[PATCH v1 2/2] perf: RISC-V: store available counter mask as bitmap

[Paul Walmsley]

Hi,

On Fri, 7 Aug 2026, Xixin Liu wrote:

> The available-counter mask was a single unsigned long, but iteration
> uses RISCV_MAX_COUNTERS (64). On RV32 that reads past the object. Filling
> with BIT(i) is also wrong for i >= 32.
> 
> Use DECLARE_BITMAP, set_bit/bitmap helpers, and stop counters one word
> at a time.
> 
> Signed-off-by: Xixin Liu <liuxixin at kylinos.cn>

This patch contains several array indexes to element 0 of the cmask 
bitmap, but that element is going to be XLEN bits wide.   Does that 
actually work on RV32 systems?


- Paul