From nobody Sun Feb 8 11:44:25 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 E0FAEEB64D8 for ; Wed, 14 Jun 2023 15:44:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244895AbjFNPok (ORCPT ); Wed, 14 Jun 2023 11:44:40 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42706 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S244655AbjFNPoT (ORCPT ); Wed, 14 Jun 2023 11:44:19 -0400 Received: from mail-pf1-x449.google.com (mail-pf1-x449.google.com [IPv6:2607:f8b0:4864:20::449]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 75CC2210B for ; Wed, 14 Jun 2023 08:44:15 -0700 (PDT) Received: by mail-pf1-x449.google.com with SMTP id d2e1a72fcca58-650cb5a6b0cso6469492b3a.1 for ; Wed, 14 Jun 2023 08:44:15 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20221208; t=1686757455; x=1689349455; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=kKyYB6nGtYqnelo6XDlWvQzY0JjgxL/I8n3xKSQjyKM=; b=ZreyidDpJbP1PBXH0/670/kPY2SsUh00/efeS6mDpY0HajYSURNuwl2jgv15mHAY+8 BQnjoS82KZhUCP+ZW8JKdnnpOoil/pxglVP0s2csLwMNXQxHU51EaIYCRwcdKqquCh0q 3bWW4wrsmrxasyohwzBecrXf6yKsHWQhn0bySkpCPo4xUAgaHO41cs19iiK6VFDnmGcL 1z3TlJElBou8TAuRPKhYnjDJwUUqq75L0bf3w6VNMdMUoFGls32SxQ9iHK9xTnV32fN7 YIabDW9594lEZ4404D02Bxq7KeKnTkNz75qnKx2pKgIU+oWiPHE0kF1iXqTgciI2k5V0 H35Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1686757455; x=1689349455; 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=kKyYB6nGtYqnelo6XDlWvQzY0JjgxL/I8n3xKSQjyKM=; b=f0GOWWPGSroVzdT7/EUsbtR8+oIkP5RBmSJPylpmBk2adSgWEM34Dd2kutvk3AiuRA i7+cPUwScgVDGtadQHY+ZpqKwlS5oTah+W7zeD24/GIqT7NXYtjG/hkJAm8COC/+LG38 1de1VyqzFaLYpO40ePEZtoTVSuIN8waSts4p9KWD9wJSe7b/9bIkkBuClE7KsKfLzfNG 80+QnfVUWqlWZsmLFSFnykQN0aaOgId4B3f8+x8BcDesEPGWC8c+xAA9F2MVVDkvhgAF CCcC7DzCXQBLABF5fFp5Vimmmr0QayMIxC8p2jYrYblMsL2Ov5QI56VzUROfX06cdtVr GpPQ== X-Gm-Message-State: AC+VfDzN8vto3tBMoeLgWFyVt7VLI7xMYEBhrVIJ5rfZHNdIFY7hA8Wj Fm9IYL6OAkASQ2ZVz0I8dJ67z8PsG/CV X-Google-Smtp-Source: ACHHUZ5hvf161DqxDEUjciWGgh2uDlHkYPKEsVFxC66gt2tXnPwcs58oZC95f7+2kSAq6UzNy1BZjwtxJnV7 X-Received: from mshavit.ntc.corp.google.com ([2401:fa00:95:20c:c6e6:49bf:5c44:5965]) (user=mshavit job=sendgmr) by 2002:a05:6a00:2e99:b0:654:424b:17d2 with SMTP id fd25-20020a056a002e9900b00654424b17d2mr664816pfb.2.1686757454862; Wed, 14 Jun 2023 08:44:14 -0700 (PDT) Date: Wed, 14 Jun 2023 23:41:58 +0800 In-Reply-To: <20230614154304.2860121-1-mshavit@google.com> Mime-Version: 1.0 References: <20230614154304.2860121-1-mshavit@google.com> X-Mailer: git-send-email 2.41.0.162.gfafddb0af9-goog Message-ID: <20230614154304.2860121-7-mshavit@google.com> Subject: [PATCH v3 06/13] 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 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 --- v1->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 08f440fe1da6d..dc7a59e87a2b4 100644 --- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c @@ -2286,7 +2286,7 @@ 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 2.41.0.162.gfafddb0af9-goog