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=-6.6 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,URIBL_BLOCKED,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 B5018C43441 for ; Sun, 11 Nov 2018 23:19:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7BFCD20817 for ; Sun, 11 Nov 2018 23:19:08 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="ebSDOl4J" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7BFCD20817 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linuxfoundation.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389606AbeKLIV0 (ORCPT ); Mon, 12 Nov 2018 03:21:26 -0500 Received: from mail.kernel.org ([198.145.29.99]:48494 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2389561AbeKLIVX (ORCPT ); Mon, 12 Nov 2018 03:21:23 -0500 Received: from localhost (unknown [206.108.79.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 945FD2154B; Sun, 11 Nov 2018 22:31:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1541975486; bh=SyJ9pSRTHMCF0h9jdFuho0K9PUZRa7u4ip+p45FKRhE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ebSDOl4JI+Qvnrug67KIt23gvEmXBm3PsXg1vPzWrZTbHShEoJ1EJdukJZ/oVjt7b ynvbdtpVfX4Pi9Fu/y4pGzIVaJjBbZ7IpD+m9LsN5qWyRqTocHVSUAoMnsc9egnL/S 3xb6KqnLtAFFrbn4ypoBDvMSuU3LFsVGUyZVQ2vM= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Robin Murphy , Will Deacon Subject: [PATCH 4.18 282/350] iommu/arm-smmu: Ensure that page-table updates are visible before TLBI Date: Sun, 11 Nov 2018 14:22:26 -0800 Message-Id: <20181111221719.852735595@linuxfoundation.org> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20181111221707.043394111@linuxfoundation.org> References: <20181111221707.043394111@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 4.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: Will Deacon commit 7d321bd3542500caf125249f44dc37cb4e738013 upstream. The IO-pgtable code relies on the driver TLB invalidation callbacks to ensure that all page-table updates are visible to the IOMMU page-table walker. In the case that the page-table walker is cache-coherent, we cannot rely on an implicit DSB from the DMA-mapping code, so we must ensure that we execute a DSB in our tlb_add_flush() callback prior to triggering the invalidation. Cc: Cc: Robin Murphy Fixes: 2df7a25ce4a7 ("iommu/arm-smmu: Clean up DMA API usage") Signed-off-by: Will Deacon Signed-off-by: Greg Kroah-Hartman --- drivers/iommu/arm-smmu.c | 6 ++++++ 1 file changed, 6 insertions(+) --- a/drivers/iommu/arm-smmu.c +++ b/drivers/iommu/arm-smmu.c @@ -469,6 +469,9 @@ static void arm_smmu_tlb_inv_range_nosyn bool stage1 = cfg->cbar != CBAR_TYPE_S2_TRANS; void __iomem *reg = ARM_SMMU_CB(smmu_domain->smmu, cfg->cbndx); + if (smmu_domain->smmu->features & ARM_SMMU_FEAT_COHERENT_WALK) + wmb(); + if (stage1) { reg += leaf ? ARM_SMMU_CB_S1_TLBIVAL : ARM_SMMU_CB_S1_TLBIVA; @@ -510,6 +513,9 @@ static void arm_smmu_tlb_inv_vmid_nosync struct arm_smmu_domain *smmu_domain = cookie; void __iomem *base = ARM_SMMU_GR0(smmu_domain->smmu); + if (smmu_domain->smmu->features & ARM_SMMU_FEAT_COHERENT_WALK) + wmb(); + writel_relaxed(smmu_domain->cfg.vmid, base + ARM_SMMU_GR0_TLBIVMID); }