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@xxxxxxxxxxxxx>
---
arch/powerpc/kvm/emulate.c | 3 ++-
1 files changed, 2 insertions(+), 1 deletions(-)
diff --git a/arch/powerpc/kvm/emulate.c b/arch/powerpc/kvm/emulate.c
index 141dce3..0452357 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
--
1.7.0.4
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