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intel_iommu: Make PASID-cache and PIOTLB type invalid in legacy mode 

In vtd_process_inv_desc(), VTD_INV_DESC_PC and VTD_INV_DESC_PIOTLB are
bypassed without scalable mode check. These two types are not valid
in legacy mode and we should report error.

Fixes: 4a4f219e8a ("intel_iommu: add scalable-mode option to make scalable mode work")
Suggested-by: Yi Liu <yi.l.liu@intel.com>
Signed-off-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
Reviewed-by: Clément Mathieu--Drif<clement.mathieu--drif@eviden.com>
Reviewed-by: Yi Liu <yi.l.liu@intel.com>
Message-Id: <20240814071321.2621384-3-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 15:13:20 +08:00 committed by Michael S. Tsirkin
parent 663168943d
commit 3b52cea829
1 changed files with 11 additions and 11 deletions
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22
hw/i386/intel_iommu.c
View File

@ -2763,17 +2763,6 @@ static bool vtd_process_inv_desc(IntelIOMMUState *s)
}
break;
/*
* TODO: the entity of below two cases will be implemented in future series.
* To make guest (which integrates scalable mode support patch set in
* iommu driver) work, just return true is enough so far.
*/
case VTD_INV_DESC_PC:
break;
case VTD_INV_DESC_PIOTLB:
break;
case VTD_INV_DESC_WAIT:
trace_vtd_inv_desc("wait", inv_desc.hi, inv_desc.lo);
if (!vtd_process_wait_desc(s, &inv_desc)) {
@ -2795,6 +2784,17 @@ static bool vtd_process_inv_desc(IntelIOMMUState *s)
}
break;
/*
* TODO: the entity of below two cases will be implemented in future series.
* To make guest (which integrates scalable mode support patch set in
* iommu driver) work, just return true is enough so far.
*/
case VTD_INV_DESC_PC:
case VTD_INV_DESC_PIOTLB:
if (s->scalable_mode) {
break;
}
/* fallthrough */
default:
error_report_once("%s: invalid inv desc: hi=%"PRIx64", lo=%"PRIx64
" (unknown type)", __func__, inv_desc.hi,