* [PATCH 1/1] iommu/vt-d: Fix page request descriptor size
@ 2020-03-17 1:10 Lu Baolu
2020-03-19 14:10 ` Joerg Roedel
0 siblings, 1 reply; 2+ messages in thread
From: Lu Baolu @ 2020-03-17 1:10 UTC (permalink / raw)
To: Joerg Roedel; +Cc: kevin.tian, ashok.raj, linux-kernel, iommu
From: Jacob Pan <jacob.jun.pan@linux.intel.com>
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: Jacob Pan <jacob.jun.pan@linux.intel.com>
Signed-off-by: Liu Yi L <yi.l.liu@intel.com>
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
---
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 0e506de2d375..6183016f4269 100644
--- a/drivers/iommu/intel-svm.c
+++ b/drivers/iommu/intel-svm.c
@@ -491,7 +491,7 @@ 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)
{
--
2.17.1
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^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH 1/1] iommu/vt-d: Fix page request descriptor size
2020-03-17 1:10 [PATCH 1/1] iommu/vt-d: Fix page request descriptor size Lu Baolu
@ 2020-03-19 14:10 ` Joerg Roedel
0 siblings, 0 replies; 2+ messages in thread
From: Joerg Roedel @ 2020-03-19 14:10 UTC (permalink / raw)
To: Lu Baolu; +Cc: kevin.tian, ashok.raj, linux-kernel, iommu
On Tue, Mar 17, 2020 at 09:10:18AM +0800, Lu Baolu wrote:
> From: Jacob Pan <jacob.jun.pan@linux.intel.com>
>
> 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: Jacob Pan <jacob.jun.pan@linux.intel.com>
> Signed-off-by: Liu Yi L <yi.l.liu@intel.com>
> Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
> ---
> drivers/iommu/intel-svm.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
Applied, thanks.
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