linux-kernel - Re: [PATCH 04/15] KVM: MMU: cache mmio info on page fault path

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Message-Id: <D05F4629-73E0-41CA-A6E4-2475D89E7A3C@suse.de>
Date:	Wed, 8 Jun 2011 11:39:16 +0200
From:	Alexander Graf <agraf@...e.de>
To:	Xiao Guangrong <xiaoguangrong@...fujitsu.com>
Cc:	Avi Kivity <avi@...hat.com>, Marcelo Tosatti <mtosatti@...hat.com>,
	LKML <linux-kernel@...r.kernel.org>, KVM <kvm@...r.kernel.org>
Subject: Re: [PATCH 04/15] KVM: MMU: cache mmio info on page fault path


On 08.06.2011, at 11:33, Xiao Guangrong wrote:

> On 06/08/2011 05:18 PM, Alexander Graf wrote:
> 
>>> 
>>> Also, when context switched, CR3 is reloaded, mmio cache info can be cleared too. right? :-)
>> 
>> Only when using SPT. In the NPT case, you will never see cr3 getting reloaded or INVLPG :).
>> 
> 
> In the NPT case, we only cache the GPA, GVA is not cached (vcpu.arch.mmio_gva is always 0) ;-)

Ah, very nice! :)


Alex

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