linux-kernel - Re: [PATCH 15/22] KVM: MMU: Introduce kvm_read_guest_page

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Date:	Tue, 27 Apr 2010 18:27:45 +0200
From:	Joerg Roedel <joerg.roedel@....com>
To:	Avi Kivity <avi@...hat.com>
CC:	Marcelo Tosatti <mtosatti@...hat.com>, kvm@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 15/22] KVM: MMU: Introduce kvm_read_guest_page_x86()

On Tue, Apr 27, 2010 at 07:09:37PM +0300, Avi Kivity wrote:
> On 04/27/2010 06:40 PM, Joerg Roedel wrote:
> >
> >Currently its a bit unclear when to use mmu or nested_mmu. With a
> >pointer it would be unclear to the code reader when to use the pointer
> >and when to select the mmu_contexts directly.
> 
> I think in most cases you'd want full translation, thus the pointer.
> This should be the default.  In specific cases you'd want just the
> non-nested guest translation.

Hmm, for most cases == all gva_to_gpa cases. The page fault path can't
use the pointer. I'll try out how this works. It shouldn't be too
complicated.

	Joerg


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