From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:52778) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dGjfW-0004lH-O2 for qemu-devel@nongnu.org; Fri, 02 Jun 2017 06:18:59 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dGjfR-0001oj-UJ for qemu-devel@nongnu.org; Fri, 02 Jun 2017 06:18:58 -0400 Received: from mx1.redhat.com ([209.132.183.28]:48906) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1dGjfR-0001nz-OQ for qemu-devel@nongnu.org; Fri, 02 Jun 2017 06:18:53 -0400 From: Maxime Coquelin Date: Fri, 2 Jun 2017 12:18:26 +0200 Message-Id: <20170602101831.26576-1-maxime.coquelin@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Subject: [Qemu-devel] [PATCH v3 0/5] vhost-user: Specify and implement device IOTLB support List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: mst@redhat.com, peterx@redhat.com, marcandre.lureau@gmail.com, vkaplans@redhat.com, jasowang@redhat.com, wexu@redhat.com, yuanhan.liu@linux.intel.com, qemu-devel@nongnu.org, jfreiman@redhat.com Cc: Maxime Coquelin This series aims at specifying ans implementing the protocol update required to support device IOTLB with user backends. In this third non-RFC version, main change is mandating the slave to be a= ble to send IOTLB miss requests for any addresses it needs to access. It impl= ies the removal of patch 3, which is no more necessary, and the related spec update in patch 6. Also, a check is added in vhost-user init to ensure th= at the slave does not advertise VIRTIO_F_IOMMU_PLATFORM if it does not suppo= rt both VHOST_USER_PROTOCOL_F_SLAVE_REQ and VHOST_USER_PROTOCOL_F_REPLY_ACK protcol features. The slave requests channel part is re-used from Marc-Andr=C3=A9's series = submitted last year[1], with main changes from original version being request/featu= re names renaming and addition of the REPLY_ACK feature support. Regarding IOTLB protocol, one noticeable change is the IOTLB miss request reply made optionnal (i.e. only if slave requests it by setting the VHOST_USER_NEED_REPLY flag in the message header). This change provides more flexibility in the backend implementation of the feature. The protocol is very close to kernel backends, except that a new communication channel is introduced to enable the slave to send requests to the master. [1]: https://lists.gnu.org/archive/html/qemu-devel/2016-04/msg00095.html Marc-Andr=C3=A9 Lureau (2): vhost-user: add vhost_user to hold the chr vhost-user: add slave-req-fd support Maxime Coquelin (3): vhost: propagate errors in vhost_device_iotlb_miss() vhost: rework IOTLB messaging spec/vhost-user spec: Add IOMMU support docs/specs/vhost-user.txt | 116 ++++++++++++++++++++++- hw/net/vhost_net.c | 1 + hw/virtio/vhost-backend.c | 130 ++++++++++++++----------- hw/virtio/vhost-user.c | 194 ++++++++++++++++++++++++++++++++= ++++-- hw/virtio/vhost.c | 19 ++-- include/hw/virtio/vhost-backend.h | 23 +++-- include/hw/virtio/vhost.h | 2 +- 7 files changed, 404 insertions(+), 81 deletions(-) --=20 2.9.4