From: Paolo Bonzini <pbonzini@redhat.com>
To: Eduardo Habkost <ehabkost@redhat.com>, qemu-devel@nongnu.org
Cc: libvir-list@redhat.com, Richard Henderson <rth@twiddle.net>
Subject: Re: [Qemu-devel] [QEMU PATCH] target-i386: Disable rdtscp on Opteron_G* CPU models
Date: Mon, 16 Nov 2015 10:44:59 +0100 [thread overview]
Message-ID: <5649A59B.1090209@redhat.com> (raw)
In-Reply-To: <1447441633-32526-1-git-send-email-ehabkost@redhat.com>
On 13/11/2015 20:07, Eduardo Habkost wrote:
> KVM can't virtualize rdtscp on AMD CPUs yet, so there's no point
> in enabling it by default on AMD CPU models, as all we are
> getting are confused users because of the "host doesn't support
> requested feature" warnings.
>
> Disable rdtscp on Opteron_G* models, but keep compatibility on
> pc-*-2.4 and older (just in case there are people are doing funny
> stuff using AMD CPU models on Intel hosts).
>
> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Can we do it only on KVM and not on TCG?
Paolo
next prev parent reply other threads:[~2015-11-16 9:45 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-11-13 19:07 [Qemu-devel] [QEMU PATCH] target-i386: Disable rdtscp on Opteron_G* CPU models Eduardo Habkost
2015-11-16 9:44 ` Paolo Bonzini [this message]
2015-11-16 13:19 ` Eduardo Habkost
2015-11-17 14:42 ` Eduardo Habkost
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