From e0d1a1ea68c47b29d93bfc375d984fe0aee21093 Mon Sep 17 00:00:00 2001 From: Masahisa Kojima Date: Fri, 10 Nov 2023 13:25:39 +0900 Subject: [PATCH] efi_loader: add return to efibootmgr event group When the image loaded by efibootmgr returns, efibootmgr needs to clean the resources. Adding the event of returning to efibootmgr is useful to simplify the implementation. Signed-off-by: Masahisa Kojima Reviewed-by: Ilias Apalodimas Signed-off-by: Ilias Apalodimas --- cmd/bootefi.c | 12 ++++++++++++ include/efi_api.h | 3 +++ include/efi_loader.h | 2 ++ lib/efi_loader/efi_boottime.c | 3 +++ 4 files changed, 20 insertions(+) diff --git a/cmd/bootefi.c b/cmd/bootefi.c index 20e5c94a33..4d74969ad6 100644 --- a/cmd/bootefi.c +++ b/cmd/bootefi.c @@ -356,6 +356,7 @@ static efi_status_t do_bootefi_exec(efi_handle_t handle, void *load_options) efi_status_t ret; efi_uintn_t exit_data_size = 0; u16 *exit_data = NULL; + struct efi_event *evt; /* On ARM switch from EL3 or secure mode to EL2 or non-secure mode */ switch_to_non_secure_mode(); @@ -394,6 +395,17 @@ out: log_err("Failed to remove loadfile2 for initrd\n"); } + /* Notify EFI_EVENT_GROUP_RETURN_TO_EFIBOOTMGR event group. */ + list_for_each_entry(evt, &efi_events, link) { + if (evt->group && + !guidcmp(evt->group, + &efi_guid_event_group_return_to_efibootmgr)) { + efi_signal_event(evt); + EFI_CALL(systab.boottime->close_event(evt)); + break; + } + } + /* Control is returned to U-Boot, disable EFI watchdog */ efi_set_watchdog(0); diff --git a/include/efi_api.h b/include/efi_api.h index c2d6964467..0e92cb8a7f 100644 --- a/include/efi_api.h +++ b/include/efi_api.h @@ -404,6 +404,9 @@ struct efi_runtime_services { #define EFI_EVENT_GROUP_RESET_SYSTEM \ EFI_GUID(0x62da6a56, 0x13fb, 0x485a, 0xa8, 0xda, \ 0xa3, 0xdd, 0x79, 0x12, 0xcb, 0x6b) +#define EFI_EVENT_GROUP_RETURN_TO_EFIBOOTMGR \ + EFI_GUID(0xb4a40fe6, 0x9149, 0x4f29, 0x94, 0x47, \ + 0x49, 0x38, 0x7a, 0x7f, 0xab, 0x87) /* EFI Configuration Table and GUID definitions */ #define NULL_GUID \ diff --git a/include/efi_loader.h b/include/efi_loader.h index 1fd7b0b73c..664dae28f8 100644 --- a/include/efi_loader.h +++ b/include/efi_loader.h @@ -289,6 +289,8 @@ extern const efi_guid_t efi_guid_event_group_memory_map_change; extern const efi_guid_t efi_guid_event_group_ready_to_boot; /* event group ResetSystem() invoked (before ExitBootServices) */ extern const efi_guid_t efi_guid_event_group_reset_system; +/* event group return to efibootmgr */ +extern const efi_guid_t efi_guid_event_group_return_to_efibootmgr; /* GUID of the device tree table */ extern const efi_guid_t efi_guid_fdt; extern const efi_guid_t efi_guid_loaded_image; diff --git a/lib/efi_loader/efi_boottime.c b/lib/efi_loader/efi_boottime.c index f9b10a9763..3767fa2db4 100644 --- a/lib/efi_loader/efi_boottime.c +++ b/lib/efi_loader/efi_boottime.c @@ -90,6 +90,9 @@ const efi_guid_t efi_guid_event_group_ready_to_boot = /* event group ResetSystem() invoked (before ExitBootServices) */ const efi_guid_t efi_guid_event_group_reset_system = EFI_EVENT_GROUP_RESET_SYSTEM; +/* event group return to efibootmgr */ +const efi_guid_t efi_guid_event_group_return_to_efibootmgr = + EFI_EVENT_GROUP_RETURN_TO_EFIBOOTMGR; /* GUIDs of the Load File and Load File2 protocols */ const efi_guid_t efi_guid_load_file_protocol = EFI_LOAD_FILE_PROTOCOL_GUID; const efi_guid_t efi_guid_load_file2_protocol = EFI_LOAD_FILE2_PROTOCOL_GUID; -- 2.39.5