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iommu/amd: Fix the configuration of GCR3 table root pointer 

The SPA of the GCR3 table root pointer[51:31] masks 20 bits. However,
this requires 21 bits (Please see the AMD IOMMU specification).
This leads to the potential failure when the bit 51 of SPA of
the GCR3 table root pointer is 1'.

Signed-off-by: Adrian Huang <ahuang12@lenovo.com>
Fixes: 52815b7568 ("iommu/amd: Add support for IOMMUv2 domain mode")
Signed-off-by: Joerg Roedel <jroedel@suse.de>
alistair/sensors
Adrian Huang 2020-02-14 18:44:51 +08:00 committed by Joerg Roedel
parent f8788d86ab
commit c20f365346
1 changed files with 1 additions and 1 deletions
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2
drivers/iommu/amd_iommu_types.h
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@ -348,7 +348,7 @@
#define DTE_GCR3_VAL_A(x) (((x) >> 12) & 0x00007ULL)
#define DTE_GCR3_VAL_B(x) (((x) >> 15) & 0x0ffffULL)
#define DTE_GCR3_VAL_C(x) (((x) >> 31) & 0xfffffULL)
#define DTE_GCR3_VAL_C(x) (((x) >> 31) & 0x1fffffULL)
#define DTE_GCR3_INDEX_A 0
#define DTE_GCR3_INDEX_B 1