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
>
>--
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next parent reply other threads:[~2014-11-21 0:31 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <AA52FB0B-FB19-4DC0-964B-2984040B15A6@gmail.com>
2014-11-21 0:10 ` Wanpeng Li [this message]
2014-11-21 1:09 ` KVM causes #GP on XRSTORS Nadav Amit
[not found] ` <546F505F.9080309@redhat.com>
2014-11-24 2:05 ` Wanpeng Li
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