RE: [PATCH v2 7/8] iommu/arm-smmu-v3: Implement IOMMU_HWPT_ALLOC_NEST_PARENT
From: "Tian, Kevin" <kevin.tian@intel.com>
Date: 2024-08-30 07:59:26
Also in:
kvm, linux-acpi, linux-iommu, linux-patches
From: Jason Gunthorpe <jgg@nvidia.com> Sent: Tuesday, August 27, 2024 11:52 PM For SMMUv3 the parent must be a S2 domain, which can be composed into a IOMMU_DOMAIN_NESTED. In future the S2 parent will also need a VMID linked to the VIOMMU and even to KVM. Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>, with a nit:
quoted hunk ↗ jump to hunk
@@ -3103,7 +3103,8 @@ arm_smmu_domain_alloc_user(struct device *dev,u32 flags, const struct iommu_user_data *user_data) { struct arm_smmu_master *master = dev_iommu_priv_get(dev); - const u32 PAGING_FLAGS = IOMMU_HWPT_ALLOC_DIRTY_TRACKING; + const u32 PAGING_FLAGS = IOMMU_HWPT_ALLOC_DIRTY_TRACKING | + IOMMU_HWPT_ALLOC_NEST_PARENT;
lowercase for variable name.