From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-10.0 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4CF97C433DF for ; Fri, 26 Jun 2020 10:35:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 26D3920768 for ; Fri, 26 Jun 2020 10:35:00 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linux-powerpc-org.20150623.gappssmtp.com header.i=@linux-powerpc-org.20150623.gappssmtp.com header.b="RaJtOd06" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727990AbgFZKe7 (ORCPT ); Fri, 26 Jun 2020 06:34:59 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35412 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725601AbgFZKe5 (ORCPT ); Fri, 26 Jun 2020 06:34:57 -0400 Received: from mail-lj1-x244.google.com (mail-lj1-x244.google.com [IPv6:2a00:1450:4864:20::244]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2FF08C08C5C1 for ; Fri, 26 Jun 2020 03:34:57 -0700 (PDT) Received: by mail-lj1-x244.google.com with SMTP id n24so9765618lji.10 for ; Fri, 26 Jun 2020 03:34:57 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux-powerpc-org.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=CCHg421KUhsy+nSn5wmRg7L3793Q0baKUacKDGsu3gU=; b=RaJtOd06tejhtMnJTI4hSfYVJKq3+dsmua7AuHA/tGNN6CJvocGYOew4CYhfZE4cac i7TaF3m0jU3HT4QwtCA+woEFwbbwex9mC6GEgiSMjD0Fdf/ZctltYYI5vWTY5n5zhWJk iEO2kwqycpvmhRpePLWHVIBGX11I/nBKPdL9lfE/qIlYqw/c4gIHAIdpXsYsyZahQ3Xt 5edgUqUfamZieSIuINuanhCAPiqf6vNwXoD0mlNRGPD/n0D3uQ0IVJJPKP+4hX2y+GK0 wCBI5UPbDmSW3LaRBA73mWHf8QQ2QyOo7cuM0wy+2YRCoT/qgumHgUSz76hSf/VguLSB soQA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=CCHg421KUhsy+nSn5wmRg7L3793Q0baKUacKDGsu3gU=; b=Q3HOneUGyRTeQWWi87TNuVayOqwUTHjPQO03xnt7hoHppFlhqPcpavmo1Usl2G5JrK F/ASmYNY5UlUYqNdxNp8pM0ySwbDnDqS+xNI7xY4aEIYBP1Olliz9VCL1QSldPKiJRgb gmgZhfXqwQ93nVe+g3DCDwyfI6dVsOzpK8Y4Q1uEvK195iBL1BIhiK9NQne9Ef1AzoZP mriG/jpOILls1NmwjA7p+ZNNburC0V+IMu59akbV5kDEktkBx0P9aM3vwJE8oxmyoID8 quI0Jniv05HIjhqyJfl0sHYJVTOhVi+mZcw3AUe0s5Xq8DOeaNCO60QaRV7Xki6Ef7co /50w== X-Gm-Message-State: AOAM532lPxO9lYcu7048F0CgTyxmuSux6xLRBjFEg8XVkMqeK4eIdHTo 73dot33egYHG2iC3RHztNNDyjGBYCxzZJA== X-Google-Smtp-Source: ABdhPJw+7T1XDcXCqIr9cVsu38qGqRrvTHRCh0lwPojGQZL4ZJH/BxtFZDolN6eArIv6e9ESAMI9DA== X-Received: by 2002:a2e:8107:: with SMTP id d7mr1184638ljg.363.1593167695548; Fri, 26 Jun 2020 03:34:55 -0700 (PDT) Received: from centos7-pv-guest.localdomain ([5.35.13.201]) by smtp.gmail.com with ESMTPSA id l1sm166124ljc.65.2020.06.26.03.34.54 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Fri, 26 Jun 2020 03:34:55 -0700 (PDT) From: Denis Kirjanov To: netdev@vger.kernel.org Cc: brouer@redhat.com, jgross@suse.com, wei.liu@kernel.org, paul@xen.org, ilias.apalodimas@linaro.org Subject: [PATCH net-next v11 1/3] xen: netif.h: add a new extra type for XDP Date: Fri, 26 Jun 2020 13:34:32 +0300 Message-Id: <1593167674-1065-2-git-send-email-kda@linux-powerpc.org> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1593167674-1065-1-git-send-email-kda@linux-powerpc.org> References: <1593167674-1065-1-git-send-email-kda@linux-powerpc.org> Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org The patch adds a new extra type to be able to diffirentiate between RX responses on xen-netfront side with the adjusted offset required for XDP processing. The offset value from a guest is passed via xenstore. Signed-off-by: Denis Kirjanov --- include/xen/interface/io/netif.h | 20 +++++++++++++++++++- 1 file changed, 19 insertions(+), 1 deletion(-) diff --git a/include/xen/interface/io/netif.h b/include/xen/interface/io/netif.h index 4f20dbc..2194322 100644 --- a/include/xen/interface/io/netif.h +++ b/include/xen/interface/io/netif.h @@ -161,6 +161,19 @@ */ /* + * "xdp-headroom" is used to request that extra space is added + * for XDP processing. The value is measured in bytes and passed by + * the frontend to be consistent between both ends. + * If the value is greater than zero that means that + * an RX response is going to be passed to an XDP program for processing. + * XEN_NETIF_MAX_XDP_HEADROOM defines the maximum headroom offset in bytes + * + * "feature-xdp-headroom" is set to "1" by the netback side like other features + * so a guest can check if an XDP program can be processed. + */ +#define XEN_NETIF_MAX_XDP_HEADROOM 0x7FFF + +/* * Control ring * ============ * @@ -846,7 +859,8 @@ struct xen_netif_tx_request { #define XEN_NETIF_EXTRA_TYPE_MCAST_ADD (2) /* u.mcast */ #define XEN_NETIF_EXTRA_TYPE_MCAST_DEL (3) /* u.mcast */ #define XEN_NETIF_EXTRA_TYPE_HASH (4) /* u.hash */ -#define XEN_NETIF_EXTRA_TYPE_MAX (5) +#define XEN_NETIF_EXTRA_TYPE_XDP (5) /* u.xdp */ +#define XEN_NETIF_EXTRA_TYPE_MAX (6) /* xen_netif_extra_info_t flags. */ #define _XEN_NETIF_EXTRA_FLAG_MORE (0) @@ -879,6 +893,10 @@ struct xen_netif_extra_info { uint8_t algorithm; uint8_t value[4]; } hash; + struct { + uint16_t headroom; + uint16_t pad[2]; + } xdp; uint16_t pad[3]; } u; }; -- 1.8.3.1