On Tue, Sep 4, 2012 at 9:55 AM, Matthew Garrett <mjg@xxxxxxxxxx> wrote:
> From: Josh Boyer <jwboyer@xxxxxxxxxx>
>
> This option allows userspace to pass the RSDP address to the kernel. This
> could potentially be used to circumvent the secure boot trust model.
> We ignore the setting if we don't have the CAP_SECURE_FIRMWARE capability.
Does this mean, acpi_rsdp is disabled on all current platforms that
don't support CAP_SECURE_FIRMWARE?
-- Shuah
>
> Signed-off-by: Josh Boyer <jwboyer@xxxxxxxxxx>
> ---
> drivers/acpi/osl.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c
> index 9eaf708..50c94e4 100644
> --- a/drivers/acpi/osl.c
> +++ b/drivers/acpi/osl.c
> @@ -246,7 +246,7 @@ early_param("acpi_rsdp", setup_acpi_rsdp);
> acpi_physical_address __init acpi_os_get_root_pointer(void)
> {
> #ifdef CONFIG_KEXEC
> - if (acpi_rsdp)
> + if (acpi_rsdp && capable(CAP_SECURE_FIRMWARE))
> return acpi_rsdp;
> #endif
>
> --
> 1.7.11.4
>
> --
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