Re: [PATCH 3/7] util/cpuinfo-aarch64: Detect FEAT_CSSC

[Richard Henderson <richard.henderson@linaro.org>]

On 8/11/26 20:35, Brad Smith wrote:
>> @@ -101,6 +103,15 @@ unsigned __attribute__((constructor)) cpuinfo_init(void)
>>           }
>>       }
>> +    mib[0] = CTL_MACHDEP;
>> +    mib[1] = CPU_ID_AA64ISAR2;
>> +    len = sizeof(isar2);
>> +    if (sysctl(mib, 2, &isar2, &len, NULL, 0) != -1) {
>> +        if (ID_AA64ISAR2_CSSC(isar2) >= ID_AA64ISAR2_CSSC_IMPL) {
>> +            info |= CPUINFO_CSSC;
>> +        }
>> +    }
>> +
>>       mib[0] = CTL_MACHDEP;
>>       mib[1] = CPU_ID_AA64PFR1;
>>       len = sizeof(pfr1);
> 
> You can remove the bottom chunk. Any OpenBSD release that has the ID_AA64ISAR2_CSSC
> and ID_AA64ISAR2_CSSC_IMPL constants is also covered by elf_aux_info() which is the
> first chunk.

Right-o.  Thanks!

r~