@@ -13,17 +13,4 @@
#define PRQ_RING_MASK ((0x1000 << PRQ_ORDER) - 0x20)
#define PRQ_DEPTH ((0x1000 << PRQ_ORDER) >> 5)
-/*
- * The SVM_FLAG_SUPERVISOR_MODE flag requests a PASID which can be used only
- * for access to kernel addresses. No IOTLB flushes are automatically done
- * for kernel mappings; it is valid only for access to the kernel's static
- * 1:1 mapping of physical memory — not to vmalloc or even module mappings.
- * A future API addition may permit the use of such ranges, by means of an
- * explicit IOTLB flush call (akin to the DMA API's unmap method).
- *
- * It is unlikely that we will ever hook into flush_tlb_kernel_range() to
- * do such IOTLB flushes automatically.
- */
-#define SVM_FLAG_SUPERVISOR_MODE BIT(0)
-
#endif /* __INTEL_SVM_H__ */
@@ -247,8 +247,7 @@ struct iommu_ops {
int (*dev_enable_feat)(struct device *dev, enum iommu_dev_features f);
int (*dev_disable_feat)(struct device *dev, enum iommu_dev_features f);
- struct iommu_sva *(*sva_bind)(struct device *dev, struct mm_struct *mm,
- void *drvdata);
+ struct iommu_sva *(*sva_bind)(struct device *dev, struct mm_struct *mm);
void (*sva_unbind)(struct iommu_sva *handle);
u32 (*sva_get_pasid)(struct iommu_sva *handle);
@@ -668,8 +667,7 @@ int iommu_dev_enable_feature(struct device *dev, enum iommu_dev_features f);
int iommu_dev_disable_feature(struct device *dev, enum iommu_dev_features f);
struct iommu_sva *iommu_sva_bind_device(struct device *dev,
- struct mm_struct *mm,
- void *drvdata);
+ struct mm_struct *mm);
void iommu_sva_unbind_device(struct iommu_sva *handle);
u32 iommu_sva_get_pasid(struct iommu_sva *handle);
@@ -1000,7 +998,7 @@ iommu_dev_disable_feature(struct device *dev, enum iommu_dev_features feat)
}
static inline struct iommu_sva *
-iommu_sva_bind_device(struct device *dev, struct mm_struct *mm, void *drvdata)
+iommu_sva_bind_device(struct device *dev, struct mm_struct *mm)
{
return NULL;
}
@@ -754,8 +754,7 @@ bool arm_smmu_master_sva_enabled(struct arm_smmu_master *master);
int arm_smmu_master_enable_sva(struct arm_smmu_master *master);
int arm_smmu_master_disable_sva(struct arm_smmu_master *master);
bool arm_smmu_master_iopf_supported(struct arm_smmu_master *master);
-struct iommu_sva *arm_smmu_sva_bind(struct device *dev, struct mm_struct *mm,
- void *drvdata);
+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);
@@ -791,7 +790,7 @@ static inline bool arm_smmu_master_iopf_supported(struct arm_smmu_master *master
}
static inline struct iommu_sva *
-arm_smmu_sva_bind(struct device *dev, struct mm_struct *mm, void *drvdata)
+arm_smmu_sva_bind(struct device *dev, struct mm_struct *mm)
{
return ERR_PTR(-ENODEV);
}
@@ -748,8 +748,7 @@ struct intel_iommu *device_to_iommu(struct device *dev, u8 *bus, u8 *devfn);
extern void intel_svm_check(struct intel_iommu *iommu);
extern int intel_svm_enable_prq(struct intel_iommu *iommu);
extern int intel_svm_finish_prq(struct intel_iommu *iommu);
-struct iommu_sva *intel_svm_bind(struct device *dev, struct mm_struct *mm,
- void *drvdata);
+struct iommu_sva *intel_svm_bind(struct device *dev, struct mm_struct *mm);
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,
@@ -6,7 +6,6 @@
#include <linux/pci.h>
#include <linux/device.h>
#include <linux/sched/task.h>
-#include <linux/intel-svm.h>
#include <linux/io-64-nonatomic-lo-hi.h>
#include <linux/cdev.h>
#include <linux/fs.h>
@@ -100,7 +99,7 @@ static int idxd_cdev_open(struct inode *inode, struct file *filp)
filp->private_data = ctx;
if (device_user_pasid_enabled(idxd)) {
- sva = iommu_sva_bind_device(dev, current->mm, NULL);
+ sva = iommu_sva_bind_device(dev, current->mm);
if (IS_ERR(sva)) {
rc = PTR_ERR(sva);
dev_err(dev, "pasid allocation failed: %d\n", rc);
@@ -14,7 +14,6 @@
#include <linux/io-64-nonatomic-lo-hi.h>
#include <linux/device.h>
#include <linux/idr.h>
-#include <linux/intel-svm.h>
#include <linux/iommu.h>
#include <uapi/linux/idxd.h>
#include <linux/dmaengine.h>
@@ -466,29 +465,7 @@ static struct idxd_device *idxd_alloc(struct pci_dev *pdev, struct idxd_driver_d
static int idxd_enable_system_pasid(struct idxd_device *idxd)
{
- int flags;
- unsigned int pasid;
- struct iommu_sva *sva;
-
- flags = SVM_FLAG_SUPERVISOR_MODE;
-
- sva = iommu_sva_bind_device(&idxd->pdev->dev, NULL, &flags);
- if (IS_ERR(sva)) {
- dev_warn(&idxd->pdev->dev,
- "iommu sva bind failed: %ld\n", PTR_ERR(sva));
- return PTR_ERR(sva);
- }
-
- pasid = iommu_sva_get_pasid(sva);
- if (pasid == IOMMU_PASID_INVALID) {
- iommu_sva_unbind_device(sva);
- return -ENODEV;
- }
-
- idxd->sva = sva;
- idxd->pasid = pasid;
- dev_dbg(&idxd->pdev->dev, "system pasid: %u\n", pasid);
- return 0;
+ return -EOPNOTSUPP;
}
static void idxd_disable_system_pasid(struct idxd_device *idxd)
@@ -367,8 +367,7 @@ __arm_smmu_sva_bind(struct device *dev, struct mm_struct *mm)
return ERR_PTR(ret);
}
-struct iommu_sva *
-arm_smmu_sva_bind(struct device *dev, struct mm_struct *mm, void *drvdata)
+struct iommu_sva *arm_smmu_sva_bind(struct device *dev, struct mm_struct *mm)
{
struct iommu_sva *handle;
struct iommu_domain *domain = iommu_get_domain_for_dev(dev);
@@ -296,8 +296,7 @@ static int pasid_to_svm_sdev(struct device *dev, unsigned int pasid,
return 0;
}
-static int intel_svm_alloc_pasid(struct device *dev, struct mm_struct *mm,
- unsigned int flags)
+static int intel_svm_alloc_pasid(struct device *dev, struct mm_struct *mm)
{
ioasid_t max_pasid = dev_is_pci(dev) ?
pci_max_pasids(to_pci_dev(dev)) : intel_pasid_max_id;
@@ -307,8 +306,7 @@ static int intel_svm_alloc_pasid(struct device *dev, struct mm_struct *mm,
static struct iommu_sva *intel_svm_bind_mm(struct intel_iommu *iommu,
struct device *dev,
- struct mm_struct *mm,
- unsigned int flags)
+ struct mm_struct *mm)
{
struct device_domain_info *info = dev_iommu_priv_get(dev);
struct intel_svm_dev *sdev;
@@ -324,22 +322,18 @@ static struct iommu_sva *intel_svm_bind_mm(struct intel_iommu *iommu,
svm->pasid = mm->pasid;
svm->mm = mm;
- svm->flags = flags;
INIT_LIST_HEAD_RCU(&svm->devs);
- if (!(flags & SVM_FLAG_SUPERVISOR_MODE)) {
- svm->notifier.ops = &intel_mmuops;
- ret = mmu_notifier_register(&svm->notifier, mm);
- if (ret) {
- kfree(svm);
- return ERR_PTR(ret);
- }
+ svm->notifier.ops = &intel_mmuops;
+ ret = mmu_notifier_register(&svm->notifier, mm);
+ if (ret) {
+ kfree(svm);
+ return ERR_PTR(ret);
}
ret = pasid_private_add(svm->pasid, svm);
if (ret) {
- if (svm->notifier.ops)
- mmu_notifier_unregister(&svm->notifier, mm);
+ mmu_notifier_unregister(&svm->notifier, mm);
kfree(svm);
return ERR_PTR(ret);
}
@@ -374,9 +368,7 @@ static struct iommu_sva *intel_svm_bind_mm(struct intel_iommu *iommu,
}
/* Setup the pasid table: */
- sflags = (flags & SVM_FLAG_SUPERVISOR_MODE) ?
- PASID_FLAG_SUPERVISOR_MODE : 0;
- sflags |= cpu_feature_enabled(X86_FEATURE_LA57) ? PASID_FLAG_FL5LP : 0;
+ sflags = cpu_feature_enabled(X86_FEATURE_LA57) ? PASID_FLAG_FL5LP : 0;
ret = intel_pasid_setup_first_level(iommu, dev, mm->pgd, mm->pasid,
FLPT_DEFAULT_DID, sflags);
if (ret)
@@ -390,8 +382,7 @@ static struct iommu_sva *intel_svm_bind_mm(struct intel_iommu *iommu,
kfree(sdev);
free_svm:
if (list_empty(&svm->devs)) {
- if (svm->notifier.ops)
- mmu_notifier_unregister(&svm->notifier, mm);
+ mmu_notifier_unregister(&svm->notifier, mm);
pasid_private_remove(mm->pasid);
kfree(svm);
}
@@ -780,40 +771,20 @@ static irqreturn_t prq_event_thread(int irq, void *d)
return IRQ_RETVAL(handled);
}
-struct iommu_sva *intel_svm_bind(struct device *dev, struct mm_struct *mm, void *drvdata)
+struct iommu_sva *intel_svm_bind(struct device *dev, struct mm_struct *mm)
{
struct intel_iommu *iommu = device_to_iommu(dev, NULL, NULL);
- unsigned int flags = 0;
struct iommu_sva *sva;
int ret;
- if (drvdata)
- flags = *(unsigned int *)drvdata;
-
- if (flags & SVM_FLAG_SUPERVISOR_MODE) {
- if (!ecap_srs(iommu->ecap)) {
- dev_err(dev, "%s: Supervisor PASID not supported\n",
- iommu->name);
- return ERR_PTR(-EOPNOTSUPP);
- }
-
- if (mm) {
- dev_err(dev, "%s: Supervisor PASID with user provided mm\n",
- iommu->name);
- return ERR_PTR(-EINVAL);
- }
-
- mm = &init_mm;
- }
-
mutex_lock(&pasid_mutex);
- ret = intel_svm_alloc_pasid(dev, mm, flags);
+ ret = intel_svm_alloc_pasid(dev, mm);
if (ret) {
mutex_unlock(&pasid_mutex);
return ERR_PTR(ret);
}
- sva = intel_svm_bind_mm(iommu, dev, mm, flags);
+ sva = intel_svm_bind_mm(iommu, dev, mm);
mutex_unlock(&pasid_mutex);
return sva;
@@ -2750,7 +2750,6 @@ EXPORT_SYMBOL_GPL(iommu_dev_disable_feature);
* iommu_sva_bind_device() - Bind a process address space to a device
* @dev: the device
* @mm: the mm to bind, caller must hold a reference to it
- * @drvdata: opaque data pointer to pass to bind callback
*
* Create a bond between device and address space, allowing the device to access
* the mm using the returned PASID. If a bond already exists between @device and
@@ -2763,7 +2762,7 @@ EXPORT_SYMBOL_GPL(iommu_dev_disable_feature);
* On error, returns an ERR_PTR value.
*/
struct iommu_sva *
-iommu_sva_bind_device(struct device *dev, struct mm_struct *mm, void *drvdata)
+iommu_sva_bind_device(struct device *dev, struct mm_struct *mm)
{
struct iommu_group *group;
struct iommu_sva *handle = ERR_PTR(-EINVAL);
@@ -2788,7 +2787,7 @@ iommu_sva_bind_device(struct device *dev, struct mm_struct *mm, void *drvdata)
if (iommu_group_device_count(group) != 1)
goto out_unlock;
- handle = ops->sva_bind(dev, mm, drvdata);
+ handle = ops->sva_bind(dev, mm);
out_unlock:
mutex_unlock(&group->mutex);
@@ -108,7 +108,7 @@ static int uacce_bind_queue(struct uacce_device *uacce, struct uacce_queue *q)
if (!(uacce->flags & UACCE_DEV_SVA))
return 0;
- handle = iommu_sva_bind_device(uacce->parent, current->mm, NULL);
+ handle = iommu_sva_bind_device(uacce->parent, current->mm);
if (IS_ERR(handle))
return PTR_ERR(handle);