linux-kernel - [PATCH v2 1/6] KVM: x86: SVM: add module param to control LBR virtualization

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Date:   Mon,  1 Nov 2021 16:03:19 +0200
From:   Maxim Levitsky <mlevitsk@...hat.com>
To:     kvm@...r.kernel.org
Cc:     Shuah Khan <shuah@...nel.org>,
        linux-kselftest@...r.kernel.org (open list:KERNEL SELFTEST FRAMEWORK),
        Borislav Petkov <bp@...en8.de>,
        Paolo Bonzini <pbonzini@...hat.com>,
        linux-kernel@...r.kernel.org (open list:X86 ARCHITECTURE (32-BIT AND
        64-BIT)), Joerg Roedel <joro@...tes.org>,
        "H. Peter Anvin" <hpa@...or.com>,
        Maxim Levitsky <mlevitsk@...hat.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Bandan Das <bsd@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Sean Christopherson <seanjc@...gle.com>,
        Wei Huang <wei.huang2@....com>,
        x86@...nel.org (maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)),
        Ingo Molnar <mingo@...hat.com>
Subject: [PATCH v2 1/6] KVM: x86: SVM: add module param to control LBR virtualization

This is useful for debug and also makes it consistent with
the rest of the SVM optional features.

Signed-off-by: Maxim Levitsky <mlevitsk@...hat.com>
---
 arch/x86/kvm/svm/svm.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c
index 21bb81710e0f6..2b5f8e10d686d 100644
--- a/arch/x86/kvm/svm/svm.c
+++ b/arch/x86/kvm/svm/svm.c
@@ -186,12 +186,13 @@ module_param(vls, int, 0444);
 static int vgif = true;
 module_param(vgif, int, 0444);
 
+static int tsc_scaling = true;
+module_param(tsc_scaling, int, 0444);
+
 /* enable/disable LBR virtualization */
 static int lbrv = true;
 module_param(lbrv, int, 0444);
 
-static int tsc_scaling = true;
-module_param(tsc_scaling, int, 0444);
 
 /*
  * enable / disable AVIC.  Because the defaults differ for APICv
-- 
2.26.3