From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Michael S. Tsirkin" Subject: Re: [PATCH RFC 1/3] vmx: allow ioeventfd for EPT violations Date: Mon, 31 Aug 2015 17:57:05 +0300 Message-ID: <20150831175300-mutt-send-email-mst@redhat.com> References: <1440925898-23440-1-git-send-email-mst@redhat.com> <1440925898-23440-2-git-send-email-mst@redhat.com> <55E3C1C6.7030603@linux.intel.com> <20150831102944-mutt-send-email-mst@redhat.com> <55E41134.3050103@linux.intel.com> <20150831141932-mutt-send-email-mst@redhat.com> <55E45541.5010206@linux.intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: linux-kernel@vger.kernel.org, kvm@vger.kernel.org, Paolo Bonzini To: Xiao Guangrong Return-path: Content-Disposition: inline In-Reply-To: <55E45541.5010206@linux.intel.com> Sender: linux-kernel-owner@vger.kernel.org List-Id: kvm.vger.kernel.org On Mon, Aug 31, 2015 at 09:23:13PM +0800, Xiao Guangrong wrote: > I have another question, the eventfd memory is never read by guest and it's always > a write MMIO VM-exit, why you build it on RO memslot? Why not just use normal MMIO page > instead? We do that at the moment, that's slower than PIO. -- MST