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From: Linus Torvalds <torvalds@linux-foundation.org>
Date: Tue, 21 Mar 2017 12:20:55 -0700
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Subject: Re: [lkp-robot] [x86] 69218e4799: BUG:kernel_hang_in_boot_stage
To: Thomas Garnier <thgarnie@google.com>
Cc: kernel test robot <xiaolong.ye@intel.com>,
        Ingo Molnar <mingo@kernel.org>,
        Alexander Potapenko <glider@google.com>,
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On Tue, Mar 21, 2017 at 11:16 AM, Thomas Garnier <thgarnie@google.com> wrote:
> This error happens even with Andy TLS fix on 32-bit (GDT is on fixmap
> but not readonly). I am looking into it.
>
> KVM internal error. Suberror: 3
> extra data[0]: 80000b0e
> extra data[1]: 31

If I read that right, it's extra data[1] 0x31, which EXIT_REASON_EPT_MISCONFIG.

I'm not seeing how the A bit in a GDT entry could have anything to do
with it. I'm assuming it happens even without Andy's patch?

                  Linus

From mboxrd@z Thu Jan  1 00:00:00 1970
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From: Linus Torvalds <torvalds@linux-foundation.org>
To: lkp@lists.01.org
Subject: Re: [lkp-robot] [x86] 69218e4799: BUG:kernel_hang_in_boot_stage
Date: Tue, 21 Mar 2017 12:20:55 -0700
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On Tue, Mar 21, 2017 at 11:16 AM, Thomas Garnier <thgarnie@google.com> wr=
ote:
> This error happens even with Andy TLS fix on 32-bit (GDT is on fixmap
> but not readonly). I am looking into it.
>
> KVM internal error. Suberror: 3
> extra data[0]: 80000b0e
> extra data[1]: 31

If I read that right, it's extra data[1] 0x31, which EXIT_REASON_EPT_MISCON=
FIG.

I'm not seeing how the A bit in a GDT entry could have anything to do
with it. I'm assuming it happens even without Andy's patch?

                  Linus

--===============2122805018719537361==--