[PATCH v3 19/19] iommu/arm-smmu-v3: Convert to domain_alloc_paging()
Jason Gunthorpe
jgg at nvidia.com
Tue Dec 5 11:14:51 PST 2023
Now that the BLOCKED and IDENTITY behaviors are managed with their own
domains change to the domain_alloc_paging() op.
For now SVA remains using the old interface, eventually it will get its
own op that can pass in the device and mm_struct which will let us have a
sane lifetime for the mmu_notifier.
Call arm_smmu_domain_finalise() early if dev is available.
Tested-by: Shameer Kolothum <shameerali.kolothum.thodi at huawei.com>
Tested-by: Nicolin Chen <nicolinc at nvidia.com>
Reviewed-by: Nicolin Chen <nicolinc at nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg at nvidia.com>
---
drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 18 ++++++++++++++----
1 file changed, 14 insertions(+), 4 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 873343109a90bb..f3900a3d52524a 100644
--- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
+++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
@@ -2169,14 +2169,15 @@ static bool arm_smmu_capable(struct device *dev, enum iommu_cap cap)
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();
+ return NULL;
+}
- if (type != IOMMU_DOMAIN_UNMANAGED &&
- type != IOMMU_DOMAIN_DMA)
- return NULL;
+static struct iommu_domain *arm_smmu_domain_alloc_paging(struct device *dev)
+{
+ struct arm_smmu_domain *smmu_domain;
/*
* Allocate the domain and initialise some of its data structures.
@@ -2192,6 +2193,14 @@ static struct iommu_domain *arm_smmu_domain_alloc(unsigned type)
spin_lock_init(&smmu_domain->devices_lock);
INIT_LIST_HEAD(&smmu_domain->mmu_notifiers);
+ if (dev) {
+ struct arm_smmu_master *master = dev_iommu_priv_get(dev);
+
+ if (arm_smmu_domain_finalise(smmu_domain, master->smmu)) {
+ kfree(smmu_domain);
+ return NULL;
+ }
+ }
return &smmu_domain->domain;
}
@@ -3059,6 +3068,7 @@ static struct iommu_ops arm_smmu_ops = {
.blocked_domain = &arm_smmu_blocked_domain,
.capable = arm_smmu_capable,
.domain_alloc = arm_smmu_domain_alloc,
+ .domain_alloc_paging = arm_smmu_domain_alloc_paging,
.probe_device = arm_smmu_probe_device,
.release_device = arm_smmu_release_device,
.device_group = arm_smmu_device_group,
--
2.43.0
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