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authorScott Wood <scottwood@freescale.com>2014-06-24 20:15:51 -0500
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2014-07-06 18:57:28 -0700
commit211f36b51bf27dabea5dbd5052b0146712e95164 (patch)
treec8c126f32ab03009f7c7d81d0e6a2e6299c1a333 /arch/powerpc
parent0753c96beafac5e8d091c866a38e73022829206d (diff)
powerpc: Don't skip ePAPR spin-table CPUs
commit 6663a4fa6711050036562ddfd2086edf735fae21 upstream. Commit 59a53afe70fd530040bdc69581f03d880157f15a "powerpc: Don't setup CPUs with bad status" broke ePAPR SMP booting. ePAPR says that CPUs that aren't presently running shall have status of disabled, with enable-method being used to determine whether the CPU can be enabled. Fix by checking for spin-table, which is currently the only supported enable-method. Signed-off-by: Scott Wood <scottwood@freescale.com> Cc: Michael Neuling <mikey@neuling.org> Cc: Emil Medve <Emilian.Medve@Freescale.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/powerpc')
-rw-r--r--arch/powerpc/kernel/setup-common.c10
1 files changed, 9 insertions, 1 deletions
diff --git a/arch/powerpc/kernel/setup-common.c b/arch/powerpc/kernel/setup-common.c
index 486cc04d5a09..04aa4d3c7c05 100644
--- a/arch/powerpc/kernel/setup-common.c
+++ b/arch/powerpc/kernel/setup-common.c
@@ -456,9 +456,17 @@ void __init smp_setup_cpu_maps(void)
}
for (j = 0; j < nthreads && cpu < nr_cpu_ids; j++) {
+ bool avail;
+
DBG(" thread %d -> cpu %d (hard id %d)\n",
j, cpu, be32_to_cpu(intserv[j]));
- set_cpu_present(cpu, of_device_is_available(dn));
+
+ avail = of_device_is_available(dn);
+ if (!avail)
+ avail = !of_property_match_string(dn,
+ "enable-method", "spin-table");
+
+ set_cpu_present(cpu, avail);
set_hard_smp_processor_id(cpu, be32_to_cpu(intserv[j]));
set_cpu_possible(cpu, true);
cpu++;