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Message-Id: <20200418140910.8280-5-sashal@kernel.org>
Date: Sat, 18 Apr 2020 10:08:00 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc: Jacob Pan <jacob.jun.pan@...ux.intel.com>,
Lu Baolu <baolu.lu@...ux.intel.com>,
Liu Yi L <yi.l.liu@...el.com>,
Joerg Roedel <jroedel@...e.de>,
Sasha Levin <sashal@...nel.org>,
iommu@...ts.linux-foundation.org
Subject: [PATCH AUTOSEL 5.5 05/75] iommu/vt-d: Fix page request descriptor size
From: Jacob Pan <jacob.jun.pan@...ux.intel.com>
[ Upstream commit 52355fb1919ef7ed9a38e0f3de6e928de1f57217 ]
Intel VT-d might support PRS (Page Reqest Support) when it's
running in the scalable mode. Each page request descriptor
occupies 32 bytes and is 32-bytes aligned. The page request
descriptor offset mask should be 32-bytes aligned.
Fixes: 5b438f4ba315d ("iommu/vt-d: Support page request in scalable mode")
Signed-off-by: Lu Baolu <baolu.lu@...ux.intel.com>
Signed-off-by: Liu Yi L <yi.l.liu@...el.com>
Signed-off-by: Jacob Pan <jacob.jun.pan@...ux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@...e.de>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
drivers/iommu/intel-svm.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/iommu/intel-svm.c b/drivers/iommu/intel-svm.c
index 518d0b2d12afd..5313d043a6cf2 100644
--- a/drivers/iommu/intel-svm.c
+++ b/drivers/iommu/intel-svm.c
@@ -502,7 +502,7 @@ struct page_req_dsc {
u64 priv_data[2];
};
-#define PRQ_RING_MASK ((0x1000 << PRQ_ORDER) - 0x10)
+#define PRQ_RING_MASK ((0x1000 << PRQ_ORDER) - 0x20)
static bool access_error(struct vm_area_struct *vma, struct page_req_dsc *req)
{
--
2.20.1
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