Kan Liang 586e19c88a iommu/vt-d: Retrieve IOMMU perfmon capability information ... [ Upstream commit a6a5006dad ] The performance monitoring infrastructure, perfmon, is to support collection of information about key events occurring during operation of the remapping hardware, to aid performance tuning and debug. Each remapping hardware unit has capability registers that indicate support for performance monitoring features and enumerate the capabilities. Add alloc_iommu_pmu() to retrieve IOMMU perfmon capability information for each iommu unit. The information is stored in the iommu->pmu data structure. Capability registers are read-only, so it's safe to prefetch and store them in the pmu structure. This could avoid unnecessary VMEXIT when this code is running in the virtualization environment. Add free_iommu_pmu() to free the saved capability information when freeing the iommu unit. Add a kernel config option for the IOMMU perfmon feature. Unless a user explicitly uses the perf tool to monitor the IOMMU perfmon event, there isn't any impact for the existing IOMMU. Enable it by default. Signed-off-by: Kan Liang <kan.liang@linux.intel.com> Link: https://lore.kernel.org/r/20230128200428.1459118-3-kan.liang@linux.intel.com Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com> Signed-off-by: Joerg Roedel <jroedel@suse.de> Stable-dep-of: 70bad345e6 ("iommu: Fix compilation without CONFIG_IOMMU_INTEL") Signed-off-by: Sasha Levin <sashal@kernel.org>		2024-03-26 18:20:41 -04:00
..
amd	iommu/amd: Mark interrupt as managed	2024-03-26 18:20:36 -04:00
arm	iommu/arm-smmu-qcom: Limit the SMR groups to 128	2024-03-06 14:45:06 +00:00
intel	iommu/vt-d: Retrieve IOMMU perfmon capability information	2024-03-26 18:20:41 -04:00
Kconfig	…
Makefile	…
apple-dart.c	iommu/dart: Fix apple_dart_device_group for PCI groups	2023-03-10 09:33:36 +01:00
dma-iommu.c	iommu/dma: Trace bounce buffer usage when mapping buffers	2024-01-25 15:27:43 -08:00
dma-iommu.h	…
exynos-iommu.c	…
fsl_pamu.c	…
fsl_pamu.h	…
fsl_pamu_domain.c	…
fsl_pamu_domain.h	…
hyperv-iommu.c	…
io-pgfault.c	mm: always expand the stack with the mmap write lock held	2023-07-01 13:16:25 +02:00
io-pgtable-arm-v7s.c	…
io-pgtable-arm.c	…
io-pgtable-arm.h	…
io-pgtable-dart.c	…
io-pgtable.c	…
ioasid.c	…
iommu-debugfs.c	…
iommu-sva-lib.c	…
iommu-sva-lib.h	…
iommu-sysfs.c	…
iommu-traces.c	…
iommu.c	iommu: Avoid more races around device probe	2023-12-13 18:39:17 +01:00
iova.c	iommu/iova: Fix alloc iova overflows issue	2023-01-18 11:58:20 +01:00
ipmmu-vmsa.c	…
irq_remapping.c	…
irq_remapping.h	…
msm_iommu.c	…
msm_iommu.h	…
msm_iommu_hw-8xxx.h	…
mtk_iommu.c	iommu/mediatek: Fix share pgtable for iova over 4GB	2023-10-10 22:00:41 +02:00
mtk_iommu_v1.c	iommu/mediatek-v1: Fix an error handling path in mtk_iommu_v1_probe()	2023-01-18 11:58:21 +01:00
of_iommu.c	iommu: Avoid more races around device probe	2023-12-13 18:39:17 +01:00
omap-iommu-debug.c	…
omap-iommu.c	…
omap-iommu.h	…
omap-iopgtable.h	…
rockchip-iommu.c	iommu: rockchip: Fix directory table address encoding	2023-09-13 09:42:50 +02:00
s390-iommu.c	…
sprd-iommu.c	iommu/sprd: Release dma buffer to avoid memory leak	2024-03-06 14:45:05 +00:00
sun50i-iommu.c	…
tegra-gart.c	…
tegra-smmu.c	…
virtio-iommu.c	iommu/virtio: Return size mapped for a detached domain	2023-07-19 16:21:20 +02:00