Merge tag 'efi-2019-07-rc4-2' of git://git.denx.de/u-boot-efi

Pull request for UEFI sub-system for v2019.07-rc4-2

Support for managing the non-volatile attribute of UEFI variables
is added though we do not have a backend for persistence yet.

Error messages for changes of UEFI variables are provided.

UEFI boottime service implementations are corrected.

lib/efi_loader/efi_bootmgr.c

@@ -210,7 +210,8 @@ efi_status_t efi_bootmgr_load(efi_handle_t *handle)
 		ret = EFI_CALL(efi_set_variable(
 					L"BootNext",
 					(efi_guid_t *)&efi_global_variable_guid,
-					0, 0, &bootnext));
+					EFI_VARIABLE_NON_VOLATILE, 0,
+					&bootnext));
 
 		/* load BootNext */
 		if (ret == EFI_SUCCESS) {

lib/efi_loader/efi_boottime.c

@@ -1153,11 +1153,15 @@ static efi_status_t efi_get_drivers(efi_handle_t handle,
 				++count;
 		}
 	}
+	*number_of_drivers = 0;
+	if (!count) {
+		*driver_handle_buffer = NULL;
+		return EFI_SUCCESS;
+	}
 	/*
 	 * Create buffer. In case of duplicate driver assignments the buffer
 	 * will be too large. But that does not harm.
 	 */
-	*number_of_drivers = 0;
 	*driver_handle_buffer = calloc(count, sizeof(efi_handle_t));
 	if (!*driver_handle_buffer)
 		return EFI_OUT_OF_RESOURCES;
@@ -1213,7 +1217,8 @@ static efi_status_t efi_disconnect_all_drivers
 			      &driver_handle_buffer);
 	if (ret != EFI_SUCCESS)
 		return ret;
-
+	if (!number_of_drivers)
+		return EFI_SUCCESS;
 	ret = EFI_NOT_FOUND;
 	while (number_of_drivers) {
 		r = EFI_CALL(efi_disconnect_controller(
@@ -1985,8 +1990,14 @@ out:
  */
 static efi_status_t EFIAPI efi_stall(unsigned long microseconds)
 {
+	u64 end_tick;
+
 	EFI_ENTRY("%ld", microseconds);
-	udelay(microseconds);
+
+	end_tick = get_ticks() + usec_to_tick(microseconds);
+	while (get_ticks() < end_tick)
+		efi_timer_check();
+
 	return EFI_EXIT(EFI_SUCCESS);
 }
 
@@ -2868,12 +2879,46 @@ efi_status_t EFIAPI efi_start_image(efi_handle_t image_handle,
  * @image_obj:			handle of the loaded image
  * @loaded_image_protocol:	loaded image protocol
  */
-static void efi_delete_image(struct efi_loaded_image_obj *image_obj,
-			     struct efi_loaded_image *loaded_image_protocol)
+static efi_status_t efi_delete_image
+			(struct efi_loaded_image_obj *image_obj,
+			 struct efi_loaded_image *loaded_image_protocol)
 {
+	struct efi_object *efiobj;
+	efi_status_t r, ret = EFI_SUCCESS;
+
+close_next:
+	list_for_each_entry(efiobj, &efi_obj_list, link) {
+		struct efi_handler *protocol;
+
+		list_for_each_entry(protocol, &efiobj->protocols, link) {
+			struct efi_open_protocol_info_item *info;
+
+			list_for_each_entry(info, &protocol->open_infos, link) {
+				if (info->info.agent_handle !=
+				    (efi_handle_t)image_obj)
+					continue;
+				r = EFI_CALL(efi_close_protocol
+						(efiobj, protocol->guid,
+						 info->info.agent_handle,
+						 info->info.controller_handle
+						));
+				if (r !=  EFI_SUCCESS)
+					ret = r;
+				/*
+				 * Closing protocols may results in further
+				 * items being deleted. To play it safe loop
+				 * over all elements again.
+				 */
+				goto close_next;
+			}
+		}
+	}
+
 	efi_free_pages((uintptr_t)loaded_image_protocol->image_base,
 		       efi_size_in_pages(loaded_image_protocol->image_size));
 	efi_delete_handle(&image_obj->header);
+
+	return ret;
 }
 
 /**

lib/efi_loader/efi_console.c

@@ -430,6 +430,7 @@ static efi_status_t EFIAPI efi_cout_enable_cursor(
 	EFI_ENTRY("%p, %d", this, enable);
 
 	printf(ESC"[?25%c", enable ? 'h' : 'l');
+	efi_con_mode.cursor_visible = !!enable;
 
 	return EFI_EXIT(EFI_SUCCESS);
 }

lib/efi_loader/efi_memory.c

@@ -230,6 +230,7 @@ uint64_t efi_add_memory_map(uint64_t start, uint64_t pages, int memory_type,
 	struct efi_mem_list *newlist;
 	bool carve_again;
 	uint64_t carved_pages = 0;
+	struct efi_event *evt;
 
 	EFI_PRINT("%s: 0x%llx 0x%llx %d %s\n", __func__,
 		  start, pages, memory_type, overlap_only_ram ? "yes" : "no");
@@ -315,6 +316,16 @@ uint64_t efi_add_memory_map(uint64_t start, uint64_t pages, int memory_type,
 	/* And make sure memory is listed in descending order */
 	efi_mem_sort();
 
+	/* Notify that the memory map was changed */
+	list_for_each_entry(evt, &efi_events, link) {
+		if (evt->group &&
+		    !guidcmp(evt->group,
+			     &efi_guid_event_group_memory_map_change)) {
+			efi_signal_event(evt, false);
+			break;
+		}
+	}
+
 	return start;
 }
 

lib/efi_loader/efi_variable.c

@@ -125,6 +125,8 @@ static const char *parse_attr(const char *str, u32 *attrp)
 
 		if ((s = prefix(str, "ro"))) {
 			attr |= READ_ONLY;
+		} else if ((s = prefix(str, "nv"))) {
+			attr |= EFI_VARIABLE_NON_VOLATILE;
 		} else if ((s = prefix(str, "boot"))) {
 			attr |= EFI_VARIABLE_BOOTSERVICE_ACCESS;
 		} else if ((s = prefix(str, "run"))) {
@@ -468,7 +470,7 @@ efi_status_t EFIAPI efi_set_variable(u16 *variable_name,
 		}
 	}
 
-	val = malloc(2 * data_size + strlen("{ro,run,boot}(blob)") + 1);
+	val = malloc(2 * data_size + strlen("{ro,run,boot,nv}(blob)") + 1);
 	if (!val) {
 		ret = EFI_OUT_OF_RESOURCES;
 		goto out;
@@ -480,12 +482,16 @@ efi_status_t EFIAPI efi_set_variable(u16 *variable_name,
 	 * store attributes
 	 * TODO: several attributes are not supported
 	 */
-	attributes &= (EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS);
+	attributes &= (EFI_VARIABLE_NON_VOLATILE |
+		       EFI_VARIABLE_BOOTSERVICE_ACCESS |
+		       EFI_VARIABLE_RUNTIME_ACCESS);
 	s += sprintf(s, "{");
 	while (attributes) {
 		u32 attr = 1 << (ffs(attributes) - 1);
 
-		if (attr == EFI_VARIABLE_BOOTSERVICE_ACCESS)
+		if (attr == EFI_VARIABLE_NON_VOLATILE)
+			s += sprintf(s, "nv");
+		else if (attr == EFI_VARIABLE_BOOTSERVICE_ACCESS)
 			s += sprintf(s, "boot");
 		else if (attr == EFI_VARIABLE_RUNTIME_ACCESS)
 			s += sprintf(s, "run");