efi/arm/arm64: Allow SetVirtualAddressMap() to be omitted

[linux.git] / drivers / firmware / efi / libstub / efi-stub-helper.c

diff --git a/drivers/firmware/efi/libstub/efi-stub-helper.c b/drivers/firmware/efi/libstub/efi-stub-helper.c
index e94975f4655bdd50d1db4b4a8be728d266d7d02b..e4610e72b78fa2808f4307c119a538ac944526fa 100644 (file)
--- a/drivers/firmware/efi/libstub/efi-stub-helper.c
+++ b/drivers/firmware/efi/libstub/efi-stub-helper.c
@@ -1,13 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Helper functions used by the EFI stub on multiple
  * architectures. This should be #included by the EFI stub
  * implementation files.
  *
  * Copyright 2011 Intel Corporation; author Matt Fleming
- *
- * This file is part of the Linux kernel, and is made available
- * under the terms of the GNU General Public License version 2.
- *
  */
 
 #include <linux/efi.h>
@@ -34,6 +31,7 @@ static unsigned long __chunk_size = EFI_READ_CHUNK_SIZE;
 
 static int __section(.data) __nokaslr;
 static int __section(.data) __quiet;
+static int __section(.data) __novamap;
 
 int __pure nokaslr(void)
 {
@@ -43,6 +41,10 @@ int __pure is_quiet(void)
 {
        return __quiet;
 }
+int __pure novamap(void)
+{
+       return __novamap;
+}
 
 #define EFI_MMAP_NR_SLACK_SLOTS        8
 
@@ -482,6 +484,11 @@ efi_status_t efi_parse_options(char const *cmdline)
                        __chunk_size = -1UL;
                }
 
+               if (!strncmp(str, "novamap", 7)) {
+                       str += strlen("novamap");
+                       __novamap = 1;
+               }
+
                /* Group words together, delimited by "," */
                while (*str && *str != ' ' && *str != ',')
                        str++;