136 строки
4.5 KiB
C
136 строки
4.5 KiB
C
/*
|
|
* Copyright (c) 2014 Oracle Co., Daniel Kiper
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along
|
|
* with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include <linux/bitops.h>
|
|
#include <linux/efi.h>
|
|
#include <linux/init.h>
|
|
#include <linux/string.h>
|
|
|
|
#include <xen/xen.h>
|
|
#include <xen/xen-ops.h>
|
|
#include <xen/interface/platform.h>
|
|
|
|
#include <asm/page.h>
|
|
#include <asm/setup.h>
|
|
#include <asm/xen/hypercall.h>
|
|
|
|
static efi_char16_t vendor[100] __initdata;
|
|
|
|
static efi_system_table_t efi_systab_xen __initdata = {
|
|
.hdr = {
|
|
.signature = EFI_SYSTEM_TABLE_SIGNATURE,
|
|
.revision = 0, /* Initialized later. */
|
|
.headersize = 0, /* Ignored by Linux Kernel. */
|
|
.crc32 = 0, /* Ignored by Linux Kernel. */
|
|
.reserved = 0
|
|
},
|
|
.fw_vendor = EFI_INVALID_TABLE_ADDR, /* Initialized later. */
|
|
.fw_revision = 0, /* Initialized later. */
|
|
.con_in_handle = EFI_INVALID_TABLE_ADDR, /* Not used under Xen. */
|
|
.con_in = EFI_INVALID_TABLE_ADDR, /* Not used under Xen. */
|
|
.con_out_handle = EFI_INVALID_TABLE_ADDR, /* Not used under Xen. */
|
|
.con_out = EFI_INVALID_TABLE_ADDR, /* Not used under Xen. */
|
|
.stderr_handle = EFI_INVALID_TABLE_ADDR, /* Not used under Xen. */
|
|
.stderr = EFI_INVALID_TABLE_ADDR, /* Not used under Xen. */
|
|
.runtime = (efi_runtime_services_t *)EFI_INVALID_TABLE_ADDR,
|
|
/* Not used under Xen. */
|
|
.boottime = (efi_boot_services_t *)EFI_INVALID_TABLE_ADDR,
|
|
/* Not used under Xen. */
|
|
.nr_tables = 0, /* Initialized later. */
|
|
.tables = EFI_INVALID_TABLE_ADDR /* Initialized later. */
|
|
};
|
|
|
|
static efi_system_table_t __init *xen_efi_probe(void)
|
|
{
|
|
struct xen_platform_op op = {
|
|
.cmd = XENPF_firmware_info,
|
|
.u.firmware_info = {
|
|
.type = XEN_FW_EFI_INFO,
|
|
.index = XEN_FW_EFI_CONFIG_TABLE
|
|
}
|
|
};
|
|
union xenpf_efi_info *info = &op.u.firmware_info.u.efi_info;
|
|
|
|
if (!xen_initial_domain() || HYPERVISOR_platform_op(&op) < 0)
|
|
return NULL;
|
|
|
|
/* Here we know that Xen runs on EFI platform. */
|
|
|
|
efi.get_time = xen_efi_get_time;
|
|
efi.set_time = xen_efi_set_time;
|
|
efi.get_wakeup_time = xen_efi_get_wakeup_time;
|
|
efi.set_wakeup_time = xen_efi_set_wakeup_time;
|
|
efi.get_variable = xen_efi_get_variable;
|
|
efi.get_next_variable = xen_efi_get_next_variable;
|
|
efi.set_variable = xen_efi_set_variable;
|
|
efi.query_variable_info = xen_efi_query_variable_info;
|
|
efi.update_capsule = xen_efi_update_capsule;
|
|
efi.query_capsule_caps = xen_efi_query_capsule_caps;
|
|
efi.get_next_high_mono_count = xen_efi_get_next_high_mono_count;
|
|
efi.reset_system = xen_efi_reset_system;
|
|
|
|
efi_systab_xen.tables = info->cfg.addr;
|
|
efi_systab_xen.nr_tables = info->cfg.nent;
|
|
|
|
op.cmd = XENPF_firmware_info;
|
|
op.u.firmware_info.type = XEN_FW_EFI_INFO;
|
|
op.u.firmware_info.index = XEN_FW_EFI_VENDOR;
|
|
info->vendor.bufsz = sizeof(vendor);
|
|
set_xen_guest_handle(info->vendor.name, vendor);
|
|
|
|
if (HYPERVISOR_platform_op(&op) == 0) {
|
|
efi_systab_xen.fw_vendor = __pa_symbol(vendor);
|
|
efi_systab_xen.fw_revision = info->vendor.revision;
|
|
} else
|
|
efi_systab_xen.fw_vendor = __pa_symbol(L"UNKNOWN");
|
|
|
|
op.cmd = XENPF_firmware_info;
|
|
op.u.firmware_info.type = XEN_FW_EFI_INFO;
|
|
op.u.firmware_info.index = XEN_FW_EFI_VERSION;
|
|
|
|
if (HYPERVISOR_platform_op(&op) == 0)
|
|
efi_systab_xen.hdr.revision = info->version;
|
|
|
|
op.cmd = XENPF_firmware_info;
|
|
op.u.firmware_info.type = XEN_FW_EFI_INFO;
|
|
op.u.firmware_info.index = XEN_FW_EFI_RT_VERSION;
|
|
|
|
if (HYPERVISOR_platform_op(&op) == 0)
|
|
efi.runtime_version = info->version;
|
|
|
|
return &efi_systab_xen;
|
|
}
|
|
|
|
void __init xen_efi_init(void)
|
|
{
|
|
efi_system_table_t *efi_systab_xen;
|
|
|
|
efi_systab_xen = xen_efi_probe();
|
|
|
|
if (efi_systab_xen == NULL)
|
|
return;
|
|
|
|
strncpy((char *)&boot_params.efi_info.efi_loader_signature, "Xen",
|
|
sizeof(boot_params.efi_info.efi_loader_signature));
|
|
boot_params.efi_info.efi_systab = (__u32)__pa(efi_systab_xen);
|
|
boot_params.efi_info.efi_systab_hi = (__u32)(__pa(efi_systab_xen) >> 32);
|
|
|
|
set_bit(EFI_BOOT, &efi.flags);
|
|
set_bit(EFI_PARAVIRT, &efi.flags);
|
|
set_bit(EFI_64BIT, &efi.flags);
|
|
}
|