diff options
| author | Fenghua Yu <fenghua.yu@intel.com> | 2021-10-14 13:38:37 +0800 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2021-10-18 12:31:48 +0200 |
| commit | 00ecd5401349a5e23d2ad768a23b110030165fac (patch) | |
| tree | fed542c8b39ef02826ceeab9026356ce3cc1b90c /drivers/iommu | |
| parent | 94f797ad61d337945d90911e6ad09edf2a82b92a (diff) | |
iommu/vt-d: Clean up unused PASID updating functions
update_pasid() and its call chain are currently unused in the tree because
Thomas disabled the ENQCMD feature. The feature will be re-enabled shortly
using a different approach and update_pasid() and its call chain will not
be used in the new approach.
Remove the useless functions.
Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Reviewed-by: Tony Luck <tony.luck@intel.com>
Link: https://lore.kernel.org/r/20210920192349.2602141-1-fenghua.yu@intel.com
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Link: https://lore.kernel.org/r/20211014053839.727419-8-baolu.lu@linux.intel.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu')
| -rw-r--r-- | drivers/iommu/intel/svm.c | 24 |
1 files changed, 1 insertions, 23 deletions
diff --git a/drivers/iommu/intel/svm.c b/drivers/iommu/intel/svm.c index 0c228787704f..5b5d69b04fcc 100644 --- a/drivers/iommu/intel/svm.c +++ b/drivers/iommu/intel/svm.c @@ -505,21 +505,6 @@ out: return ret; } -static void _load_pasid(void *unused) -{ - update_pasid(); -} - -static void load_pasid(struct mm_struct *mm, u32 pasid) -{ - mutex_lock(&mm->context.lock); - - /* Update PASID MSR on all CPUs running the mm's tasks. */ - on_each_cpu_mask(mm_cpumask(mm), _load_pasid, NULL, true); - - mutex_unlock(&mm->context.lock); -} - static int intel_svm_alloc_pasid(struct device *dev, struct mm_struct *mm, unsigned int flags) { @@ -614,10 +599,6 @@ static struct iommu_sva *intel_svm_bind_mm(struct intel_iommu *iommu, if (ret) goto free_sdev; - /* The newly allocated pasid is loaded to the mm. */ - if (!(flags & SVM_FLAG_SUPERVISOR_MODE) && list_empty(&svm->devs)) - load_pasid(mm, svm->pasid); - list_add_rcu(&sdev->list, &svm->devs); success: return &sdev->sva; @@ -670,11 +651,8 @@ static int intel_svm_unbind_mm(struct device *dev, u32 pasid) kfree_rcu(sdev, rcu); if (list_empty(&svm->devs)) { - if (svm->notifier.ops) { + if (svm->notifier.ops) mmu_notifier_unregister(&svm->notifier, mm); - /* Clear mm's pasid. */ - load_pasid(mm, PASID_DISABLED); - } pasid_private_remove(svm->pasid); /* We mandate that no page faults may be outstanding * for the PASID when intel_svm_unbind_mm() is called. |