linux-kernel - [PATCH] KVM: x86: check LAPIC presence when building apic

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Message-Id: <1422567215-28079-1-git-send-email-rkrcmar@redhat.com>
Date:	Thu, 29 Jan 2015 22:33:35 +0100
From:	Radim Krčmář <rkrcmar@...hat.com>
To:	linux-kernel@...r.kernel.org
Cc:	kvm@...r.kernel.org, Paolo Bonzini <pbonzini@...hat.com>,
	Nadav Amit <namit@...technion.ac.il>
Subject: [PATCH] KVM: x86: check LAPIC presence when building apic_map

We forgot to re-check LAPIC after splitting the loop in
 173beedc1601 KVM: x86: Software disabled APIC should still deliver NMIs

Signed-off-by: Radim Krčmář <rkrcmar@...hat.com>
---
 arch/x86/kvm/lapic.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c
index a688fbffb34e..d1b7d42c3af0 100644
--- a/arch/x86/kvm/lapic.c
+++ b/arch/x86/kvm/lapic.c
@@ -193,6 +193,9 @@ static void recalculate_apic_map(struct kvm *kvm)
 		u16 cid, lid;
 		u32 ldr, aid;
 
+		if (!kvm_apic_present(vcpu))
+			continue;
+
 		aid = kvm_apic_id(apic);
 		ldr = kvm_apic_get_reg(apic, APIC_LDR);
 		cid = apic_cluster_id(new, ldr);
-- 
2.2.2

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