linux-kernel - Re: [patch 0/7] x86/fpu: Cure supervisor mode (ENQCMD) fallout

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Message-ID: <YkI27CuLsDFcPWpS@otcwcpicx3.sc.intel.com>
Date:   Mon, 28 Mar 2022 15:30:04 -0700
From:   Fenghua Yu <fenghua.yu@...el.com>
To:     Thomas Gleixner <tglx@...utronix.de>
Cc:     LKML <linux-kernel@...r.kernel.org>, x86@...nel.org,
        "Chang S. Bae" <chang.seok.bae@...el.com>,
        Paolo Bonzini <bonzini@....org>,
        Tony Luck <tony.luck@...el.com>
Subject: Re: [patch 0/7] x86/fpu: Cure supervisor mode (ENQCMD) fallout

Hi, Thomas,

On Thu, Mar 24, 2022 at 02:47:07PM +0100, Thomas Gleixner wrote:
> It builds, boots on host and guest, but is not yet extensively tested.
> Testing with a AMX + PASID enabled machine has not been done at all as I
> don't have easy access to such a beast.

I run many copies of dsa_test [1] (i.e. multi-threading and multi-tasking)
to stressfully exercise FPU PASID state context switch on native.
No issue is found so far.

1. https://github.com/intel/idxd-config

Thanks.

-Fenghua