Re: [PATCH v3] arm64/arm: arm_pmuv3: perf: Don't truncate 64-bit registers

[Will Deacon]

On Thu, Nov 02, 2023 at 11:30:12AM -0700, Ilkka Koskinen wrote:
> The driver used to truncate several 64-bit registers such as PMCEID[n]
> registers used to describe whether architectural and microarchitectural
> events in range 0x4000-0x401f exist. Due to discarding the bits, the
> driver made the events invisible, even if they existed.
> 
> Moreover, PMCCFILTR and PMCR registers have additional bits in the upper
> 32 bits. This patch makes them available although they aren't currently
> used. Finally, functions handling PMXEVCNTR and PMXEVTYPER registers are
> removed as they not being used at all.
> 
> Fixes: df29ddf4f04b ("arm64: perf: Abstract system register accesses away")
> Reported-by: Carl Worth <carl@xxxxxxxxxxxxxxxxxxxxxx>
> Signed-off-by: Ilkka Koskinen <ilkka@xxxxxxxxxxxxxxxxxxxxxx>

Acked-by: Will Deacon <will@xxxxxxxxxx>

Catalin -- another perf fix for you, thanks!

Will