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Tsirkin" , Stefano Garzarella , Koushik Dutta , Fabiano Rosas , Jason Wang , Laurent Vivier Subject: [RFC PATCH 6/8] tests: vhost-vdpa: test out-of-order descriptor completion Date: Thu, 5 Mar 2026 17:39:36 +0100 Message-ID: <20260305163938.3200787-7-eperezma@redhat.com> In-Reply-To: <20260305163938.3200787-1-eperezma@redhat.com> References: <20260305163938.3200787-1-eperezma@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.0 on 10.30.177.12 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=170.10.133.124; envelope-from=eperezma@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -5 X-Spam_score: -0.6 X-Spam_bar: / X-Spam_report: (-0.6 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, 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_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.892, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.622, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: qemu development 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: 1772728890662158500 Add tests that submit descriptors in one order but complete them in a different order: - Submit desc1 then desc2, complete desc2 then desc1 - Same pattern with 2-descriptor chains This verifies SVQ correctly handles devices that don't preserve submission order in completions. Signed-off-by: Eugenio P=C3=A9rez --- tests/qtest/vhost-vdpa-test.c | 20 +++++++++++++++++++- 1 file changed, 19 insertions(+), 1 deletion(-) diff --git a/tests/qtest/vhost-vdpa-test.c b/tests/qtest/vhost-vdpa-test.c index 433e5d71ca7a..5efe688673cb 100644 --- a/tests/qtest/vhost-vdpa-test.c +++ b/tests/qtest/vhost-vdpa-test.c @@ -571,7 +571,7 @@ static void vhost_vdpa_tx_test(void *obj, void *arg, QG= uestAllocator *alloc) { TestServer *server =3D arg; QVirtioNet *net =3D obj; - uint32_t free_head; + uint32_t free_head, free_head2; =20 /* Add some rx packets so SVQ must clean them at the end of QEMU run */ vhost_vdpa_add_rx_pkts(alloc, net, &server->vdpa_thread); @@ -588,6 +588,24 @@ static void vhost_vdpa_tx_test(void *obj, void *arg, Q= GuestAllocator *alloc) vhost_vdpa_kick_tx_desc(&server->vdpa_thread, net, free_head, 2); vhost_vdpa_get_tx_pkt(alloc, net, free_head, &server->vdpa_thread); =20 + /* Out of order descriptors */ + free_head =3D vhost_vdpa_add_tx_pkt_descs(alloc, net, &server->vdpa_th= read, + 1); + free_head2 =3D vhost_vdpa_add_tx_pkt_descs(alloc, net, &server->vdpa_t= hread, + 1); + vhost_vdpa_kick_tx_desc(&server->vdpa_thread, net, free_head2, 1); + vhost_vdpa_kick_tx_desc(&server->vdpa_thread, net, free_head, 1); + + vhost_vdpa_get_tx_pkt(alloc, net, free_head2, &server->vdpa_thread); + vhost_vdpa_get_tx_pkt(alloc, net, free_head, &server->vdpa_thread); + + /* Out of order chains */ + free_head =3D vhost_vdpa_add_tx_pkt_descs(alloc, net, &server->vdpa_th= read, + 2); + free_head2 =3D vhost_vdpa_add_tx_pkt_descs(alloc, net, &server->vdpa_t= hread, + 2); + vhost_vdpa_kick_tx_desc(&server->vdpa_thread, net, free_head2, 2); + vhost_vdpa_kick_tx_desc(&server->vdpa_thread, net, free_head, 2); } =20 static void register_vhost_vdpa_test(void) --=20 2.53.0