From patchwork Wed Mar 9 00:20:47 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kamal Mostafa X-Patchwork-Id: 594415 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from huckleberry.canonical.com (huckleberry.canonical.com [91.189.94.19]) by ozlabs.org (Postfix) with ESMTP id 13CB4140327; Wed, 9 Mar 2016 11:21:33 +1100 (AEDT) Received: from localhost ([127.0.0.1] helo=huckleberry.canonical.com) by huckleberry.canonical.com with esmtp (Exim 4.76) (envelope-from ) id 1adRsX-0001Ro-Vf; Wed, 09 Mar 2016 00:21:29 +0000 Received: from youngberry.canonical.com ([91.189.89.112]) by huckleberry.canonical.com with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.76) (envelope-from ) id 1adRrw-00019E-C2 for kernel-team@lists.ubuntu.com; Wed, 09 Mar 2016 00:20:52 +0000 Received: from 1.general.kamal.us.vpn ([10.172.68.52] helo=fourier) by youngberry.canonical.com with esmtpsa (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.76) (envelope-from ) id 1adRru-0002cq-U4; Wed, 09 Mar 2016 00:20:51 +0000 Received: from kamal by fourier with local (Exim 4.86) (envelope-from ) id 1adRrs-0005I3-9B; Tue, 08 Mar 2016 16:20:48 -0800 From: Kamal Mostafa To: CQ Tang Subject: [3.19.y-ckt stable] Patch "iommu/vt-d: Fix 64-bit accesses to 32-bit DMAR_GSTS_REG" has been added to the 3.19.y-ckt tree Date: Tue, 8 Mar 2016 16:20:47 -0800 Message-Id: <1457482847-20300-1-git-send-email-kamal@canonical.com> X-Mailer: git-send-email 2.7.0 X-Extended-Stable: 3.19 Cc: Kamal Mostafa , David Woodhouse , kernel-team@lists.ubuntu.com X-BeenThere: kernel-team@lists.ubuntu.com X-Mailman-Version: 2.1.14 Precedence: list List-Id: Kernel team discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: kernel-team-bounces@lists.ubuntu.com Sender: kernel-team-bounces@lists.ubuntu.com This is a note to let you know that I have just added a patch titled iommu/vt-d: Fix 64-bit accesses to 32-bit DMAR_GSTS_REG to the linux-3.19.y-queue branch of the 3.19.y-ckt extended stable tree which can be found at: http://kernel.ubuntu.com/git/ubuntu/linux.git/log/?h=linux-3.19.y-queue This patch is scheduled to be released in version 3.19.8-ckt16. If you, or anyone else, feels it should not be added to this tree, please reply to this email. For more information about the 3.19.y-ckt tree, see https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable Thanks. -Kamal ---8<------------------------------------------------------------ From 242ed61a4ca583f639c9de51f282352029845bb2 Mon Sep 17 00:00:00 2001 From: CQ Tang Date: Wed, 13 Jan 2016 21:15:03 +0000 Subject: iommu/vt-d: Fix 64-bit accesses to 32-bit DMAR_GSTS_REG commit fda3bec12d0979aae3f02ee645913d66fbc8a26e upstream. This is a 32-bit register. Apparently harmless on real hardware, but causing justified warnings in simulation. Signed-off-by: CQ Tang Signed-off-by: David Woodhouse Signed-off-by: Kamal Mostafa --- drivers/iommu/dmar.c | 2 +- drivers/iommu/intel_irq_remapping.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) -- 2.7.0 diff --git a/drivers/iommu/dmar.c b/drivers/iommu/dmar.c index 9847613..5a2ec39 100644 --- a/drivers/iommu/dmar.c +++ b/drivers/iommu/dmar.c @@ -1342,7 +1342,7 @@ void dmar_disable_qi(struct intel_iommu *iommu) raw_spin_lock_irqsave(&iommu->register_lock, flags); - sts = dmar_readq(iommu->reg + DMAR_GSTS_REG); + sts = readl(iommu->reg + DMAR_GSTS_REG); if (!(sts & DMA_GSTS_QIES)) goto end; diff --git a/drivers/iommu/intel_irq_remapping.c b/drivers/iommu/intel_irq_remapping.c index a55b207..153d3a7 100644 --- a/drivers/iommu/intel_irq_remapping.c +++ b/drivers/iommu/intel_irq_remapping.c @@ -543,7 +543,7 @@ static void iommu_disable_irq_remapping(struct intel_iommu *iommu) raw_spin_lock_irqsave(&iommu->register_lock, flags); - sts = dmar_readq(iommu->reg + DMAR_GSTS_REG); + sts = readl(iommu->reg + DMAR_GSTS_REG); if (!(sts & DMA_GSTS_IRES)) goto end;