Re: [PATCH v4 10/10] KVM/x86/lbr: lazy save the guest lbr stack II

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Subject: Re: [PATCH v4 10/10] KVM/x86/lbr: lazy save the guest lbr stack II
From: Andi Kleen <ak@xxxxxxxxxxxxxxx>
Date: Thu, 27 Dec 2018 12:52:58 -0800
Cc: linux-kernel@xxxxxxxxxxxxxxx, kvm@xxxxxxxxxxxxxxx, pbonzini@xxxxxxxxxx, peterz@xxxxxxxxxxxxx, kan.liang@xxxxxxxxx, mingo@xxxxxxxxxx, rkrcmar@xxxxxxxxxx, like.xu@xxxxxxxxx, jannh@xxxxxxxxxx, arei.gonglei@xxxxxxxxxx
In-reply-to: <1545816338-1171-11-git-send-email-wei.w.wang@intel.com>
References: <1545816338-1171-1-git-send-email-wei.w.wang@intel.com> <1545816338-1171-11-git-send-email-wei.w.wang@intel.com>
User-agent: Mutt/1.10.1 (2018-07-13)

Actually forgot one case.

In Arch Perfmon v4 the LBR freezing is also controlled through a GLOBAL_CTRL bit.
I didn't see any code handling that bit?


-Andi

Follow-Ups:
- RE: [PATCH v4 10/10] KVM/x86/lbr: lazy save the guest lbr stack II
  - From: Wang, Wei W

References:
- [PATCH v4 00/10] Guest LBR Enabling
  - From: Wei Wang
- [PATCH v4 10/10] KVM/x86/lbr: lazy save the guest lbr stack
  - From: Wei Wang

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