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iommu/vt-d: Remove debugfs use of private data field

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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>
This commit is contained in:
Jingqi Liu 2024-04-24 15:16:30 +08:00 committed by Joerg Roedel
parent d74169ceb0
commit cc9e49d35b
3 changed files with 0 additions and 17 deletions
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7
drivers/iommu/intel/debugfs.c
View File

@ -706,7 +706,6 @@ static ssize_t dmar_perf_latency_write(struct file *filp,
dmar_latency_disable(iommu, DMAR_LATENCY_INV_IOTLB);
dmar_latency_disable(iommu, DMAR_LATENCY_INV_DEVTLB);
dmar_latency_disable(iommu, DMAR_LATENCY_INV_IEC);
dmar_latency_disable(iommu, DMAR_LATENCY_PRQ);
}
rcu_read_unlock();
break;
@ -728,12 +727,6 @@ static ssize_t dmar_perf_latency_write(struct file *filp,
dmar_latency_enable(iommu, DMAR_LATENCY_INV_IEC);
rcu_read_unlock();
break;
case 4:
rcu_read_lock();
for_each_active_iommu(iommu, drhd)
dmar_latency_enable(iommu, DMAR_LATENCY_PRQ);
rcu_read_unlock();
break;
default:
return -EINVAL;
}

1
drivers/iommu/intel/perf.h
View File

@ -11,7 +11,6 @@ enum latency_type {
DMAR_LATENCY_INV_IOTLB = 0,
DMAR_LATENCY_INV_DEVTLB,
DMAR_LATENCY_INV_IEC,
DMAR_LATENCY_PRQ,
DMAR_LATENCY_NUM
};

9
drivers/iommu/intel/svm.c
View File

@ -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);