kernel.git/arch/powerpc/platforms/pseries/hotplug-cpu.c, branch linux-2.6.25.y

[POWERPC] Split xics_teardown_cpu()

2008-02-07T00:40:19Z

This splits off the kexec path bits of the xics_teardown_cpu() routine into its own xics_kexec_teardown_cpu() routine. With the previous combined routine the CPPR for a cpu that is being removed may have its CPPR reset in the plpar_eoi() call (which explicitly sets the CPPR to a non-zero value). Splitting of the kexec bits of the code prevents this from happening in the cpu remove path. Once again, this does not cause the cpu remove from the kernel to fail, but it does cause cpu dlpar operations to not be able to return the cpu to the hypervisor. Signed-off-by: Nathan Fontenot Signed-off-by: Paul Mackerras

cpu-hotplug: replace lock_cpu_hotplug() with get_online_cpus()

2008-01-25T20:08:02Z

Replace all lock_cpu_hotplug/unlock_cpu_hotplug from the kernel and use get_online_cpus and put_online_cpus instead as it highlights the refcount semantics in these operations. The new API guarantees protection against the cpu-hotplug operation, but it doesn't guarantee serialized access to any of the local data structures. Hence the changes needs to be reviewed. In case of pseries_add_processor/pseries_remove_processor, use cpu_maps_update_begin()/cpu_maps_update_done() as we're modifying the cpu_present_map there. Signed-off-by: Gautham R Shenoy Signed-off-by: Ingo Molnar

[POWERPC] Fix CPU hotplug when using the SLB shadow buffer

2008-01-11T05:33:55Z

Before we register the SLB shadow buffer, we need to invalidate the entries in the buffer, otherwise we can end up stale entries from when we previously offlined the CPU. This does this invalidate as well as unregistering the buffer with PHYP before we offline the cpu. Tested and fixes crashes seen on 970MP (thanks to tonyb) and POWER5. Signed-off-by: Michael Neuling Signed-off-by: Paul Mackerras

[POWERPC] Don't enable cpu hotplug on pSeries machines with MPIC

2007-10-11T11:06:06Z

Don't allow cpu hotplug on systems lacking XICS interrupt controller (i.e. with an MPIC interrupt controller), since the current pSeries platform code is hardcoded for XICS. This works around the bug reported by Paul Mackerras where the disable_nonboot_cpus() call recently added to the shutdown path will cause an oops on older pSeries machines. Signed-off-by: Olof Johansson Signed-off-by: Paul Mackerras

[POWERPC] Rename get_property to of_get_property: arch/powerpc

2007-04-12T17:55:19Z

Signed-off-by: Stephen Rothwell Acked-by: Benjamin Herrenschmidt Signed-off-by: Paul Mackerras

[POWERPC] Cleanup pass over platforms/pseries/hotplug-cpu.c

2006-12-08T04:55:55Z

Purely cosmetic. Change pSeries to pseries inline with other parts of the kernel, and fix an overly long line. Signed-off-by: Michael Ellerman Signed-off-by: Paul Mackerras

[POWERPC] Only enable cpu hotplug via RTAS if the required firmware support is found

2006-12-08T04:55:55Z

To support cpu hotplug on pseries we require two RTAS tokens. The cpu hotplug machinery should only be wired up if these tokens are found in the device tree. Signed-off-by: Michael Ellerman Signed-off-by: Paul Mackerras

[POWERPC] Move the rest of the hotplug cpu code into platforms/pseries/hotplug-cpu.c

2006-12-08T04:55:55Z

Move the rest of the hotplug cpu code from platforms/pseries/smp.c into platforms/pseries/hotplug-cpu.c. Wire up the smp_ops callbacks and the notifier in the hotplug cpu initcall, rather than in smp_init_pseries(). No change in behaviour. Signed-off-by: Michael Ellerman Signed-off-by: Paul Mackerras

[POWERPC] Move pSeries_mach_cpu_die() into platforms/pseries/hotplug-cpu.c

2006-12-08T04:55:55Z

Move pSeries_mach_cpu_die() into platforms/pseries/hotplug-cpu.c, this allows rtas_stop_self() to be static so remove the prototype. Wire up pSeries_mach_cpu_die() in the initcall, rather than statically in setup.c, the initcall will still run prior to the cpu hotplug code being callable, so there should be no change in behaviour. Signed-off-by: Michael Ellerman Signed-off-by: Paul Mackerras

[POWERPC] Move rtas_stop_self() into platforms/pseries/hotplug-cpu.c

2006-12-08T04:55:54Z

As the first step in consolidating the pseries hotplug cpu code, create platforms/pseries/hotplug-cpu.c and move rtas_stop_self() into it. Do the rtas token initialisation in a new initcall, rather than rtas_initialize(). Signed-off-by: Michael Ellerman Acked-by: Linas Vepstas Signed-off-by: Paul Mackerras