* [Qemu-devel] [PATCH] intel_iommu: fix incorrect mask for IOTLB invalidate desc
@ 2016-04-11 3:00 Peter Xu
2016-04-11 5:12 ` Peter Xu
0 siblings, 1 reply; 2+ messages in thread
From: Peter Xu @ 2016-04-11 3:00 UTC (permalink / raw)
To: qemu-devel; +Cc: mst, pbonzini, rth, ehabkost, peterx
Address Mask (AM) should be 6 bits long, not 7. (vt-d spec 6.5.2.3)
Signed-off-by: Peter Xu <peterx@redhat.com>
---
hw/i386/intel_iommu_internal.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/hw/i386/intel_iommu_internal.h b/hw/i386/intel_iommu_internal.h
index e5f514c..db7da18 100644
--- a/hw/i386/intel_iommu_internal.h
+++ b/hw/i386/intel_iommu_internal.h
@@ -315,7 +315,7 @@ typedef struct VTDInvDesc VTDInvDesc;
#define VTD_INV_DESC_IOTLB_DID(val) (((val) >> 16) & VTD_DOMAIN_ID_MASK)
#define VTD_INV_DESC_IOTLB_ADDR(val) ((val) & ~0xfffULL & \
((1ULL << VTD_MGAW) - 1))
-#define VTD_INV_DESC_IOTLB_AM(val) ((val) & 0x3fULL)
+#define VTD_INV_DESC_IOTLB_AM(val) ((val) & 0x2fULL)
#define VTD_INV_DESC_IOTLB_RSVD_LO 0xffffffff0000ff00ULL
#define VTD_INV_DESC_IOTLB_RSVD_HI 0xf80ULL
--
2.4.3
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