[linux-block.git] / drivers / xen / efi.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * EFI support for Xen.
 *
 * Copyright (C) 1999 VA Linux Systems
 * Copyright (C) 1999 Walt Drummond <drummond@valinux.com>
 * Copyright (C) 1999-2002 Hewlett-Packard Co.
 *	David Mosberger-Tang <davidm@hpl.hp.com>
 *	Stephane Eranian <eranian@hpl.hp.com>
 * Copyright (C) 2005-2008 Intel Co.
 *	Fenghua Yu <fenghua.yu@intel.com>
 *	Bibo Mao <bibo.mao@intel.com>
 *	Chandramouli Narayanan <mouli@linux.intel.com>
 *	Huang Ying <ying.huang@intel.com>
 * Copyright (C) 2011 Novell Co.
 *	Jan Beulich <JBeulich@suse.com>
 * Copyright (C) 2011-2012 Oracle Co.
 *	Liang Tang <liang.tang@oracle.com>
 * Copyright (c) 2014 Oracle Co., Daniel Kiper
 */

#include <linux/bug.h>
#include <linux/efi.h>
#include <linux/init.h>
#include <linux/string.h>

#include <xen/interface/xen.h>
#include <xen/interface/platform.h>
#include <xen/xen.h>
#include <xen/xen-ops.h>

#include <asm/page.h>

#include <asm/xen/hypercall.h>

#define INIT_EFI_OP(name) \
	{.cmd = XENPF_efi_runtime_call, \
	 .u.efi_runtime_call.function = XEN_EFI_##name, \
	 .u.efi_runtime_call.misc = 0}

#define efi_data(op)	(op.u.efi_runtime_call)

efi_status_t xen_efi_get_time(efi_time_t *tm, efi_time_cap_t *tc)
{
	struct xen_platform_op op = INIT_EFI_OP(get_time);

	if (HYPERVISOR_platform_op(&op) < 0)
		return EFI_UNSUPPORTED;

	if (tm) {
		BUILD_BUG_ON(sizeof(*tm) != sizeof(efi_data(op).u.get_time.time));
		memcpy(tm, &efi_data(op).u.get_time.time, sizeof(*tm));
	}

	if (tc) {
		tc->resolution = efi_data(op).u.get_time.resolution;
		tc->accuracy = efi_data(op).u.get_time.accuracy;
		tc->sets_to_zero = !!(efi_data(op).misc &
				      XEN_EFI_GET_TIME_SET_CLEARS_NS);
	}

	return efi_data(op).status;
}
EXPORT_SYMBOL_GPL(xen_efi_get_time);

efi_status_t xen_efi_set_time(efi_time_t *tm)
{
	struct xen_platform_op op = INIT_EFI_OP(set_time);

	BUILD_BUG_ON(sizeof(*tm) != sizeof(efi_data(op).u.set_time));
	memcpy(&efi_data(op).u.set_time, tm, sizeof(*tm));

	if (HYPERVISOR_platform_op(&op) < 0)
		return EFI_UNSUPPORTED;

	return efi_data(op).status;
}
EXPORT_SYMBOL_GPL(xen_efi_set_time);

efi_status_t xen_efi_get_wakeup_time(efi_bool_t *enabled, efi_bool_t *pending,
				     efi_time_t *tm)
{
	struct xen_platform_op op = INIT_EFI_OP(get_wakeup_time);

	if (HYPERVISOR_platform_op(&op) < 0)
		return EFI_UNSUPPORTED;

	if (tm) {
		BUILD_BUG_ON(sizeof(*tm) != sizeof(efi_data(op).u.get_wakeup_time));
		memcpy(tm, &efi_data(op).u.get_wakeup_time, sizeof(*tm));
	}

	if (enabled)
		*enabled = !!(efi_data(op).misc & XEN_EFI_GET_WAKEUP_TIME_ENABLED);

	if (pending)
		*pending = !!(efi_data(op).misc & XEN_EFI_GET_WAKEUP_TIME_PENDING);

	return efi_data(op).status;
}
EXPORT_SYMBOL_GPL(xen_efi_get_wakeup_time);

efi_status_t xen_efi_set_wakeup_time(efi_bool_t enabled, efi_time_t *tm)
{
	struct xen_platform_op op = INIT_EFI_OP(set_wakeup_time);

	BUILD_BUG_ON(sizeof(*tm) != sizeof(efi_data(op).u.set_wakeup_time));
	if (enabled)
		efi_data(op).misc = XEN_EFI_SET_WAKEUP_TIME_ENABLE;
	if (tm)
		memcpy(&efi_data(op).u.set_wakeup_time, tm, sizeof(*tm));
	else
		efi_data(op).misc |= XEN_EFI_SET_WAKEUP_TIME_ENABLE_ONLY;

	if (HYPERVISOR_platform_op(&op) < 0)
		return EFI_UNSUPPORTED;

	return efi_data(op).status;
}
EXPORT_SYMBOL_GPL(xen_efi_set_wakeup_time);

efi_status_t xen_efi_get_variable(efi_char16_t *name, efi_guid_t *vendor,
				  u32 *attr, unsigned long *data_size,
				  void *data)
{
	struct xen_platform_op op = INIT_EFI_OP(get_variable);

	set_xen_guest_handle(efi_data(op).u.get_variable.name, name);
	BUILD_BUG_ON(sizeof(*vendor) !=
		     sizeof(efi_data(op).u.get_variable.vendor_guid));
	memcpy(&efi_data(op).u.get_variable.vendor_guid, vendor, sizeof(*vendor));
	efi_data(op).u.get_variable.size = *data_size;
	set_xen_guest_handle(efi_data(op).u.get_variable.data, data);

	if (HYPERVISOR_platform_op(&op) < 0)
		return EFI_UNSUPPORTED;

	*data_size = efi_data(op).u.get_variable.size;
	if (attr)
		*attr = efi_data(op).misc;

	return efi_data(op).status;
}
EXPORT_SYMBOL_GPL(xen_efi_get_variable);

efi_status_t xen_efi_get_next_variable(unsigned long *name_size,
				       efi_char16_t *name,
				       efi_guid_t *vendor)
{
	struct xen_platform_op op = INIT_EFI_OP(get_next_variable_name);

	efi_data(op).u.get_next_variable_name.size = *name_size;
	set_xen_guest_handle(efi_data(op).u.get_next_variable_name.name, name);
	BUILD_BUG_ON(sizeof(*vendor) !=
		     sizeof(efi_data(op).u.get_next_variable_name.vendor_guid));
	memcpy(&efi_data(op).u.get_next_variable_name.vendor_guid, vendor,
	       sizeof(*vendor));

	if (HYPERVISOR_platform_op(&op) < 0)
		return EFI_UNSUPPORTED;

	*name_size = efi_data(op).u.get_next_variable_name.size;
	memcpy(vendor, &efi_data(op).u.get_next_variable_name.vendor_guid,
	       sizeof(*vendor));

	return efi_data(op).status;
}
EXPORT_SYMBOL_GPL(xen_efi_get_next_variable);

efi_status_t xen_efi_set_variable(efi_char16_t *name, efi_guid_t *vendor,
				 u32 attr, unsigned long data_size,
				 void *data)
{
	struct xen_platform_op op = INIT_EFI_OP(set_variable);

	set_xen_guest_handle(efi_data(op).u.set_variable.name, name);
	efi_data(op).misc = attr;
	BUILD_BUG_ON(sizeof(*vendor) !=
		     sizeof(efi_data(op).u.set_variable.vendor_guid));
	memcpy(&efi_data(op).u.set_variable.vendor_guid, vendor, sizeof(*vendor));
	efi_data(op).u.set_variable.size = data_size;
	set_xen_guest_handle(efi_data(op).u.set_variable.data, data);

	if (HYPERVISOR_platform_op(&op) < 0)
		return EFI_UNSUPPORTED;

	return efi_data(op).status;
}
EXPORT_SYMBOL_GPL(xen_efi_set_variable);

efi_status_t xen_efi_query_variable_info(u32 attr, u64 *storage_space,
					 u64 *remaining_space,
					 u64 *max_variable_size)
{
	struct xen_platform_op op = INIT_EFI_OP(query_variable_info);

	if (efi.runtime_version < EFI_2_00_SYSTEM_TABLE_REVISION)
		return EFI_UNSUPPORTED;

	efi_data(op).u.query_variable_info.attr = attr;

	if (HYPERVISOR_platform_op(&op) < 0)
		return EFI_UNSUPPORTED;

	*storage_space = efi_data(op).u.query_variable_info.max_store_size;
	*remaining_space = efi_data(op).u.query_variable_info.remain_store_size;
	*max_variable_size = efi_data(op).u.query_variable_info.max_size;

	return efi_data(op).status;
}
EXPORT_SYMBOL_GPL(xen_efi_query_variable_info);

efi_status_t xen_efi_get_next_high_mono_count(u32 *count)
{
	struct xen_platform_op op = INIT_EFI_OP(get_next_high_monotonic_count);

	if (HYPERVISOR_platform_op(&op) < 0)
		return EFI_UNSUPPORTED;

	*count = efi_data(op).misc;

	return efi_data(op).status;
}
EXPORT_SYMBOL_GPL(xen_efi_get_next_high_mono_count);

efi_status_t xen_efi_update_capsule(efi_capsule_header_t **capsules,
				    unsigned long count, unsigned long sg_list)
{
	struct xen_platform_op op = INIT_EFI_OP(update_capsule);

	if (efi.runtime_version < EFI_2_00_SYSTEM_TABLE_REVISION)
		return EFI_UNSUPPORTED;

	set_xen_guest_handle(efi_data(op).u.update_capsule.capsule_header_array,
			     capsules);
	efi_data(op).u.update_capsule.capsule_count = count;
	efi_data(op).u.update_capsule.sg_list = sg_list;

	if (HYPERVISOR_platform_op(&op) < 0)
		return EFI_UNSUPPORTED;

	return efi_data(op).status;
}
EXPORT_SYMBOL_GPL(xen_efi_update_capsule);

efi_status_t xen_efi_query_capsule_caps(efi_capsule_header_t **capsules,
					unsigned long count, u64 *max_size,
					int *reset_type)
{
	struct xen_platform_op op = INIT_EFI_OP(query_capsule_capabilities);

	if (efi.runtime_version < EFI_2_00_SYSTEM_TABLE_REVISION)
		return EFI_UNSUPPORTED;

	set_xen_guest_handle(efi_data(op).u.query_capsule_capabilities.capsule_header_array,
					capsules);
	efi_data(op).u.query_capsule_capabilities.capsule_count = count;

	if (HYPERVISOR_platform_op(&op) < 0)
		return EFI_UNSUPPORTED;

	*max_size = efi_data(op).u.query_capsule_capabilities.max_capsule_size;
	*reset_type = efi_data(op).u.query_capsule_capabilities.reset_type;

	return efi_data(op).status;
}
EXPORT_SYMBOL_GPL(xen_efi_query_capsule_caps);

void xen_efi_reset_system(int reset_type, efi_status_t status,
			  unsigned long data_size, efi_char16_t *data)
{
	switch (reset_type) {
	case EFI_RESET_COLD:
	case EFI_RESET_WARM:
		xen_reboot(SHUTDOWN_reboot);
		break;
	case EFI_RESET_SHUTDOWN:
		xen_reboot(SHUTDOWN_poweroff);
		break;
	default:
		BUG();
	}
}
EXPORT_SYMBOL_GPL(xen_efi_reset_system);
Commit	Line	Data
457c8996	1	// SPDX-License-Identifier: GPL-2.0-only
be81c8a1 DK	2	/*
	3	* EFI support for Xen.
	4	*
	5	* Copyright (C) 1999 VA Linux Systems
	6	* Copyright (C) 1999 Walt Drummond <drummond@valinux.com>
	7	* Copyright (C) 1999-2002 Hewlett-Packard Co.
	8	* David Mosberger-Tang <davidm@hpl.hp.com>
	9	* Stephane Eranian <eranian@hpl.hp.com>
	10	* Copyright (C) 2005-2008 Intel Co.
	11	* Fenghua Yu <fenghua.yu@intel.com>
	12	* Bibo Mao <bibo.mao@intel.com>
	13	* Chandramouli Narayanan <mouli@linux.intel.com>
	14	* Huang Ying <ying.huang@intel.com>
	15	* Copyright (C) 2011 Novell Co.
	16	* Jan Beulich <JBeulich@suse.com>
	17	* Copyright (C) 2011-2012 Oracle Co.
	18	* Liang Tang <liang.tang@oracle.com>
	19	* Copyright (c) 2014 Oracle Co., Daniel Kiper
	20	*/
	21
	22	#include <linux/bug.h>
	23	#include <linux/efi.h>
	24	#include <linux/init.h>
	25	#include <linux/string.h>
	26
	27	#include <xen/interface/xen.h>
	28	#include <xen/interface/platform.h>
	29	#include <xen/xen.h>
e371fd76	30	#include <xen/xen-ops.h>
be81c8a1	31
342cd340 DK	32	#include <asm/page.h>
342cd340 DK	33
be81c8a1 DK	34	#include <asm/xen/hypercall.h>
	35
	36	#define INIT_EFI_OP(name) \
	37	{.cmd = XENPF_efi_runtime_call, \
	38	.u.efi_runtime_call.function = XEN_EFI_##name, \
	39	.u.efi_runtime_call.misc = 0}
	40
	41	#define efi_data(op) (op.u.efi_runtime_call)
	42
a62ed500	43	efi_status_t xen_efi_get_time(efi_time_t tm, efi_time_cap_t tc)
be81c8a1 DK	44	{
	45	struct xen_platform_op op = INIT_EFI_OP(get_time);
	46
cfafae94	47	if (HYPERVISOR_platform_op(&op) < 0)
be81c8a1 DK	48	return EFI_UNSUPPORTED;
	49
	50	if (tm) {
	51	BUILD_BUG_ON(sizeof(*tm) != sizeof(efi_data(op).u.get_time.time));
	52	memcpy(tm, &efi_data(op).u.get_time.time, sizeof(*tm));
	53	}
	54
	55	if (tc) {
	56	tc->resolution = efi_data(op).u.get_time.resolution;
	57	tc->accuracy = efi_data(op).u.get_time.accuracy;
	58	tc->sets_to_zero = !!(efi_data(op).misc &
	59	XEN_EFI_GET_TIME_SET_CLEARS_NS);
	60	}
	61
	62	return efi_data(op).status;
	63	}
a62ed500	64	EXPORT_SYMBOL_GPL(xen_efi_get_time);
be81c8a1	65
a62ed500	66	efi_status_t xen_efi_set_time(efi_time_t *tm)
be81c8a1 DK	67	{
	68	struct xen_platform_op op = INIT_EFI_OP(set_time);
	69
	70	BUILD_BUG_ON(sizeof(*tm) != sizeof(efi_data(op).u.set_time));
	71	memcpy(&efi_data(op).u.set_time, tm, sizeof(*tm));
	72
cfafae94	73	if (HYPERVISOR_platform_op(&op) < 0)
be81c8a1 DK	74	return EFI_UNSUPPORTED;
	75
	76	return efi_data(op).status;
	77	}
a62ed500	78	EXPORT_SYMBOL_GPL(xen_efi_set_time);
be81c8a1	79
a62ed500 SZ	80	efi_status_t xen_efi_get_wakeup_time(efi_bool_t enabled, efi_bool_t pending,
a62ed500 SZ	81	efi_time_t *tm)
be81c8a1 DK	82	{
	83	struct xen_platform_op op = INIT_EFI_OP(get_wakeup_time);
	84
cfafae94	85	if (HYPERVISOR_platform_op(&op) < 0)
be81c8a1 DK	86	return EFI_UNSUPPORTED;
	87
	88	if (tm) {
	89	BUILD_BUG_ON(sizeof(*tm) != sizeof(efi_data(op).u.get_wakeup_time));
	90	memcpy(tm, &efi_data(op).u.get_wakeup_time, sizeof(*tm));
	91	}
	92
	93	if (enabled)
	94	*enabled = !!(efi_data(op).misc & XEN_EFI_GET_WAKEUP_TIME_ENABLED);
	95
	96	if (pending)
	97	*pending = !!(efi_data(op).misc & XEN_EFI_GET_WAKEUP_TIME_PENDING);
	98
	99	return efi_data(op).status;
	100	}
a62ed500	101	EXPORT_SYMBOL_GPL(xen_efi_get_wakeup_time);
be81c8a1	102
a62ed500	103	efi_status_t xen_efi_set_wakeup_time(efi_bool_t enabled, efi_time_t *tm)
be81c8a1 DK	104	{
	105	struct xen_platform_op op = INIT_EFI_OP(set_wakeup_time);
	106
	107	BUILD_BUG_ON(sizeof(*tm) != sizeof(efi_data(op).u.set_wakeup_time));
	108	if (enabled)
	109	efi_data(op).misc = XEN_EFI_SET_WAKEUP_TIME_ENABLE;
	110	if (tm)
	111	memcpy(&efi_data(op).u.set_wakeup_time, tm, sizeof(*tm));
	112	else
	113	efi_data(op).misc \|= XEN_EFI_SET_WAKEUP_TIME_ENABLE_ONLY;
	114
cfafae94	115	if (HYPERVISOR_platform_op(&op) < 0)
be81c8a1 DK	116	return EFI_UNSUPPORTED;
	117
	118	return efi_data(op).status;
	119	}
a62ed500	120	EXPORT_SYMBOL_GPL(xen_efi_set_wakeup_time);
be81c8a1	121
a62ed500 SZ	122	efi_status_t xen_efi_get_variable(efi_char16_t name, efi_guid_t vendor,
	123	u32 attr, unsigned long data_size,
	124	void *data)
be81c8a1 DK	125	{
	126	struct xen_platform_op op = INIT_EFI_OP(get_variable);
	127
	128	set_xen_guest_handle(efi_data(op).u.get_variable.name, name);
	129	BUILD_BUG_ON(sizeof(*vendor) !=
	130	sizeof(efi_data(op).u.get_variable.vendor_guid));
	131	memcpy(&efi_data(op).u.get_variable.vendor_guid, vendor, sizeof(*vendor));
	132	efi_data(op).u.get_variable.size = *data_size;
	133	set_xen_guest_handle(efi_data(op).u.get_variable.data, data);
	134
cfafae94	135	if (HYPERVISOR_platform_op(&op) < 0)
be81c8a1 DK	136	return EFI_UNSUPPORTED;
	137
	138	*data_size = efi_data(op).u.get_variable.size;
	139	if (attr)
	140	*attr = efi_data(op).misc;
	141
	142	return efi_data(op).status;
	143	}
a62ed500	144	EXPORT_SYMBOL_GPL(xen_efi_get_variable);
be81c8a1	145
a62ed500 SZ	146	efi_status_t xen_efi_get_next_variable(unsigned long *name_size,
	147	efi_char16_t *name,
	148	efi_guid_t *vendor)
be81c8a1 DK	149	{
	150	struct xen_platform_op op = INIT_EFI_OP(get_next_variable_name);
	151
	152	efi_data(op).u.get_next_variable_name.size = *name_size;
	153	set_xen_guest_handle(efi_data(op).u.get_next_variable_name.name, name);
	154	BUILD_BUG_ON(sizeof(*vendor) !=
	155	sizeof(efi_data(op).u.get_next_variable_name.vendor_guid));
	156	memcpy(&efi_data(op).u.get_next_variable_name.vendor_guid, vendor,
	157	sizeof(*vendor));
	158
cfafae94	159	if (HYPERVISOR_platform_op(&op) < 0)
be81c8a1 DK	160	return EFI_UNSUPPORTED;
	161
	162	*name_size = efi_data(op).u.get_next_variable_name.size;
	163	memcpy(vendor, &efi_data(op).u.get_next_variable_name.vendor_guid,
	164	sizeof(*vendor));
	165
	166	return efi_data(op).status;
	167	}
a62ed500	168	EXPORT_SYMBOL_GPL(xen_efi_get_next_variable);
be81c8a1	169
a62ed500 SZ	170	efi_status_t xen_efi_set_variable(efi_char16_t name, efi_guid_t vendor,
	171	u32 attr, unsigned long data_size,
	172	void *data)
be81c8a1 DK	173	{
	174	struct xen_platform_op op = INIT_EFI_OP(set_variable);
	175
	176	set_xen_guest_handle(efi_data(op).u.set_variable.name, name);
	177	efi_data(op).misc = attr;
	178	BUILD_BUG_ON(sizeof(*vendor) !=
	179	sizeof(efi_data(op).u.set_variable.vendor_guid));
	180	memcpy(&efi_data(op).u.set_variable.vendor_guid, vendor, sizeof(*vendor));
	181	efi_data(op).u.set_variable.size = data_size;
	182	set_xen_guest_handle(efi_data(op).u.set_variable.data, data);
	183
cfafae94	184	if (HYPERVISOR_platform_op(&op) < 0)
be81c8a1 DK	185	return EFI_UNSUPPORTED;
	186
	187	return efi_data(op).status;
	188	}
a62ed500	189	EXPORT_SYMBOL_GPL(xen_efi_set_variable);
be81c8a1	190
a62ed500 SZ	191	efi_status_t xen_efi_query_variable_info(u32 attr, u64 *storage_space,
	192	u64 *remaining_space,
	193	u64 *max_variable_size)
be81c8a1 DK	194	{
	195	struct xen_platform_op op = INIT_EFI_OP(query_variable_info);
	196
	197	if (efi.runtime_version < EFI_2_00_SYSTEM_TABLE_REVISION)
	198	return EFI_UNSUPPORTED;
	199
	200	efi_data(op).u.query_variable_info.attr = attr;
	201
cfafae94	202	if (HYPERVISOR_platform_op(&op) < 0)
be81c8a1 DK	203	return EFI_UNSUPPORTED;
	204
	205	*storage_space = efi_data(op).u.query_variable_info.max_store_size;
	206	*remaining_space = efi_data(op).u.query_variable_info.remain_store_size;
	207	*max_variable_size = efi_data(op).u.query_variable_info.max_size;
	208
	209	return efi_data(op).status;
	210	}
a62ed500	211	EXPORT_SYMBOL_GPL(xen_efi_query_variable_info);
be81c8a1	212
a62ed500	213	efi_status_t xen_efi_get_next_high_mono_count(u32 *count)
be81c8a1 DK	214	{
	215	struct xen_platform_op op = INIT_EFI_OP(get_next_high_monotonic_count);
	216
cfafae94	217	if (HYPERVISOR_platform_op(&op) < 0)
be81c8a1 DK	218	return EFI_UNSUPPORTED;
	219
	220	*count = efi_data(op).misc;
	221
	222	return efi_data(op).status;
	223	}
a62ed500	224	EXPORT_SYMBOL_GPL(xen_efi_get_next_high_mono_count);
be81c8a1	225
a62ed500 SZ	226	efi_status_t xen_efi_update_capsule(efi_capsule_header_t **capsules,
a62ed500 SZ	227	unsigned long count, unsigned long sg_list)
be81c8a1 DK	228	{
	229	struct xen_platform_op op = INIT_EFI_OP(update_capsule);
	230
	231	if (efi.runtime_version < EFI_2_00_SYSTEM_TABLE_REVISION)
	232	return EFI_UNSUPPORTED;
	233
	234	set_xen_guest_handle(efi_data(op).u.update_capsule.capsule_header_array,
	235	capsules);
	236	efi_data(op).u.update_capsule.capsule_count = count;
	237	efi_data(op).u.update_capsule.sg_list = sg_list;
	238
cfafae94	239	if (HYPERVISOR_platform_op(&op) < 0)
be81c8a1 DK	240	return EFI_UNSUPPORTED;
	241
	242	return efi_data(op).status;
	243	}
a62ed500	244	EXPORT_SYMBOL_GPL(xen_efi_update_capsule);
be81c8a1	245
a62ed500 SZ	246	efi_status_t xen_efi_query_capsule_caps(efi_capsule_header_t **capsules,
	247	unsigned long count, u64 *max_size,
	248	int *reset_type)
be81c8a1 DK	249	{
	250	struct xen_platform_op op = INIT_EFI_OP(query_capsule_capabilities);
	251
	252	if (efi.runtime_version < EFI_2_00_SYSTEM_TABLE_REVISION)
	253	return EFI_UNSUPPORTED;
	254
	255	set_xen_guest_handle(efi_data(op).u.query_capsule_capabilities.capsule_header_array,
	256	capsules);
	257	efi_data(op).u.query_capsule_capabilities.capsule_count = count;
	258
cfafae94	259	if (HYPERVISOR_platform_op(&op) < 0)
be81c8a1 DK	260	return EFI_UNSUPPORTED;
	261
	262	*max_size = efi_data(op).u.query_capsule_capabilities.max_capsule_size;
	263	*reset_type = efi_data(op).u.query_capsule_capabilities.reset_type;
	264
	265	return efi_data(op).status;
	266	}
a62ed500	267	EXPORT_SYMBOL_GPL(xen_efi_query_capsule_caps);
e371fd76 JG	268
	269	void xen_efi_reset_system(int reset_type, efi_status_t status,
	270	unsigned long data_size, efi_char16_t *data)
	271	{
	272	switch (reset_type) {
	273	case EFI_RESET_COLD:
	274	case EFI_RESET_WARM:
	275	xen_reboot(SHUTDOWN_reboot);
	276	break;
	277	case EFI_RESET_SHUTDOWN:
	278	xen_reboot(SHUTDOWN_poweroff);
	279	break;
	280	default:
	281	BUG();
	282	}
	283	}
	284	EXPORT_SYMBOL_GPL(xen_efi_reset_system);