From: Jason Gunthorpe jgg@nvidia.com
mainline inclusion from mainline-v6.9-rc1 commit 327e10b47ae99f76ac53f0b8b73a0539f390d2d2 category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/IB4WDJ CVE: NA
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i...
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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@huawei.com Tested-by: Nicolin Chen nicolinc@nvidia.com Tested-by: Moritz Fischer moritzf@google.com Reviewed-by: Nicolin Chen nicolinc@nvidia.com Signed-off-by: Jason Gunthorpe jgg@nvidia.com Link: https://lore.kernel.org/r/16-v6-96275f25c39d+2d4-smmuv3_newapi_p1_jgg@nvidia... Signed-off-by: Will Deacon will@kernel.org Signed-off-by: Kunkun Jiang jiangkunkun@huawei.com --- drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 22 ++++++++++++++++----- 1 file changed, 17 insertions(+), 5 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 7ef4d2120072..a45dfc7aeea9 100644 --- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c @@ -2418,14 +2418,15 @@ 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 ERR_PTR(-EOPNOTSUPP); +}
- 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. @@ -2434,13 +2435,23 @@ static struct iommu_domain *arm_smmu_domain_alloc(unsigned type) */ smmu_domain = kzalloc(sizeof(*smmu_domain), GFP_KERNEL); if (!smmu_domain) - return NULL; + return ERR_PTR(-ENOMEM);
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 (dev) { + struct arm_smmu_master *master = dev_iommu_priv_get(dev); + int ret; + + ret = arm_smmu_domain_finalise(smmu_domain, master->smmu); + if (ret) { + kfree(smmu_domain); + return ERR_PTR(ret); + } + } return &smmu_domain->domain; }
@@ -3548,6 +3559,7 @@ 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,