powerpc: Add kconfig for muxed smp ipi support
Compile the new smp ipi mux and demux code only if a platform
will make use of it. The new config is selected as required.
The new cause_ipi smp op is only available conditionally to point out
configs where the select is required; this makes setting the op an
immediate fail instead of a deferred unresolved symbol at link.
This also creates a new config for power surge powermac upgrade support
that can be disabled in expert mode but is default on.
I also removed the depends / default y on CONFIG_XICS since it is selected
by PSERIES.
Signed-off-by: Milton Miller <miltonm@bga.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c
index fa8e870..d76f7d7 100644
--- a/arch/powerpc/kernel/smp.c
+++ b/arch/powerpc/kernel/smp.c
@@ -178,6 +178,7 @@
return err;
}
+#ifdef CONFIG_PPC_SMP_MUXED_IPI
struct cpu_messages {
unsigned long messages; /* current messages bits */
unsigned long data; /* data for cause ipi */
@@ -230,6 +231,7 @@
}
return IRQ_HANDLED;
}
+#endif /* CONFIG_PPC_SMP_MUXED_IPI */
void smp_send_reschedule(int cpu)
{