[PATCH RFC v1 04/15] iommu/arm-smmu-v3: Update CD base address info for user-space

Vivek Gautam
2021-01-15T12:15:02Z

Update base address information in vendor pasid table info to pass that
to user-space for stage1 table management.

Signed-off-by: Vivek Gautam <vivek.gautam@arm.com>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Robin Murphy <robin.murphy@arm.com>
Cc: Jean-Philippe Brucker <jean-philippe@linaro.org>
Cc: Eric Auger <eric.auger@redhat.com>
Cc: Alex Williamson <alex.williamson@redhat.com>
Cc: Kevin Tian <kevin.tian@intel.com>
Cc: Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: Liu Yi L <yi.l.liu@intel.com>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Shameerali Kolothum Thodi <shameerali.kolothum.thodi@huawei.com>
---
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