372 lines
11 KiB
C
372 lines
11 KiB
C
/*
|
|
* 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 <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)
|
|
|
|
static 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;
|
|
}
|
|
|
|
static 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;
|
|
}
|
|
|
|
static 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;
|
|
}
|
|
|
|
static 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;
|
|
}
|
|
|
|
static 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;
|
|
}
|
|
|
|
static 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;
|
|
}
|
|
|
|
static 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;
|
|
}
|
|
|
|
static 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;
|
|
}
|
|
|
|
static 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;
|
|
}
|
|
|
|
static 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;
|
|
}
|
|
|
|
static 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;
|
|
}
|
|
|
|
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. */
|
|
.memmap = NULL, /* Not used under Xen. */
|
|
.flags = 0 /* Initialized later. */
|
|
};
|
|
|
|
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;
|
|
}
|