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charset="utf-8" Add support for the USE_USERPTR blob flag in virtio-gpu to enable user pointer mapping for blob resources. This allows guest applications to use user-allocated memory for GPU resources more efficiently. Changes include: - Add VIRTIO_GPU_BLOB_FLAG_USE_USERPTR flag definition - Enhance blob resource creation to handle userptr flag properly - Remove arbitrary nr_entries limit (16384) in mapping creation - Add conditional handling for userptr vs regular blob mapping - Support guest_blob_mapped parameter for virgl renderer - Fix value check issue in virtio-gpu This enables more flexible memory management between guest and host for GPU virtualization scenarios. Signed-off-by: Honglei Huang --- hw/display/virtio-gpu.c | 7 ------- include/standard-headers/linux/virtio_gpu.h | 1 + 2 files changed, 1 insertion(+), 7 deletions(-) diff --git a/hw/display/virtio-gpu.c b/hw/display/virtio-gpu.c index 643e91ca2a..17df148920 100644 --- a/hw/display/virtio-gpu.c +++ b/hw/display/virtio-gpu.c @@ -808,13 +808,6 @@ int virtio_gpu_create_mapping_iov(VirtIOGPU *g, size_t esize, s; int e, v; =20 - if (nr_entries > 16384) { - qemu_log_mask(LOG_GUEST_ERROR, - "%s: nr_entries is too big (%d > 16384)\n", - __func__, nr_entries); - return -1; - } - esize =3D sizeof(*ents) * nr_entries; ents =3D g_malloc(esize); s =3D iov_to_buf(cmd->elem.out_sg, cmd->elem.out_num, diff --git a/include/standard-headers/linux/virtio_gpu.h b/include/standard= -headers/linux/virtio_gpu.h index 00cd3f04af..b85e781a2d 100644 --- a/include/standard-headers/linux/virtio_gpu.h +++ b/include/standard-headers/linux/virtio_gpu.h @@ -405,6 +405,7 @@ struct virtio_gpu_resource_create_blob { #define VIRTIO_GPU_BLOB_FLAG_USE_MAPPABLE 0x0001 #define VIRTIO_GPU_BLOB_FLAG_USE_SHAREABLE 0x0002 #define VIRTIO_GPU_BLOB_FLAG_USE_CROSS_DEVICE 0x0004 +#define VIRTIO_GPU_BLOB_FLAG_USE_USERPTR 0x0008 /* zero is invalid blob mem */ uint32_t blob_mem; 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charset="utf-8" This patch introduces support for the VIRTIO_GPU_F_RESOURCE_USERPTR feature in virtio-gpu implementation: - Add VIRTIO_GPU_F_RESOURCE_USERPTR feature flag definition - Implement resource_userptr property as a configurable option - Add VIRTIO_GPU_FLAG_RESOURCE_USERPTR_ENABLED configuration flag - Enable feature negotiation when resource_userptr is enabled Usage: -device virtio-gpu-gl,userptr=3Don This feature allows virtio-gpu to support user pointer resources, enhancing memory management capabilities for GPU virtualization scenarios. Signed-off-by: Honglei Huang --- hw/display/virtio-gpu-base.c | 3 +++ hw/display/virtio-gpu.c | 2 ++ include/hw/virtio/virtio-gpu.h | 3 +++ include/standard-headers/linux/virtio_gpu.h | 2 ++ 4 files changed, 10 insertions(+) diff --git a/hw/display/virtio-gpu-base.c b/hw/display/virtio-gpu-base.c index 7269477a1c..f013a4ece6 100644 --- a/hw/display/virtio-gpu-base.c +++ b/hw/display/virtio-gpu-base.c @@ -264,6 +264,9 @@ virtio_gpu_base_get_features(VirtIODevice *vdev, uint64= _t features, if (virtio_gpu_resource_uuid_enabled(g->conf)) { features |=3D (1 << VIRTIO_GPU_F_RESOURCE_UUID); } + if (virtio_gpu_resource_userptr_enabled(g->conf)) { + features |=3D (1 << VIRTIO_GPU_F_RESOURCE_USERPTR); + } =20 return features; } diff --git a/hw/display/virtio-gpu.c b/hw/display/virtio-gpu.c index 17df148920..0241b44cc8 100644 --- a/hw/display/virtio-gpu.c +++ b/hw/display/virtio-gpu.c @@ -1685,6 +1685,8 @@ static const 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("userptr", VirtIOGPU, parent_obj.conf.flags, + VIRTIO_GPU_FLAG_RESOURCE_USERPTR_ENABLED, false), DEFINE_PROP_SIZE("hostmem", VirtIOGPU, parent_obj.conf.hostmem, 0), DEFINE_PROP_UINT8("x-scanout-vmstate-version", VirtIOGPU, scanout_vmst= ate_version, 2), }; diff --git a/include/hw/virtio/virtio-gpu.h b/include/hw/virtio/virtio-gpu.h index 58e0f91fda..fe98ea0019 100644 --- a/include/hw/virtio/virtio-gpu.h +++ b/include/hw/virtio/virtio-gpu.h @@ -100,6 +100,7 @@ enum virtio_gpu_base_conf_flags { VIRTIO_GPU_FLAG_RUTABAGA_ENABLED, VIRTIO_GPU_FLAG_VENUS_ENABLED, VIRTIO_GPU_FLAG_RESOURCE_UUID_ENABLED, + VIRTIO_GPU_FLAG_RESOURCE_USERPTR_ENABLED, }; =20 #define virtio_gpu_virgl_enabled(_cfg) \ @@ -122,6 +123,8 @@ enum virtio_gpu_base_conf_flags { (_cfg.hostmem > 0) #define virtio_gpu_venus_enabled(_cfg) \ (_cfg.flags & (1 << VIRTIO_GPU_FLAG_VENUS_ENABLED)) +#define virtio_gpu_resource_userptr_enabled(_cfg) \ + (_cfg.flags & (1 << VIRTIO_GPU_FLAG_RESOURCE_USERPTR_ENABLED)) =20 struct virtio_gpu_base_conf { uint32_t max_outputs; diff --git a/include/standard-headers/linux/virtio_gpu.h b/include/standard= -headers/linux/virtio_gpu.h index b85e781a2d..fe36288fe5 100644 --- a/include/standard-headers/linux/virtio_gpu.h +++ b/include/standard-headers/linux/virtio_gpu.h @@ -65,6 +65,8 @@ */ #define VIRTIO_GPU_F_CONTEXT_INIT 4 =20 +#define VIRTIO_GPU_F_RESOURCE_USERPTR 5 + enum virtio_gpu_ctrl_type { VIRTIO_GPU_UNDEFINED =3D 0, =20 --=20 2.34.1 From nobody Sun Feb 8 22:00:44 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; 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charset="utf-8" Add support for ROCm (Radeon Open Compute) capability in virtio-gpu. This enables GPU compute workloads using AMD's ROCm platform through the virtio-gpu interface. Changes include: - Add "rocm" property to virtio-gpu-gl device - Define VIRTIO_GPU_FLAG_ROCM_ENABLED flag - Enable VIRGL_RENDERER_USE_ROCM flag when ROCm is enabled - Register VIRTIO_GPU_CAPSET_ROCM (capset 8) capability - Add virtio_gpu_rocm_enabled() helper macro This allows guests to detect and utilize ROCm capabilities through the virtio-gpu device when the feature is enabled. Signed-off-by: Honglei Huang Reviewed-by: Akihiko Odaki --- hw/display/virtio-gpu-gl.c | 2 ++ hw/display/virtio-gpu-virgl.c | 12 ++++++++++++ include/hw/virtio/virtio-gpu.h | 3 +++ include/standard-headers/linux/virtio_gpu.h | 1 + 4 files changed, 18 insertions(+) diff --git a/hw/display/virtio-gpu-gl.c b/hw/display/virtio-gpu-gl.c index b98ef2ef98..f059bcb177 100644 --- a/hw/display/virtio-gpu-gl.c +++ b/hw/display/virtio-gpu-gl.c @@ -159,6 +159,8 @@ static const Property virtio_gpu_gl_properties[] =3D { VIRTIO_GPU_FLAG_STATS_ENABLED, false), DEFINE_PROP_BIT("venus", VirtIOGPU, parent_obj.conf.flags, VIRTIO_GPU_FLAG_VENUS_ENABLED, false), + DEFINE_PROP_BIT("rocm", VirtIOGPU, parent_obj.conf.flags, + VIRTIO_GPU_FLAG_ROCM_ENABLED, false), }; =20 static void virtio_gpu_gl_device_unrealize(DeviceState *qdev) diff --git a/hw/display/virtio-gpu-virgl.c b/hw/display/virtio-gpu-virgl.c index cbfb8aca3f..5e0f465c37 100644 --- a/hw/display/virtio-gpu-virgl.c +++ b/hw/display/virtio-gpu-virgl.c @@ -1160,6 +1160,9 @@ int virtio_gpu_virgl_init(VirtIOGPU *g) if (virtio_gpu_venus_enabled(g->parent_obj.conf)) { flags |=3D VIRGL_RENDERER_VENUS | VIRGL_RENDERER_RENDER_SERVER; } + if (virtio_gpu_rocm_enabled(g->parent_obj.conf)) { + flags |=3D (VIRGL_RENDERER_USE_ROCM); + } #endif =20 ret =3D virgl_renderer_init(g, flags, &virtio_gpu_3d_cbs); @@ -1218,5 +1221,14 @@ GArray *virtio_gpu_virgl_get_capsets(VirtIOGPU *g) } } =20 + if (virtio_gpu_rocm_enabled(g->parent_obj.conf)) { + virgl_renderer_get_cap_set(VIRTIO_GPU_CAPSET_ROCM, + &capset_max_ver, + &capset_max_size); + if (capset_max_size) { + virtio_gpu_virgl_add_capset(capset_ids, VIRTIO_GPU_CAPSET_ROCM= ); + } + } + return capset_ids; } diff --git a/include/hw/virtio/virtio-gpu.h b/include/hw/virtio/virtio-gpu.h index fe98ea0019..a099c30377 100644 --- a/include/hw/virtio/virtio-gpu.h +++ b/include/hw/virtio/virtio-gpu.h @@ -101,6 +101,7 @@ enum virtio_gpu_base_conf_flags { VIRTIO_GPU_FLAG_VENUS_ENABLED, VIRTIO_GPU_FLAG_RESOURCE_UUID_ENABLED, VIRTIO_GPU_FLAG_RESOURCE_USERPTR_ENABLED, + VIRTIO_GPU_FLAG_ROCM_ENABLED, }; =20 #define virtio_gpu_virgl_enabled(_cfg) \ @@ -125,6 +126,8 @@ enum virtio_gpu_base_conf_flags { (_cfg.flags & (1 << VIRTIO_GPU_FLAG_VENUS_ENABLED)) #define virtio_gpu_resource_userptr_enabled(_cfg) \ (_cfg.flags & (1 << VIRTIO_GPU_FLAG_RESOURCE_USERPTR_ENABLED)) +#define virtio_gpu_rocm_enabled(_cfg) \ + (_cfg.flags & (1 << VIRTIO_GPU_FLAG_ROCM_ENABLED)) =20 struct virtio_gpu_base_conf { uint32_t max_outputs; diff --git a/include/standard-headers/linux/virtio_gpu.h b/include/standard= -headers/linux/virtio_gpu.h index fe36288fe5..fe6c0f5cc4 100644 --- a/include/standard-headers/linux/virtio_gpu.h +++ b/include/standard-headers/linux/virtio_gpu.h @@ -315,6 +315,7 @@ struct virtio_gpu_cmd_submit { #define VIRTIO_GPU_CAPSET_VENUS 4 #define VIRTIO_GPU_CAPSET_CROSS_DOMAIN 5 #define VIRTIO_GPU_CAPSET_DRM 6 +#define VIRTIO_GPU_CAPSET_ROCM 8 =20 /* VIRTIO_GPU_CMD_GET_CAPSET_INFO */ struct virtio_gpu_get_capset_info { --=20 2.34.1