Our variable services are only provided at boottime. Therefore when leaving boottime the variable function are replaced by dummy functions returning EFI_UNSUPPORTED. Move this patching of the runtime table to the variable services implementation. Executed it in ExitBootServices().
Signed-off-by: Heinrich Schuchardt xypron.glpk@gmx.de --- v2 Do not use an event but a direct call at ExitBootServices(). So we do the patching after processing all events. --- include/efi_loader.h | 2 ++ lib/efi_loader/efi_boottime.c | 3 ++- lib/efi_loader/efi_runtime.c | 9 ------- lib/efi_loader/efi_variable.c | 44 +++++++++++++++++++++++++++++++++++ 4 files changed, 48 insertions(+), 10 deletions(-)
diff --git a/include/efi_loader.h b/include/efi_loader.h index d30c4e8ef3..8d75dde569 100644 --- a/include/efi_loader.h +++ b/include/efi_loader.h @@ -327,6 +327,8 @@ extern struct list_head efi_register_notify_events; efi_status_t efi_init_obj_list(void); /* Initialize variable services */ efi_status_t efi_init_variables(void); +/* Notify ExitBootServices() is called */ +void efi_variables_boot_exit_notify(void); /* Called by bootefi to initialize root node */ efi_status_t efi_root_node_register(void); /* Called by bootefi to initialize runtime */ diff --git a/lib/efi_loader/efi_boottime.c b/lib/efi_loader/efi_boottime.c index d104cc6b31..a929bbb671 100644 --- a/lib/efi_loader/efi_boottime.c +++ b/lib/efi_loader/efi_boottime.c @@ -1968,7 +1968,8 @@ static efi_status_t EFIAPI efi_exit_boot_services(efi_handle_t image_handle, /* Make sure that notification functions are not called anymore */ efi_tpl = TPL_HIGH_LEVEL;
- /* TODO: Should persist EFI variables here */ + /* Notify variable services */ + efi_variables_boot_exit_notify();
board_quiesce_devices();
diff --git a/lib/efi_loader/efi_runtime.c b/lib/efi_loader/efi_runtime.c index 1c8f9b8218..551470b9ac 100644 --- a/lib/efi_loader/efi_runtime.c +++ b/lib/efi_loader/efi_runtime.c @@ -424,15 +424,6 @@ static const struct efi_runtime_detach_list_struct efi_runtime_detach_list[] = { /* Clean up system table */ .ptr = &systab.boottime, .patchto = NULL, - }, { - .ptr = &efi_runtime_services.get_variable, - .patchto = &efi_device_error, - }, { - .ptr = &efi_runtime_services.get_next_variable_name, - .patchto = &efi_device_error, - }, { - .ptr = &efi_runtime_services.set_variable, - .patchto = &efi_device_error, } };
diff --git a/lib/efi_loader/efi_variable.c b/lib/efi_loader/efi_variable.c index 6210425f5e..bc8ed678c9 100644 --- a/lib/efi_loader/efi_variable.c +++ b/lib/efi_loader/efi_variable.c @@ -548,6 +548,50 @@ efi_status_t __efi_runtime EFIAPI efi_query_variable_info( return EFI_UNSUPPORTED; }
+/** + * efi_get_variable_runtime() - runtime implementation of GetVariable() + */ +static efi_status_t __efi_runtime EFIAPI +efi_get_variable_runtime(u16 *variable_name, const efi_guid_t *vendor, + u32 *attributes, efi_uintn_t *data_size, void *data) +{ + return EFI_UNSUPPORTED; +} + +/** + * efi_get_next_variable_name_runtime() - runtime implementation of + * GetNextVariable() + */ +static efi_status_t __efi_runtime EFIAPI +efi_get_next_variable_name_runtime(efi_uintn_t *variable_name_size, + u16 *variable_name, const efi_guid_t *vendor) +{ + return EFI_UNSUPPORTED; +} + +/** + * efi_set_variable_runtime() - runtime implementation of SetVariable() + */ +static efi_status_t __efi_runtime EFIAPI +efi_set_variable_runtime(u16 *variable_name, const efi_guid_t *vendor, + u32 attributes, efi_uintn_t data_size, + const void *data) +{ + return EFI_UNSUPPORTED; +} + +/** + * efi_variables_boot_exit_notify() - notify ExitBootServices() is called + */ +void efi_variables_boot_exit_notify(void) +{ + efi_runtime_services.get_variable = efi_get_variable_runtime; + efi_runtime_services.get_next_variable_name = + efi_get_next_variable_name_runtime; + efi_runtime_services.set_variable = efi_set_variable_runtime; + efi_update_table_header_crc32(&efi_runtime_services.hdr); +} + /** * efi_init_variables() - initialize variable services * -- 2.20.1