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[10/15] efi/x86: Support builtin command line

Message ID 20200508180157.1816-11-ardb@kernel.org
State New
Headers show
Series [01/15] efi/x86: Use correct size for boot_params | expand

Commit Message

Ard Biesheuvel May 8, 2020, 6:01 p.m. UTC 
From: Arvind Sankar <nivedita@alum.mit.edu>

Add support for the x86 CMDLINE_BOOL and CMDLINE_OVERRIDE configuration
options.

Signed-off-by: Arvind Sankar <nivedita@alum.mit.edu>
Link: https://lore.kernel.org/r/20200430182843.2510180-11-nivedita@alum.mit.edu
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
---
 drivers/firmware/efi/libstub/x86-stub.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)
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Patch

diff --git a/drivers/firmware/efi/libstub/x86-stub.c b/drivers/firmware/efi/libstub/x86-stub.c
index f1a134596b53..c84c5678e3e1 100644
--- a/drivers/firmware/efi/libstub/x86-stub.c
+++ b/drivers/firmware/efi/libstub/x86-stub.c
@@ -680,7 +680,6 @@  unsigned long efi_main(efi_handle_t handle,
 	unsigned long buffer_start, buffer_end;
 	struct setup_header *hdr = &boot_params->hdr;
 	efi_status_t status;
-	unsigned long cmdline_paddr;
 
 	efi_system_table = sys_table_arg;
 
@@ -739,9 +738,14 @@  unsigned long efi_main(efi_handle_t handle,
 		image_offset = 0;
 	}
 
-	cmdline_paddr = ((u64)hdr->cmd_line_ptr |
-			 ((u64)boot_params->ext_cmd_line_ptr << 32));
-	efi_parse_options((char *)cmdline_paddr);
+#ifdef CONFIG_CMDLINE_BOOL
+	efi_parse_options(CONFIG_CMDLINE);
+#endif
+	if (!IS_ENABLED(CONFIG_CMDLINE_OVERRIDE)) {
+		unsigned long cmdline_paddr = ((u64)hdr->cmd_line_ptr |
+					       ((u64)boot_params->ext_cmd_line_ptr << 32));
+		efi_parse_options((char *)cmdline_paddr);
+	}
 
 	/*
 	 * At this point, an initrd may already have been loaded by the