Messages in this thread | | | Subject | Re: [PATCH V4 0/6] perf/amd/iommu: Enable multi-IOMMU support | From | Suravee Suthikulpanit <> | Date | Tue, 23 Feb 2016 18:39:04 +0700 |
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On 02/23/2016 06:27 PM, Suravee Suthikulpanit wrote: > Hi, > > On 02/23/2016 06:04 PM, Joerg Roedel wrote: >> 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 >> > > OK, I am spliting V5 into two part. First would be just to fix the > issue. Then the second part would be to add the multiple IOMMU support. > > Suravee
Actually, my V5 is rebased from tips which has moved several files. I think we might need to create a separate patch series to fix this issue in older kernels. Which branch should I rebase my changes for the older kernel?
Suravee
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