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intel_iommu: allow queued invalidation for IR 

Queued invalidation is required for IR. This patch add basic support for
interrupt cache invalidate requests. Since we currently have no IR cache
implemented yet, we can just skip all interrupt cache invalidation
requests for now.

Signed-off-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Peter Xu 2016-07-14 13:56:15 +08:00 committed by Michael S. Tsirkin
parent d46114f9ec
commit b79104722f
2 changed files with 11 additions and 0 deletions
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9
hw/i386/intel_iommu.c
View File

@ -1404,6 +1404,15 @@ static bool vtd_process_inv_desc(IntelIOMMUState *s)
}
break;
case VTD_INV_DESC_IEC:
VTD_DPRINTF(INV, "Interrupt Entry Cache Invalidation "
"not implemented yet");
/*
* Since currently we do not cache interrupt entries, we can
* just mark this descriptor as "good" and move on.
*/
break;
default:
VTD_DPRINTF(GENERAL, "error: unkonw Invalidation Descriptor type "
"hi 0x%"PRIx64 " lo 0x%"PRIx64 " type %"PRIu8,

2
hw/i386/intel_iommu_internal.h
View File

@ -286,6 +286,8 @@ typedef struct VTDInvDesc VTDInvDesc;
#define VTD_INV_DESC_TYPE 0xf
#define VTD_INV_DESC_CC 0x1 /* Context-cache Invalidate Desc */
#define VTD_INV_DESC_IOTLB 0x2
#define VTD_INV_DESC_IEC 0x4 /* Interrupt Entry Cache
Invalidate Descriptor */
#define VTD_INV_DESC_WAIT 0x5 /* Invalidation Wait Descriptor */
#define VTD_INV_DESC_NONE 0 /* Not an Invalidate Descriptor */