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From: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
To: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
Cc: gleb@redhat.com, markus@trippelsdorf.de, mtosatti@redhat.com,
	pbonzini@redhat.com, linux-kernel@vger.kernel.org,
	kvm@vger.kernel.org
Subject: Re: [PATCH] KVM: MMU: avoid fast page fault fixing mmio page fault
Date: Thu, 18 Jul 2013 12:55:45 +0800	[thread overview]
Message-ID: <51E77551.7040408@linux.vnet.ibm.com> (raw)
In-Reply-To: <1374123157-11142-1-git-send-email-xiaoguangrong@linux.vnet.ibm.com>

On 07/18/2013 12:52 PM, Xiao Guangrong wrote:
> Currently, fast page fault tries to fix mmio page fault when the
> generation number is invalid (spte.gen != kvm.gen) and returns to
> guest to retry the fault since it sees the last spte is nonpresent
> which causes infinity loop
> 
> It can be triggered only on AMD host since the mmio page fault is
> recognized as ept-misconfig

Sorry, It should be "recognized as ept-misconfig on Intel host."


  reply	other threads:[~2013-07-18  4:55 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-07-18  4:52 [PATCH] KVM: MMU: avoid fast page fault fixing mmio page fault Xiao Guangrong
2013-07-18  4:55 ` Xiao Guangrong [this message]
2013-07-18  5:31 ` Gleb Natapov
2013-07-18  6:01   ` Xiao Guangrong
2013-07-18  6:06     ` Gleb Natapov
2013-07-18  6:25       ` Xiao Guangrong
2013-07-18  6:28         ` Gleb Natapov

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