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Re: [QEMU PATCH v4 10/13] virtio-gpu: Resource UUID
- To: Huang Rui <ray.huang@xxxxxxx>, Gerd Hoffmann <kraxel@xxxxxxxxxx>, "Michael S . Tsirkin" <mst@xxxxxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Anthony PERARD <anthony.perard@xxxxxxxxxx>, Antonio Caggiano <antonio.caggiano@xxxxxxxxxxxxx>, "Dr . David Alan Gilbert" <dgilbert@xxxxxxxxxx>, Robert Beckett <bob.beckett@xxxxxxxxxxxxx>, Dmitry Osipenko <dmitry.osipenko@xxxxxxxxxxxxx>, Alex Bennée <alex.bennee@xxxxxxxxxx>, qemu-devel@xxxxxxxxxx
- From: Akihiko Odaki <akihiko.odaki@xxxxxxxxxx>
- Date: Thu, 31 Aug 2023 19:36:57 +0900
- Cc: xen-devel@xxxxxxxxxxxxxxxxxxxx, Gurchetan Singh <gurchetansingh@xxxxxxxxxxxx>, ernunes@xxxxxxxxxx, Philippe Mathieu-Daudé <philmd@xxxxxxxxxx>, Alyssa Ross <hi@xxxxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>, Alex Deucher <alexander.deucher@xxxxxxx>, Christian König <christian.koenig@xxxxxxx>, Xenia Ragiadakou <xenia.ragiadakou@xxxxxxx>, Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@xxxxxxx>, Honglei Huang <honglei1.huang@xxxxxxx>, Julia Zhang <julia.zhang@xxxxxxx>, Chen Jiqian <Jiqian.Chen@xxxxxxx>
- Delivery-date: Thu, 31 Aug 2023 10:37:15 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 2023/08/31 18:32, Huang Rui wrote:
From: Antonio Caggiano <antonio.caggiano@xxxxxxxxxxxxx>
Enable resource UUID feature and implement command resource assign UUID.
This is done by introducing a hash table to map resource IDs to their
UUIDs.
The hash table does not seem to be stored during migration.
Signed-off-by: Antonio Caggiano <antonio.caggiano@xxxxxxxxxxxxx>
Signed-off-by: Huang Rui <ray.huang@xxxxxxx>
---
v1->v2:
- Separate declarations from code.
hw/display/trace-events | 1 +
hw/display/virtio-gpu-base.c | 2 ++
hw/display/virtio-gpu-virgl.c | 21 +++++++++++++++++
hw/display/virtio-gpu.c | 41 ++++++++++++++++++++++++++++++++++
include/hw/virtio/virtio-gpu.h | 4 ++++
5 files changed, 69 insertions(+)
diff --git a/hw/display/trace-events b/hw/display/trace-events
index 2336a0ca15..54d6894c59 100644
--- a/hw/display/trace-events
+++ b/hw/display/trace-events
@@ -41,6 +41,7 @@ virtio_gpu_cmd_res_create_blob(uint32_t res, uint64_t size) "res
0x%x, size %" P
virtio_gpu_cmd_res_unref(uint32_t res) "res 0x%x"
virtio_gpu_cmd_res_back_attach(uint32_t res) "res 0x%x"
virtio_gpu_cmd_res_back_detach(uint32_t res) "res 0x%x"
+virtio_gpu_cmd_res_assign_uuid(uint32_t res) "res 0x%x"
virtio_gpu_cmd_res_xfer_toh_2d(uint32_t res) "res 0x%x"
virtio_gpu_cmd_res_xfer_toh_3d(uint32_t res) "res 0x%x"
virtio_gpu_cmd_res_xfer_fromh_3d(uint32_t res) "res 0x%x"
diff --git a/hw/display/virtio-gpu-base.c b/hw/display/virtio-gpu-base.c
index 4f2b0ba1f3..f44388715c 100644
--- a/hw/display/virtio-gpu-base.c
+++ b/hw/display/virtio-gpu-base.c
@@ -236,6 +236,8 @@ virtio_gpu_base_get_features(VirtIODevice *vdev, uint64_t
features,
features |= (1 << VIRTIO_GPU_F_CONTEXT_INIT);
}
+ features |= (1 << VIRTIO_GPU_F_RESOURCE_UUID);
+
return features;
}
diff --git a/hw/display/virtio-gpu-virgl.c b/hw/display/virtio-gpu-virgl.c
index 17b634d4ee..1a996a08fc 100644
--- a/hw/display/virtio-gpu-virgl.c
+++ b/hw/display/virtio-gpu-virgl.c
@@ -36,6 +36,7 @@ static void virgl_cmd_create_resource_2d(VirtIOGPU *g,
{
struct virtio_gpu_resource_create_2d c2d;
struct virgl_renderer_resource_create_args args;
+ struct virtio_gpu_simple_resource *res;
VIRTIO_GPU_FILL_CMD(c2d);
trace_virtio_gpu_cmd_res_create_2d(c2d.resource_id, c2d.format,
@@ -53,6 +54,14 @@ static void virgl_cmd_create_resource_2d(VirtIOGPU *g,
args.nr_samples = 0;
args.flags = VIRTIO_GPU_RESOURCE_FLAG_Y_0_TOP;
virgl_renderer_resource_create(&args, NULL, 0);
+
+ res = g_new0(struct virtio_gpu_simple_resource, 1);
+ if (!res) {
+ cmd->error = VIRTIO_GPU_RESP_ERR_OUT_OF_MEMORY;
+ return;
virglrenderer thinks the resource is alive in such a situation.
+ }
+ res->resource_id = c2d.resource_id;
+ QTAILQ_INSERT_HEAD(&g->reslist, res, next);
}
static void virgl_cmd_create_resource_3d(VirtIOGPU *g,
@@ -60,6 +69,7 @@ static void virgl_cmd_create_resource_3d(VirtIOGPU *g,
{
struct virtio_gpu_resource_create_3d c3d;
struct virgl_renderer_resource_create_args args;
+ struct virtio_gpu_simple_resource *res;
VIRTIO_GPU_FILL_CMD(c3d);
trace_virtio_gpu_cmd_res_create_3d(c3d.resource_id, c3d.format,
@@ -77,6 +87,14 @@ static void virgl_cmd_create_resource_3d(VirtIOGPU *g,
args.nr_samples = c3d.nr_samples;
args.flags = c3d.flags;
virgl_renderer_resource_create(&args, NULL, 0);
+
+ res = g_new0(struct virtio_gpu_simple_resource, 1);
+ if (!res) {
+ cmd->error = VIRTIO_GPU_RESP_ERR_OUT_OF_MEMORY;
+ return;
+ }
+ res->resource_id = c3d.resource_id;
+ QTAILQ_INSERT_HEAD(&g->reslist, res, next);
}
static void virgl_resource_destroy(VirtIOGPU *g,
@@ -682,6 +700,9 @@ void virtio_gpu_virgl_process_cmd(VirtIOGPU *g,
/* TODO add security */
virgl_cmd_ctx_detach_resource(g, cmd);
break;
+ case VIRTIO_GPU_CMD_RESOURCE_ASSIGN_UUID:
+ virtio_gpu_resource_assign_uuid(g, cmd);
+ break;
case VIRTIO_GPU_CMD_GET_CAPSET_INFO:
virgl_cmd_get_capset_info(g, cmd);
break;
diff --git a/hw/display/virtio-gpu.c b/hw/display/virtio-gpu.c
index cc4c1f81bb..770e4747e3 100644
--- a/hw/display/virtio-gpu.c
+++ b/hw/display/virtio-gpu.c
@@ -966,6 +966,37 @@ virtio_gpu_resource_detach_backing(VirtIOGPU *g,
virtio_gpu_cleanup_mapping(g, res);
}
+void virtio_gpu_resource_assign_uuid(VirtIOGPU *g,
+ struct virtio_gpu_ctrl_command *cmd)
+{
+ struct virtio_gpu_simple_resource *res;
+ struct virtio_gpu_resource_assign_uuid assign;
+ struct virtio_gpu_resp_resource_uuid resp;
+ QemuUUID *uuid = NULL;
This initialization is unnecessary.
+
+ VIRTIO_GPU_FILL_CMD(assign);
+ virtio_gpu_bswap_32(&assign, sizeof(assign));
+ trace_virtio_gpu_cmd_res_assign_uuid(assign.resource_id);
+
+ res = virtio_gpu_find_check_resource(g, assign.resource_id, false, __func__,
&cmd->error);
+ if (!res) {
+ return;
+ }
+
+ memset(&resp, 0, sizeof(resp));
+ resp.hdr.type = VIRTIO_GPU_RESP_OK_RESOURCE_UUID;
+
+ uuid = g_hash_table_lookup(g->resource_uuids,
GUINT_TO_POINTER(assign.resource_id));
+ if (!uuid) {
+ uuid = g_new(QemuUUID, 1);
+ qemu_uuid_generate(uuid);
+ g_hash_table_insert(g->resource_uuids,
GUINT_TO_POINTER(assign.resource_id), uuid);
+ }
+
+ memcpy(resp.uuid, uuid, sizeof(QemuUUID));
+ virtio_gpu_ctrl_response(g, cmd, &resp.hdr, sizeof(resp));
+}
+
void virtio_gpu_simple_process_cmd(VirtIOGPU *g,
struct virtio_gpu_ctrl_command *cmd)
{
@@ -1014,6 +1045,9 @@ 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_RESOURCE_ASSIGN_UUID:
+ virtio_gpu_resource_assign_uuid(g, cmd);
+ break;
default:
cmd->error = VIRTIO_GPU_RESP_ERR_UNSPEC;
break;
@@ -1393,12 +1427,15 @@ void virtio_gpu_device_realize(DeviceState *qdev, Error
**errp)
QTAILQ_INIT(&g->reslist);
QTAILQ_INIT(&g->cmdq);
QTAILQ_INIT(&g->fenceq);
+
+ g->resource_uuids = g_hash_table_new_full(NULL, NULL, NULL, g_free);
}
static void virtio_gpu_device_unrealize(DeviceState *qdev)
{
VirtIOGPU *g = VIRTIO_GPU(qdev);
+ g_hash_table_destroy(g->resource_uuids);
g_clear_pointer(&g->ctrl_bh, qemu_bh_delete);
g_clear_pointer(&g->cursor_bh, qemu_bh_delete);
g_clear_pointer(&g->reset_bh, qemu_bh_delete);
@@ -1452,6 +1489,10 @@ void virtio_gpu_reset(VirtIODevice *vdev)
g_free(cmd);
}
+ if (g->resource_uuids) {
Isn't g->resource_uuids always non-NULL?
+ g_hash_table_remove_all(g->resource_uuids);
+ }
+
virtio_gpu_base_reset(VIRTIO_GPU_BASE(vdev));
}
diff --git a/include/hw/virtio/virtio-gpu.h b/include/hw/virtio/virtio-gpu.h
index b9adc28071..aa94b1b697 100644
--- a/include/hw/virtio/virtio-gpu.h
+++ b/include/hw/virtio/virtio-gpu.h
@@ -208,6 +208,8 @@ struct VirtIOGPU {
QTAILQ_HEAD(, VGPUDMABuf) bufs;
VGPUDMABuf *primary[VIRTIO_GPU_MAX_SCANOUTS];
} dmabuf;
+
+ GHashTable *resource_uuids;
};
struct VirtIOGPUClass {
@@ -285,6 +287,8 @@ void virtio_gpu_cleanup_mapping_iov(VirtIOGPU *g,
struct iovec *iov, uint32_t count);
void virtio_gpu_cleanup_mapping(VirtIOGPU *g,
struct virtio_gpu_simple_resource *res);
+void virtio_gpu_resource_assign_uuid(VirtIOGPU *g,
+ struct virtio_gpu_ctrl_command *cmd);
void virtio_gpu_process_cmdq(VirtIOGPU *g);
void virtio_gpu_device_realize(DeviceState *qdev, Error **errp);
void virtio_gpu_reset(VirtIODevice *vdev);
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