From: Zhao Liu <zhao1.liu@intel.com>
To: dongli.zhang@oracle.com
Cc: qemu-devel@nongnu.org, kvm@vger.kernel.org, pbonzini@redhat.com,
mtosatti@redhat.com, sandipan.das@amd.com, babu.moger@amd.com,
likexu@tencent.com, like.xu.linux@gmail.com,
zhenyuw@linux.intel.com, groug@kaod.org, lyan@digitalocean.com,
khorenko@virtuozzo.com, alexander.ivanov@virtuozzo.com,
den@virtuozzo.com, joe.jin@oracle.com,
davydov-max@yandex-team.ru
Subject: Re: [PATCH 1/7] target/i386: disable PerfMonV2 when PERFCORE unavailable
Date: Thu, 7 Nov 2024 15:57:28 +0800 [thread overview]
Message-ID: <Zyxy6IL5oOP1NFrn@intel.com> (raw)
In-Reply-To: <7497ade9-de05-49a9-9419-83e015646ebd@oracle.com>
> 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!
Sure, welcome! :)
-Zhao
> Dongli Zhang
next prev parent reply other threads:[~2024-11-07 7:40 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-11-04 9:40 [PATCH 0/7] target/i386/kvm/pmu: Enhancement, Bugfix and Cleanup Dongli Zhang
2024-11-04 9:40 ` [PATCH 1/7] target/i386: disable PerfMonV2 when PERFCORE unavailable Dongli Zhang
2024-11-06 3:54 ` Zhao Liu
2024-11-07 0:29 ` dongli.zhang
2024-11-07 7:57 ` Zhao Liu [this message]
2024-11-04 9:40 ` [PATCH 2/7] target/i386/kvm: introduce 'pmu-cap-disabled' to set KVM_PMU_CAP_DISABLE Dongli Zhang
2024-11-07 7:52 ` Zhao Liu
2024-11-07 23:44 ` dongli.zhang
2024-11-08 2:32 ` Zhao Liu
2024-11-08 12:52 ` Sandipan Das
2024-11-13 17:15 ` Zhao Liu
2024-11-14 0:13 ` dongli.zhang
2024-11-21 10:06 ` Mi, Dapeng
2025-02-07 9:52 ` Mi, Dapeng
2025-02-09 20:12 ` dongli.zhang
2025-02-10 8:04 ` Mi, Dapeng
2024-11-04 9:40 ` [PATCH 3/7] target/i386/kvm: init PMU information only once Dongli Zhang
2024-11-10 15:29 ` Zhao Liu
2024-11-13 1:50 ` dongli.zhang
2024-11-13 16:48 ` Zhao Liu
2024-11-04 9:40 ` [PATCH 4/7] target/i386/kvm: rename architectural PMU variables Dongli Zhang
2024-11-04 9:40 ` [PATCH 5/7] target/i386/kvm: reset AMD PMU registers during VM reset Dongli Zhang
2024-11-06 9:58 ` Sandipan Das
2024-11-07 0:33 ` dongli.zhang
2024-11-07 21:00 ` Maksim Davydov
2024-11-08 1:19 ` dongli.zhang
2024-11-08 14:07 ` Maksim Davydov
2024-11-08 18:04 ` dongli.zhang
2024-11-04 9:40 ` [PATCH 6/7] target/i386/kvm: support perfmon-v2 for reset Dongli Zhang
2024-11-08 13:09 ` Sandipan Das
2024-11-08 16:55 ` dongli.zhang
2024-11-04 9:40 ` [PATCH 7/7] target/i386/kvm: don't stop Intel PMU counters Dongli Zhang
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