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efi_loader: add RuntimeServicesSupported variable

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This variable is defined in UEFI specification 2.8, section 8.1.
Its value should be updated whenever we add any usable runtime services
function.

Currently we only support SetVirtualAddress() for all systems and
ResetSystem() for some.

Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
Reviewed-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
This commit is contained in:
AKASHI Takahiro 2019-06-05 13:21:38 +09:00 committed by Heinrich Schuchardt
parent c77d8e9d89
commit e771b4b39e
4 changed files with 47 additions and 0 deletions
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15
include/efi_api.h
View file

@ -213,6 +213,21 @@ struct efi_capsule_header {
u32 capsule_image_size;
};
#define EFI_RT_SUPPORTED_GET_TIME 0x0001
#define EFI_RT_SUPPORTED_SET_TIME 0x0002
#define EFI_RT_SUPPORTED_GET_WAKEUP_TIME 0x0004
#define EFI_RT_SUPPORTED_SET_WAKEUP_TIME 0x0008
#define EFI_RT_SUPPORTED_GET_VARIABLE 0x0010
#define EFI_RT_SUPPORTED_GET_NEXT_VARIABLE_NAME 0x0020
#define EFI_RT_SUPPORTED_SET_VARIABLE 0x0040
#define EFI_RT_SUPPORTED_SET_VIRTUAL_ADDRESS_MAP 0x0080
#define EFI_RT_SUPPORTED_CONVERT_POINTER 0x0100
#define EFI_RT_SUPPORTED_GET_NEXT_HIGH_MONOTONIC_COUNT 0x0200
#define EFI_RT_SUPPORTED_RESET_SYSTEM 0x0400
#define EFI_RT_SUPPORTED_UPDATE_CAPSULE 0x0800
#define EFI_RT_SUPPORTED_QUERY_CAPSULE_CAPABILITIES 0x1000
#define EFI_RT_SUPPORTED_QUERY_VARIABLE_INFO 0x2000
struct efi_runtime_services {
struct efi_table_hdr hdr;
efi_status_t (EFIAPI *get_time)(struct efi_time *time,

3
include/efi_loader.h
View file

@ -573,6 +573,9 @@ static inline int guidcmp(const efi_guid_t *g1, const efi_guid_t *g2)
#define __efi_runtime_data __attribute__ ((section (".data.efi_runtime")))
#define __efi_runtime __attribute__ ((section (".text.efi_runtime")))
/* Indicate supported runtime services */
efi_status_t efi_init_runtime_supported(void);
/* Update CRC32 in table header */
void __efi_runtime efi_update_table_header_crc32(struct efi_table_hdr *table);

24
lib/efi_loader/efi_runtime.c
View file

@ -89,6 +89,30 @@ struct elf_rela {
* handle a good number of runtime callbacks
*/
efi_status_t efi_init_runtime_supported(void)
{
u16 efi_runtime_services_supported = 0;
/*
* This value must be synced with efi_runtime_detach_list
* as well as efi_runtime_services.
*/
#if CONFIG_IS_ENABLED(ARCH_BCM283X) || \
CONFIG_IS_ENABLED(FSL_LAYERSCAPE) || \
CONFIG_IS_ENABLED(SYSRESET_X86) || \
CONFIG_IS_ENABLED(PSCI_RESET)
efi_runtime_services_supported |= EFI_RT_SUPPORTED_RESET_SYSTEM;
#endif
efi_runtime_services_supported |=
EFI_RT_SUPPORTED_SET_VIRTUAL_ADDRESS_MAP;
return EFI_CALL(efi_set_variable(L"RuntimeServicesSupported",
&efi_global_variable_guid,
EFI_VARIABLE_BOOTSERVICE_ACCESS |
EFI_VARIABLE_RUNTIME_ACCESS,
sizeof(efi_runtime_services_supported),
&efi_runtime_services_supported));
}
/**
* efi_update_table_header_crc32() - Update crc32 in table header
*

5
lib/efi_loader/efi_setup.c
View file

@ -117,6 +117,11 @@ efi_status_t efi_init_obj_list(void)
if (ret != EFI_SUCCESS)
goto out;
/* Indicate supported runtime services */
ret = efi_init_runtime_supported();
if (ret != EFI_SUCCESS)
goto out;
/* Initialize system table */
ret = efi_initialize_system_table();
if (ret != EFI_SUCCESS)