[v2,0/3] arm64: cpufeatures: Display enabled cores

Message

Jeremy Linton Oct. 17, 2023, 5:23 a.m. UTC

The AMU feature can be enabled on a subset of the cores in a system.
Because of that, it prints a message for each core as it is detected.
This becomes tedious when there are hundreds of cores. Instead, for
CPU features which can be enabled on a subset of the present cores,
lets wait until update_cpu_capabilities() and print the subset of cores
the feature was enabled on.

Since the infrastructure now exists to display the subset of cores
where a feature is enabled, lets also enable it for the Dirty Bit Management
and 32-bit EL0. The 32-bit EL0 patch is only lightly tested as the AEM/TFA
model firmware doesn't like mismatched AARCH32 support. Its also the least
ugly version of the three or so options I considered.

v1->v2:
	Add DBM and 32-bit EL0 code so they now display the core subset
	Add Ionela Voinescu review/testing tags
	Small comment tweak in the first patch

Jeremy Linton (3):
  arm64: cpufeature: Display the set of cores with a feature
  arm64: cpufeature: Change DBM to display enabled cores
  arm64: cpufeature: Change 32-bit EL0 to display enabled cores

 arch/arm64/include/asm/cpufeature.h |  2 +
 arch/arm64/kernel/cpufeature.c      | 70 ++++++++++++++---------------
 2 files changed, 36 insertions(+), 36 deletions(-)

Comments

Catalin Marinas Oct. 23, 2023, 5:33 p.m. UTC | #1

On Tue, 17 Oct 2023 00:23:19 -0500, Jeremy Linton wrote:
> The AMU feature can be enabled on a subset of the cores in a system.
> Because of that, it prints a message for each core as it is detected.
> This becomes tedious when there are hundreds of cores. Instead, for
> CPU features which can be enabled on a subset of the present cores,
> lets wait until update_cpu_capabilities() and print the subset of cores
> the feature was enabled on.
> 
> [...]

Applied to arm64 (for-next/cpufeat-display-cores), thanks!

[1/3] arm64: cpufeature: Display the set of cores with a feature
      https://git.kernel.org/arm64/c/23b727dc2092
[2/3] arm64: cpufeature: Change DBM to display enabled cores
      https://git.kernel.org/arm64/c/04d402a453c3

I dropped the third patch from the series.