Re: [PATCH V7 00/18] KVM: x86/pmu: Add *basic* support to enable guest PEBS via DS
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- Subject: Re: [PATCH V7 00/18] KVM: x86/pmu: Add *basic* support to enable guest PEBS via DS
- From: Liuxiangdong <liuxiangdong5@xxxxxxxxxx>
- Date: Mon, 12 Jul 2021 09:37:28 +0800
- Cc: <ak@xxxxxxxxxxxxxxx>, <bp@xxxxxxxxx>, <eranian@xxxxxxxxxx>, <jmattson@xxxxxxxxxx>, <joro@xxxxxxxxxx>, <kan.liang@xxxxxxxxxxxxxxx>, <kvm@xxxxxxxxxxxxxxx>, <like.xu.linux@xxxxxxxxx>, <linux-kernel@xxxxxxxxxxxxxxx>, <liuxiangdong5@xxxxxxxxxx>, <pbonzini@xxxxxxxxxx>, <peterz@xxxxxxxxxxxxx>, <seanjc@xxxxxxxxxx>, <vkuznets@xxxxxxxxxx>, <wanpengli@xxxxxxxxxxx>, <wei.w.wang@xxxxxxxxx>, <weijiang.yang@xxxxxxxxx>, <x86@xxxxxxxxxx>, "Fangyi (Eric)" <eric.fangyi@xxxxxxxxxx>, Xiexiangyou <xiexiangyou@xxxxxxxxxx>
- In-reply-to: <20210622094306.8336-1-lingshan.zhu@intel.com>
- References: <20210622094306.8336-1-lingshan.zhu@intel.com>
- User-agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:38.0) Gecko/20100101 Thunderbird/38.1.0
Hi， Lingshan.
We can use basic pebs for KVM Guest on ICX by this patches set. Will we
consider supporting "perf mem" for KVM Guest?
AFAIK, the load latency facility requires processor supporting PEBS.
Besides, it needs MSR_PEBS_LD_LAT_THRESHOLD
msr (3F6H) to specify the desired latency threshold. How about
passthrough this msr to Guest?
Thanks!
Xiangdong Liu
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