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Diffstat (limited to 'arch/s390/kernel/entry64.S')
-rw-r--r--arch/s390/kernel/entry64.S82
1 files changed, 42 insertions, 40 deletions
diff --git a/arch/s390/kernel/entry64.S b/arch/s390/kernel/entry64.S
index 3c34753de6ad..f2e674c702e1 100644
--- a/arch/s390/kernel/entry64.S
+++ b/arch/s390/kernel/entry64.S
@@ -42,13 +42,11 @@ STACK_SHIFT = PAGE_SHIFT + THREAD_ORDER
STACK_SIZE = 1 << STACK_SHIFT
STACK_INIT = STACK_SIZE - STACK_FRAME_OVERHEAD - __PT_SIZE
-_TIF_WORK_SVC = (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | _TIF_NEED_RESCHED | \
- _TIF_MCCK_PENDING | _TIF_PER_TRAP | _TIF_ASCE)
-_TIF_WORK_INT = (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | _TIF_NEED_RESCHED | \
- _TIF_MCCK_PENDING | _TIF_ASCE)
-_TIF_TRACE = (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | _TIF_SECCOMP | \
- _TIF_SYSCALL_TRACEPOINT)
-_TIF_TRANSFER = (_TIF_MCCK_PENDING | _TIF_TLB_WAIT)
+_TIF_WORK = (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | _TIF_NEED_RESCHED)
+_TIF_TRACE = (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | _TIF_SECCOMP | \
+ _TIF_SYSCALL_TRACEPOINT)
+_CIF_WORK = (_CIF_MCCK_PENDING | _CIF_ASCE)
+_PIF_WORK = (_PIF_PER_TRAP)
#define BASED(name) name-system_call(%r13)
@@ -190,13 +188,7 @@ ENTRY(__switch_to)
lctl %c4,%c4,__TASK_pid(%r3) # load pid to control reg. 4
mvc __LC_CURRENT_PID+4(4,%r0),__TASK_pid(%r3) # store pid of next
lg %r15,__THREAD_ksp(%r3) # load kernel stack of next
- llill %r6,_TIF_TRANSFER # transfer TIF bits
- ng %r6,__TI_flags(%r4) # isolate TIF bits
- jz 0f
- og %r6,__TI_flags(%r5) # set TIF bits of next
- stg %r6,__TI_flags(%r5)
- ni __TI_flags+7(%r4),255-_TIF_TRANSFER # clear TIF bits of prev
-0: lmg %r6,%r15,__SF_GPRS(%r15) # load gprs of next task
+ lmg %r6,%r15,__SF_GPRS(%r15) # load gprs of next task
br %r14
__critical_start:
@@ -211,6 +203,7 @@ sysc_stmg:
stmg %r8,%r15,__LC_SAVE_AREA_SYNC
lg %r10,__LC_LAST_BREAK
lg %r12,__LC_THREAD_INFO
+ lghi %r14,_PIF_SYSCALL
sysc_per:
lg %r15,__LC_KERNEL_STACK
la %r11,STACK_FRAME_OVERHEAD(%r15) # pointer to pt_regs
@@ -221,8 +214,8 @@ sysc_vtime:
mvc __PT_R8(64,%r11),__LC_SAVE_AREA_SYNC
mvc __PT_PSW(16,%r11),__LC_SVC_OLD_PSW
mvc __PT_INT_CODE(4,%r11),__LC_SVC_ILC
+ stg %r14,__PT_FLAGS(%r11)
sysc_do_svc:
- oi __TI_flags+7(%r12),_TIF_SYSCALL
lg %r10,__TI_sysc_table(%r12) # address of system call table
llgh %r8,__PT_INT_CODE+2(%r11)
slag %r8,%r8,2 # shift and test for svc 0
@@ -238,7 +231,7 @@ sysc_nr_ok:
stg %r2,__PT_ORIG_GPR2(%r11)
stg %r7,STACK_FRAME_OVERHEAD(%r15)
lgf %r9,0(%r8,%r10) # get system call add.
- tm __TI_flags+6(%r12),_TIF_TRACE >> 8
+ tm __TI_flags+7(%r12),_TIF_TRACE
jnz sysc_tracesys
basr %r14,%r9 # call sys_xxxx
stg %r2,__PT_R2(%r11) # store return value
@@ -248,9 +241,12 @@ sysc_return:
sysc_tif:
tm __PT_PSW+1(%r11),0x01 # returning to user ?
jno sysc_restore
- tm __TI_flags+7(%r12),_TIF_WORK_SVC
+ tm __PT_FLAGS+7(%r11),_PIF_WORK
+ jnz sysc_work
+ tm __TI_flags+7(%r12),_TIF_WORK
jnz sysc_work # check for work
- ni __TI_flags+7(%r12),255-_TIF_SYSCALL
+ tm __LC_CPU_FLAGS+7,_CIF_WORK
+ jnz sysc_work
sysc_restore:
lg %r14,__LC_VDSO_PER_CPU
lmg %r0,%r10,__PT_R0(%r11)
@@ -265,17 +261,17 @@ sysc_done:
# One of the work bits is on. Find out which one.
#
sysc_work:
- tm __TI_flags+7(%r12),_TIF_MCCK_PENDING
+ tm __LC_CPU_FLAGS+7,_CIF_MCCK_PENDING
jo sysc_mcck_pending
tm __TI_flags+7(%r12),_TIF_NEED_RESCHED
jo sysc_reschedule
- tm __TI_flags+7(%r12),_TIF_PER_TRAP
+ tm __PT_FLAGS+7(%r11),_PIF_PER_TRAP
jo sysc_singlestep
tm __TI_flags+7(%r12),_TIF_SIGPENDING
jo sysc_sigpending
tm __TI_flags+7(%r12),_TIF_NOTIFY_RESUME
jo sysc_notify_resume
- tm __TI_flags+7(%r12),_TIF_ASCE
+ tm __LC_CPU_FLAGS+7,_CIF_ASCE
jo sysc_uaccess
j sysc_return # beware of critical section cleanup
@@ -287,17 +283,17 @@ sysc_reschedule:
jg schedule
#
-# _TIF_MCCK_PENDING is set, call handler
+# _CIF_MCCK_PENDING is set, call handler
#
sysc_mcck_pending:
larl %r14,sysc_return
jg s390_handle_mcck # TIF bit will be cleared by handler
#
-# _TIF_ASCE is set, load user space asce
+# _CIF_ASCE is set, load user space asce
#
sysc_uaccess:
- ni __TI_flags+7(%r12),255-_TIF_ASCE
+ ni __LC_CPU_FLAGS+7,255-_CIF_ASCE
lctlg %c1,%c1,__LC_USER_ASCE # load primary asce
j sysc_return
@@ -307,7 +303,7 @@ sysc_uaccess:
sysc_sigpending:
lgr %r2,%r11 # pass pointer to pt_regs
brasl %r14,do_signal
- tm __TI_flags+7(%r12),_TIF_SYSCALL
+ tm __PT_FLAGS+7(%r11),_PIF_SYSCALL
jno sysc_return
lmg %r2,%r7,__PT_R2(%r11) # load svc arguments
lg %r10,__TI_sysc_table(%r12) # address of system call table
@@ -327,10 +323,10 @@ sysc_notify_resume:
jg do_notify_resume
#
-# _TIF_PER_TRAP is set, call do_per_trap
+# _PIF_PER_TRAP is set, call do_per_trap
#
sysc_singlestep:
- ni __TI_flags+7(%r12),255-_TIF_PER_TRAP
+ ni __PT_FLAGS+7(%r11),255-_PIF_PER_TRAP
lgr %r2,%r11 # pass pointer to pt_regs
larl %r14,sysc_return
jg do_per_trap
@@ -357,7 +353,7 @@ sysc_tracego:
basr %r14,%r9 # call sys_xxx
stg %r2,__PT_R2(%r11) # store return value
sysc_tracenogo:
- tm __TI_flags+6(%r12),_TIF_TRACE >> 8
+ tm __TI_flags+7(%r12),_TIF_TRACE
jz sysc_return
lgr %r2,%r11 # pass pointer to pt_regs
larl %r14,sysc_return
@@ -416,12 +412,13 @@ ENTRY(pgm_check_handler)
stmg %r8,%r9,__PT_PSW(%r11)
mvc __PT_INT_CODE(4,%r11),__LC_PGM_ILC
mvc __PT_INT_PARM_LONG(8,%r11),__LC_TRANS_EXC_CODE
+ xc __PT_FLAGS(8,%r11),__PT_FLAGS(%r11)
stg %r10,__PT_ARGS(%r11)
tm __LC_PGM_ILC+3,0x80 # check for per exception
jz 0f
tmhh %r8,0x0001 # kernel per event ?
jz pgm_kprobe
- oi __TI_flags+7(%r12),_TIF_PER_TRAP
+ oi __PT_FLAGS+7(%r11),_PIF_PER_TRAP
mvc __THREAD_per_address(8,%r14),__LC_PER_ADDRESS
mvc __THREAD_per_cause(2,%r14),__LC_PER_CODE
mvc __THREAD_per_paid(1,%r14),__LC_PER_ACCESS_ID
@@ -451,10 +448,10 @@ pgm_kprobe:
# single stepped system call
#
pgm_svcper:
- oi __TI_flags+7(%r12),_TIF_PER_TRAP
mvc __LC_RETURN_PSW(8),__LC_SVC_NEW_PSW
larl %r14,sysc_per
stg %r14,__LC_RETURN_PSW+8
+ lghi %r14,_PIF_SYSCALL | _PIF_PER_TRAP
lpswe __LC_RETURN_PSW # branch to sysc_per and enable irqs
/*
@@ -479,6 +476,7 @@ io_skip:
mvc __PT_R8(64,%r11),__LC_SAVE_AREA_ASYNC
stmg %r8,%r9,__PT_PSW(%r11)
mvc __PT_INT_CODE(12,%r11),__LC_SUBCHANNEL_ID
+ xc __PT_FLAGS(8,%r11),__PT_FLAGS(%r11)
TRACE_IRQS_OFF
xc __SF_BACKCHAIN(8,%r15),__SF_BACKCHAIN(%r15)
io_loop:
@@ -499,8 +497,10 @@ io_return:
LOCKDEP_SYS_EXIT
TRACE_IRQS_ON
io_tif:
- tm __TI_flags+7(%r12),_TIF_WORK_INT
+ tm __TI_flags+7(%r12),_TIF_WORK
jnz io_work # there is work to do (signals etc.)
+ tm __LC_CPU_FLAGS+7,_CIF_WORK
+ jnz io_work
io_restore:
lg %r14,__LC_VDSO_PER_CPU
lmg %r0,%r10,__PT_R0(%r11)
@@ -513,7 +513,7 @@ io_done:
#
# There is work todo, find out in which context we have been interrupted:
-# 1) if we return to user space we can do all _TIF_WORK_INT work
+# 1) if we return to user space we can do all _TIF_WORK work
# 2) if we return to kernel code and kvm is enabled check if we need to
# modify the psw to leave SIE
# 3) if we return to kernel code and preemptive scheduling is enabled check
@@ -557,11 +557,9 @@ io_work_user:
#
# One of the work bits is on. Find out which one.
-# Checked are: _TIF_SIGPENDING, _TIF_NOTIFY_RESUME, _TIF_NEED_RESCHED
-# and _TIF_MCCK_PENDING
#
io_work_tif:
- tm __TI_flags+7(%r12),_TIF_MCCK_PENDING
+ tm __LC_CPU_FLAGS+7,_CIF_MCCK_PENDING
jo io_mcck_pending
tm __TI_flags+7(%r12),_TIF_NEED_RESCHED
jo io_reschedule
@@ -569,12 +567,12 @@ io_work_tif:
jo io_sigpending
tm __TI_flags+7(%r12),_TIF_NOTIFY_RESUME
jo io_notify_resume
- tm __TI_flags+7(%r12),_TIF_ASCE
+ tm __LC_CPU_FLAGS+7,_CIF_ASCE
jo io_uaccess
j io_return # beware of critical section cleanup
#
-# _TIF_MCCK_PENDING is set, call handler
+# _CIF_MCCK_PENDING is set, call handler
#
io_mcck_pending:
# TRACE_IRQS_ON already done at io_return
@@ -583,10 +581,10 @@ io_mcck_pending:
j io_return
#
-# _TIF_ASCE is set, load user space asce
+# _CIF_ASCE is set, load user space asce
#
io_uaccess:
- ni __TI_flags+7(%r12),255-_TIF_ASCE
+ ni __LC_CPU_FLAGS+7,255-_CIF_ASCE
lctlg %c1,%c1,__LC_USER_ASCE # load primary asce
j io_return
@@ -650,6 +648,7 @@ ext_skip:
mvc __PT_INT_CODE(4,%r11),__LC_EXT_CPU_ADDR
mvc __PT_INT_PARM(4,%r11),__LC_EXT_PARAMS
mvc __PT_INT_PARM_LONG(8,%r11),0(%r1)
+ xc __PT_FLAGS(8,%r11),__PT_FLAGS(%r11)
TRACE_IRQS_OFF
xc __SF_BACKCHAIN(8,%r15),__SF_BACKCHAIN(%r15)
lgr %r2,%r11 # pass pointer to pt_regs
@@ -716,6 +715,7 @@ mcck_skip:
stmg %r0,%r7,__PT_R0(%r11)
mvc __PT_R8(64,%r11),0(%r14)
stmg %r8,%r9,__PT_PSW(%r11)
+ xc __PT_FLAGS(8,%r11),__PT_FLAGS(%r11)
xc __SF_BACKCHAIN(8,%r15),__SF_BACKCHAIN(%r15)
lgr %r2,%r11 # pass pointer to pt_regs
brasl %r14,s390_do_machine_check
@@ -727,7 +727,7 @@ mcck_skip:
la %r11,STACK_FRAME_OVERHEAD(%r1)
lgr %r15,%r1
ssm __LC_PGM_NEW_PSW # turn dat on, keep irqs off
- tm __TI_flags+7(%r12),_TIF_MCCK_PENDING
+ tm __LC_CPU_FLAGS+7,_CIF_MCCK_PENDING
jno mcck_return
TRACE_IRQS_OFF
brasl %r14,s390_handle_mcck
@@ -884,6 +884,8 @@ cleanup_system_call:
stmg %r0,%r7,__PT_R0(%r9)
mvc __PT_PSW(16,%r9),__LC_SVC_OLD_PSW
mvc __PT_INT_CODE(4,%r9),__LC_SVC_ILC
+ xc __PT_FLAGS(8,%r9),__PT_FLAGS(%r9)
+ mvi __PT_FLAGS+7(%r9),_PIF_SYSCALL
# setup saved register r15
stg %r15,56(%r11) # r15 stack pointer
# set new psw address and exit
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-05 04:46:30 +0300