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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1FBC4C77B7C for ; Wed, 10 May 2023 20:53:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237346AbjEJUxN (ORCPT ); Wed, 10 May 2023 16:53:13 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42232 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237163AbjEJUw1 (ORCPT ); Wed, 10 May 2023 16:52:27 -0400 Received: from mail-pj1-x104a.google.com (mail-pj1-x104a.google.com [IPv6:2607:f8b0:4864:20::104a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C64E81707 for ; Wed, 10 May 2023 13:51:50 -0700 (PDT) Received: by mail-pj1-x104a.google.com with SMTP id 98e67ed59e1d1-24dfc3c668dso4118420a91.1 for ; Wed, 10 May 2023 13:51:50 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20221208; t=1683751876; x=1686343876; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=DMTIUjk5Ind647HSgdl65AQXCGi9ZS5fYo432OHDtSQ=; b=KPCdBXKKrCR73vDaoJkOuz1eCOKkI8LYLClUu3ZrD6Rg2/zc1ZSSm1qiKat0BbRArq FzmRUM7rp0v+9GCIQNvhfqNy6gVsr5Z+UcEeGdXWHGtGkuO8UqQD+KxCtxreNbiahZ4y WRs9ZnTK8MAfnni7I6rJo6ZgF2pU32hZo8ijPo0ne33mYgduNBv5MO3HGN+bs9Od89QK i2LHTDL9KXS/yzLi1erv9ZaYyyIhnsYBtHV6e5vK7hSE63IfP6ma2qN7HjsasosoGTdT Q5gvPvvoQSCTowCCHHUlbYR2j7v0iItW60tukvbIeG92nL1GMCHNrDjF6xU3rK/ctXeO aY9Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1683751876; x=1686343876; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=DMTIUjk5Ind647HSgdl65AQXCGi9ZS5fYo432OHDtSQ=; b=ZvSCU5qI+yoyK/GGjt0bQLbXs5pjTLm3pj5B0fijCHBydOUraDiS9qdmHczfv7cjIA meHHZXcjkrSaqA9Q28fqV7u7+TAy+4f6vWlcdV+yptT21S1WVeWazgET7EYJQ2lWMMkS xc/k7frV5rX0h0njZOwpBBjdxJMgd44V9wP/NAhe0WbkluzeKFZBkOAd/IB3hdPWSImG 9BBBP3byIaaR8gb5A0j5kqjTSjU7D9y40oqaT01NDhtiFtkbdYYg3Rt4B4eeQHfDte1q 9ViWJgPF2be0v1KdIXQVSGsfhALlurIxNZWpLLIIfAOXKOFN5W25GRSXj4By+V5YjMxp EAMg== X-Gm-Message-State: AC+VfDwcgUMOZmDG9J37kmLMebALa/5Z1RpS8GTN5cNhstQGZlt2aepr H4mdYEl6tK+jUlnwVl3XOyUVS1I/4s+U X-Google-Smtp-Source: ACHHUZ47UrMzz7gfleKmwaFULxZzolcnVNmCc5mUtValZYiJTjKDcV7CB0gT7x4GUYJvV4hW6CYE2C8IA55d X-Received: from mshavit.ntc.corp.google.com ([2401:fa00:95:20c:2b1f:8d06:7923:f154]) (user=mshavit job=sendgmr) by 2002:a17:90a:db0f:b0:24d:f863:458c with SMTP id g15-20020a17090adb0f00b0024df863458cmr5910104pjv.1.1683751876335; Wed, 10 May 2023 13:51:16 -0700 (PDT) Date: Thu, 11 May 2023 04:50:50 +0800 In-Reply-To: <20230510205054.2667898-1-mshavit@google.com> Mime-Version: 1.0 References: <20230510205054.2667898-1-mshavit@google.com> X-Mailer: git-send-email 2.40.1.521.gf1e218fcd8-goog Message-ID: <20230510205054.2667898-4-mshavit@google.com> Subject: [PATCH v1 3/5] iommu/arm-smmu-v3: Simplify arm_smmu_enable_ats From: Michael Shavit To: Will Deacon , Robin Murphy , Joerg Roedel Cc: Michael Shavit , jean-philippe@linaro.org, nicolinc@nvidia.com, jgg@nvidia.com, baolu.lu@linux.intel.com, linux-arm-kernel@lists.infradead.org, iommu@lists.linux.dev, linux-kernel@vger.kernel.org Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org arm_smmu_enable_ats's call to inv_domain would trigger an invalidation for all masters that a domain is attached to everytime it's attached to another ATS-enabled master. It doesn't seem like those invalidations are necessary, and it's easier to reason about arm_smmu_enable_ats if it only issues invalidation commands for the current master. Signed-off-by: Michael Shavit --- drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c index 7b4399b5ba68b..47dda287a4736 100644 --- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c @@ -2275,7 +2275,7 @@ static void arm_smmu_enable_ats(struct arm_smmu_master *master) pdev = to_pci_dev(master->dev); atomic_inc(&smmu_domain->nr_ats_masters); - arm_smmu_atc_inv_domain(smmu_domain, 0, 0, 0); + arm_smmu_atc_inv_master(master); if (pci_enable_ats(pdev, stu)) dev_err(master->dev, "Failed to enable ATS (STU %zu)\n", stu); } -- 2.40.1.521.gf1e218fcd8-goog