From: Jean-Philippe Brucker <jean-philippe@linaro.org>
To: Vivek Gautam <vivek.gautam@arm.com>
Cc: linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
iommu@lists.linux-foundation.org,
virtualization@lists.linux-foundation.org, joro@8bytes.org,
will.deacon@arm.com, mst@redhat.com, robin.murphy@arm.com,
eric.auger@redhat.com, alex.williamson@redhat.com,
kevin.tian@intel.com, jacob.jun.pan@linux.intel.com,
yi.l.liu@intel.com, lorenzo.pieralisi@arm.com,
shameerali.kolothum.thodi@huawei.com
Subject: Re: [PATCH RFC v1 04/15] iommu/arm-smmu-v3: Update CD base address info for user-space
Date: Wed, 3 Mar 2021 18:14:28 +0100 [thread overview]
Message-ID: <YD/D9HJxH9L503an@myrica> (raw)
In-Reply-To: <20210115121342.15093-5-vivek.gautam@arm.com>
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 <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;
> +
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
>
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next prev parent reply other threads:[~2021-03-04 0:05 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-15 12:13 [PATCH RFC v1 00/15] iommu/virtio: Nested stage support with Arm Vivek Gautam
2021-01-15 12:13 ` [PATCH RFC v1 01/15] iommu/arm-smmu-v3: Create a Context Descriptor library Vivek Gautam
2021-01-15 12:13 ` [PATCH RFC v1 02/15] iommu: Add a simple PASID table library Vivek Gautam
2021-03-03 17:11 ` Jean-Philippe Brucker
2021-03-12 12:47 ` Vivek Kumar Gautam
2021-03-29 16:25 ` Jean-Philippe Brucker
2021-01-15 12:13 ` [PATCH RFC v1 03/15] iommu/arm-smmu-v3: Update drivers to work with iommu-pasid-table Vivek Gautam
2021-01-15 12:13 ` [PATCH RFC v1 04/15] iommu/arm-smmu-v3: Update CD base address info for user-space Vivek Gautam
2021-03-03 17:14 ` Jean-Philippe Brucker [this message]
2021-03-12 12:31 ` Vivek Kumar Gautam
2021-01-15 12:13 ` [PATCH RFC v1 05/15] iommu/arm-smmu-v3: Set sync op from consumer driver of cd-lib Vivek Gautam
2021-03-03 17:15 ` Jean-Philippe Brucker
2021-03-12 12:49 ` Vivek Kumar Gautam
2021-01-15 12:13 ` [PATCH RFC v1 06/15] iommu/virtio: Add headers for table format probing Vivek Gautam
2021-03-03 17:17 ` Jean-Philippe Brucker
2021-03-12 12:54 ` Vivek Kumar Gautam
2021-01-15 12:13 ` [PATCH RFC v1 07/15] iommu/virtio: Add " Vivek Gautam
2021-01-15 12:13 ` [PATCH RFC v1 08/15] iommu: Add asid_bits to arm smmu-v3 stage1 table info Vivek Gautam
2021-03-03 17:18 ` Jean-Philippe Brucker
2021-03-12 12:57 ` Vivek Kumar Gautam
2021-01-15 12:13 ` [PATCH RFC v1 09/15] iommu/virtio: Update table format probing header Vivek Gautam
2021-03-03 17:21 ` Jean-Philippe Brucker
2021-03-12 12:58 ` Vivek Kumar Gautam
2021-01-15 12:13 ` [PATCH RFC v1 10/15] iommu/virtio: Prepare to add attach pasid table infrastructure Vivek Gautam
2021-01-15 12:13 ` [PATCH RFC v1 11/15] iommu/virtio: Add headers for binding pasid table in iommu Vivek Gautam
2021-01-15 12:13 ` [PATCH RFC v1 12/15] iommu/virtio: Add support for INVALIDATE request Vivek Gautam
2021-03-03 18:28 ` Jacob Pan
2021-03-04 5:58 ` Tian, Kevin
2021-03-04 6:16 ` Vivek Kumar Gautam
2021-01-15 12:13 ` [PATCH RFC v1 13/15] iommu/virtio: Attach Arm PASID tables when available Vivek Gautam
2021-03-03 17:25 ` Jean-Philippe Brucker
2021-03-12 13:29 ` Vivek Kumar Gautam
2021-03-29 16:21 ` Jean-Philippe Brucker
2021-01-15 12:13 ` [PATCH RFC v1 14/15] iommu/virtio: Add support for Arm LPAE page table format Vivek Gautam
2021-01-15 12:13 ` [PATCH RFC v1 15/15] iommu/virtio: Update fault type and reason info for viommu fault Vivek Gautam
2021-03-03 17:25 ` Jean-Philippe Brucker
2021-03-12 13:09 ` Vivek Kumar Gautam
2021-03-29 16:23 ` Jean-Philippe Brucker
2021-04-06 6:24 ` Vivek Kumar Gautam
2021-01-19 9:03 ` [PATCH RFC v1 00/15] iommu/virtio: Nested stage support with Arm Auger Eric
2021-01-21 17:34 ` Vivek Kumar Gautam
2021-01-22 15:49 ` Shameerali Kolothum Thodi
2021-01-25 12:55 ` Vivek Kumar Gautam
2021-01-25 8:43 ` Auger Eric
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