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v4.10.11
  1/*
  2 * Copyright (c) 2014 Oracle Co., Daniel Kiper
  3 *
  4 * This program is free software; you can redistribute it and/or modify
  5 * it under the terms of the GNU General Public License as published by
  6 * the Free Software Foundation; either version 2 of the License, or
  7 * (at your option) any later version.
  8 *
  9 * This program is distributed in the hope that it will be useful,
 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 12 * GNU General Public License for more details.
 13 *
 14 * You should have received a copy of the GNU General Public License along
 15 * with this program.  If not, see <http://www.gnu.org/licenses/>.
 16 */
 17
 18#include <linux/bitops.h>
 19#include <linux/efi.h>
 20#include <linux/init.h>
 21#include <linux/string.h>
 22
 23#include <xen/xen.h>
 24#include <xen/xen-ops.h>
 25#include <xen/interface/platform.h>
 26
 27#include <asm/page.h>
 28#include <asm/setup.h>
 29#include <asm/xen/hypercall.h>
 30
 31static efi_char16_t vendor[100] __initdata;
 32
 33static efi_system_table_t efi_systab_xen __initdata = {
 34	.hdr = {
 35		.signature	= EFI_SYSTEM_TABLE_SIGNATURE,
 36		.revision	= 0, /* Initialized later. */
 37		.headersize	= 0, /* Ignored by Linux Kernel. */
 38		.crc32		= 0, /* Ignored by Linux Kernel. */
 39		.reserved	= 0
 40	},
 41	.fw_vendor	= EFI_INVALID_TABLE_ADDR, /* Initialized later. */
 42	.fw_revision	= 0,			  /* Initialized later. */
 43	.con_in_handle	= EFI_INVALID_TABLE_ADDR, /* Not used under Xen. */
 44	.con_in		= EFI_INVALID_TABLE_ADDR, /* Not used under Xen. */
 45	.con_out_handle	= EFI_INVALID_TABLE_ADDR, /* Not used under Xen. */
 46	.con_out	= EFI_INVALID_TABLE_ADDR, /* Not used under Xen. */
 47	.stderr_handle	= EFI_INVALID_TABLE_ADDR, /* Not used under Xen. */
 48	.stderr		= EFI_INVALID_TABLE_ADDR, /* Not used under Xen. */
 49	.runtime	= (efi_runtime_services_t *)EFI_INVALID_TABLE_ADDR,
 50						  /* Not used under Xen. */
 51	.boottime	= (efi_boot_services_t *)EFI_INVALID_TABLE_ADDR,
 52						  /* Not used under Xen. */
 53	.nr_tables	= 0,			  /* Initialized later. */
 54	.tables		= EFI_INVALID_TABLE_ADDR  /* Initialized later. */
 55};
 56
 57static const struct efi efi_xen __initconst = {
 58	.systab                   = NULL, /* Initialized later. */
 59	.runtime_version	  = 0,    /* Initialized later. */
 60	.mps                      = EFI_INVALID_TABLE_ADDR,
 61	.acpi                     = EFI_INVALID_TABLE_ADDR,
 62	.acpi20                   = EFI_INVALID_TABLE_ADDR,
 63	.smbios                   = EFI_INVALID_TABLE_ADDR,
 64	.smbios3                  = EFI_INVALID_TABLE_ADDR,
 65	.sal_systab               = EFI_INVALID_TABLE_ADDR,
 66	.boot_info                = EFI_INVALID_TABLE_ADDR,
 67	.hcdp                     = EFI_INVALID_TABLE_ADDR,
 68	.uga                      = EFI_INVALID_TABLE_ADDR,
 69	.uv_systab                = EFI_INVALID_TABLE_ADDR,
 70	.fw_vendor                = EFI_INVALID_TABLE_ADDR,
 71	.runtime                  = EFI_INVALID_TABLE_ADDR,
 72	.config_table             = EFI_INVALID_TABLE_ADDR,
 73	.get_time                 = xen_efi_get_time,
 74	.set_time                 = xen_efi_set_time,
 75	.get_wakeup_time          = xen_efi_get_wakeup_time,
 76	.set_wakeup_time          = xen_efi_set_wakeup_time,
 77	.get_variable             = xen_efi_get_variable,
 78	.get_next_variable        = xen_efi_get_next_variable,
 79	.set_variable             = xen_efi_set_variable,
 80	.query_variable_info      = xen_efi_query_variable_info,
 81	.update_capsule           = xen_efi_update_capsule,
 82	.query_capsule_caps       = xen_efi_query_capsule_caps,
 83	.get_next_high_mono_count = xen_efi_get_next_high_mono_count,
 84	.reset_system             = NULL, /* Functionality provided by Xen. */
 85	.set_virtual_address_map  = NULL, /* Not used under Xen. */
 86	.flags			  = 0     /* Initialized later. */
 87};
 88
 89static efi_system_table_t __init *xen_efi_probe(void)
 90{
 91	struct xen_platform_op op = {
 92		.cmd = XENPF_firmware_info,
 93		.u.firmware_info = {
 94			.type = XEN_FW_EFI_INFO,
 95			.index = XEN_FW_EFI_CONFIG_TABLE
 96		}
 97	};
 98	union xenpf_efi_info *info = &op.u.firmware_info.u.efi_info;
 99
100	if (!xen_initial_domain() || HYPERVISOR_platform_op(&op) < 0)
101		return NULL;
102
103	/* Here we know that Xen runs on EFI platform. */
104
105	efi = efi_xen;
106
107	efi_systab_xen.tables = info->cfg.addr;
108	efi_systab_xen.nr_tables = info->cfg.nent;
109
110	op.cmd = XENPF_firmware_info;
111	op.u.firmware_info.type = XEN_FW_EFI_INFO;
112	op.u.firmware_info.index = XEN_FW_EFI_VENDOR;
113	info->vendor.bufsz = sizeof(vendor);
114	set_xen_guest_handle(info->vendor.name, vendor);
115
116	if (HYPERVISOR_platform_op(&op) == 0) {
117		efi_systab_xen.fw_vendor = __pa_symbol(vendor);
118		efi_systab_xen.fw_revision = info->vendor.revision;
119	} else
120		efi_systab_xen.fw_vendor = __pa_symbol(L"UNKNOWN");
121
122	op.cmd = XENPF_firmware_info;
123	op.u.firmware_info.type = XEN_FW_EFI_INFO;
124	op.u.firmware_info.index = XEN_FW_EFI_VERSION;
125
126	if (HYPERVISOR_platform_op(&op) == 0)
127		efi_systab_xen.hdr.revision = info->version;
128
129	op.cmd = XENPF_firmware_info;
130	op.u.firmware_info.type = XEN_FW_EFI_INFO;
131	op.u.firmware_info.index = XEN_FW_EFI_RT_VERSION;
132
133	if (HYPERVISOR_platform_op(&op) == 0)
134		efi.runtime_version = info->version;
135
136	return &efi_systab_xen;
137}
138
139void __init xen_efi_init(void)
140{
141	efi_system_table_t *efi_systab_xen;
142
143	efi_systab_xen = xen_efi_probe();
144
145	if (efi_systab_xen == NULL)
146		return;
147
148	strncpy((char *)&boot_params.efi_info.efi_loader_signature, "Xen",
149			sizeof(boot_params.efi_info.efi_loader_signature));
150	boot_params.efi_info.efi_systab = (__u32)__pa(efi_systab_xen);
151	boot_params.efi_info.efi_systab_hi = (__u32)(__pa(efi_systab_xen) >> 32);
152
153	set_bit(EFI_BOOT, &efi.flags);
154	set_bit(EFI_PARAVIRT, &efi.flags);
155	set_bit(EFI_64BIT, &efi.flags);
156}
v4.6
 1/*
 2 * Copyright (c) 2014 Oracle Co., Daniel Kiper
 3 *
 4 * This program is free software; you can redistribute it and/or modify
 5 * it under the terms of the GNU General Public License as published by
 6 * the Free Software Foundation; either version 2 of the License, or
 7 * (at your option) any later version.
 8 *
 9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License along
15 * with this program.  If not, see <http://www.gnu.org/licenses/>.
16 */
17
18#include <linux/bitops.h>
19#include <linux/efi.h>
20#include <linux/init.h>
21#include <linux/string.h>
22
 
23#include <xen/xen-ops.h>
 
24
25#include <asm/page.h>
26#include <asm/setup.h>
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
27
28void __init xen_efi_init(void)
29{
30	efi_system_table_t *efi_systab_xen;
31
32	efi_systab_xen = xen_efi_probe();
33
34	if (efi_systab_xen == NULL)
35		return;
36
37	strncpy((char *)&boot_params.efi_info.efi_loader_signature, "Xen",
38			sizeof(boot_params.efi_info.efi_loader_signature));
39	boot_params.efi_info.efi_systab = (__u32)__pa(efi_systab_xen);
40	boot_params.efi_info.efi_systab_hi = (__u32)(__pa(efi_systab_xen) >> 32);
41
42	set_bit(EFI_BOOT, &efi.flags);
43	set_bit(EFI_PARAVIRT, &efi.flags);
44	set_bit(EFI_64BIT, &efi.flags);
45}