From nobody Mon Feb 9 20:36:57 2026 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 55A9AC0015E for ; Thu, 3 Aug 2023 10:14:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235261AbjHCKOO (ORCPT ); Thu, 3 Aug 2023 06:14:14 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51830 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235252AbjHCKOK (ORCPT ); Thu, 3 Aug 2023 06:14:10 -0400 Received: from mail-yw1-x1149.google.com (mail-yw1-x1149.google.com [IPv6:2607:f8b0:4864:20::1149]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 57C04272E for ; Thu, 3 Aug 2023 03:14:08 -0700 (PDT) Received: by mail-yw1-x1149.google.com with SMTP id 00721157ae682-5840614b13cso13814577b3.0 for ; Thu, 03 Aug 2023 03:14:08 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20221208; t=1691057647; x=1691662447; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=Y1wRhIRrggJAZYs6e7aV6RdIU6iSXzW0ONi/CWI4qUk=; b=v8M8EpvgykyvNj5+VFK4+5VS1GCx+4thN93X5qGdv2Q6mDg+Q9BprkKi/ZqVY1cMB5 hgughi4UN1aYu/EXNqY13NPNEQutZvvu2GYwDAvr8QOh2o+EQF3P9BYp4pftEx0ox7R7 H293Y2C2VTDWZWO6xMfqIKxlFoQitde1l6TRNNpWpcVfHJP20iQVEqHd2/LLHggfZnBa ZYsMt0hplLT0HqFF4jX+LVen+NA6yXSnT9/tIhVW1iyXGrZn3ULvFc83mH9XfV5ftRLp iOKnNntwlT0uTtypEVze4RGIkmvLieWvFRULXEHMTA02TJWP0zXal6LCAjTnDjAfnCr4 3weA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1691057647; x=1691662447; 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=Y1wRhIRrggJAZYs6e7aV6RdIU6iSXzW0ONi/CWI4qUk=; b=IVTFdUOHs+O8L1KJaGQnOswhWScW4j+u8aHjX2ClOBPUPW+2Eu5+roOdKf1gQO53Bv eQDMmznvjvJzfy7cEW9Y1jmU2gYukZk1QPrc24uucrSAkBByZAchlhOCnEj2fl5QW/W/ XMmF10CnSbdO0DFsrxFjZq5bvyKJA0cHYQPSjduK+40PWxPmbgOrr+lucCDL9V0mtFYI D2mC8nrWhAB41415YMccg2+eDGJi/2Nd5up14nQS97j/bOewATLzI9o54MwQ2lTGpd8b 0Ff4B+gKLj0rZZJZmlsq8GmxsEtU864SViWL8K2nRtPv3Fx7Q1vcr/+uu3yE+u4a0vlR J3kA== X-Gm-Message-State: ABy/qLaJ0vr/5sYIYFwePexhynT3DsUJZF+Lj1TtkWK1L53wdFDYFW8q 5dRqWqLeLmq3RHo6WXDO7K4X+7HOhVsv X-Google-Smtp-Source: APBJJlGq7z9/Y1wQFTi6d5yV5b9fzok7EZ8JGI+3DYlCHleYWyG2dZOEveRtsUS2kTL+q5mmdG0WEODi8+D8 X-Received: from mshavit.ntc.corp.google.com ([2401:fa00:95:20c:39d1:8774:b733:6210]) (user=mshavit job=sendgmr) by 2002:a81:b301:0:b0:573:54d8:e5be with SMTP id r1-20020a81b301000000b0057354d8e5bemr268745ywh.3.1691057647550; Thu, 03 Aug 2023 03:14:07 -0700 (PDT) Date: Thu, 3 Aug 2023 18:12:21 +0800 In-Reply-To: <20230803101351.1561031-1-mshavit@google.com> Mime-Version: 1.0 References: <20230803101351.1561031-1-mshavit@google.com> X-Mailer: git-send-email 2.41.0.585.gd2178a4bd4-goog Message-ID: <20230803181225.v5.1.I18d69f4908b8a9f801239117d2a6c3f5aa1e2e76@changeid> Subject: [PATCH v5 1/6] iommu/arm-smmu-v3: Simplify arm_smmu_enable_ats From: Michael Shavit To: iommu@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Cc: baolu.lu@linux.intel.com, will@kernel.org, jgg@nvidia.com, jean-philippe@linaro.org, robin.murphy@arm.com, nicolinc@nvidia.com, Michael Shavit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" 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 --- (no changes since v2) Changes in v2: - Fix commit message wrapping 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/ar= m/arm-smmu-v3/arm-smmu-v3.c index 61de66d17a5d5..4df335424b266 100644 --- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c @@ -2305,7 +2305,7 @@ static void arm_smmu_enable_ats(struct arm_smmu_maste= r *master) pdev =3D to_pci_dev(master->dev); =20 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); } --=20 2.41.0.585.gd2178a4bd4-goog