> 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_0x8022_ebx ebx;
> 1406 u64 even_ctr_mask = 0ULL
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_
Hi Dongli,
On Mon, Nov 04, 2024 at 01:40:16AM -0800, Dongli Zhang wrote:
> Date: Mon, 4 Nov 2024 01:40:16 -0800
> From: Dongli Zhang
> Subject: [PATCH 1/7] target/i386: disable PerfMonV2 when PERFCORE
> unavailable
> X-Mailer: git-send-email 2.43.5
>
> When the PERFCORE i
When the PERFCORE is disabled with "-cpu host,-perfctr-core", it is
reflected in in guest dmesg.
[0.285136] Performance Events: AMD PMU driver.
However, the guest cpuid indicates the PerfMonV2 is still available.
CPU:
Extended Performance Monitoring and Debugging (0x8022):
AMD p
