linux-kernel - Re: [RFC][PATCH 1/6] x86/power: De-paravirt restore_processor

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Date:   Fri, 13 Jan 2023 09:14:02 +0100
From:   Juergen Gross <jgross@...e.com>
To:     Peter Zijlstra <peterz@...radead.org>, x86@...nel.org,
        Joan Bruguera <joanbrugueram@...il.com>
Cc:     linux-kernel@...r.kernel.org,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        xen-devel <xen-devel@...ts.xenproject.org>,
        Jan Beulich <jbeulich@...e.com>,
        Roger Pau Monne <roger.pau@...rix.com>,
        Kees Cook <keescook@...omium.org>, mark.rutland@....com
Subject: Re: [RFC][PATCH 1/6] x86/power: De-paravirt restore_processor_state()

On 12.01.23 15:31, Peter Zijlstra wrote:
> Since Xen PV doesn't use restore_processor_state(), and we're going to
> have to avoid CALL/RET until at least GS is restored, de-paravirt the
> easy bits.
> 
> Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>

Reviewed-by: Juergen Gross <jgross@...e.com>

with one remark: save_processor_state() could be changed the same way.


Juergen


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