[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/errno.h>
#include <linux/string.h>

#include <xen/interface/xen.h>
#include <xen/interface/sched.h>
#include <xen/interface/physdev.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;

#define __HYPERCALL_0PARAM	"=r" (__res)
#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 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_new, 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)
{
	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);
}

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

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

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

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;
	}
}

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;
}

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;
	}
}

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;
	}
}

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;
}

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;
}

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;
}

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;
}

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;
}

#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
1965aae3 PA	33	#ifndef _ASM_X86_XEN__HYPERCALL_H
1965aae3 PA	34	#define _ASM_X86_XEN__HYPERCALL_H
a42089dd JF	35
	36	#include <linux/errno.h>
	37	#include <linux/string.h>
	38
	39	#include <xen/interface/xen.h>
	40	#include <xen/interface/sched.h>
	41	#include <xen/interface/physdev.h>
	42
e7435902 JF	43	/*
	44	* The hypercall asms have to meet several constraints:
	45	* - Work on 32- and 64-bit.
	46	* The two architectures put their arguments in different sets of
	47	* registers.
	48	*
	49	* - Work around asm syntax quirks
	50	* It isn't possible to specify one of the rNN registers in a
	51	* constraint, so we use explicit register variables to get the
	52	* args into the right place.
	53	*
	54	* - Mark all registers as potentially clobbered
	55	* Even unused parameters can be clobbered by the hypervisor, so we
	56	* need to make sure gcc knows it.
	57	*
	58	* - Avoid compiler bugs.
	59	* This is the tricky part. Because x86_32 has such a constrained
	60	* register set, gcc versions below 4.3 have trouble generating
	61	* code when all the arg registers and memory are trashed by the
	62	* asm. There are syntactically simpler ways of achieving the
	63	* semantics below, but they cause the compiler to crash.
	64	*
	65	* The only combination I found which works is:
	66	* - assign the __argX variables first
	67	* - list all actually used parameters as "+r" (__argX)
	68	* - clobber the rest
	69	*
	70	* The result certainly isn't pretty, and it really shows up cpp's
	71	* weakness as as macro language. Sorry. (But let's just give thanks
	72	* there aren't more than 5 arguments...)
	73	*/
	74
a42089dd JF	75	extern struct { char _entry[32]; } hypercall_page[];
a42089dd JF	76
e7435902 JF	77	#define __HYPERCALL "call hypercall_page+%c[offset]"
	78	#define __HYPERCALL_ENTRY(x) \
	79	[offset] "i" (__HYPERVISOR_##x * sizeof(hypercall_page[0]))
	80
	81	#ifdef CONFIG_X86_32
	82	#define __HYPERCALL_RETREG "eax"
	83	#define __HYPERCALL_ARG1REG "ebx"
	84	#define __HYPERCALL_ARG2REG "ecx"
	85	#define __HYPERCALL_ARG3REG "edx"
	86	#define __HYPERCALL_ARG4REG "esi"
	87	#define __HYPERCALL_ARG5REG "edi"
	88	#else
	89	#define __HYPERCALL_RETREG "rax"
	90	#define __HYPERCALL_ARG1REG "rdi"
	91	#define __HYPERCALL_ARG2REG "rsi"
	92	#define __HYPERCALL_ARG3REG "rdx"
	93	#define __HYPERCALL_ARG4REG "r10"
	94	#define __HYPERCALL_ARG5REG "r8"
	95	#endif
	96
	97	#define __HYPERCALL_DECLS \
	98	register unsigned long __res asm(__HYPERCALL_RETREG); \
	99	register unsigned long __arg1 asm(__HYPERCALL_ARG1REG) = __arg1; \
	100	register unsigned long __arg2 asm(__HYPERCALL_ARG2REG) = __arg2; \
	101	register unsigned long __arg3 asm(__HYPERCALL_ARG3REG) = __arg3; \
	102	register unsigned long __arg4 asm(__HYPERCALL_ARG4REG) = __arg4; \
	103	register unsigned long __arg5 asm(__HYPERCALL_ARG5REG) = __arg5;
	104
	105	#define __HYPERCALL_0PARAM "=r" (__res)
	106	#define __HYPERCALL_1PARAM __HYPERCALL_0PARAM, "+r" (__arg1)
	107	#define __HYPERCALL_2PARAM __HYPERCALL_1PARAM, "+r" (__arg2)
	108	#define __HYPERCALL_3PARAM __HYPERCALL_2PARAM, "+r" (__arg3)
	109	#define __HYPERCALL_4PARAM __HYPERCALL_3PARAM, "+r" (__arg4)
	110	#define __HYPERCALL_5PARAM __HYPERCALL_4PARAM, "+r" (__arg5)
	111
	112	#define __HYPERCALL_0ARG()
	113	#define __HYPERCALL_1ARG(a1) \
	114	__HYPERCALL_0ARG() __arg1 = (unsigned long)(a1);
	115	#define __HYPERCALL_2ARG(a1,a2) \
	116	__HYPERCALL_1ARG(a1) __arg2 = (unsigned long)(a2);
	117	#define __HYPERCALL_3ARG(a1,a2,a3) \
	118	__HYPERCALL_2ARG(a1,a2) __arg3 = (unsigned long)(a3);
	119	#define __HYPERCALL_4ARG(a1,a2,a3,a4) \
	120	__HYPERCALL_3ARG(a1,a2,a3) __arg4 = (unsigned long)(a4);
	121	#define __HYPERCALL_5ARG(a1,a2,a3,a4,a5) \
	122	__HYPERCALL_4ARG(a1,a2,a3,a4) __arg5 = (unsigned long)(a5);
	123
	124	#define __HYPERCALL_CLOBBER5 "memory"
	125	#define __HYPERCALL_CLOBBER4 __HYPERCALL_CLOBBER5, __HYPERCALL_ARG5REG
	126	#define __HYPERCALL_CLOBBER3 __HYPERCALL_CLOBBER4, __HYPERCALL_ARG4REG
	127	#define __HYPERCALL_CLOBBER2 __HYPERCALL_CLOBBER3, __HYPERCALL_ARG3REG
	128	#define __HYPERCALL_CLOBBER1 __HYPERCALL_CLOBBER2, __HYPERCALL_ARG2REG
	129	#define __HYPERCALL_CLOBBER0 __HYPERCALL_CLOBBER1, __HYPERCALL_ARG1REG
	130
a42089dd JF	131	#define _hypercall0(type, name) \
a42089dd JF	132	({ \
e7435902 JF	133	__HYPERCALL_DECLS; \
	134	__HYPERCALL_0ARG(); \
	135	asm volatile (__HYPERCALL \
	136	: __HYPERCALL_0PARAM \
	137	: __HYPERCALL_ENTRY(name) \
	138	: __HYPERCALL_CLOBBER0); \
a42089dd JF	139	(type)__res; \
	140	})
	141
	142	#define _hypercall1(type, name, a1) \
	143	({ \
e7435902 JF	144	__HYPERCALL_DECLS; \
	145	__HYPERCALL_1ARG(a1); \
	146	asm volatile (__HYPERCALL \
	147	: __HYPERCALL_1PARAM \
	148	: __HYPERCALL_ENTRY(name) \
	149	: __HYPERCALL_CLOBBER1); \
a42089dd JF	150	(type)__res; \
	151	})
	152
	153	#define _hypercall2(type, name, a1, a2) \
	154	({ \
e7435902 JF	155	__HYPERCALL_DECLS; \
	156	__HYPERCALL_2ARG(a1, a2); \
	157	asm volatile (__HYPERCALL \
	158	: __HYPERCALL_2PARAM \
	159	: __HYPERCALL_ENTRY(name) \
	160	: __HYPERCALL_CLOBBER2); \
a42089dd JF	161	(type)__res; \
	162	})
	163
	164	#define _hypercall3(type, name, a1, a2, a3) \
	165	({ \
e7435902 JF	166	__HYPERCALL_DECLS; \
	167	__HYPERCALL_3ARG(a1, a2, a3); \
	168	asm volatile (__HYPERCALL \
	169	: __HYPERCALL_3PARAM \
	170	: __HYPERCALL_ENTRY(name) \
	171	: __HYPERCALL_CLOBBER3); \
a42089dd JF	172	(type)__res; \
	173	})
	174
	175	#define _hypercall4(type, name, a1, a2, a3, a4) \
	176	({ \
e7435902 JF	177	__HYPERCALL_DECLS; \
	178	__HYPERCALL_4ARG(a1, a2, a3, a4); \
	179	asm volatile (__HYPERCALL \
	180	: __HYPERCALL_4PARAM \
	181	: __HYPERCALL_ENTRY(name) \
	182	: __HYPERCALL_CLOBBER4); \
a42089dd JF	183	(type)__res; \
	184	})
	185
	186	#define _hypercall5(type, name, a1, a2, a3, a4, a5) \
	187	({ \
e7435902 JF	188	__HYPERCALL_DECLS; \
	189	__HYPERCALL_5ARG(a1, a2, a3, a4, a5); \
	190	asm volatile (__HYPERCALL \
	191	: __HYPERCALL_5PARAM \
	192	: __HYPERCALL_ENTRY(name) \
	193	: __HYPERCALL_CLOBBER5); \
a42089dd JF	194	(type)__res; \
	195	})
	196
	197	static inline int
	198	HYPERVISOR_set_trap_table(struct trap_info *table)
	199	{
	200	return _hypercall1(int, set_trap_table, table);
	201	}
	202
	203	static inline int
	204	HYPERVISOR_mmu_update(struct mmu_update *req, int count,
	205	int *success_count, domid_t domid)
	206	{
	207	return _hypercall4(int, mmu_update, req, count, success_count, domid);
	208	}
	209
	210	static inline int
	211	HYPERVISOR_mmuext_op(struct mmuext_op *op, int count,
	212	int *success_count, domid_t domid)
	213	{
	214	return _hypercall4(int, mmuext_op, op, count, success_count, domid);
	215	}
	216
	217	static inline int
	218	HYPERVISOR_set_gdt(unsigned long *frame_list, int entries)
	219	{
	220	return _hypercall2(int, set_gdt, frame_list, entries);
	221	}
	222
	223	static inline int
	224	HYPERVISOR_stack_switch(unsigned long ss, unsigned long esp)
	225	{
	226	return _hypercall2(int, stack_switch, ss, esp);
	227	}
	228
88459d4c	229	#ifdef CONFIG_X86_32
a42089dd JF	230	static inline int
	231	HYPERVISOR_set_callbacks(unsigned long event_selector,
	232	unsigned long event_address,
	233	unsigned long failsafe_selector,
	234	unsigned long failsafe_address)
	235	{
	236	return _hypercall4(int, set_callbacks,
	237	event_selector, event_address,
	238	failsafe_selector, failsafe_address);
	239	}
88459d4c JF	240	#else /* CONFIG_X86_64 */
	241	static inline int
	242	HYPERVISOR_set_callbacks(unsigned long event_address,
	243	unsigned long failsafe_address,
	244	unsigned long syscall_address)
	245	{
	246	return _hypercall3(int, set_callbacks,
	247	event_address, failsafe_address,
	248	syscall_address);
	249	}
	250	#endif /* CONFIG_X86_{32,64} */
a42089dd	251
aa380c82 JF	252	static inline int
	253	HYPERVISOR_callback_op(int cmd, void *arg)
	254	{
	255	return _hypercall2(int, callback_op, cmd, arg);
	256	}
	257
a42089dd JF	258	static inline int
	259	HYPERVISOR_fpu_taskswitch(int set)
	260	{
	261	return _hypercall1(int, fpu_taskswitch, set);
	262	}
	263
	264	static inline int
349c709f	265	HYPERVISOR_sched_op(int cmd, void *arg)
a42089dd	266	{
349c709f	267	return _hypercall2(int, sched_op_new, cmd, arg);
a42089dd JF	268	}
	269
	270	static inline long
	271	HYPERVISOR_set_timer_op(u64 timeout)
	272	{
	273	unsigned long timeout_hi = (unsigned long)(timeout>>32);
	274	unsigned long timeout_lo = (unsigned long)timeout;
	275	return _hypercall2(long, set_timer_op, timeout_lo, timeout_hi);
	276	}
	277
	278	static inline int
	279	HYPERVISOR_set_debugreg(int reg, unsigned long value)
	280	{
	281	return _hypercall2(int, set_debugreg, reg, value);
	282	}
	283
	284	static inline unsigned long
	285	HYPERVISOR_get_debugreg(int reg)
	286	{
	287	return _hypercall1(unsigned long, get_debugreg, reg);
	288	}
	289
	290	static inline int
	291	HYPERVISOR_update_descriptor(u64 ma, u64 desc)
	292	{
	293	return _hypercall4(int, update_descriptor, ma, ma>>32, desc, desc>>32);
	294	}
	295
	296	static inline int
	297	HYPERVISOR_memory_op(unsigned int cmd, void *arg)
	298	{
	299	return _hypercall2(int, memory_op, cmd, arg);
	300	}
	301
	302	static inline int
	303	HYPERVISOR_multicall(void *call_list, int nr_calls)
	304	{
	305	return _hypercall2(int, multicall, call_list, nr_calls);
	306	}
	307
	308	static inline int
	309	HYPERVISOR_update_va_mapping(unsigned long va, pte_t new_val,
	310	unsigned long flags)
	311	{
ca15f20f JF	312	if (sizeof(new_val) == sizeof(long))
	313	return _hypercall3(int, update_va_mapping, va,
	314	new_val.pte, flags);
	315	else
	316	return _hypercall4(int, update_va_mapping, va,
	317	new_val.pte, new_val.pte >> 32, flags);
a42089dd JF	318	}
	319
	320	static inline int
	321	HYPERVISOR_event_channel_op(int cmd, void *arg)
	322	{
	323	int rc = _hypercall2(int, event_channel_op, cmd, arg);
	324	if (unlikely(rc == -ENOSYS)) {
	325	struct evtchn_op op;
	326	op.cmd = cmd;
	327	memcpy(&op.u, arg, sizeof(op.u));
	328	rc = _hypercall1(int, event_channel_op_compat, &op);
	329	memcpy(arg, &op.u, sizeof(op.u));
	330	}
	331	return rc;
	332	}
	333
	334	static inline int
	335	HYPERVISOR_xen_version(int cmd, void *arg)
	336	{
	337	return _hypercall2(int, xen_version, cmd, arg);
	338	}
	339
	340	static inline int
	341	HYPERVISOR_console_io(int cmd, int count, char *str)
	342	{
	343	return _hypercall3(int, console_io, cmd, count, str);
	344	}
	345
	346	static inline int
	347	HYPERVISOR_physdev_op(int cmd, void *arg)
	348	{
	349	int rc = _hypercall2(int, physdev_op, cmd, arg);
	350	if (unlikely(rc == -ENOSYS)) {
	351	struct physdev_op op;
	352	op.cmd = cmd;
	353	memcpy(&op.u, arg, sizeof(op.u));
	354	rc = _hypercall1(int, physdev_op_compat, &op);
	355	memcpy(arg, &op.u, sizeof(op.u));
	356	}
	357	return rc;
	358	}
	359
	360	static inline int
	361	HYPERVISOR_grant_table_op(unsigned int cmd, void *uop, unsigned int count)
	362	{
	363	return _hypercall3(int, grant_table_op, cmd, uop, count);
	364	}
	365
	366	static inline int
	367	HYPERVISOR_update_va_mapping_otherdomain(unsigned long va, pte_t new_val,
	368	unsigned long flags, domid_t domid)
	369	{
ca15f20f JF	370	if (sizeof(new_val) == sizeof(long))
	371	return _hypercall4(int, update_va_mapping_otherdomain, va,
	372	new_val.pte, flags, domid);
	373	else
	374	return _hypercall5(int, update_va_mapping_otherdomain, va,
	375	new_val.pte, new_val.pte >> 32,
	376	flags, domid);
a42089dd JF	377	}
	378
	379	static inline int
	380	HYPERVISOR_vm_assist(unsigned int cmd, unsigned int type)
	381	{
	382	return _hypercall2(int, vm_assist, cmd, type);
	383	}
	384
	385	static inline int
	386	HYPERVISOR_vcpu_op(int cmd, int vcpuid, void *extra_args)
	387	{
	388	return _hypercall3(int, vcpu_op, cmd, vcpuid, extra_args);
	389	}
	390
45eb0d88 EH	391	#ifdef CONFIG_X86_64
	392	static inline int
	393	HYPERVISOR_set_segment_base(int reg, unsigned long value)
	394	{
	395	return _hypercall2(int, set_segment_base, reg, value);
	396	}
	397	#endif
	398
a42089dd JF	399	static inline int
	400	HYPERVISOR_suspend(unsigned long srec)
	401	{
	402	return _hypercall3(int, sched_op, SCHEDOP_shutdown,
	403	SHUTDOWN_suspend, srec);
	404	}
	405
	406	static inline int
	407	HYPERVISOR_nmi_op(unsigned long op, unsigned long arg)
	408	{
	409	return _hypercall2(int, nmi_op, op, arg);
	410	}
	411
7b1333aa JF	412	static inline void
	413	MULTI_fpu_taskswitch(struct multicall_entry *mcl, int set)
	414	{
	415	mcl->op = __HYPERVISOR_fpu_taskswitch;
	416	mcl->args[0] = set;
	417	}
	418
a42089dd JF	419	static inline void
	420	MULTI_update_va_mapping(struct multicall_entry *mcl, unsigned long va,
	421	pte_t new_val, unsigned long flags)
	422	{
	423	mcl->op = __HYPERVISOR_update_va_mapping;
	424	mcl->args[0] = va;
ca15f20f JF	425	if (sizeof(new_val) == sizeof(long)) {
	426	mcl->args[1] = new_val.pte;
	427	mcl->args[2] = flags;
	428	} else {
	429	mcl->args[1] = new_val.pte;
	430	mcl->args[2] = new_val.pte >> 32;
	431	mcl->args[3] = flags;
	432	}
a42089dd JF	433	}
	434
	435	static inline void
	436	MULTI_grant_table_op(struct multicall_entry *mcl, unsigned int cmd,
	437	void *uop, unsigned int count)
	438	{
	439	mcl->op = __HYPERVISOR_grant_table_op;
	440	mcl->args[0] = cmd;
	441	mcl->args[1] = (unsigned long)uop;
	442	mcl->args[2] = count;
	443	}
	444
	445	static inline void
	446	MULTI_update_va_mapping_otherdomain(struct multicall_entry *mcl, unsigned long va,
	447	pte_t new_val, unsigned long flags,
	448	domid_t domid)
	449	{
	450	mcl->op = __HYPERVISOR_update_va_mapping_otherdomain;
	451	mcl->args[0] = va;
ca15f20f JF	452	if (sizeof(new_val) == sizeof(long)) {
	453	mcl->args[1] = new_val.pte;
	454	mcl->args[2] = flags;
	455	mcl->args[3] = domid;
	456	} else {
	457	mcl->args[1] = new_val.pte;
	458	mcl->args[2] = new_val.pte >> 32;
	459	mcl->args[3] = flags;
	460	mcl->args[4] = domid;
	461	}
a42089dd JF	462	}
	463
	464	static inline void
	465	MULTI_update_descriptor(struct multicall_entry *mcl, u64 maddr,
	466	struct desc_struct desc)
	467	{
	468	mcl->op = __HYPERVISOR_update_descriptor;
c05f1cfa JF	469	if (sizeof(maddr) == sizeof(long)) {
	470	mcl->args[0] = maddr;
	471	mcl->args[1] = (unsigned long )&desc;
	472	} else {
	473	mcl->args[0] = maddr;
	474	mcl->args[1] = maddr >> 32;
	475	mcl->args[2] = desc.a;
	476	mcl->args[3] = desc.b;
	477	}
a42089dd JF	478	}
	479
	480	static inline void
	481	MULTI_memory_op(struct multicall_entry mcl, unsigned int cmd, void arg)
	482	{
	483	mcl->op = __HYPERVISOR_memory_op;
	484	mcl->args[0] = cmd;
	485	mcl->args[1] = (unsigned long)arg;
	486	}
	487
	488	static inline void
	489	MULTI_mmu_update(struct multicall_entry mcl, struct mmu_update req,
	490	int count, int *success_count, domid_t domid)
	491	{
	492	mcl->op = __HYPERVISOR_mmu_update;
	493	mcl->args[0] = (unsigned long)req;
	494	mcl->args[1] = count;
	495	mcl->args[2] = (unsigned long)success_count;
	496	mcl->args[3] = domid;
	497	}
	498
	499	static inline void
	500	MULTI_mmuext_op(struct multicall_entry mcl, struct mmuext_op op, int count,
	501	int *success_count, domid_t domid)
	502	{
	503	mcl->op = __HYPERVISOR_mmuext_op;
	504	mcl->args[0] = (unsigned long)op;
	505	mcl->args[1] = count;
	506	mcl->args[2] = (unsigned long)success_count;
	507	mcl->args[3] = domid;
	508	}
5ead97c8 JF	509
	510	static inline void
	511	MULTI_set_gdt(struct multicall_entry mcl, unsigned long frames, int entries)
	512	{
	513	mcl->op = __HYPERVISOR_set_gdt;
	514	mcl->args[0] = (unsigned long)frames;
	515	mcl->args[1] = entries;
	516	}
	517
	518	static inline void
	519	MULTI_stack_switch(struct multicall_entry *mcl,
	520	unsigned long ss, unsigned long esp)
	521	{
	522	mcl->op = __HYPERVISOR_stack_switch;
	523	mcl->args[0] = ss;
	524	mcl->args[1] = esp;
	525	}
	526
1965aae3	527	#endif /* _ASM_X86_XEN__HYPERCALL_H */