linux-kernel - Re: [patch V2 4/5] x86/mm/debug_pagetables: Allow dumping current pagetables

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Message-ID: <42b00525-e827-5556-46ac-a682a1282858@linux.intel.com>
Date:   Mon, 27 Nov 2017 10:18:12 -0800
From:   Dave Hansen <dave.hansen@...ux.intel.com>
To:     Thomas Gleixner <tglx@...utronix.de>,
        LKML <linux-kernel@...r.kernel.org>
Cc:     Andy Lutomirski <luto@...nel.org>, Ingo Molnar <mingo@...nel.org>,
        Borislav Petkov <bp@...en8.de>,
        Brian Gerst <brgerst@...il.com>,
        Denys Vlasenko <dvlasenk@...hat.com>,
        "H. Peter Anvin" <hpa@...or.com>,
        Josh Poimboeuf <jpoimboe@...hat.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Rik van Riel <riel@...hat.com>, daniel.gruss@...k.tugraz.at,
        hughd@...gle.com, keescook@...gle.com, linux-mm@...ck.org,
        michael.schwarz@...k.tugraz.at, moritz.lipp@...k.tugraz.at,
        richard.fellner@...dent.tugraz.at
Subject: Re: [patch V2 4/5] x86/mm/debug_pagetables: Allow dumping current
 pagetables

On 11/26/2017 03:14 PM, Thomas Gleixner wrote:
> -void ptdump_walk_pgd_level_debugfs(struct seq_file *m, pgd_t *pgd)
> +void ptdump_walk_pgd_level_debugfs(struct seq_file *m, pgd_t *pgd, bool shadow)
>  {
> +	if (shadow)
> +		pgd += PTRS_PER_PGD;
>  	ptdump_walk_pgd_level_core(m, pgd, false, false);
>  }

Same comment about calculating the shadow pgd.