| From e4d63181942f6ef237dfda0cd2c486a465e30cb3 Mon Sep 17 00:00:00 2001 |
| From: Jacob Pan <jacob.jun.pan@linux.intel.com> |
| Date: Tue, 17 Mar 2020 09:10:18 +0800 |
| Subject: [PATCH] iommu/vt-d: Fix page request descriptor size |
| |
| commit 52355fb1919ef7ed9a38e0f3de6e928de1f57217 upstream. |
| |
| 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@linux.intel.com> |
| Signed-off-by: Liu Yi L <yi.l.liu@intel.com> |
| Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com> |
| Signed-off-by: Joerg Roedel <jroedel@suse.de> |
| Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> |
| |
| diff --git a/drivers/iommu/intel-svm.c b/drivers/iommu/intel-svm.c |
| index 8bcf5167b2eb..7f9a8de9ce6b 100644 |
| --- a/drivers/iommu/intel-svm.c |
| +++ b/drivers/iommu/intel-svm.c |
| @@ -487,7 +487,7 @@ 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) |
| { |
| -- |
| 2.7.4 |
| |
