From: Bharat Bhushan Date: Mon, 31 Oct 2011 08:52:08 +0000 (+0530) Subject: KVM: PPC: booke: Do Not start decrementer when SPRN_DEC set 0 X-Git-Tag: upstream/snapshot3+hdmi~7836^2~99 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=7401f6266de021990efc7bc212289219ba8f9a7a;hp=dc2babfea592e633cf3890294af6545609b466be;p=platform%2Fadaptation%2Frenesas_rcar%2Frenesas_kernel.git 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 Signed-off-by: Alexander Graf Signed-off-by: Avi Kivity --- diff --git a/arch/powerpc/kvm/emulate.c b/arch/powerpc/kvm/emulate.c index 4337f99..b6df56d 100644 --- a/arch/powerpc/kvm/emulate.c +++ b/arch/powerpc/kvm/emulate.c @@ -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