From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Michael S. Tsirkin" Subject: Re: [KVM PATCH v3 2/2] kvm: add support for irqfd via eventfd-notification interface Date: Sun, 3 May 2009 22:25:07 +0300 Message-ID: <20090503192507.GA15780@redhat.com> References: <20090427182540.6646.96740.stgit@dev.haskins.net> <20090427183334.6646.90800.stgit@dev.haskins.net> <20090430130708.GA13763@redhat.com> <49FDCD7C.7070605@redhat.com> <20090503190427.GB14483@redhat.com> <49FDEDBC.2090306@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Gregory Haskins , kvm@vger.kernel.org, linux-kernel@vger.kernel.org, davidel@xmailserver.org To: Avi Kivity Return-path: Received: from mx2.redhat.com ([66.187.237.31]:41241 "EHLO mx2.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755108AbZECT0H (ORCPT ); Sun, 3 May 2009 15:26:07 -0400 Content-Disposition: inline In-Reply-To: <49FDEDBC.2090306@redhat.com> Sender: kvm-owner@vger.kernel.org List-ID: On Sun, May 03, 2009 at 10:17:16PM +0300, Avi Kivity wrote: >> Actually there's a third option: add KVM_MASK_IRQ, KVM_UNMASK_IRQ ioctls >> which will block/unblock guest from getting interrupt on this irq, >> whatever the source. Interrupts are queued in kernel while masked. A >> third ioctl KVM_PENDING_IRQS will return the status for a set if IRQs. >> qemu would call these ioctls when guest edits the MSIX vector control or >> reads the pending bit array. >> > > I think this is the best option. Sounds good. -- MST