linux-kernel - [PATCH 3.2 065/110] KVM: x86: properly restore LVT0

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Message-ID: <lsq.1439201551.585045648@decadent.org.uk>
Date:	Mon, 10 Aug 2015 12:12:31 +0200
From:	Ben Hutchings <ben@...adent.org.uk>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:	akpm@...ux-foundation.org, "Paolo Bonzini" <pbonzini@...hat.com>,
	"Radim Krčmář" <rkrcmar@...hat.com>
Subject: [PATCH 3.2 065/110] KVM: x86: properly restore LVT0

3.2.71-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Radim Krčmář <rkrcmar@...hat.com>

commit db1385624c686fe99fe2d1b61a36e1537b915d08 upstream.

Legacy NMI watchdog didn't work after migration/resume, because
vapics_in_nmi_mode was left at 0.

Signed-off-by: Radim Krčmář <rkrcmar@...hat.com>
Signed-off-by: Paolo Bonzini <pbonzini@...hat.com>
[bwh: Backported to 3.2:
 - Adjust context
 - s/kvm_apic_get_reg/apic_get_reg/]
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 arch/x86/kvm/lapic.c | 1 +
 1 file changed, 1 insertion(+)

--- a/arch/x86/kvm/lapic.c
+++ b/arch/x86/kvm/lapic.c
@@ -1253,6 +1253,7 @@ void kvm_apic_post_state_restore(struct
 
 	apic_update_ppr(apic);
 	hrtimer_cancel(&apic->lapic_timer.timer);
+	apic_manage_nmi_watchdog(apic, apic_get_reg(apic, APIC_LVT0));
 	update_divide_count(apic);
 	start_apic_timer(apic);
 	apic->irr_pending = true;

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