linux/arch/x86/xen/efi.c
Shannon Zhao a62ed50030 XEN: EFI: Move x86 specific codes to architecture directory
Move x86 specific codes to architecture directory and export those EFI
runtime service functions. This will be useful for initializing runtime
service on ARM later.

Signed-off-by: Shannon Zhao <shannon.zhao@linaro.org>
Reviewed-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Tested-by: Julien Grall <julien.grall@arm.com>
Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>
2016-07-06 10:34:46 +01:00

157 lines
5.5 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 const struct efi efi_xen __initconst = {
.systab = NULL, /* Initialized later. */
.runtime_version = 0, /* Initialized later. */
.mps = EFI_INVALID_TABLE_ADDR,
.acpi = EFI_INVALID_TABLE_ADDR,
.acpi20 = EFI_INVALID_TABLE_ADDR,
.smbios = EFI_INVALID_TABLE_ADDR,
.smbios3 = EFI_INVALID_TABLE_ADDR,
.sal_systab = EFI_INVALID_TABLE_ADDR,
.boot_info = EFI_INVALID_TABLE_ADDR,
.hcdp = EFI_INVALID_TABLE_ADDR,
.uga = EFI_INVALID_TABLE_ADDR,
.uv_systab = EFI_INVALID_TABLE_ADDR,
.fw_vendor = EFI_INVALID_TABLE_ADDR,
.runtime = EFI_INVALID_TABLE_ADDR,
.config_table = EFI_INVALID_TABLE_ADDR,
.get_time = xen_efi_get_time,
.set_time = xen_efi_set_time,
.get_wakeup_time = xen_efi_get_wakeup_time,
.set_wakeup_time = xen_efi_set_wakeup_time,
.get_variable = xen_efi_get_variable,
.get_next_variable = xen_efi_get_next_variable,
.set_variable = xen_efi_set_variable,
.query_variable_info = xen_efi_query_variable_info,
.update_capsule = xen_efi_update_capsule,
.query_capsule_caps = xen_efi_query_capsule_caps,
.get_next_high_mono_count = xen_efi_get_next_high_mono_count,
.reset_system = NULL, /* Functionality provided by Xen. */
.set_virtual_address_map = NULL, /* Not used under Xen. */
.flags = 0 /* 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 = efi_xen;
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);
}