From patchwork Fri Feb 9 15:17:35 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Geert Uytterhoeven X-Patchwork-Id: 10209629 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 350FE60245 for ; Fri, 9 Feb 2018 17:53:56 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 23BDA2988A for ; Fri, 9 Feb 2018 17:53:56 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 1887B2995C; Fri, 9 Feb 2018 17:53:56 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 85ACD2994A for ; Fri, 9 Feb 2018 17:53:55 +0000 (UTC) Received: from localhost ([::1]:49953 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ekCry-00073F-N2 for patchwork-qemu-devel@patchwork.kernel.org; Fri, 09 Feb 2018 12:53:54 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:48368) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ekAyP-0001XP-7t for qemu-devel@nongnu.org; Fri, 09 Feb 2018 10:52:26 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ekAyM-0007hp-9J for qemu-devel@nongnu.org; Fri, 09 Feb 2018 10:52:25 -0500 Received: from newton.telenet-ops.be ([195.130.132.45]:48754) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1ekAyL-0007gu-Tt for qemu-devel@nongnu.org; Fri, 09 Feb 2018 10:52:22 -0500 Received: from laurent.telenet-ops.be (laurent.telenet-ops.be [IPv6:2a02:1800:110:4::f00:19]) by newton.telenet-ops.be (Postfix) with ESMTPS id 3zdJwl25VZzMqw9F for ; Fri, 9 Feb 2018 16:32:55 +0100 (CET) Received: from ayla.of.borg ([84.194.111.163]) by laurent.telenet-ops.be with bizsmtp id 8fHm1x02c3XaVaC01fHmCm; Fri, 09 Feb 2018 16:17:50 +0100 Received: from ramsan.of.borg ([192.168.97.29] helo=ramsan) by ayla.of.borg with esmtp (Exim 4.86_2) (envelope-from ) id 1ekAQs-0003S6-Pf; Fri, 09 Feb 2018 16:17:46 +0100 Received: from geert by ramsan with local (Exim 4.86_2) (envelope-from ) id 1ekAQs-0000lS-OZ; Fri, 09 Feb 2018 16:17:46 +0100 From: Geert Uytterhoeven To: Peter Maydell , Alex Williamson Date: Fri, 9 Feb 2018 16:17:35 +0100 Message-Id: <1518189456-2873-5-git-send-email-geert+renesas@glider.be> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1518189456-2873-1-git-send-email-geert+renesas@glider.be> References: <1518189456-2873-1-git-send-email-geert+renesas@glider.be> X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 195.130.132.45 X-Mailman-Approved-At: Fri, 09 Feb 2018 12:38:16 -0500 Subject: [Qemu-devel] [PATCH/RFC 4/5] vfio: No-IOMMU mode support X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Geert Uytterhoeven , Arnd Bergmann , Wolfram Sang , Magnus Damm , Alexander Graf , qemu-devel@nongnu.org, linux-renesas-soc@vger.kernel.org, Auger Eric , qemu-arm@nongnu.org, Laurent Pinchart , Xiao Feng Ren Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP From: Xiao Feng Ren Add qemu support for the newly introduced VFIO No-IOMMU driver. We need to add special handling for: - Group character device is /dev/vfio/noiommu-$GROUP. - No-IOMMU does not rely on a memory listener. - No IOMMU will be set for its group, so no need to call vfio_kvm_device_add_group. Signed-off-by: Xiao Feng Ren [geert: Rebase] Signed-off-by: Geert Uytterhoeven --- hw/vfio/common.c | 61 ++++++++++++++++++++++++++++++++++--------- include/hw/vfio/vfio-common.h | 2 ++ 2 files changed, 50 insertions(+), 13 deletions(-) diff --git a/hw/vfio/common.c b/hw/vfio/common.c index f895e3c3359af779..2ee94a3304202a74 100644 --- a/hw/vfio/common.c +++ b/hw/vfio/common.c @@ -1019,6 +1019,33 @@ static int vfio_connect_container(VFIOGroup *group, AddressSpace *as, container->fd = fd; QLIST_INIT(&container->giommu_list); QLIST_INIT(&container->hostwin_list); + container->noiommu = group->noiommu; + + if (container->noiommu) { + ret = ioctl(group->fd, VFIO_GROUP_SET_CONTAINER, &fd); + if (ret) { + error_report("vfio: failed to set group container: %m"); + ret = -errno; + goto free_container_exit; + } + + ret = ioctl(fd, VFIO_CHECK_EXTENSION, VFIO_NOIOMMU_IOMMU); + if (!ret) { + error_report("vfio: No available IOMMU models"); + ret = -EINVAL; + goto free_container_exit; + } + + ret = ioctl(fd, VFIO_SET_IOMMU, VFIO_NOIOMMU_IOMMU); + if (ret) { + error_report("vfio: failed to set iommu for container: %m"); + ret = -errno; + goto free_container_exit; + } + + goto listener_register; + } + if (ioctl(fd, VFIO_CHECK_EXTENSION, VFIO_TYPE1_IOMMU) || ioctl(fd, VFIO_CHECK_EXTENSION, VFIO_TYPE1v2_IOMMU)) { bool v2 = !!ioctl(fd, VFIO_CHECK_EXTENSION, VFIO_TYPE1v2_IOMMU); @@ -1151,15 +1178,16 @@ static int vfio_connect_container(VFIOGroup *group, AddressSpace *as, group->container = container; QLIST_INSERT_HEAD(&container->group_list, group, container_next); - container->listener = vfio_memory_listener; - - memory_listener_register(&container->listener, container->space->as); - - if (container->error) { - ret = container->error; - error_setg_errno(errp, -ret, - "memory listener initialization failed for container"); - goto listener_release_exit; +listener_register: + if (!container->noiommu) { + container->listener = vfio_memory_listener; + memory_listener_register(&container->listener, container->space->as); + if (container->error) { + ret = container->error; + error_setg_errno(errp, -ret, + "memory listener initialization failed for container"); + goto listener_release_exit; + } } container->initialized = true; @@ -1169,7 +1197,9 @@ listener_release_exit: QLIST_REMOVE(group, container_next); QLIST_REMOVE(container, next); vfio_kvm_device_del_group(group); - vfio_listener_release(container); + if (!container->noiommu) { + vfio_listener_release(container); + } free_container_exit: g_free(container); @@ -1195,7 +1225,7 @@ static void vfio_disconnect_container(VFIOGroup *group) * since unset may destroy the backend container if it's the last * group. */ - if (QLIST_EMPTY(&container->group_list)) { + if (QLIST_EMPTY(&container->group_list) && !container->noiommu) { vfio_listener_release(container); } @@ -1249,8 +1279,13 @@ VFIOGroup *vfio_get_group(int groupid, AddressSpace *as, Error **errp) snprintf(path, sizeof(path), "/dev/vfio/%d", groupid); group->fd = qemu_open(path, O_RDWR); if (group->fd < 0) { - error_setg_errno(errp, errno, "failed to open %s", path); - goto free_group_exit; + snprintf(path, sizeof(path), "/dev/vfio/noiommu-%d", groupid); + group->fd = qemu_open(path, O_RDWR); + if (group->fd < 0) { + error_setg_errno(errp, errno, "failed to open %s", path); + goto free_group_exit; + } + group->noiommu = 1; } if (ioctl(group->fd, VFIO_GROUP_GET_STATUS, &status)) { diff --git a/include/hw/vfio/vfio-common.h b/include/hw/vfio/vfio-common.h index f3a2ac9fee02066f..aca2e33efb9b118c 100644 --- a/include/hw/vfio/vfio-common.h +++ b/include/hw/vfio/vfio-common.h @@ -77,6 +77,7 @@ struct VFIOGroup; typedef struct VFIOContainer { VFIOAddressSpace *space; int fd; /* /dev/vfio/vfio, empowered by the attached groups */ + bool noiommu; MemoryListener listener; MemoryListener prereg_listener; unsigned iommu_type; @@ -136,6 +137,7 @@ struct VFIODeviceOps { typedef struct VFIOGroup { int fd; int groupid; + bool noiommu; VFIOContainer *container; QLIST_HEAD(, VFIODevice) device_list; QLIST_ENTRY(VFIOGroup) next;