From mboxrd@z Thu Jan 1 00:00:00 1970 From: Avi Kivity Subject: Re: [PATCH 0/12] KVM: SVM: Add support for VMCB state caching Date: Tue, 07 Dec 2010 11:50:12 +0200 Message-ID: <4CFE0354.6070607@redhat.com> References: <1291373159-4822-1-git-send-email-joerg.roedel@amd.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: Marcelo Tosatti , kvm@vger.kernel.org, linux-kernel@vger.kernel.org To: Joerg Roedel Return-path: In-Reply-To: <1291373159-4822-1-git-send-email-joerg.roedel@amd.com> Sender: linux-kernel-owner@vger.kernel.org List-Id: kvm.vger.kernel.org On 12/03/2010 12:45 PM, Joerg Roedel wrote: > Hi Avi, Hi Marcelo, > > here is a patch-set which adds support for VMCB state caching to KVM. > This is a new CPU feature where software can mark certain parts of the > VMCB as unchanged since the last vmexit and the hardware can then avoid > reloading these parts from memory. > > The feature is implemented downwards-compatible in hardware, so a 0-bit > means the state has changed and needs to be reloaded. This makes it > possible to implement the bits without checking for the feature, as done > in this patch-set (another reason is that the check is as expensive as > clearing the bit). Processors which do not implement VMCB state > caching just ignore these bits. > > These patches were tested with multiple guests (Windows, Linux, also in > parallel) and also with nested-svm. > > The patches apply on-top of the intercept mask wrapping patch-set I sent > earlier this week. Your feedback is appreciated. > Applied, thanks. -- error compiling committee.c: too many arguments to function