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[83.42.66.234]) by smtp.gmail.com with ESMTPSA id a128sm1798644wmf.5.2020.11.11.01.23.42 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 11 Nov 2020 01:23:43 -0800 (PST) Subject: Re: [PATCH 3/3] configure: mark vhost-user Linux-only To: Stefan Hajnoczi , qemu-devel@nongnu.org References: <20201110171121.1265142-1-stefanha@redhat.com> <20201110171121.1265142-4-stefanha@redhat.com> From: =?UTF-8?Q?Philippe_Mathieu-Daud=c3=a9?= Message-ID: Date: Wed, 11 Nov 2020 10:23:42 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.4.0 MIME-Version: 1.0 In-Reply-To: <20201110171121.1265142-4-stefanha@redhat.com> Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=philmd@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=63.128.21.124; envelope-from=philmd@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/11/11 01:42:46 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, NICE_REPLY_A=-0.001, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Kevin Wolf , Thomas Huth , qemu-block@nongnu.org, "Michael S. Tsirkin" , Max Reitz , =?UTF-8?Q?Alex_Benn=c3=a9e?= Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On 11/10/20 6:11 PM, Stefan Hajnoczi wrote: > The vhost-user protocol uses the Linux eventfd feature and is typically > connected to Linux kvm.ko ioeventfd and irqfd file descriptors. The > protocol specification in docs/interop/vhost-user.rst does not describe > how platforms without eventfd support work. > > The QEMU vhost-user devices compile on other POSIX host operating > systems because eventfd usage is abstracted in QEMU. The libvhost-user > programs in contrib/ do not compile but we failed to notice since they > are not built by default. > > Make it clear that vhost-user is only supported on Linux for the time > being. If someone wishes to support it on other platforms then the > details can be added to vhost-user.rst and CI jobs can test the feature > to prevent bitrot. > > Signed-off-by: Stefan Hajnoczi > --- > configure | 9 ++++----- > 1 file changed, 4 insertions(+), 5 deletions(-) Reviewed-by: Philippe Mathieu-Daudé Tested-by: Philippe Mathieu-Daudé