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intel_iommu: Fix invalidation descriptor type field

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According to spec, invalidation descriptor type is 7bits which is
concatenation of bits[11:9] and bits[3:0] of invalidation descriptor.

Currently we only pick bits[3:0] as the invalidation type and treat
bits[11:9] as reserved zero. This is not a problem for now as bits[11:9]
is zero for all current invalidation types. But it will break if newer
type occupies bits[11:9].

Fix it by taking bits[11:9] into type and make reserved bits check accurate.

Suggested-by: Clément Mathieu--Drif<clement.mathieu--drif@eviden.com>
Signed-off-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
Reviewed-by: Yi Liu <yi.l.liu@intel.com>
Reviewed-by: Clément Mathieu--Drif<clement.mathieu--drif@eviden.com>
Message-Id: <20240814071321.2621384-2-zhenzhong.duan@intel.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Zhenzhong Duan 2024-08-14 15:13:19 +08:00 committed by Michael S. Tsirkin
parent e667485a80
commit 663168943d
2 changed files with 7 additions and 6 deletions
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2
hw/i386/intel_iommu.c
View File

@ -2744,7 +2744,7 @@ static bool vtd_process_inv_desc(IntelIOMMUState *s)
return false;
}
desc_type = inv_desc.lo & VTD_INV_DESC_TYPE;
desc_type = VTD_INV_DESC_TYPE(inv_desc.lo);
/* FIXME: should update at first or at last? */
s->iq_last_desc_type = desc_type;

11
hw/i386/intel_iommu_internal.h
View File

@ -356,7 +356,8 @@ union VTDInvDesc {
typedef union VTDInvDesc VTDInvDesc;
/* Masks for struct VTDInvDesc */
#define VTD_INV_DESC_TYPE 0xf
#define VTD_INV_DESC_TYPE(val) ((((val) >> 5) & 0x70ULL) | \
((val) & 0xfULL))
#define VTD_INV_DESC_CC 0x1 /* Context-cache Invalidate Desc */
#define VTD_INV_DESC_IOTLB 0x2
#define VTD_INV_DESC_DEVICE 0x3
@ -372,7 +373,7 @@ typedef union VTDInvDesc VTDInvDesc;
#define VTD_INV_DESC_WAIT_IF (1ULL << 4)
#define VTD_INV_DESC_WAIT_FN (1ULL << 6)
#define VTD_INV_DESC_WAIT_DATA_SHIFT 32
#define VTD_INV_DESC_WAIT_RSVD_LO 0Xffffff80ULL
#define VTD_INV_DESC_WAIT_RSVD_LO 0Xfffff180ULL
#define VTD_INV_DESC_WAIT_RSVD_HI 3ULL
/* Masks for Context-cache Invalidation Descriptor */
@ -383,7 +384,7 @@ typedef union VTDInvDesc VTDInvDesc;
#define VTD_INV_DESC_CC_DID(val) (((val) >> 16) & VTD_DOMAIN_ID_MASK)
#define VTD_INV_DESC_CC_SID(val) (((val) >> 32) & 0xffffUL)
#define VTD_INV_DESC_CC_FM(val) (((val) >> 48) & 3UL)
#define VTD_INV_DESC_CC_RSVD 0xfffc00000000ffc0ULL
#define VTD_INV_DESC_CC_RSVD 0xfffc00000000f1c0ULL
/* Masks for IOTLB Invalidate Descriptor */
#define VTD_INV_DESC_IOTLB_G (3ULL << 4)
@ -393,7 +394,7 @@ typedef union VTDInvDesc VTDInvDesc;
#define VTD_INV_DESC_IOTLB_DID(val) (((val) >> 16) & VTD_DOMAIN_ID_MASK)
#define VTD_INV_DESC_IOTLB_ADDR(val) ((val) & ~0xfffULL)
#define VTD_INV_DESC_IOTLB_AM(val) ((val) & 0x3fULL)
#define VTD_INV_DESC_IOTLB_RSVD_LO 0xffffffff0000ff00ULL
#define VTD_INV_DESC_IOTLB_RSVD_LO 0xffffffff0000f100ULL
#define VTD_INV_DESC_IOTLB_RSVD_HI 0xf80ULL
#define VTD_INV_DESC_IOTLB_PASID_PASID (2ULL << 4)
#define VTD_INV_DESC_IOTLB_PASID_PAGE (3ULL << 4)
@ -406,7 +407,7 @@ typedef union VTDInvDesc VTDInvDesc;
#define VTD_INV_DESC_DEVICE_IOTLB_SIZE(val) ((val) & 0x1)
#define VTD_INV_DESC_DEVICE_IOTLB_SID(val) (((val) >> 32) & 0xFFFFULL)
#define VTD_INV_DESC_DEVICE_IOTLB_RSVD_HI 0xffeULL
#define VTD_INV_DESC_DEVICE_IOTLB_RSVD_LO 0xffff0000ffe0fff8
#define VTD_INV_DESC_DEVICE_IOTLB_RSVD_LO 0xffff0000ffe0f1f0
/* Rsvd field masks for spte */
#define VTD_SPTE_SNP 0x800ULL