Re: [PATCH 1/4] x86, ptdump: Add the functionality to dump anarbitrary pagetable

[Joe Perches]

On Sat, 2014-01-11 at 21:49 +0100, Borislav Petkov wrote:
> From: Borislav Petkov <bp@xxxxxxx>
> 
> With reusing the ->trampoline_pgd page table for mapping EFI regions in
> order to use them after having switched to EFI virtual mode, it is very
> useful to be able to dump aforementioned page table in dmesg. This adds
> that functionality through the walk_pgd_level() interface which can be
> called from somewhere else.
[]
> diff --git a/arch/x86/mm/dump_pagetables.c b/arch/x86/mm/dump_pagetables.c
[]
> @@ -306,6 +326,11 @@ static void walk_pgd_level(struct seq_file *m)
>  	int i;
>  	struct pg_state st;
>  
> +	if (pgd) {
> +		start = pgd;
> +		dump_to_dmesg = true;
> +	}

	else
		dump_to_dmesg = false;

?


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