lkml.org 
[lkml]   [2022]   [Jun]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 0/8] arm64/perf: Enable branch stack sampling
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

\
 
 \ /
  Last update: 2022-06-27 13:03    [W:0.278 / U:0.376 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site