[PATCH RFC v1 04/15] iommu/arm-smmu-v3: Update CD base address info for user-space
From: Vivek Gautam <hidden>
Date: 2021-01-15 12:15:02
Also in:
linux-iommu, lkml
Subsystem:
arm smmu drivers, iommu subsystem, the rest · Maintainers:
Will Deacon, Joerg Roedel, Linus Torvalds
Update base address information in vendor pasid table info to pass that to user-space for stage1 table management. Signed-off-by: Vivek Gautam <redacted> Cc: Joerg Roedel <joro@8bytes.org> Cc: Will Deacon <redacted> Cc: Robin Murphy <robin.murphy@arm.com> Cc: Jean-Philippe Brucker <redacted> Cc: Eric Auger <eric.auger@redhat.com> Cc: Alex Williamson <redacted> Cc: Kevin Tian <kevin.tian@intel.com> Cc: Jacob Pan <redacted> Cc: Liu Yi L <redacted> Cc: Lorenzo Pieralisi <redacted> Cc: Shameerali Kolothum Thodi <redacted> --- drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-cd-lib.c | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-cd-lib.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-cd-lib.c
index 8a7187534706..ec37476c8d09 100644
--- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-cd-lib.c
+++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-cd-lib.c@@ -55,6 +55,9 @@ static __le64 *arm_smmu_get_cd_ptr(struct iommu_vendor_psdtable_cfg *pst_cfg, if (arm_smmu_alloc_cd_leaf_table(dev, l1_desc)) return NULL; + if (s1cfg->s1fmt == STRTAB_STE_0_S1FMT_LINEAR) + pst_cfg->base = l1_desc->l2ptr_dma; + l1ptr = cdcfg->cdtab + idx * CTXDESC_L1_DESC_DWORDS; arm_smmu_write_cd_l1_desc(l1ptr, l1_desc); /* An invalid L1CD can be cached */
@@ -211,6 +214,9 @@ static int arm_smmu_alloc_cd_tables(struct iommu_vendor_psdtable_cfg *pst_cfg) goto err_free_l1; } + if (s1cfg->s1fmt == STRTAB_STE_0_S1FMT_64K_L2) + pst_cfg->base = cdcfg->cdtab_dma; + return 0; err_free_l1:
--
2.17.1
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