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s390: use local symbol names in entry[64].S

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To improve the output of the perf tool hide most of the symbols
from entry[64].S by using the '.L' prefix.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Martin Schwidefsky 2014-12-03 17:00:08 +01:00
parent 7490daf01f
commit 86ed42f401
2 changed files with 398 additions and 398 deletions
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424
arch/s390/kernel/entry.S
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@ -53,7 +53,7 @@ _PIF_WORK = (_PIF_PER_TRAP)
.macro TRACE_IRQS_ON .macro TRACE_IRQS_ON
#ifdef CONFIG_TRACE_IRQFLAGS #ifdef CONFIG_TRACE_IRQFLAGS
basr %r2,%r0 basr %r2,%r0
l %r1,BASED(.Lhardirqs_on) l %r1,BASED(.Lc_hardirqs_on)
basr %r14,%r1 # call trace_hardirqs_on_caller basr %r14,%r1 # call trace_hardirqs_on_caller
#endif #endif
.endm .endm
@ -61,7 +61,7 @@ _PIF_WORK = (_PIF_PER_TRAP)
.macro TRACE_IRQS_OFF .macro TRACE_IRQS_OFF
#ifdef CONFIG_TRACE_IRQFLAGS #ifdef CONFIG_TRACE_IRQFLAGS
basr %r2,%r0 basr %r2,%r0
l %r1,BASED(.Lhardirqs_off) l %r1,BASED(.Lc_hardirqs_off)
basr %r14,%r1 # call trace_hardirqs_off_caller basr %r14,%r1 # call trace_hardirqs_off_caller
#endif #endif
.endm .endm
@ -70,7 +70,7 @@ _PIF_WORK = (_PIF_PER_TRAP)
#ifdef CONFIG_LOCKDEP #ifdef CONFIG_LOCKDEP
tm __PT_PSW+1(%r11),0x01 # returning to user ? tm __PT_PSW+1(%r11),0x01 # returning to user ?
jz .+10 jz .+10
l %r1,BASED(.Llockdep_sys_exit) l %r1,BASED(.Lc_lockdep_sys_exit)
basr %r14,%r1 # call lockdep_sys_exit basr %r14,%r1 # call lockdep_sys_exit
#endif #endif
.endm .endm
@ -87,8 +87,8 @@ _PIF_WORK = (_PIF_PER_TRAP)
tmh %r8,0x0001 # interrupting from user ? tmh %r8,0x0001 # interrupting from user ?
jnz 1f jnz 1f
lr %r14,%r9 lr %r14,%r9
sl %r14,BASED(.Lcritical_start) sl %r14,BASED(.Lc_critical_start)
cl %r14,BASED(.Lcritical_length) cl %r14,BASED(.Lc_critical_length)
jhe 0f jhe 0f
la %r11,\savearea # inside critical section, do cleanup la %r11,\savearea # inside critical section, do cleanup
bras %r14,cleanup_critical bras %r14,cleanup_critical
@ -162,7 +162,7 @@ ENTRY(__switch_to)
lm %r6,%r15,__SF_GPRS(%r15) # load gprs of next task lm %r6,%r15,__SF_GPRS(%r15) # load gprs of next task
br %r14 br %r14
__critical_start: .L__critical_start:
/* /*
* SVC interrupt handler routine. System calls are synchronous events and * SVC interrupt handler routine. System calls are synchronous events and
* are executed with interrupts enabled. * are executed with interrupts enabled.
@ -170,145 +170,145 @@ __critical_start:
ENTRY(system_call) ENTRY(system_call)
stpt __LC_SYNC_ENTER_TIMER stpt __LC_SYNC_ENTER_TIMER
sysc_stm: .Lsysc_stm:
stm %r8,%r15,__LC_SAVE_AREA_SYNC stm %r8,%r15,__LC_SAVE_AREA_SYNC
l %r12,__LC_THREAD_INFO l %r12,__LC_THREAD_INFO
l %r13,__LC_SVC_NEW_PSW+4 l %r13,__LC_SVC_NEW_PSW+4
lhi %r14,_PIF_SYSCALL lhi %r14,_PIF_SYSCALL
sysc_per: .Lsysc_per:
l %r15,__LC_KERNEL_STACK l %r15,__LC_KERNEL_STACK
la %r11,STACK_FRAME_OVERHEAD(%r15) # pointer to pt_regs la %r11,STACK_FRAME_OVERHEAD(%r15) # pointer to pt_regs
sysc_vtime: .Lsysc_vtime:
UPDATE_VTIME %r8,%r9,__LC_SYNC_ENTER_TIMER UPDATE_VTIME %r8,%r9,__LC_SYNC_ENTER_TIMER
stm %r0,%r7,__PT_R0(%r11) stm %r0,%r7,__PT_R0(%r11)
mvc __PT_R8(32,%r11),__LC_SAVE_AREA_SYNC mvc __PT_R8(32,%r11),__LC_SAVE_AREA_SYNC
mvc __PT_PSW(8,%r11),__LC_SVC_OLD_PSW mvc __PT_PSW(8,%r11),__LC_SVC_OLD_PSW
mvc __PT_INT_CODE(4,%r11),__LC_SVC_ILC mvc __PT_INT_CODE(4,%r11),__LC_SVC_ILC
st %r14,__PT_FLAGS(%r11) st %r14,__PT_FLAGS(%r11)
sysc_do_svc: .Lsysc_do_svc:
l %r10,__TI_sysc_table(%r12) # 31 bit system call table l %r10,__TI_sysc_table(%r12) # 31 bit system call table
lh %r8,__PT_INT_CODE+2(%r11) lh %r8,__PT_INT_CODE+2(%r11)
sla %r8,2 # shift and test for svc0 sla %r8,2 # shift and test for svc0
jnz sysc_nr_ok jnz .Lsysc_nr_ok
# svc 0: system call number in %r1 # svc 0: system call number in %r1
cl %r1,BASED(.Lnr_syscalls) cl %r1,BASED(.Lnr_syscalls)
jnl sysc_nr_ok jnl .Lsysc_nr_ok
sth %r1,__PT_INT_CODE+2(%r11) sth %r1,__PT_INT_CODE+2(%r11)
lr %r8,%r1 lr %r8,%r1
sla %r8,2 sla %r8,2
sysc_nr_ok: .Lsysc_nr_ok:
xc __SF_BACKCHAIN(4,%r15),__SF_BACKCHAIN(%r15) xc __SF_BACKCHAIN(4,%r15),__SF_BACKCHAIN(%r15)
st %r2,__PT_ORIG_GPR2(%r11) st %r2,__PT_ORIG_GPR2(%r11)
st %r7,STACK_FRAME_OVERHEAD(%r15) st %r7,STACK_FRAME_OVERHEAD(%r15)
l %r9,0(%r8,%r10) # get system call addr. l %r9,0(%r8,%r10) # get system call addr.
tm __TI_flags+3(%r12),_TIF_TRACE tm __TI_flags+3(%r12),_TIF_TRACE
jnz sysc_tracesys jnz .Lsysc_tracesys
basr %r14,%r9 # call sys_xxxx basr %r14,%r9 # call sys_xxxx
st %r2,__PT_R2(%r11) # store return value st %r2,__PT_R2(%r11) # store return value
sysc_return: .Lsysc_return:
LOCKDEP_SYS_EXIT LOCKDEP_SYS_EXIT
sysc_tif: .Lsysc_tif:
tm __PT_PSW+1(%r11),0x01 # returning to user ? tm __PT_PSW+1(%r11),0x01 # returning to user ?
jno sysc_restore jno .Lsysc_restore
tm __PT_FLAGS+3(%r11),_PIF_WORK tm __PT_FLAGS+3(%r11),_PIF_WORK
jnz sysc_work jnz .Lsysc_work
tm __TI_flags+3(%r12),_TIF_WORK tm __TI_flags+3(%r12),_TIF_WORK
jnz sysc_work # check for thread work jnz .Lsysc_work # check for thread work
tm __LC_CPU_FLAGS+3,_CIF_WORK tm __LC_CPU_FLAGS+3,_CIF_WORK
jnz sysc_work jnz .Lsysc_work
sysc_restore: .Lsysc_restore:
mvc __LC_RETURN_PSW(8),__PT_PSW(%r11) mvc __LC_RETURN_PSW(8),__PT_PSW(%r11)
stpt __LC_EXIT_TIMER stpt __LC_EXIT_TIMER
lm %r0,%r15,__PT_R0(%r11) lm %r0,%r15,__PT_R0(%r11)
lpsw __LC_RETURN_PSW lpsw __LC_RETURN_PSW
sysc_done: .Lsysc_done:
# #
# One of the work bits is on. Find out which one. # One of the work bits is on. Find out which one.
# #
sysc_work: .Lsysc_work:
tm __LC_CPU_FLAGS+3,_CIF_MCCK_PENDING tm __LC_CPU_FLAGS+3,_CIF_MCCK_PENDING
jo sysc_mcck_pending jo .Lsysc_mcck_pending
tm __TI_flags+3(%r12),_TIF_NEED_RESCHED tm __TI_flags+3(%r12),_TIF_NEED_RESCHED
jo sysc_reschedule jo .Lsysc_reschedule
tm __PT_FLAGS+3(%r11),_PIF_PER_TRAP tm __PT_FLAGS+3(%r11),_PIF_PER_TRAP
jo sysc_singlestep jo .Lsysc_singlestep
tm __TI_flags+3(%r12),_TIF_SIGPENDING tm __TI_flags+3(%r12),_TIF_SIGPENDING
jo sysc_sigpending jo .Lsysc_sigpending
tm __TI_flags+3(%r12),_TIF_NOTIFY_RESUME tm __TI_flags+3(%r12),_TIF_NOTIFY_RESUME
jo sysc_notify_resume jo .Lsysc_notify_resume
tm __LC_CPU_FLAGS+3,_CIF_ASCE tm __LC_CPU_FLAGS+3,_CIF_ASCE
jo sysc_uaccess jo .Lsysc_uaccess
j sysc_return # beware of critical section cleanup j .Lsysc_return # beware of critical section cleanup
# #
# _TIF_NEED_RESCHED is set, call schedule # _TIF_NEED_RESCHED is set, call schedule
# #
sysc_reschedule: .Lsysc_reschedule:
l %r1,BASED(.Lschedule) l %r1,BASED(.Lc_schedule)
la %r14,BASED(sysc_return) la %r14,BASED(.Lsysc_return)
br %r1 # call schedule br %r1 # call schedule
# #
# _CIF_MCCK_PENDING is set, call handler # _CIF_MCCK_PENDING is set, call handler
# #
sysc_mcck_pending: .Lsysc_mcck_pending:
l %r1,BASED(.Lhandle_mcck) l %r1,BASED(.Lc_handle_mcck)
la %r14,BASED(sysc_return) la %r14,BASED(.Lsysc_return)
br %r1 # TIF bit will be cleared by handler br %r1 # TIF bit will be cleared by handler
# #
# _CIF_ASCE is set, load user space asce # _CIF_ASCE is set, load user space asce
# #
sysc_uaccess: .Lsysc_uaccess:
ni __LC_CPU_FLAGS+3,255-_CIF_ASCE ni __LC_CPU_FLAGS+3,255-_CIF_ASCE
lctl %c1,%c1,__LC_USER_ASCE # load primary asce lctl %c1,%c1,__LC_USER_ASCE # load primary asce
j sysc_return j .Lsysc_return
# #
# _TIF_SIGPENDING is set, call do_signal # _TIF_SIGPENDING is set, call do_signal
# #
sysc_sigpending: .Lsysc_sigpending:
lr %r2,%r11 # pass pointer to pt_regs lr %r2,%r11 # pass pointer to pt_regs
l %r1,BASED(.Ldo_signal) l %r1,BASED(.Lc_do_signal)
basr %r14,%r1 # call do_signal basr %r14,%r1 # call do_signal
tm __PT_FLAGS+3(%r11),_PIF_SYSCALL tm __PT_FLAGS+3(%r11),_PIF_SYSCALL
jno sysc_return jno .Lsysc_return
lm %r2,%r7,__PT_R2(%r11) # load svc arguments lm %r2,%r7,__PT_R2(%r11) # load svc arguments
l %r10,__TI_sysc_table(%r12) # 31 bit system call table l %r10,__TI_sysc_table(%r12) # 31 bit system call table
xr %r8,%r8 # svc 0 returns -ENOSYS xr %r8,%r8 # svc 0 returns -ENOSYS
clc __PT_INT_CODE+2(2,%r11),BASED(.Lnr_syscalls+2) clc __PT_INT_CODE+2(2,%r11),BASED(.Lnr_syscalls+2)
jnl sysc_nr_ok # invalid svc number -> do svc 0 jnl .Lsysc_nr_ok # invalid svc number -> do svc 0
lh %r8,__PT_INT_CODE+2(%r11) # load new svc number lh %r8,__PT_INT_CODE+2(%r11) # load new svc number
sla %r8,2 sla %r8,2
j sysc_nr_ok # restart svc j .Lsysc_nr_ok # restart svc
# #
# _TIF_NOTIFY_RESUME is set, call do_notify_resume # _TIF_NOTIFY_RESUME is set, call do_notify_resume
# #
sysc_notify_resume: .Lsysc_notify_resume:
lr %r2,%r11 # pass pointer to pt_regs lr %r2,%r11 # pass pointer to pt_regs
l %r1,BASED(.Ldo_notify_resume) l %r1,BASED(.Lc_do_notify_resume)
la %r14,BASED(sysc_return) la %r14,BASED(.Lsysc_return)
br %r1 # call do_notify_resume br %r1 # call do_notify_resume
# #
# _PIF_PER_TRAP is set, call do_per_trap # _PIF_PER_TRAP is set, call do_per_trap
# #
sysc_singlestep: .Lsysc_singlestep:
ni __PT_FLAGS+3(%r11),255-_PIF_PER_TRAP ni __PT_FLAGS+3(%r11),255-_PIF_PER_TRAP
lr %r2,%r11 # pass pointer to pt_regs lr %r2,%r11 # pass pointer to pt_regs
l %r1,BASED(.Ldo_per_trap) l %r1,BASED(.Lc_do_per_trap)
la %r14,BASED(sysc_return) la %r14,BASED(.Lsysc_return)
br %r1 # call do_per_trap br %r1 # call do_per_trap
# #
# call tracehook_report_syscall_entry/tracehook_report_syscall_exit before # call tracehook_report_syscall_entry/tracehook_report_syscall_exit before
# and after the system call # and after the system call
# #
sysc_tracesys: .Lsysc_tracesys:
l %r1,BASED(.Ltrace_enter) l %r1,BASED(.Lc_trace_enter)
lr %r2,%r11 # pass pointer to pt_regs lr %r2,%r11 # pass pointer to pt_regs
la %r3,0 la %r3,0
xr %r0,%r0 xr %r0,%r0
@ -316,22 +316,22 @@ sysc_tracesys:
st %r0,__PT_R2(%r11) st %r0,__PT_R2(%r11)
basr %r14,%r1 # call do_syscall_trace_enter basr %r14,%r1 # call do_syscall_trace_enter
cl %r2,BASED(.Lnr_syscalls) cl %r2,BASED(.Lnr_syscalls)
jnl sysc_tracenogo jnl .Lsysc_tracenogo
lr %r8,%r2 lr %r8,%r2
sll %r8,2 sll %r8,2
l %r9,0(%r8,%r10) l %r9,0(%r8,%r10)
sysc_tracego: .Lsysc_tracego:
lm %r3,%r7,__PT_R3(%r11) lm %r3,%r7,__PT_R3(%r11)
st %r7,STACK_FRAME_OVERHEAD(%r15) st %r7,STACK_FRAME_OVERHEAD(%r15)
l %r2,__PT_ORIG_GPR2(%r11) l %r2,__PT_ORIG_GPR2(%r11)
basr %r14,%r9 # call sys_xxx basr %r14,%r9 # call sys_xxx
st %r2,__PT_R2(%r11) # store return value st %r2,__PT_R2(%r11) # store return value
sysc_tracenogo: .Lsysc_tracenogo:
tm __TI_flags+3(%r12),_TIF_TRACE tm __TI_flags+3(%r12),_TIF_TRACE
jz sysc_return jz .Lsysc_return
l %r1,BASED(.Ltrace_exit) l %r1,BASED(.Lc_trace_exit)
lr %r2,%r11 # pass pointer to pt_regs lr %r2,%r11 # pass pointer to pt_regs
la %r14,BASED(sysc_return) la %r14,BASED(.Lsysc_return)
br %r1 # call do_syscall_trace_exit br %r1 # call do_syscall_trace_exit
# #
@ -341,18 +341,18 @@ ENTRY(ret_from_fork)
la %r11,STACK_FRAME_OVERHEAD(%r15) la %r11,STACK_FRAME_OVERHEAD(%r15)
l %r12,__LC_THREAD_INFO l %r12,__LC_THREAD_INFO
l %r13,__LC_SVC_NEW_PSW+4 l %r13,__LC_SVC_NEW_PSW+4
l %r1,BASED(.Lschedule_tail) l %r1,BASED(.Lc_schedule_tail)
basr %r14,%r1 # call schedule_tail basr %r14,%r1 # call schedule_tail
TRACE_IRQS_ON TRACE_IRQS_ON
ssm __LC_SVC_NEW_PSW # reenable interrupts ssm __LC_SVC_NEW_PSW # reenable interrupts
tm __PT_PSW+1(%r11),0x01 # forking a kernel thread ? tm __PT_PSW+1(%r11),0x01 # forking a kernel thread ?
jne sysc_tracenogo jne .Lsysc_tracenogo
# it's a kernel thread # it's a kernel thread
lm %r9,%r10,__PT_R9(%r11) # load gprs lm %r9,%r10,__PT_R9(%r11) # load gprs
ENTRY(kernel_thread_starter) ENTRY(kernel_thread_starter)
la %r2,0(%r10) la %r2,0(%r10)
basr %r14,%r9 basr %r14,%r9
j sysc_tracenogo j .Lsysc_tracenogo
/* /*
* Program check handler routine * Program check handler routine
@ -369,7 +369,7 @@ ENTRY(pgm_check_handler)
tmh %r8,0x4000 # PER bit set in old PSW ? tmh %r8,0x4000 # PER bit set in old PSW ?
jnz 0f # -> enabled, can't be a double fault jnz 0f # -> enabled, can't be a double fault
tm __LC_PGM_ILC+3,0x80 # check for per exception tm __LC_PGM_ILC+3,0x80 # check for per exception
jnz pgm_svcper # -> single stepped svc jnz .Lpgm_svcper # -> single stepped svc
0: CHECK_STACK STACK_SIZE,__LC_SAVE_AREA_SYNC 0: CHECK_STACK STACK_SIZE,__LC_SAVE_AREA_SYNC
ahi %r15,-(STACK_FRAME_OVERHEAD + __PT_SIZE) ahi %r15,-(STACK_FRAME_OVERHEAD + __PT_SIZE)
j 2f j 2f
@ -386,42 +386,42 @@ ENTRY(pgm_check_handler)
jz 0f jz 0f
l %r1,__TI_task(%r12) l %r1,__TI_task(%r12)
tmh %r8,0x0001 # kernel per event ? tmh %r8,0x0001 # kernel per event ?
jz pgm_kprobe jz .Lpgm_kprobe
oi __PT_FLAGS+3(%r11),_PIF_PER_TRAP oi __PT_FLAGS+3(%r11),_PIF_PER_TRAP
mvc __THREAD_per_address(4,%r1),__LC_PER_ADDRESS mvc __THREAD_per_address(4,%r1),__LC_PER_ADDRESS
mvc __THREAD_per_cause(2,%r1),__LC_PER_CODE mvc __THREAD_per_cause(2,%r1),__LC_PER_CODE
mvc __THREAD_per_paid(1,%r1),__LC_PER_ACCESS_ID mvc __THREAD_per_paid(1,%r1),__LC_PER_ACCESS_ID
0: REENABLE_IRQS 0: REENABLE_IRQS
xc __SF_BACKCHAIN(4,%r15),__SF_BACKCHAIN(%r15) xc __SF_BACKCHAIN(4,%r15),__SF_BACKCHAIN(%r15)
l %r1,BASED(.Ljump_table) l %r1,BASED(.Lc_jump_table)
la %r10,0x7f la %r10,0x7f
n %r10,__PT_INT_CODE(%r11) n %r10,__PT_INT_CODE(%r11)
je sysc_return je .Lsysc_return
sll %r10,2 sll %r10,2
l %r1,0(%r10,%r1) # load address of handler routine l %r1,0(%r10,%r1) # load address of handler routine
lr %r2,%r11 # pass pointer to pt_regs lr %r2,%r11 # pass pointer to pt_regs
basr %r14,%r1 # branch to interrupt-handler basr %r14,%r1 # branch to interrupt-handler
j sysc_return j .Lsysc_return
# #
# PER event in supervisor state, must be kprobes # PER event in supervisor state, must be kprobes
# #
pgm_kprobe: .Lpgm_kprobe:
REENABLE_IRQS REENABLE_IRQS
xc __SF_BACKCHAIN(4,%r15),__SF_BACKCHAIN(%r15) xc __SF_BACKCHAIN(4,%r15),__SF_BACKCHAIN(%r15)
l %r1,BASED(.Ldo_per_trap) l %r1,BASED(.Lc_do_per_trap)
lr %r2,%r11 # pass pointer to pt_regs lr %r2,%r11 # pass pointer to pt_regs
basr %r14,%r1 # call do_per_trap basr %r14,%r1 # call do_per_trap
j sysc_return j .Lsysc_return
# #
# single stepped system call # single stepped system call
# #
pgm_svcper: .Lpgm_svcper:
mvc __LC_RETURN_PSW(4),__LC_SVC_NEW_PSW mvc __LC_RETURN_PSW(4),__LC_SVC_NEW_PSW
mvc __LC_RETURN_PSW+4(4),BASED(.Lsysc_per) mvc __LC_RETURN_PSW+4(4),BASED(.Lc_sysc_per)
lhi %r14,_PIF_SYSCALL | _PIF_PER_TRAP lhi %r14,_PIF_SYSCALL | _PIF_PER_TRAP
lpsw __LC_RETURN_PSW # branch to sysc_per and enable irqs lpsw __LC_RETURN_PSW # branch to .Lsysc_per and enable irqs
/* /*
* IO interrupt handler routine * IO interrupt handler routine
@ -435,9 +435,9 @@ ENTRY(io_int_handler)
l %r13,__LC_SVC_NEW_PSW+4 l %r13,__LC_SVC_NEW_PSW+4
lm %r8,%r9,__LC_IO_OLD_PSW lm %r8,%r9,__LC_IO_OLD_PSW
tmh %r8,0x0001 # interrupting from user ? tmh %r8,0x0001 # interrupting from user ?
jz io_skip jz .Lio_skip
UPDATE_VTIME %r14,%r15,__LC_ASYNC_ENTER_TIMER UPDATE_VTIME %r14,%r15,__LC_ASYNC_ENTER_TIMER
io_skip: .Lio_skip:
SWITCH_ASYNC __LC_SAVE_AREA_ASYNC,__LC_ASYNC_STACK,STACK_SHIFT SWITCH_ASYNC __LC_SAVE_AREA_ASYNC,__LC_ASYNC_STACK,STACK_SHIFT
stm %r0,%r7,__PT_R0(%r11) stm %r0,%r7,__PT_R0(%r11)
mvc __PT_R8(32,%r11),__LC_SAVE_AREA_ASYNC mvc __PT_R8(32,%r11),__LC_SAVE_AREA_ASYNC
@ -446,35 +446,35 @@ io_skip:
xc __PT_FLAGS(4,%r11),__PT_FLAGS(%r11) xc __PT_FLAGS(4,%r11),__PT_FLAGS(%r11)
TRACE_IRQS_OFF TRACE_IRQS_OFF
xc __SF_BACKCHAIN(4,%r15),__SF_BACKCHAIN(%r15) xc __SF_BACKCHAIN(4,%r15),__SF_BACKCHAIN(%r15)
io_loop: .Lio_loop:
l %r1,BASED(.Ldo_IRQ) l %r1,BASED(.Lc_do_IRQ)
lr %r2,%r11 # pass pointer to pt_regs lr %r2,%r11 # pass pointer to pt_regs
lhi %r3,IO_INTERRUPT lhi %r3,IO_INTERRUPT
tm __PT_INT_CODE+8(%r11),0x80 # adapter interrupt ? tm __PT_INT_CODE+8(%r11),0x80 # adapter interrupt ?
jz io_call jz .Lio_call
lhi %r3,THIN_INTERRUPT lhi %r3,THIN_INTERRUPT
io_call: .Lio_call:
basr %r14,%r1 # call do_IRQ basr %r14,%r1 # call do_IRQ
tm __LC_MACHINE_FLAGS+2,0x10 # MACHINE_FLAG_LPAR tm __LC_MACHINE_FLAGS+2,0x10 # MACHINE_FLAG_LPAR
jz io_return jz .Lio_return
tpi 0 tpi 0
jz io_return jz .Lio_return
mvc __PT_INT_CODE(12,%r11),__LC_SUBCHANNEL_ID mvc __PT_INT_CODE(12,%r11),__LC_SUBCHANNEL_ID
j io_loop j .Lio_loop
io_return: .Lio_return:
LOCKDEP_SYS_EXIT LOCKDEP_SYS_EXIT
TRACE_IRQS_ON TRACE_IRQS_ON
io_tif: .Lio_tif:
tm __TI_flags+3(%r12),_TIF_WORK tm __TI_flags+3(%r12),_TIF_WORK
jnz io_work # there is work to do (signals etc.) jnz .Lio_work # there is work to do (signals etc.)
tm __LC_CPU_FLAGS+3,_CIF_WORK tm __LC_CPU_FLAGS+3,_CIF_WORK
jnz io_work jnz .Lio_work
io_restore: .Lio_restore:
mvc __LC_RETURN_PSW(8),__PT_PSW(%r11) mvc __LC_RETURN_PSW(8),__PT_PSW(%r11)
stpt __LC_EXIT_TIMER stpt __LC_EXIT_TIMER
lm %r0,%r15,__PT_R0(%r11) lm %r0,%r15,__PT_R0(%r11)
lpsw __LC_RETURN_PSW lpsw __LC_RETURN_PSW
io_done: .Lio_done:
# #
# There is work todo, find out in which context we have been interrupted: # There is work todo, find out in which context we have been interrupted:
@ -483,15 +483,15 @@ io_done:
# the preemption counter and if it is zero call preempt_schedule_irq # the preemption counter and if it is zero call preempt_schedule_irq
# Before any work can be done, a switch to the kernel stack is required. # Before any work can be done, a switch to the kernel stack is required.
# #
io_work: .Lio_work:
tm __PT_PSW+1(%r11),0x01 # returning to user ? tm __PT_PSW+1(%r11),0x01 # returning to user ?
jo io_work_user # yes -> do resched & signal jo .Lio_work_user # yes -> do resched & signal
#ifdef CONFIG_PREEMPT #ifdef CONFIG_PREEMPT
# check for preemptive scheduling # check for preemptive scheduling
icm %r0,15,__TI_precount(%r12) icm %r0,15,__TI_precount(%r12)
jnz io_restore # preemption disabled jnz .Lio_restore # preemption disabled
tm __TI_flags+3(%r12),_TIF_NEED_RESCHED tm __TI_flags+3(%r12),_TIF_NEED_RESCHED
jno io_restore jno .Lio_restore
# switch to kernel stack # switch to kernel stack
l %r1,__PT_R15(%r11) l %r1,__PT_R15(%r11)
ahi %r1,-(STACK_FRAME_OVERHEAD + __PT_SIZE) ahi %r1,-(STACK_FRAME_OVERHEAD + __PT_SIZE)
@ -499,20 +499,20 @@ io_work:
xc __SF_BACKCHAIN(4,%r1),__SF_BACKCHAIN(%r1) xc __SF_BACKCHAIN(4,%r1),__SF_BACKCHAIN(%r1)
la %r11,STACK_FRAME_OVERHEAD(%r1) la %r11,STACK_FRAME_OVERHEAD(%r1)
lr %r15,%r1 lr %r15,%r1
# TRACE_IRQS_ON already done at io_return, call # TRACE_IRQS_ON already done at .Lio_return, call
# TRACE_IRQS_OFF to keep things symmetrical # TRACE_IRQS_OFF to keep things symmetrical
TRACE_IRQS_OFF TRACE_IRQS_OFF
l %r1,BASED(.Lpreempt_irq) l %r1,BASED(.Lc_preempt_irq)
basr %r14,%r1 # call preempt_schedule_irq basr %r14,%r1 # call preempt_schedule_irq
j io_return j .Lio_return
#else #else
j io_restore j .Lio_restore
#endif #endif
# #
# Need to do work before returning to userspace, switch to kernel stack # Need to do work before returning to userspace, switch to kernel stack
# #
io_work_user: .Lio_work_user:
l %r1,__LC_KERNEL_STACK l %r1,__LC_KERNEL_STACK
mvc STACK_FRAME_OVERHEAD(__PT_SIZE,%r1),0(%r11) mvc STACK_FRAME_OVERHEAD(__PT_SIZE,%r1),0(%r11)
xc __SF_BACKCHAIN(4,%r1),__SF_BACKCHAIN(%r1) xc __SF_BACKCHAIN(4,%r1),__SF_BACKCHAIN(%r1)
@ -522,74 +522,74 @@ io_work_user:
# #
# One of the work bits is on. Find out which one. # One of the work bits is on. Find out which one.
# #
io_work_tif: .Lio_work_tif:
tm __LC_CPU_FLAGS+3(%r12),_CIF_MCCK_PENDING tm __LC_CPU_FLAGS+3(%r12),_CIF_MCCK_PENDING
jo io_mcck_pending jo .Lio_mcck_pending
tm __TI_flags+3(%r12),_TIF_NEED_RESCHED tm __TI_flags+3(%r12),_TIF_NEED_RESCHED
jo io_reschedule jo .Lio_reschedule
tm __TI_flags+3(%r12),_TIF_SIGPENDING tm __TI_flags+3(%r12),_TIF_SIGPENDING
jo io_sigpending jo .Lio_sigpending
tm __TI_flags+3(%r12),_TIF_NOTIFY_RESUME tm __TI_flags+3(%r12),_TIF_NOTIFY_RESUME
jo io_notify_resume jo .Lio_notify_resume
tm __LC_CPU_FLAGS+3,_CIF_ASCE tm __LC_CPU_FLAGS+3,_CIF_ASCE
jo io_uaccess jo .Lio_uaccess
j io_return # beware of critical section cleanup j .Lio_return # beware of critical section cleanup
# #
# _CIF_MCCK_PENDING is set, call handler # _CIF_MCCK_PENDING is set, call handler
# #
io_mcck_pending: .Lio_mcck_pending:
# TRACE_IRQS_ON already done at io_return # TRACE_IRQS_ON already done at .Lio_return
l %r1,BASED(.Lhandle_mcck) l %r1,BASED(.Lc_handle_mcck)
basr %r14,%r1 # TIF bit will be cleared by handler basr %r14,%r1 # TIF bit will be cleared by handler
TRACE_IRQS_OFF TRACE_IRQS_OFF
j io_return j .Lio_return
# #
# _CIF_ASCE is set, load user space asce # _CIF_ASCE is set, load user space asce
# #
io_uaccess: .Lio_uaccess:
ni __LC_CPU_FLAGS+3,255-_CIF_ASCE ni __LC_CPU_FLAGS+3,255-_CIF_ASCE
lctl %c1,%c1,__LC_USER_ASCE # load primary asce lctl %c1,%c1,__LC_USER_ASCE # load primary asce
j io_return j .Lio_return
# #
# _TIF_NEED_RESCHED is set, call schedule # _TIF_NEED_RESCHED is set, call schedule
# #
io_reschedule: .Lio_reschedule:
# TRACE_IRQS_ON already done at io_return # TRACE_IRQS_ON already done at .Lio_return
l %r1,BASED(.Lschedule) l %r1,BASED(.Lc_schedule)
ssm __LC_SVC_NEW_PSW # reenable interrupts ssm __LC_SVC_NEW_PSW # reenable interrupts
basr %r14,%r1 # call scheduler basr %r14,%r1 # call scheduler
ssm __LC_PGM_NEW_PSW # disable I/O and ext. interrupts ssm __LC_PGM_NEW_PSW # disable I/O and ext. interrupts
TRACE_IRQS_OFF TRACE_IRQS_OFF
j io_return j .Lio_return
# #
# _TIF_SIGPENDING is set, call do_signal # _TIF_SIGPENDING is set, call do_signal
# #
io_sigpending: .Lio_sigpending:
# TRACE_IRQS_ON already done at io_return # TRACE_IRQS_ON already done at .Lio_return
l %r1,BASED(.Ldo_signal) l %r1,BASED(.Lc_do_signal)
ssm __LC_SVC_NEW_PSW # reenable interrupts ssm __LC_SVC_NEW_PSW # reenable interrupts
lr %r2,%r11 # pass pointer to pt_regs lr %r2,%r11 # pass pointer to pt_regs
basr %r14,%r1 # call do_signal basr %r14,%r1 # call do_signal
ssm __LC_PGM_NEW_PSW # disable I/O and ext. interrupts ssm __LC_PGM_NEW_PSW # disable I/O and ext. interrupts
TRACE_IRQS_OFF TRACE_IRQS_OFF
j io_return j .Lio_return
# #
# _TIF_SIGPENDING is set, call do_signal # _TIF_SIGPENDING is set, call do_signal
# #
io_notify_resume: .Lio_notify_resume:
# TRACE_IRQS_ON already done at io_return # TRACE_IRQS_ON already done at .Lio_return
l %r1,BASED(.Ldo_notify_resume) l %r1,BASED(.Lc_do_notify_resume)
ssm __LC_SVC_NEW_PSW # reenable interrupts ssm __LC_SVC_NEW_PSW # reenable interrupts
lr %r2,%r11 # pass pointer to pt_regs lr %r2,%r11 # pass pointer to pt_regs
basr %r14,%r1 # call do_notify_resume basr %r14,%r1 # call do_notify_resume
ssm __LC_PGM_NEW_PSW # disable I/O and ext. interrupts ssm __LC_PGM_NEW_PSW # disable I/O and ext. interrupts
TRACE_IRQS_OFF TRACE_IRQS_OFF
j io_return j .Lio_return
/* /*
* External interrupt handler routine * External interrupt handler routine
@ -603,9 +603,9 @@ ENTRY(ext_int_handler)
l %r13,__LC_SVC_NEW_PSW+4 l %r13,__LC_SVC_NEW_PSW+4
lm %r8,%r9,__LC_EXT_OLD_PSW lm %r8,%r9,__LC_EXT_OLD_PSW
tmh %r8,0x0001 # interrupting from user ? tmh %r8,0x0001 # interrupting from user ?
jz ext_skip jz .Lext_skip
UPDATE_VTIME %r14,%r15,__LC_ASYNC_ENTER_TIMER UPDATE_VTIME %r14,%r15,__LC_ASYNC_ENTER_TIMER
ext_skip: .Lext_skip:
SWITCH_ASYNC __LC_SAVE_AREA_ASYNC,__LC_ASYNC_STACK,STACK_SHIFT SWITCH_ASYNC __LC_SAVE_AREA_ASYNC,__LC_ASYNC_STACK,STACK_SHIFT
stm %r0,%r7,__PT_R0(%r11) stm %r0,%r7,__PT_R0(%r11)
mvc __PT_R8(32,%r11),__LC_SAVE_AREA_ASYNC mvc __PT_R8(32,%r11),__LC_SAVE_AREA_ASYNC
@ -614,29 +614,29 @@ ext_skip:
mvc __PT_INT_PARM(4,%r11),__LC_EXT_PARAMS mvc __PT_INT_PARM(4,%r11),__LC_EXT_PARAMS
xc __PT_FLAGS(4,%r11),__PT_FLAGS(%r11) xc __PT_FLAGS(4,%r11),__PT_FLAGS(%r11)
TRACE_IRQS_OFF TRACE_IRQS_OFF
l %r1,BASED(.Ldo_IRQ) l %r1,BASED(.Lc_do_IRQ)
lr %r2,%r11 # pass pointer to pt_regs lr %r2,%r11 # pass pointer to pt_regs
lhi %r3,EXT_INTERRUPT lhi %r3,EXT_INTERRUPT
basr %r14,%r1 # call do_IRQ basr %r14,%r1 # call do_IRQ
j io_return j .Lio_return
/* /*
* Load idle PSW. The second "half" of this function is in cleanup_idle. * Load idle PSW. The second "half" of this function is in .Lcleanup_idle.
*/ */
ENTRY(psw_idle) ENTRY(psw_idle)
st %r3,__SF_EMPTY(%r15) st %r3,__SF_EMPTY(%r15)
basr %r1,0 basr %r1,0
la %r1,psw_idle_lpsw+4-.(%r1) la %r1,.Lpsw_idle_lpsw+4-.(%r1)
st %r1,__SF_EMPTY+4(%r15) st %r1,__SF_EMPTY+4(%r15)
oi __SF_EMPTY+4(%r15),0x80 oi __SF_EMPTY+4(%r15),0x80
stck __CLOCK_IDLE_ENTER(%r2) stck __CLOCK_IDLE_ENTER(%r2)
stpt __TIMER_IDLE_ENTER(%r2) stpt __TIMER_IDLE_ENTER(%r2)
psw_idle_lpsw: .Lpsw_idle_lpsw:
lpsw __SF_EMPTY(%r15) lpsw __SF_EMPTY(%r15)
br %r14 br %r14
psw_idle_end: .Lpsw_idle_end:
__critical_end: .L__critical_end:
/* /*
* Machine check handler routines * Machine check handler routines
@ -650,7 +650,7 @@ ENTRY(mcck_int_handler)
l %r13,__LC_SVC_NEW_PSW+4 l %r13,__LC_SVC_NEW_PSW+4
lm %r8,%r9,__LC_MCK_OLD_PSW lm %r8,%r9,__LC_MCK_OLD_PSW
tm __LC_MCCK_CODE,0x80 # system damage? tm __LC_MCCK_CODE,0x80 # system damage?
jo mcck_panic # yes -> rest of mcck code invalid jo .Lmcck_panic # yes -> rest of mcck code invalid
la %r14,__LC_CPU_TIMER_SAVE_AREA la %r14,__LC_CPU_TIMER_SAVE_AREA
mvc __LC_MCCK_ENTER_TIMER(8),0(%r14) mvc __LC_MCCK_ENTER_TIMER(8),0(%r14)
tm __LC_MCCK_CODE+5,0x02 # stored cpu timer value valid? tm __LC_MCCK_CODE+5,0x02 # stored cpu timer value valid?
@ -668,22 +668,22 @@ ENTRY(mcck_int_handler)
2: spt 0(%r14) 2: spt 0(%r14)
mvc __LC_MCCK_ENTER_TIMER(8),0(%r14) mvc __LC_MCCK_ENTER_TIMER(8),0(%r14)
3: tm __LC_MCCK_CODE+2,0x09 # mwp + ia of old psw valid? 3: tm __LC_MCCK_CODE+2,0x09 # mwp + ia of old psw valid?
jno mcck_panic # no -> skip cleanup critical jno .Lmcck_panic # no -> skip cleanup critical
tm %r8,0x0001 # interrupting from user ? tm %r8,0x0001 # interrupting from user ?
jz mcck_skip jz .Lmcck_skip
UPDATE_VTIME %r14,%r15,__LC_MCCK_ENTER_TIMER UPDATE_VTIME %r14,%r15,__LC_MCCK_ENTER_TIMER
mcck_skip: .Lmcck_skip:
SWITCH_ASYNC __LC_GPREGS_SAVE_AREA+32,__LC_PANIC_STACK,PAGE_SHIFT SWITCH_ASYNC __LC_GPREGS_SAVE_AREA+32,__LC_PANIC_STACK,PAGE_SHIFT
stm %r0,%r7,__PT_R0(%r11) stm %r0,%r7,__PT_R0(%r11)
mvc __PT_R8(32,%r11),__LC_GPREGS_SAVE_AREA+32 mvc __PT_R8(32,%r11),__LC_GPREGS_SAVE_AREA+32
stm %r8,%r9,__PT_PSW(%r11) stm %r8,%r9,__PT_PSW(%r11)
xc __PT_FLAGS(4,%r11),__PT_FLAGS(%r11) xc __PT_FLAGS(4,%r11),__PT_FLAGS(%r11)
xc __SF_BACKCHAIN(4,%r15),__SF_BACKCHAIN(%r15) xc __SF_BACKCHAIN(4,%r15),__SF_BACKCHAIN(%r15)
l %r1,BASED(.Ldo_machine_check) l %r1,BASED(.Lc_do_machine_check)
lr %r2,%r11 # pass pointer to pt_regs lr %r2,%r11 # pass pointer to pt_regs
basr %r14,%r1 # call s390_do_machine_check basr %r14,%r1 # call s390_do_machine_check
tm __PT_PSW+1(%r11),0x01 # returning to user ? tm __PT_PSW+1(%r11),0x01 # returning to user ?
jno mcck_return jno .Lmcck_return
l %r1,__LC_KERNEL_STACK # switch to kernel stack l %r1,__LC_KERNEL_STACK # switch to kernel stack
mvc STACK_FRAME_OVERHEAD(__PT_SIZE,%r1),0(%r11) mvc STACK_FRAME_OVERHEAD(__PT_SIZE,%r1),0(%r11)
xc __SF_BACKCHAIN(4,%r1),__SF_BACKCHAIN(%r1) xc __SF_BACKCHAIN(4,%r1),__SF_BACKCHAIN(%r1)
@ -691,12 +691,12 @@ mcck_skip:
lr %r15,%r1 lr %r15,%r1
ssm __LC_PGM_NEW_PSW # turn dat on, keep irqs off ssm __LC_PGM_NEW_PSW # turn dat on, keep irqs off
tm __LC_CPU_FLAGS+3,_CIF_MCCK_PENDING tm __LC_CPU_FLAGS+3,_CIF_MCCK_PENDING
jno mcck_return jno .Lmcck_return
TRACE_IRQS_OFF TRACE_IRQS_OFF
l %r1,BASED(.Lhandle_mcck) l %r1,BASED(.Lc_handle_mcck)
basr %r14,%r1 # call s390_handle_mcck basr %r14,%r1 # call s390_handle_mcck
TRACE_IRQS_ON TRACE_IRQS_ON
mcck_return: .Lmcck_return:
mvc __LC_RETURN_MCCK_PSW(8),__PT_PSW(%r11) # move return PSW mvc __LC_RETURN_MCCK_PSW(8),__PT_PSW(%r11) # move return PSW
tm __LC_RETURN_MCCK_PSW+1,0x01 # returning to user ? tm __LC_RETURN_MCCK_PSW+1,0x01 # returning to user ?
jno 0f jno 0f
@ -706,15 +706,15 @@ mcck_return:
0: lm %r0,%r15,__PT_R0(%r11) 0: lm %r0,%r15,__PT_R0(%r11)
lpsw __LC_RETURN_MCCK_PSW lpsw __LC_RETURN_MCCK_PSW
mcck_panic: .Lmcck_panic:
l %r14,__LC_PANIC_STACK l %r14,__LC_PANIC_STACK
slr %r14,%r15 slr %r14,%r15
sra %r14,PAGE_SHIFT sra %r14,PAGE_SHIFT
jz 0f jz 0f
l %r15,__LC_PANIC_STACK l %r15,__LC_PANIC_STACK
j mcck_skip j .Lmcck_skip
0: ahi %r15,-(STACK_FRAME_OVERHEAD + __PT_SIZE) 0: ahi %r15,-(STACK_FRAME_OVERHEAD + __PT_SIZE)
j mcck_skip j .Lmcck_skip
# #
# PSW restart interrupt handler # PSW restart interrupt handler
@ -764,58 +764,58 @@ stack_overflow:
1: .long kernel_stack_overflow 1: .long kernel_stack_overflow
#endif #endif
cleanup_table: .Lcleanup_table:
.long system_call + 0x80000000 .long system_call + 0x80000000
.long sysc_do_svc + 0x80000000 .long .Lsysc_do_svc + 0x80000000
.long sysc_tif + 0x80000000 .long .Lsysc_tif + 0x80000000
.long sysc_restore + 0x80000000 .long .Lsysc_restore + 0x80000000
.long sysc_done + 0x80000000 .long .Lsysc_done + 0x80000000
.long io_tif + 0x80000000 .long .Lio_tif + 0x80000000
.long io_restore + 0x80000000 .long .Lio_restore + 0x80000000
.long io_done + 0x80000000 .long .Lio_done + 0x80000000
.long psw_idle + 0x80000000 .long psw_idle + 0x80000000
.long psw_idle_end + 0x80000000 .long .Lpsw_idle_end + 0x80000000
cleanup_critical: cleanup_critical:
cl %r9,BASED(cleanup_table) # system_call cl %r9,BASED(.Lcleanup_table) # system_call
jl 0f jl 0f
cl %r9,BASED(cleanup_table+4) # sysc_do_svc cl %r9,BASED(.Lcleanup_table+4) # .Lsysc_do_svc
jl cleanup_system_call jl .Lcleanup_system_call
cl %r9,BASED(cleanup_table+8) # sysc_tif cl %r9,BASED(.Lcleanup_table+8) # .Lsysc_tif
jl 0f jl 0f
cl %r9,BASED(cleanup_table+12) # sysc_restore cl %r9,BASED(.Lcleanup_table+12) # .Lsysc_restore
jl cleanup_sysc_tif jl .Lcleanup_sysc_tif
cl %r9,BASED(cleanup_table+16) # sysc_done cl %r9,BASED(.Lcleanup_table+16) # .Lsysc_done
jl cleanup_sysc_restore jl .Lcleanup_sysc_restore
cl %r9,BASED(cleanup_table+20) # io_tif cl %r9,BASED(.Lcleanup_table+20) # .Lio_tif
jl 0f jl 0f
cl %r9,BASED(cleanup_table+24) # io_restore cl %r9,BASED(.Lcleanup_table+24) # .Lio_restore
jl cleanup_io_tif jl .Lcleanup_io_tif
cl %r9,BASED(cleanup_table+28) # io_done cl %r9,BASED(.Lcleanup_table+28) # .Lio_done
jl cleanup_io_restore jl .Lcleanup_io_restore
cl %r9,BASED(cleanup_table+32) # psw_idle cl %r9,BASED(.Lcleanup_table+32) # psw_idle
jl 0f jl 0f
cl %r9,BASED(cleanup_table+36) # psw_idle_end cl %r9,BASED(.Lcleanup_table+36) # .Lpsw_idle_end
jl cleanup_idle jl .Lcleanup_idle
0: br %r14 0: br %r14
cleanup_system_call: .Lcleanup_system_call:
# check if stpt has been executed # check if stpt has been executed
cl %r9,BASED(cleanup_system_call_insn) cl %r9,BASED(.Lcleanup_system_call_insn)
jh 0f jh 0f
mvc __LC_SYNC_ENTER_TIMER(8),__LC_ASYNC_ENTER_TIMER mvc __LC_SYNC_ENTER_TIMER(8),__LC_ASYNC_ENTER_TIMER
chi %r11,__LC_SAVE_AREA_ASYNC chi %r11,__LC_SAVE_AREA_ASYNC
je 0f je 0f
mvc __LC_SYNC_ENTER_TIMER(8),__LC_MCCK_ENTER_TIMER mvc __LC_SYNC_ENTER_TIMER(8),__LC_MCCK_ENTER_TIMER
0: # check if stm has been executed 0: # check if stm has been executed
cl %r9,BASED(cleanup_system_call_insn+4) cl %r9,BASED(.Lcleanup_system_call_insn+4)
jh 0f jh 0f
mvc __LC_SAVE_AREA_SYNC(32),0(%r11) mvc __LC_SAVE_AREA_SYNC(32),0(%r11)
0: # set up saved registers r12, and r13 0: # set up saved registers r12, and r13
st %r12,16(%r11) # r12 thread-info pointer st %r12,16(%r11) # r12 thread-info pointer
st %r13,20(%r11) # r13 literal-pool pointer st %r13,20(%r11) # r13 literal-pool pointer
# check if the user time calculation has been done # check if the user time calculation has been done
cl %r9,BASED(cleanup_system_call_insn+8) cl %r9,BASED(.Lcleanup_system_call_insn+8)
jh 0f jh 0f
l %r10,__LC_EXIT_TIMER l %r10,__LC_EXIT_TIMER
l %r15,__LC_EXIT_TIMER+4 l %r15,__LC_EXIT_TIMER+4
@ -824,7 +824,7 @@ cleanup_system_call:
st %r10,__LC_USER_TIMER st %r10,__LC_USER_TIMER
st %r15,__LC_USER_TIMER+4 st %r15,__LC_USER_TIMER+4
0: # check if the system time calculation has been done 0: # check if the system time calculation has been done
cl %r9,BASED(cleanup_system_call_insn+12) cl %r9,BASED(.Lcleanup_system_call_insn+12)
jh 0f jh 0f
l %r10,__LC_LAST_UPDATE_TIMER l %r10,__LC_LAST_UPDATE_TIMER
l %r15,__LC_LAST_UPDATE_TIMER+4 l %r15,__LC_LAST_UPDATE_TIMER+4
@ -848,20 +848,20 @@ cleanup_system_call:
# setup saved register 15 # setup saved register 15
st %r15,28(%r11) # r15 stack pointer st %r15,28(%r11) # r15 stack pointer
# set new psw address and exit # set new psw address and exit
l %r9,BASED(cleanup_table+4) # sysc_do_svc + 0x80000000 l %r9,BASED(.Lcleanup_table+4) # .Lsysc_do_svc + 0x80000000
br %r14 br %r14
cleanup_system_call_insn: .Lcleanup_system_call_insn:
.long system_call + 0x80000000 .long system_call + 0x80000000
.long sysc_stm + 0x80000000 .long .Lsysc_stm + 0x80000000
.long sysc_vtime + 0x80000000 + 36 .long .Lsysc_vtime + 0x80000000 + 36
.long sysc_vtime + 0x80000000 + 76 .long .Lsysc_vtime + 0x80000000 + 76
cleanup_sysc_tif: .Lcleanup_sysc_tif:
l %r9,BASED(cleanup_table+8) # sysc_tif + 0x80000000 l %r9,BASED(.Lcleanup_table+8) # .Lsysc_tif + 0x80000000
br %r14 br %r14
cleanup_sysc_restore: .Lcleanup_sysc_restore:
cl %r9,BASED(cleanup_sysc_restore_insn) cl %r9,BASED(.Lcleanup_sysc_restore_insn)
jhe 0f jhe 0f
l %r9,12(%r11) # get saved pointer to pt_regs l %r9,12(%r11) # get saved pointer to pt_regs
mvc __LC_RETURN_PSW(8),__PT_PSW(%r9) mvc __LC_RETURN_PSW(8),__PT_PSW(%r9)
@ -869,15 +869,15 @@ cleanup_sysc_restore:
lm %r0,%r7,__PT_R0(%r9) lm %r0,%r7,__PT_R0(%r9)
0: lm %r8,%r9,__LC_RETURN_PSW 0: lm %r8,%r9,__LC_RETURN_PSW
br %r14 br %r14
cleanup_sysc_restore_insn: .Lcleanup_sysc_restore_insn:
.long sysc_done - 4 + 0x80000000 .long .Lsysc_done - 4 + 0x80000000
cleanup_io_tif: .Lcleanup_io_tif:
l %r9,BASED(cleanup_table+20) # io_tif + 0x80000000 l %r9,BASED(.Lcleanup_table+20) # .Lio_tif + 0x80000000
br %r14 br %r14
cleanup_io_restore: .Lcleanup_io_restore:
cl %r9,BASED(cleanup_io_restore_insn) cl %r9,BASED(.Lcleanup_io_restore_insn)
jhe 0f jhe 0f
l %r9,12(%r11) # get saved r11 pointer to pt_regs l %r9,12(%r11) # get saved r11 pointer to pt_regs
mvc __LC_RETURN_PSW(8),__PT_PSW(%r9) mvc __LC_RETURN_PSW(8),__PT_PSW(%r9)
@ -885,10 +885,10 @@ cleanup_io_restore:
lm %r0,%r7,__PT_R0(%r9) lm %r0,%r7,__PT_R0(%r9)
0: lm %r8,%r9,__LC_RETURN_PSW 0: lm %r8,%r9,__LC_RETURN_PSW
br %r14 br %r14
cleanup_io_restore_insn: .Lcleanup_io_restore_insn:
.long io_done - 4 + 0x80000000 .long .Lio_done - 4 + 0x80000000
cleanup_idle: .Lcleanup_idle:
# copy interrupt clock & cpu timer # copy interrupt clock & cpu timer
mvc __CLOCK_IDLE_EXIT(8,%r2),__LC_INT_CLOCK mvc __CLOCK_IDLE_EXIT(8,%r2),__LC_INT_CLOCK
mvc __TIMER_IDLE_EXIT(8,%r2),__LC_ASYNC_ENTER_TIMER mvc __TIMER_IDLE_EXIT(8,%r2),__LC_ASYNC_ENTER_TIMER
@ -897,7 +897,7 @@ cleanup_idle:
mvc __CLOCK_IDLE_EXIT(8,%r2),__LC_MCCK_CLOCK mvc __CLOCK_IDLE_EXIT(8,%r2),__LC_MCCK_CLOCK
mvc __TIMER_IDLE_EXIT(8,%r2),__LC_MCCK_ENTER_TIMER mvc __TIMER_IDLE_EXIT(8,%r2),__LC_MCCK_ENTER_TIMER
0: # check if stck has been executed 0: # check if stck has been executed
cl %r9,BASED(cleanup_idle_insn) cl %r9,BASED(.Lcleanup_idle_insn)
jhe 1f jhe 1f
mvc __CLOCK_IDLE_ENTER(8,%r2),__CLOCK_IDLE_EXIT(%r2) mvc __CLOCK_IDLE_ENTER(8,%r2),__CLOCK_IDLE_EXIT(%r2)
mvc __TIMER_IDLE_ENTER(8,%r2),__TIMER_IDLE_EXIT(%r3) mvc __TIMER_IDLE_ENTER(8,%r2),__TIMER_IDLE_EXIT(%r3)
@ -913,12 +913,12 @@ cleanup_idle:
stm %r9,%r10,__LC_SYSTEM_TIMER stm %r9,%r10,__LC_SYSTEM_TIMER
mvc __LC_LAST_UPDATE_TIMER(8),__TIMER_IDLE_EXIT(%r2) mvc __LC_LAST_UPDATE_TIMER(8),__TIMER_IDLE_EXIT(%r2)
# prepare return psw # prepare return psw
n %r8,BASED(cleanup_idle_wait) # clear irq & wait state bits n %r8,BASED(.Lcleanup_idle_wait) # clear irq & wait state bits
l %r9,24(%r11) # return from psw_idle l %r9,24(%r11) # return from psw_idle
br %r14 br %r14
cleanup_idle_insn: .Lcleanup_idle_insn:
.long psw_idle_lpsw + 0x80000000 .long .Lpsw_idle_lpsw + 0x80000000
cleanup_idle_wait: .Lcleanup_idle_wait:
.long 0xfcfdffff .long 0xfcfdffff
/* /*
@ -933,30 +933,30 @@ cleanup_idle_wait:
/* /*
* Symbol constants * Symbol constants
*/ */
.Ldo_machine_check: .long s390_do_machine_check .Lc_do_machine_check: .long s390_do_machine_check
.Lhandle_mcck: .long s390_handle_mcck .Lc_handle_mcck: .long s390_handle_mcck
.Ldo_IRQ: .long do_IRQ .Lc_do_IRQ: .long do_IRQ
.Ldo_signal: .long do_signal .Lc_do_signal: .long do_signal
.Ldo_notify_resume: .long do_notify_resume .Lc_do_notify_resume: .long do_notify_resume
.Ldo_per_trap: .long do_per_trap .Lc_do_per_trap: .long do_per_trap
.Ljump_table: .long pgm_check_table .Lc_jump_table: .long pgm_check_table
.Lschedule: .long schedule .Lc_schedule: .long schedule
#ifdef CONFIG_PREEMPT #ifdef CONFIG_PREEMPT
.Lpreempt_irq: .long preempt_schedule_irq .Lc_preempt_irq: .long preempt_schedule_irq
#endif #endif
.Ltrace_enter: .long do_syscall_trace_enter .Lc_trace_enter: .long do_syscall_trace_enter
.Ltrace_exit: .long do_syscall_trace_exit .Lc_trace_exit: .long do_syscall_trace_exit
.Lschedule_tail: .long schedule_tail .Lc_schedule_tail: .long schedule_tail
.Lsysc_per: .long sysc_per + 0x80000000 .Lc_sysc_per: .long .Lsysc_per + 0x80000000
#ifdef CONFIG_TRACE_IRQFLAGS #ifdef CONFIG_TRACE_IRQFLAGS
.Lhardirqs_on: .long trace_hardirqs_on_caller .Lc_hardirqs_on: .long trace_hardirqs_on_caller
.Lhardirqs_off: .long trace_hardirqs_off_caller .Lc_hardirqs_off: .long trace_hardirqs_off_caller
#endif #endif
#ifdef CONFIG_LOCKDEP #ifdef CONFIG_LOCKDEP
.Llockdep_sys_exit: .long lockdep_sys_exit .Lc_lockdep_sys_exit: .long lockdep_sys_exit
#endif #endif
.Lcritical_start: .long __critical_start + 0x80000000 .Lc_critical_start: .long .L__critical_start + 0x80000000
.Lcritical_length: .long __critical_end - __critical_start .Lc_critical_length: .long .L__critical_end - .L__critical_start
.section .rodata, "a" .section .rodata, "a"
#define SYSCALL(esa,esame,emu) .long esa #define SYSCALL(esa,esame,emu) .long esa

372
arch/s390/kernel/entry64.S
View File

@ -91,7 +91,7 @@ _PIF_WORK = (_PIF_PER_TRAP)
.if \reason==1 .if \reason==1
# Some program interrupts are suppressing (e.g. protection). # Some program interrupts are suppressing (e.g. protection).
# We must also check the instruction after SIE in that case. # We must also check the instruction after SIE in that case.
# do_protection_exception will rewind to rewind_pad # do_protection_exception will rewind to .Lrewind_pad
jh .+42 jh .+42
.else .else
jhe .+42 jhe .+42
@ -192,7 +192,7 @@ ENTRY(__switch_to)
lmg %r6,%r15,__SF_GPRS(%r15) # load gprs of next task lmg %r6,%r15,__SF_GPRS(%r15) # load gprs of next task
br %r14 br %r14
__critical_start: .L__critical_start:
/* /*
* SVC interrupt handler routine. System calls are synchronous events and * SVC interrupt handler routine. System calls are synchronous events and
* are executed with interrupts enabled. * are executed with interrupts enabled.
@ -200,15 +200,15 @@ __critical_start:
ENTRY(system_call) ENTRY(system_call)
stpt __LC_SYNC_ENTER_TIMER stpt __LC_SYNC_ENTER_TIMER
sysc_stmg: .Lsysc_stmg:
stmg %r8,%r15,__LC_SAVE_AREA_SYNC stmg %r8,%r15,__LC_SAVE_AREA_SYNC
lg %r10,__LC_LAST_BREAK lg %r10,__LC_LAST_BREAK
lg %r12,__LC_THREAD_INFO lg %r12,__LC_THREAD_INFO
lghi %r14,_PIF_SYSCALL lghi %r14,_PIF_SYSCALL
sysc_per: .Lsysc_per:
lg %r15,__LC_KERNEL_STACK lg %r15,__LC_KERNEL_STACK
la %r11,STACK_FRAME_OVERHEAD(%r15) # pointer to pt_regs la %r11,STACK_FRAME_OVERHEAD(%r15) # pointer to pt_regs
sysc_vtime: .Lsysc_vtime:
UPDATE_VTIME %r13,__LC_SYNC_ENTER_TIMER UPDATE_VTIME %r13,__LC_SYNC_ENTER_TIMER
LAST_BREAK %r13 LAST_BREAK %r13
stmg %r0,%r7,__PT_R0(%r11) stmg %r0,%r7,__PT_R0(%r11)
@ -216,39 +216,39 @@ sysc_vtime:
mvc __PT_PSW(16,%r11),__LC_SVC_OLD_PSW mvc __PT_PSW(16,%r11),__LC_SVC_OLD_PSW
mvc __PT_INT_CODE(4,%r11),__LC_SVC_ILC mvc __PT_INT_CODE(4,%r11),__LC_SVC_ILC
stg %r14,__PT_FLAGS(%r11) stg %r14,__PT_FLAGS(%r11)
sysc_do_svc: .Lsysc_do_svc:
lg %r10,__TI_sysc_table(%r12) # address of system call table lg %r10,__TI_sysc_table(%r12) # address of system call table
llgh %r8,__PT_INT_CODE+2(%r11) llgh %r8,__PT_INT_CODE+2(%r11)
slag %r8,%r8,2 # shift and test for svc 0 slag %r8,%r8,2 # shift and test for svc 0
jnz sysc_nr_ok jnz .Lsysc_nr_ok
# svc 0: system call number in %r1 # svc 0: system call number in %r1
llgfr %r1,%r1 # clear high word in r1 llgfr %r1,%r1 # clear high word in r1
cghi %r1,NR_syscalls cghi %r1,NR_syscalls
jnl sysc_nr_ok jnl .Lsysc_nr_ok
sth %r1,__PT_INT_CODE+2(%r11) sth %r1,__PT_INT_CODE+2(%r11)
slag %r8,%r1,2 slag %r8,%r1,2
sysc_nr_ok: .Lsysc_nr_ok:
xc __SF_BACKCHAIN(8,%r15),__SF_BACKCHAIN(%r15) xc __SF_BACKCHAIN(8,%r15),__SF_BACKCHAIN(%r15)
stg %r2,__PT_ORIG_GPR2(%r11) stg %r2,__PT_ORIG_GPR2(%r11)
stg %r7,STACK_FRAME_OVERHEAD(%r15) stg %r7,STACK_FRAME_OVERHEAD(%r15)
lgf %r9,0(%r8,%r10) # get system call add. lgf %r9,0(%r8,%r10) # get system call add.
tm __TI_flags+7(%r12),_TIF_TRACE tm __TI_flags+7(%r12),_TIF_TRACE
jnz sysc_tracesys jnz .Lsysc_tracesys
basr %r14,%r9 # call sys_xxxx basr %r14,%r9 # call sys_xxxx
stg %r2,__PT_R2(%r11) # store return value stg %r2,__PT_R2(%r11) # store return value
sysc_return: .Lsysc_return:
LOCKDEP_SYS_EXIT LOCKDEP_SYS_EXIT
sysc_tif: .Lsysc_tif:
tm __PT_PSW+1(%r11),0x01 # returning to user ? tm __PT_PSW+1(%r11),0x01 # returning to user ?
jno sysc_restore jno .Lsysc_restore
tm __PT_FLAGS+7(%r11),_PIF_WORK tm __PT_FLAGS+7(%r11),_PIF_WORK
jnz sysc_work jnz .Lsysc_work
tm __TI_flags+7(%r12),_TIF_WORK tm __TI_flags+7(%r12),_TIF_WORK
jnz sysc_work # check for work jnz .Lsysc_work # check for work
tm __LC_CPU_FLAGS+7,_CIF_WORK tm __LC_CPU_FLAGS+7,_CIF_WORK
jnz sysc_work jnz .Lsysc_work
sysc_restore: .Lsysc_restore:
lg %r14,__LC_VDSO_PER_CPU lg %r14,__LC_VDSO_PER_CPU
lmg %r0,%r10,__PT_R0(%r11) lmg %r0,%r10,__PT_R0(%r11)
mvc __LC_RETURN_PSW(16),__PT_PSW(%r11) mvc __LC_RETURN_PSW(16),__PT_PSW(%r11)
@ -256,101 +256,101 @@ sysc_restore:
mvc __VDSO_ECTG_BASE(16,%r14),__LC_EXIT_TIMER mvc __VDSO_ECTG_BASE(16,%r14),__LC_EXIT_TIMER
lmg %r11,%r15,__PT_R11(%r11) lmg %r11,%r15,__PT_R11(%r11)
lpswe __LC_RETURN_PSW lpswe __LC_RETURN_PSW
sysc_done: .Lsysc_done:
# #
# One of the work bits is on. Find out which one. # One of the work bits is on. Find out which one.
# #
sysc_work: .Lsysc_work:
tm __LC_CPU_FLAGS+7,_CIF_MCCK_PENDING tm __LC_CPU_FLAGS+7,_CIF_MCCK_PENDING
jo sysc_mcck_pending jo .Lsysc_mcck_pending
tm __TI_flags+7(%r12),_TIF_NEED_RESCHED tm __TI_flags+7(%r12),_TIF_NEED_RESCHED
jo sysc_reschedule jo .Lsysc_reschedule
#ifdef CONFIG_UPROBES #ifdef CONFIG_UPROBES
tm __TI_flags+7(%r12),_TIF_UPROBE tm __TI_flags+7(%r12),_TIF_UPROBE
jo sysc_uprobe_notify jo .Lsysc_uprobe_notify
#endif #endif
tm __PT_FLAGS+7(%r11),_PIF_PER_TRAP tm __PT_FLAGS+7(%r11),_PIF_PER_TRAP
jo sysc_singlestep jo .Lsysc_singlestep
tm __TI_flags+7(%r12),_TIF_SIGPENDING tm __TI_flags+7(%r12),_TIF_SIGPENDING
jo sysc_sigpending jo .Lsysc_sigpending
tm __TI_flags+7(%r12),_TIF_NOTIFY_RESUME tm __TI_flags+7(%r12),_TIF_NOTIFY_RESUME
jo sysc_notify_resume jo .Lsysc_notify_resume
tm __LC_CPU_FLAGS+7,_CIF_ASCE tm __LC_CPU_FLAGS+7,_CIF_ASCE
jo sysc_uaccess jo .Lsysc_uaccess
j sysc_return # beware of critical section cleanup j .Lsysc_return # beware of critical section cleanup
# #
# _TIF_NEED_RESCHED is set, call schedule # _TIF_NEED_RESCHED is set, call schedule
# #
sysc_reschedule: .Lsysc_reschedule:
larl %r14,sysc_return larl %r14,.Lsysc_return
jg schedule jg schedule
# #
# _CIF_MCCK_PENDING is set, call handler # _CIF_MCCK_PENDING is set, call handler
# #
sysc_mcck_pending: .Lsysc_mcck_pending:
larl %r14,sysc_return larl %r14,.Lsysc_return
jg s390_handle_mcck # TIF bit will be cleared by handler jg s390_handle_mcck # TIF bit will be cleared by handler
# #
# _CIF_ASCE is set, load user space asce # _CIF_ASCE is set, load user space asce
# #
sysc_uaccess: .Lsysc_uaccess:
ni __LC_CPU_FLAGS+7,255-_CIF_ASCE ni __LC_CPU_FLAGS+7,255-_CIF_ASCE
lctlg %c1,%c1,__LC_USER_ASCE # load primary asce lctlg %c1,%c1,__LC_USER_ASCE # load primary asce
j sysc_return j .Lsysc_return
# #
# _TIF_SIGPENDING is set, call do_signal # _TIF_SIGPENDING is set, call do_signal
# #
sysc_sigpending: .Lsysc_sigpending:
lgr %r2,%r11 # pass pointer to pt_regs lgr %r2,%r11 # pass pointer to pt_regs
brasl %r14,do_signal brasl %r14,do_signal
tm __PT_FLAGS+7(%r11),_PIF_SYSCALL tm __PT_FLAGS+7(%r11),_PIF_SYSCALL
jno sysc_return jno .Lsysc_return
lmg %r2,%r7,__PT_R2(%r11) # load svc arguments lmg %r2,%r7,__PT_R2(%r11) # load svc arguments
lg %r10,__TI_sysc_table(%r12) # address of system call table lg %r10,__TI_sysc_table(%r12) # address of system call table
lghi %r8,0 # svc 0 returns -ENOSYS lghi %r8,0 # svc 0 returns -ENOSYS
llgh %r1,__PT_INT_CODE+2(%r11) # load new svc number llgh %r1,__PT_INT_CODE+2(%r11) # load new svc number
cghi %r1,NR_syscalls cghi %r1,NR_syscalls
jnl sysc_nr_ok # invalid svc number -> do svc 0 jnl .Lsysc_nr_ok # invalid svc number -> do svc 0
slag %r8,%r1,2 slag %r8,%r1,2
j sysc_nr_ok # restart svc j .Lsysc_nr_ok # restart svc
# #
# _TIF_NOTIFY_RESUME is set, call do_notify_resume # _TIF_NOTIFY_RESUME is set, call do_notify_resume
# #
sysc_notify_resume: .Lsysc_notify_resume:
lgr %r2,%r11 # pass pointer to pt_regs lgr %r2,%r11 # pass pointer to pt_regs
larl %r14,sysc_return larl %r14,.Lsysc_return
jg do_notify_resume jg do_notify_resume
# #
# _TIF_UPROBE is set, call uprobe_notify_resume # _TIF_UPROBE is set, call uprobe_notify_resume
# #
#ifdef CONFIG_UPROBES #ifdef CONFIG_UPROBES
sysc_uprobe_notify: .Lsysc_uprobe_notify:
lgr %r2,%r11 # pass pointer to pt_regs lgr %r2,%r11 # pass pointer to pt_regs
larl %r14,sysc_return larl %r14,.Lsysc_return
jg uprobe_notify_resume jg uprobe_notify_resume
#endif #endif
# #
# _PIF_PER_TRAP is set, call do_per_trap # _PIF_PER_TRAP is set, call do_per_trap
# #
sysc_singlestep: .Lsysc_singlestep:
ni __PT_FLAGS+7(%r11),255-_PIF_PER_TRAP ni __PT_FLAGS+7(%r11),255-_PIF_PER_TRAP
lgr %r2,%r11 # pass pointer to pt_regs lgr %r2,%r11 # pass pointer to pt_regs
larl %r14,sysc_return larl %r14,.Lsysc_return
jg do_per_trap jg do_per_trap
# #
# call tracehook_report_syscall_entry/tracehook_report_syscall_exit before # call tracehook_report_syscall_entry/tracehook_report_syscall_exit before
# and after the system call # and after the system call
# #
sysc_tracesys: .Lsysc_tracesys:
lgr %r2,%r11 # pass pointer to pt_regs lgr %r2,%r11 # pass pointer to pt_regs
la %r3,0 la %r3,0
llgh %r0,__PT_INT_CODE+2(%r11) llgh %r0,__PT_INT_CODE+2(%r11)
@ -358,20 +358,20 @@ sysc_tracesys:
brasl %r14,do_syscall_trace_enter brasl %r14,do_syscall_trace_enter
lghi %r0,NR_syscalls lghi %r0,NR_syscalls
clgr %r0,%r2 clgr %r0,%r2
jnh sysc_tracenogo jnh .Lsysc_tracenogo
sllg %r8,%r2,2 sllg %r8,%r2,2
lgf %r9,0(%r8,%r10) lgf %r9,0(%r8,%r10)
sysc_tracego: .Lsysc_tracego:
lmg %r3,%r7,__PT_R3(%r11) lmg %r3,%r7,__PT_R3(%r11)
stg %r7,STACK_FRAME_OVERHEAD(%r15) stg %r7,STACK_FRAME_OVERHEAD(%r15)
lg %r2,__PT_ORIG_GPR2(%r11) lg %r2,__PT_ORIG_GPR2(%r11)
basr %r14,%r9 # call sys_xxx basr %r14,%r9 # call sys_xxx
stg %r2,__PT_R2(%r11) # store return value stg %r2,__PT_R2(%r11) # store return value
sysc_tracenogo: .Lsysc_tracenogo:
tm __TI_flags+7(%r12),_TIF_TRACE tm __TI_flags+7(%r12),_TIF_TRACE
jz sysc_return jz .Lsysc_return
lgr %r2,%r11 # pass pointer to pt_regs lgr %r2,%r11 # pass pointer to pt_regs
larl %r14,sysc_return larl %r14,.Lsysc_return
jg do_syscall_trace_exit jg do_syscall_trace_exit
# #
@ -384,13 +384,13 @@ ENTRY(ret_from_fork)
TRACE_IRQS_ON TRACE_IRQS_ON
ssm __LC_SVC_NEW_PSW # reenable interrupts ssm __LC_SVC_NEW_PSW # reenable interrupts
tm __PT_PSW+1(%r11),0x01 # forking a kernel thread ? tm __PT_PSW+1(%r11),0x01 # forking a kernel thread ?
jne sysc_tracenogo jne .Lsysc_tracenogo
# it's a kernel thread # it's a kernel thread
lmg %r9,%r10,__PT_R9(%r11) # load gprs lmg %r9,%r10,__PT_R9(%r11) # load gprs
ENTRY(kernel_thread_starter) ENTRY(kernel_thread_starter)
la %r2,0(%r10) la %r2,0(%r10)
basr %r14,%r9 basr %r14,%r9
j sysc_tracenogo j .Lsysc_tracenogo
/* /*
* Program check handler routine * Program check handler routine
@ -409,7 +409,7 @@ ENTRY(pgm_check_handler)
tmhh %r8,0x4000 # PER bit set in old PSW ? tmhh %r8,0x4000 # PER bit set in old PSW ?
jnz 0f # -> enabled, can't be a double fault jnz 0f # -> enabled, can't be a double fault
tm __LC_PGM_ILC+3,0x80 # check for per exception tm __LC_PGM_ILC+3,0x80 # check for per exception
jnz pgm_svcper # -> single stepped svc jnz .Lpgm_svcper # -> single stepped svc
0: CHECK_STACK STACK_SIZE,__LC_SAVE_AREA_SYNC 0: CHECK_STACK STACK_SIZE,__LC_SAVE_AREA_SYNC
aghi %r15,-(STACK_FRAME_OVERHEAD + __PT_SIZE) aghi %r15,-(STACK_FRAME_OVERHEAD + __PT_SIZE)
j 2f j 2f
@ -432,7 +432,7 @@ ENTRY(pgm_check_handler)
tm __LC_PGM_ILC+3,0x80 # check for per exception tm __LC_PGM_ILC+3,0x80 # check for per exception
jz 0f jz 0f
tmhh %r8,0x0001 # kernel per event ? tmhh %r8,0x0001 # kernel per event ?
jz pgm_kprobe jz .Lpgm_kprobe
oi __PT_FLAGS+7(%r11),_PIF_PER_TRAP oi __PT_FLAGS+7(%r11),_PIF_PER_TRAP
mvc __THREAD_per_address(8,%r14),__LC_PER_ADDRESS mvc __THREAD_per_address(8,%r14),__LC_PER_ADDRESS
mvc __THREAD_per_cause(2,%r14),__LC_PER_CODE mvc __THREAD_per_cause(2,%r14),__LC_PER_CODE
@ -443,31 +443,31 @@ ENTRY(pgm_check_handler)
llgh %r10,__PT_INT_CODE+2(%r11) llgh %r10,__PT_INT_CODE+2(%r11)
nill %r10,0x007f nill %r10,0x007f
sll %r10,2 sll %r10,2
je sysc_return je .Lsysc_return
lgf %r1,0(%r10,%r1) # load address of handler routine lgf %r1,0(%r10,%r1) # load address of handler routine
lgr %r2,%r11 # pass pointer to pt_regs lgr %r2,%r11 # pass pointer to pt_regs
basr %r14,%r1 # branch to interrupt-handler basr %r14,%r1 # branch to interrupt-handler
j sysc_return j .Lsysc_return
# #
# PER event in supervisor state, must be kprobes # PER event in supervisor state, must be kprobes
# #
pgm_kprobe: .Lpgm_kprobe:
REENABLE_IRQS REENABLE_IRQS
xc __SF_BACKCHAIN(8,%r15),__SF_BACKCHAIN(%r15) xc __SF_BACKCHAIN(8,%r15),__SF_BACKCHAIN(%r15)
lgr %r2,%r11 # pass pointer to pt_regs lgr %r2,%r11 # pass pointer to pt_regs
brasl %r14,do_per_trap brasl %r14,do_per_trap
j sysc_return j .Lsysc_return
# #
# single stepped system call # single stepped system call
# #
pgm_svcper: .Lpgm_svcper:
mvc __LC_RETURN_PSW(8),__LC_SVC_NEW_PSW mvc __LC_RETURN_PSW(8),__LC_SVC_NEW_PSW
larl %r14,sysc_per larl %r14,.Lsysc_per
stg %r14,__LC_RETURN_PSW+8 stg %r14,__LC_RETURN_PSW+8
lghi %r14,_PIF_SYSCALL | _PIF_PER_TRAP lghi %r14,_PIF_SYSCALL | _PIF_PER_TRAP
lpswe __LC_RETURN_PSW # branch to sysc_per and enable irqs lpswe __LC_RETURN_PSW # branch to .Lsysc_per and enable irqs
/* /*
* IO interrupt handler routine * IO interrupt handler routine
@ -483,10 +483,10 @@ ENTRY(io_int_handler)
HANDLE_SIE_INTERCEPT %r14,2 HANDLE_SIE_INTERCEPT %r14,2
SWITCH_ASYNC __LC_SAVE_AREA_ASYNC,__LC_ASYNC_STACK,STACK_SHIFT SWITCH_ASYNC __LC_SAVE_AREA_ASYNC,__LC_ASYNC_STACK,STACK_SHIFT
tmhh %r8,0x0001 # interrupting from user? tmhh %r8,0x0001 # interrupting from user?
jz io_skip jz .Lio_skip
UPDATE_VTIME %r14,__LC_ASYNC_ENTER_TIMER UPDATE_VTIME %r14,__LC_ASYNC_ENTER_TIMER
LAST_BREAK %r14 LAST_BREAK %r14
io_skip: .Lio_skip:
stmg %r0,%r7,__PT_R0(%r11) stmg %r0,%r7,__PT_R0(%r11)
mvc __PT_R8(64,%r11),__LC_SAVE_AREA_ASYNC mvc __PT_R8(64,%r11),__LC_SAVE_AREA_ASYNC
stmg %r8,%r9,__PT_PSW(%r11) stmg %r8,%r9,__PT_PSW(%r11)
@ -494,29 +494,29 @@ io_skip:
xc __PT_FLAGS(8,%r11),__PT_FLAGS(%r11) xc __PT_FLAGS(8,%r11),__PT_FLAGS(%r11)
TRACE_IRQS_OFF TRACE_IRQS_OFF
xc __SF_BACKCHAIN(8,%r15),__SF_BACKCHAIN(%r15) xc __SF_BACKCHAIN(8,%r15),__SF_BACKCHAIN(%r15)
io_loop: .Lio_loop:
lgr %r2,%r11 # pass pointer to pt_regs lgr %r2,%r11 # pass pointer to pt_regs
lghi %r3,IO_INTERRUPT lghi %r3,IO_INTERRUPT
tm __PT_INT_CODE+8(%r11),0x80 # adapter interrupt ? tm __PT_INT_CODE+8(%r11),0x80 # adapter interrupt ?
jz io_call jz .Lio_call
lghi %r3,THIN_INTERRUPT lghi %r3,THIN_INTERRUPT
io_call: .Lio_call:
brasl %r14,do_IRQ brasl %r14,do_IRQ
tm __LC_MACHINE_FLAGS+6,0x10 # MACHINE_FLAG_LPAR tm __LC_MACHINE_FLAGS+6,0x10 # MACHINE_FLAG_LPAR
jz io_return jz .Lio_return
tpi 0 tpi 0
jz io_return jz .Lio_return
mvc __PT_INT_CODE(12,%r11),__LC_SUBCHANNEL_ID mvc __PT_INT_CODE(12,%r11),__LC_SUBCHANNEL_ID
j io_loop j .Lio_loop
io_return: .Lio_return:
LOCKDEP_SYS_EXIT LOCKDEP_SYS_EXIT
TRACE_IRQS_ON TRACE_IRQS_ON
io_tif: .Lio_tif:
tm __TI_flags+7(%r12),_TIF_WORK tm __TI_flags+7(%r12),_TIF_WORK
jnz io_work # there is work to do (signals etc.) jnz .Lio_work # there is work to do (signals etc.)
tm __LC_CPU_FLAGS+7,_CIF_WORK tm __LC_CPU_FLAGS+7,_CIF_WORK
jnz io_work jnz .Lio_work
io_restore: .Lio_restore:
lg %r14,__LC_VDSO_PER_CPU lg %r14,__LC_VDSO_PER_CPU
lmg %r0,%r10,__PT_R0(%r11) lmg %r0,%r10,__PT_R0(%r11)
mvc __LC_RETURN_PSW(16),__PT_PSW(%r11) mvc __LC_RETURN_PSW(16),__PT_PSW(%r11)
@ -524,7 +524,7 @@ io_restore:
mvc __VDSO_ECTG_BASE(16,%r14),__LC_EXIT_TIMER mvc __VDSO_ECTG_BASE(16,%r14),__LC_EXIT_TIMER
lmg %r11,%r15,__PT_R11(%r11) lmg %r11,%r15,__PT_R11(%r11)
lpswe __LC_RETURN_PSW lpswe __LC_RETURN_PSW
io_done: .Lio_done:
# #
# There is work todo, find out in which context we have been interrupted: # There is work todo, find out in which context we have been interrupted:
@ -535,15 +535,15 @@ io_done:
# the preemption counter and if it is zero call preempt_schedule_irq # the preemption counter and if it is zero call preempt_schedule_irq
# Before any work can be done, a switch to the kernel stack is required. # Before any work can be done, a switch to the kernel stack is required.
# #
io_work: .Lio_work:
tm __PT_PSW+1(%r11),0x01 # returning to user ? tm __PT_PSW+1(%r11),0x01 # returning to user ?
jo io_work_user # yes -> do resched & signal jo .Lio_work_user # yes -> do resched & signal
#ifdef CONFIG_PREEMPT #ifdef CONFIG_PREEMPT
# check for preemptive scheduling # check for preemptive scheduling
icm %r0,15,__TI_precount(%r12) icm %r0,15,__TI_precount(%r12)
jnz io_restore # preemption is disabled jnz .Lio_restore # preemption is disabled
tm __TI_flags+7(%r12),_TIF_NEED_RESCHED tm __TI_flags+7(%r12),_TIF_NEED_RESCHED
jno io_restore jno .Lio_restore
# switch to kernel stack # switch to kernel stack
lg %r1,__PT_R15(%r11) lg %r1,__PT_R15(%r11)
aghi %r1,-(STACK_FRAME_OVERHEAD + __PT_SIZE) aghi %r1,-(STACK_FRAME_OVERHEAD + __PT_SIZE)
@ -551,19 +551,19 @@ io_work:
xc __SF_BACKCHAIN(8,%r1),__SF_BACKCHAIN(%r1) xc __SF_BACKCHAIN(8,%r1),__SF_BACKCHAIN(%r1)
la %r11,STACK_FRAME_OVERHEAD(%r1) la %r11,STACK_FRAME_OVERHEAD(%r1)
lgr %r15,%r1 lgr %r15,%r1
# TRACE_IRQS_ON already done at io_return, call # TRACE_IRQS_ON already done at .Lio_return, call
# TRACE_IRQS_OFF to keep things symmetrical # TRACE_IRQS_OFF to keep things symmetrical
TRACE_IRQS_OFF TRACE_IRQS_OFF
brasl %r14,preempt_schedule_irq brasl %r14,preempt_schedule_irq
j io_return j .Lio_return
#else #else
j io_restore j .Lio_restore
#endif #endif
# #
# Need to do work before returning to userspace, switch to kernel stack # Need to do work before returning to userspace, switch to kernel stack
# #
io_work_user: .Lio_work_user:
lg %r1,__LC_KERNEL_STACK lg %r1,__LC_KERNEL_STACK
mvc STACK_FRAME_OVERHEAD(__PT_SIZE,%r1),0(%r11) mvc STACK_FRAME_OVERHEAD(__PT_SIZE,%r1),0(%r11)
xc __SF_BACKCHAIN(8,%r1),__SF_BACKCHAIN(%r1) xc __SF_BACKCHAIN(8,%r1),__SF_BACKCHAIN(%r1)
@ -573,70 +573,70 @@ io_work_user:
# #
# One of the work bits is on. Find out which one. # One of the work bits is on. Find out which one.
# #
io_work_tif: .Lio_work_tif:
tm __LC_CPU_FLAGS+7,_CIF_MCCK_PENDING tm __LC_CPU_FLAGS+7,_CIF_MCCK_PENDING
jo io_mcck_pending jo .Lio_mcck_pending
tm __TI_flags+7(%r12),_TIF_NEED_RESCHED tm __TI_flags+7(%r12),_TIF_NEED_RESCHED
jo io_reschedule jo .Lio_reschedule
tm __TI_flags+7(%r12),_TIF_SIGPENDING tm __TI_flags+7(%r12),_TIF_SIGPENDING
jo io_sigpending jo .Lio_sigpending
tm __TI_flags+7(%r12),_TIF_NOTIFY_RESUME tm __TI_flags+7(%r12),_TIF_NOTIFY_RESUME
jo io_notify_resume jo .Lio_notify_resume
tm __LC_CPU_FLAGS+7,_CIF_ASCE tm __LC_CPU_FLAGS+7,_CIF_ASCE
jo io_uaccess jo .Lio_uaccess
j io_return # beware of critical section cleanup j .Lio_return # beware of critical section cleanup
# #
# _CIF_MCCK_PENDING is set, call handler # _CIF_MCCK_PENDING is set, call handler
# #
io_mcck_pending: .Lio_mcck_pending:
# TRACE_IRQS_ON already done at io_return # TRACE_IRQS_ON already done at .Lio_return
brasl %r14,s390_handle_mcck # TIF bit will be cleared by handler brasl %r14,s390_handle_mcck # TIF bit will be cleared by handler
TRACE_IRQS_OFF TRACE_IRQS_OFF
j io_return j .Lio_return
# #
# _CIF_ASCE is set, load user space asce # _CIF_ASCE is set, load user space asce
# #
io_uaccess: .Lio_uaccess:
ni __LC_CPU_FLAGS+7,255-_CIF_ASCE ni __LC_CPU_FLAGS+7,255-_CIF_ASCE
lctlg %c1,%c1,__LC_USER_ASCE # load primary asce lctlg %c1,%c1,__LC_USER_ASCE # load primary asce
j io_return j .Lio_return
# #
# _TIF_NEED_RESCHED is set, call schedule # _TIF_NEED_RESCHED is set, call schedule
# #
io_reschedule: .Lio_reschedule:
# TRACE_IRQS_ON already done at io_return # TRACE_IRQS_ON already done at .Lio_return
ssm __LC_SVC_NEW_PSW # reenable interrupts ssm __LC_SVC_NEW_PSW # reenable interrupts
brasl %r14,schedule # call scheduler brasl %r14,schedule # call scheduler
ssm __LC_PGM_NEW_PSW # disable I/O and ext. interrupts ssm __LC_PGM_NEW_PSW # disable I/O and ext. interrupts
TRACE_IRQS_OFF TRACE_IRQS_OFF
j io_return j .Lio_return
# #
# _TIF_SIGPENDING or is set, call do_signal # _TIF_SIGPENDING or is set, call do_signal
# #
io_sigpending: .Lio_sigpending:
# TRACE_IRQS_ON already done at io_return # TRACE_IRQS_ON already done at .Lio_return
ssm __LC_SVC_NEW_PSW # reenable interrupts ssm __LC_SVC_NEW_PSW # reenable interrupts
lgr %r2,%r11 # pass pointer to pt_regs lgr %r2,%r11 # pass pointer to pt_regs
brasl %r14,do_signal brasl %r14,do_signal
ssm __LC_PGM_NEW_PSW # disable I/O and ext. interrupts ssm __LC_PGM_NEW_PSW # disable I/O and ext. interrupts
TRACE_IRQS_OFF TRACE_IRQS_OFF
j io_return j .Lio_return
# #
# _TIF_NOTIFY_RESUME or is set, call do_notify_resume # _TIF_NOTIFY_RESUME or is set, call do_notify_resume
# #
io_notify_resume: .Lio_notify_resume:
# TRACE_IRQS_ON already done at io_return # TRACE_IRQS_ON already done at .Lio_return
ssm __LC_SVC_NEW_PSW # reenable interrupts ssm __LC_SVC_NEW_PSW # reenable interrupts
lgr %r2,%r11 # pass pointer to pt_regs lgr %r2,%r11 # pass pointer to pt_regs
brasl %r14,do_notify_resume brasl %r14,do_notify_resume
ssm __LC_PGM_NEW_PSW # disable I/O and ext. interrupts ssm __LC_PGM_NEW_PSW # disable I/O and ext. interrupts
TRACE_IRQS_OFF TRACE_IRQS_OFF
j io_return j .Lio_return
/* /*
* External interrupt handler routine * External interrupt handler routine
@ -652,10 +652,10 @@ ENTRY(ext_int_handler)
HANDLE_SIE_INTERCEPT %r14,3 HANDLE_SIE_INTERCEPT %r14,3
SWITCH_ASYNC __LC_SAVE_AREA_ASYNC,__LC_ASYNC_STACK,STACK_SHIFT SWITCH_ASYNC __LC_SAVE_AREA_ASYNC,__LC_ASYNC_STACK,STACK_SHIFT
tmhh %r8,0x0001 # interrupting from user ? tmhh %r8,0x0001 # interrupting from user ?
jz ext_skip jz .Lext_skip
UPDATE_VTIME %r14,__LC_ASYNC_ENTER_TIMER UPDATE_VTIME %r14,__LC_ASYNC_ENTER_TIMER
LAST_BREAK %r14 LAST_BREAK %r14
ext_skip: .Lext_skip:
stmg %r0,%r7,__PT_R0(%r11) stmg %r0,%r7,__PT_R0(%r11)
mvc __PT_R8(64,%r11),__LC_SAVE_AREA_ASYNC mvc __PT_R8(64,%r11),__LC_SAVE_AREA_ASYNC
stmg %r8,%r9,__PT_PSW(%r11) stmg %r8,%r9,__PT_PSW(%r11)
@ -669,23 +669,23 @@ ext_skip:
lgr %r2,%r11 # pass pointer to pt_regs lgr %r2,%r11 # pass pointer to pt_regs
lghi %r3,EXT_INTERRUPT lghi %r3,EXT_INTERRUPT
brasl %r14,do_IRQ brasl %r14,do_IRQ
j io_return j .Lio_return
/* /*
* Load idle PSW. The second "half" of this function is in cleanup_idle. * Load idle PSW. The second "half" of this function is in .Lcleanup_idle.
*/ */
ENTRY(psw_idle) ENTRY(psw_idle)
stg %r3,__SF_EMPTY(%r15) stg %r3,__SF_EMPTY(%r15)
larl %r1,psw_idle_lpsw+4 larl %r1,.Lpsw_idle_lpsw+4
stg %r1,__SF_EMPTY+8(%r15) stg %r1,__SF_EMPTY+8(%r15)
STCK __CLOCK_IDLE_ENTER(%r2) STCK __CLOCK_IDLE_ENTER(%r2)
stpt __TIMER_IDLE_ENTER(%r2) stpt __TIMER_IDLE_ENTER(%r2)
psw_idle_lpsw: .Lpsw_idle_lpsw:
lpswe __SF_EMPTY(%r15) lpswe __SF_EMPTY(%r15)
br %r14 br %r14
psw_idle_end: .Lpsw_idle_end:
__critical_end: .L__critical_end:
/* /*
* Machine check handler routines * Machine check handler routines
@ -701,7 +701,7 @@ ENTRY(mcck_int_handler)
lmg %r8,%r9,__LC_MCK_OLD_PSW lmg %r8,%r9,__LC_MCK_OLD_PSW
HANDLE_SIE_INTERCEPT %r14,4 HANDLE_SIE_INTERCEPT %r14,4
tm __LC_MCCK_CODE,0x80 # system damage? tm __LC_MCCK_CODE,0x80 # system damage?
jo mcck_panic # yes -> rest of mcck code invalid jo .Lmcck_panic # yes -> rest of mcck code invalid
lghi %r14,__LC_CPU_TIMER_SAVE_AREA lghi %r14,__LC_CPU_TIMER_SAVE_AREA
mvc __LC_MCCK_ENTER_TIMER(8),0(%r14) mvc __LC_MCCK_ENTER_TIMER(8),0(%r14)
tm __LC_MCCK_CODE+5,0x02 # stored cpu timer value valid? tm __LC_MCCK_CODE+5,0x02 # stored cpu timer value valid?
@ -719,13 +719,13 @@ ENTRY(mcck_int_handler)
2: spt 0(%r14) 2: spt 0(%r14)
mvc __LC_MCCK_ENTER_TIMER(8),0(%r14) mvc __LC_MCCK_ENTER_TIMER(8),0(%r14)
3: tm __LC_MCCK_CODE+2,0x09 # mwp + ia of old psw valid? 3: tm __LC_MCCK_CODE+2,0x09 # mwp + ia of old psw valid?
jno mcck_panic # no -> skip cleanup critical jno .Lmcck_panic # no -> skip cleanup critical
SWITCH_ASYNC __LC_GPREGS_SAVE_AREA+64,__LC_PANIC_STACK,PAGE_SHIFT SWITCH_ASYNC __LC_GPREGS_SAVE_AREA+64,__LC_PANIC_STACK,PAGE_SHIFT
tm %r8,0x0001 # interrupting from user ? tm %r8,0x0001 # interrupting from user ?
jz mcck_skip jz .Lmcck_skip
UPDATE_VTIME %r14,__LC_MCCK_ENTER_TIMER UPDATE_VTIME %r14,__LC_MCCK_ENTER_TIMER
LAST_BREAK %r14 LAST_BREAK %r14
mcck_skip: .Lmcck_skip:
lghi %r14,__LC_GPREGS_SAVE_AREA+64 lghi %r14,__LC_GPREGS_SAVE_AREA+64
stmg %r0,%r7,__PT_R0(%r11) stmg %r0,%r7,__PT_R0(%r11)
mvc __PT_R8(64,%r11),0(%r14) mvc __PT_R8(64,%r11),0(%r14)
@ -735,7 +735,7 @@ mcck_skip:
lgr %r2,%r11 # pass pointer to pt_regs lgr %r2,%r11 # pass pointer to pt_regs
brasl %r14,s390_do_machine_check brasl %r14,s390_do_machine_check
tm __PT_PSW+1(%r11),0x01 # returning to user ? tm __PT_PSW+1(%r11),0x01 # returning to user ?
jno mcck_return jno .Lmcck_return
lg %r1,__LC_KERNEL_STACK # switch to kernel stack lg %r1,__LC_KERNEL_STACK # switch to kernel stack
mvc STACK_FRAME_OVERHEAD(__PT_SIZE,%r1),0(%r11) mvc STACK_FRAME_OVERHEAD(__PT_SIZE,%r1),0(%r11)
xc __SF_BACKCHAIN(8,%r1),__SF_BACKCHAIN(%r1) xc __SF_BACKCHAIN(8,%r1),__SF_BACKCHAIN(%r1)
@ -743,11 +743,11 @@ mcck_skip:
lgr %r15,%r1 lgr %r15,%r1
ssm __LC_PGM_NEW_PSW # turn dat on, keep irqs off ssm __LC_PGM_NEW_PSW # turn dat on, keep irqs off
tm __LC_CPU_FLAGS+7,_CIF_MCCK_PENDING tm __LC_CPU_FLAGS+7,_CIF_MCCK_PENDING
jno mcck_return jno .Lmcck_return
TRACE_IRQS_OFF TRACE_IRQS_OFF
brasl %r14,s390_handle_mcck brasl %r14,s390_handle_mcck
TRACE_IRQS_ON TRACE_IRQS_ON
mcck_return: .Lmcck_return:
lg %r14,__LC_VDSO_PER_CPU lg %r14,__LC_VDSO_PER_CPU
lmg %r0,%r10,__PT_R0(%r11) lmg %r0,%r10,__PT_R0(%r11)
mvc __LC_RETURN_MCCK_PSW(16),__PT_PSW(%r11) # move return PSW mvc __LC_RETURN_MCCK_PSW(16),__PT_PSW(%r11) # move return PSW
@ -758,14 +758,14 @@ mcck_return:
0: lmg %r11,%r15,__PT_R11(%r11) 0: lmg %r11,%r15,__PT_R11(%r11)
lpswe __LC_RETURN_MCCK_PSW lpswe __LC_RETURN_MCCK_PSW
mcck_panic: .Lmcck_panic:
lg %r14,__LC_PANIC_STACK lg %r14,__LC_PANIC_STACK
slgr %r14,%r15 slgr %r14,%r15
srag %r14,%r14,PAGE_SHIFT srag %r14,%r14,PAGE_SHIFT
jz 0f jz 0f
lg %r15,__LC_PANIC_STACK lg %r15,__LC_PANIC_STACK
0: aghi %r15,-(STACK_FRAME_OVERHEAD + __PT_SIZE) 0: aghi %r15,-(STACK_FRAME_OVERHEAD + __PT_SIZE)
j mcck_skip j .Lmcck_skip
# #
# PSW restart interrupt handler # PSW restart interrupt handler
@ -815,69 +815,69 @@ stack_overflow:
#endif #endif
.align 8 .align 8
cleanup_table: .Lcleanup_table:
.quad system_call .quad system_call
.quad sysc_do_svc .quad .Lsysc_do_svc
.quad sysc_tif .quad .Lsysc_tif
.quad sysc_restore .quad .Lsysc_restore
.quad sysc_done .quad .Lsysc_done
.quad io_tif .quad .Lio_tif
.quad io_restore .quad .Lio_restore
.quad io_done .quad .Lio_done
.quad psw_idle .quad psw_idle
.quad psw_idle_end .quad .Lpsw_idle_end
cleanup_critical: cleanup_critical:
clg %r9,BASED(cleanup_table) # system_call clg %r9,BASED(.Lcleanup_table) # system_call
jl 0f jl 0f
clg %r9,BASED(cleanup_table+8) # sysc_do_svc clg %r9,BASED(.Lcleanup_table+8) # .Lsysc_do_svc
jl cleanup_system_call jl .Lcleanup_system_call
clg %r9,BASED(cleanup_table+16) # sysc_tif clg %r9,BASED(.Lcleanup_table+16) # .Lsysc_tif
jl 0f jl 0f
clg %r9,BASED(cleanup_table+24) # sysc_restore clg %r9,BASED(.Lcleanup_table+24) # .Lsysc_restore
jl cleanup_sysc_tif jl .Lcleanup_sysc_tif
clg %r9,BASED(cleanup_table+32) # sysc_done clg %r9,BASED(.Lcleanup_table+32) # .Lsysc_done
jl cleanup_sysc_restore jl .Lcleanup_sysc_restore
clg %r9,BASED(cleanup_table+40) # io_tif clg %r9,BASED(.Lcleanup_table+40) # .Lio_tif
jl 0f jl 0f
clg %r9,BASED(cleanup_table+48) # io_restore clg %r9,BASED(.Lcleanup_table+48) # .Lio_restore
jl cleanup_io_tif jl .Lcleanup_io_tif
clg %r9,BASED(cleanup_table+56) # io_done clg %r9,BASED(.Lcleanup_table+56) # .Lio_done
jl cleanup_io_restore jl .Lcleanup_io_restore
clg %r9,BASED(cleanup_table+64) # psw_idle clg %r9,BASED(.Lcleanup_table+64) # psw_idle
jl 0f jl 0f
clg %r9,BASED(cleanup_table+72) # psw_idle_end clg %r9,BASED(.Lcleanup_table+72) # .Lpsw_idle_end
jl cleanup_idle jl .Lcleanup_idle
0: br %r14 0: br %r14
cleanup_system_call: .Lcleanup_system_call:
# check if stpt has been executed # check if stpt has been executed
clg %r9,BASED(cleanup_system_call_insn) clg %r9,BASED(.Lcleanup_system_call_insn)
jh 0f jh 0f
mvc __LC_SYNC_ENTER_TIMER(8),__LC_ASYNC_ENTER_TIMER mvc __LC_SYNC_ENTER_TIMER(8),__LC_ASYNC_ENTER_TIMER
cghi %r11,__LC_SAVE_AREA_ASYNC cghi %r11,__LC_SAVE_AREA_ASYNC
je 0f je 0f
mvc __LC_SYNC_ENTER_TIMER(8),__LC_MCCK_ENTER_TIMER mvc __LC_SYNC_ENTER_TIMER(8),__LC_MCCK_ENTER_TIMER
0: # check if stmg has been executed 0: # check if stmg has been executed
clg %r9,BASED(cleanup_system_call_insn+8) clg %r9,BASED(.Lcleanup_system_call_insn+8)
jh 0f jh 0f
mvc __LC_SAVE_AREA_SYNC(64),0(%r11) mvc __LC_SAVE_AREA_SYNC(64),0(%r11)
0: # check if base register setup + TIF bit load has been done 0: # check if base register setup + TIF bit load has been done
clg %r9,BASED(cleanup_system_call_insn+16) clg %r9,BASED(.Lcleanup_system_call_insn+16)
jhe 0f jhe 0f
# set up saved registers r10 and r12 # set up saved registers r10 and r12
stg %r10,16(%r11) # r10 last break stg %r10,16(%r11) # r10 last break
stg %r12,32(%r11) # r12 thread-info pointer stg %r12,32(%r11) # r12 thread-info pointer
0: # check if the user time update has been done 0: # check if the user time update has been done
clg %r9,BASED(cleanup_system_call_insn+24) clg %r9,BASED(.Lcleanup_system_call_insn+24)
jh 0f jh 0f
lg %r15,__LC_EXIT_TIMER lg %r15,__LC_EXIT_TIMER
slg %r15,__LC_SYNC_ENTER_TIMER slg %r15,__LC_SYNC_ENTER_TIMER
alg %r15,__LC_USER_TIMER alg %r15,__LC_USER_TIMER
stg %r15,__LC_USER_TIMER stg %r15,__LC_USER_TIMER
0: # check if the system time update has been done 0: # check if the system time update has been done
clg %r9,BASED(cleanup_system_call_insn+32) clg %r9,BASED(.Lcleanup_system_call_insn+32)
jh 0f jh 0f
lg %r15,__LC_LAST_UPDATE_TIMER lg %r15,__LC_LAST_UPDATE_TIMER
slg %r15,__LC_EXIT_TIMER slg %r15,__LC_EXIT_TIMER
@ -904,21 +904,21 @@ cleanup_system_call:
# setup saved register r15 # setup saved register r15
stg %r15,56(%r11) # r15 stack pointer stg %r15,56(%r11) # r15 stack pointer
# set new psw address and exit # set new psw address and exit
larl %r9,sysc_do_svc larl %r9,.Lsysc_do_svc
br %r14 br %r14
cleanup_system_call_insn: .Lcleanup_system_call_insn:
.quad system_call .quad system_call
.quad sysc_stmg .quad .Lsysc_stmg
.quad sysc_per .quad .Lsysc_per
.quad sysc_vtime+18 .quad .Lsysc_vtime+18
.quad sysc_vtime+42 .quad .Lsysc_vtime+42
cleanup_sysc_tif: .Lcleanup_sysc_tif:
larl %r9,sysc_tif larl %r9,.Lsysc_tif
br %r14 br %r14
cleanup_sysc_restore: .Lcleanup_sysc_restore:
clg %r9,BASED(cleanup_sysc_restore_insn) clg %r9,BASED(.Lcleanup_sysc_restore_insn)
je 0f je 0f
lg %r9,24(%r11) # get saved pointer to pt_regs lg %r9,24(%r11) # get saved pointer to pt_regs
mvc __LC_RETURN_PSW(16),__PT_PSW(%r9) mvc __LC_RETURN_PSW(16),__PT_PSW(%r9)
@ -926,15 +926,15 @@ cleanup_sysc_restore:
lmg %r0,%r7,__PT_R0(%r9) lmg %r0,%r7,__PT_R0(%r9)
0: lmg %r8,%r9,__LC_RETURN_PSW 0: lmg %r8,%r9,__LC_RETURN_PSW
br %r14 br %r14
cleanup_sysc_restore_insn: .Lcleanup_sysc_restore_insn:
.quad sysc_done - 4 .quad .Lsysc_done - 4
cleanup_io_tif: .Lcleanup_io_tif:
larl %r9,io_tif larl %r9,.Lio_tif
br %r14 br %r14
cleanup_io_restore: .Lcleanup_io_restore:
clg %r9,BASED(cleanup_io_restore_insn) clg %r9,BASED(.Lcleanup_io_restore_insn)
je 0f je 0f
lg %r9,24(%r11) # get saved r11 pointer to pt_regs lg %r9,24(%r11) # get saved r11 pointer to pt_regs
mvc __LC_RETURN_PSW(16),__PT_PSW(%r9) mvc __LC_RETURN_PSW(16),__PT_PSW(%r9)
@ -942,10 +942,10 @@ cleanup_io_restore:
lmg %r0,%r7,__PT_R0(%r9) lmg %r0,%r7,__PT_R0(%r9)
0: lmg %r8,%r9,__LC_RETURN_PSW 0: lmg %r8,%r9,__LC_RETURN_PSW
br %r14 br %r14
cleanup_io_restore_insn: .Lcleanup_io_restore_insn:
.quad io_done - 4 .quad .Lio_done - 4
cleanup_idle: .Lcleanup_idle:
# copy interrupt clock & cpu timer # copy interrupt clock & cpu timer
mvc __CLOCK_IDLE_EXIT(8,%r2),__LC_INT_CLOCK mvc __CLOCK_IDLE_EXIT(8,%r2),__LC_INT_CLOCK
mvc __TIMER_IDLE_EXIT(8,%r2),__LC_ASYNC_ENTER_TIMER mvc __TIMER_IDLE_EXIT(8,%r2),__LC_ASYNC_ENTER_TIMER
@ -954,7 +954,7 @@ cleanup_idle:
mvc __CLOCK_IDLE_EXIT(8,%r2),__LC_MCCK_CLOCK mvc __CLOCK_IDLE_EXIT(8,%r2),__LC_MCCK_CLOCK
mvc __TIMER_IDLE_EXIT(8,%r2),__LC_MCCK_ENTER_TIMER mvc __TIMER_IDLE_EXIT(8,%r2),__LC_MCCK_ENTER_TIMER
0: # check if stck & stpt have been executed 0: # check if stck & stpt have been executed
clg %r9,BASED(cleanup_idle_insn) clg %r9,BASED(.Lcleanup_idle_insn)
jhe 1f jhe 1f
mvc __CLOCK_IDLE_ENTER(8,%r2),__CLOCK_IDLE_EXIT(%r2) mvc __CLOCK_IDLE_ENTER(8,%r2),__CLOCK_IDLE_EXIT(%r2)
mvc __TIMER_IDLE_ENTER(8,%r2),__TIMER_IDLE_EXIT(%r2) mvc __TIMER_IDLE_ENTER(8,%r2),__TIMER_IDLE_EXIT(%r2)
@ -973,17 +973,17 @@ cleanup_idle:
nihh %r8,0xfcfd # clear irq & wait state bits nihh %r8,0xfcfd # clear irq & wait state bits
lg %r9,48(%r11) # return from psw_idle lg %r9,48(%r11) # return from psw_idle
br %r14 br %r14
cleanup_idle_insn: .Lcleanup_idle_insn:
.quad psw_idle_lpsw .quad .Lpsw_idle_lpsw
/* /*
* Integer constants * Integer constants
*/ */
.align 8 .align 8
.Lcritical_start: .Lcritical_start:
.quad __critical_start .quad .L__critical_start
.Lcritical_length: .Lcritical_length:
.quad __critical_end - __critical_start .quad .L__critical_end - .L__critical_start
#if IS_ENABLED(CONFIG_KVM) #if IS_ENABLED(CONFIG_KVM)
@ -1000,25 +1000,25 @@ ENTRY(sie64a)
lmg %r0,%r13,0(%r3) # load guest gprs 0-13 lmg %r0,%r13,0(%r3) # load guest gprs 0-13
lg %r14,__LC_GMAP # get gmap pointer lg %r14,__LC_GMAP # get gmap pointer
ltgr %r14,%r14 ltgr %r14,%r14
jz sie_gmap jz .Lsie_gmap
lctlg %c1,%c1,__GMAP_ASCE(%r14) # load primary asce lctlg %c1,%c1,__GMAP_ASCE(%r14) # load primary asce
sie_gmap: .Lsie_gmap:
lg %r14,__SF_EMPTY(%r15) # get control block pointer lg %r14,__SF_EMPTY(%r15) # get control block pointer
oi __SIE_PROG0C+3(%r14),1 # we are going into SIE now oi __SIE_PROG0C+3(%r14),1 # we are going into SIE now
tm __SIE_PROG20+3(%r14),1 # last exit... tm __SIE_PROG20+3(%r14),1 # last exit...
jnz sie_done jnz .Lsie_done
LPP __SF_EMPTY(%r15) # set guest id LPP __SF_EMPTY(%r15) # set guest id
sie 0(%r14) sie 0(%r14)
sie_done: .Lsie_done:
LPP __SF_EMPTY+16(%r15) # set host id LPP __SF_EMPTY+16(%r15) # set host id
ni __SIE_PROG0C+3(%r14),0xfe # no longer in SIE ni __SIE_PROG0C+3(%r14),0xfe # no longer in SIE
lctlg %c1,%c1,__LC_USER_ASCE # load primary asce lctlg %c1,%c1,__LC_USER_ASCE # load primary asce
# some program checks are suppressing. C code (e.g. do_protection_exception) # some program checks are suppressing. C code (e.g. do_protection_exception)
# will rewind the PSW by the ILC, which is 4 bytes in case of SIE. Other # will rewind the PSW by the ILC, which is 4 bytes in case of SIE. Other
# instructions between sie64a and sie_done should not cause program # instructions between sie64a and .Lsie_done should not cause program
# interrupts. So lets use a nop (47 00 00 00) as a landing pad. # interrupts. So lets use a nop (47 00 00 00) as a landing pad.
# See also HANDLE_SIE_INTERCEPT # See also HANDLE_SIE_INTERCEPT
rewind_pad: .Lrewind_pad:
nop 0 nop 0
.globl sie_exit .globl sie_exit
sie_exit: sie_exit:
@ -1027,19 +1027,19 @@ sie_exit:
lmg %r6,%r14,__SF_GPRS(%r15) # restore kernel registers lmg %r6,%r14,__SF_GPRS(%r15) # restore kernel registers
lg %r2,__SF_EMPTY+24(%r15) # return exit reason code lg %r2,__SF_EMPTY+24(%r15) # return exit reason code
br %r14 br %r14
sie_fault: .Lsie_fault:
lghi %r14,-EFAULT lghi %r14,-EFAULT
stg %r14,__SF_EMPTY+24(%r15) # set exit reason code stg %r14,__SF_EMPTY+24(%r15) # set exit reason code
j sie_exit j sie_exit
.align 8 .align 8
.Lsie_critical: .Lsie_critical:
.quad sie_gmap .quad .Lsie_gmap
.Lsie_critical_length: .Lsie_critical_length:
.quad sie_done - sie_gmap .quad .Lsie_done - .Lsie_gmap
EX_TABLE(rewind_pad,sie_fault) EX_TABLE(.Lrewind_pad,.Lsie_fault)
EX_TABLE(sie_exit,sie_fault) EX_TABLE(sie_exit,.Lsie_fault)
#endif #endif
.section .rodata, "a" .section .rodata, "a"