Set bit PGSNP (Page Snoop, bit 88) in PASIDTE when attaching device to a domain whose cache coherency is enforced. Signed-off-by: Yan Zhao <yan.y.zhao@xxxxxxxxx> --- drivers/iommu/intel/pasid.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/iommu/intel/pasid.c b/drivers/iommu/intel/pasid.c index 74e8e4c17e814..a42955b5e666f 100644 --- a/drivers/iommu/intel/pasid.c +++ b/drivers/iommu/intel/pasid.c @@ -679,10 +679,11 @@ int intel_pasid_setup_second_level(struct intel_iommu *iommu, pasid_set_address_width(pte, agaw); pasid_set_translation_type(pte, PASID_ENTRY_PGTT_SL_ONLY); pasid_set_fault_enable(pte); + if (domain->force_snooping) + pasid_set_pgsnp(pte); pasid_set_page_snoop(pte, !!ecap_smpwc(iommu->ecap)); if (domain->dirty_tracking) pasid_set_ssade(pte); - pasid_set_present(pte); spin_unlock(&iommu->lock); -- 2.17.1
