[PATCH] Add --noefistub option for linux

From: Vladimir Serbinenko <phcoder@gmail.com>
To: grub-devel@gnu.org
Cc: Vladimir Serbinenko <phcoder@gmail.com>
Subject: [PATCH] Add --noefistub option for linux
Date: Thu, 16 May 2024 21:43:46 +0300	[thread overview]
Message-ID: <20240516184346.2592-1-phcoder@gmail.com> (raw)

In some cases like loading kernel from native disk (e.g. nvme) not
supported by EFI in question efi stub is not an option. Allow
user to disable efi stub and fallback to older protocol
---
 grub-core/loader/efi/linux.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/grub-core/loader/efi/linux.c b/grub-core/loader/efi/linux.c
index bfbd95aee..0bf9d9cbb 100644
--- a/grub-core/loader/efi/linux.c
+++ b/grub-core/loader/efi/linux.c
@@ -459,10 +459,18 @@ grub_cmd_linux (grub_command_t cmd __attribute__ ((unused)),
   grub_file_t file = 0;
   struct linux_arch_kernel_header lh;
   grub_err_t err;
+  int force_legacy = 0;
 
   grub_dl_ref (my_mod);
 
-  if (grub_is_shim_lock_enabled () == true)
+  if (argc > 0 && grub_strcmp(argv[0], "--noefistub") == 0)
+    {
+      force_legacy = 1;
+      argv++;
+      argc--;
+    }
+
+  if (grub_is_shim_lock_enabled () == true || force_legacy)
     {
 #if defined(__i386__) || defined(__x86_64__)
       grub_dprintf ("linux", "shim_lock enabled, falling back to legacy Linux kernel loader\n");
-- 
2.39.2


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