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From: Like Xu <like.xu@linux.intel.com>
To: Paolo Bonzini <pbonzini@redhat.com>,
	Sean Christopherson <seanjc@google.com>
Cc: Vitaly Kuznetsov <vkuznets@redhat.com>,
	Wanpeng Li <wanpengli@tencent.com>,
	Jim Mattson <jmattson@google.com>, Joerg Roedel <joro@8bytes.org>,
	kvm@vger.kernel.org, x86@kernel.org,
	linux-kernel@vger.kernel.org
Subject: [PATCH 1/2] KVM: vmx/pmu: Fix dummy check if lbr_desc->event is created
Date: Tue, 23 Feb 2021 09:39:57 +0800	[thread overview]
Message-ID: <20210223013958.1280444-1-like.xu@linux.intel.com> (raw)

If lbr_desc->event is successfully created, the intel_pmu_create_
guest_lbr_event() will return 0, otherwise it will return -ENOENT,
and then jump to LBR msrs dummy handling.

Fixes: 1b5ac3226a1a ("KVM: vmx/pmu: Pass-through LBR msrs when the guest LBR event is ACTIVE")
Signed-off-by: Like Xu <like.xu@linux.intel.com>
---
 arch/x86/kvm/vmx/pmu_intel.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kvm/vmx/pmu_intel.c b/arch/x86/kvm/vmx/pmu_intel.c
index d1df618cb7de..d6a5fe19ff09 100644
--- a/arch/x86/kvm/vmx/pmu_intel.c
+++ b/arch/x86/kvm/vmx/pmu_intel.c
@@ -320,7 +320,7 @@ static bool intel_pmu_handle_lbr_msrs_access(struct kvm_vcpu *vcpu,
 	if (!intel_pmu_is_valid_lbr_msr(vcpu, index))
 		return false;
 
-	if (!lbr_desc->event && !intel_pmu_create_guest_lbr_event(vcpu))
+	if (!lbr_desc->event && intel_pmu_create_guest_lbr_event(vcpu))
 		goto dummy;
 
 	/*
-- 
2.29.2


             reply	other threads:[~2021-02-23  1:49 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-02-23  1:39 Like Xu [this message]
2021-02-23  1:39 ` [PATCH 2/2] KVM: vmx/pmu: Clear DEBUGCTLMSR_LBR bit on the debug breakpoint event Like Xu
2021-02-23 16:38   ` Sean Christopherson
2021-02-23 17:06     ` Paolo Bonzini
2021-02-23 17:06 ` [PATCH 1/2] KVM: vmx/pmu: Fix dummy check if lbr_desc->event is created Paolo Bonzini
2021-02-23 17:15 ` Sean Christopherson
2021-02-23 17:19   ` Paolo Bonzini
2021-02-24  2:29   ` Xu, Like
2021-02-26 22:46     ` Sean Christopherson

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