[09/21] KVM: PPC: Preload FPU when possible

Commit Message

Alexander Graf Feb. 19, 2010, 10 a.m. UTC

None

Patch

diff --git a/arch/powerpc/kvm/book3s.c b/arch/powerpc/kvm/book3s.c
index 6bdf7f2..07f8b42 100644
--- a/arch/powerpc/kvm/book3s.c
+++ b/arch/powerpc/kvm/book3s.c
@@ -137,6 +137,10 @@  void kvmppc_set_msr(struct kvm_vcpu *vcpu, u64 msr)
 		kvmppc_mmu_flush_segments(vcpu);
 		kvmppc_mmu_map_segment(vcpu, vcpu->arch.pc);
 	}
+
+	/* Preload FPU if it's enabled */
+	if (vcpu->arch.msr & MSR_FP)
+		kvmppc_handle_ext(vcpu, BOOK3S_INTERRUPT_FP_UNAVAIL, MSR_FP);
 }
 
 void kvmppc_inject_interrupt(struct kvm_vcpu *vcpu, int vec, u64 flags)
@@ -1194,6 +1198,10 @@  int __kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
 	/* XXX we get called with irq disabled - change that! */
 	local_irq_enable();
 
+	/* Preload FPU if it's enabled */
+	if (vcpu->arch.msr & MSR_FP)
+		kvmppc_handle_ext(vcpu, BOOK3S_INTERRUPT_FP_UNAVAIL, MSR_FP);
+
 	ret = __kvmppc_vcpu_entry(kvm_run, vcpu);
 
 	local_irq_disable();