Merge branch 'efi/queue' into 'master'

A couple EFI fixes

See merge request kvm-unit-tests/kvm-unit-tests!55
diff --git a/lib/efi.c b/lib/efi.c
index 5314eaa..4433783 100644
--- a/lib/efi.c
+++ b/lib/efi.c
@@ -204,6 +204,7 @@
 	return (char *)cmdline_addr;
 }
 
+#if defined(__aarch64__) || defined(__riscv)
 /*
  * Open the file and read it into a buffer.
  */
@@ -330,6 +331,12 @@
 
 	return fdt_check_header(fdt) == 0 ? fdt : NULL;
 }
+#else
+static void *efi_get_fdt(efi_handle_t handle, struct efi_loaded_image_64 *image)
+{
+	return NULL;
+}
+#endif
 
 static const struct {
 	struct efi_vendor_dev_path	vendor;
@@ -399,8 +406,8 @@
 	efi_system_table = sys_tab;
 
 	/* Memory map struct values */
-	efi_memory_desc_t *map = NULL;
-	unsigned long map_size = 0, desc_size = 0, key = 0, buff_size = 0;
+	efi_memory_desc_t *map;
+	unsigned long map_size, desc_size, key, buff_size;
 	u32 desc_ver;
 
 	/* Helper variables needed to get the cmdline */
@@ -439,13 +446,6 @@
 	efi_bootinfo.mem_map.key_ptr = &key;
 	efi_bootinfo.mem_map.buff_size = &buff_size;
 
-	/* Get EFI memory map */
-	status = efi_get_memory_map(&efi_bootinfo.mem_map);
-	if (status != EFI_SUCCESS) {
-		printf("Failed to get memory map\n");
-		goto efi_main_error;
-	}
-
 #ifdef __riscv
 	status = efi_get_boot_hartid();
 	if (status != EFI_SUCCESS) {
@@ -454,11 +454,22 @@
 	}
 #endif
 
-	/* 
-	 * Exit EFI boot services, let kvm-unit-tests take full control of the
-	 * guest
-	 */
-	status = efi_exit_boot_services(handle, &efi_bootinfo.mem_map);
+	status = EFI_INVALID_PARAMETER;
+	while (status == EFI_INVALID_PARAMETER) {
+		status = efi_get_memory_map(&efi_bootinfo.mem_map);
+		if (status != EFI_SUCCESS) {
+			printf("Failed to get memory map\n");
+			goto efi_main_error;
+		}
+		/*
+		 * Exit EFI boot services, let kvm-unit-tests take full
+		 * control of the guest.
+		 */
+		status = efi_exit_boot_services(handle, &efi_bootinfo.mem_map);
+		if (status == EFI_INVALID_PARAMETER)
+			efi_free_pool(*efi_bootinfo.mem_map.map);
+	}
+
 	if (status != EFI_SUCCESS) {
 		printf("Failed to exit boot services\n");
 		goto efi_main_error;