Merge tag 'efi-2026-07-rc2-2' of https://source.denx.de/u-boot/custodians/u-boot-efi

Pull request efi-2026-07-rc2-2

CI: https://source.denx.de/u-boot/custodians/u-boot-efi/-/pipelines/29993

UEFI:

* initialize variables in efi_dp_from_http()
* cmd: eficonfig: adjust struct eficonfig_entry, field key
* efi_dt_fixup: use fdtdec_get_bool() for reading boolean no-map property
* efi_selftest_memory: check for duplicates first
* simplify efi_mem_sort() using list_for_each_entry_safe

Others:

* lmb: document allocation flags constants

include/efi_config.h

@@ -24,7 +24,7 @@ typedef efi_status_t (*eficonfig_entry_func)(void *data);
  *
  * @num:	menu entry index
  * @title:	title of entry
- * @key:	unique key
+ * @key:	unique key, takes a number up to EFICONFIG_ENTRY_NUM_MAX - 1
  * @efi_menu:	pointer to the menu structure
  * @func:	callback function to be called when this entry is selected
  * @data:	data to be passed to the callback function, caller must free() this pointer
@@ -33,7 +33,7 @@ typedef efi_status_t (*eficonfig_entry_func)(void *data);
 struct eficonfig_entry {
 	u32 num;
 	char *title;
-	char key[3];
+	char key[11];
 	struct efimenu *efi_menu;
 	eficonfig_entry_func func;
 	void *data;

include/lmb.h

@@ -19,16 +19,36 @@
 #define LMB_ALIST_INITIAL_SIZE	4
 
 /**
- * DOC: Memory region attribute flags.
+ * define LMB_NONE - no special request
  *
- * %LMB_NONE: No special request
- * %LMB_NOMAP: Don't add to MMU configuration
- * %LMB_NOOVERWRITE: The memory region cannot be overwritten/re-reserved
- * %LMB_NONOTIFY: Do not notify other modules of changes to this memory region
+ * LMB Memory region attribute flag to indicate that there are no special
+ * requests for this region. Normally used as a placeholder value.
  */
 #define LMB_NONE 0
+
+/**
+ * define LMB_NOMAP - do not add to MMU configuration
+ *
+ * LMB Memory region attribute flag to indicate that the region will not be
+ * mapped by LMB. Normally used for reserved regions.
+ */
 #define LMB_NOMAP BIT(1)
+
+/**
+ * define LMB_NOOVERWRITE - do not overwrite/re-reserve
+ *
+ * LMB Memory region attribute flag to indicate that the region will not be
+ * overwritten or re-reserved. Normally used for reserved regions.
+ */
 #define LMB_NOOVERWRITE BIT(2)
+
+/**
+ * define LMB_NONOTIFY - do not notify other modules of changes
+ *
+ * LMB Memory region attribute flag to indicate that the region will not notify
+ * downstream allocators (currently just the EFI allocator) of changes to this
+ * region through lmb_map_update_notify().
+ */
 #define LMB_NONOTIFY BIT(3)
 
 /**

lib/efi_loader/efi_device_path.c

@@ -955,8 +955,8 @@ struct efi_device_path *efi_dp_from_http(const char *server, struct udevice *dev
 	efi_uintn_t uridp_len;
 	char *pos;
 	char tmp[128];
-	struct efi_ipv4_address ip;
-	struct efi_ipv4_address mask;
+	struct efi_ipv4_address ip = { .ip_addr = { 0, 0, 0, 0 } };
+	struct efi_ipv4_address mask = { .ip_addr = { 0, 0, 0, 0 } };
 
 	if ((server && strlen("http://") + strlen(server) + 1  > sizeof(tmp)) ||
 	    (!server && IS_ENABLED(CONFIG_NET_LWIP)))

lib/efi_loader/efi_dt_fixup.c

@@ -123,8 +123,7 @@ void efi_carve_out_dt_rsv(void *fdt)
 			    fdtdec_get_is_enabled(fdt, subnode)) {
 				bool nomap;
 
-				nomap = !!fdt_getprop(fdt, subnode, "no-map",
-						      NULL);
+				nomap = fdtdec_get_bool(fdt, subnode, "no-map");
 				efi_reserve_memory(fdt_addr, fdt_size, nomap);
 			}
 			subnode = fdt_next_subnode(fdt, subnode);

lib/efi_loader/efi_memory.c

@@ -128,44 +128,29 @@ static uint64_t desc_get_end(struct efi_mem_desc *desc)
  */
 static void efi_mem_sort(void)
 {
-	struct efi_mem_list *lmem;
-	struct efi_mem_list *prevmem = NULL;
-	bool merge_again = true;
+	struct efi_mem_list *curmem, *nextmem = NULL;
 
 	list_sort(NULL, &efi_mem, efi_mem_cmp);
 
 	/* Now merge entries that can be merged */
-	while (merge_again) {
-		merge_again = false;
-		list_for_each_entry(lmem, &efi_mem, link) {
-			struct efi_mem_desc *prev;
-			struct efi_mem_desc *cur;
-			uint64_t pages;
+	list_for_each_entry_safe(curmem, nextmem, &efi_mem, link) {
+		struct efi_mem_desc *cur;
+		struct efi_mem_desc *next;
 
-			if (!prevmem) {
-				prevmem = lmem;
-				continue;
-			}
+		/* Exit when we've got nothing to compare with */
+		if (&nextmem->link == &efi_mem)
+			break;
 
-			cur = &lmem->desc;
-			prev = &prevmem->desc;
+		cur = &curmem->desc;
+		next = &nextmem->desc;
 
-			if ((desc_get_end(cur) == prev->physical_start) &&
-			    (prev->type == cur->type) &&
-			    (prev->attribute == cur->attribute)) {
-				/* There is an existing map before, reuse it */
-				pages = cur->num_pages;
-				prev->num_pages += pages;
-				prev->physical_start -= pages << EFI_PAGE_SHIFT;
-				prev->virtual_start -= pages << EFI_PAGE_SHIFT;
-				list_del(&lmem->link);
-				free(lmem);
-
-				merge_again = true;
-				break;
-			}
-
-			prevmem = lmem;
+		if ((cur->physical_start == desc_get_end(next)) &&
+		    (cur->type == next->type) &&
+		    (cur->attribute == next->attribute)) {
+			/* There is another similar map coming up, reuse it */
+			next->num_pages += cur->num_pages;
+			list_del(&curmem->link);
+			free(curmem);
 		}
 	}
 }

lib/efi_selftest/efi_selftest_memory.c

@@ -60,7 +60,7 @@ static int find_in_memory_map(efi_uintn_t map_size,
 			      u64 addr, int memory_type)
 {
 	efi_uintn_t i;
-	bool found = false;
+	struct efi_mem_desc *match = NULL;
 
 	for (i = 0; map_size; ++i, map_size -= desc_size) {
 		struct efi_mem_desc *entry = &memory_map[i];
@@ -72,24 +72,23 @@ static int find_in_memory_map(efi_uintn_t map_size,
 
 		if (addr >= entry->physical_start &&
 		    addr < entry->physical_start +
-			    (entry->num_pages << EFI_PAGE_SHIFT)) {
-			if (found) {
+				    (entry->num_pages << EFI_PAGE_SHIFT)) {
+			if (match) {
 				efi_st_error("Duplicate memory map entry\n");
 				return EFI_ST_FAILURE;
 			}
-			found = true;
-			if (memory_type != entry->type) {
-				efi_st_error
-					("Wrong memory type %d, expected %d\n",
-					 entry->type, memory_type);
-				return EFI_ST_FAILURE;
-			}
+			match = entry;
 		}
 	}
-	if (!found) {
+	if (!match) {
 		efi_st_error("Missing memory map entry\n");
 		return EFI_ST_FAILURE;
 	}
+	if (memory_type != match->type) {
+		efi_st_error("Wrong memory type %d, expected %d\n", match->type,
+			     memory_type);
+		return EFI_ST_FAILURE;
+	}
 	return EFI_ST_SUCCESS;
 }