Commit 7401f626 authored Oct 31, 2011 by Bharat Bhushan Committed by Avi Kivity Mar 05, 2012

KVM: PPC: booke: Do Not start decrementer when SPRN_DEC set 0



As per specification the decrementer interrupt not happen when DEC is written
with 0. Also when DEC is zero, no decrementer running. So we should not start
hrtimer for decrementer when DEC = 0.

Signed-off-by: Bharat Bhushan <bharat.bhushan@freescale.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Avi Kivity <avi@redhat.com>

parent dc2babfe

arch/powerpc/kvm/emulate.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -77,7 +77,8 @@ static int kvmppc_dec_enabled(struct kvm_vcpu *vcpu)
		#else
		static int kvmppc_dec_enabled(struct kvm_vcpu *vcpu)
		{
		return vcpu->arch.tcr & TCR_DIE;
		/* On BOOKE, DEC = 0 is as good as decrementer not enabled */
		return (vcpu->arch.tcr & TCR_DIE) && vcpu->arch.dec;
		}
		#endif