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sysfs: support /sys/devices/system/cpu/offline,online,possible,present

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This commit is contained in:
Yoichi Umezawa
2016-03-04 13:48:06 +09:00
parent 26c0180374
commit 7fac03d4de
2 changed files with 61 additions and 0 deletions
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4
executer/kernel/mcctrl/mcctrl.h
View File

@ -41,6 +41,7 @@
#include <ikc/master.h>
#include <ihk/msr.h>
#include <linux/semaphore.h>
#include <linux/threads.h>
#include "sysfs.h"
#define SCD_MSG_PREPARE_PROCESS 0x1
@ -194,6 +195,8 @@ static inline int sysfs_inited(struct sysfsm_data *sdp)
return !!(sdp->sysfs_buf);
} /* sysfs_inited() */
#define CPU_LONGS (((NR_CPUS) + (BITS_PER_LONG) - 1) / (BITS_PER_LONG))
struct mcctrl_usrdata {
struct ihk_ikc_listen_param listen_param;
struct ihk_ikc_listen_param listen_param2;
@ -213,6 +216,7 @@ struct mcctrl_usrdata {
ihk_spinlock_t per_proc_list_lock;
void **keys;
struct sysfsm_data sysfsm_data;
unsigned long cpu_online[CPU_LONGS];
};
struct mcctrl_signal {

57
executer/kernel/mcctrl/sysfs_files.c
View File

@ -87,6 +87,62 @@ void setup_local_snooping_samples(ihk_os_t os)
return;
}
void setup_local_snooping_files(ihk_os_t os)
{
struct ihk_cpu_info *info;
struct mcctrl_usrdata *udp = ihk_host_os_get_usrdata(os);
struct sysfsm_bitmap_param param;
static unsigned long cpu_offline = 0x0;
int i;
int error;
info = ihk_os_get_cpu_info(os);
if (!info) {
eprintk("mcctrl:ihk_os_get_cpu_info failed.\n");
return;
}
memset(udp->cpu_online, 0, sizeof(udp->cpu_online));
for (i = 0; i < info->n_cpus; i++) {
udp->cpu_online[i / BITS_PER_LONG] =
udp->cpu_online[i / BITS_PER_LONG] | (1 << (i % BITS_PER_LONG));
}
param.nbits = CPU_LONGS * BITS_PER_LONG;
param.ptr = udp->cpu_online;
dprintk("mcctrl:setup_local_snooping_files: CPU_LONGS=%d, BITS_PER_LONG=%d\n",
CPU_LONGS, BITS_PER_LONG);
error = sysfsm_createf(os, SYSFS_SNOOPING_OPS_pbl, &param, 0444,
"/sys/devices/system/cpu/online");
if (error) {
panic("setup_local_snooping_files: devices/system/cpu/online");
}
error = sysfsm_createf(os, SYSFS_SNOOPING_OPS_pbl, &param, 0444,
"/sys/devices/system/cpu/possible");
if (error) {
panic("setup_local_snooping_files: devices/system/cpu/possible");
}
error = sysfsm_createf(os, SYSFS_SNOOPING_OPS_pbl, &param, 0444,
"/sys/devices/system/cpu/present");
if (error) {
panic("setup_local_snooping_files: devices/system/cpu/present");
}
param.nbits = BITS_PER_LONG;
param.ptr = &cpu_offline;
error = sysfsm_createf(os, SYSFS_SNOOPING_OPS_pbl, &param, 0444,
"/sys/devices/system/cpu/offline");
if (error) {
panic("setup_local_snooping_files: devices/system/cpu/offline");
}
return;
}
void setup_sysfs_files(ihk_os_t os)
{
static int a_value = 35;
@ -120,6 +176,7 @@ void setup_sysfs_files(ihk_os_t os)
}
setup_local_snooping_samples(os);
setup_local_snooping_files(os);
return;
} /* setup_files() */