linux-kernel - Re: [PATCHv2 0/4] x86: 5-level related changes into decompression code

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Date:   Wed, 29 Nov 2017 20:19:02 +0100
From:   Borislav Petkov <bp@...e.de>
To:     "H. Peter Anvin" <hpa@...or.com>
Cc:     "Kirill A. Shutemov" <kirill@...temov.name>,
        Thomas Gleixner <tglx@...utronix.de>,
        "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
        Ingo Molnar <mingo@...hat.com>, x86@...nel.org,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Andy Lutomirski <luto@...capital.net>,
        Cyrill Gorcunov <gorcunov@...nvz.org>,
        Andi Kleen <ak@...ux.intel.com>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCHv2 0/4] x86: 5-level related changes into decompression
 code

On Wed, Nov 29, 2017 at 11:01:35AM -0800, H. Peter Anvin wrote:
> We can hang the machine, or we can triple-fault it in the hope of
> triggering a reset, and that way if the bootloader has been configured
> with a backup kernel there is a hope of recovery.

Well, it triple-faults right now and that's not really user-friendly. If
we can't dump a message than we should make X86_5LEVEL depend on BROKEN
for the time being...

-- 
Regards/Gruss,
    Boris.

SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton, HRB 21284 (AG Nürnberg)
--