diff options
Diffstat (limited to 'drivers/iommu/intel/pasid.c')
| -rw-r--r-- | drivers/iommu/intel/pasid.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/iommu/intel/pasid.c b/drivers/iommu/intel/pasid.c index 4754830610a6..8f2a702ce429 100644 --- a/drivers/iommu/intel/pasid.c +++ b/drivers/iommu/intel/pasid.c @@ -426,6 +426,16 @@ static inline void pasid_set_page_snoop(struct pasid_entry *pe, bool value) } /* + * Setup the Page Snoop (PGSNP) field (Bit 88) of a scalable mode + * PASID entry. + */ +static inline void +pasid_set_pgsnp(struct pasid_entry *pe) +{ + pasid_set_bits(&pe->val[1], 1ULL << 24, 1ULL << 24); +} + +/* * Setup the First Level Page table Pointer field (Bit 140~191) * of a scalable mode PASID entry. */ @@ -596,6 +606,9 @@ int intel_pasid_setup_first_level(struct intel_iommu *iommu, } } + if (flags & PASID_FLAG_PAGE_SNOOP) + pasid_set_pgsnp(pte); + pasid_set_domain_id(pte, did); pasid_set_address_width(pte, iommu->agaw); pasid_set_page_snoop(pte, !!ecap_smpwc(iommu->ecap)); @@ -674,6 +687,9 @@ int intel_pasid_setup_second_level(struct intel_iommu *iommu, pasid_set_fault_enable(pte); pasid_set_page_snoop(pte, !!ecap_smpwc(iommu->ecap)); + if (domain->domain.type == IOMMU_DOMAIN_UNMANAGED) + pasid_set_pgsnp(pte); + /* * Since it is a second level only translation setup, we should * set SRE bit as well (addresses are expected to be GPAs). |