diff options
Diffstat (limited to 'arch/powerpc')
| -rw-r--r-- | arch/powerpc/include/asm/topology.h | 5 | ||||
| -rw-r--r-- | arch/powerpc/kernel/rtasd.c | 7 | ||||
| -rw-r--r-- | arch/powerpc/mm/numa.c | 62 |
3 files changed, 71 insertions, 3 deletions
diff --git a/arch/powerpc/include/asm/topology.h b/arch/powerpc/include/asm/topology.h index 852ed1b384f6..161ab662843b 100644 --- a/arch/powerpc/include/asm/topology.h +++ b/arch/powerpc/include/asm/topology.h @@ -71,6 +71,7 @@ static inline void sysfs_remove_device_from_node(struct device *dev, #if defined(CONFIG_NUMA) && defined(CONFIG_PPC_SPLPAR) extern int start_topology_update(void); extern int stop_topology_update(void); +extern int prrn_is_enabled(void); #else static inline int start_topology_update(void) { @@ -80,6 +81,10 @@ static inline int stop_topology_update(void) { return 0; } +static inline int prrn_is_enabled(void) +{ + return 0; +} #endif /* CONFIG_NUMA && CONFIG_PPC_SPLPAR */ #include <asm-generic/topology.h> diff --git a/arch/powerpc/kernel/rtasd.c b/arch/powerpc/kernel/rtasd.c index 8e52b6d8b6f2..1130c53ad652 100644 --- a/arch/powerpc/kernel/rtasd.c +++ b/arch/powerpc/kernel/rtasd.c @@ -29,6 +29,7 @@ #include <asm/nvram.h> #include <linux/atomic.h> #include <asm/machdep.h> +#include <asm/topology.h> static DEFINE_SPINLOCK(rtasd_log_lock); @@ -292,11 +293,13 @@ void prrn_schedule_update(u32 scope) static void handle_rtas_event(const struct rtas_error_log *log) { - if (log->type == RTAS_TYPE_PRRN) + if (log->type == RTAS_TYPE_PRRN) { /* For PRRN Events the extended log length is used to denote * the scope for calling rtas update-nodes. */ - prrn_schedule_update(log->extended_log_length); + if (prrn_is_enabled()) + prrn_schedule_update(log->extended_log_length); + } return; } diff --git a/arch/powerpc/mm/numa.c b/arch/powerpc/mm/numa.c index 908699fb61c9..2d13f90476bd 100644 --- a/arch/powerpc/mm/numa.c +++ b/arch/powerpc/mm/numa.c @@ -23,6 +23,9 @@ #include <linux/cpuset.h> #include <linux/node.h> #include <linux/stop_machine.h> +#include <linux/proc_fs.h> +#include <linux/seq_file.h> +#include <linux/uaccess.h> #include <asm/sparsemem.h> #include <asm/prom.h> #include <asm/smp.h> @@ -1585,7 +1588,6 @@ int start_topology_update(void) return rc; } -__initcall(start_topology_update); /* * Disable polling for VPHN associativity changes. @@ -1604,4 +1606,62 @@ int stop_topology_update(void) return rc; } + +int prrn_is_enabled(void) +{ + return prrn_enabled; +} + +static int topology_read(struct seq_file *file, void *v) +{ + if (vphn_enabled || prrn_enabled) + seq_puts(file, "on\n"); + else + seq_puts(file, "off\n"); + + return 0; +} + +static int topology_open(struct inode *inode, struct file *file) +{ + return single_open(file, topology_read, NULL); +} + +static ssize_t topology_write(struct file *file, const char __user *buf, + size_t count, loff_t *off) +{ + char kbuf[4]; /* "on" or "off" plus null. */ + int read_len; + + read_len = count < 3 ? count : 3; + if (copy_from_user(kbuf, buf, read_len)) + return -EINVAL; + + kbuf[read_len] = '\0'; + + if (!strncmp(kbuf, "on", 2)) + start_topology_update(); + else if (!strncmp(kbuf, "off", 3)) + stop_topology_update(); + else + return -EINVAL; + + return count; +} + +static const struct file_operations topology_ops = { + .read = seq_read, + .write = topology_write, + .open = topology_open, + .release = single_release +}; + +static int topology_update_init(void) +{ + start_topology_update(); + proc_create("powerpc/topology_updates", 644, NULL, &topology_ops); + + return 0; +} +device_initcall(topology_update_init); #endif /* CONFIG_PPC_SPLPAR */ |