[PATCH v4 11/21] RISC-V: perf: Restructure the SBI PMU code

[Will Deacon]

On Wed, Feb 05, 2025 at 11:23:16PM -0800, Atish Patra wrote:
> With Ssccfg/Smcdeleg, we no longer need SBI PMU extension to program/
> access hpmcounter/events. However, we do need it for firmware counters.
> Rename the driver and its related code to represent generic name
> that will handle both sbi and ISA mechanism for hpmcounter related
> operations. Take this opportunity to update the Kconfig names to
> match the new driver name closely.
> 
> No functional change intended.
> 
> Signed-off-by: Atish Patra <atishp at rivosinc.com>
> ---
>  MAINTAINERS                                       |   4 +-
>  arch/riscv/include/asm/kvm_vcpu_pmu.h             |   4 +-
>  arch/riscv/include/asm/kvm_vcpu_sbi.h             |   2 +-
>  arch/riscv/kvm/Makefile                           |   4 +-
>  arch/riscv/kvm/vcpu_sbi.c                         |   2 +-
>  drivers/perf/Kconfig                              |  16 +-
>  drivers/perf/Makefile                             |   4 +-
>  drivers/perf/{riscv_pmu.c => riscv_pmu_common.c}  |   0
>  drivers/perf/{riscv_pmu_sbi.c => riscv_pmu_dev.c} | 214 +++++++++++++---------

This seems... gratuitous? It feels like renaming the file could be a pain
for managing backports and renaming the driver might cause some headaches
in userspace.

What do you gain from such an invasive change?

Will