Messages in this thread | | | Date | Mon, 27 Jun 2022 12:01:05 +0100 | From | Will Deacon <> | Subject | Re: [PATCH 0/8] arm64/perf: Enable branch stack sampling |
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On Mon, Jun 13, 2022 at 03:31:11PM +0530, Anshuman Khandual wrote: > This series enables perf branch stack sampling support on arm64 platform > via a new arch feature called Branch Record Buffer Extension (BRBE). All > relevant register definitions could be accessed here. > > https://developer.arm.com/documentation/ddi0601/2021-12/AArch64-Registers > > This series applies on v5.19-rc2 after the BRBE related perf ABI changes series > (V6) that was posted earlier. > > https://lore.kernel.org/linux-arm-kernel/20220610035101.424112-1-anshuman.khandual@arm.com/ > > Following issues remain inconclusive > > - Jame's concerns regarding permission inadequacy related to perfmon_capable() > - Jame's concerns regarding using perf_event_paranoid along with perfmon_capable()
afaict, the capability stuff remains unresolved with the SPE driver, so I'd really like to see it fixed there first before we add more broken drivers.
https://lore.kernel.org/r/20220118100702.GB16547@willie-the-truck
Will
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