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[S390] Fix irq tracing and lockdep_sys_exit calls.

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Current support for TRACE_IRQFLAGS and lockdep_sys_exit is broken.
IRQ flag tracing is broken for program checks. Even worse is that
the newly introduced calls to lockdep_sys_exit are in the critical
section code which is not supposed to call any C functions. In
addition the checks if locks are still held are also done when
returning to kernel code which is broken as well.
Fix all this by disabling interrupts and machine checks at the
exit paths and then do the appropriate checks and calls.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Heiko Carstens 2007-11-20 11:13:32 +01:00 committed by Martin Schwidefsky
parent 7aa8dac7ac
commit 411788ea7f
4 changed files with 158 additions and 66 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

109
arch/s390/kernel/entry.S
View File

@ -69,13 +69,31 @@ STACK_SIZE = 1 << STACK_SHIFT
basr %r14,%r1
.endm
.macro LOCKDEP_SYS_EXIT
l %r1,BASED(.Llockdep_sys_exit)
.macro TRACE_IRQS_CHECK
tm SP_PSW(%r15),0x03 # irqs enabled?
jz 0f
l %r1,BASED(.Ltrace_irq_on)
basr %r14,%r1
j 1f
0: l %r1,BASED(.Ltrace_irq_off)
basr %r14,%r1
1:
.endm
#else
#define TRACE_IRQS_ON
#define TRACE_IRQS_OFF
#define TRACE_IRQS_CHECK
#endif
#ifdef CONFIG_LOCKDEP
.macro LOCKDEP_SYS_EXIT
tm SP_PSW+1(%r15),0x01 # returning to user ?
jz 0f
l %r1,BASED(.Llockdep_sys_exit)
basr %r14,%r1
0:
.endm
#else
#define LOCKDEP_SYS_EXIT
#endif
@ -234,8 +252,6 @@ sysc_saveall:
lh %r7,0x8a # get svc number from lowcore
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
sysc_vtime:
tm SP_PSW+1(%r15),0x01 # interrupting from user ?
bz BASED(sysc_do_svc)
UPDATE_VTIME __LC_EXIT_TIMER,__LC_SYNC_ENTER_TIMER,__LC_USER_TIMER
sysc_stime:
UPDATE_VTIME __LC_LAST_UPDATE_TIMER,__LC_EXIT_TIMER,__LC_SYSTEM_TIMER
@ -263,19 +279,34 @@ sysc_do_restart:
sysc_return:
tm SP_PSW+1(%r15),0x01 # returning to user ?
bno BASED(sysc_leave)
bno BASED(sysc_restore)
tm __TI_flags+3(%r9),_TIF_WORK_SVC
bnz BASED(sysc_work) # there is work to do (signals etc.)
sysc_restore:
#ifdef CONFIG_TRACE_IRQFLAGS
la %r1,BASED(sysc_restore_trace_psw)
lpsw 0(%r1)
sysc_restore_trace:
TRACE_IRQS_CHECK
LOCKDEP_SYS_EXIT
#endif
sysc_leave:
RESTORE_ALL __LC_RETURN_PSW,1
sysc_done:
#ifdef CONFIG_TRACE_IRQFLAGS
.align 8
.globl sysc_restore_trace_psw
sysc_restore_trace_psw:
.long 0, sysc_restore_trace + 0x80000000
#endif
#
# recheck if there is more work to do
#
sysc_work_loop:
tm __TI_flags+3(%r9),_TIF_WORK_SVC
bz BASED(sysc_leave) # there is no work to do
bz BASED(sysc_restore) # there is no work to do
#
# One of the work bits is on. Find out which one.
#
@ -290,8 +321,8 @@ sysc_work:
bo BASED(sysc_restart)
tm __TI_flags+3(%r9),_TIF_SINGLE_STEP
bo BASED(sysc_singlestep)
LOCKDEP_SYS_EXIT
b BASED(sysc_leave)
b BASED(sysc_restore)
sysc_work_done:
#
# _TIF_NEED_RESCHED is set, call schedule
@ -458,6 +489,7 @@ pgm_check_handler:
pgm_no_vtime:
#endif
l %r9,__LC_THREAD_INFO # load pointer to thread_info struct
TRACE_IRQS_OFF
l %r3,__LC_PGM_ILC # load program interruption code
la %r8,0x7f
nr %r8,%r3
@ -497,6 +529,7 @@ pgm_per_std:
pgm_no_vtime2:
#endif
l %r9,__LC_THREAD_INFO # load pointer to thread_info struct
TRACE_IRQS_OFF
l %r1,__TI_task(%r9)
mvc __THREAD_per+__PER_atmid(2,%r1),__LC_PER_ATMID
mvc __THREAD_per+__PER_address(4,%r1),__LC_PER_ADDRESS
@ -517,15 +550,13 @@ pgm_svcper:
SAVE_ALL_SYNC __LC_SVC_OLD_PSW,__LC_SAVE_AREA
CREATE_STACK_FRAME __LC_SVC_OLD_PSW,__LC_SAVE_AREA
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
tm SP_PSW+1(%r15),0x01 # interrupting from user ?
bz BASED(pgm_no_vtime3)
UPDATE_VTIME __LC_EXIT_TIMER,__LC_SYNC_ENTER_TIMER,__LC_USER_TIMER
UPDATE_VTIME __LC_LAST_UPDATE_TIMER,__LC_EXIT_TIMER,__LC_SYSTEM_TIMER
mvc __LC_LAST_UPDATE_TIMER(8),__LC_SYNC_ENTER_TIMER
pgm_no_vtime3:
#endif
lh %r7,0x8a # get svc number from lowcore
l %r9,__LC_THREAD_INFO # load pointer to thread_info struct
TRACE_IRQS_OFF
l %r1,__TI_task(%r9)
mvc __THREAD_per+__PER_atmid(2,%r1),__LC_PER_ATMID
mvc __THREAD_per+__PER_address(4,%r1),__LC_PER_ADDRESS
@ -542,7 +573,7 @@ kernel_per:
mvi SP_TRAP+1(%r15),0x28 # set trap indication to pgm check
la %r2,SP_PTREGS(%r15) # address of register-save area
l %r1,BASED(.Lhandle_per) # load adr. of per handler
la %r14,BASED(sysc_leave) # load adr. of system return
la %r14,BASED(sysc_restore)# load adr. of system return
br %r1 # branch to do_single_step
/*
@ -569,26 +600,38 @@ io_no_vtime:
l %r1,BASED(.Ldo_IRQ) # load address of do_IRQ
la %r2,SP_PTREGS(%r15) # address of register-save area
basr %r14,%r1 # branch to standard irq handler
TRACE_IRQS_ON
io_return:
tm SP_PSW+1(%r15),0x01 # returning to user ?
#ifdef CONFIG_PREEMPT
bno BASED(io_preempt) # no -> check for preemptive scheduling
#else
bno BASED(io_leave) # no-> skip resched & signal
bno BASED(io_restore) # no-> skip resched & signal
#endif
tm __TI_flags+3(%r9),_TIF_WORK_INT
bnz BASED(io_work) # there is work to do (signals etc.)
io_restore:
#ifdef CONFIG_TRACE_IRQFLAGS
la %r1,BASED(io_restore_trace_psw)
lpsw 0(%r1)
io_restore_trace:
TRACE_IRQS_CHECK
LOCKDEP_SYS_EXIT
#endif
io_leave:
RESTORE_ALL __LC_RETURN_PSW,0
io_done:
#ifdef CONFIG_TRACE_IRQFLAGS
.align 8
.globl io_restore_trace_psw
io_restore_trace_psw:
.long 0, io_restore_trace + 0x80000000
#endif
#ifdef CONFIG_PREEMPT
io_preempt:
icm %r0,15,__TI_precount(%r9)
bnz BASED(io_leave)
bnz BASED(io_restore)
l %r1,SP_R15(%r15)
s %r1,BASED(.Lc_spsize)
mvc SP_PTREGS(__PT_SIZE,%r1),SP_PTREGS(%r15)
@ -596,12 +639,14 @@ io_preempt:
lr %r15,%r1
io_resume_loop:
tm __TI_flags+3(%r9),_TIF_NEED_RESCHED
bno BASED(io_leave)
bno BASED(io_restore)
mvc __TI_precount(4,%r9),BASED(.Lc_pactive)
TRACE_IRQS_ON
stosm __SF_EMPTY(%r15),0x03 # reenable interrupts
l %r1,BASED(.Lschedule)
basr %r14,%r1 # call schedule
stnsm __SF_EMPTY(%r15),0xfc # disable I/O and ext. interrupts
TRACE_IRQS_OFF
xc __TI_precount(4,%r9),__TI_precount(%r9)
b BASED(io_resume_loop)
#endif
@ -627,40 +672,42 @@ io_work_loop:
bo BASED(io_reschedule)
tm __TI_flags+3(%r9),(_TIF_SIGPENDING | _TIF_RESTORE_SIGMASK)
bnz BASED(io_sigpending)
LOCKDEP_SYS_EXIT
b BASED(io_leave)
b BASED(io_restore)
io_work_done:
#
# _TIF_MCCK_PENDING is set, call handler
#
io_mcck_pending:
TRACE_IRQS_OFF
l %r1,BASED(.Ls390_handle_mcck)
basr %r14,%r1 # TIF bit will be cleared by handler
TRACE_IRQS_ON
b BASED(io_work_loop)
#
# _TIF_NEED_RESCHED is set, call schedule
#
io_reschedule:
TRACE_IRQS_ON
l %r1,BASED(.Lschedule)
stosm __SF_EMPTY(%r15),0x03 # reenable interrupts
basr %r14,%r1 # call scheduler
stnsm __SF_EMPTY(%r15),0xfc # disable I/O and ext. interrupts
TRACE_IRQS_OFF
tm __TI_flags+3(%r9),_TIF_WORK_INT
bz BASED(io_leave) # there is no work to do
bz BASED(io_restore) # there is no work to do
b BASED(io_work_loop)
#
# _TIF_SIGPENDING or _TIF_RESTORE_SIGMASK is set, call do_signal
#
io_sigpending:
TRACE_IRQS_ON
stosm __SF_EMPTY(%r15),0x03 # reenable interrupts
la %r2,SP_PTREGS(%r15) # load pt_regs
l %r1,BASED(.Ldo_signal)
basr %r14,%r1 # call do_signal
stnsm __SF_EMPTY(%r15),0xfc # disable I/O and ext. interrupts
TRACE_IRQS_OFF
b BASED(io_work_loop)
/*
@ -688,7 +735,6 @@ ext_no_vtime:
lh %r3,__LC_EXT_INT_CODE # get interruption code
l %r1,BASED(.Ldo_extint)
basr %r14,%r1
TRACE_IRQS_ON
b BASED(io_return)
__critical_end:
@ -853,15 +899,15 @@ cleanup_table_system_call:
cleanup_table_sysc_return:
.long sysc_return + 0x80000000, sysc_leave + 0x80000000
cleanup_table_sysc_leave:
.long sysc_leave + 0x80000000, sysc_work_loop + 0x80000000
.long sysc_leave + 0x80000000, sysc_done + 0x80000000
cleanup_table_sysc_work_loop:
.long sysc_work_loop + 0x80000000, sysc_reschedule + 0x80000000
.long sysc_work_loop + 0x80000000, sysc_work_done + 0x80000000
cleanup_table_io_return:
.long io_return + 0x80000000, io_leave + 0x80000000
cleanup_table_io_leave:
.long io_leave + 0x80000000, io_done + 0x80000000
cleanup_table_io_work_loop:
.long io_work_loop + 0x80000000, io_mcck_pending + 0x80000000
.long io_work_loop + 0x80000000, io_work_done + 0x80000000
cleanup_critical:
clc 4(4,%r12),BASED(cleanup_table_system_call)
@ -930,8 +976,6 @@ cleanup_system_call:
cleanup_vtime:
clc __LC_RETURN_PSW+4(4),BASED(cleanup_system_call_insn+12)
bhe BASED(cleanup_stime)
tm SP_PSW+1(%r15),0x01 # interrupting from user ?
bz BASED(cleanup_novtime)
UPDATE_VTIME __LC_EXIT_TIMER,__LC_SYNC_ENTER_TIMER,__LC_USER_TIMER
cleanup_stime:
clc __LC_RETURN_PSW+4(4),BASED(cleanup_system_call_insn+16)
@ -939,7 +983,6 @@ cleanup_stime:
UPDATE_VTIME __LC_LAST_UPDATE_TIMER,__LC_EXIT_TIMER,__LC_SYSTEM_TIMER
cleanup_update:
mvc __LC_LAST_UPDATE_TIMER(8),__LC_SYNC_ENTER_TIMER
cleanup_novtime:
#endif
mvc __LC_RETURN_PSW+4(4),BASED(cleanup_table_system_call+4)
la %r12,__LC_RETURN_PSW
@ -978,10 +1021,10 @@ cleanup_sysc_leave:
2: la %r12,__LC_RETURN_PSW
br %r14
cleanup_sysc_leave_insn:
.long sysc_done - 4 + 0x80000000
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
.long sysc_leave + 14 + 0x80000000
.long sysc_done - 8 + 0x80000000
#endif
.long sysc_leave + 10 + 0x80000000
cleanup_io_return:
mvc __LC_RETURN_PSW(4),0(%r12)
@ -1008,10 +1051,10 @@ cleanup_io_leave:
2: la %r12,__LC_RETURN_PSW
br %r14
cleanup_io_leave_insn:
.long io_done - 4 + 0x80000000
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
.long io_leave + 18 + 0x80000000
.long io_done - 8 + 0x80000000
#endif
.long io_leave + 14 + 0x80000000
/*
* Integer constants

106
arch/s390/kernel/entry64.S
View File

@ -67,12 +67,28 @@ _TIF_WORK_INT = (_TIF_SIGPENDING | _TIF_RESTORE_SIGMASK | _TIF_NEED_RESCHED | \
brasl %r14,trace_hardirqs_off
.endm
.macro LOCKDEP_SYS_EXIT
brasl %r14,lockdep_sys_exit
.macro TRACE_IRQS_CHECK
tm SP_PSW(%r15),0x03 # irqs enabled?
jz 0f
brasl %r14,trace_hardirqs_on
j 1f
0: brasl %r14,trace_hardirqs_off
1:
.endm
#else
#define TRACE_IRQS_ON
#define TRACE_IRQS_OFF
#define TRACE_IRQS_CHECK
#endif
#ifdef CONFIG_LOCKDEP
.macro LOCKDEP_SYS_EXIT
tm SP_PSW+1(%r15),0x01 # returning to user ?
jz 0f
brasl %r14,lockdep_sys_exit
0:
.endm
#else
#define LOCKDEP_SYS_EXIT
#endif
@ -222,8 +238,6 @@ sysc_saveall:
llgh %r7,__LC_SVC_INT_CODE # get svc number from lowcore
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
sysc_vtime:
tm SP_PSW+1(%r15),0x01 # interrupting from user ?
jz sysc_do_svc
UPDATE_VTIME __LC_EXIT_TIMER,__LC_SYNC_ENTER_TIMER,__LC_USER_TIMER
sysc_stime:
UPDATE_VTIME __LC_LAST_UPDATE_TIMER,__LC_EXIT_TIMER,__LC_SYSTEM_TIMER
@ -257,19 +271,34 @@ sysc_noemu:
sysc_return:
tm SP_PSW+1(%r15),0x01 # returning to user ?
jno sysc_leave
jno sysc_restore
tm __TI_flags+7(%r9),_TIF_WORK_SVC
jnz sysc_work # there is work to do (signals etc.)
sysc_restore:
#ifdef CONFIG_TRACE_IRQFLAGS
larl %r1,sysc_restore_trace_psw
lpswe 0(%r1)
sysc_restore_trace:
TRACE_IRQS_CHECK
LOCKDEP_SYS_EXIT
#endif
sysc_leave:
RESTORE_ALL __LC_RETURN_PSW,1
sysc_done:
#ifdef CONFIG_TRACE_IRQFLAGS
.align 8
.globl sysc_restore_trace_psw
sysc_restore_trace_psw:
.quad 0, sysc_restore_trace
#endif
#
# recheck if there is more work to do
#
sysc_work_loop:
tm __TI_flags+7(%r9),_TIF_WORK_SVC
jz sysc_leave # there is no work to do
jz sysc_restore # there is no work to do
#
# One of the work bits is on. Find out which one.
#
@ -284,8 +313,8 @@ sysc_work:
jo sysc_restart
tm __TI_flags+7(%r9),_TIF_SINGLE_STEP
jo sysc_singlestep
LOCKDEP_SYS_EXIT
j sysc_leave
j sysc_restore
sysc_work_done:
#
# _TIF_NEED_RESCHED is set, call schedule
@ -445,6 +474,7 @@ pgm_check_handler:
pgm_no_vtime:
#endif
lg %r9,__LC_THREAD_INFO # load pointer to thread_info struct
TRACE_IRQS_OFF
lgf %r3,__LC_PGM_ILC # load program interruption code
lghi %r8,0x7f
ngr %r8,%r3
@ -484,6 +514,7 @@ pgm_per_std:
pgm_no_vtime2:
#endif
lg %r9,__LC_THREAD_INFO # load pointer to thread_info struct
TRACE_IRQS_OFF
lg %r1,__TI_task(%r9)
tm SP_PSW+1(%r15),0x01 # kernel per event ?
jz kernel_per
@ -504,12 +535,9 @@ pgm_svcper:
SAVE_ALL_SYNC __LC_SVC_OLD_PSW,__LC_SAVE_AREA
CREATE_STACK_FRAME __LC_SVC_OLD_PSW,__LC_SAVE_AREA
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
tm SP_PSW+1(%r15),0x01 # interrupting from user ?
jz pgm_no_vtime3
UPDATE_VTIME __LC_EXIT_TIMER,__LC_SYNC_ENTER_TIMER,__LC_USER_TIMER
UPDATE_VTIME __LC_LAST_UPDATE_TIMER,__LC_EXIT_TIMER,__LC_SYSTEM_TIMER
mvc __LC_LAST_UPDATE_TIMER(8),__LC_SYNC_ENTER_TIMER
pgm_no_vtime3:
#endif
llgh %r7,__LC_SVC_INT_CODE # get svc number from lowcore
lg %r9,__LC_THREAD_INFO # load pointer to thread_info struct
@ -529,7 +557,7 @@ kernel_per:
lhi %r0,__LC_PGM_OLD_PSW
sth %r0,SP_TRAP(%r15) # set trap indication to pgm check
la %r2,SP_PTREGS(%r15) # address of register-save area
larl %r14,sysc_leave # load adr. of system ret, no work
larl %r14,sysc_restore # load adr. of system ret, no work
jg do_single_step # branch to do_single_step
/*
@ -554,26 +582,38 @@ io_no_vtime:
TRACE_IRQS_OFF
la %r2,SP_PTREGS(%r15) # address of register-save area
brasl %r14,do_IRQ # call standard irq handler
TRACE_IRQS_ON
io_return:
tm SP_PSW+1(%r15),0x01 # returning to user ?
#ifdef CONFIG_PREEMPT
jno io_preempt # no -> check for preemptive scheduling
#else
jno io_leave # no-> skip resched & signal
jno io_restore # no-> skip resched & signal
#endif
tm __TI_flags+7(%r9),_TIF_WORK_INT
jnz io_work # there is work to do (signals etc.)
io_restore:
#ifdef CONFIG_TRACE_IRQFLAGS
larl %r1,io_restore_trace_psw
lpswe 0(%r1)
io_restore_trace:
TRACE_IRQS_CHECK
LOCKDEP_SYS_EXIT
#endif
io_leave:
RESTORE_ALL __LC_RETURN_PSW,0
io_done:
#ifdef CONFIG_TRACE_IRQFLAGS
.align 8
.globl io_restore_trace_psw
io_restore_trace_psw:
.quad 0, io_restore_trace
#endif
#ifdef CONFIG_PREEMPT
io_preempt:
icm %r0,15,__TI_precount(%r9)
jnz io_leave
jnz io_restore
# switch to kernel stack
lg %r1,SP_R15(%r15)
aghi %r1,-SP_SIZE
@ -582,12 +622,14 @@ io_preempt:
lgr %r15,%r1
io_resume_loop:
tm __TI_flags+7(%r9),_TIF_NEED_RESCHED
jno io_leave
jno io_restore
larl %r1,.Lc_pactive
mvc __TI_precount(4,%r9),0(%r1)
TRACE_IRQS_ON
stosm __SF_EMPTY(%r15),0x03 # reenable interrupts
brasl %r14,schedule # call schedule
stnsm __SF_EMPTY(%r15),0xfc # disable I/O and ext. interrupts
TRACE_IRQS_OFF
xc __TI_precount(4,%r9),__TI_precount(%r9)
j io_resume_loop
#endif
@ -613,37 +655,39 @@ io_work_loop:
jo io_reschedule
tm __TI_flags+7(%r9),(_TIF_SIGPENDING | _TIF_RESTORE_SIGMASK)
jnz io_sigpending
LOCKDEP_SYS_EXIT
j io_leave
j io_restore
io_work_done:
#
# _TIF_MCCK_PENDING is set, call handler
#
io_mcck_pending:
TRACE_IRQS_OFF
brasl %r14,s390_handle_mcck # TIF bit will be cleared by handler
TRACE_IRQS_ON
j io_work_loop
#
# _TIF_NEED_RESCHED is set, call schedule
#
io_reschedule:
TRACE_IRQS_ON
stosm __SF_EMPTY(%r15),0x03 # reenable interrupts
brasl %r14,schedule # call scheduler
stnsm __SF_EMPTY(%r15),0xfc # disable I/O and ext. interrupts
TRACE_IRQS_OFF
tm __TI_flags+7(%r9),_TIF_WORK_INT
jz io_leave # there is no work to do
jz io_restore # there is no work to do
j io_work_loop
#
# _TIF_SIGPENDING or _TIF_RESTORE_SIGMASK is set, call do_signal
#
io_sigpending:
TRACE_IRQS_ON
stosm __SF_EMPTY(%r15),0x03 # reenable interrupts
la %r2,SP_PTREGS(%r15) # load pt_regs
brasl %r14,do_signal # call do_signal
stnsm __SF_EMPTY(%r15),0xfc # disable I/O and ext. interrupts
TRACE_IRQS_OFF
j io_work_loop
/*
@ -669,7 +713,6 @@ ext_no_vtime:
la %r2,SP_PTREGS(%r15) # address of register-save area
llgh %r3,__LC_EXT_INT_CODE # get interruption code
brasl %r14,do_extint
TRACE_IRQS_ON
j io_return
__critical_end:
@ -824,15 +867,15 @@ cleanup_table_system_call:
cleanup_table_sysc_return:
.quad sysc_return, sysc_leave
cleanup_table_sysc_leave:
.quad sysc_leave, sysc_work_loop
.quad sysc_leave, sysc_done
cleanup_table_sysc_work_loop:
.quad sysc_work_loop, sysc_reschedule
.quad sysc_work_loop, sysc_work_done
cleanup_table_io_return:
.quad io_return, io_leave
cleanup_table_io_leave:
.quad io_leave, io_done
cleanup_table_io_work_loop:
.quad io_work_loop, io_mcck_pending
.quad io_work_loop, io_work_done
cleanup_critical:
clc 8(8,%r12),BASED(cleanup_table_system_call)
@ -901,8 +944,6 @@ cleanup_system_call:
cleanup_vtime:
clc __LC_RETURN_PSW+8(8),BASED(cleanup_system_call_insn+24)
jhe cleanup_stime
tm SP_PSW+1(%r15),0x01 # interrupting from user ?
jz cleanup_novtime
UPDATE_VTIME __LC_EXIT_TIMER,__LC_SYNC_ENTER_TIMER,__LC_USER_TIMER
cleanup_stime:
clc __LC_RETURN_PSW+8(8),BASED(cleanup_system_call_insn+32)
@ -910,7 +951,6 @@ cleanup_stime:
UPDATE_VTIME __LC_LAST_UPDATE_TIMER,__LC_EXIT_TIMER,__LC_SYSTEM_TIMER
cleanup_update:
mvc __LC_LAST_UPDATE_TIMER(8),__LC_SYNC_ENTER_TIMER
cleanup_novtime:
#endif
mvc __LC_RETURN_PSW+8(8),BASED(cleanup_table_system_call+8)
la %r12,__LC_RETURN_PSW
@ -949,10 +989,10 @@ cleanup_sysc_leave:
2: la %r12,__LC_RETURN_PSW
br %r14
cleanup_sysc_leave_insn:
.quad sysc_done - 4
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
.quad sysc_leave + 16
.quad sysc_done - 8
#endif
.quad sysc_leave + 12
cleanup_io_return:
mvc __LC_RETURN_PSW(8),0(%r12)
@ -979,10 +1019,10 @@ cleanup_io_leave:
2: la %r12,__LC_RETURN_PSW
br %r14
cleanup_io_leave_insn:
.quad io_done - 4
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
.quad io_leave + 20
.quad io_done - 8
#endif
.quad io_leave + 16
/*
* Integer constants

4
arch/s390/kernel/setup.c
View File

@ -492,6 +492,10 @@ static void setup_addressing_mode(void)
printk("S390 address spaces switched, ");
set_amode_and_uaccess(PSW_ASC_PRIMARY, PSW32_ASC_PRIMARY);
}
#ifdef CONFIG_TRACE_IRQFLAGS
sysc_restore_trace_psw.mask = psw_kernel_bits & ~PSW_MASK_MCHECK;
io_restore_trace_psw.mask = psw_kernel_bits & ~PSW_MASK_MCHECK;
#endif
}
static void __init

5
include/asm-s390/system.h
View File

@ -388,6 +388,11 @@ extern void (*_machine_power_off)(void);
#define arch_align_stack(x) (x)
#ifdef CONFIG_TRACE_IRQFLAGS
extern psw_t sysc_restore_trace_psw;
extern psw_t io_restore_trace_psw;
#endif
#endif /* __KERNEL__ */
#endif