Re: [PATCH RFC v1 04/15] iommu/arm-smmu-v3: Update CD base address info for user-space
Hi Jean, On 3/3/21 10:44 PM, Jean-Philippe Brucker wrote: On Fri, Jan 15, 2021 at 05:43:31PM +0530, Vivek Gautam wrote: Update base address information in vendor pasid table info to pass that to user-space for stage1 table management. Signed-off-by: Vivek Gautam Cc: Joerg Roedel Cc: Will Deacon Cc: Robin Murphy Cc: Jean-Philippe Brucker Cc: Eric Auger Cc: Alex Williamson Cc: Kevin Tian Cc: Jacob Pan Cc: Liu Yi L Cc: Lorenzo Pieralisi Cc: Shameerali Kolothum Thodi --- 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; + This isn't the right place, because this path allocates second-level tables for two-level tables. I don't think we need pst_cfg->base at all, because for both linear and two-level tables, the base pointer is in cdcfg->cdtab_dma, which can be read directly. Sure, will remove this. Thanks, Jean 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 ___ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu
Re: [PATCH RFC v1 04/15] iommu/arm-smmu-v3: Update CD base address info for user-space
On Fri, Jan 15, 2021 at 05:43:31PM +0530, Vivek Gautam wrote: > Update base address information in vendor pasid table info to pass that > to user-space for stage1 table management. > > Signed-off-by: Vivek Gautam > Cc: Joerg Roedel > Cc: Will Deacon > Cc: Robin Murphy > Cc: Jean-Philippe Brucker > Cc: Eric Auger > Cc: Alex Williamson > Cc: Kevin Tian > Cc: Jacob Pan > Cc: Liu Yi L > Cc: Lorenzo Pieralisi > Cc: Shameerali Kolothum Thodi > --- > 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; > + This isn't the right place, because this path allocates second-level tables for two-level tables. I don't think we need pst_cfg->base at all, because for both linear and two-level tables, the base pointer is in cdcfg->cdtab_dma, which can be read directly. Thanks, Jean > 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 > ___ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu
[PATCH RFC v1 04/15] iommu/arm-smmu-v3: Update CD base address info for user-space
Update base address information in vendor pasid table info to pass that to user-space for stage1 table management. Signed-off-by: Vivek Gautam Cc: Joerg Roedel Cc: Will Deacon Cc: Robin Murphy Cc: Jean-Philippe Brucker Cc: Eric Auger Cc: Alex Williamson Cc: Kevin Tian Cc: Jacob Pan Cc: Liu Yi L Cc: Lorenzo Pieralisi Cc: Shameerali Kolothum Thodi --- 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 ___ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu
