Implement IOMMU_INV_TYPE_TLB invalidations. When
nr_pages is null we interpret this as a context
invalidation.
Signed-off-by: Eric Auger <eric.au...@redhat.com>
---
The user API needs to be refined to discriminate context
invalidations from NH_VA invalidations. Also the leaf attribute
is not yet properly handled.
v1 -> v2:
- properly pass the asid
---
drivers/iommu/arm-smmu-v3.c | 40 +++++++++++++++++++++++++++++++++++++
1 file changed, 40 insertions(+)
diff --git a/drivers/iommu/arm-smmu-v3.c b/drivers/iommu/arm-smmu-v3.c
index c7e05c0b93e1..4054da756a41 100644
--- a/drivers/iommu/arm-smmu-v3.c
+++ b/drivers/iommu/arm-smmu-v3.c
@@ -2251,6 +2251,45 @@ static void arm_smmu_unbind_pasid_table(struct
iommu_domain *domain)
mutex_unlock(&smmu_domain->init_mutex);
}
+static int
+arm_smmu_cache_invalidate(struct iommu_domain *domain, struct device *dev,
+ struct iommu_cache_invalidate_info *inv_info)
+{
+ struct arm_smmu_domain *smmu_domain = to_smmu_domain(domain);
+ struct arm_smmu_device *smmu = smmu_domain->smmu;
+
+ if (smmu_domain->stage != ARM_SMMU_DOMAIN_NESTED)
+ return -EINVAL;
+
+ if (!smmu)
+ return -EINVAL;
+
+ switch (inv_info->hdr.type) {
+ case IOMMU_INV_TYPE_TLB:
+ /*
+ * TODO: On context invalidation, the userspace sets nr_pages
+ * to 0. Refine the API to add a dedicated flags and also
+ * properly handle the leaf parameter.
+ */
+ if (!inv_info->nr_pages) {
+ smmu_domain->s1_cfg.cd.asid = inv_info->arch_id;
+ arm_smmu_tlb_inv_context(smmu_domain);
+ } else {
+ size_t granule = 1 << (inv_info->size + 12);
+ size_t size = inv_info->nr_pages * granule;
+
+ smmu_domain->s1_cfg.cd.asid = inv_info->arch_id;
+ arm_smmu_tlb_inv_range_nosync(inv_info->addr, size,
+ granule, false,
+ smmu_domain);
+ __arm_smmu_tlb_sync(smmu);
+ }
+ return 0;
+ default:
+ return -EINVAL;
+ }
+}
+
static struct iommu_ops arm_smmu_ops = {
.capable = arm_smmu_capable,
.domain_alloc = arm_smmu_domain_alloc,
@@ -2271,6 +2310,7 @@ static struct iommu_ops arm_smmu_ops = {
.put_resv_regions = arm_smmu_put_resv_regions,
.bind_pasid_table = arm_smmu_bind_pasid_table,
.unbind_pasid_table = arm_smmu_unbind_pasid_table,
+ .cache_invalidate = arm_smmu_cache_invalidate,
.pgsize_bitmap = -1UL, /* Restricted during device attach */
};
--
2.17.1
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