On 5/9/26 12:08, Zhenzhong Duan wrote:
VFIO device will check flag VIOMMU_FLAG_PASID_SUPPORTED and expose PASID
capability, also check VIOMMU_FLAG_WANT_PASID_ATTACH to enable pasid
attachment, without those guest could not enable PASID of this device even
if vIOMMU's pasid is configured.
We don't expose the two flags when first stage is not configured as we
nit: s/first stage/fist stage translation/
don't support shadow page table on a PASID.
This is the final knob to enable PASID.
Signed-off-by: Zhenzhong Duan <[email protected]>
Tested-by: Xudong Hao <[email protected]>
---
hw/i386/intel_iommu.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c
index 6067069e02..70546e91d4 100644
--- a/hw/i386/intel_iommu.c
+++ b/hw/i386/intel_iommu.c
@@ -4788,6 +4788,11 @@ static uint64_t vtd_get_viommu_flags(void *opaque)
if (s->fsts) {
flags = VIOMMU_FLAG_WANT_NESTING_PARENT |
VIOMMU_FLAG_WANT_NESTING_DIRTY_TRACKING;
+
+ if (s->pasid) {
+ flags |= VIOMMU_FLAG_PASID_SUPPORTED |
+ VIOMMU_FLAG_WANT_PASID_ATTACH;
+ }
}
return flags;
Reviewed-by: Yi Liu <[email protected]>
