295 lines
8.5 KiB
C
295 lines
8.5 KiB
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)
|
|
|
|
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 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();
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Set XEN EFI runtime services function pointers. Other fields of struct efi,
|
|
* e.g. efi.systab, will be set like normal EFI.
|
|
*/
|
|
void __init xen_efi_runtime_setup(void)
|
|
{
|
|
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.set_variable_nonblocking = xen_efi_set_variable;
|
|
efi.query_variable_info = xen_efi_query_variable_info;
|
|
efi.query_variable_info_nonblocking = 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;
|
|
}
|