forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
294 lines
8.5 KiB
294 lines
8.5 KiB
// SPDX-License-Identifier: GPL-2.0-only |
|
/* |
|
* EFI support for Xen. |
|
* |
|
* Copyright (C) 1999 VA Linux Systems |
|
* Copyright (C) 1999 Walt Drummond <[email protected]> |
|
* Copyright (C) 1999-2002 Hewlett-Packard Co. |
|
* David Mosberger-Tang <[email protected]> |
|
* Stephane Eranian <[email protected]> |
|
* Copyright (C) 2005-2008 Intel Co. |
|
* Fenghua Yu <[email protected]> |
|
* Bibo Mao <[email protected]> |
|
* Chandramouli Narayanan <[email protected]> |
|
* Huang Ying <[email protected]> |
|
* Copyright (C) 2011 Novell Co. |
|
* Jan Beulich <[email protected]> |
|
* Copyright (C) 2011-2012 Oracle Co. |
|
* Liang Tang <[email protected]> |
|
* 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; |
|
}
|
|
|