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Subject[PATCH V4 7/7] iommu/vt-d: Enable IOMMU perfmon support
Date
From: Kan Liang <kan.liang@linux.intel.com>

Register and enable an IOMMU perfmon for each active IOMMU device.

The failure of IOMMU perfmon registration doesn't impact other
functionalities of an IOMMU device.

Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
---
drivers/iommu/intel/dmar.c | 3 +++
drivers/iommu/intel/iommu.c | 3 +++
2 files changed, 6 insertions(+)

diff --git a/drivers/iommu/intel/dmar.c b/drivers/iommu/intel/dmar.c
index 43db6ebe8b57..6acfe879589c 100644
--- a/drivers/iommu/intel/dmar.c
+++ b/drivers/iommu/intel/dmar.c
@@ -1144,6 +1144,8 @@ static int alloc_iommu(struct dmar_drhd_unit *drhd)
err = iommu_device_register(&iommu->iommu, &intel_iommu_ops, NULL);
if (err)
goto err_sysfs;
+
+ iommu_pmu_register(iommu);
}

drhd->iommu = iommu;
@@ -1166,6 +1168,7 @@ static int alloc_iommu(struct dmar_drhd_unit *drhd)
static void free_iommu(struct intel_iommu *iommu)
{
if (intel_iommu_enabled && !iommu->drhd->ignored) {
+ iommu_pmu_unregister(iommu);
iommu_device_unregister(&iommu->iommu);
iommu_device_sysfs_remove(&iommu->iommu);
}
diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c
index e9221960e310..6a80d3848626 100644
--- a/drivers/iommu/intel/iommu.c
+++ b/drivers/iommu/intel/iommu.c
@@ -29,6 +29,7 @@
#include "../iommu-sva.h"
#include "pasid.h"
#include "cap_audit.h"
+#include "perfmon.h"

#define ROOT_SIZE VTD_PAGE_SIZE
#define CONTEXT_SIZE VTD_PAGE_SIZE
@@ -4013,6 +4014,8 @@ int __init intel_iommu_init(void)
intel_iommu_groups,
"%s", iommu->name);
iommu_device_register(&iommu->iommu, &intel_iommu_ops, NULL);
+
+ iommu_pmu_register(iommu);
}
up_read(&dmar_global_lock);

--
2.35.1
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