DECLARE_PER_CPU(struct s390_idle_data, s390_idle);
-void vtime_start_cpu(void);
+void vtime_start_cpu(__u64 int_clock, __u64 enter_timer);
cputime64_t s390_get_idle_time(int cpu);
#define arch_idle_time(cpu) s390_get_idle_time(cpu)
-static inline void s390_idle_check(void)
+static inline void s390_idle_check(struct pt_regs *regs, __u64 int_clock,
+ __u64 enter_timer)
{
- if ((&__get_cpu_var(s390_idle))->idle_enter != 0ULL)
- vtime_start_cpu();
+ if (regs->psw.mask & PSW_MASK_WAIT)
+ vtime_start_cpu(int_clock, enter_timer);
}
static inline int s390_nohz_delay(int cpu)
/* CPU time accounting values */
__u64 sync_enter_timer; /* 0x0250 */
__u64 async_enter_timer; /* 0x0258 */
- __u64 exit_timer; /* 0x0260 */
- __u64 user_timer; /* 0x0268 */
- __u64 system_timer; /* 0x0270 */
- __u64 steal_timer; /* 0x0278 */
- __u64 last_update_timer; /* 0x0280 */
- __u64 last_update_clock; /* 0x0288 */
+ __u64 mcck_enter_timer; /* 0x0260 */
+ __u64 exit_timer; /* 0x0268 */
+ __u64 user_timer; /* 0x0270 */
+ __u64 system_timer; /* 0x0278 */
+ __u64 steal_timer; /* 0x0280 */
+ __u64 last_update_timer; /* 0x0288 */
+ __u64 last_update_clock; /* 0x0290 */
/* Current process. */
- __u32 current_task; /* 0x0290 */
- __u32 thread_info; /* 0x0294 */
- __u32 kernel_stack; /* 0x0298 */
+ __u32 current_task; /* 0x0298 */
+ __u32 thread_info; /* 0x029c */
+ __u32 kernel_stack; /* 0x02a0 */
/* Interrupt and panic stack. */
- __u32 async_stack; /* 0x029c */
- __u32 panic_stack; /* 0x02a0 */
+ __u32 async_stack; /* 0x02a4 */
+ __u32 panic_stack; /* 0x02a8 */
/* Address space pointer. */
- __u32 kernel_asce; /* 0x02a4 */
- __u32 user_asce; /* 0x02a8 */
- __u32 user_exec_asce; /* 0x02ac */
+ __u32 kernel_asce; /* 0x02ac */
+ __u32 user_asce; /* 0x02b0 */
+ __u32 user_exec_asce; /* 0x02b4 */
/* SMP info area */
- __u32 cpu_nr; /* 0x02b0 */
- __u32 softirq_pending; /* 0x02b4 */
- __u32 percpu_offset; /* 0x02b8 */
- __u32 ext_call_fast; /* 0x02bc */
- __u64 int_clock; /* 0x02c0 */
- __u64 clock_comparator; /* 0x02c8 */
- __u32 machine_flags; /* 0x02d0 */
- __u32 ftrace_func; /* 0x02d4 */
- __u8 pad_0x02d8[0x0300-0x02d8]; /* 0x02d8 */
+ __u32 cpu_nr; /* 0x02b8 */
+ __u32 softirq_pending; /* 0x02bc */
+ __u32 percpu_offset; /* 0x02c0 */
+ __u32 ext_call_fast; /* 0x02c4 */
+ __u64 int_clock; /* 0x02c8 */
+ __u64 mcck_clock; /* 0x02d0 */
+ __u64 clock_comparator; /* 0x02d8 */
+ __u32 machine_flags; /* 0x02e0 */
+ __u32 ftrace_func; /* 0x02e4 */
+ __u8 pad_0x02e8[0x0300-0x02e8]; /* 0x02e8 */
/* Interrupt response block */
__u8 irb[64]; /* 0x0300 */
/* CPU accounting and timing values. */
__u64 sync_enter_timer; /* 0x02a0 */
__u64 async_enter_timer; /* 0x02a8 */
- __u64 exit_timer; /* 0x02b0 */
- __u64 user_timer; /* 0x02b8 */
- __u64 system_timer; /* 0x02c0 */
- __u64 steal_timer; /* 0x02c8 */
- __u64 last_update_timer; /* 0x02d0 */
- __u64 last_update_clock; /* 0x02d8 */
+ __u64 mcck_enter_timer; /* 0x02b0 */
+ __u64 exit_timer; /* 0x02b8 */
+ __u64 user_timer; /* 0x02c0 */
+ __u64 system_timer; /* 0x02c8 */
+ __u64 steal_timer; /* 0x02d0 */
+ __u64 last_update_timer; /* 0x02d8 */
+ __u64 last_update_clock; /* 0x02e0 */
/* Current process. */
- __u64 current_task; /* 0x02e0 */
- __u64 thread_info; /* 0x02e8 */
- __u64 kernel_stack; /* 0x02f0 */
+ __u64 current_task; /* 0x02e8 */
+ __u64 thread_info; /* 0x02f0 */
+ __u64 kernel_stack; /* 0x02f8 */
/* Interrupt and panic stack. */
- __u64 async_stack; /* 0x02f8 */
- __u64 panic_stack; /* 0x0300 */
+ __u64 async_stack; /* 0x0300 */
+ __u64 panic_stack; /* 0x0308 */
/* Address space pointer. */
- __u64 kernel_asce; /* 0x0308 */
- __u64 user_asce; /* 0x0310 */
- __u64 user_exec_asce; /* 0x0318 */
+ __u64 kernel_asce; /* 0x0310 */
+ __u64 user_asce; /* 0x0318 */
+ __u64 user_exec_asce; /* 0x0320 */
/* SMP info area */
- __u32 cpu_nr; /* 0x0320 */
- __u32 softirq_pending; /* 0x0324 */
- __u64 percpu_offset; /* 0x0328 */
- __u64 ext_call_fast; /* 0x0330 */
- __u64 int_clock; /* 0x0338 */
- __u64 clock_comparator; /* 0x0340 */
- __u64 vdso_per_cpu_data; /* 0x0348 */
- __u64 machine_flags; /* 0x0350 */
- __u64 ftrace_func; /* 0x0358 */
- __u8 pad_0x0368[0x0380-0x0360]; /* 0x0360 */
+ __u32 cpu_nr; /* 0x0328 */
+ __u32 softirq_pending; /* 0x032c */
+ __u64 percpu_offset; /* 0x0330 */
+ __u64 ext_call_fast; /* 0x0338 */
+ __u64 int_clock; /* 0x0340 */
+ __u64 mcck_clock; /* 0x0348 */
+ __u64 clock_comparator; /* 0x0350 */
+ __u64 vdso_per_cpu_data; /* 0x0358 */
+ __u64 machine_flags; /* 0x0360 */
+ __u64 ftrace_func; /* 0x0368 */
+ __u8 pad_0x0370[0x0380-0x0370]; /* 0x0370 */
/* Interrupt response block. */
__u8 irb[64]; /* 0x0380 */
DEFINE(__LC_RETURN_MCCK_PSW, offsetof(struct _lowcore, return_mcck_psw));
DEFINE(__LC_SYNC_ENTER_TIMER, offsetof(struct _lowcore, sync_enter_timer));
DEFINE(__LC_ASYNC_ENTER_TIMER, offsetof(struct _lowcore, async_enter_timer));
+ DEFINE(__LC_MCCK_ENTER_TIMER, offsetof(struct _lowcore, mcck_enter_timer));
DEFINE(__LC_EXIT_TIMER, offsetof(struct _lowcore, exit_timer));
DEFINE(__LC_USER_TIMER, offsetof(struct _lowcore, user_timer));
DEFINE(__LC_SYSTEM_TIMER, offsetof(struct _lowcore, system_timer));
DEFINE(__LC_USER_ASCE, offsetof(struct _lowcore, user_asce));
DEFINE(__LC_USER_EXEC_ASCE, offsetof(struct _lowcore, user_exec_asce));
DEFINE(__LC_INT_CLOCK, offsetof(struct _lowcore, int_clock));
+ DEFINE(__LC_MCCK_CLOCK, offsetof(struct _lowcore, mcck_clock));
DEFINE(__LC_MACHINE_FLAGS, offsetof(struct _lowcore, machine_flags));
DEFINE(__LC_FTRACE_FUNC, offsetof(struct _lowcore, ftrace_func));
DEFINE(__LC_IRB, offsetof(struct _lowcore, irb));
.globl mcck_int_handler
mcck_int_handler:
- stck __LC_INT_CLOCK
+ stck __LC_MCCK_CLOCK
spt __LC_CPU_TIMER_SAVE_AREA # revalidate cpu timer
lm %r0,%r15,__LC_GPREGS_SAVE_AREA # revalidate gprs
SAVE_ALL_BASE __LC_SAVE_AREA+32
la %r12,__LC_MCK_OLD_PSW
tm __LC_MCCK_CODE,0x80 # system damage?
bo BASED(mcck_int_main) # yes -> rest of mcck code invalid
- mvc __LC_SAVE_AREA+52(8),__LC_ASYNC_ENTER_TIMER
- mvc __LC_ASYNC_ENTER_TIMER(8),__LC_CPU_TIMER_SAVE_AREA
+ mvc __LC_MCCK_ENTER_TIMER(8),__LC_CPU_TIMER_SAVE_AREA
tm __LC_MCCK_CODE+5,0x02 # stored cpu timer value valid?
bo BASED(1f)
la %r14,__LC_SYNC_ENTER_TIMER
bl BASED(0f)
la %r14,__LC_LAST_UPDATE_TIMER
0: spt 0(%r14)
- mvc __LC_ASYNC_ENTER_TIMER(8),0(%r14)
+ mvc __LC_MCCK_ENTER_TIMER(8),0(%r14)
1: tm __LC_MCCK_CODE+2,0x09 # mwp + ia of old psw valid?
bno BASED(mcck_int_main) # no -> skip cleanup critical
tm __LC_MCK_OLD_PSW+1,0x01 # test problem state bit
bno BASED(mcck_no_vtime) # no -> skip cleanup critical
tm SP_PSW+1(%r15),0x01 # interrupting from user ?
bz BASED(mcck_no_vtime)
- UPDATE_VTIME __LC_EXIT_TIMER,__LC_ASYNC_ENTER_TIMER,__LC_USER_TIMER
+ UPDATE_VTIME __LC_EXIT_TIMER,__LC_MCCK_ENTER_TIMER,__LC_USER_TIMER
UPDATE_VTIME __LC_LAST_UPDATE_TIMER,__LC_EXIT_TIMER,__LC_SYSTEM_TIMER
- mvc __LC_LAST_UPDATE_TIMER(8),__LC_ASYNC_ENTER_TIMER
+ mvc __LC_LAST_UPDATE_TIMER(8),__LC_MCCK_ENTER_TIMER
mcck_no_vtime:
l %r9,__LC_THREAD_INFO # load pointer to thread_info struct
la %r2,SP_PTREGS(%r15) # load pt_regs
mcck_return:
mvc __LC_RETURN_MCCK_PSW(8),SP_PSW(%r15) # move return PSW
ni __LC_RETURN_MCCK_PSW+1,0xfd # clear wait state bit
- mvc __LC_ASYNC_ENTER_TIMER(8),__LC_SAVE_AREA+52
tm __LC_RETURN_MCCK_PSW+1,0x01 # returning to user ?
bno BASED(0f)
lm %r0,%r15,SP_R0(%r15) # load gprs 0-15
cleanup_system_call:
mvc __LC_RETURN_PSW(8),0(%r12)
- c %r12,BASED(.Lmck_old_psw)
- be BASED(0f)
- la %r12,__LC_SAVE_AREA+16
- b BASED(1f)
-0: la %r12,__LC_SAVE_AREA+32
-1:
clc __LC_RETURN_PSW+4(4),BASED(cleanup_system_call_insn+4)
bh BASED(0f)
+ mvc __LC_SYNC_ENTER_TIMER(8),__LC_MCCK_ENTER_TIMER
+ c %r12,BASED(.Lmck_old_psw)
+ be BASED(0f)
mvc __LC_SYNC_ENTER_TIMER(8),__LC_ASYNC_ENTER_TIMER
+0: c %r12,BASED(.Lmck_old_psw)
+ la %r12,__LC_SAVE_AREA+32
+ be BASED(0f)
+ la %r12,__LC_SAVE_AREA+16
0: clc __LC_RETURN_PSW+4(4),BASED(cleanup_system_call_insn+8)
bhe BASED(cleanup_vtime)
clc __LC_RETURN_PSW+4(4),BASED(cleanup_system_call_insn)
cleanup_sysc_restore:
clc 4(4,%r12),BASED(cleanup_sysc_restore_insn)
be BASED(2f)
+ mvc __LC_EXIT_TIMER(8),__LC_MCCK_ENTER_TIMER
+ c %r12,BASED(.Lmck_old_psw)
+ be BASED(0f)
mvc __LC_EXIT_TIMER(8),__LC_ASYNC_ENTER_TIMER
- clc 4(4,%r12),BASED(cleanup_sysc_restore_insn+4)
+0: clc 4(4,%r12),BASED(cleanup_sysc_restore_insn+4)
be BASED(2f)
mvc __LC_RETURN_PSW(8),SP_PSW(%r15)
c %r12,BASED(.Lmck_old_psw)
- bne BASED(0f)
- mvc __LC_SAVE_AREA+32(16),SP_R12(%r15)
- b BASED(1f)
-0: mvc __LC_SAVE_AREA+16(16),SP_R12(%r15)
-1: lm %r0,%r11,SP_R0(%r15)
+ la %r12,__LC_SAVE_AREA+32
+ be BASED(1f)
+ la %r12,__LC_SAVE_AREA+16
+1: mvc 0(16,%r12),SP_R12(%r15)
+ lm %r0,%r11,SP_R0(%r15)
l %r15,SP_R15(%r15)
2: la %r12,__LC_RETURN_PSW
br %r14
cleanup_io_restore:
clc 4(4,%r12),BASED(cleanup_io_restore_insn)
- be BASED(2f)
- mvc __LC_EXIT_TIMER(8),__LC_ASYNC_ENTER_TIMER
+ be BASED(1f)
+ mvc __LC_EXIT_TIMER(8),__LC_MCCK_ENTER_TIMER
clc 4(4,%r12),BASED(cleanup_io_restore_insn+4)
- be BASED(2f)
+ be BASED(1f)
mvc __LC_RETURN_PSW(8),SP_PSW(%r15)
- c %r12,BASED(.Lmck_old_psw)
- bne BASED(0f)
mvc __LC_SAVE_AREA+32(16),SP_R12(%r15)
- b BASED(1f)
-0: mvc __LC_SAVE_AREA+16(16),SP_R12(%r15)
-1: lm %r0,%r11,SP_R0(%r15)
+ lm %r0,%r11,SP_R0(%r15)
l %r15,SP_R15(%r15)
-2: la %r12,__LC_RETURN_PSW
+1: la %r12,__LC_RETURN_PSW
br %r14
cleanup_io_restore_insn:
.long io_done - 4 + 0x80000000
*/
.globl mcck_int_handler
mcck_int_handler:
- stck __LC_INT_CLOCK
+ stck __LC_MCCK_CLOCK
la %r1,4095 # revalidate r1
spt __LC_CPU_TIMER_SAVE_AREA-4095(%r1) # revalidate cpu timer
lmg %r0,%r15,__LC_GPREGS_SAVE_AREA-4095(%r1)# revalidate gprs
tm __LC_MCCK_CODE,0x80 # system damage?
jo mcck_int_main # yes -> rest of mcck code invalid
la %r14,4095
- mvc __LC_SAVE_AREA+104(8),__LC_ASYNC_ENTER_TIMER
- mvc __LC_ASYNC_ENTER_TIMER(8),__LC_CPU_TIMER_SAVE_AREA-4095(%r14)
+ mvc __LC_MCCK_ENTER_TIMER(8),__LC_CPU_TIMER_SAVE_AREA-4095(%r14)
tm __LC_MCCK_CODE+5,0x02 # stored cpu timer value valid?
jo 1f
la %r14,__LC_SYNC_ENTER_TIMER
jl 0f
la %r14,__LC_LAST_UPDATE_TIMER
0: spt 0(%r14)
- mvc __LC_ASYNC_ENTER_TIMER(8),0(%r14)
+ mvc __LC_MCCK_ENTER_TIMER(8),0(%r14)
1: tm __LC_MCCK_CODE+2,0x09 # mwp + ia of old psw valid?
jno mcck_int_main # no -> skip cleanup critical
tm __LC_MCK_OLD_PSW+1,0x01 # test problem state bit
jno mcck_no_vtime # no -> no timer update
tm SP_PSW+1(%r15),0x01 # interrupting from user ?
jz mcck_no_vtime
- UPDATE_VTIME __LC_EXIT_TIMER,__LC_ASYNC_ENTER_TIMER,__LC_USER_TIMER
+ UPDATE_VTIME __LC_EXIT_TIMER,__LC_MCCK_ENTER_TIMER,__LC_USER_TIMER
UPDATE_VTIME __LC_LAST_UPDATE_TIMER,__LC_EXIT_TIMER,__LC_SYSTEM_TIMER
- mvc __LC_LAST_UPDATE_TIMER(8),__LC_ASYNC_ENTER_TIMER
+ mvc __LC_LAST_UPDATE_TIMER(8),__LC_MCCK_ENTER_TIMER
mcck_no_vtime:
lg %r9,__LC_THREAD_INFO # load pointer to thread_info struct
la %r2,SP_PTREGS(%r15) # load pt_regs
mvc __LC_RETURN_MCCK_PSW(16),SP_PSW(%r15) # move return PSW
ni __LC_RETURN_MCCK_PSW+1,0xfd # clear wait state bit
lmg %r0,%r15,SP_R0(%r15) # load gprs 0-15
- mvc __LC_ASYNC_ENTER_TIMER(8),__LC_SAVE_AREA+104
tm __LC_RETURN_MCCK_PSW+1,0x01 # returning to user ?
jno 0f
stpt __LC_EXIT_TIMER
cleanup_system_call:
mvc __LC_RETURN_PSW(16),0(%r12)
- cghi %r12,__LC_MCK_OLD_PSW
- je 0f
- la %r12,__LC_SAVE_AREA+32
- j 1f
-0: la %r12,__LC_SAVE_AREA+64
-1:
clc __LC_RETURN_PSW+8(8),BASED(cleanup_system_call_insn+8)
jh 0f
+ mvc __LC_SYNC_ENTER_TIMER(8),__LC_MCCK_ENTER_TIMER
+ cghi %r12,__LC_MCK_OLD_PSW
+ je 0f
mvc __LC_SYNC_ENTER_TIMER(8),__LC_ASYNC_ENTER_TIMER
+0: cghi %r12,__LC_MCK_OLD_PSW
+ la %r12,__LC_SAVE_AREA+64
+ je 0f
+ la %r12,__LC_SAVE_AREA+32
0: clc __LC_RETURN_PSW+8(8),BASED(cleanup_system_call_insn+16)
jhe cleanup_vtime
clc __LC_RETURN_PSW+8(8),BASED(cleanup_system_call_insn)
cleanup_sysc_restore:
clc 8(8,%r12),BASED(cleanup_sysc_restore_insn)
- je 3f
+ je 2f
clc 8(8,%r12),BASED(cleanup_sysc_restore_insn+8)
jhe 0f
+ mvc __LC_EXIT_TIMER(8),__LC_MCCK_ENTER_TIMER
+ cghi %r12,__LC_MCK_OLD_PSW
+ je 0f
mvc __LC_EXIT_TIMER(8),__LC_ASYNC_ENTER_TIMER
0: mvc __LC_RETURN_PSW(16),SP_PSW(%r15)
cghi %r12,__LC_MCK_OLD_PSW
- jne 1f
- mvc __LC_SAVE_AREA+64(32),SP_R12(%r15)
- j 2f
-1: mvc __LC_SAVE_AREA+32(32),SP_R12(%r15)
-2: lmg %r0,%r11,SP_R0(%r15)
+ la %r12,__LC_SAVE_AREA+64
+ je 1f
+ la %r12,__LC_SAVE_AREA+32
+1: mvc 0(32,%r12),SP_R12(%r15)
+ lmg %r0,%r11,SP_R0(%r15)
lg %r15,SP_R15(%r15)
-3: la %r12,__LC_RETURN_PSW
+2: la %r12,__LC_RETURN_PSW
br %r14
cleanup_sysc_restore_insn:
.quad sysc_done - 4
cleanup_io_restore:
clc 8(8,%r12),BASED(cleanup_io_restore_insn)
- je 3f
+ je 1f
clc 8(8,%r12),BASED(cleanup_io_restore_insn+8)
jhe 0f
- mvc __LC_EXIT_TIMER(8),__LC_ASYNC_ENTER_TIMER
+ mvc __LC_EXIT_TIMER(8),__LC_MCCK_ENTER_TIMER
0: mvc __LC_RETURN_PSW(16),SP_PSW(%r15)
- cghi %r12,__LC_MCK_OLD_PSW
- jne 1f
mvc __LC_SAVE_AREA+64(32),SP_R12(%r15)
- j 2f
-1: mvc __LC_SAVE_AREA+32(32),SP_R12(%r15)
-2: lmg %r0,%r11,SP_R0(%r15)
+ lmg %r0,%r11,SP_R0(%r15)
lg %r15,SP_R15(%r15)
-3: la %r12,__LC_RETURN_PSW
+1: la %r12,__LC_RETURN_PSW
br %r14
cleanup_io_restore_insn:
.quad io_done - 4
int umode;
nmi_enter();
- s390_idle_check();
+ s390_idle_check(regs, S390_lowcore.mcck_clock,
+ S390_lowcore.mcck_enter_timer);
mci = (struct mci *) &S390_lowcore.mcck_interruption_code;
mcck = &__get_cpu_var(cpu_mcck);
struct pt_regs *old_regs;
old_regs = set_irq_regs(regs);
- s390_idle_check();
+ s390_idle_check(regs, S390_lowcore.int_clock,
+ S390_lowcore.async_enter_timer);
irq_enter();
if (S390_lowcore.int_clock >= S390_lowcore.clock_comparator)
/* Serve timer interrupts first. */
}
EXPORT_SYMBOL_GPL(account_system_vtime);
-void vtime_start_cpu(void)
+void vtime_start_cpu(__u64 int_clock, __u64 enter_timer)
{
struct s390_idle_data *idle = &__get_cpu_var(s390_idle);
struct vtimer_queue *vq = &__get_cpu_var(virt_cpu_timer);
__u64 idle_time, expires;
+ if (idle->idle_enter == 0ULL)
+ return;
+
/* Account time spent with enabled wait psw loaded as idle time. */
- idle_time = S390_lowcore.int_clock - idle->idle_enter;
+ idle_time = int_clock - idle->idle_enter;
account_idle_time(idle_time);
S390_lowcore.steal_timer +=
idle->idle_enter - S390_lowcore.last_update_clock;
- S390_lowcore.last_update_clock = S390_lowcore.int_clock;
+ S390_lowcore.last_update_clock = int_clock;
/* Account system time spent going idle. */
S390_lowcore.system_timer += S390_lowcore.last_update_timer - vq->idle;
- S390_lowcore.last_update_timer = S390_lowcore.async_enter_timer;
+ S390_lowcore.last_update_timer = enter_timer;
/* Restart vtime CPU timer */
if (vq->do_spt) {
/* Program old expire value but first save progress. */
- expires = vq->idle - S390_lowcore.async_enter_timer;
+ expires = vq->idle - enter_timer;
expires += get_vtimer();
set_vtimer(expires);
} else {
/* Don't account the CPU timer delta while the cpu was idle. */
- vq->elapsed -= vq->idle - S390_lowcore.async_enter_timer;
+ vq->elapsed -= vq->idle - enter_timer;
}
idle->sequence++;
struct pt_regs *old_regs;
old_regs = set_irq_regs(regs);
- s390_idle_check();
+ s390_idle_check(regs, S390_lowcore.int_clock,
+ S390_lowcore.async_enter_timer);
irq_enter();
__get_cpu_var(s390_idle).nohz_delay = 1;
if (S390_lowcore.int_clock >= S390_lowcore.clock_comparator)
git://ftp.safe.ca / safe / jmp / linux-2.6 / commitdiff