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| author | Michael Neuling <mikey@neuling.org> | 2010-04-28 13:39:41 +0000 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2010-05-06 16:49:25 +1000 |
| commit | f8b67691828321f5c85bb853283aa101ae673130 (patch) | |
| tree | 0938bf959cb7d830547d76bc8a40c33dd03c1d2a /arch/powerpc/platforms/pseries/smp.c | |
| parent | a32fe93daf9c6b6ffbab1d9b9e2a8e4c335bda5c (diff) | |
| download | blackbird-op-linux-f8b67691828321f5c85bb853283aa101ae673130.tar.gz blackbird-op-linux-f8b67691828321f5c85bb853283aa101ae673130.zip | |
powerpc/pseries: Make query_cpu_stopped callable outside hotplug cpu
This moves query_cpu_stopped() out of the hotplug cpu code and into
smp.c so it can called in other places and renames it to
smp_query_cpu_stopped().
It also cleans up the return values by adding some #defines
Cc: <stable@kernel.org>
Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/platforms/pseries/smp.c')
| -rw-r--r-- | arch/powerpc/platforms/pseries/smp.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/pseries/smp.c b/arch/powerpc/platforms/pseries/smp.c index 4e7f89a84561..20b694280a66 100644 --- a/arch/powerpc/platforms/pseries/smp.c +++ b/arch/powerpc/platforms/pseries/smp.c @@ -57,6 +57,28 @@ */ static cpumask_t of_spin_map; +/* Query where a cpu is now. Return codes #defined in plpar_wrappers.h */ +int smp_query_cpu_stopped(unsigned int pcpu) +{ + int cpu_status, status; + int qcss_tok = rtas_token("query-cpu-stopped-state"); + + if (qcss_tok == RTAS_UNKNOWN_SERVICE) { + printk(KERN_INFO "Firmware doesn't support " + "query-cpu-stopped-state\n"); + return QCSS_HARDWARE_ERROR; + } + + status = rtas_call(qcss_tok, 1, 2, &cpu_status, pcpu); + if (status != 0) { + printk(KERN_ERR + "RTAS query-cpu-stopped-state failed: %i\n", status); + return status; + } + + return cpu_status; +} + /** * smp_startup_cpu() - start the given cpu * |
