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iommu/vt-d: Enable IOMMU perfmon support

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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>
Link: https://lore.kernel.org/r/20230128200428.1459118-8-kan.liang@linux.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:
Kan Liang 2023-01-31 15:37:40 +08:00 committed by Joerg Roedel
parent 4a0d426565
commit d8a7c0cf05
2 changed files with 6 additions and 0 deletions
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3
drivers/iommu/intel/dmar.c
View File

@ -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 @@ error:
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);
}

3
drivers/iommu/intel/iommu.c
View File

@ -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
@ -4012,6 +4013,8 @@ 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);