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.
Signed-off-by: AKASHI Takahiro <takahiro.aka...@linaro.org>
---
include/efi_api.h | 15 +++++++++++++++
include/efi_loader.h | 3 +++
lib/efi_loader/efi_runtime.c | 28 ++++++++++++++++++++++++++++
lib/efi_loader/efi_setup.c | 5 +++++
4 files changed, 51 insertions(+)
diff --git a/include/efi_api.h b/include/efi_api.h
index 65584dd2d82a..d7d95edd4dfc 100644
--- a/include/efi_api.h
+++ b/include/efi_api.h
@@ -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,
diff --git a/include/efi_loader.h b/include/efi_loader.h
index 23ce73226762..7bd8002e303e 100644
--- a/include/efi_loader.h
+++ b/include/efi_loader.h
@@ -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);
diff --git a/lib/efi_loader/efi_runtime.c b/lib/efi_loader/efi_runtime.c
index 60442cb21d37..cf202bb9ec07 100644
--- a/lib/efi_loader/efi_runtime.c
+++ b/lib/efi_loader/efi_runtime.c
@@ -89,6 +89,34 @@ struct elf_rela {
* handle a good number of runtime callbacks
*/
+efi_status_t efi_init_runtime_supported(void)
+{
+ u16 efi_runtime_services_supported;
+
+ /*
+ * This value must be synced with efi_runtime_detach_list
+ * as well as efi_runtime_services.
+ */
+ efi_runtime_services_supported = EFI_RT_SUPPORTED_RESET_SYSTEM;
+#ifdef CONFIG_EFI_GET_TIME
+ efi_runtime_services_supported |= EFI_RT_SUPPORTED_GET_TIME;
+#endif
+#ifdef CONFIG_EFI_SET_TIME
+ efi_runtime_services_supported |= EFI_RT_SUPPORTED_SET_TIME;
+#endif
+#ifdef CONFIG_EFI_RUNTIME_SET_VIRTUAL_ADDRESS_MAP
+ efi_runtime_services_supported |=
+ EFI_RT_SUPPORTED_SET_VIRTUAL_ADDRESS_MAP;
+#endif
+
+ 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
*
diff --git a/lib/efi_loader/efi_setup.c b/lib/efi_loader/efi_setup.c
index 45d6aca051f3..75fa344060d5 100644
--- a/lib/efi_loader/efi_setup.c
+++ b/lib/efi_loader/efi_setup.c
@@ -123,6 +123,11 @@ 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)
--
2.21.0
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