diff options
Diffstat (limited to 'ANDROID_3.4.5/arch/s390/kernel/lgr.c')
-rw-r--r-- | ANDROID_3.4.5/arch/s390/kernel/lgr.c | 200 |
1 files changed, 0 insertions, 200 deletions
diff --git a/ANDROID_3.4.5/arch/s390/kernel/lgr.c b/ANDROID_3.4.5/arch/s390/kernel/lgr.c deleted file mode 100644 index 87f080b1..00000000 --- a/ANDROID_3.4.5/arch/s390/kernel/lgr.c +++ /dev/null @@ -1,200 +0,0 @@ -/* - * Linux Guest Relocation (LGR) detection - * - * Copyright IBM Corp. 2012 - * Author(s): Michael Holzheu <holzheu@linux.vnet.ibm.com> - */ - -#include <linux/module.h> -#include <linux/timer.h> -#include <linux/slab.h> -#include <asm/facility.h> -#include <asm/sysinfo.h> -#include <asm/ebcdic.h> -#include <asm/debug.h> -#include <asm/ipl.h> - -#define LGR_TIMER_INTERVAL_SECS (30 * 60) -#define VM_LEVEL_MAX 2 /* Maximum is 8, but we only record two levels */ - -/* - * LGR info: Contains stfle and stsi data - */ -struct lgr_info { - /* Bit field with facility information: 4 DWORDs are stored */ - u64 stfle_fac_list[4]; - /* Level of system (1 = CEC, 2 = LPAR, 3 = z/VM */ - u32 level; - /* Level 1: CEC info (stsi 1.1.1) */ - char manufacturer[16]; - char type[4]; - char sequence[16]; - char plant[4]; - char model[16]; - /* Level 2: LPAR info (stsi 2.2.2) */ - u16 lpar_number; - char name[8]; - /* Level 3: VM info (stsi 3.2.2) */ - u8 vm_count; - struct { - char name[8]; - char cpi[16]; - } vm[VM_LEVEL_MAX]; -} __packed __aligned(8); - -/* - * LGR globals - */ -static void *lgr_page; -static struct lgr_info lgr_info_last; -static struct lgr_info lgr_info_cur; -static struct debug_info *lgr_dbf; - -/* - * Return number of valid stsi levels - */ -static inline int stsi_0(void) -{ - int rc = stsi(NULL, 0, 0, 0); - - return rc == -ENOSYS ? rc : (((unsigned int) rc) >> 28); -} - -/* - * Copy buffer and then convert it to ASCII - */ -static void cpascii(char *dst, char *src, int size) -{ - memcpy(dst, src, size); - EBCASC(dst, size); -} - -/* - * Fill LGR info with 1.1.1 stsi data - */ -static void lgr_stsi_1_1_1(struct lgr_info *lgr_info) -{ - struct sysinfo_1_1_1 *si = lgr_page; - - if (stsi(si, 1, 1, 1) == -ENOSYS) - return; - cpascii(lgr_info->manufacturer, si->manufacturer, - sizeof(si->manufacturer)); - cpascii(lgr_info->type, si->type, sizeof(si->type)); - cpascii(lgr_info->model, si->model, sizeof(si->model)); - cpascii(lgr_info->sequence, si->sequence, sizeof(si->sequence)); - cpascii(lgr_info->plant, si->plant, sizeof(si->plant)); -} - -/* - * Fill LGR info with 2.2.2 stsi data - */ -static void lgr_stsi_2_2_2(struct lgr_info *lgr_info) -{ - struct sysinfo_2_2_2 *si = lgr_page; - - if (stsi(si, 2, 2, 2) == -ENOSYS) - return; - cpascii(lgr_info->name, si->name, sizeof(si->name)); - memcpy(&lgr_info->lpar_number, &si->lpar_number, - sizeof(lgr_info->lpar_number)); -} - -/* - * Fill LGR info with 3.2.2 stsi data - */ -static void lgr_stsi_3_2_2(struct lgr_info *lgr_info) -{ - struct sysinfo_3_2_2 *si = lgr_page; - int i; - - if (stsi(si, 3, 2, 2) == -ENOSYS) - return; - for (i = 0; i < min_t(u8, si->count, VM_LEVEL_MAX); i++) { - cpascii(lgr_info->vm[i].name, si->vm[i].name, - sizeof(si->vm[i].name)); - cpascii(lgr_info->vm[i].cpi, si->vm[i].cpi, - sizeof(si->vm[i].cpi)); - } - lgr_info->vm_count = si->count; -} - -/* - * Fill LGR info with current data - */ -static void lgr_info_get(struct lgr_info *lgr_info) -{ - memset(lgr_info, 0, sizeof(*lgr_info)); - stfle(lgr_info->stfle_fac_list, ARRAY_SIZE(lgr_info->stfle_fac_list)); - lgr_info->level = stsi_0(); - if (lgr_info->level == -ENOSYS) - return; - if (lgr_info->level >= 1) - lgr_stsi_1_1_1(lgr_info); - if (lgr_info->level >= 2) - lgr_stsi_2_2_2(lgr_info); - if (lgr_info->level >= 3) - lgr_stsi_3_2_2(lgr_info); -} - -/* - * Check if LGR info has changed and if yes log new LGR info to s390dbf - */ -void lgr_info_log(void) -{ - static DEFINE_SPINLOCK(lgr_info_lock); - unsigned long flags; - - if (!spin_trylock_irqsave(&lgr_info_lock, flags)) - return; - lgr_info_get(&lgr_info_cur); - if (memcmp(&lgr_info_last, &lgr_info_cur, sizeof(lgr_info_cur)) != 0) { - debug_event(lgr_dbf, 1, &lgr_info_cur, sizeof(lgr_info_cur)); - lgr_info_last = lgr_info_cur; - } - spin_unlock_irqrestore(&lgr_info_lock, flags); -} -EXPORT_SYMBOL_GPL(lgr_info_log); - -static void lgr_timer_set(void); - -/* - * LGR timer callback - */ -static void lgr_timer_fn(unsigned long ignored) -{ - lgr_info_log(); - lgr_timer_set(); -} - -static struct timer_list lgr_timer = - TIMER_DEFERRED_INITIALIZER(lgr_timer_fn, 0, 0); - -/* - * Setup next LGR timer - */ -static void lgr_timer_set(void) -{ - mod_timer(&lgr_timer, jiffies + LGR_TIMER_INTERVAL_SECS * HZ); -} - -/* - * Initialize LGR: Add s390dbf, write initial lgr_info and setup timer - */ -static int __init lgr_init(void) -{ - lgr_page = (void *) __get_free_pages(GFP_KERNEL, 0); - if (!lgr_page) - return -ENOMEM; - lgr_dbf = debug_register("lgr", 1, 1, sizeof(struct lgr_info)); - if (!lgr_dbf) { - free_page((unsigned long) lgr_page); - return -ENOMEM; - } - debug_register_view(lgr_dbf, &debug_hex_ascii_view); - lgr_info_get(&lgr_info_last); - debug_event(lgr_dbf, 1, &lgr_info_last, sizeof(lgr_info_last)); - lgr_timer_set(); - return 0; -} -module_init(lgr_init); |