From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Zhang, Haozhong" <haozhong.zhang@intel.com>
Subject: Re: [PATCH v2 2/2] x86/hvm: add support for pcommit
	instruction
Date: Tue, 5 Jan 2016 15:15:00 +0800
Message-ID: <20160105071500.GA2440@hz-desktop.sh.intel.com>
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To: "Tian, Kevin" <kevin.tian@intel.com>
Cc: Wei Liu <wei.liu2@citrix.com>, Ian Campbell <ian.campbell@citrix.com>, Stefano Stabellini <stefano.stabellini@eu.citrix.com>, "Nakajima,
	Jun" <jun.nakajima@intel.com>, Andrew Cooper <andrew.cooper3@citrix.com>, Ian Jackson <ian.jackson@eu.citrix.com>, "xen-devel@lists.xen.org" <xen-devel@lists.xen.org>, Jan Beulich <jbeulich@suse.com>, Keir Fraser <keir@xen.org>
List-Id: xen-devel@lists.xenproject.org

On 01/05/16 15:08, Tian, Kevin wrote:
> > From: Zhang, Haozhong
> > Sent: Wednesday, December 30, 2015 7:49 PM
> > 
> > Pass PCOMMIT CPU feature into HMV domain. Currently, we do not intercept
> > pcommit instruction for L1 guest, and allow L1 to intercept pcommit
> > instruction for L2 guest.
> 
> Could you elaborate why different policies are used for L1/L2? And better
> add a comment in code (at least for vvmx) to describe the intention.
> 
> Thanks
> Kevin

The intention is that we completely expose pcommit (both the
instruction and VMEXIT caused by pcommit) to L1.

Haozhong