From nobody Wed Jan 15 15:49:05 2025 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 11732CD5BCE for ; Tue, 19 Sep 2023 14:43:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232948AbjISOnQ (ORCPT ); Tue, 19 Sep 2023 10:43:16 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49784 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232943AbjISOnG (ORCPT ); Tue, 19 Sep 2023 10:43:06 -0400 Received: from out30-124.freemail.mail.aliyun.com (out30-124.freemail.mail.aliyun.com [115.124.30.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CFAB5BF; Tue, 19 Sep 2023 07:42:52 -0700 (PDT) X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R201e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=ay29a033018046051;MF=guwen@linux.alibaba.com;NM=1;PH=DS;RN=13;SR=0;TI=SMTPD_---0VsRsRuO_1695134567; Received: from localhost(mailfrom:guwen@linux.alibaba.com fp:SMTPD_---0VsRsRuO_1695134567) by smtp.aliyun-inc.com; Tue, 19 Sep 2023 22:42:49 +0800 From: Wen Gu To: kgraul@linux.ibm.com, wenjia@linux.ibm.com, jaka@linux.ibm.com, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com Cc: alibuda@linux.alibaba.com, tonylu@linux.alibaba.com, guwen@linux.alibaba.com, linux-s390@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH net-next 07/18] net/smc: disable SEID on non-s390 architecture Date: Tue, 19 Sep 2023 22:41:51 +0800 Message-Id: <1695134522-126655-8-git-send-email-guwen@linux.alibaba.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1695134522-126655-1-git-send-email-guwen@linux.alibaba.com> References: <1695134522-126655-1-git-send-email-guwen@linux.alibaba.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" On s390 architecture SMC-Dv2 SEID is generated by ISMv2 device with partial cpuid. It is predefined and unique to represents the physical machine (CPC), the maximum communication space of SMC-D. On non-s390 archs like x86/64 or ARM, there is no similar information to identify physical machine, especially in virtualization scenarios like KVM, etc. In such cases, SEID is forcibly disabled and the user- defined UEID will be used to represent the communicable space. Signed-off-by: Wen Gu --- net/smc/smc_clc.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/net/smc/smc_clc.c b/net/smc/smc_clc.c index c08e138..be56a7d 100644 --- a/net/smc/smc_clc.c +++ b/net/smc/smc_clc.c @@ -155,10 +155,12 @@ static int smc_clc_ueid_remove(char *ueid) rc =3D 0; } } +#if IS_ENABLED(CONFIG_S390) if (!rc && !smc_clc_eid_table.ueid_cnt) { smc_clc_eid_table.seid_enabled =3D 1; rc =3D -EAGAIN; /* indicate success and enabling of seid */ } +#endif write_unlock(&smc_clc_eid_table.lock); return rc; } @@ -273,22 +275,30 @@ int smc_nl_dump_seid(struct sk_buff *skb, struct netl= ink_callback *cb) =20 int smc_nl_enable_seid(struct sk_buff *skb, struct genl_info *info) { +#if IS_ENABLED(CONFIG_S390) write_lock(&smc_clc_eid_table.lock); smc_clc_eid_table.seid_enabled =3D 1; write_unlock(&smc_clc_eid_table.lock); return 0; +#else + return -EOPNOTSUPP; +#endif } =20 int smc_nl_disable_seid(struct sk_buff *skb, struct genl_info *info) { int rc =3D 0; =20 +#if IS_ENABLED(CONFIG_S390) write_lock(&smc_clc_eid_table.lock); if (!smc_clc_eid_table.ueid_cnt) rc =3D -ENOENT; else smc_clc_eid_table.seid_enabled =3D 0; write_unlock(&smc_clc_eid_table.lock); +#else + rc =3D -EOPNOTSUPP; +#endif return rc; } =20 @@ -1290,7 +1300,11 @@ void __init smc_clc_init(void) INIT_LIST_HEAD(&smc_clc_eid_table.list); rwlock_init(&smc_clc_eid_table.lock); smc_clc_eid_table.ueid_cnt =3D 0; +#if IS_ENABLED(CONFIG_S390) smc_clc_eid_table.seid_enabled =3D 1; +#else + smc_clc_eid_table.seid_enabled =3D 0; +#endif } =20 void smc_clc_exit(void) --=20 1.8.3.1