Re: [PATCH 3/4] x86, efi: Add an efi= kernel command line parameter

Borislav Petkov
2013-06-04T12:18:52Z

On Sun, Jun 02, 2013 at 02:56:09PM +0200, Borislav Petkov wrote:
> From: Borislav Petkov <bp-l3A5Bk7waGM@public.gmane.org>
>
> .. for passing miscellaneous options from the kernel command line.
>
> Signed-off-by: Borislav Petkov <bp-l3A5Bk7waGM@public.gmane.org>
> ---
> arch/x86/platform/efi/efi.c | 16 ++++++++++++++++
> 1 file changed, 16 insertions(+)
>
> diff --git a/arch/x86/platform/efi/efi.c b/arch/x86/platform/efi/efi.c
> index 82089d8b1954..aea4337f7023 100644
> --- a/arch/x86/platform/efi/efi.c
> +++ b/arch/x86/platform/efi/efi.c
> @@ -88,6 +88,11 @@ static u64 active_size;
>
> unsigned long x86_efi_facility;
>
> + /* 1:1 mapping of services regions */
> +#define EFI_CFG_MAP11 BIT(0)
> +
> +static unsigned long efi_config;
> +
> /*
> * Returns 1 if 'facility' is enabled, 0 otherwise.
> */
> @@ -1167,3 +1172,14 @@ efi_status_t efi_query_variable_store(u32 attributes, unsigned long size)
> return EFI_SUCCESS;
> }
> EXPORT_SYMBOL_GPL(efi_query_variable_store);
> +
> +static int __init parse_efi_cmdline(char *str)

note to self:

#ifdef CONFIG_X86_64

> +{
> + if (*str == '=')
> + str++;
> + if (!strncmp(str, "1:1_map", 7))
> + efi_config |= EFI_CFG_MAP11;

#endif

to temporarily workaround the 64-bit only requirement.

--
Regards/Gruss,
Boris.

Sent from a fat crate under my desk. Formatting is fine.
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