From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-20.7 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,NICE_REPLY_A, SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 17C71C433E0 for ; Thu, 31 Dec 2020 03:48:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C350320799 for ; Thu, 31 Dec 2020 03:48:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726546AbgLaDsQ (ORCPT ); Wed, 30 Dec 2020 22:48:16 -0500 Received: from us-smtp-delivery-124.mimecast.com ([63.128.21.124]:27350 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726363AbgLaDsQ (ORCPT ); Wed, 30 Dec 2020 22:48:16 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1609386409; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=N5OaX6F98I/drdoA444VeQQgChUSY/jiQHwro+QYrcg=; b=gwz9Agl7YToGQXi+txwQf9xJVjuZI2Vf1U+ZX9iEDUnkclYcABJ0u+pYloV+/yMocwONTm VNk4mvuVT0CUHEmF67vdwIAibgNV59kKuSBtq5wGPprBgDEFYdfhKXOsvVQVB59Upy3Cgj GCCbqX3SZuDZ1XyBGlfb9rDeDBlh0uI= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-420-TLv5Jar4OWCXAWc8oZbAoQ-1; Wed, 30 Dec 2020 22:46:45 -0500 X-MC-Unique: TLv5Jar4OWCXAWc8oZbAoQ-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 6EB778015C6; Thu, 31 Dec 2020 03:46:44 +0000 (UTC) Received: from [10.72.12.236] (ovpn-12-236.pek2.redhat.com [10.72.12.236]) by smtp.corp.redhat.com (Postfix) with ESMTP id 976E460BE2; Thu, 31 Dec 2020 03:46:39 +0000 (UTC) Subject: Re: [RFC 2/2] KVM: add initial support for ioregionfd blocking read/write operations To: Elena Afanasova , kvm@vger.kernel.org Cc: stefanha@redhat.com, jag.raman@oracle.com, elena.ufimtseva@oracle.com References: From: Jason Wang Message-ID: <72556405-8501-26bc-4939-69e312857e91@redhat.com> Date: Thu, 31 Dec 2020 11:46:38 +0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit Content-Language: en-US X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org On 2020/12/29 下午6:02, Elena Afanasova wrote: > Signed-off-by: Elena Afanasova > --- > virt/kvm/ioregion.c | 157 ++++++++++++++++++++++++++++++++++++++++++++ > 1 file changed, 157 insertions(+) > > diff --git a/virt/kvm/ioregion.c b/virt/kvm/ioregion.c > index a200c3761343..8523f4126337 100644 > --- a/virt/kvm/ioregion.c > +++ b/virt/kvm/ioregion.c > @@ -4,6 +4,33 @@ > #include > #include "eventfd.h" > > +/* Wire protocol */ > +struct ioregionfd_cmd { > + __u32 info; > + __u32 padding; > + __u64 user_data; > + __u64 offset; > + __u64 data; > +}; > + I wonder do we need a seq in the protocol. It might be useful if we allow a pair of file descriptors to be used for multiple different ranges. Thanks > +struct ioregionfd_resp { > + __u64 data; > + __u8 pad[24]; > +};