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Tsirkin" , =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= Subject: [PATCH 2/2] virtio-gpu: fix scanout migration post-load Date: Mon, 15 Jan 2024 19:48:30 +0400 Message-ID: <20240115154830.498304-3-marcandre.lureau@redhat.com> In-Reply-To: <20240115154830.498304-1-marcandre.lureau@redhat.com> References: <20240115154830.498304-1-marcandre.lureau@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.6 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=170.10.129.124; envelope-from=marcandre.lureau@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -35 X-Spam_score: -3.6 X-Spam_bar: --- X-Spam_report: (-3.6 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1.531, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1705333777174100001 From: Marc-Andr=C3=A9 Lureau The current post-loading code for scanout has a FIXME: it doesn't take the resource region/rect into account. But there is more, when adding blob migration support in commit f66767f75c9, I didn't realize that blob resources could be used for scanouts. This situationn leads to a crash during post-load, as they don't have an associated res->image. virtio_gpu_do_set_scanout() handle all cases, but requires the associated virtio_gpu_framebuffer, which is currently not saved during migration. Add a v2 of "virtio-gpu-one-scanout" with the framebuffer fields, so we can restore blob scanouts, as well as fixing the existing FIXME. Signed-off-by: Marc-Andr=C3=A9 Lureau Reviewed-by: Sebastian Ott --- include/hw/virtio/virtio-gpu.h | 1 + hw/display/virtio-gpu.c | 57 ++++++++++++++++++++++++++-------- 2 files changed, 45 insertions(+), 13 deletions(-) diff --git a/include/hw/virtio/virtio-gpu.h b/include/hw/virtio/virtio-gpu.h index 584ba2ed73..9a13afb34e 100644 --- a/include/hw/virtio/virtio-gpu.h +++ b/include/hw/virtio/virtio-gpu.h @@ -81,6 +81,7 @@ struct virtio_gpu_scanout { uint32_t resource_id; struct virtio_gpu_update_cursor cursor; QEMUCursor *current_cursor; + struct virtio_gpu_framebuffer fb; }; =20 struct virtio_gpu_requested_state { diff --git a/hw/display/virtio-gpu.c b/hw/display/virtio-gpu.c index a62ffb1627..05c30f30b6 100644 --- a/hw/display/virtio-gpu.c +++ b/hw/display/virtio-gpu.c @@ -595,6 +595,7 @@ static void virtio_unref_resource(pixman_image_t *image= , void *data) static void virtio_gpu_update_scanout(VirtIOGPU *g, uint32_t scanout_id, struct virtio_gpu_simple_resource *r= es, + struct virtio_gpu_framebuffer *fb, struct virtio_gpu_rect *r) { struct virtio_gpu_simple_resource *ores; @@ -612,9 +613,10 @@ static void virtio_gpu_update_scanout(VirtIOGPU *g, scanout->y =3D r->y; scanout->width =3D r->width; scanout->height =3D r->height; + scanout->fb =3D *fb; } =20 -static void virtio_gpu_do_set_scanout(VirtIOGPU *g, +static bool virtio_gpu_do_set_scanout(VirtIOGPU *g, uint32_t scanout_id, struct virtio_gpu_framebuffer *fb, struct virtio_gpu_simple_resource *r= es, @@ -640,7 +642,7 @@ static void virtio_gpu_do_set_scanout(VirtIOGPU *g, r->x, r->y, r->width, r->height, fb->width, fb->height); *error =3D VIRTIO_GPU_RESP_ERR_INVALID_PARAMETER; - return; + return false; } =20 g->parent_obj.enable =3D 1; @@ -648,11 +650,12 @@ static void virtio_gpu_do_set_scanout(VirtIOGPU *g, if (res->blob) { if (console_has_gl(scanout->con)) { if (!virtio_gpu_update_dmabuf(g, scanout_id, res, fb, r)) { - virtio_gpu_update_scanout(g, scanout_id, res, r); + virtio_gpu_update_scanout(g, scanout_id, res, fb, r); } else { *error =3D VIRTIO_GPU_RESP_ERR_OUT_OF_MEMORY; + return false; } - return; + return true; } =20 data =3D res->blob; @@ -688,7 +691,8 @@ static void virtio_gpu_do_set_scanout(VirtIOGPU *g, scanout->ds); } =20 - virtio_gpu_update_scanout(g, scanout_id, res, r); + virtio_gpu_update_scanout(g, scanout_id, res, fb, r); + return true; } =20 static void virtio_gpu_set_scanout(VirtIOGPU *g, @@ -1159,7 +1163,8 @@ static void virtio_gpu_cursor_bh(void *opaque) =20 static const VMStateDescription vmstate_virtio_gpu_scanout =3D { .name =3D "virtio-gpu-one-scanout", - .version_id =3D 1, + .version_id =3D 2, + .minimum_version_id =3D 1, .fields =3D (const VMStateField[]) { VMSTATE_UINT32(resource_id, struct virtio_gpu_scanout), VMSTATE_UINT32(width, struct virtio_gpu_scanout), @@ -1171,6 +1176,12 @@ static const VMStateDescription vmstate_virtio_gpu_s= canout =3D { VMSTATE_UINT32(cursor.hot_y, struct virtio_gpu_scanout), VMSTATE_UINT32(cursor.pos.x, struct virtio_gpu_scanout), VMSTATE_UINT32(cursor.pos.y, struct virtio_gpu_scanout), + VMSTATE_UINT32_V(fb.format, struct virtio_gpu_scanout, 2), + VMSTATE_UINT32_V(fb.bytes_pp, struct virtio_gpu_scanout, 2), + VMSTATE_UINT32_V(fb.width, struct virtio_gpu_scanout, 2), + VMSTATE_UINT32_V(fb.height, struct virtio_gpu_scanout, 2), + VMSTATE_UINT32_V(fb.stride, struct virtio_gpu_scanout, 2), + VMSTATE_UINT32_V(fb.offset, struct virtio_gpu_scanout, 2), VMSTATE_END_OF_LIST() }, }; @@ -1342,6 +1353,7 @@ static int virtio_gpu_blob_save(QEMUFile *f, void *op= aque, size_t size, if (!res->blob_size) { continue; } + assert(!res->image); qemu_put_be32(f, res->resource_id); qemu_put_be32(f, res->blob_size); qemu_put_be32(f, res->iov_cnt); @@ -1404,24 +1416,43 @@ static int virtio_gpu_post_load(void *opaque, int v= ersion_id) int i; =20 for (i =3D 0; i < g->parent_obj.conf.max_outputs; i++) { - /* FIXME: should take scanout.r.{x,y} into account */ scanout =3D &g->parent_obj.scanout[i]; if (!scanout->resource_id) { continue; } + res =3D virtio_gpu_find_resource(g, scanout->resource_id); if (!res) { return -EINVAL; } - scanout->ds =3D qemu_create_displaysurface_pixman(res->image); - if (!scanout->ds) { - return -EINVAL; - } + + if (scanout->fb.format !=3D 0) { + uint32_t error =3D 0; + struct virtio_gpu_rect r =3D { + .x =3D scanout->x, + .y =3D scanout->y, + .width =3D scanout->width, + .height =3D scanout->height + }; + + if (!virtio_gpu_do_set_scanout(g, i, &scanout->fb, res, &r, &e= rror)) { + return -EINVAL; + } + } else { + /* legacy v1 migration support */ + if (!res->image) { + return -EINVAL; + } + scanout->ds =3D qemu_create_displaysurface_pixman(res->image); + if (!scanout->ds) { + return -EINVAL; + } #ifdef WIN32 - qemu_displaysurface_win32_set_handle(scanout->ds, res->handle, 0); + qemu_displaysurface_win32_set_handle(scanout->ds, res->handle,= 0); #endif + dpy_gfx_replace_surface(scanout->con, scanout->ds); + } =20 - dpy_gfx_replace_surface(scanout->con, scanout->ds); dpy_gfx_update_full(scanout->con); if (scanout->cursor.resource_id) { update_cursor(g, &scanout->cursor); --=20 2.43.0