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Commit 5ae3683c authored by Dave Young's avatar Dave Young Committed by Matt Fleming
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efi: Add kernel param efi=noruntime 



noefi kernel param means actually disabling efi runtime, Per suggestion
from Leif Lindholm efi=noruntime should be better. But since noefi is
already used in X86 thus just adding another param efi=noruntime for
same purpose.

Signed-off-by: default avatarDave Young <dyoung@redhat.com>
Signed-off-by: default avatarMatt Fleming <matt.fleming@intel.com>
parent 6ccc72b8

Documentation/kernel-parameters.txt

+2 −1
Original line number Diff line number Diff line
@@ -992,13 +992,14 @@ bytes respectively. Such letter suffixes can also be entirely omitted. 
			Format: {"off" | "on" | "skip[mbr]"}



	efi=		[EFI]

			Format: { "old_map", "nochunk" }

			Format: { "old_map", "nochunk", "noruntime" }

			old_map [X86-64]: switch to the old ioremap-based EFI

			runtime services mapping. 32-bit still uses this one by

			default.

			nochunk: disable reading files in "chunks" in the EFI

			boot stub, as chunking can cause problems with some

			firmware implementations.

			noruntime : disable EFI runtime services support



	efi_no_storage_paranoia [EFI; X86]

			Using this parameter you can use more than 50% of

arch/x86/platform/efi/efi.c

+2 −2
Original line number Diff line number Diff line
@@ -930,11 +930,11 @@ u64 efi_mem_attributes(unsigned long phys_addr) 
	return 0;

}



static int __init parse_efi_cmdline(char *str)

static int __init arch_parse_efi_cmdline(char *str)

{

	if (parse_option_str(str, "old_map"))

		set_bit(EFI_OLD_MEMMAP, &efi.flags);



	return 0;

}

early_param("efi", parse_efi_cmdline);
 
early_param("efi", arch_parse_efi_cmdline);

drivers/firmware/efi/efi.c

+9 −0
Original line number Diff line number Diff line
@@ -54,6 +54,15 @@ bool efi_runtime_disabled(void) 
	return disable_runtime;

}



static int __init parse_efi_cmdline(char *str)

{

	if (parse_option_str(str, "noruntime"))

		disable_runtime = true;



	return 0;

}

early_param("efi", parse_efi_cmdline);



static struct kobject *efi_kobj;

static struct kobject *efivars_kobj;