Re: [PATCH 2/5] efi: Dump the EFI page table

From: Matt Fleming
Date: Mon Jan 20 2014 - 08:38:21 EST


On Sat, 18 Jan, at 12:48:15PM, Borislav Petkov wrote:
> From: Borislav Petkov <bp@xxxxxxx>
>
> This is very useful for debugging issues with the recently added
> pagetable switching code for EFI virtual mode.
>
> Signed-off-by: Borislav Petkov <bp@xxxxxxx>
> Tested-by: Toshi Kani <toshi.kani@xxxxxx>
> ---
> arch/x86/Kconfig | 9 +++++++++
> arch/x86/include/asm/efi.h | 1 +
> arch/x86/platform/efi/efi.c | 1 +
> arch/x86/platform/efi/efi_32.c | 1 +
> arch/x86/platform/efi/efi_64.c | 9 +++++++++
> 5 files changed, 21 insertions(+)
>
> diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
> index 02241d8dcab6..ba0d86cca926 100644
> --- a/arch/x86/Kconfig
> +++ b/arch/x86/Kconfig
> @@ -1614,6 +1614,15 @@ config EFI_STUB
>
> See Documentation/efi-stub.txt for more information.
>
> +config EFI_PGT_DUMP
> + bool "Dump the EFI pagetable"
> + depends on EFI && X86_PTDUMP
> + ---help---
> + Enable this if you want to dump the EFI page table before
> + enabling virtual mode. This can be used to debug miscellaneous
> + issues with the mapping of the EFI runtime regions into that
> + table.
> +

Would this be more suitable in arch/x86/Kconfig.debug?

--
Matt Fleming, Intel Open Source Technology Center
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