From mboxrd@z Thu Jan 1 00:00:00 1970 From: Avi Kivity Subject: Re: [RFC PATCH 0/3] generic hypercall support Date: Thu, 07 May 2009 21:12:02 +0300 Message-ID: <4A032472.4030106@redhat.com> References: <20090505132005.19891.78436.stgit@dev.haskins.net> <4A0040C0.1080102@redhat.com> <4A0041BA.6060106@novell.com> <4A004676.4050604@redhat.com> <4A0049CD.3080003@gmail.com> <20090505231718.GT3036@sequoia.sous-sol.org> <4A010927.6020207@novell.com> <20090506072212.GV3036@sequoia.sous-sol.org> <4A018DF2.6010301@novell.com> <20090506160712.GW3036@sequoia.sous-sol.org> <4A031471.7000406@novell.com> <4A0322F1.2000905@redhat.com> <4A032390.6030100@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: Gregory Haskins , Chris Wright , linux-kernel@vger.kernel.org, kvm@vger.kernel.org, Anthony Liguori To: Gregory Haskins Return-path: Received: from mx2.redhat.com ([66.187.237.31]:47843 "EHLO mx2.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1760985AbZEGSM6 (ORCPT ); Thu, 7 May 2009 14:12:58 -0400 In-Reply-To: <4A032390.6030100@gmail.com> Sender: kvm-owner@vger.kernel.org List-ID: Gregory Haskins wrote: >> What do you think of my mmio hypercall? That will speed up all mmio >> to be as fast as a hypercall, and then we can use ordinary mmio/pio >> writes to trigger things. >> >> > I like it! > > Bigger question is what kind of work goes into making mmio a pv_op (or > is this already done)? > > Looks like it isn't there. But it isn't any different than set_pte - convert a write into a hypercall. -- I have a truly marvellous patch that fixes the bug which this signature is too narrow to contain.