From: Eric Auger <eric.auger@redhat.com>
To: Nicolin Chen <nicolinc@nvidia.com>,
jgg@nvidia.com, robin.murphy@arm.com, will@kernel.org
Cc: kevin.tian@intel.com, baolu.lu@linux.intel.com, joro@8bytes.org,
shameerali.kolothum.thodi@huawei.com, jean-philippe@linaro.org,
linux-arm-kernel@lists.infradead.org, iommu@lists.linux.dev,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v1 11/14] iommu/arm-smmu-v3: Add arm_smmu_domain_alloc_user
Date: Fri, 24 Mar 2023 16:33:31 +0100 [thread overview]
Message-ID: <9700988d-ae86-06f7-33e6-f079722b63ff@redhat.com> (raw)
In-Reply-To: <7d26e897780bdc009b11bc0c0ddc7b755a769b24.1678348754.git.nicolinc@nvidia.com>
On 3/9/23 11:53, Nicolin Chen wrote:
> The arm_smmu_domain_alloc_user callback function is used for userspace to
> allocate iommu_domains, such as standalone stage-1 domain, nested stage-1
> domain, and nested stage-2 domain. The input user_data is in the type of
> struct iommu_hwpt_arm_smmuv3 that contains the configurations of a nested
> stage-1 or a nested stage-2 iommu_domain. A NULL user_data will just opt
> in a standalone stage-1 domain allocation.
>
> Add a constitutive function __arm_smmu_domain_alloc to support that.
>
> Since ops->domain_alloc_user has a valid dev pointer, the master pointer
> is available when calling __arm_smmu_domain_alloc() in this case, meaning
> that arm_smmu_domain_finalise() can be done at the allocation stage. This
> allows IOMMUFD to initialize the hw_pagetable for the domain.
>
> Signed-off-by: Nicolin Chen <nicolinc@nvidia.com>
> ---
> drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 95 ++++++++++++++-------
> 1 file changed, 65 insertions(+), 30 deletions(-)
>
> 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 2d29f7320570..5ff74edfbd68 100644
> --- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
> +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
> @@ -2053,36 +2053,6 @@ static void *arm_smmu_hw_info(struct device *dev, u32 *length)
> return info;
> }
>
> -static struct iommu_domain *arm_smmu_domain_alloc(unsigned type)
> -{
> - struct arm_smmu_domain *smmu_domain;
> -
> - if (type == IOMMU_DOMAIN_SVA)
> - return arm_smmu_sva_domain_alloc();
> -
> - if (type != IOMMU_DOMAIN_UNMANAGED &&
> - type != IOMMU_DOMAIN_DMA &&
> - type != IOMMU_DOMAIN_DMA_FQ &&
> - type != IOMMU_DOMAIN_IDENTITY)
> - return NULL;
> -
> - /*
> - * Allocate the domain and initialise some of its data structures.
> - * We can't really do anything meaningful until we've added a
> - * master.
> - */
> - smmu_domain = kzalloc(sizeof(*smmu_domain), GFP_KERNEL);
> - if (!smmu_domain)
> - return NULL;
> -
> - mutex_init(&smmu_domain->init_mutex);
> - INIT_LIST_HEAD(&smmu_domain->devices);
> - spin_lock_init(&smmu_domain->devices_lock);
> - INIT_LIST_HEAD(&smmu_domain->mmu_notifiers);
> -
> - return &smmu_domain->domain;
> -}
> -
> static struct iommu_domain *arm_smmu_get_unmanaged_domain(struct device *dev)
> {
> struct arm_smmu_master *master = dev_iommu_priv_get(dev);
> @@ -2893,10 +2863,75 @@ static void arm_smmu_remove_dev_pasid(struct device *dev, ioasid_t pasid)
> arm_smmu_sva_remove_dev_pasid(domain, dev, pasid);
> }
>
> +static struct iommu_domain *
> +__arm_smmu_domain_alloc(unsigned type,
> + struct arm_smmu_domain *s2,
I think you should rather introduce s2 param in "iommu/arm-smmu-v3:
Support IOMMU_DOMAIN_NESTED type of allocations" because it is not use
at all in this patch nor really explained in the commit msg
Thanks
Eric
> + struct arm_smmu_master *master,
> + const struct iommu_hwpt_arm_smmuv3 *user_cfg)
> +{
> + struct arm_smmu_domain *smmu_domain;
> + struct iommu_domain *domain;
> + int ret = 0;
> +
> + if (type == IOMMU_DOMAIN_SVA)
> + return arm_smmu_sva_domain_alloc();
> +
> + if (type != IOMMU_DOMAIN_UNMANAGED &&
> + type != IOMMU_DOMAIN_DMA &&
> + type != IOMMU_DOMAIN_DMA_FQ &&
> + type != IOMMU_DOMAIN_IDENTITY)
> + return NULL;
> +
> + /*
> + * Allocate the domain and initialise some of its data structures.
> + * We can't really finalise the domain unless a master is given.
> + */
> + smmu_domain = kzalloc(sizeof(*smmu_domain), GFP_KERNEL);
> + if (!smmu_domain)
> + return NULL;
> + domain = &smmu_domain->domain;
> +
> + domain->type = type;
> + domain->ops = arm_smmu_ops.default_domain_ops;
> +
> + mutex_init(&smmu_domain->init_mutex);
> + INIT_LIST_HEAD(&smmu_domain->devices);
> + spin_lock_init(&smmu_domain->devices_lock);
> + INIT_LIST_HEAD(&smmu_domain->mmu_notifiers);
> +
> + if (master) {
> + smmu_domain->smmu = master->smmu;
> + ret = arm_smmu_domain_finalise(domain, master, user_cfg);
> + if (ret) {
> + kfree(smmu_domain);
> + return NULL;
> + }
> + }
> +
> + return domain;
> +}
> +
> +static struct iommu_domain *arm_smmu_domain_alloc(unsigned type)
> +{
> + return __arm_smmu_domain_alloc(type, NULL, NULL, NULL);
> +}
> +
> +static struct iommu_domain *
> +arm_smmu_domain_alloc_user(struct device *dev, struct iommu_domain *parent,
> + const void *user_data)
> +{
> + const struct iommu_hwpt_arm_smmuv3 *user_cfg = user_data;
> + struct arm_smmu_master *master = dev_iommu_priv_get(dev);
> + unsigned type = IOMMU_DOMAIN_UNMANAGED;
> +
> + return __arm_smmu_domain_alloc(type, NULL, master, user_cfg);
> +}
> +
> static struct iommu_ops arm_smmu_ops = {
> .capable = arm_smmu_capable,
> .hw_info = arm_smmu_hw_info,
> .domain_alloc = arm_smmu_domain_alloc,
> + .domain_alloc_user = arm_smmu_domain_alloc_user,
> .get_unmanaged_domain = arm_smmu_get_unmanaged_domain,
> .probe_device = arm_smmu_probe_device,
> .release_device = arm_smmu_release_device,
next prev parent reply other threads:[~2023-03-24 15:34 UTC|newest]
Thread overview: 165+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-09 10:53 [PATCH v1 00/14] Add Nested Translation Support for SMMUv3 Nicolin Chen
2023-03-09 10:53 ` [PATCH v1 01/14] iommu: Add iommu_get_unmanaged_domain helper Nicolin Chen
2023-03-09 12:51 ` Robin Murphy
2023-03-09 14:19 ` Jason Gunthorpe
2023-03-09 19:04 ` Robin Murphy
2023-03-10 0:23 ` Jason Gunthorpe
2023-03-10 8:41 ` Eric Auger
2023-03-10 15:55 ` Jason Gunthorpe
2023-03-16 1:21 ` Nicolin Chen
2023-03-16 18:42 ` Robin Murphy
2023-03-16 20:01 ` Nicolin Chen
2023-03-20 12:51 ` Jason Gunthorpe
2023-03-10 10:14 ` Eric Auger
2023-03-10 15:33 ` Jason Gunthorpe
2023-03-10 15:44 ` Shameerali Kolothum Thodi
2023-03-10 15:56 ` Jason Gunthorpe
2023-03-10 16:07 ` Shameerali Kolothum Thodi
2023-03-10 16:21 ` Jason Gunthorpe
2023-03-10 16:30 ` Shameerali Kolothum Thodi
2023-03-10 17:03 ` Jason Gunthorpe
2023-03-22 16:07 ` Eric Auger
2023-03-22 17:02 ` Jason Gunthorpe
2023-03-22 17:41 ` Eric Auger
2023-03-22 18:07 ` Jason Gunthorpe
2023-03-16 19:51 ` Nicolin Chen
2023-03-16 19:56 ` Shameerali Kolothum Thodi
2023-03-22 15:44 ` Eric Auger
2023-03-09 10:53 ` [PATCH v1 02/14] iommufd: Add nesting related data structures for ARM SMMUv3 Nicolin Chen
2023-03-09 13:42 ` Jean-Philippe Brucker
2023-03-09 14:48 ` Jason Gunthorpe
2023-03-09 18:26 ` Jean-Philippe Brucker
2023-03-09 21:01 ` Jason Gunthorpe
2023-03-10 12:16 ` Jean-Philippe Brucker
2023-03-10 14:52 ` Robin Murphy
2023-03-10 15:25 ` Jason Gunthorpe
2023-03-10 15:57 ` Robin Murphy
2023-03-10 16:03 ` Jason Gunthorpe
2023-03-17 10:10 ` Tian, Kevin
2023-03-17 10:04 ` Tian, Kevin
2023-03-10 4:50 ` Nicolin Chen
2023-03-10 12:54 ` Jean-Philippe Brucker
2023-03-10 14:00 ` Jason Gunthorpe
2023-03-10 16:06 ` Jason Gunthorpe
2023-03-16 0:59 ` Nicolin Chen
2023-03-09 15:26 ` Shameerali Kolothum Thodi
2023-03-09 15:40 ` Jason Gunthorpe
2023-03-09 15:51 ` Shameerali Kolothum Thodi
2023-03-09 15:59 ` Jason Gunthorpe
2023-03-09 16:07 ` Shameerali Kolothum Thodi
2023-03-10 5:26 ` Nicolin Chen
2023-03-10 5:36 ` Nicolin Chen
2023-03-10 12:55 ` Jason Gunthorpe
2023-03-10 5:18 ` Nicolin Chen
2023-03-10 5:04 ` Nicolin Chen
2023-03-10 11:33 ` Eric Auger
2023-03-10 12:51 ` Jason Gunthorpe
2023-03-17 10:17 ` Tian, Kevin
2023-03-09 10:53 ` [PATCH v1 03/14] iommufd/device: Setup MSI on kernel-managed domains Nicolin Chen
2023-03-10 16:45 ` Eric Auger
2023-03-11 0:17 ` Nicolin Chen
2023-03-09 10:53 ` [PATCH v1 04/14] iommu/arm-smmu-v3: Add arm_smmu_hw_info Nicolin Chen
2023-03-09 13:03 ` Robin Murphy
2023-03-10 1:17 ` Nicolin Chen
2023-03-10 15:28 ` Robin Murphy
2023-03-16 0:13 ` Nicolin Chen
2023-03-16 15:19 ` Robin Murphy
2023-03-16 20:06 ` Nicolin Chen
2023-04-12 7:47 ` Nicolin Chen
2023-03-09 10:53 ` [PATCH v1 05/14] iommu/arm-smmu-v3: Remove ARM_SMMU_DOMAIN_NESTED Nicolin Chen
2023-03-10 16:39 ` Eric Auger
2023-03-10 17:05 ` Jason Gunthorpe
2023-03-11 0:24 ` Nicolin Chen
2023-03-11 0:23 ` Nicolin Chen
2023-03-09 10:53 ` [PATCH v1 06/14] iommu/arm-smmu-v3: Unset corresponding STE fields when s2_cfg is NULL Nicolin Chen
2023-03-09 13:13 ` Robin Murphy
2023-03-09 18:24 ` Shameerali Kolothum Thodi
2023-03-10 1:54 ` Nicolin Chen
2023-03-09 10:53 ` [PATCH v1 07/14] iommu/arm-smmu-v3: Add STRTAB_STE_0_CFG_NESTED for 2-stage translation Nicolin Chen
2023-03-09 10:53 ` [PATCH v1 08/14] iommu/arm-smmu-v3: Prepare for nested domain support Nicolin Chen
2023-03-10 20:39 ` Robin Murphy
2023-03-11 12:40 ` Nicolin Chen
2023-03-09 10:53 ` [PATCH v1 09/14] iommu/arm-smmu-v3: Implement arm_smmu_get_unmanaged_domain Nicolin Chen
2023-03-09 10:53 ` [PATCH v1 10/14] iommu/arm-smmu-v3: Pass in user_cfg to arm_smmu_domain_finalise Nicolin Chen
2023-03-09 10:53 ` [PATCH v1 11/14] iommu/arm-smmu-v3: Add arm_smmu_domain_alloc_user Nicolin Chen
2023-03-24 15:28 ` Eric Auger
2023-03-24 17:40 ` Nicolin Chen
2023-03-24 17:50 ` Jason Gunthorpe
2023-03-24 18:00 ` Nicolin Chen
2023-03-24 15:33 ` Eric Auger [this message]
2023-03-24 17:43 ` Nicolin Chen
2023-03-09 10:53 ` [PATCH v1 12/14] iommu/arm-smmu-v3: Support IOMMU_DOMAIN_NESTED type of allocations Nicolin Chen
2023-03-09 13:20 ` Robin Murphy
2023-03-09 14:28 ` Robin Murphy
2023-03-10 1:34 ` Nicolin Chen
2023-03-24 15:44 ` Eric Auger
2023-03-24 16:30 ` Jason Gunthorpe
2023-03-24 17:50 ` Nicolin Chen
2023-03-24 17:51 ` Jason Gunthorpe
2023-03-24 17:55 ` Nicolin Chen
2023-03-09 10:53 ` [PATCH v1 13/14] iommu/arm-smmu-v3: Add CMDQ_OP_TLBI_NH_VAA and CMDQ_OP_TLBI_NH_ALL Nicolin Chen
2023-03-09 13:44 ` Robin Murphy
2023-03-10 1:19 ` Nicolin Chen
2023-03-09 10:53 ` [PATCH v1 14/14] iommu/arm-smmu-v3: Add arm_smmu_cache_invalidate_user Nicolin Chen
2023-03-09 14:49 ` Robin Murphy
2023-03-09 15:31 ` Jason Gunthorpe
2023-03-10 4:20 ` Nicolin Chen
2023-03-10 16:19 ` Jason Gunthorpe
2023-03-11 11:56 ` Nicolin Chen
2023-03-11 12:53 ` Nicolin Chen
2023-03-20 13:03 ` Jason Gunthorpe
2023-03-20 15:56 ` Nicolin Chen
2023-03-20 16:04 ` Jason Gunthorpe
2023-03-20 16:59 ` Nicolin Chen
2023-03-20 18:45 ` Jason Gunthorpe
2023-03-20 21:22 ` Nicolin Chen
2023-03-20 22:19 ` Jason Gunthorpe
2023-03-22 20:57 ` Nicolin Chen
2023-03-23 12:17 ` Jason Gunthorpe
2023-03-17 9:41 ` Tian, Kevin
2023-03-17 14:24 ` Nicolin Chen
2023-03-20 12:59 ` Jason Gunthorpe
2023-03-20 16:12 ` Nicolin Chen
2023-03-20 18:00 ` Jason Gunthorpe
2023-03-21 8:34 ` Tian, Kevin
2023-03-21 11:48 ` Jason Gunthorpe
2023-03-22 6:42 ` Nicolin Chen
2023-03-22 12:43 ` Jason Gunthorpe
2023-03-22 17:11 ` Nicolin Chen
2023-03-22 17:28 ` Jason Gunthorpe
2023-03-22 19:21 ` Nicolin Chen
2023-03-22 19:41 ` Jason Gunthorpe
2023-03-22 20:43 ` Nicolin Chen
2023-03-23 12:16 ` Jason Gunthorpe
2023-03-23 18:13 ` Nicolin Chen
2023-03-23 18:27 ` Jason Gunthorpe
2023-03-24 9:02 ` Tian, Kevin
2023-03-24 14:57 ` Jason Gunthorpe
2023-03-24 17:35 ` Nicolin Chen
2023-03-28 3:03 ` Tian, Kevin
2023-03-24 8:47 ` Tian, Kevin
2023-03-24 14:44 ` Jason Gunthorpe
2023-03-28 2:48 ` Tian, Kevin
2023-03-28 12:26 ` Jason Gunthorpe
2023-03-31 8:09 ` Tian, Kevin
2023-03-17 9:24 ` Tian, Kevin
2023-03-10 3:51 ` Nicolin Chen
2023-03-10 17:53 ` Robin Murphy
2023-03-10 18:49 ` Jason Gunthorpe
2023-03-11 12:38 ` Nicolin Chen
2023-03-13 13:07 ` Robin Murphy
2023-03-16 0:01 ` Nicolin Chen
2023-03-16 14:58 ` Robin Murphy
2023-03-16 21:09 ` Nicolin Chen
2023-03-20 1:32 ` Nicolin Chen
2023-03-20 13:11 ` Jason Gunthorpe
2023-03-20 15:28 ` Nicolin Chen
2023-03-20 16:01 ` Jason Gunthorpe
2023-03-20 16:35 ` Nicolin Chen
2023-03-20 18:07 ` Jason Gunthorpe
2023-03-20 20:46 ` Nicolin Chen
2023-03-20 22:14 ` Jason Gunthorpe
2023-03-22 5:14 ` Nicolin Chen
2023-03-24 8:55 ` Tian, Kevin
2023-03-17 9:47 ` Tian, Kevin
2023-03-17 14:16 ` Nicolin Chen
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