]> git.ipfire.org Git - thirdparty/kernel/stable.git/commit
perf/x86/intel/uncore: Fix the scale of IIO free running counters on SNR
authorKan Liang <kan.liang@linux.intel.com>
Wed, 16 Apr 2025 14:24:24 +0000 (07:24 -0700)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Fri, 25 Apr 2025 08:43:56 +0000 (10:43 +0200)
commit8a809a8bcb897077705184758d8aa88397a7d150
tree703bf999f5c58c3e20982628a8ef04f9a576583e
parent311b205fa93df5397078ad18a19a91e3d17c4a24
perf/x86/intel/uncore: Fix the scale of IIO free running counters on SNR

commit 96a720db59ab330c8562b2437153faa45dac705f upstream.

There was a mistake in the SNR uncore spec. The counter increments for
every 32 bytes of data sent from the IO agent to the SOC, not 4 bytes
which was documented in the spec.

The event list has been updated:

  "EventName": "UNC_IIO_BANDWIDTH_IN.PART0_FREERUN",
  "BriefDescription": "Free running counter that increments for every 32
       bytes of data sent from the IO agent to the SOC",

Update the scale of the IIO bandwidth in free running counters as well.

Fixes: 210cc5f9db7a ("perf/x86/intel/uncore: Add uncore support for Snow Ridge server")
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20250416142426.3933977-1-kan.liang@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
arch/x86/events/intel/uncore_snbep.c