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From: Wanpeng Li <wanpeng.li@linux.intel.com>
To: Nadav Amit <nadav.amit@gmail.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>,
	fenghua.yu@intel.com, kvm list <kvm@vger.kernel.org>,
	linux-kernel@vger.kernel.org
Subject: Re: KVM causes #GP on XRSTORS
Date: Fri, 21 Nov 2014 08:10:33 +0800	[thread overview]
Message-ID: <20141121001033.GA10834@kernel> (raw)
In-Reply-To: <AA52FB0B-FB19-4DC0-964B-2984040B15A6@gmail.com>

Hi Nadav,
On Thu, Nov 20, 2014 at 06:34:04PM +0200, Nadav Amit wrote:
>Fenghua,
>
>I got KVM (v3.17) crashing on a machine that supports XRSTORS - It appears to get a #GP when it is trying to load the guest FPU.
>One reason for the #GP is that XCOMP_BV[63] is zeroed on the guest_fpu, but I am not sure it is the only problem.
>Was KVM ever tested with XRSTORS?

Current kvm and qemu use standard format and xsaves/xrstors should use
compact format, in addition, vmx is still not enabled for xsaves/xrstors 
in kvm.

Regards,
Wanpeng Li 

>
>Thanks,
>Nadav
>
>--
>To unsubscribe from this list: send the line "unsubscribe kvm" in
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>More majordomo info at  http://vger.kernel.org/majordomo-info.html

  parent reply	other threads:[~2014-11-21  0:10 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-11-20 16:34 KVM causes #GP on XRSTORS Nadav Amit
2014-11-20 22:18 ` Yu, Fenghua
2014-11-21  0:10 ` Wanpeng Li [this message]
2014-11-21  1:09   ` Nadav Amit
2014-11-21 14:46 ` Paolo Bonzini
2014-11-21 18:34   ` Paolo Bonzini
2014-11-24  2:05   ` Wanpeng Li
2014-11-25 18:41   ` Eduardo Habkost

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