Add support for SVA domain allocation and provide an SVA-specific
iommu_domain_ops.
Signed-off-by: Lu Baolu <baolu...@linux.intel.com>
---
include/linux/intel-iommu.h | 5 ++++
drivers/iommu/intel/iommu.c | 2 ++
drivers/iommu/intel/svm.c | 48 +++++++++++++++++++++++++++++++++++++
3 files changed, 55 insertions(+)
diff --git a/include/linux/intel-iommu.h b/include/linux/intel-iommu.h
index 72e5d7900e71..2397c2007cda 100644
--- a/include/linux/intel-iommu.h
+++ b/include/linux/intel-iommu.h
@@ -744,6 +744,7 @@ void intel_svm_unbind(struct iommu_sva *handle);
u32 intel_svm_get_pasid(struct iommu_sva *handle);
int intel_svm_page_response(struct device *dev, struct iommu_fault_event *evt,
struct iommu_page_response *msg);
+struct iommu_domain *intel_svm_domain_alloc(void);
struct intel_svm_dev {
struct list_head list;
@@ -769,6 +770,10 @@ struct intel_svm {
};
#else
static inline void intel_svm_check(struct intel_iommu *iommu) {}
+static inline struct iommu_domain *intel_svm_domain_alloc(void)
+{
+ return NULL;
+}
#endif
#ifdef CONFIG_INTEL_IOMMU_DEBUGFS
diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c
index 99643f897f26..10b1e9dcbd98 100644
--- a/drivers/iommu/intel/iommu.c
+++ b/drivers/iommu/intel/iommu.c
@@ -4343,6 +4343,8 @@ static struct iommu_domain
*intel_iommu_domain_alloc(unsigned type)
return domain;
case IOMMU_DOMAIN_IDENTITY:
return &si_domain->domain;
+ case IOMMU_DOMAIN_SVA:
+ return intel_svm_domain_alloc();
default:
return NULL;
}
diff --git a/drivers/iommu/intel/svm.c b/drivers/iommu/intel/svm.c
index 574ddddaa33a..641ab0491ada 100644
--- a/drivers/iommu/intel/svm.c
+++ b/drivers/iommu/intel/svm.c
@@ -931,3 +931,51 @@ int intel_svm_page_response(struct device *dev,
mutex_unlock(&pasid_mutex);
return ret;
}
+
+static int intel_svm_attach_dev_pasid(struct iommu_domain *domain,
+ struct device *dev, ioasid_t pasid)
+{
+ struct device_domain_info *info = dev_iommu_priv_get(dev);
+ struct intel_iommu *iommu = info->iommu;
+ struct mm_struct *mm = domain->mm;
+ struct iommu_sva *sva;
+ int ret = 0;
+
+ mutex_lock(&pasid_mutex);
+ sva = intel_svm_bind_mm(iommu, dev, mm);
+ if (IS_ERR(sva))
+ ret = PTR_ERR(sva);
+ mutex_unlock(&pasid_mutex);
+
+ return ret;
+}
+
+static void intel_svm_detach_dev_pasid(struct iommu_domain *domain,
+ struct device *dev, ioasid_t pasid)
+{
+ mutex_lock(&pasid_mutex);
+ intel_svm_unbind_mm(dev, pasid);
+ mutex_unlock(&pasid_mutex);
+}
+
+static void intel_svm_domain_free(struct iommu_domain *domain)
+{
+ kfree(domain);
+}
+
+static const struct iommu_domain_ops intel_svm_domain_ops = {
+ .attach_dev_pasid = intel_svm_attach_dev_pasid,
+ .detach_dev_pasid = intel_svm_detach_dev_pasid,
+ .free = intel_svm_domain_free,
+};
+
+struct iommu_domain *intel_svm_domain_alloc(void)
+{
+ struct iommu_domain *domain;
+
+ domain = kzalloc(sizeof(*domain), GFP_KERNEL);
+ if (domain)
+ domain->ops = &intel_svm_domain_ops;
+
+ return domain;
+}
--
2.25.1
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