linux-kernel - Re: [PATCHv1 3/5] arm64: dts: amlogic: Add cache information to the Amlogic G12A SoCS

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Message-ID: <CANAwSgRmwXUqb-NUadgS1ENLvJQZXX9xjc4V6j+vw7jHf+dZZA@mail.gmail.com>
Date: Tue, 27 Feb 2024 18:33:51 +0530
From: Anand Moon <linux.amoon@...il.com>
To: Christian Hewitt <christianshewitt@...il.com>
Cc: Rob Herring <robh+dt@...nel.org>, 
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>, Conor Dooley <conor+dt@...nel.org>, 
	Neil Armstrong <neil.armstrong@...aro.org>, Kevin Hilman <khilman@...libre.com>, 
	Jerome Brunet <jbrunet@...libre.com>, 
	Martin Blumenstingl <martin.blumenstingl@...glemail.com>, 
	devicetree <devicetree@...r.kernel.org>, linux-arm-kernel@...ts.infradead.org, 
	AML <linux-amlogic@...ts.infradead.org>, LKML <linux-kernel@...r.kernel.org>, 
	Viacheslav <adeep@...ina.in>
Subject: Re: [PATCHv1 3/5] arm64: dts: amlogic: Add cache information to the
 Amlogic G12A SoCS

Hi Christian / Viacheslav,

On Tue, 6 Feb 2024 at 13:23, Christian Hewitt
<christianshewitt@...il.com> wrote:
>
> > On 6 Feb 2024, at 11:48 am, Viacheslav <adeep@...ina.in> wrote:
> >
> > You missed the AXG family with the Cortex-A53 CPU. The datasheet does not provide information on cache sizes. Given that the A113X/A113D are equipped with the Arm Cortex-A53 processor, it is assumed they use the same cache size as the S905/S905X/S905X2 models.
>
> GXM is also missing, and also using A53 cores.
>
> Christian
>

This patch is valid if the hardware supports perf PMU events, see below
I dont have the hardware.

Best way to let the Amlogic SoC members comment on the CPU  L1/ /L2 cache size.
But with the lack of pref PMU events we cannot test this feature.

alarm@...hl-librecm ~]$ sudo perf list

List of pre-defined events (to be used in -e or -M):

  branch-instructions OR branches                    [Hardware event]
  branch-misses                                      [Hardware event]
  bus-cycles                                         [Hardware event]
  cache-misses                                       [Hardware event]
  cache-references                                   [Hardware event]
  cpu-cycles OR cycles                               [Hardware event]
  instructions                                       [Hardware event]
  alignment-faults                                   [Software event]
  bpf-output                                         [Software event]
  cgroup-switches                                    [Software event]
  context-switches OR cs                             [Software event]
  cpu-clock                                          [Software event]
  cpu-migrations OR migrations                       [Software event]
  dummy                                              [Software event]
  emulation-faults                                   [Software event]
  major-faults                                       [Software event]
  minor-faults                                       [Software event]
  page-faults OR faults                              [Software event]
  task-clock                                         [Software event]
  duration_time                                      [Tool event]
  user_time                                          [Tool event]
  system_time                                        [Tool event]

armv8_cortex_a53:
  L1-dcache-loads OR armv8_cortex_a53/L1-dcache-loads/
  L1-dcache-load-misses OR armv8_cortex_a53/L1-dcache-load-misses/
  L1-dcache-prefetch-misses OR armv8_cortex_a53/L1-dcache-prefetch-misses/
  L1-icache-loads OR armv8_cortex_a53/L1-icache-loads/
  L1-icache-load-misses OR armv8_cortex_a53/L1-icache-load-misses/
  dTLB-load-misses OR armv8_cortex_a53/dTLB-load-misses/
  iTLB-load-misses OR armv8_cortex_a53/iTLB-load-misses/
  branch-loads OR armv8_cortex_a53/branch-loads/
  branch-load-misses OR armv8_cortex_a53/branch-load-misses/
  node-loads OR armv8_cortex_a53/node-loads/
  node-stores OR armv8_cortex_a53/node-stores/
  br_immed_retired OR armv8_cortex_a53/br_immed_retired/[Kernel PMU event]
  br_mis_pred OR armv8_cortex_a53/br_mis_pred/       [Kernel PMU event]
  br_pred OR armv8_cortex_a53/br_pred/               [Kernel PMU event]
  bus_access OR armv8_cortex_a53/bus_access/         [Kernel PMU event]
  bus_cycles OR armv8_cortex_a53/bus_cycles/         [Kernel PMU event]
  cid_write_retired OR armv8_cortex_a53/cid_write_retired/[Kernel PMU event]
  cpu_cycles OR armv8_cortex_a53/cpu_cycles/         [Kernel PMU event]
  exc_return OR armv8_cortex_a53/exc_return/         [Kernel PMU event]

> >
> > Best regards,
> > --
> > Viacheslav Bocharov <adeep@...ina.in>
> >
> > _______________________________________________
> > linux-amlogic mailing list
> > linux-amlogic@...ts.infradead.org
> > http://lists.infradead.org/mailman/listinfo/linux-amlogic
>
>

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