linux-kernel - [PATCH 4.2 38/54] KVM: x86: fix SMI to halted VCPU

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Date:	Fri, 23 Oct 2015 10:45:14 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Paolo Bonzini <pbonzini@...hat.com>
Subject: [PATCH 4.2 38/54] KVM: x86: fix SMI to halted VCPU

4.2-stable review patch.  If anyone has any objections, please let me know.

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

From: Paolo Bonzini <pbonzini@...hat.com>

commit 73917739334c6509833b0403b81d4a04a8784bdf upstream.

An SMI to a halted VCPU must wake it up, hence a VCPU with a pending
SMI must be considered runnable.

Fixes: 64d6067057d9658acb8675afcfba549abdb7fc16
Signed-off-by: Paolo Bonzini <pbonzini@...hat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 arch/x86/kvm/x86.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -8030,6 +8030,9 @@ static inline bool kvm_vcpu_has_events(s
 	if (atomic_read(&vcpu->arch.nmi_queued))
 		return true;
 
+	if (test_bit(KVM_REQ_SMI, &vcpu->requests))
+		return true;
+
 	if (kvm_arch_interrupt_allowed(vcpu) &&
 	    kvm_cpu_has_interrupt(vcpu))
 		return true;


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