From: Peter Zijlstra <peterz@infradead.org>
To: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Eduardo Habkost <ehabkost@redhat.com>,
kvm@vger.kernel.org, pbonzini@redhat.com
Subject: Re: linux 3.13 guest crash with -cpu host
Date: Mon, 3 Feb 2014 15:12:35 +0100 [thread overview]
Message-ID: <20140203141235.GJ8874@twins.programming.kicks-ass.net> (raw)
In-Reply-To: <20140203140601.GA24944@redhat.com>
On Mon, Feb 03, 2014 at 04:06:01PM +0200, Michael S. Tsirkin wrote:
> On Mon, Feb 03, 2014 at 10:58:28AM -0200, Eduardo Habkost wrote:
> > Where does the "v2 and above have a perf capabilities MSR" claim in the code
> > come from?
>
>
> But why doesn't it crash on baremetal?
> Probably baremetal simply returns 0 or something.
> Let me try ..
The claim "v2 and above have FEATURE_PDCM" is in fact true for real
hardware.
If it didn't the rdmsr() would have generated an exception and we'd have
crashed just like your virtual thingy did.
next prev parent reply other threads:[~2014-02-03 14:12 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-02-02 20:59 linux 3.13 guest crash with -cpu host Michael S. Tsirkin
2014-02-03 12:58 ` Eduardo Habkost
2014-02-03 13:29 ` Peter Zijlstra
2014-02-03 14:06 ` Michael S. Tsirkin
2014-02-03 14:07 ` Paolo Bonzini
2014-02-03 14:42 ` Michael S. Tsirkin
2014-02-03 14:12 ` Peter Zijlstra [this message]
2014-02-03 14:19 ` Paolo Bonzini
2014-02-03 14:26 ` Peter Zijlstra
2014-02-03 14:28 ` Peter Zijlstra
2014-02-03 15:01 ` Paolo Bonzini
2014-02-03 14:45 ` Michael S. Tsirkin
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