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Message-Id: <20230128200428.1459118-8-kan.liang@linux.intel.com> Date: Sat, 28 Jan 2023 12:04:28 -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: yu-cheng.yu@...el.com, Kan Liang <kan.liang@...ux.intel.com> Subject: [PATCH V4 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 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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