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SubjectRe: [PATCH 0/3] AMD IOMMUv2 Performance Counter patches
On Mon, Jan 21, 2013 at 02:20:55PM -0600, Steven L. Kinney wrote:
> From: "Steven L. Kinney" <steven.kinney@amd.com>
>
> These patches implement the AMD IOMMUv2.5 Performance Counter functionality
> via custom perf PMU and implement static counting for various IOMMU
> translations. The patches address three areas of functionality:
>
> 1) Add a PCI quirk for the enablement of IOMMUv2 EFR PC within a specific
> AMD family/model in which BIOS has not enabled. Based on code
> implemented by Andreas Herrmann at AMD Dresden.
> 2) Extend the AMD IOMMU initialization to include IOMMUv2 PC enablement
> and access to IOMMUv2 counter registers. For all AMD family/models
> that implement IOMMUv2.5 functionality.
> 3) Code the perf IOMMUv2 PMU to manage IOMMUv2 perf events, which call
> the function(s) extending the AMD IOMMU core driver. For all AMD
> family/models that implement IOMMUv2.5 functionality.
>
> The command-line, to invoke the iommuv2 PMU, is:
>
> perf stat -e iommuv2/config=[data],config1=[data]/{u,r} [command]
>
> For information regarding AMD IOMMU v2.5 PC configuration, see the public
> specification.

Is there a name for it? I see
http://support.amd.com/us/Processor_TechDocs/48882.pdf
but that looks to be for v2.0?
>
> Steven L. Kinney (3):
> AMD x86 quirks: Quirk for enabling IOMMUv2 PC feature
> AMD IOMMUv2 PC resource management hooks
> AMD IOMMUv2 PC perf PMU implementation
>
> arch/x86/kernel/cpu/Makefile | 1 +
> arch/x86/kernel/cpu/perf_event_amd_iommuv2.c | 429 ++++++++++++++++++++++++++
> arch/x86/kernel/cpu/perf_event_amd_iommuv2.h | 42 +++
> arch/x86/kernel/quirks.c | 17 +
> drivers/iommu/Kconfig | 10 +
> drivers/iommu/amd_iommu_init.c | 99 ++++++
> drivers/iommu/amd_iommu_types.h | 12 +
> include/linux/pci_ids.h | 2 +
> 8 files changed, 612 insertions(+)
> create mode 100644 arch/x86/kernel/cpu/perf_event_amd_iommuv2.c
> create mode 100644 arch/x86/kernel/cpu/perf_event_amd_iommuv2.h
>
> --
> 1.7.9.5
>
>
> _______________________________________________
> iommu mailing list
> iommu@lists.linux-foundation.org
> https://lists.linuxfoundation.org/mailman/listinfo/iommu


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