From: Avi Kivity <avi@redhat.com>
To: Marcelo Tosatti <mtosatti@redhat.com>
Cc: kvm@vger.kernel.org
Subject: Re: [PATCH] KVM: VMX: Pass cr0.mp through to the guest when the fpu is active
Date: Sun, 24 Jan 2010 16:31:17 +0200 [thread overview]
Message-ID: <4B5C59B5.5040406@redhat.com> (raw)
In-Reply-To: <1264343200-16913-1-git-send-email-avi@redhat.com>
On 01/24/2010 04:26 PM, Avi Kivity wrote:
> When cr0.mp is clear, the guest doesn't expect a #NM in response to
> a WAIT instruction. Because we always keep cr0.mp set, it will get
> a #NM, and potentially be confused.
>
> Fix by keeping cr0.mp set only when the fpu is inactive, and passing
> it through when inactive.
>
Note: since all reasonable guests set cr0.mp, and those that don't
shouldn't issue fwait, there's no need to queue this for .33 or stable.
--
error compiling committee.c: too many arguments to function
next prev parent reply other threads:[~2010-01-24 14:31 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-01-24 14:26 [PATCH] KVM: VMX: Pass cr0.mp through to the guest when the fpu is active Avi Kivity
2010-01-24 14:31 ` Avi Kivity [this message]
2010-01-25 13:32 ` Marcelo Tosatti
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