From mboxrd@z Thu Jan 1 00:00:00 1970 From: Pavel Fedin Subject: RE: [PATCH v5 2/2] KVM: Make KVM_CAP_IRQFD dependent on KVM_CAP_IRQCHIP Date: Mon, 30 Nov 2015 17:45:18 +0300 Message-ID: <019e01d12b7d$bc084520$3418cf60$@samsung.com> References: <57888eef1c5c21337ddad384250bc5f55829ac67.1448874023.git.p.fedin@samsung.com> <20151130122627.12ceb244.cornelia.huck@de.ibm.com> <017101d12b66$2c8cf970$85a6ec50$@samsung.com> <20151130131331.78d98df5.cornelia.huck@de.ibm.com> <017801d12b6c$6a7c2c00$3f748400$@samsung.com> <20151130153807.1a2668e5.cornelia.huck@de.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Cc: kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org, 'Marc Zyngier' , 'Christoffer Dall' , 'Gleb Natapov' , 'Paolo Bonzini' To: 'Cornelia Huck' Return-path: Received: from mailout1.w1.samsung.com ([210.118.77.11]:56933 "EHLO mailout1.w1.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754107AbbK3OpW (ORCPT ); Mon, 30 Nov 2015 09:45:22 -0500 Received: from eucpsbgm2.samsung.com (unknown [203.254.199.245]) by mailout1.w1.samsung.com (Oracle Communications Messaging Server 7.0.5.31.0 64bit (built May 5 2014)) with ESMTP id <0NYM00HJ7UBJF200@mailout1.w1.samsung.com> for kvm@vger.kernel.org; Mon, 30 Nov 2015 14:45:19 +0000 (GMT) In-reply-to: <20151130153807.1a2668e5.cornelia.huck@de.ibm.com> Content-language: ru Sender: kvm-owner@vger.kernel.org List-ID: Hello! > > b) I simply drop it as it is, because current qemu knows about the dependency and does not > try to use irqfd without irqchip, > > because there's simply no use for them. But, well, perhaps there would be an exception in > vhost, i don't remember testing it. > > Wouldn't an irqfd emulation cover vhost? Of course it would. At least it should, but perhaps will need some minor tweaks. Kind regards, Pavel Fedin Expert Engineer Samsung Electronics Research center Russia