From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Michael S. Tsirkin" Subject: Re: [PATCH 0/4 v9] MSI-X MMIO support for KVM Date: Tue, 6 Sep 2011 11:12:48 +0300 Message-ID: <20110906081247.GE13286@redhat.com> References: <1298019193-12742-1-git-send-email-sheng@linux.intel.com> <20110222180858.GA5784@amt.cnet> <4E5F6C20.7020701@siemens.com> <4E65D149.1070807@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Jan Kiszka , Marcelo Tosatti , kvm@vger.kernel.org, Alex Williamson To: Avi Kivity Return-path: Received: from mx1.redhat.com ([209.132.183.28]:32328 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753455Ab1IFILy (ORCPT ); Tue, 6 Sep 2011 04:11:54 -0400 Content-Disposition: inline In-Reply-To: <4E65D149.1070807@redhat.com> Sender: kvm-owner@vger.kernel.org List-ID: On Tue, Sep 06, 2011 at 10:52:41AM +0300, Avi Kivity wrote: > > > >BTW, the same is also true for that optional per-vector masking of > >legacy MSI. Are there devices in the field that actually support this? I > >haven't found one so far and tend to consider this feature not worth > >implementing. > > Don't know. I don't like implementing features on the basis of bug > reports, though. On the other hand we can't really test it without > a real device. Linux will use this capability if present. So we could add support for an emulated device (e.g. e1000), then test with nested virt once iommu emulation lands :) -- MST