From patchwork Thu Nov 17 03:33:03 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Jason Wang X-Patchwork-Id: 13046060 X-Patchwork-Delegate: dsahern@gmail.com Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 21EC6C433FE for ; Thu, 17 Nov 2022 03:34:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234153AbiKQDeJ (ORCPT ); Wed, 16 Nov 2022 22:34:09 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52772 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232117AbiKQDeI (ORCPT ); Wed, 16 Nov 2022 22:34:08 -0500 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E67B4DF3 for ; Wed, 16 Nov 2022 19:33:15 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1668655994; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=bEgs6r6K75N0WtORy2wa6jb70ubQdjOl8NHUGJWWq+I=; b=RXm4atCRIy3NjyIvZOJFwT4l3bx7s0hxvRP6HKOfzJLdcBcCum+3R2CyYx3i/wNKgh8zrM +Aa6XLO0E++I0av8eaSQI+JNuBGHoCrbmvP+EwYm5xsN4GwqBcnNrn3nSLKPwyqWXBijTG lbultdKoxnJhU/nSkNxVz+zD8owfSMk= Received: from mimecast-mx02.redhat.com (mx3-rdu2.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-316-0HmsnkxuP5erzPkSKma_lg-1; Wed, 16 Nov 2022 22:33:11 -0500 X-MC-Unique: 0HmsnkxuP5erzPkSKma_lg-1 Received: from smtp.corp.redhat.com (int-mx09.intmail.prod.int.rdu2.redhat.com [10.11.54.9]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id A09223C01DED; Thu, 17 Nov 2022 03:33:10 +0000 (UTC) Received: from localhost.localdomain (ovpn-13-248.pek2.redhat.com [10.72.13.248]) by smtp.corp.redhat.com (Postfix) with ESMTP id BE7E7475060; Thu, 17 Nov 2022 03:33:06 +0000 (UTC) From: Jason Wang To: dsahern@kernel.org, netdev@vger.kernel.org Cc: virtualization@lists.linux-foundation.org, si-wei.liu@oracle.com, mst@redhat.com, eperezma@redhat.com, lingshan.zhu@intel.com, elic@nvidia.com, Jason Wang Subject: [PATCH V2] vdpa: allow provisioning device features Date: Thu, 17 Nov 2022 11:33:03 +0800 Message-Id: <20221117033303.16870-1-jasowang@redhat.com> MIME-Version: 1.0 Content-type: text/plain X-Scanned-By: MIMEDefang 3.1 on 10.11.54.9 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org This patch allows device features to be provisioned via vdpa. This will be useful for preserving migration compatibility between source and destination: # vdpa dev add name dev1 mgmtdev pci/0000:02:00.0 device_features 0x300020000 # dev1: mac 52:54:00:12:34:56 link up link_announce false mtu 65535 negotiated_features CTRL_VQ VERSION_1 ACCESS_PLATFORM Signed-off-by: Jason Wang Acked-by: Eugenio Pérez --- Changes since v1: - Use uint64_t instead of __u64 for device_features - Fix typos and tweak the manpage - Add device_features to the help text --- man/man8/vdpa-dev.8 | 15 +++++++++++++++ vdpa/include/uapi/linux/vdpa.h | 1 + vdpa/vdpa.c | 32 +++++++++++++++++++++++++++++--- 3 files changed, 45 insertions(+), 3 deletions(-) diff --git a/man/man8/vdpa-dev.8 b/man/man8/vdpa-dev.8 index 9faf3838..43e5bf48 100644 --- a/man/man8/vdpa-dev.8 +++ b/man/man8/vdpa-dev.8 @@ -31,6 +31,7 @@ vdpa-dev \- vdpa device configuration .I NAME .B mgmtdev .I MGMTDEV +.RI "[ device_features " DEVICE_FEATURES " ]" .RI "[ mac " MACADDR " ]" .RI "[ mtu " MTU " ]" .RI "[ max_vqp " MAX_VQ_PAIRS " ]" @@ -74,6 +75,15 @@ Name of the new vdpa device to add. Name of the management device to use for device addition. .PP +.BI device_features " DEVICE_FEATURES" +Specifies the virtio device features bit-mask that is provisioned for the new vdpa device. + +The bits can be found under include/uapi/linux/virtio*h. + +see macros such as VIRTIO_F_ and VIRTIO_XXX(e.g NET)_F_ for specific bit values. + +This is optional. + .BI mac " MACADDR" - specifies the mac address for the new vdpa device. This is applicable only for the network type of vdpa device. This is optional. @@ -127,6 +137,11 @@ vdpa dev add name foo mgmtdev vdpa_sim_net Add the vdpa device named foo on the management device vdpa_sim_net. .RE .PP +vdpa dev add name foo mgmtdev vdpa_sim_net device_features 0x300020000 +.RS 4 +Add the vdpa device named foo on the management device vdpa_sim_net with device_features of 0x300020000 +.RE +.PP vdpa dev add name foo mgmtdev vdpa_sim_net mac 00:11:22:33:44:55 .RS 4 Add the vdpa device named foo on the management device vdpa_sim_net with mac address of 00:11:22:33:44:55. diff --git a/vdpa/include/uapi/linux/vdpa.h b/vdpa/include/uapi/linux/vdpa.h index 94e4dad1..7c961991 100644 --- a/vdpa/include/uapi/linux/vdpa.h +++ b/vdpa/include/uapi/linux/vdpa.h @@ -51,6 +51,7 @@ enum vdpa_attr { VDPA_ATTR_DEV_QUEUE_INDEX, /* u32 */ VDPA_ATTR_DEV_VENDOR_ATTR_NAME, /* string */ VDPA_ATTR_DEV_VENDOR_ATTR_VALUE, /* u64 */ + VDPA_ATTR_DEV_FEATURES, /* u64 */ /* new attributes must be added above here */ VDPA_ATTR_MAX, diff --git a/vdpa/vdpa.c b/vdpa/vdpa.c index b73e40b4..d0ce5e22 100644 --- a/vdpa/vdpa.c +++ b/vdpa/vdpa.c @@ -27,6 +27,7 @@ #define VDPA_OPT_VDEV_MTU BIT(5) #define VDPA_OPT_MAX_VQP BIT(6) #define VDPA_OPT_QUEUE_INDEX BIT(7) +#define VDPA_OPT_VDEV_FEATURES BIT(8) struct vdpa_opts { uint64_t present; /* flags of present items */ @@ -38,6 +39,7 @@ struct vdpa_opts { uint16_t mtu; uint16_t max_vqp; uint32_t queue_idx; + uint64_t device_features; }; struct vdpa { @@ -187,6 +189,17 @@ static int vdpa_argv_u32(struct vdpa *vdpa, int argc, char **argv, return get_u32(result, *argv, 10); } +static int vdpa_argv_u64_hex(struct vdpa *vdpa, int argc, char **argv, + uint64_t *result) +{ + if (argc <= 0 || !*argv) { + fprintf(stderr, "number expected\n"); + return -EINVAL; + } + + return get_u64(result, *argv, 16); +} + struct vdpa_args_metadata { uint64_t o_flag; const char *err_msg; @@ -244,6 +257,10 @@ static void vdpa_opts_put(struct nlmsghdr *nlh, struct vdpa *vdpa) mnl_attr_put_u16(nlh, VDPA_ATTR_DEV_NET_CFG_MAX_VQP, opts->max_vqp); if (opts->present & VDPA_OPT_QUEUE_INDEX) mnl_attr_put_u32(nlh, VDPA_ATTR_DEV_QUEUE_INDEX, opts->queue_idx); + if (opts->present & VDPA_OPT_VDEV_FEATURES) { + mnl_attr_put_u64(nlh, VDPA_ATTR_DEV_FEATURES, + opts->device_features); + } } static int vdpa_argv_parse(struct vdpa *vdpa, int argc, char **argv, @@ -329,6 +346,14 @@ static int vdpa_argv_parse(struct vdpa *vdpa, int argc, char **argv, NEXT_ARG_FWD(); o_found |= VDPA_OPT_QUEUE_INDEX; + } else if (!strcmp(*argv, "device_features") && + (o_optional & VDPA_OPT_VDEV_FEATURES)) { + NEXT_ARG_FWD(); + err = vdpa_argv_u64_hex(vdpa, argc, argv, + &opts->device_features); + if (err) + return err; + o_found |= VDPA_OPT_VDEV_FEATURES; } else { fprintf(stderr, "Unknown option \"%s\"\n", *argv); return -EINVAL; @@ -615,8 +640,9 @@ static int cmd_mgmtdev(struct vdpa *vdpa, int argc, char **argv) static void cmd_dev_help(void) { fprintf(stderr, "Usage: vdpa dev show [ DEV ]\n"); - fprintf(stderr, " vdpa dev add name NAME mgmtdev MANAGEMENTDEV [ mac MACADDR ] [ mtu MTU ]\n"); - fprintf(stderr, " [ max_vqp MAX_VQ_PAIRS ]\n"); + fprintf(stderr, " vdpa dev add name NAME mgmtdevMANAGEMENTDEV [ device_features DEVICE_FEATURES]\n"); + fprintf(stderr, " [ mac MACADDR ] [ mtu MTU ]\n"); + fprintf(stderr, " [ max_vqp MAX_VQ_PAIRS ]\n"); fprintf(stderr, " vdpa dev del DEV\n"); fprintf(stderr, "Usage: vdpa dev config COMMAND [ OPTIONS ]\n"); fprintf(stderr, "Usage: vdpa dev vstats COMMAND\n"); @@ -708,7 +734,7 @@ static int cmd_dev_add(struct vdpa *vdpa, int argc, char **argv) err = vdpa_argv_parse_put(nlh, vdpa, argc, argv, VDPA_OPT_VDEV_MGMTDEV_HANDLE | VDPA_OPT_VDEV_NAME, VDPA_OPT_VDEV_MAC | VDPA_OPT_VDEV_MTU | - VDPA_OPT_MAX_VQP); + VDPA_OPT_MAX_VQP | VDPA_OPT_VDEV_FEATURES); if (err) return err;