From beee685e5432e13bab61b096859fca9189ba23b9 Mon Sep 17 00:00:00 2001 From: Kunkun Jiang Date: Thu, 15 Jul 2021 11:00:23 +0800 Subject: [PATCH] iommu/arm-smmu-v3: Realize sync_dirty_log iommu ops virt inclusion category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I3ZUKK CVE: NA ------------------------------ This realizes sync_dirty_log iommu ops based on sync_dirty_log io-pgtable ops. Co-developed-by: Keqian Zhu Signed-off-by: Kunkun Jiang Reviewed-by: Keqian Zhu Signed-off-by: Zheng Zengkai --- drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 30 +++++++++++++++++++++ 1 file changed, 30 insertions(+) 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 167ddb0b9498..540d1c9566dc 100644 --- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c @@ -3154,6 +3154,35 @@ static int arm_smmu_switch_dirty_log(struct iommu_domain *domain, bool enable, return 0; } +static int arm_smmu_sync_dirty_log(struct iommu_domain *domain, + unsigned long iova, size_t size, + unsigned long *bitmap, + unsigned long base_iova, + unsigned long bitmap_pgshift) +{ + struct arm_smmu_domain *smmu_domain = to_smmu_domain(domain); + struct io_pgtable_ops *ops = smmu_domain->pgtbl_ops; + struct arm_smmu_device *smmu = smmu_domain->smmu; + + if (!(smmu->features & ARM_SMMU_FEAT_HD)) + return -ENODEV; + if (smmu_domain->stage != ARM_SMMU_DOMAIN_S1) + return -EINVAL; + + if (!ops || !ops->sync_dirty_log) { + pr_err("io-pgtable don't realize sync dirty log\n"); + return -ENODEV; + } + + /* + * Flush iotlb to ensure all inflight transactions are completed. + * See doc IHI0070Da 3.13.4 "HTTU behavior summary". + */ + arm_smmu_flush_iotlb_all(domain); + return ops->sync_dirty_log(ops, iova, size, bitmap, base_iova, + bitmap_pgshift); +} + static int arm_smmu_of_xlate(struct device *dev, struct of_phandle_args *args) { return iommu_fwspec_add_ids(dev, args->args, 1); @@ -3392,6 +3421,7 @@ static struct iommu_ops arm_smmu_ops = { .domain_get_attr = arm_smmu_domain_get_attr, .domain_set_attr = arm_smmu_domain_set_attr, .switch_dirty_log = arm_smmu_switch_dirty_log, + .sync_dirty_log = arm_smmu_sync_dirty_log, .of_xlate = arm_smmu_of_xlate, .get_resv_regions = arm_smmu_get_resv_regions, .put_resv_regions = generic_iommu_put_resv_regions, -- GitLab