linux-kernel - Re: [PATCH] x86/xen: fix xsave capability setting

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Date:   Wed, 26 Apr 2017 09:51:35 -0400
From:   Boris Ostrovsky <boris.ostrovsky@...cle.com>
To:     Juergen Gross <jgross@...e.com>, linux-kernel@...r.kernel.org,
        xen-devel@...ts.xenproject.org
Subject: Re: [PATCH] x86/xen: fix xsave capability setting

On 04/25/2017 02:47 AM, Juergen Gross wrote:
> Commit 690b7f10b4f9f ("x86/xen: use capabilities instead of fake cpuid
> values for xsave") introduced a regression as it tried to make use of
> the fixup feature before it being available.
>
> Fall back to the old variant testing via cpuid().
>
> Signed-off-by: Juergen Gross <jgross@...e.com>

Reviewed-by: Boris Ostrovsky <boris.osrtovsky@...cle.com>

(This, BTW, was apparently broken on Intel as well, at least if you go
back to Xen 4.1).