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| author | Jingqi Liu <Jingqi.liu@intel.com> | 2024-04-24 15:16:30 +0800 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2024-04-26 11:57:38 +0200 |
| commit | cc9e49d35b4de47d6b656ac144cb22b11dc65c2e (patch) | |
| tree | f6bb606f07911f6eaf5297c2322fb146ece37b8e /drivers/iommu/intel/svm.c | |
| parent | d74169ceb0d2e32438946a2f1f9fc8c803304bd6 (diff) | |
| download | lwn-cc9e49d35b4de47d6b656ac144cb22b11dc65c2e.tar.gz lwn-cc9e49d35b4de47d6b656ac144cb22b11dc65c2e.zip | |
iommu/vt-d: Remove debugfs use of private data field
Since the page fault report and response have been tracked by ftrace, the
users can easily calculate the time used for a page fault handling. There's
no need to expose the similar functionality in debugfs. Hence, remove the
corresponding operations in debugfs.
Signed-off-by: Jingqi Liu <Jingqi.liu@intel.com>
Link: https://lore.kernel.org/r/20240308103811.76744-2-Jingqi.liu@intel.com
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu/intel/svm.c')
| -rw-r--r-- | drivers/iommu/intel/svm.c | 9 |
1 files changed, 0 insertions, 9 deletions
diff --git a/drivers/iommu/intel/svm.c b/drivers/iommu/intel/svm.c index ee3b469e2da1..e014350db354 100644 --- a/drivers/iommu/intel/svm.c +++ b/drivers/iommu/intel/svm.c @@ -583,12 +583,6 @@ static void intel_svm_prq_report(struct intel_iommu *iommu, struct device *dev, event.fault.prm.flags |= IOMMU_FAULT_PAGE_REQUEST_PRIV_DATA; event.fault.prm.private_data[0] = desc->priv_data[0]; event.fault.prm.private_data[1] = desc->priv_data[1]; - } else if (dmar_latency_enabled(iommu, DMAR_LATENCY_PRQ)) { - /* - * If the private data fields are not used by hardware, use it - * to monitor the prq handle latency. - */ - event.fault.prm.private_data[0] = ktime_to_ns(ktime_get()); } iommu_report_device_fault(dev, &event); @@ -768,9 +762,6 @@ void intel_svm_page_response(struct device *dev, struct iopf_fault *evt, if (private_present) { desc.qw2 = prm->private_data[0]; desc.qw3 = prm->private_data[1]; - } else if (prm->private_data[0]) { - dmar_latency_update(iommu, DMAR_LATENCY_PRQ, - ktime_to_ns(ktime_get()) - prm->private_data[0]); } qi_submit_sync(iommu, &desc, 1, 0); |