Re: [PATCH V4 0/6] perf/amd/iommu: Enable multi-IOMMU support

From	Joerg Roedel <joro@8bytes.org>
Newsgroups	linux.kernel
Subject	Re: [PATCH V4 0/6] perf/amd/iommu: Enable multi-IOMMU support
Date	2016-02-23 12:10 +0100
Message-ID	<r5j0S-4sa-9@gated-at.bofh.it> (permalink)
References	<r0VzP-6IR-5@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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Hi Suravee,

On Thu, Feb 11, 2016 at 04:15:21PM +0700, Suthikulpanit, Suravee wrote:
> From: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
> 
> This patch series modifies the existing perf_event_amd_iommu driver
> to support systems with multiple IOMMUs. It introduces new AMD IOMMU APIs,
> which are used by the AMD IOMMU Perf driver to access performance
> counters in multiple IOMMUs.
> 
> In addition, this series should also fix current AMD IOMMU PMU driver
> initialization issue in some existing KV and CZ platform, where it fails
> to write to IOMMU perf counter as reported by Andreas Hartmann here
> (http://comments.gmane.org/gmane.linux.kernel.pci/49147).

Since that problem also affects older kernels, we need a stand-alone
fix for this initialization issue. We can't backport new features to fix
bugs in old kernels.


	Joerg

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Re: [PATCH V4 0/6] perf/amd/iommu: Enable multi-IOMMU support Joerg Roedel <joro@8bytes.org> - 2016-02-23 12:10 +0100
  Re: [PATCH V4 0/6] perf/amd/iommu: Enable multi-IOMMU support Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com> - 2016-02-23 12:30 +0100
    Re: [PATCH V4 0/6] perf/amd/iommu: Enable multi-IOMMU support Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com> - 2016-02-23 12:40 +0100
      [PATCH] iommu/amd: Fix boot warning when device 00:00.0 is not iommu Joerg Roedel <joro@8bytes.org> - 2016-02-23 13:20 +0100

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