From: Lu Baolu <baolu.lu@linux.intel.com>
To: Joerg Roedel <joro@8bytes.org>, Jason Gunthorpe <jgg@nvidia.com>,
Christoph Hellwig <hch@infradead.org>,
Kevin Tian <kevin.tian@intel.com>,
Ashok Raj <ashok.raj@intel.com>, Will Deacon <will@kernel.org>,
Robin Murphy <robin.murphy@arm.com>,
Jean-Philippe Brucker <jean-philippe@linaro.com>
Cc: linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org,
Jacob jun Pan <jacob.jun.pan@intel.com>
Subject: [PATCH RFC v2 07/11] arm-smmu-v3/sva: Add SVA domain support
Date: Tue, 29 Mar 2022 13:37:56 +0800 [thread overview]
Message-ID: <20220329053800.3049561-8-baolu.lu@linux.intel.com> (raw)
In-Reply-To: <20220329053800.3049561-1-baolu.lu@linux.intel.com>
Add support for SVA domain allocation and provide an SVA-specific
iommu_domain_ops.
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
---
drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h | 14 +++++++
.../iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c | 42 +++++++++++++++++++
drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 21 ++++++++++
3 files changed, 77 insertions(+)
diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h
index cd48590ada30..7631c00fdcbd 100644
--- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h
+++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h
@@ -759,6 +759,10 @@ struct iommu_sva *arm_smmu_sva_bind(struct device *dev, struct mm_struct *mm,
void arm_smmu_sva_unbind(struct iommu_sva *handle);
u32 arm_smmu_sva_get_pasid(struct iommu_sva *handle);
void arm_smmu_sva_notifier_synchronize(void);
+int arm_smmu_sva_attach_dev_pasid(struct iommu_domain *domain,
+ struct device *dev, ioasid_t id);
+void arm_smmu_sva_detach_dev_pasid(struct iommu_domain *domain,
+ struct device *dev, ioasid_t id);
#else /* CONFIG_ARM_SMMU_V3_SVA */
static inline bool arm_smmu_sva_supported(struct arm_smmu_device *smmu)
{
@@ -804,5 +808,15 @@ static inline u32 arm_smmu_sva_get_pasid(struct iommu_sva *handle)
}
static inline void arm_smmu_sva_notifier_synchronize(void) {}
+
+static inline int arm_smmu_sva_attach_dev_pasid(struct iommu_domain *domain,
+ struct device *dev, ioasid_t id)
+{
+ return -ENODEV;
+}
+
+static inline void arm_smmu_sva_detach_dev_pasid(struct iommu_domain *domain,
+ struct device *dev,
+ ioasid_t id) {}
#endif /* CONFIG_ARM_SMMU_V3_SVA */
#endif /* _ARM_SMMU_V3_H */
diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c
index 22ddd05bbdcd..ce229820086d 100644
--- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c
+++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c
@@ -534,3 +534,45 @@ void arm_smmu_sva_notifier_synchronize(void)
*/
mmu_notifier_synchronize();
}
+
+int arm_smmu_sva_attach_dev_pasid(struct iommu_domain *domain,
+ struct device *dev, ioasid_t id)
+{
+ int ret = 0;
+ struct iommu_sva *handle;
+ struct mm_struct *mm = iommu_sva_domain_mm(domain);
+
+ if (domain->type != IOMMU_DOMAIN_SVA || !mm)
+ return -EINVAL;
+
+ mutex_lock(&sva_lock);
+ handle = __arm_smmu_sva_bind(dev, mm);
+ if (IS_ERR(handle))
+ ret = PTR_ERR(handle);
+ mutex_unlock(&sva_lock);
+
+ return ret;
+}
+
+void arm_smmu_sva_detach_dev_pasid(struct iommu_domain *domain,
+ struct device *dev, ioasid_t id)
+{
+ struct arm_smmu_bond *bond = NULL, *t;
+ struct mm_struct *mm = iommu_sva_domain_mm(domain);
+ struct arm_smmu_master *master = dev_iommu_priv_get(dev);
+
+ mutex_lock(&sva_lock);
+ list_for_each_entry(t, &master->bonds, list) {
+ if (t->mm == mm) {
+ bond = t;
+ break;
+ }
+ }
+
+ if (!WARN_ON(!bond) && refcount_dec_and_test(&bond->refs)) {
+ list_del(&bond->list);
+ arm_smmu_mmu_notifier_put(bond->smmu_mn);
+ kfree(bond);
+ }
+ mutex_unlock(&sva_lock);
+}
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 afc63fce6107..bd80de0bad98 100644
--- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
+++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
@@ -1995,10 +1995,31 @@ static bool arm_smmu_capable(enum iommu_cap cap)
}
}
+static void arm_smmu_sva_domain_free(struct iommu_domain *domain)
+{
+ kfree(domain);
+}
+
+static const struct iommu_domain_ops arm_smmu_sva_domain_ops = {
+ .attach_dev_pasid = arm_smmu_sva_attach_dev_pasid,
+ .detach_dev_pasid = arm_smmu_sva_detach_dev_pasid,
+ .free = arm_smmu_sva_domain_free,
+};
+
static struct iommu_domain *arm_smmu_domain_alloc(unsigned type)
{
struct arm_smmu_domain *smmu_domain;
+ if (type == IOMMU_DOMAIN_SVA) {
+ struct iommu_domain *domain;
+
+ domain = kzalloc(sizeof(*domain), GFP_KERNEL);
+ if (domain)
+ domain->ops = &arm_smmu_sva_domain_ops;
+
+ return domain;
+ }
+
if (type != IOMMU_DOMAIN_UNMANAGED &&
type != IOMMU_DOMAIN_DMA &&
type != IOMMU_DOMAIN_DMA_FQ &&
--
2.25.1
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next prev parent reply other threads:[~2022-03-29 5:40 UTC|newest]
Thread overview: 62+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-29 5:37 [PATCH RFC v2 00/11] iommu: SVA and IOPF refactoring Lu Baolu
2022-03-29 5:37 ` [PATCH RFC v2 01/11] iommu: Add pasid_bits field in struct dev_iommu Lu Baolu
2022-03-29 21:00 ` Jacob Pan
2022-03-30 4:30 ` Lu Baolu
2022-03-30 7:05 ` Tian, Kevin
2022-03-30 11:58 ` Lu Baolu
2022-03-29 5:37 ` [PATCH RFC v2 02/11] iommu: Add iommu_group_singleton_lockdown() Lu Baolu
2022-03-29 8:42 ` Tian, Kevin
2022-03-29 11:42 ` Jason Gunthorpe via iommu
2022-03-30 6:50 ` Tian, Kevin
2022-03-30 11:57 ` Lu Baolu
2022-03-30 11:58 ` Jason Gunthorpe via iommu
2022-03-30 14:12 ` Tian, Kevin
2022-03-30 14:30 ` Jason Gunthorpe via iommu
2022-04-02 7:12 ` Tian, Kevin
2022-04-02 23:29 ` Jason Gunthorpe via iommu
2022-04-06 10:02 ` Lu Baolu
2022-04-06 10:44 ` Tian, Kevin
2022-04-06 11:03 ` Lu Baolu
2022-04-06 23:56 ` Tian, Kevin
2022-03-30 14:18 ` Tian, Kevin
2022-03-30 15:04 ` Alex Williamson
2022-04-04 5:43 ` Lu Baolu
2022-04-04 17:24 ` Jason Gunthorpe via iommu
2022-04-05 6:12 ` Lu Baolu
2022-04-05 14:10 ` Jason Gunthorpe via iommu
2022-04-06 9:51 ` Lu Baolu
2022-04-01 6:20 ` Yi Liu
2022-04-01 11:52 ` Jason Gunthorpe via iommu
2022-03-30 4:59 ` Lu Baolu
2022-03-30 6:55 ` Tian, Kevin
2022-04-01 5:49 ` Yi Liu
2022-03-29 5:37 ` [PATCH RFC v2 03/11] iommu/sva: Add iommu_domain type for SVA Lu Baolu
2022-03-29 21:38 ` Jacob Pan
2022-03-30 4:35 ` Lu Baolu
2022-03-30 19:02 ` Jason Gunthorpe via iommu
2022-04-02 8:43 ` Tian, Kevin
2022-04-02 23:32 ` Jason Gunthorpe via iommu
2022-04-04 6:09 ` Lu Baolu
2022-04-06 1:00 ` Tian, Kevin
2022-04-06 1:23 ` Jason Gunthorpe via iommu
2022-04-06 5:58 ` Tian, Kevin
2022-04-06 12:32 ` Robin Murphy
2022-04-06 13:06 ` Jason Gunthorpe via iommu
2022-04-06 13:37 ` Robin Murphy
2022-04-06 14:01 ` Jason Gunthorpe via iommu
2022-04-07 0:11 ` Tian, Kevin
2022-03-29 5:37 ` [PATCH RFC v2 04/11] iommu: Add attach/detach_dev_pasid domain ops Lu Baolu
2022-03-30 19:08 ` Jason Gunthorpe via iommu
2022-04-04 6:47 ` Lu Baolu
2022-03-29 5:37 ` [PATCH RFC v2 05/11] iommu/vt-d: Remove SVM_FLAG_SUPERVISOR_MODE suport Lu Baolu
2022-03-29 5:37 ` [PATCH RFC v2 06/11] iommu/vt-d: Add SVA domain support Lu Baolu
2022-03-30 19:09 ` Jason Gunthorpe via iommu
2022-04-04 6:52 ` Lu Baolu
2022-03-29 5:37 ` Lu Baolu [this message]
2022-03-29 5:37 ` [PATCH RFC v2 08/11] iommu/sva: Use attach/detach_pasid_dev in SVA interfaces Lu Baolu
2022-03-31 20:59 ` Jacob Pan
2022-03-31 22:26 ` Jason Gunthorpe via iommu
2022-04-04 5:55 ` Lu Baolu
2022-03-29 5:37 ` [PATCH RFC v2 09/11] iommu: Remove SVA related callbacks from iommu ops Lu Baolu
2022-03-29 5:37 ` [PATCH RFC v2 10/11] iommu: Per-domain I/O page fault handling Lu Baolu
2022-03-29 5:38 ` [PATCH RFC v2 11/11] iommu: Rename iommu-sva-lib.{c,h} Lu Baolu
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