Messages in this thread | | | Subject | Re: [PATCH v7 7/7] perf/amd/iommu: Enable support for multiple IOMMUs | From | Suravee Suthikulpanit <> | Date | Fri, 13 Jan 2017 17:24:01 +0700 |
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Boris,
On 1/13/17 00:52, Borislav Petkov wrote: > On Mon, Jan 09, 2017 at 09:33:47PM -0600, Suravee Suthikulpanit wrote: >> This patch adds multi-IOMMU support for perf by exposing >> an AMD IOMMU PMU for each IOMMU found in the system via: >> >> /sys/device/amd_iommu_x /* where x is the IOMMU index. */ > Straight into the top-level devices hierarchy? > > Why not add a proper hierarchy to > > /sys/devices/system/iommu/ ... > > ? > > Jörg, don't you have a sane iommu hierarchy already in sysfs? >
IIUC, Perf tools looks at the /sys/devices/xxxxx to identify availalble PMUs. Are you planning to have perf tools look at /sys/devices/system/iommu/xxx instead?
Suravee
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