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Tue, 29 Aug 2023 02:11:28 -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 v3 1/3] vdpa: Add SetSteeringEBPF method for NetClientState Date: Tue, 29 Aug 2023 17:11:15 +0800 Message-Id: <30509e3c3b07bcadd95d5932aeb16820cb022902.1693299194.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::431; envelope-from=yin31149@gmail.com; helo=mail-pf1-x431.google.com X-Spam_score_int: -17 X-Spam_score: -1.8 X-Spam_bar: - X-Spam_report: (-1.8 / 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 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 At present, to enable the VIRTIO_NET_F_RSS feature, eBPF must be loaded for the vhost backend. Given that vhost-vdpa is one of the vhost backend, we need to implement the SetSteeringEBPF method to support RSS for vhost-vdpa, even if vhost-vdpa calculates the rss hash in the hardware device instead of in the kernel by eBPF. Although this requires QEMU to be compiled with `--enable-bpf` configuration even if the vdpa device does not use eBPF to calculate the rss hash, this can avoid adding the specific conditional statements for vDPA case to enable the VIRTIO_NET_F_RSS feature, which reduces code maintainbility. Suggested-by: Eugenio Pérez Signed-off-by: Hawkins Jiawei --- net/vhost-vdpa.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/net/vhost-vdpa.c b/net/vhost-vdpa.c index b29f84f54c..11f89e7032 100644 --- a/net/vhost-vdpa.c +++ b/net/vhost-vdpa.c @@ -238,6 +238,12 @@ static void vhost_vdpa_cleanup(NetClientState *nc) } } +/** Dummy SetSteeringEBPF to support RSS for vhost-vdpa backend */ +static bool vhost_vdpa_set_steering_ebpf(NetClientState *nc, int prog_fd) +{ + return true; +} + static bool vhost_vdpa_has_vnet_hdr(NetClientState *nc) { assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA); @@ -400,6 +406,7 @@ static NetClientInfo net_vhost_vdpa_info = { .has_vnet_hdr = vhost_vdpa_has_vnet_hdr, .has_ufo = vhost_vdpa_has_ufo, .check_peer_type = vhost_vdpa_check_peer_type, + .set_steering_ebpf = vhost_vdpa_set_steering_ebpf, }; static int64_t vhost_vdpa_get_vring_group(int device_fd, unsigned vq_index, @@ -1241,6 +1248,7 @@ static NetClientInfo net_vhost_vdpa_cvq_info = { .has_vnet_hdr = vhost_vdpa_has_vnet_hdr, .has_ufo = vhost_vdpa_has_ufo, .check_peer_type = vhost_vdpa_check_peer_type, + .set_steering_ebpf = vhost_vdpa_set_steering_ebpf, }; 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Tue, 29 Aug 2023 02:11:33 -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 v3 2/3] vdpa: Restore receive-side scaling state Date: Tue, 29 Aug 2023 17:11:16 +0800 Message-Id: <47b17e160ba4e55b24790b7d73b22d2b437ebe3c.1693299194.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::430; envelope-from=yin31149@gmail.com; helo=mail-pf1-x430.google.com X-Spam_score_int: -17 X-Spam_score: -1.8 X-Spam_bar: - X-Spam_report: (-1.8 / 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 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 This patch reuses vhost_vdpa_net_load_rss() with some refactorings to restore the receive-side scaling state at device's startup. Signed-off-by: Hawkins Jiawei --- v3: - resolve conflict with updated patch "Vhost-vdpa Shadow Virtqueue Hash calculation Support" v2: https://lore.kernel.org/all/af33aa80bc4ef0b2cec6c21b9448866c517fde80.1691926415.git.yin31149@gmail.com/ - Correct the feature usage to VIRTIO_NET_F_HASH_REPORT when loading the hash calculation state v1: https://lore.kernel.org/all/93d5d82f0a5df71df326830033e50358c8b6be7a.1691766252.git.yin31149@gmail.com/ net/vhost-vdpa.c | 54 ++++++++++++++++++++++++++++++++---------------- 1 file changed, 36 insertions(+), 18 deletions(-) diff --git a/net/vhost-vdpa.c b/net/vhost-vdpa.c index 11f89e7032..85547b7bbb 100644 --- a/net/vhost-vdpa.c +++ b/net/vhost-vdpa.c @@ -839,17 +839,28 @@ static int vhost_vdpa_net_load_rss(VhostVDPAState *s, const VirtIONet *n, cfg.hash_types = cpu_to_le32(n->rss_data.hash_types); - /* - * According to VirtIO standard, "Field reserved MUST contain zeroes. - * It is defined to make the structure to match the layout of - * virtio_net_rss_config structure, defined in 5.1.6.5.7.". - * - * Therefore, we need to zero the fields in struct virtio_net_rss_config, - * which corresponds the `reserved` field in - * struct virtio_net_hash_config. - */ - memset(&cfg.indirection_table_mask, 0, - sizeof_field(struct virtio_net_hash_config, reserved)); + if (do_rss) { + /* + * According to VirtIO standard, "Number of entries in indirection_table + * is (indirection_table_mask + 1)". + */ + cfg.indirection_table_mask = cpu_to_le16(n->rss_data.indirections_len - + 1); + cfg.unclassified_queue = cpu_to_le16(n->rss_data.default_queue); + cfg.max_tx_vq = cpu_to_le16(n->curr_queue_pairs); + } else { + /* + * According to VirtIO standard, "Field reserved MUST contain zeroes. + * It is defined to make the structure to match the layout of + * virtio_net_rss_config structure, defined in 5.1.6.5.7.". + * + * Therefore, we need to zero the fields in + * struct virtio_net_rss_config, which corresponds the `reserved` field + * in struct virtio_net_hash_config. + */ + memset(&cfg.indirection_table_mask, 0, + sizeof_field(struct virtio_net_hash_config, reserved)); + } table = g_malloc_n(n->rss_data.indirections_len, sizeof(n->rss_data.indirections_table[0])); @@ -886,6 +897,7 @@ static int vhost_vdpa_net_load_rss(VhostVDPAState *s, const VirtIONet *n, r = vhost_vdpa_net_load_cmd(s, out_cursor, in_cursor, VIRTIO_NET_CTRL_MQ, + do_rss ? VIRTIO_NET_CTRL_MQ_RSS_CONFIG : VIRTIO_NET_CTRL_MQ_HASH_CONFIG, data, ARRAY_SIZE(data)); if (unlikely(r < 0)) { @@ -920,13 +932,19 @@ static int vhost_vdpa_net_load_mq(VhostVDPAState *s, return r; } - if (!virtio_vdev_has_feature(&n->parent_obj, VIRTIO_NET_F_HASH_REPORT)) { - return 0; - } - - r = vhost_vdpa_net_load_rss(s, n, out_cursor, in_cursor, false); - if (unlikely(r < 0)) { - return r; + if (virtio_vdev_has_feature(&n->parent_obj, VIRTIO_NET_F_RSS)) { + /* load the receive-side scaling state */ + r = vhost_vdpa_net_load_rss(s, n, out_cursor, in_cursor, true); + if (unlikely(r < 0)) { + return r; + } + } else if (virtio_vdev_has_feature(&n->parent_obj, + VIRTIO_NET_F_HASH_REPORT)) { + /* load the hash calculation state */ + r = vhost_vdpa_net_load_rss(s, n, out_cursor, in_cursor, false); + if (unlikely(r < 0)) { + return r; + } } return 0; From patchwork Tue Aug 29 09:11:17 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hawkins Jiawei X-Patchwork-Id: 1827156 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; 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Tue, 29 Aug 2023 02:11:37 -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 v3 3/3] vdpa: Allow VIRTIO_NET_F_RSS in SVQ Date: Tue, 29 Aug 2023 17:11:17 +0800 Message-Id: <2d2a378291bfac4144a0c0c473cf80415bb580b3.1693299194.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::233; envelope-from=yin31149@gmail.com; helo=mail-oi1-x233.google.com X-Spam_score_int: -17 X-Spam_score: -1.8 X-Spam_bar: - X-Spam_report: (-1.8 / 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 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 Enable SVQ with VIRTIO_NET_F_RSS feature. Signed-off-by: Hawkins Jiawei --- net/vhost-vdpa.c | 1 + 1 file changed, 1 insertion(+) diff --git a/net/vhost-vdpa.c b/net/vhost-vdpa.c index 85547b7bbb..13da60aeda 100644 --- a/net/vhost-vdpa.c +++ b/net/vhost-vdpa.c @@ -119,6 +119,7 @@ static const uint64_t vdpa_svq_device_features = /* VHOST_F_LOG_ALL is exposed by SVQ */ BIT_ULL(VHOST_F_LOG_ALL) | BIT_ULL(VIRTIO_NET_F_HASH_REPORT) | + BIT_ULL(VIRTIO_NET_F_RSS) | BIT_ULL(VIRTIO_NET_F_RSC_EXT) | BIT_ULL(VIRTIO_NET_F_STANDBY) | BIT_ULL(VIRTIO_NET_F_SPEED_DUPLEX);