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| author | Jesse Larrew <jlarrew@linux.vnet.ibm.com> | 2010-12-01 12:31:26 +0000 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2010-12-09 15:36:30 +1100 |
| commit | 3b7a27db3b6b5501e3d1c1628e6d5a547ffe76c6 (patch) | |
| tree | e30f3b6449ede133a03a56d8e57a82751ce3dbdc /arch | |
| parent | 9eff1a38407c051273fe1a20f03f8155bd32de35 (diff) | |
| download | op-kernel-dev-3b7a27db3b6b5501e3d1c1628e6d5a547ffe76c6.zip op-kernel-dev-3b7a27db3b6b5501e3d1c1628e6d5a547ffe76c6.tar.gz | |
powerpc: Disable VPHN polling during a suspend operation
Tie the polling mechanism into the ibm,suspend-me rtas call to
stop/restart polling before/after a suspend, hibernate, migrate,
or checkpoint restart operation. This ensures that the system has a
chance to disable the polling if the partition is migrated to a system
that does not support VPHN (and vice versa).
Signed-off-by: Jesse Larrew <jlarrew@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/powerpc/include/asm/topology.h | 10 | ||||
| -rw-r--r-- | arch/powerpc/kernel/rtas.c | 3 |
2 files changed, 13 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/topology.h b/arch/powerpc/include/asm/topology.h index afe4aaa..aed188b 100644 --- a/arch/powerpc/include/asm/topology.h +++ b/arch/powerpc/include/asm/topology.h @@ -93,6 +93,8 @@ extern void __init dump_numa_cpu_topology(void); extern int sysfs_add_device_to_node(struct sys_device *dev, int nid); extern void sysfs_remove_device_from_node(struct sys_device *dev, int nid); +extern int start_topology_update(void); +extern int stop_topology_update(void); #else static inline void dump_numa_cpu_topology(void) {} @@ -107,6 +109,14 @@ static inline void sysfs_remove_device_from_node(struct sys_device *dev, { } +static inline int start_topology_update(void) +{ + return 0; +} +static inline int stop_topology_update(void) +{ + return 0; +} #endif /* CONFIG_NUMA */ #include <asm-generic/topology.h> diff --git a/arch/powerpc/kernel/rtas.c b/arch/powerpc/kernel/rtas.c index 8fe8bc6..2097f2b 100644 --- a/arch/powerpc/kernel/rtas.c +++ b/arch/powerpc/kernel/rtas.c @@ -41,6 +41,7 @@ #include <asm/atomic.h> #include <asm/time.h> #include <asm/mmu.h> +#include <asm/topology.h> struct rtas_t rtas = { .lock = __ARCH_SPIN_LOCK_UNLOCKED @@ -713,6 +714,7 @@ static int __rtas_suspend_last_cpu(struct rtas_suspend_me_data *data, int wake_w int cpu; slb_set_size(SLB_MIN_SIZE); + stop_topology_update(); printk(KERN_DEBUG "calling ibm,suspend-me on cpu %i\n", smp_processor_id()); while (rc == H_MULTI_THREADS_ACTIVE && !atomic_read(&data->done) && @@ -728,6 +730,7 @@ static int __rtas_suspend_last_cpu(struct rtas_suspend_me_data *data, int wake_w rc = atomic_read(&data->error); atomic_set(&data->error, rc); + start_topology_update(); if (wake_when_done) { atomic_set(&data->done, 1); |
