG3REG	"rdx"
#define __HYPERCALL_ARG4REG	"r10"
#define __HYPERCALL_ARG5REG	"r8"
#endif

#define __HYPERCALL_DECLS						\
	register unsigned long __res  asm(__HYPERCALL_RETREG);		\
	register unsigned long __arg1 asm(__HYPERCALL_ARG1REG) = __arg1; \
	register unsigned long __arg2 asm(__HYPERCALL_ARG2REG) = __arg2; \
	register unsigned long __arg3 asm(__HYPERCALL_ARG3REG) = __arg3; \
	register unsigned long __arg4 asm(__HYPERCALL_ARG4REG) = __arg4; \
	register unsigned long __arg5 asm(__HYPERCALL_ARG5REG) = __arg5; \
	register void *__sp asm(_ASM_SP);

#define __HYPERCALL_0PARAM	"=r" (__res), "+r" (__sp)
#define __HYPERCALL_1PARAM	__HYPERCALL_0PARAM, "+r" (__arg1)
#define __HYPERCALL_2PARAM	__HYPERCALL_1PARAM, "+r" (__arg2)
#define __HYPERCALL_3PARAM	__HYPERCALL_2PARAM, "+r" (__arg3)
#define __HYPERCALL_4PARAM	__HYPERCALL_3PARAM, "+r" (__arg4)
#define __HYPERCALL_5PARAM	__HYPERCALL_4PARAM, "+r" (__arg5)

#define __HYPERCALL_0ARG()
#define __HYPERCALL_1ARG(a1)						\
	__HYPERCALL_0ARG()		__arg1 = (unsigned long)(a1);
#define __HYPERCALL_2ARG(a1,a2)						\
	__HYPERCALL_1ARG(a1)		__arg2 = (unsigned long)(a2);
#define __HYPERCALL_3ARG(a1,a2,a3)					\
	__HYPERCALL_2ARG(a1,a2)		__arg3 = (unsigned long)(a3);
#define __HYPERCALL_4ARG(a1,a2,a3,a4)					\
	__HYPERCALL_3ARG(a1,a2,a3)	__arg4 = (unsigned long)(a4);
#define __HYPERCALL_5ARG(a1,a2,a3,a4,a5)				\
	__HYPERCALL_4ARG(a1,a2,a3,a4)	__arg5 = (unsigned long)(a5);

#define __HYPERCALL_CLOBBER5	"memory"
#define __HYPERCALL_CLOBBER4	__HYPERCALL_CLOBBER5, __HYPERCALL_ARG5REG
#define __HYPERCALL_CLOBBER3	__HYPERCALL_CLOBBER4, __HYPERCALL_ARG4REG
#define __HYPERCALL_CLOBBER2	__HYPERCALL_CLOBBER3, __HYPERCALL_ARG3REG
#define __HYPERCALL_CLOBBER1	__HYPERCALL_CLOBBER2, __HYPERCALL_ARG2REG
#define __HYPERCALL_CLOBBER0	__HYPERCALL_CLOBBER1, __HYPERCALL_ARG1REG

#define _hypercall0(type, name)						\
({									\
	__HYPERCALL_DECLS;						\
	__HYPERCALL_0ARG();						\
	asm volatile (__HYPERCALL					\
		      : __HYPERCALL_0PARAM				\
		      : __HYPERCALL_ENTRY(name)				\
		      : __HYPERCALL_CLOBBER0);				\
	(type)__res;							\
})

#define _hypercall1(type, name, a1)					\
({									\
	__HYPERCALL_DECLS;						\
	__HYPERCALL_1ARG(a1);						\
	asm volatile (__HYPERCALL					\
		      : __HYPERCALL_1PARAM				\
		      : __HYPERCALL_ENTRY(name)				\
		      : __HYPERCALL_CLOBBER1);				\
	(type)__res;							\
})

#define _hypercall2(type, name, a1, a2)					\
({									\
	__HYPERCALL_DECLS;						\
	__HYPERCALL_2ARG(a1, a2);					\
	asm volatile (__HYPERCALL					\
		      : __HYPERCALL_2PARAM				\
		      : __HYPERCALL_ENTRY(name)				\
		      : __HYPERCALL_CLOBBER2);				\
	(type)__res;							\
})

#define _hypercall3(type, name, a1, a2, a3)				\
({									\
	__HYPERCALL_DECLS;						\
	__HYPERCALL_3ARG(a1, a2, a3);					\
	asm volatile (__HYPERCALL					\
		      : __HYPERCALL_3PARAM				\
		      : __HYPERCALL_ENTRY(name)				\
		      : __HYPERCALL_CLOBBER3);				\
	(type)__res;							\
})

#define _hypercall4(type, name, a1, a2, a3, a4)				\
({									\
	__HYPERCALL_DECLS;						\
	__HYPERCALL_4ARG(a1, a2, a3, a4);				\
	asm volatile (__HYPERCALL					\
		      : __HYPERCALL_4PARAM				\
		      : __HYPERCALL_ENTRY(name)				\
		      : __HYPERCALL_CLOBBER4);				\
	(type)__res;							\
})

#define _hypercall5(type, name, a1, a2, a3, a4, a5)			\
({									\
	__HYPERCALL_DECLS;						\
	__HYPERCALL_5ARG(a1, a2, a3, a4, a5);				\
	asm volatile (__HYPERCALL					\
		      : __HYPERCALL_5PARAM				\
		      : __HYPERCALL_ENTRY(name)				\
		      : __HYPERCALL_CLOBBER5);				\
	(type)__res;							\
})

static inline long
privcmd_call(unsigned call,
	     unsigned long a1, unsigned long a2,
	     unsigned long a3, unsigned long a4,
	     unsigned long a5)
{
	__HYPERCALL_DECLS;
	__HYPERCALL_5ARG(a1, a2, a3, a4, a5);

	asm volatile("call *%[call]"
		     : __HYPERCALL_5PARAM
		     : [call] "a" (&hypercall_page[call])
		     : __HYPERCALL_CLOBBER5);

	return (long)__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);
}

#ifdef CONFIG_X86_32
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);
}
#else  /* CONFIG_X86_64 */
static inline int
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);
}
#endif  /* CONFIG_X86_{32,64} */

static inline int
HYPERVISOR_callback_op(int cmd, void *arg)
{
	return _hypercall2(int, callback_op, cmd, arg);
}

static inline int
HYPERVISOR_fpu_taskswitch(int set)
{
	return _hypercall1(int, fpu_taskswitch, set);
}

static inline int
HYPERVISOR_sched_op(int cmd, void *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_mca(struct xen_mc *mc_op)
{
	mc_op->interface_version = XEN_MCA_INTERFACE_VERSION;
	return _hypercall1(int, mca, mc_op);
}

static inline int
HYPERVISOR_platform_op(struct xen_platform_op *op)
{
	op->interface_version = XENPF_INTERFACE_VERSION;
	return _hypercall1(int, platform_op, op);
}

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)
{
	if (sizeof(u64) == sizeof(long))
		return _hypercall2(int, update_descriptor, ma, desc);
	return _hypercall4(int, update_descriptor, ma, ma>>32, desc, desc>>32);
}

static inline long
HYPERVISOR_memory_op(unsigned int cmd, void *arg)
{
	return _hypercall2(long, memory_op, cmd, arg);
}

static inline int
HYPERVISOR_multicall(void *call_list, uint32_t 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)
{
	if (sizeof(new_val) == sizeof(long))
		return _hypercall3(int, update_va_mapping, va,
				   new_val.pte, flags);
	else
		return _hypercall4(int, update_va_mapping, va,
				   new_val.pte, new_val.pte >> 32, flags);
}
extern int __must_check xen_event_channel_op_compat(int, void *);

static inline int
HYPERVISOR_event_channel_op(int cmd, void *arg)
{
	int rc = _hypercall2(int, event_channel_op, cmd, arg);
	if (unlikely(rc == -ENOSYS))
		rc = xen_event_channel_op_compat(cmd, arg);
	return rc;
}

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);
}

extern int __must_check xen_physdev_op_compat(int, void *);

static inline int
HYPERVISOR_physdev_op(int cmd, void *arg)
{
	int rc = _hypercall2(int, physdev_op, cmd, arg);
	if (unlikely(rc == -ENOSYS))
		rc = xen_physdev_op_compat(cmd, arg);
	return rc;
}

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)
{
	if (sizeof(new_val) == sizeof(long))
		return _hypercall4(int, update_va_mapping_otherdomain, va,
				   new_val.pte, flags, domid);
	else
		return _hypercall5(int, update_va_mapping_otherdomain, va,
				   new_val.pte, new_val.pte >> 32,
				   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);
}

#ifdef CONFIG_X86_64
static inline int
HYPERVISOR_set_segment_base(int reg, unsigned long value)
{
	return _hypercall2(int, set_segment_base, reg, value);
}
#endif

static inline int
HYPERVISOR_suspend(unsigned long start_info_mfn)
{
	struct sched_shutdown r = { .reason = SHUTDOWN_suspend };

	/*
	 * For a PV guest the tools require that the start_info mfn be
	 * present in rdx/edx when the hypercall is made. Per the
	 * hypercall calling convention this is the third hypercall
	 * argument, which is start_info_mfn here.
	 */
	return _hypercall3(int, sched_op, SCHEDOP_shutdown, &r, start_info_mfn);
}

static inline int
HYPERVISOR_nmi_op(unsigned long op, unsigned long arg)
{
	return _hypercall2(int, nmi_op, op, arg);
}

static inline unsigned long __must_check
HYPERVISOR_hvm_op(int op, void *arg)
{
       return _hypercall2(unsigned long, hvm_op, op, arg);
}

static inline int
HYPERVISOR_tmem_op(
	struct tmem_op *op)
{
	return _hypercall1(int, tmem_op, op);
}

static inline int
HYPERVISOR_xenpmu_op(unsigned int op, void *arg)
{
	return _hypercall2(int, xenpmu_op, op, arg);
}

static inline int
HYPERVISOR_dm_op(
	domid_t dom, unsigned int nr_bufs, void *bufs)
{
	return _hypercall3(int, dm_op, dom, nr_bufs, bufs);
}

static inline void
MULTI_fpu_taskswitch(struct multicall_entry *mcl, int set)
{
	mcl->op = __HYPERVISOR_fpu_taskswitch;
	mcl->args[0] = set;

	trace_xen_mc_entry(mcl, 1);
}

static inline void
MULTI_update_va_mapping(struct multicall_entry *mcl, unsigned long va,
			pte_t new_val, unsigned long flags)
{
	mcl->op = __HYPERVISOR_update_va_mapping;
	mcl->args[0] = va;
	if (sizeof(new_val) == sizeof(long)) {
		mcl->args[1] = new_val.pte;
		mcl->args[2] = flags;
	} else {
		mcl->args[1] = new_val.pte;
		mcl->args[2] = new_val.pte >> 32;
		mcl->args[3] = flags;
	}

	trace_xen_mc_entry(mcl, sizeof(new_val) == sizeof(long) ? 3 : 4);
}

static inline void
MULTI_grant_table_op(struct multicall_entry *mcl, unsigned int cmd,
		     void *uop, unsigned int count)
{
	mcl->op = __HYPERVISOR_grant_table_op;
	mcl->args[0] = cmd;
	mcl->args[1] = (unsigned long)uop;
	mcl->args[2] = count;

	trace_xen_mc_entry(mcl, 3);
}

static inline void
MULTI_update_va_mapping_otherdomain(struct multicall_entry *mcl, unsigned long va,
				    pte_t new_val, unsigned long flags,
				    domid_t domid)
{
	mcl->op = __HYPERVISOR_update_va_mapping_otherdomain;
	mcl->args[0] = va;
	if (sizeof(new_val) == sizeof(long)) {
		mcl->args[1] = new_val.pte;
		mcl->args[2] = flags;
		mcl->args[3] = domid;
	} else {
		mcl->args[1] = new_val.pte;
		mcl->args[2] = new_val.pte >> 32;
		mcl->args[3] = flags;
		mcl->args[4] = domid;
	}

	trace_xen_mc_entry(mcl, sizeof(new_val) == sizeof(long) ? 4 : 5);
}

static inline void
MULTI_update_descriptor(struct multicall_entry *mcl, u64 maddr,
			struct desc_struct desc)
{
	mcl->op = __HYPERVISOR_update_descriptor;
	if (sizeof(maddr) == sizeof(long)) {
		mcl->args[0] = maddr;
		mcl->args[1] = *(unsigned long *)&desc;
	} else {
		mcl->args[0] = maddr;
		mcl->args[1] = maddr >> 32;
		mcl->args[2] = desc.a;
		mcl->args[3] = desc.b;
	}

	trace_xen_mc_entry(mcl, sizeof(maddr) == sizeof(long) ? 2 : 4);
}

static inline void
MULTI_memory_op(struct multicall_entry *mcl, unsigned int cmd, void *arg)
{
	mcl->op = __HYPERVISOR_memory_op;
	mcl->args[0] = cmd;
	mcl->args[1] = (unsigned long)arg;

	trace_xen_mc_entry(mcl, 2);
}

static inline void
MULTI_mmu_update(struct multicall_entry *mcl, struct mmu_update *req,
		 int count, int *success_count, domid_t domid)
{
	mcl->op = __HYPERVISOR_mmu_update;
	mcl->args[0] = (unsigned long)req;
	mcl->args[1] = count;
	mcl->args[2] = (unsigned long)success_count;
	mcl->args[3] = domid;

	trace_xen_mc_entry(mcl, 4);
}

static inline void
MULTI_mmuext_op(struct multicall_entry *mcl, struct mmuext_op *op, int count,
		int *success_count, domid_t domid)
{
	mcl->op = __HYPERVISOR_mmuext_op;
	mcl->args[0] = (unsigned long)op;
	mcl->args[1] = count;
	mcl->args[2] = (unsigned long)success_count;
	mcl->args[3] = domid;

	trace_xen_mc_entry(mcl, 4);
}

static inline void
MULTI_set_gdt(struct multicall_entry *mcl, unsigned long *frames, int entries)
{
	mcl->op = __HYPERVISOR_set_gdt;
	mcl->args[0] = (unsigned long)frames;
	mcl->args[1] = entries;

	trace_xen_mc_entry(mcl, 2);
}

static inline void
MULTI_stack_switch(struct multicall_entry *mcl,
		   unsigned long ss, unsigned long esp)
{
	mcl->op = __HYPERVISOR_stack_switch;
	mcl->args[0] = ss;
	mcl->args[1] = esp;

	trace_xen_mc_entry(mcl, 2);
}

#endif /* _ASM_X86_XEN_HYPERCALL_H */
Commit	Line	Data
a42089dd JF	1	/******************************************************************************
	2	* hypercall.h
	3	*
	4	* Linux-specific hypervisor handling.
	5	*
	6	* Copyright (c) 2002-2004, K A Fraser
	7	*
	8	* This program is free software; you can redistribute it and/or
	9	* modify it under the terms of the GNU General Public License version 2
	10	* as published by the Free Software Foundation; or, when distributed
	11	* separately from the Linux kernel or incorporated into other
	12	* software packages, subject to the following license:
	13	*
	14	* Permission is hereby granted, free of charge, to any person obtaining a copy
	15	* of this source file (the "Software"), to deal in the Software without
	16	* restriction, including without limitation the rights to use, copy, modify,
	17	* merge, publish, distribute, sublicense, and/or sell copies of the Software,
	18	* and to permit persons to whom the Software is furnished to do so, subject to
	19	* the following conditions:
	20	*
	21	* The above copyright notice and this permission notice shall be included in
	22	* all copies or substantial portions of the Software.
	23	*
	24	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	25	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	26	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
	27	* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	28	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
	29	* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
	30	* IN THE SOFTWARE.
	31	*/
	32
05e4d316 PA	33	#ifndef _ASM_X86_XEN_HYPERCALL_H
05e4d316 PA	34	#define _ASM_X86_XEN_HYPERCALL_H
a42089dd	35
ecbf29cd JF	36	#include <linux/kernel.h>
ecbf29cd JF	37	#include <linux/spinlock.h>
a42089dd JF	38	#include <linux/errno.h>
a42089dd JF	39	#include <linux/string.h>
ecbf29cd JF	40	#include <linux/types.h>
ecbf29cd JF	41
c796f213 JF	42	#include <trace/events/xen.h>
c796f213 JF	43
ecbf29cd JF	44	#include <asm/page.h>
ecbf29cd JF	45	#include <asm/pgtable.h>
a42089dd JF	46
	47	#include <xen/interface/xen.h>
	48	#include <xen/interface/sched.h>
	49	#include <xen/interface/physdev.h>
eec07a9e	50	#include <xen/interface/platform.h>
cef12ee5	51	#include <xen/interface/xen-mca.h>
a42089dd	52
e7435902 JF	53	/*
	54	* The hypercall asms have to meet several constraints:
	55	* - Work on 32- and 64-bit.
	56	* The two architectures put their arguments in different sets of
	57	* registers.
	58	*
	59	* - Work around asm syntax quirks
	60	* It isn't possible to specify one of the rNN registers in a
	61	* constraint, so we use explicit register variables to get the
	62	* args into the right place.
	63	*
	64	* - Mark all registers as potentially clobbered
	65	* Even unused parameters can be clobbered by the hypervisor, so we
	66	* need to make sure gcc knows it.
	67	*
	68	* - Avoid compiler bugs.
	69	* This is the tricky part. Because x86_32 has such a constrained
	70	* register set, gcc versions below 4.3 have trouble generating
	71	* code when all the arg registers and memory are trashed by the
	72	* asm. There are syntactically simpler ways of achieving the
	73	* semantics below, but they cause the compiler to crash.
	74	*
	75	* The only combination I found which works is:
	76	* - assign the __argX variables first
	77	* - list all actually used parameters as "+r" (__argX)
	78	* - clobber the rest
	79	*
	80	* The result certainly isn't pretty, and it really shows up cpp's
	81	* weakness as as macro language. Sorry. (But let's just give thanks
	82	* there aren't more than 5 arguments...)
	83	*/
	84
a42089dd JF	85	extern struct { char _entry[32]; } hypercall_page[];
a42089dd JF	86
e7435902 JF	87	#define __HYPERCALL "call hypercall_page+%c[offset]"
	88	#define __HYPERCALL_ENTRY(x) \
	89	[offset] "i" (__HYPERVISOR_##x * sizeof(hypercall_page[0]))
	90
	91	#ifdef CONFIG_X86_32
	92	#define __HYPERCALL_RETREG "eax"
	93	#define __HYPERCALL_ARG1REG "ebx"
	94	#define __HYPERCALL_ARG2REG "ecx"
	95	#define __HYPERCALL_ARG3REG "edx"
	96	#define __HYPERCALL_ARG4REG "esi"
	97	#define __HYPERCALL_ARG5REG "edi"
	98	#else
	99	#define __HYPERCALL_RETREG "rax"
	100	#define __HYPERCALL_ARG1REG "rdi"
	101	#define __HYPERCALL_ARG2REG "rsi"
	102	#define __HYPERCALL_ARG3REG "rdx"
	103	#define __HYPERCALL_ARG4REG "r10"
	104	#define __HYPERCALL_ARG5REG "r8"
	105	#endif
	106
	107	#define __HYPERCALL_DECLS \
	108	register unsigned long __res asm(__HYPERCALL_RETREG); \
	109	register unsigned long __arg1 asm(__HYPERCALL_ARG1REG) = __arg1; \
	110	register unsigned long __arg2 asm(__HYPERCALL_ARG2REG) = __arg2; \
	111	register unsigned long __arg3 asm(__HYPERCALL_ARG3REG) = __arg3; \
	112	register unsigned long __arg4 asm(__HYPERCALL_ARG4REG) = __arg4; \
0e8e2238 JP	113	register unsigned long __arg5 asm(__HYPERCALL_ARG5REG) = __arg5; \
0e8e2238 JP	114	register void *__sp asm(_ASM_SP);
e7435902	115
0e8e2238	116	#define __HYPERCALL_0PARAM "=r" (__res), "+r" (__sp)
e7435902 JF	117	#define __HYPERCALL_1PARAM __HYPERCALL_0PARAM, "+r" (__arg1)
	118	#define __HYPERCALL_2PARAM __HYPERCALL_1PARAM, "+r" (__arg2)
	119	#define __HYPERCALL_3PARAM __HYPERCALL_2PARAM, "+r" (__arg3)
	120	#define __HYPERCALL_4PARAM __HYPERCALL_3PARAM, "+r" (__arg4)
	121	#define __HYPERCALL_5PARAM __HYPERCALL_4PARAM, "+r" (__arg5)
	122
	123	#define __HYPERCALL_0ARG()
	124	#define __HYPERCALL_1ARG(a1) \
	125	__HYPERCALL_0ARG() __arg1 = (unsigned long)(a1);
	126	#define __HYPERCALL_2ARG(a1,a2) \
	127	__HYPERCALL_1ARG(a1) __arg2 = (unsigned long)(a2);
	128	#define __HYPERCALL_3ARG(a1,a2,a3) \
	129	__HYPERCALL_2ARG(a1,a2) __arg3 = (unsigned long)(a3);
	130	#define __HYPERCALL_4ARG(a1,a2,a3,a4) \
	131	__HYPERCALL_3ARG(a1,a2,a3) __arg4 = (unsigned long)(a4);
	132	#define __HYPERCALL_5ARG(a1,a2,a3,a4,a5) \
	133	__HYPERCALL_4ARG(a1,a2,a3,a4) __arg5 = (unsigned long)(a5);
	134
	135	#define __HYPERCALL_CLOBBER5 "memory"
	136	#define __HYPERCALL_CLOBBER4 __HYPERCALL_CLOBBER5, __HYPERCALL_ARG5REG
	137	#define __HYPERCALL_CLOBBER3 __HYPERCALL_CLOBBER4, __HYPERCALL_ARG4REG
	138	#define __HYPERCALL_CLOBBER2 __HYPERCALL_CLOBBER3, __HYPERCALL_ARG3REG
	139	#define __HYPERCALL_CLOBBER1 __HYPERCALL_CLOBBER2, __HYPERCALL_ARG2REG
	140	#define __HYPERCALL_CLOBBER0 __HYPERCALL_CLOBBER1, __HYPERCALL_ARG1REG
	141
a42089dd JF	142	#define _hypercall0(type, name) \
a42089dd JF	143	({ \
e7435902 JF	144	__HYPERCALL_DECLS; \
	145	__HYPERCALL_0ARG(); \
	146	asm volatile (__HYPERCALL \
	147	: __HYPERCALL_0PARAM \
	148	: __HYPERCALL_ENTRY(name) \
	149	: __HYPERCALL_CLOBBER0); \
a42089dd JF	150	(type)__res; \
	151	})
	152
	153	#define _hypercall1(type, name, a1) \
	154	({ \
e7435902 JF	155	__HYPERCALL_DECLS; \
	156	__HYPERCALL_1ARG(a1); \
	157	asm volatile (__HYPERCALL \
	158	: __HYPERCALL_1PARAM \
	159	: __HYPERCALL_ENTRY(name) \
	160	: __HYPERCALL_CLOBBER1); \
a42089dd JF	161	(type)__res; \
	162	})
	163
	164	#define _hypercall2(type, name, a1, a2) \
	165	({ \
e7435902 JF	166	__HYPERCALL_DECLS; \
	167	__HYPERCALL_2ARG(a1, a2); \
	168	asm volatile (__HYPERCALL \
	169	: __HYPERCALL_2PARAM \
	170	: __HYPERCALL_ENTRY(name) \
	171	: __HYPERCALL_CLOBBER2); \
a42089dd JF	172	(type)__res; \
	173	})
	174
	175	#define _hypercall3(type, name, a1, a2, a3) \
	176	({ \
e7435902 JF	177	__HYPERCALL_DECLS; \
	178	__HYPERCALL_3ARG(a1, a2, a3); \
	179	asm volatile (__HYPERCALL \
	180	: __HYPERCALL_3PARAM \
	181	: __HYPERCALL_ENTRY(name) \
	182	: __HYPERCALL_CLOBBER3); \
a42089dd JF	183	(type)__res; \
	184	})
	185
	186	#define _hypercall4(type, name, a1, a2, a3, a4) \
	187	({ \
e7435902 JF	188	__HYPERCALL_DECLS; \
	189	__HYPERCALL_4ARG(a1, a2, a3, a4); \
	190	asm volatile (__HYPERCALL \
	191	: __HYPERCALL_4PARAM \
	192	: __HYPERCALL_ENTRY(name) \
	193	: __HYPERCALL_CLOBBER4); \
a42089dd JF	194	(type)__res; \
	195	})
	196
	197	#define _hypercall5(type, name, a1, a2, a3, a4, a5) \
	198	({ \
e7435902 JF	199	__HYPERCALL_DECLS; \
	200	__HYPERCALL_5ARG(a1, a2, a3, a4, a5); \
	201	asm volatile (__HYPERCALL \
	202	: __HYPERCALL_5PARAM \
	203	: __HYPERCALL_ENTRY(name) \
	204	: __HYPERCALL_CLOBBER5); \
a42089dd JF	205	(type)__res; \
	206	})
	207
1246ae0b JF	208	static inline long
	209	privcmd_call(unsigned call,
	210	unsigned long a1, unsigned long a2,
	211	unsigned long a3, unsigned long a4,
	212	unsigned long a5)
	213	{
	214	__HYPERCALL_DECLS;
	215	__HYPERCALL_5ARG(a1, a2, a3, a4, a5);
	216
	217	asm volatile("call *%[call]"
	218	: __HYPERCALL_5PARAM
	219	: [call] "a" (&hypercall_page[call])
	220	: __HYPERCALL_CLOBBER5);
	221
	222	return (long)__res;
	223	}
	224
a42089dd JF	225	static inline int
	226	HYPERVISOR_set_trap_table(struct trap_info *table)
	227	{
	228	return _hypercall1(int, set_trap_table, table);
	229	}
	230
	231	static inline int
	232	HYPERVISOR_mmu_update(struct mmu_update *req, int count,
	233	int *success_count, domid_t domid)
	234	{
	235	return _hypercall4(int, mmu_update, req, count, success_count, domid);
	236	}
	237
	238	static inline int
	239	HYPERVISOR_mmuext_op(struct mmuext_op *op, int count,
	240	int *success_count, domid_t domid)
	241	{
	242	return _hypercall4(int, mmuext_op, op, count, success_count, domid);
	243	}
	244
	245	static inline int
	246	HYPERVISOR_set_gdt(unsigned long *frame_list, int entries)
	247	{
	248	return _hypercall2(int, set_gdt, frame_list, entries);
	249	}
	250
	251	static inline int
	252	HYPERVISOR_stack_switch(unsigned long ss, unsigned long esp)
	253	{
	254	return _hypercall2(int, stack_switch, ss, esp);
	255	}
	256
88459d4c	257	#ifdef CONFIG_X86_32
a42089dd JF	258	static inline int
	259	HYPERVISOR_set_callbacks(unsigned long event_selector,
	260	unsigned long event_address,
	261	unsigned long failsafe_selector,
	262	unsigned long failsafe_address)
	263	{
	264	return _hypercall4(int, set_callbacks,
	265	event_selector, event_address,
	266	failsafe_selector, failsafe_address);
	267	}
88459d4c JF	268	#else /* CONFIG_X86_64 */
	269	static inline int
	270	HYPERVISOR_set_callbacks(unsigned long event_address,
	271	unsigned long failsafe_address,
	272	unsigned long syscall_address)
	273	{
	274	return _hypercall3(int, set_callbacks,
	275	event_address, failsafe_address,
	276	syscall_address);
	277	}
	278	#endif /* CONFIG_X86_{32,64} */
a42089dd	279
aa380c82 JF	280	static inline int
	281	HYPERVISOR_callback_op(int cmd, void *arg)
	282	{
	283	return _hypercall2(int, callback_op, cmd, arg);
	284	}
	285
a42089dd JF	286	static inline int
	287	HYPERVISOR_fpu_taskswitch(int set)
	288	{
	289	return _hypercall1(int, fpu_taskswitch, set);
	290	}
	291
	292	static inline int
349c709f	293	HYPERVISOR_sched_op(int cmd, void *arg)
a42089dd	294	{
a8b74583	295	return _hypercall2(int, sched_op, cmd, arg);
a42089dd JF	296	}
	297
	298	static inline long
	299	HYPERVISOR_set_timer_op(u64 timeout)
	300	{
	301	unsigned long timeout_hi = (unsigned long)(timeout>>32);
	302	unsigned long timeout_lo = (unsigned long)timeout;
	303	return _hypercall2(long, set_timer_op, timeout_lo, timeout_hi);
	304	}
	305
cef12ee5 LJ	306	static inline int
	307	HYPERVISOR_mca(struct xen_mc *mc_op)
	308	{
	309	mc_op->interface_version = XEN_MCA_INTERFACE_VERSION;
	310	return _hypercall1(int, mca, mc_op);
	311	}
	312
eec07a9e	313	static inline int
cfafae94	314	HYPERVISOR_platform_op(struct xen_platform_op *op)
eec07a9e	315	{
cfafae94 SS	316	op->interface_version = XENPF_INTERFACE_VERSION;
cfafae94 SS	317	return _hypercall1(int, platform_op, op);
eec07a9e JF	318	}
eec07a9e JF	319
a42089dd JF	320	static inline int
	321	HYPERVISOR_set_debugreg(int reg, unsigned long value)
	322	{
	323	return _hypercall2(int, set_debugreg, reg, value);
	324	}
	325
	326	static inline unsigned long
	327	HYPERVISOR_get_debugreg(int reg)
	328	{
	329	return _hypercall1(unsigned long, get_debugreg, reg);
	330	}
	331
	332	static inline int
	333	HYPERVISOR_update_descriptor(u64 ma, u64 desc)
	334	{
6a5c05f0 JB	335	if (sizeof(u64) == sizeof(long))
6a5c05f0 JB	336	return _hypercall2(int, update_descriptor, ma, desc);
a42089dd JF	337	return _hypercall4(int, update_descriptor, ma, ma>>32, desc, desc>>32);
	338	}
	339
24f775a6	340	static inline long
a42089dd JF	341	HYPERVISOR_memory_op(unsigned int cmd, void *arg)
a42089dd JF	342	{
24f775a6	343	return _hypercall2(long, memory_op, cmd, arg);
a42089dd JF	344	}
	345
	346	static inline int
5e40704e	347	HYPERVISOR_multicall(void *call_list, uint32_t nr_calls)
a42089dd JF	348	{
	349	return _hypercall2(int, multicall, call_list, nr_calls);
	350	}
	351
	352	static inline int
	353	HYPERVISOR_update_va_mapping(unsigned long va, pte_t new_val,
	354	unsigned long flags)
	355	{
ca15f20f JF	356	if (sizeof(new_val) == sizeof(long))
	357	return _hypercall3(int, update_va_mapping, va,
	358	new_val.pte, flags);
	359	else
	360	return _hypercall4(int, update_va_mapping, va,
	361	new_val.pte, new_val.pte >> 32, flags);
a42089dd	362	}
cf47a83f	363	extern int __must_check xen_event_channel_op_compat(int, void *);
a42089dd JF	364
	365	static inline int
	366	HYPERVISOR_event_channel_op(int cmd, void *arg)
	367	{
	368	int rc = _hypercall2(int, event_channel_op, cmd, arg);
cf47a83f JB	369	if (unlikely(rc == -ENOSYS))
cf47a83f JB	370	rc = xen_event_channel_op_compat(cmd, arg);
a42089dd JF	371	return rc;
	372	}
	373
	374	static inline int
	375	HYPERVISOR_xen_version(int cmd, void *arg)
	376	{
	377	return _hypercall2(int, xen_version, cmd, arg);
	378	}
	379
	380	static inline int
	381	HYPERVISOR_console_io(int cmd, int count, char *str)
	382	{
	383	return _hypercall3(int, console_io, cmd, count, str);
	384	}
	385
909b3fdb	386	extern int __must_check xen_physdev_op_compat(int, void *);
cf47a83f	387
a42089dd JF	388	static inline int
	389	HYPERVISOR_physdev_op(int cmd, void *arg)
	390	{
	391	int rc = _hypercall2(int, physdev_op, cmd, arg);
cf47a83f	392	if (unlikely(rc == -ENOSYS))
909b3fdb	393	rc = xen_physdev_op_compat(cmd, arg);
a42089dd JF	394	return rc;
	395	}
	396
	397	static inline int
	398	HYPERVISOR_grant_table_op(unsigned int cmd, void *uop, unsigned int count)
	399	{
	400	return _hypercall3(int, grant_table_op, cmd, uop, count);
	401	}
	402
	403	static inline int
	404	HYPERVISOR_update_va_mapping_otherdomain(unsigned long va, pte_t new_val,
	405	unsigned long flags, domid_t domid)
	406	{
ca15f20f JF	407	if (sizeof(new_val) == sizeof(long))
	408	return _hypercall4(int, update_va_mapping_otherdomain, va,
	409	new_val.pte, flags, domid);
	410	else
	411	return _hypercall5(int, update_va_mapping_otherdomain, va,
	412	new_val.pte, new_val.pte >> 32,
	413	flags, domid);
a42089dd JF	414	}
	415
	416	static inline int
	417	HYPERVISOR_vm_assist(unsigned int cmd, unsigned int type)
	418	{
	419	return _hypercall2(int, vm_assist, cmd, type);
	420	}
	421
	422	static inline int
	423	HYPERVISOR_vcpu_op(int cmd, int vcpuid, void *extra_args)
	424	{
	425	return _hypercall3(int, vcpu_op, cmd, vcpuid, extra_args);
	426	}
	427
45eb0d88 EH	428	#ifdef CONFIG_X86_64
	429	static inline int
	430	HYPERVISOR_set_segment_base(int reg, unsigned long value)
	431	{
	432	return _hypercall2(int, set_segment_base, reg, value);
	433	}
	434	#endif
	435
a42089dd	436	static inline int
8e15597f	437	HYPERVISOR_suspend(unsigned long start_info_mfn)
a42089dd	438	{
8e15597f IC	439	struct sched_shutdown r = { .reason = SHUTDOWN_suspend };
	440
	441	/*
	442	* For a PV guest the tools require that the start_info mfn be
	443	* present in rdx/edx when the hypercall is made. Per the
	444	* hypercall calling convention this is the third hypercall
	445	* argument, which is start_info_mfn here.
	446	*/
a8b74583	447	return _hypercall3(int, sched_op, SCHEDOP_shutdown, &r, start_info_mfn);
a42089dd JF	448	}
	449
	450	static inline int
	451	HYPERVISOR_nmi_op(unsigned long op, unsigned long arg)
	452	{
	453	return _hypercall2(int, nmi_op, op, arg);
	454	}
	455
18f19aa6 JF	456	static inline unsigned long __must_check
	457	HYPERVISOR_hvm_op(int op, void *arg)
	458	{
	459	return _hypercall2(unsigned long, hvm_op, op, arg);
	460	}
	461
5bc20fc5 DM	462	static inline int
	463	HYPERVISOR_tmem_op(
	464	struct tmem_op *op)
	465	{
	466	return _hypercall1(int, tmem_op, op);
	467	}
	468
5f141548 BO	469	static inline int
	470	HYPERVISOR_xenpmu_op(unsigned int op, void *arg)
	471	{
	472	return _hypercall2(int, xenpmu_op, op, arg);
	473	}
	474
ab520be8 PD	475	static inline int
	476	HYPERVISOR_dm_op(
	477	domid_t dom, unsigned int nr_bufs, void *bufs)
	478	{
	479	return _hypercall3(int, dm_op, dom, nr_bufs, bufs);
	480	}
	481
7b1333aa JF	482	static inline void
	483	MULTI_fpu_taskswitch(struct multicall_entry *mcl, int set)
	484	{
	485	mcl->op = __HYPERVISOR_fpu_taskswitch;
	486	mcl->args[0] = set;
c796f213 JF	487
c796f213 JF	488	trace_xen_mc_entry(mcl, 1);
7b1333aa JF	489	}
7b1333aa JF	490
a42089dd JF	491	static inline void
	492	MULTI_update_va_mapping(struct multicall_entry *mcl, unsigned long va,
	493	pte_t new_val, unsigned long flags)
	494	{
	495	mcl->op = __HYPERVISOR_update_va_mapping;
	496	mcl->args[0] = va;
ca15f20f JF	497	if (sizeof(new_val) == sizeof(long)) {
	498	mcl->args[1] = new_val.pte;
	499	mcl->args[2] = flags;
	500	} else {
	501	mcl->args[1] = new_val.pte;
	502	mcl->args[2] = new_val.pte >> 32;
	503	mcl->args[3] = flags;
	504	}
c796f213 JF	505
c796f213 JF	506	trace_xen_mc_entry(mcl, sizeof(new_val) == sizeof(long) ? 3 : 4);
a42089dd JF	507	}
	508
	509	static inline void
	510	MULTI_grant_table_op(struct multicall_entry *mcl, unsigned int cmd,
	511	void *uop, unsigned int count)
	512	{
	513	mcl->op = __HYPERVISOR_grant_table_op;
	514	mcl->args[0] = cmd;
	515	mcl->args[1] = (unsigned long)uop;
	516	mcl->args[2] = count;
c796f213 JF	517
c796f213 JF	518	trace_xen_mc_entry(mcl, 3);
a42089dd JF	519	}
	520
	521	static inline void
	522	MULTI_update_va_mapping_otherdomain(struct multicall_entry *mcl, unsigned long va,
	523	pte_t new_val, unsigned long flags,
	524	domid_t domid)
	525	{
	526	mcl->op = __HYPERVISOR_update_va_mapping_otherdomain;
	527	mcl->args[0] = va;
ca15f20f JF	528	if (sizeof(new_val) == sizeof(long)) {
	529	mcl->args[1] = new_val.pte;
	530	mcl->args[2] = flags;
	531	mcl->args[3] = domid;
	532	} else {
	533	mcl->args[1] = new_val.pte;
	534	mcl->args[2] = new_val.pte >> 32;
	535	mcl->args[3] = flags;
	536	mcl->args[4] = domid;
	537	}
c796f213 JF	538
c796f213 JF	539	trace_xen_mc_entry(mcl, sizeof(new_val) == sizeof(long) ? 4 : 5);
a42089dd JF	540	}
	541
	542	static inline void
	543	MULTI_update_descriptor(struct multicall_entry *mcl, u64 maddr,
	544	struct desc_struct desc)
	545	{
	546	mcl->op = __HYPERVISOR_update_descriptor;
c05f1cfa JF	547	if (sizeof(maddr) == sizeof(long)) {
	548	mcl->args[0] = maddr;
	549	mcl->args[1] = (unsigned long )&desc;
	550	} else {
	551	mcl->args[0] = maddr;
	552	mcl->args[1] = maddr >> 32;
	553	mcl->args[2] = desc.a;
	554	mcl->args[3] = desc.b;
	555	}
c796f213 JF	556
c796f213 JF	557	trace_xen_mc_entry(mcl, sizeof(maddr) == sizeof(long) ? 2 : 4);
a42089dd JF	558	}
	559
	560	static inline void
	561	MULTI_memory_op(struct multicall_entry mcl, unsigned int cmd, void arg)
	562	{
	563	mcl->op = __HYPERVISOR_memory_op;
	564	mcl->args[0] = cmd;
	565	mcl->args[1] = (unsigned long)arg;
c796f213 JF	566
c796f213 JF	567	trace_xen_mc_entry(mcl, 2);
a42089dd JF	568	}
	569
	570	static inline void
	571	MULTI_mmu_update(struct multicall_entry mcl, struct mmu_update req,
	572	int count, int *success_count, domid_t domid)
	573	{
	574	mcl->op = __HYPERVISOR_mmu_update;
	575	mcl->args[0] = (unsigned long)req;
	576	mcl->args[1] = count;
	577	mcl->args[2] = (unsigned long)success_count;
	578	mcl->args[3] = domid;
c796f213 JF	579
c796f213 JF	580	trace_xen_mc_entry(mcl, 4);
a42089dd JF	581	}
	582
	583	static inline void
	584	MULTI_mmuext_op(struct multicall_entry mcl, struct mmuext_op op, int count,
	585	int *success_count, domid_t domid)
	586	{
	587	mcl->op = __HYPERVISOR_mmuext_op;
	588	mcl->args[0] = (unsigned long)op;
	589	mcl->args[1] = count;
	590	mcl->args[2] = (unsigned long)success_count;
	591	mcl->args[3] = domid;
c796f213 JF	592
c796f213 JF	593	trace_xen_mc_entry(mcl, 4);
a42089dd	594	}
5ead97c8 JF	595
	596	static inline void
	597	MULTI_set_gdt(struct multicall_entry mcl, unsigned long frames, int entries)
	598	{
	599	mcl->op = __HYPERVISOR_set_gdt;
	600	mcl->args[0] = (unsigned long)frames;
	601	mcl->args[1] = entries;
c796f213 JF	602
c796f213 JF	603	trace_xen_mc_entry(mcl, 2);
5ead97c8 JF	604	}
	605
	606	static inline void
	607	MULTI_stack_switch(struct multicall_entry *mcl,
	608	unsigned long ss, unsigned long esp)
	609	{
	610	mcl->op = __HYPERVISOR_stack_switch;
	611	mcl->args[0] = ss;
	612	mcl->args[1] = esp;
c796f213 JF	613
c796f213 JF	614	trace_xen_mc_entry(mcl, 2);
5ead97c8 JF	615	}
5ead97c8 JF	616
05e4d316	617	#endif /* _ASM_X86_XEN_HYPERCALL_H */