diff options
Diffstat (limited to 'drivers/iommu/intel/iommu.c')
| -rw-r--r-- | drivers/iommu/intel/iommu.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c index 956a02eb40b4..0ee5f1bd8af2 100644 --- a/drivers/iommu/intel/iommu.c +++ b/drivers/iommu/intel/iommu.c @@ -658,7 +658,14 @@ static int domain_update_iommu_snooping(struct intel_iommu *skip) rcu_read_lock(); for_each_active_iommu(iommu, drhd) { if (iommu != skip) { - if (!ecap_sc_support(iommu->ecap)) { + /* + * If the hardware is operating in the scalable mode, + * the snooping control is always supported since we + * always set PASID-table-entry.PGSNP bit if the domain + * is managed outside (UNMANAGED). + */ + if (!sm_supported(iommu) && + !ecap_sc_support(iommu->ecap)) { ret = 0; break; } @@ -2505,6 +2512,9 @@ static int domain_setup_first_level(struct intel_iommu *iommu, flags |= (level == 5) ? PASID_FLAG_FL5LP : 0; + if (domain->domain.type == IOMMU_DOMAIN_UNMANAGED) + flags |= PASID_FLAG_PAGE_SNOOP; + return intel_pasid_setup_first_level(iommu, dev, (pgd_t *)pgd, pasid, domain->iommu_did[iommu->seq_id], flags); |