]> 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 08:45:51 +0000 (10:45 +0200)
commitaea923afeae483eb520278346456fa2c0bdcafff
treeaefb16a48a8b61543d4ef62471612f52b04e094c
parent196a4eecb87b94145243c8c0847d41eb1fa84527
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