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David Alan Gilbert" , Alex Deucher , Christian Koenig , Stewart Hildebrand , Xenia Ragiadakou , Honglei Huang , Julia Zhang , Huang Rui , Jiqian Chen Subject: [QEMU PATCH v4 1/1] virtgpu: do not destroy resources when guest suspend Date: Thu, 20 Jul 2023 20:08:16 +0800 Message-ID: <20230720120816.8751-2-Jiqian.Chen@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230720120816.8751-1-Jiqian.Chen@amd.com> References: <20230720120816.8751-1-Jiqian.Chen@amd.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Originating-IP: [10.180.168.240] X-ClientProxiedBy: SATLEXMB03.amd.com (10.181.40.144) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CO1NAM11FT108:EE_|SJ0PR12MB6759:EE_ X-MS-Office365-Filtering-Correlation-Id: 3979add2-85d1-4123-2c6d-08db891a0ec0 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:CAL;SFV:NSPM;H:SATLEXMB04.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230028)(4636009)(39860400002)(136003)(346002)(376002)(396003)(451199021)(82310400008)(46966006)(36840700001)(40470700004)(40480700001)(356005)(82740400003)(86362001)(81166007)(36756003)(47076005)(2906002)(426003)(8936002)(478600001)(8676002)(7416002)(2616005)(36860700001)(40460700003)(83380400001)(5660300002)(6666004)(7696005)(16526019)(15650500001)(1076003)(186003)(26005)(336012)(54906003)(316002)(4326008)(110136005)(70206006)(70586007)(41300700001)(36900700001);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 20 Jul 2023 12:08:41.1281 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 3979add2-85d1-4123-2c6d-08db891a0ec0 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: CO1NAM11FT108.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SJ0PR12MB6759 X-ZohoMail-DKIM: pass (identity @amd.com) X-ZM-MESSAGEID: 1689854952137100001 Content-Type: text/plain; charset="utf-8" After suspending and resuming guest VM, you will get a black screen, and the display can't come back. This is because when guest did suspending, it called into qemu to call virtio_gpu_gl_reset. In function virtio_gpu_gl_reset, it destroyed resources and reset renderer, which were used for display. As a result, guest's screen can't come back to the time when it was suspended and only showed black. So, this patch adds a new ctrl message VIRTIO_GPU_CMD_SET_FREEZE_MODE to get notifications from guest. If guest is during suspending, it sets freeze mode of virtgpu to freeze_S3, this will prevent destroying resources and resetting renderer when guest calls into virtio_gpu_gl_reset. If guest is during resuming, it sets freeze mode to unfreeze, and then virtio_gpu_gl_reset will keep its origin actions and has no other impaction. Due to this implemention needs cooperation with guest, so it added a new feature flag VIRTIO_GPU_F_FREEZE_S3, so that guest and host can negotiate whenever freeze_S3 is supported or not. Signed-off-by: Jiqian Chen --- hw/display/virtio-gpu-base.c | 3 ++ hw/display/virtio-gpu-gl.c | 10 ++++++- hw/display/virtio-gpu-virgl.c | 7 +++++ hw/display/virtio-gpu.c | 55 ++++++++++++++++++++++++++++++++-- hw/virtio/virtio.c | 3 ++ include/hw/virtio/virtio-gpu.h | 6 ++++ 6 files changed, 81 insertions(+), 3 deletions(-) diff --git a/hw/display/virtio-gpu-base.c b/hw/display/virtio-gpu-base.c index a29f191aa8..40ae4f9678 100644 --- a/hw/display/virtio-gpu-base.c +++ b/hw/display/virtio-gpu-base.c @@ -215,6 +215,9 @@ virtio_gpu_base_get_features(VirtIODevice *vdev, uint64= _t features, if (virtio_gpu_blob_enabled(g->conf)) { features |=3D (1 << VIRTIO_GPU_F_RESOURCE_BLOB); } + if (virtio_gpu_freeze_S3_enabled(g->conf)) { + features |=3D (1 << VIRTIO_GPU_F_FREEZE_S3); + } =20 return features; } diff --git a/hw/display/virtio-gpu-gl.c b/hw/display/virtio-gpu-gl.c index e06be60dfb..cb418dae9a 100644 --- a/hw/display/virtio-gpu-gl.c +++ b/hw/display/virtio-gpu-gl.c @@ -100,7 +100,15 @@ static void virtio_gpu_gl_reset(VirtIODevice *vdev) */ if (gl->renderer_inited && !gl->renderer_reset) { virtio_gpu_virgl_reset_scanout(g); - gl->renderer_reset =3D true; + /* + * If guest is suspending, we shouldn't reset renderer, + * otherwise, the display can't come back to the time when + * it was suspended after guest was resumed. + */ + if (!virtio_gpu_freeze_S3_enabled(g->parent_obj.conf) || + g->freeze_mode =3D=3D VIRTIO_GPU_FREEZE_MODE_UNFREEZE) { + gl->renderer_reset =3D true; + } } } =20 diff --git a/hw/display/virtio-gpu-virgl.c b/hw/display/virtio-gpu-virgl.c index 73cb92c8d5..fc1971be70 100644 --- a/hw/display/virtio-gpu-virgl.c +++ b/hw/display/virtio-gpu-virgl.c @@ -464,6 +464,13 @@ void virtio_gpu_virgl_process_cmd(VirtIOGPU *g, case VIRTIO_GPU_CMD_GET_EDID: virtio_gpu_get_edid(g, cmd); break; + case VIRTIO_GPU_CMD_SET_FREEZE_MODE: + if (virtio_gpu_freeze_S3_enabled(g->parent_obj.conf)) { + virtio_gpu_cmd_set_freeze_mode(g, cmd); + } else { + cmd->error =3D VIRTIO_GPU_RESP_ERR_INVALID_PARAMETER; + } + break; default: cmd->error =3D VIRTIO_GPU_RESP_ERR_UNSPEC; break; diff --git a/hw/display/virtio-gpu.c b/hw/display/virtio-gpu.c index 5e15c79b94..dcf83379a8 100644 --- a/hw/display/virtio-gpu.c +++ b/hw/display/virtio-gpu.c @@ -373,6 +373,16 @@ static void virtio_gpu_resource_create_blob(VirtIOGPU = *g, QTAILQ_INSERT_HEAD(&g->reslist, res, next); } =20 +void virtio_gpu_cmd_set_freeze_mode(VirtIOGPU *g, + struct virtio_gpu_ctrl_command *cmd) +{ + struct virtio_gpu_set_freeze_mode sf; + + VIRTIO_GPU_FILL_CMD(sf); + virtio_gpu_bswap_32(&sf, sizeof(sf)); + g->freeze_mode =3D sf.freeze_mode; +} + static void virtio_gpu_disable_scanout(VirtIOGPU *g, int scanout_id) { struct virtio_gpu_scanout *scanout =3D &g->parent_obj.scanout[scanout_= id]; @@ -986,6 +996,13 @@ void virtio_gpu_simple_process_cmd(VirtIOGPU *g, case VIRTIO_GPU_CMD_RESOURCE_DETACH_BACKING: virtio_gpu_resource_detach_backing(g, cmd); break; + case VIRTIO_GPU_CMD_SET_FREEZE_MODE: + if (virtio_gpu_freeze_S3_enabled(g->parent_obj.conf)) { + virtio_gpu_cmd_set_freeze_mode(g, cmd); + } else { + cmd->error =3D VIRTIO_GPU_RESP_ERR_INVALID_PARAMETER; + } + break; default: cmd->error =3D VIRTIO_GPU_RESP_ERR_UNSPEC; break; @@ -1344,6 +1361,29 @@ void virtio_gpu_device_realize(DeviceState *qdev, Er= ror **errp) QTAILQ_INIT(&g->reslist); QTAILQ_INIT(&g->cmdq); QTAILQ_INIT(&g->fenceq); + + g->freeze_mode =3D VIRTIO_GPU_FREEZE_MODE_UNFREEZE; +} + +static void virtio_gpu_device_unrealize(DeviceState *qdev) +{ + VirtIOGPU *g =3D VIRTIO_GPU(qdev); + struct virtio_gpu_simple_resource *res, *tmp; + + /* + * This is to prevent memory leak in the situation that qemu is + * destroyed when guest is suspended. This also need hot-plug + * support. + */ + if (virtio_gpu_freeze_S3_enabled(g->parent_obj.conf) && + g->freeze_mode =3D=3D VIRTIO_GPU_FREEZE_MODE_FREEZE_S3) { + QTAILQ_FOREACH_SAFE(res, &g->reslist, next, tmp) { + virtio_gpu_resource_destroy(g, res); + } + virtio_gpu_virgl_reset(g); + g->freeze_mode =3D VIRTIO_GPU_FREEZE_MODE_UNFREEZE; + } + } =20 void virtio_gpu_reset(VirtIODevice *vdev) @@ -1352,8 +1392,16 @@ void virtio_gpu_reset(VirtIODevice *vdev) struct virtio_gpu_simple_resource *res, *tmp; struct virtio_gpu_ctrl_command *cmd; =20 - QTAILQ_FOREACH_SAFE(res, &g->reslist, next, tmp) { - virtio_gpu_resource_destroy(g, res); + /* + * If guest is suspending, we shouldn't destroy resources, + * otherwise, the display can't come back to the time when + * it was suspended after guest was resumed. + */ + if (!virtio_gpu_freeze_S3_enabled(g->parent_obj.conf) || + g->freeze_mode =3D=3D VIRTIO_GPU_FREEZE_MODE_UNFREEZE) { + QTAILQ_FOREACH_SAFE(res, &g->reslist, next, tmp) { + virtio_gpu_resource_destroy(g, res); + } } =20 while (!QTAILQ_EMPTY(&g->cmdq)) { @@ -1425,6 +1473,8 @@ static Property virtio_gpu_properties[] =3D { 256 * MiB), DEFINE_PROP_BIT("blob", VirtIOGPU, parent_obj.conf.flags, VIRTIO_GPU_FLAG_BLOB_ENABLED, false), + DEFINE_PROP_BIT("freeze_S3", VirtIOGPU, parent_obj.conf.flags, + VIRTIO_GPU_FLAG_FREEZE_S3_ENABLED, false), DEFINE_PROP_END_OF_LIST(), }; =20 @@ -1441,6 +1491,7 @@ static void virtio_gpu_class_init(ObjectClass *klass,= void *data) vgbc->gl_flushed =3D virtio_gpu_handle_gl_flushed; =20 vdc->realize =3D virtio_gpu_device_realize; + vdc->unrealize =3D virtio_gpu_device_unrealize; vdc->reset =3D virtio_gpu_reset; vdc->get_config =3D virtio_gpu_get_config; vdc->set_config =3D virtio_gpu_set_config; diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c index eb6347ab5d..2a3c54f2c4 100644 --- a/hw/virtio/virtio.c +++ b/hw/virtio/virtio.c @@ -240,6 +240,9 @@ qmp_virtio_feature_map_t virtio_gpu_feature_map[] =3D { FEATURE_ENTRY(VIRTIO_GPU_F_CONTEXT_INIT, \ "VIRTIO_GPU_F_CONTEXT_INIT: Context types and synchronization " "timelines supported"), + FEATURE_ENTRY(VIRTIO_GPU_F_FREEZE_S3, \ + "VIRTIO_GPU_F_FREEZE_S3: Freezing virtio-gpu and keeping resou= rces" + "alive is supported."), FEATURE_ENTRY(VHOST_F_LOG_ALL, \ "VHOST_F_LOG_ALL: Logging write descriptors supported"), FEATURE_ENTRY(VHOST_USER_F_PROTOCOL_FEATURES, \ diff --git a/include/hw/virtio/virtio-gpu.h b/include/hw/virtio/virtio-gpu.h index 2e28507efe..141c48080f 100644 --- a/include/hw/virtio/virtio-gpu.h +++ b/include/hw/virtio/virtio-gpu.h @@ -90,6 +90,7 @@ enum virtio_gpu_base_conf_flags { VIRTIO_GPU_FLAG_EDID_ENABLED, VIRTIO_GPU_FLAG_DMABUF_ENABLED, VIRTIO_GPU_FLAG_BLOB_ENABLED, + VIRTIO_GPU_FLAG_FREEZE_S3_ENABLED, }; =20 #define virtio_gpu_virgl_enabled(_cfg) \ @@ -102,6 +103,8 @@ enum virtio_gpu_base_conf_flags { (_cfg.flags & (1 << VIRTIO_GPU_FLAG_DMABUF_ENABLED)) #define virtio_gpu_blob_enabled(_cfg) \ (_cfg.flags & (1 << VIRTIO_GPU_FLAG_BLOB_ENABLED)) +#define virtio_gpu_freeze_S3_enabled(_cfg) \ + (_cfg.flags & (1 << VIRTIO_GPU_FLAG_FREEZE_S3_ENABLED)) =20 struct virtio_gpu_base_conf { uint32_t max_outputs; @@ -173,6 +176,7 @@ struct VirtIOGPU { =20 uint64_t hostmem; =20 + virtio_gpu_freeze_mode_t freeze_mode; bool processing_cmdq; QEMUTimer *fence_poll; QEMUTimer *print_stats; @@ -284,5 +288,7 @@ void virtio_gpu_virgl_reset_scanout(VirtIOGPU *g); void virtio_gpu_virgl_reset(VirtIOGPU *g); int virtio_gpu_virgl_init(VirtIOGPU *g); int virtio_gpu_virgl_get_num_capsets(VirtIOGPU *g); +void virtio_gpu_cmd_set_freeze_mode(VirtIOGPU *g, + struct virtio_gpu_ctrl_command *cmd); =20 #endif --=20 2.34.1