iommu/arm-smmu-v3: Add a global static BLOCKED domain

Using the same design as the IDENTITY domain install an
STRTAB_STE_0_CFG_ABORT STE.

Reviewed-by: Michael Shavit <mshavit@google.com>
Reviewed-by: Nicolin Chen <nicolinc@nvidia.com>
Tested-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
Tested-by: Nicolin Chen <nicolinc@nvidia.com>
Tested-by: Moritz Fischer <moritzf@google.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/13-v6-96275f25c39d+2d4-smmuv3_newapi_p1_jgg@nvidia.com
Signed-off-by: Will Deacon <will@kernel.org>

diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
index 842ff8a95baa1293dfbc24cdd446f94989ce1206..baec827e6ae446a24439d326e5c822ad6702fdad 100644 (file)
--- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
+++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
@@ -2674,6 +2674,24 @@ static struct iommu_domain arm_smmu_identity_domain = {
        .ops = &arm_smmu_identity_ops,
 };
 
+static int arm_smmu_attach_dev_blocked(struct iommu_domain *domain,
+                                       struct device *dev)
+{
+       struct arm_smmu_ste ste;
+
+       arm_smmu_make_abort_ste(&ste);
+       return arm_smmu_attach_dev_ste(dev, &ste);
+}
+
+static const struct iommu_domain_ops arm_smmu_blocked_ops = {
+       .attach_dev = arm_smmu_attach_dev_blocked,
+};
+
+static struct iommu_domain arm_smmu_blocked_domain = {
+       .type = IOMMU_DOMAIN_BLOCKED,
+       .ops = &arm_smmu_blocked_ops,
+};
+
 static int arm_smmu_map_pages(struct iommu_domain *domain, unsigned long iova,
                              phys_addr_t paddr, size_t pgsize, size_t pgcount,
                              int prot, gfp_t gfp, size_t *mapped)
@@ -3064,6 +3082,7 @@ static void arm_smmu_remove_dev_pasid(struct device *dev, ioasid_t pasid)
 
 static struct iommu_ops arm_smmu_ops = {
        .identity_domain        = &arm_smmu_identity_domain,
+       .blocked_domain         = &arm_smmu_blocked_domain,
        .capable                = arm_smmu_capable,
        .domain_alloc           = arm_smmu_domain_alloc,
        .probe_device           = arm_smmu_probe_device,