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| author | Scott Wood <scottwood@freescale.com> | 2014-06-24 20:15:51 -0500 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2015-08-07 00:32:16 +0100 |
| commit | dfbbd2eeb55b42e1e32a113c3cde01a6114391d3 (patch) | |
| tree | 683c4286d23a891e377252b85b36721195a4d0e8 /arch | |
| parent | 86e059f8367c5fc34bbe2350cc6a8c78335f4c58 (diff) | |
| download | kernel_samsung_smdk4412-dfbbd2eeb55b42e1e32a113c3cde01a6114391d3.zip kernel_samsung_smdk4412-dfbbd2eeb55b42e1e32a113c3cde01a6114391d3.tar.gz kernel_samsung_smdk4412-dfbbd2eeb55b42e1e32a113c3cde01a6114391d3.tar.bz2 | |
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: Ben Hutchings <ben@decadent.org.uk>
Cc: Jonathan Toppins <jtoppins@cumulusnetworks.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/powerpc/kernel/setup-common.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/arch/powerpc/kernel/setup-common.c b/arch/powerpc/kernel/setup-common.c index 675cbcf..83940d7 100644 --- a/arch/powerpc/kernel/setup-common.c +++ b/arch/powerpc/kernel/setup-common.c @@ -447,9 +447,17 @@ 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++; |