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From:   Andy Lutomirski <luto@amacapital.net>
Mime-Version: 1.0 (1.0)
Subject: Re: AVX register corruption from signal delivery
Date:   Tue, 26 Nov 2019 14:30:10 -0800
Message-Id: <EFBC6B60-D0EC-4518-A38E-076D3933AA0E@amacapital.net>
References: <20191126221328.GH31379@zn.tnic>
Cc:     Barret Rhoden <brho@google.com>, austin@google.com,
        Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
        Rik van Riel <riel@surriel.com>, x86@kernel.org,
        linux-kernel@vger.kernel.org, Thomas Gleixner <tglx@linutronix.de>,
        Ingo Molnar <mingo@redhat.com>
In-Reply-To: <20191126221328.GH31379@zn.tnic>
To:     Borislav Petkov <bp@alien8.de>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk


> On Nov 26, 2019, at 2:14 PM, Borislav Petkov <bp@alien8.de> wrote:
>=20
> =EF=BB=BFOn Tue, Nov 26, 2019 at 04:23:40PM -0500, Barret Rhoden wrote:
>> Thanks; config attached.  I've been able to recreate it in QEMU with at
>> least 2 cores.
>=20
> Yap, I can too, in my VM.
>=20
> Btw, would you guys like to submit that reproducer test program
>=20
> https://bugzilla.kernel.org/attachment.cgi?id=3D286073
>=20
> into the kernel selftests pile here:
>=20
> tools/testing/selftests/x86/
>=20
> ?
>=20
> It needs proper cleanup to fit kernel coding style but it could be a
> good start for collecting interesting FPU test cases.

If we do this, we should have selftests/x86/slow or otherwise have a fast vs=
 slow mode. I really like that the entire suite takes under 2s.=