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Message-Id: <20230118205006.3182907-8-kan.liang@linux.intel.com>
Date: Wed, 18 Jan 2023 12:50:06 -0800
From: kan.liang@...ux.intel.com
To: joro@...tes.org, will@...nel.org, baolu.lu@...ux.intel.com,
dwmw2@...radead.org, robin.murphy@....com, robert.moore@...el.com,
rafael.j.wysocki@...el.com, lenb@...nel.org, iommu@...ts.linux.dev,
linux-kernel@...r.kernel.org
Cc: Kan Liang <kan.liang@...ux.intel.com>
Subject: [PATCH V2 7/7] iommu/vt-d: Enable IOMMU perfmon support
From: Kan Liang <kan.liang@...ux.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@...ux.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 c557c61a28ee..2094f0592536 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 59df7e42fd53..c57e60c5f353 100644
--- a/drivers/iommu/intel/iommu.c
+++ b/drivers/iommu/intel/iommu.c
@@ -30,6 +30,7 @@
#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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