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

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Message-ID: <20181227205258.GH25620@tassilo.jf.intel.com>
Date:   Thu, 27 Dec 2018 12:52:58 -0800
From:   Andi Kleen <ak@...ux.intel.com>
To:     Wei Wang <wei.w.wang@...el.com>
Cc:     linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
        pbonzini@...hat.com, peterz@...radead.org, kan.liang@...el.com,
        mingo@...hat.com, rkrcmar@...hat.com, like.xu@...el.com,
        jannh@...gle.com, arei.gonglei@...wei.com
Subject: Re: [PATCH v4 10/10] KVM/x86/lbr: lazy save the guest lbr stack II


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