Currently kvmppc_start_thread() tries to wake other SMT threads via
xics_wake_cpu(). Unfortunately xics_wake_cpu only exists when
CONFIG_SMP=Y so when compiling with CONFIG_SMP=N we get:
arch/powerpc/kvm/built-in.o: In function `.kvmppc_start_thread':
book3s_hv.c:(.text+0xa1e0): undefined reference to `.xics_wake_cpu'
The following should be fine since kvmppc_start_thread() shouldn't
called to start non-zero threads when SMP=N since threads_per_core=1.
Signed-off-by: Michael Neuling <mi...@neuling.org>
---
arch/powerpc/kvm/book3s_hv.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
Index: linux-ozlabs/arch/powerpc/kvm/book3s_hv.c
===================================================================
--- linux-ozlabs.orig/arch/powerpc/kvm/book3s_hv.c
+++ linux-ozlabs/arch/powerpc/kvm/book3s_hv.c
@@ -538,7 +538,7 @@ static void kvmppc_start_thread(struct k
tpaca->kvm_hstate.napping = 0;
vcpu->cpu = vc->pcpu;
smp_wmb();
-#ifdef CONFIG_PPC_ICP_NATIVE
+#if defined(CONFIG_PPC_ICP_NATIVE) && defined(CONFIG_SMP)
if (vcpu->arch.ptid) {
tpaca->cpu_start = 0x80;
wmb();
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