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=-9.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,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 AB018C43219 for ; Sat, 27 Apr 2019 01:45:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6CC66215EA for ; Sat, 27 Apr 2019 01:45:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1556329508; bh=tKy5HN1au7aRKS1G0+KswYVtNsaC9sOxpoBq4LDsCac=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=FVHM/f00qAq/LBJtTAnqIDbk7wEpbM7aEIggOWZCjWmRbP3XXhnxRuZjqR+1eWK4x 8V5EExqcYG2BIwdZ9r+4LCZ6tSvv8w0UQTGFsNnfq7jwFPnxMEiPyUdY1nPr3H8mUp S/+XcUEDD6c+O+4/WlKkSrAFK5rlFZoTd082PLcI= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727474AbfD0BpH (ORCPT ); Fri, 26 Apr 2019 21:45:07 -0400 Received: from mail.kernel.org ([198.145.29.99]:48514 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728547AbfD0BoL (ORCPT ); Fri, 26 Apr 2019 21:44:11 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id E4189208CB; Sat, 27 Apr 2019 01:44:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1556329450; bh=tKy5HN1au7aRKS1G0+KswYVtNsaC9sOxpoBq4LDsCac=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=MvqLfGyUc54mllyKAueoQpOnwTRAoamAV4560zKlUDJm3fIedKWHqB8gQkrzN+72a 1gZV4OqUeXSnRvOcaIWCoL6L/sMVeRDajltGleMIiE8H7k+M/4P/EVzXnc2Ph5AdOs avz5G+o2c2TDN2LfDiKe+aXNpNPuBQJfNNSbvHQ8= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Joerg Roedel , Sasha Levin , iommu@lists.linux-foundation.org Subject: [PATCH AUTOSEL 4.4 9/9] iommu/amd: Set exclusion range correctly Date: Fri, 26 Apr 2019 21:43:54 -0400 Message-Id: <20190427014356.8940-9-sashal@kernel.org> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20190427014356.8940-1-sashal@kernel.org> References: <20190427014356.8940-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Joerg Roedel [ Upstream commit 3c677d206210f53a4be972211066c0f1cd47fe12 ] The exlcusion range limit register needs to contain the base-address of the last page that is part of the range, as bits 0-11 of this register are treated as 0xfff by the hardware for comparisons. So correctly set the exclusion range in the hardware to the last page which is _in_ the range. Fixes: b2026aa2dce44 ('x86, AMD IOMMU: add functions for programming IOMMU MMIO space') Signed-off-by: Joerg Roedel Signed-off-by: Sasha Levin --- drivers/iommu/amd_iommu_init.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c index 94f1bf772ec9..db85cc5791dc 100644 --- a/drivers/iommu/amd_iommu_init.c +++ b/drivers/iommu/amd_iommu_init.c @@ -295,7 +295,7 @@ static void iommu_write_l2(struct amd_iommu *iommu, u8 address, u32 val) static void iommu_set_exclusion_range(struct amd_iommu *iommu) { u64 start = iommu->exclusion_start & PAGE_MASK; - u64 limit = (start + iommu->exclusion_length) & PAGE_MASK; + u64 limit = (start + iommu->exclusion_length - 1) & PAGE_MASK; u64 entry; if (!iommu->exclusion_start) -- 2.19.1