Implement IOMMU_INV_TYPE_TLB invalidations. When nr_pages is null we interpret this as a context invalidation.
Signed-off-by: Eric Auger <[email protected]> --- The user API needs to be refined to discriminate context invalidations from NH_VA invalidations. Also the leaf attribute is not yet properly handled. --- drivers/iommu/arm-smmu-v3.c | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+) diff --git a/drivers/iommu/arm-smmu-v3.c b/drivers/iommu/arm-smmu-v3.c index 26afafa..e4c7ae8 100644 --- a/drivers/iommu/arm-smmu-v3.c +++ b/drivers/iommu/arm-smmu-v3.c @@ -2101,6 +2101,39 @@ static void arm_smmu_unbind_guest_stage(struct iommu_domain *domain, spin_unlock_irqrestore(&smmu_domain->devices_lock, flags); } +static int arm_smmu_tlb_invalidate(struct iommu_domain *domain, + struct device *dev, + struct iommu_tlb_invalidate_info *inv_info) +{ + struct arm_smmu_domain *smmu_domain = to_smmu_domain(domain); + struct arm_smmu_device *smmu = smmu_domain->smmu; + size_t granule = 1 << (inv_info->size + 12); + + if (smmu_domain->stage != ARM_SMMU_DOMAIN_NESTED) + return -EINVAL; + + if (!smmu) + return -EINVAL; + + if (inv_info->hdr.type != IOMMU_INV_TYPE_TLB) + return -EINVAL; + + /* + * 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) { + arm_smmu_tlb_inv_context(smmu_domain); + } else { + arm_smmu_tlb_inv_range_nosync(inv_info->addr, + inv_info->nr_pages * granule, + granule, false, smmu_domain); + __arm_smmu_tlb_sync(smmu); + } + return 0; +} + static struct iommu_ops arm_smmu_ops = { .capable = arm_smmu_capable, .domain_alloc = arm_smmu_domain_alloc, @@ -2122,6 +2155,7 @@ static struct iommu_ops arm_smmu_ops = { .put_resv_regions = arm_smmu_put_resv_regions, .bind_guest_stage = arm_smmu_bind_guest_stage, .unbind_guest_stage = arm_smmu_unbind_guest_stage, + .tlb_invalidate = arm_smmu_tlb_invalidate, .pgsize_bitmap = -1UL, /* Restricted during device attach */ }; -- 2.5.5 _______________________________________________ iommu mailing list [email protected] https://lists.linuxfoundation.org/mailman/listinfo/iommu
