Hi Zhao,
>
> You can define dependency like this:
>
> diff --git a/target/i386/cpu.c b/target/i386/cpu.c
> index 3baa95481fbc..99c69ec9f369 100644
> --- a/target/i386/cpu.c
> +++ b/target/i386/cpu.c
> @@ -1803,6 +1803,10 @@ static FeatureDep feature_dependencies[] = {
> .from = { FEAT_7_1_EDX, CPUID_7_1_EDX_AVX10 },
> .to = { FEAT_24_0_EBX, ~0ull },
> },
> + {
> + .from = { FEAT_8000_0001_ECX, CPUID_EXT3_PERFCORE },
> + .to = { FEAT_8000_0022_EAX, CPUID_8000_0022_EAX_PERFMON_V2 }
> + }
> };
>
> typedef struct X86RegisterInfo32 {
>
> ---
> Does this meet your needs?
>
Thank you very much for the suggestion.
Yes, this works. The PERFCORE is a prerequisite of PERFMON_V2 (according to
Linux kernel source code).
1403 static int __init amd_core_pmu_init(void)
1404 {
1405 union cpuid_0x80000022_ebx ebx;
1406 u64 even_ctr_mask = 0ULL;
1407 int i;
1408
1409 if (!boot_cpu_has(X86_FEATURE_PERFCTR_CORE))
1410 return 0;
If you don't mind, I will send the v2 with your Suggested-by.
Thank you very much!
Dongli Zhang
