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Fri, 02 Jun 2023 04:52:33 -0700 (PDT) From: Hawkins Jiawei To: jasowang@redhat.com, mst@redhat.com, eperezma@redhat.com Cc: qemu-devel@nongnu.org, yin31149@gmail.com, 18801353760@163.com Subject: [PATCH v4 4/6] virtio-net: expose virtio_net_supported_guest_offloads() Date: Fri, 2 Jun 2023 19:52:16 +0800 Message-Id: <43679506f3f039a7aa2bdd5b49785107b5dfd7d4.1685704856.git.yin31149@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: References: MIME-Version: 1.0 Received-SPF: pass client-ip=2607:f8b0:4864:20::636; envelope-from=yin31149@gmail.com; helo=mail-pl1-x636.google.com X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_ENVFROM_END_DIGIT=0.25, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, 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+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org To support restoring offloads state in vdpa, it is necessary to expose the function virtio_net_supported_guest_offloads(). According to VirtIO standard, "Upon feature negotiation corresponding offload gets enabled to preserve backward compatibility.". Therefore, QEMU uses this function to get the device supported offloads. This allows QEMU to know the device's defaults and skip the control message sending if these defaults align with the driver's configuration. Note that the device's defaults can mismatch the driver's configuration only at live migration. Signed-off-by: Hawkins Jiawei --- hw/net/virtio-net.c | 2 +- include/hw/virtio/virtio-net.h | 1 + 2 files changed, 2 insertions(+), 1 deletion(-) diff --git a/hw/net/virtio-net.c b/hw/net/virtio-net.c index 7b27dad6c4..7e8897a8bc 100644 --- a/hw/net/virtio-net.c +++ b/hw/net/virtio-net.c @@ -874,7 +874,7 @@ static uint64_t virtio_net_guest_offloads_by_features(uint32_t features) return guest_offloads_mask & features; } -static inline uint64_t virtio_net_supported_guest_offloads(const VirtIONet *n) +uint64_t virtio_net_supported_guest_offloads(const VirtIONet *n) { VirtIODevice *vdev = VIRTIO_DEVICE(n); return virtio_net_guest_offloads_by_features(vdev->guest_features); diff --git a/include/hw/virtio/virtio-net.h b/include/hw/virtio/virtio-net.h index ef234ffe7e..5f5dcb4572 100644 --- a/include/hw/virtio/virtio-net.h +++ b/include/hw/virtio/virtio-net.h @@ -227,5 +227,6 @@ size_t virtio_net_handle_ctrl_iov(VirtIODevice *vdev, unsigned out_num); void virtio_net_set_netclient_name(VirtIONet *n, const char *name, const char *type); +uint64_t virtio_net_supported_guest_offloads(const VirtIONet *n); #endif