linux-kernel - Re: [REGRESSION 5.0.x] Windows XP broken on KVM

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Message-ID: <20190418075328.GA19532@kroah.com>
Date:   Thu, 18 Apr 2019 09:53:28 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Takashi Iwai <tiwai@...e.de>
Cc:     Paolo Bonzini <pbonzini@...hat.com>,
        Sean Christopherson <sean.j.christopherson@...el.com>,
        Jiri Slaby <jslaby@...e.cz>, linux-kernel@...r.kernel.org
Subject: Re: [REGRESSION 5.0.x] Windows XP broken on KVM

On Thu, Apr 18, 2019 at 09:38:52AM +0200, Takashi Iwai wrote:
> Hi,
> 
> we've got a regression report on the recent 5.0.x kernel, starting
> from 5.0.6, where Windows XP can't boot on KVM any longer.
> 
> The culprit seems to be the patch
>    KVM: x86: update %rip after emulating IO
> with the upstream commit 45def77ebf79e2e8942b89ed79294d97ce914fa0.
> Reverting this alone fixed the problem.
> 
> The report is found at openSUSE bugzilla:
>   https://bugzilla.suse.com/show_bug.cgi?id=1132694
> 
> Is there already a followup fix?  If not, we need to revert it from
> stable, at least.

Is this also a problem in 5.1-rc5?

Those KVM tests being integrated by Linaro into the stable testing
process can't come fast enough, I was told yesterday that they would be
in there "soon"...

thanks,

greg k-h