linux-kernel - Re: [RFC PATCH 2/2] KVM: MMU: return page fault error code from permission

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Message-ID: <56E17ECB.1000107@linux.intel.com>
Date:	Thu, 10 Mar 2016 22:03:55 +0800
From:	Xiao Guangrong <guangrong.xiao@...ux.intel.com>
To:	Paolo Bonzini <pbonzini@...hat.com>, linux-kernel@...r.kernel.org,
	kvm@...r.kernel.org
Cc:	huaitong.han@...el.com
Subject: Re: [RFC PATCH 2/2] KVM: MMU: return page fault error code from
 permission_fault



On 03/08/2016 07:45 PM, Paolo Bonzini wrote:
> Intel's new PKU extension introduces a bit of the page fault error code
> that must be dynamically computed after the PTE lookup (unlike I/D, U/S
> and W/R).  To ease this, these two patches make permission_fault return
> the page fault error code.
>
> Right now it only adds the P bit to the input parameter "pfec", but PKU
> can change that.

Yep, i got the same idea when i reviewed the pkey patchset. This patch
looks good to me.

Reviewed-by: Xiao Guangrong <guangrong.xiao@...ux.intel.com>