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-rw-r--r--arch/s390/kernel/entry.S1005
1 files changed, 549 insertions, 456 deletions
diff --git a/arch/s390/kernel/entry.S b/arch/s390/kernel/entry.S
index 398329b2b518..99b44acbfcc7 100644
--- a/arch/s390/kernel/entry.S
+++ b/arch/s390/kernel/entry.S
@@ -22,27 +22,28 @@
#include <asm/irq.h>
__PT_R0 = __PT_GPRS
-__PT_R1 = __PT_GPRS + 4
-__PT_R2 = __PT_GPRS + 8
-__PT_R3 = __PT_GPRS + 12
-__PT_R4 = __PT_GPRS + 16
-__PT_R5 = __PT_GPRS + 20
-__PT_R6 = __PT_GPRS + 24
-__PT_R7 = __PT_GPRS + 28
-__PT_R8 = __PT_GPRS + 32
-__PT_R9 = __PT_GPRS + 36
-__PT_R10 = __PT_GPRS + 40
-__PT_R11 = __PT_GPRS + 44
-__PT_R12 = __PT_GPRS + 48
-__PT_R13 = __PT_GPRS + 524
-__PT_R14 = __PT_GPRS + 56
-__PT_R15 = __PT_GPRS + 60
+__PT_R1 = __PT_GPRS + 8
+__PT_R2 = __PT_GPRS + 16
+__PT_R3 = __PT_GPRS + 24
+__PT_R4 = __PT_GPRS + 32
+__PT_R5 = __PT_GPRS + 40
+__PT_R6 = __PT_GPRS + 48
+__PT_R7 = __PT_GPRS + 56
+__PT_R8 = __PT_GPRS + 64
+__PT_R9 = __PT_GPRS + 72
+__PT_R10 = __PT_GPRS + 80
+__PT_R11 = __PT_GPRS + 88
+__PT_R12 = __PT_GPRS + 96
+__PT_R13 = __PT_GPRS + 104
+__PT_R14 = __PT_GPRS + 112
+__PT_R15 = __PT_GPRS + 120
STACK_SHIFT = PAGE_SHIFT + THREAD_ORDER
STACK_SIZE = 1 << STACK_SHIFT
-STACK_INIT = STACK_SIZE - STACK_FRAME_OVERHEAD - __PT_SIZE
+STACK_INIT = STACK_SIZE - STACK_FRAME_OVERHEAD - __PT_SIZE
-_TIF_WORK = (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | _TIF_NEED_RESCHED)
+_TIF_WORK = (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | _TIF_NEED_RESCHED | \
+ _TIF_UPROBE)
_TIF_TRACE = (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | _TIF_SECCOMP | \
_TIF_SYSCALL_TRACEPOINT)
_CIF_WORK = (_CIF_MCCK_PENDING | _CIF_ASCE)
@@ -53,16 +54,14 @@ _PIF_WORK = (_PIF_PER_TRAP)
.macro TRACE_IRQS_ON
#ifdef CONFIG_TRACE_IRQFLAGS
basr %r2,%r0
- l %r1,BASED(.Lc_hardirqs_on)
- basr %r14,%r1 # call trace_hardirqs_on_caller
+ brasl %r14,trace_hardirqs_on_caller
#endif
.endm
.macro TRACE_IRQS_OFF
#ifdef CONFIG_TRACE_IRQFLAGS
basr %r2,%r0
- l %r1,BASED(.Lc_hardirqs_off)
- basr %r14,%r1 # call trace_hardirqs_off_caller
+ brasl %r14,trace_hardirqs_off_caller
#endif
.endm
@@ -70,73 +69,104 @@ _PIF_WORK = (_PIF_PER_TRAP)
#ifdef CONFIG_LOCKDEP
tm __PT_PSW+1(%r11),0x01 # returning to user ?
jz .+10
- l %r1,BASED(.Lc_lockdep_sys_exit)
- basr %r14,%r1 # call lockdep_sys_exit
+ brasl %r14,lockdep_sys_exit
+#endif
+ .endm
+
+ .macro LPP newpp
+#if IS_ENABLED(CONFIG_KVM)
+ tm __LC_MACHINE_FLAGS+6,0x20 # MACHINE_FLAG_LPP
+ jz .+8
+ .insn s,0xb2800000,\newpp
+#endif
+ .endm
+
+ .macro HANDLE_SIE_INTERCEPT scratch,reason
+#if IS_ENABLED(CONFIG_KVM)
+ tmhh %r8,0x0001 # interrupting from user ?
+ jnz .+62
+ lgr \scratch,%r9
+ slg \scratch,BASED(.Lsie_critical)
+ clg \scratch,BASED(.Lsie_critical_length)
+ .if \reason==1
+ # Some program interrupts are suppressing (e.g. protection).
+ # We must also check the instruction after SIE in that case.
+ # do_protection_exception will rewind to .Lrewind_pad
+ jh .+42
+ .else
+ jhe .+42
+ .endif
+ lg %r14,__SF_EMPTY(%r15) # get control block pointer
+ LPP __SF_EMPTY+16(%r15) # set host id
+ ni __SIE_PROG0C+3(%r14),0xfe # no longer in SIE
+ lctlg %c1,%c1,__LC_USER_ASCE # load primary asce
+ larl %r9,sie_exit # skip forward to sie_exit
+ mvi __SF_EMPTY+31(%r15),\reason # set exit reason
#endif
.endm
.macro CHECK_STACK stacksize,savearea
#ifdef CONFIG_CHECK_STACK
tml %r15,\stacksize - CONFIG_STACK_GUARD
- la %r14,\savearea
+ lghi %r14,\savearea
jz stack_overflow
#endif
.endm
.macro SWITCH_ASYNC savearea,stack,shift
- tmh %r8,0x0001 # interrupting from user ?
+ tmhh %r8,0x0001 # interrupting from user ?
jnz 1f
- lr %r14,%r9
- sl %r14,BASED(.Lc_critical_start)
- cl %r14,BASED(.Lc_critical_length)
+ lgr %r14,%r9
+ slg %r14,BASED(.Lcritical_start)
+ clg %r14,BASED(.Lcritical_length)
jhe 0f
- la %r11,\savearea # inside critical section, do cleanup
- bras %r14,cleanup_critical
- tmh %r8,0x0001 # retest problem state after cleanup
+ lghi %r11,\savearea # inside critical section, do cleanup
+ brasl %r14,cleanup_critical
+ tmhh %r8,0x0001 # retest problem state after cleanup
jnz 1f
-0: l %r14,\stack # are we already on the target stack?
- slr %r14,%r15
- sra %r14,\shift
+0: lg %r14,\stack # are we already on the target stack?
+ slgr %r14,%r15
+ srag %r14,%r14,\shift
jnz 1f
CHECK_STACK 1<<\shift,\savearea
- ahi %r15,-(STACK_FRAME_OVERHEAD + __PT_SIZE)
+ aghi %r15,-(STACK_FRAME_OVERHEAD + __PT_SIZE)
j 2f
-1: l %r15,\stack # load target stack
+1: lg %r15,\stack # load target stack
2: la %r11,STACK_FRAME_OVERHEAD(%r15)
.endm
- .macro ADD64 high,low,timer
- al \high,\timer
- al \low,4+\timer
- brc 12,.+8
- ahi \high,1
- .endm
-
- .macro SUB64 high,low,timer
- sl \high,\timer
- sl \low,4+\timer
- brc 3,.+8
- ahi \high,-1
+ .macro UPDATE_VTIME scratch,enter_timer
+ lg \scratch,__LC_EXIT_TIMER
+ slg \scratch,\enter_timer
+ alg \scratch,__LC_USER_TIMER
+ stg \scratch,__LC_USER_TIMER
+ lg \scratch,__LC_LAST_UPDATE_TIMER
+ slg \scratch,__LC_EXIT_TIMER
+ alg \scratch,__LC_SYSTEM_TIMER
+ stg \scratch,__LC_SYSTEM_TIMER
+ mvc __LC_LAST_UPDATE_TIMER(8),\enter_timer
.endm
- .macro UPDATE_VTIME high,low,enter_timer
- lm \high,\low,__LC_EXIT_TIMER
- SUB64 \high,\low,\enter_timer
- ADD64 \high,\low,__LC_USER_TIMER
- stm \high,\low,__LC_USER_TIMER
- lm \high,\low,__LC_LAST_UPDATE_TIMER
- SUB64 \high,\low,__LC_EXIT_TIMER
- ADD64 \high,\low,__LC_SYSTEM_TIMER
- stm \high,\low,__LC_SYSTEM_TIMER
- mvc __LC_LAST_UPDATE_TIMER(8),\enter_timer
+ .macro LAST_BREAK scratch
+ srag \scratch,%r10,23
+ jz .+10
+ stg %r10,__TI_last_break(%r12)
.endm
.macro REENABLE_IRQS
- st %r8,__LC_RETURN_PSW
+ stg %r8,__LC_RETURN_PSW
ni __LC_RETURN_PSW,0xbf
ssm __LC_RETURN_PSW
.endm
+ .macro STCK savearea
+#ifdef CONFIG_HAVE_MARCH_Z9_109_FEATURES
+ .insn s,0xb27c0000,\savearea # store clock fast
+#else
+ .insn s,0xb2050000,\savearea # store clock
+#endif
+ .endm
+
.section .kprobes.text, "ax"
/*
@@ -147,19 +177,19 @@ _PIF_WORK = (_PIF_PER_TRAP)
* gpr2 = prev
*/
ENTRY(__switch_to)
- stm %r6,%r15,__SF_GPRS(%r15) # store gprs of prev task
- st %r15,__THREAD_ksp(%r2) # store kernel stack of prev
- l %r4,__THREAD_info(%r2) # get thread_info of prev
- l %r5,__THREAD_info(%r3) # get thread_info of next
- lr %r15,%r5
- ahi %r15,STACK_INIT # end of kernel stack of next
- st %r3,__LC_CURRENT # store task struct of next
- st %r5,__LC_THREAD_INFO # store thread info of next
- st %r15,__LC_KERNEL_STACK # store end of kernel stack
+ stmg %r6,%r15,__SF_GPRS(%r15) # store gprs of prev task
+ stg %r15,__THREAD_ksp(%r2) # store kernel stack of prev
+ lg %r4,__THREAD_info(%r2) # get thread_info of prev
+ lg %r5,__THREAD_info(%r3) # get thread_info of next
+ lgr %r15,%r5
+ aghi %r15,STACK_INIT # end of kernel stack of next
+ stg %r3,__LC_CURRENT # store task struct of next
+ stg %r5,__LC_THREAD_INFO # store thread info of next
+ stg %r15,__LC_KERNEL_STACK # store end of kernel stack
lctl %c4,%c4,__TASK_pid(%r3) # load pid to control reg. 4
- mvc __LC_CURRENT_PID(4,%r0),__TASK_pid(%r3) # store pid of next
- l %r15,__THREAD_ksp(%r3) # load kernel stack of next
- lm %r6,%r15,__SF_GPRS(%r15) # load gprs of next task
+ mvc __LC_CURRENT_PID+4(4,%r0),__TASK_pid(%r3) # store pid of next
+ lg %r15,__THREAD_ksp(%r3) # load kernel stack of next
+ lmg %r6,%r15,__SF_GPRS(%r15) # load gprs of next task
br %r14
.L__critical_start:
@@ -170,75 +200,83 @@ ENTRY(__switch_to)
ENTRY(system_call)
stpt __LC_SYNC_ENTER_TIMER
-.Lsysc_stm:
- stm %r8,%r15,__LC_SAVE_AREA_SYNC
- l %r12,__LC_THREAD_INFO
- l %r13,__LC_SVC_NEW_PSW+4
- lhi %r14,_PIF_SYSCALL
+.Lsysc_stmg:
+ stmg %r8,%r15,__LC_SAVE_AREA_SYNC
+ lg %r10,__LC_LAST_BREAK
+ lg %r12,__LC_THREAD_INFO
+ lghi %r14,_PIF_SYSCALL
.Lsysc_per:
- l %r15,__LC_KERNEL_STACK
+ lg %r15,__LC_KERNEL_STACK
la %r11,STACK_FRAME_OVERHEAD(%r15) # pointer to pt_regs
.Lsysc_vtime:
- UPDATE_VTIME %r8,%r9,__LC_SYNC_ENTER_TIMER
- stm %r0,%r7,__PT_R0(%r11)
- mvc __PT_R8(32,%r11),__LC_SAVE_AREA_SYNC
- mvc __PT_PSW(8,%r11),__LC_SVC_OLD_PSW
+ UPDATE_VTIME %r13,__LC_SYNC_ENTER_TIMER
+ LAST_BREAK %r13
+ stmg %r0,%r7,__PT_R0(%r11)
+ 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
- st %r14,__PT_FLAGS(%r11)
+ stg %r14,__PT_FLAGS(%r11)
.Lsysc_do_svc:
- l %r10,__TI_sysc_table(%r12) # 31 bit system call table
- lh %r8,__PT_INT_CODE+2(%r11)
- sla %r8,2 # shift and test for svc0
+ 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
jnz .Lsysc_nr_ok
# svc 0: system call number in %r1
- cl %r1,BASED(.Lnr_syscalls)
+ llgfr %r1,%r1 # clear high word in r1
+ cghi %r1,NR_syscalls
jnl .Lsysc_nr_ok
sth %r1,__PT_INT_CODE+2(%r11)
- lr %r8,%r1
- sla %r8,2
+ slag %r8,%r1,2
.Lsysc_nr_ok:
- xc __SF_BACKCHAIN(4,%r15),__SF_BACKCHAIN(%r15)
- st %r2,__PT_ORIG_GPR2(%r11)
- st %r7,STACK_FRAME_OVERHEAD(%r15)
- l %r9,0(%r8,%r10) # get system call addr.
- tm __TI_flags+3(%r12),_TIF_TRACE
+ xc __SF_BACKCHAIN(8,%r15),__SF_BACKCHAIN(%r15)
+ stg %r2,__PT_ORIG_GPR2(%r11)
+ stg %r7,STACK_FRAME_OVERHEAD(%r15)
+ lgf %r9,0(%r8,%r10) # get system call add.
+ tm __TI_flags+7(%r12),_TIF_TRACE
jnz .Lsysc_tracesys
basr %r14,%r9 # call sys_xxxx
- st %r2,__PT_R2(%r11) # store return value
+ stg %r2,__PT_R2(%r11) # store return value
.Lsysc_return:
LOCKDEP_SYS_EXIT
.Lsysc_tif:
tm __PT_PSW+1(%r11),0x01 # returning to user ?
jno .Lsysc_restore
- tm __PT_FLAGS+3(%r11),_PIF_WORK
+ tm __PT_FLAGS+7(%r11),_PIF_WORK
jnz .Lsysc_work
- tm __TI_flags+3(%r12),_TIF_WORK
- jnz .Lsysc_work # check for thread work
- tm __LC_CPU_FLAGS+3,_CIF_WORK
+ tm __TI_flags+7(%r12),_TIF_WORK
+ jnz .Lsysc_work # check for work
+ tm __LC_CPU_FLAGS+7,_CIF_WORK
jnz .Lsysc_work
.Lsysc_restore:
- mvc __LC_RETURN_PSW(8),__PT_PSW(%r11)
+ lg %r14,__LC_VDSO_PER_CPU
+ lmg %r0,%r10,__PT_R0(%r11)
+ mvc __LC_RETURN_PSW(16),__PT_PSW(%r11)
stpt __LC_EXIT_TIMER
- lm %r0,%r15,__PT_R0(%r11)
- lpsw __LC_RETURN_PSW
+ mvc __VDSO_ECTG_BASE(16,%r14),__LC_EXIT_TIMER
+ lmg %r11,%r15,__PT_R11(%r11)
+ lpswe __LC_RETURN_PSW
.Lsysc_done:
#
# One of the work bits is on. Find out which one.
#
.Lsysc_work:
- tm __LC_CPU_FLAGS+3,_CIF_MCCK_PENDING
+ tm __LC_CPU_FLAGS+7,_CIF_MCCK_PENDING
jo .Lsysc_mcck_pending
- tm __TI_flags+3(%r12),_TIF_NEED_RESCHED
+ tm __TI_flags+7(%r12),_TIF_NEED_RESCHED
jo .Lsysc_reschedule
- tm __PT_FLAGS+3(%r11),_PIF_PER_TRAP
+#ifdef CONFIG_UPROBES
+ tm __TI_flags+7(%r12),_TIF_UPROBE
+ jo .Lsysc_uprobe_notify
+#endif
+ tm __PT_FLAGS+7(%r11),_PIF_PER_TRAP
jo .Lsysc_singlestep
- tm __TI_flags+3(%r12),_TIF_SIGPENDING
+ tm __TI_flags+7(%r12),_TIF_SIGPENDING
jo .Lsysc_sigpending
- tm __TI_flags+3(%r12),_TIF_NOTIFY_RESUME
+ tm __TI_flags+7(%r12),_TIF_NOTIFY_RESUME
jo .Lsysc_notify_resume
- tm __LC_CPU_FLAGS+3,_CIF_ASCE
+ tm __LC_CPU_FLAGS+7,_CIF_ASCE
jo .Lsysc_uaccess
j .Lsysc_return # beware of critical section cleanup
@@ -246,109 +284,109 @@ ENTRY(system_call)
# _TIF_NEED_RESCHED is set, call schedule
#
.Lsysc_reschedule:
- l %r1,BASED(.Lc_schedule)
- la %r14,BASED(.Lsysc_return)
- br %r1 # call schedule
+ larl %r14,.Lsysc_return
+ jg schedule
#
# _CIF_MCCK_PENDING is set, call handler
#
.Lsysc_mcck_pending:
- l %r1,BASED(.Lc_handle_mcck)
- la %r14,BASED(.Lsysc_return)
- br %r1 # TIF bit will be cleared by handler
+ larl %r14,.Lsysc_return
+ jg s390_handle_mcck # TIF bit will be cleared by handler
#
# _CIF_ASCE is set, load user space asce
#
.Lsysc_uaccess:
- ni __LC_CPU_FLAGS+3,255-_CIF_ASCE
- lctl %c1,%c1,__LC_USER_ASCE # load primary asce
+ ni __LC_CPU_FLAGS+7,255-_CIF_ASCE
+ lctlg %c1,%c1,__LC_USER_ASCE # load primary asce
j .Lsysc_return
#
# _TIF_SIGPENDING is set, call do_signal
#
.Lsysc_sigpending:
- lr %r2,%r11 # pass pointer to pt_regs
- l %r1,BASED(.Lc_do_signal)
- basr %r14,%r1 # call do_signal
- tm __PT_FLAGS+3(%r11),_PIF_SYSCALL
+ lgr %r2,%r11 # pass pointer to pt_regs
+ brasl %r14,do_signal
+ tm __PT_FLAGS+7(%r11),_PIF_SYSCALL
jno .Lsysc_return
- lm %r2,%r7,__PT_R2(%r11) # load svc arguments
- l %r10,__TI_sysc_table(%r12) # 31 bit system call table
- xr %r8,%r8 # svc 0 returns -ENOSYS
- clc __PT_INT_CODE+2(2,%r11),BASED(.Lnr_syscalls+2)
+ lmg %r2,%r7,__PT_R2(%r11) # load svc arguments
+ lg %r10,__TI_sysc_table(%r12) # address of system call table
+ lghi %r8,0 # svc 0 returns -ENOSYS
+ llgh %r1,__PT_INT_CODE+2(%r11) # load new svc number
+ cghi %r1,NR_syscalls
jnl .Lsysc_nr_ok # invalid svc number -> do svc 0
- lh %r8,__PT_INT_CODE+2(%r11) # load new svc number
- sla %r8,2
+ slag %r8,%r1,2
j .Lsysc_nr_ok # restart svc
#
# _TIF_NOTIFY_RESUME is set, call do_notify_resume
#
.Lsysc_notify_resume:
- lr %r2,%r11 # pass pointer to pt_regs
- l %r1,BASED(.Lc_do_notify_resume)
- la %r14,BASED(.Lsysc_return)
- br %r1 # call do_notify_resume
+ lgr %r2,%r11 # pass pointer to pt_regs
+ larl %r14,.Lsysc_return
+ jg do_notify_resume
+
+#
+# _TIF_UPROBE is set, call uprobe_notify_resume
+#
+#ifdef CONFIG_UPROBES
+.Lsysc_uprobe_notify:
+ lgr %r2,%r11 # pass pointer to pt_regs
+ larl %r14,.Lsysc_return
+ jg uprobe_notify_resume
+#endif
#
# _PIF_PER_TRAP is set, call do_per_trap
#
.Lsysc_singlestep:
- ni __PT_FLAGS+3(%r11),255-_PIF_PER_TRAP
- lr %r2,%r11 # pass pointer to pt_regs
- l %r1,BASED(.Lc_do_per_trap)
- la %r14,BASED(.Lsysc_return)
- br %r1 # call do_per_trap
+ ni __PT_FLAGS+7(%r11),255-_PIF_PER_TRAP
+ lgr %r2,%r11 # pass pointer to pt_regs
+ larl %r14,.Lsysc_return
+ jg do_per_trap
#
# call tracehook_report_syscall_entry/tracehook_report_syscall_exit before
# and after the system call
#
.Lsysc_tracesys:
- l %r1,BASED(.Lc_trace_enter)
- lr %r2,%r11 # pass pointer to pt_regs
+ lgr %r2,%r11 # pass pointer to pt_regs
la %r3,0
- xr %r0,%r0
- icm %r0,3,__PT_INT_CODE+2(%r11)
- st %r0,__PT_R2(%r11)
- basr %r14,%r1 # call do_syscall_trace_enter
- cl %r2,BASED(.Lnr_syscalls)
- jnl .Lsysc_tracenogo
- lr %r8,%r2
- sll %r8,2
- l %r9,0(%r8,%r10)
+ llgh %r0,__PT_INT_CODE+2(%r11)
+ stg %r0,__PT_R2(%r11)
+ brasl %r14,do_syscall_trace_enter
+ lghi %r0,NR_syscalls
+ clgr %r0,%r2
+ jnh .Lsysc_tracenogo
+ sllg %r8,%r2,2
+ lgf %r9,0(%r8,%r10)
.Lsysc_tracego:
- lm %r3,%r7,__PT_R3(%r11)
- st %r7,STACK_FRAME_OVERHEAD(%r15)
- l %r2,__PT_ORIG_GPR2(%r11)
+ lmg %r3,%r7,__PT_R3(%r11)
+ stg %r7,STACK_FRAME_OVERHEAD(%r15)
+ lg %r2,__PT_ORIG_GPR2(%r11)
basr %r14,%r9 # call sys_xxx
- st %r2,__PT_R2(%r11) # store return value
+ stg %r2,__PT_R2(%r11) # store return value
.Lsysc_tracenogo:
- tm __TI_flags+3(%r12),_TIF_TRACE
+ tm __TI_flags+7(%r12),_TIF_TRACE
jz .Lsysc_return
- l %r1,BASED(.Lc_trace_exit)
- lr %r2,%r11 # pass pointer to pt_regs
- la %r14,BASED(.Lsysc_return)
- br %r1 # call do_syscall_trace_exit
+ lgr %r2,%r11 # pass pointer to pt_regs
+ larl %r14,.Lsysc_return
+ jg do_syscall_trace_exit
#
# a new process exits the kernel with ret_from_fork
#
ENTRY(ret_from_fork)
la %r11,STACK_FRAME_OVERHEAD(%r15)
- l %r12,__LC_THREAD_INFO
- l %r13,__LC_SVC_NEW_PSW+4
- l %r1,BASED(.Lc_schedule_tail)
- basr %r14,%r1 # call schedule_tail
+ lg %r12,__LC_THREAD_INFO
+ brasl %r14,schedule_tail
TRACE_IRQS_ON
ssm __LC_SVC_NEW_PSW # reenable interrupts
tm __PT_PSW+1(%r11),0x01 # forking a kernel thread ?
jne .Lsysc_tracenogo
# it's a kernel thread
- lm %r9,%r10,__PT_R9(%r11) # load gprs
+ lmg %r9,%r10,__PT_R9(%r11) # load gprs
ENTRY(kernel_thread_starter)
la %r2,0(%r10)
basr %r14,%r9
@@ -360,46 +398,54 @@ ENTRY(kernel_thread_starter)
ENTRY(pgm_check_handler)
stpt __LC_SYNC_ENTER_TIMER
- stm %r8,%r15,__LC_SAVE_AREA_SYNC
- l %r12,__LC_THREAD_INFO
- l %r13,__LC_SVC_NEW_PSW+4
- lm %r8,%r9,__LC_PGM_OLD_PSW
- tmh %r8,0x0001 # test problem state bit
+ stmg %r8,%r15,__LC_SAVE_AREA_SYNC
+ lg %r10,__LC_LAST_BREAK
+ lg %r12,__LC_THREAD_INFO
+ larl %r13,system_call
+ lmg %r8,%r9,__LC_PGM_OLD_PSW
+ HANDLE_SIE_INTERCEPT %r14,1
+ tmhh %r8,0x0001 # test problem state bit
jnz 1f # -> fault in user space
- tmh %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
tm __LC_PGM_ILC+3,0x80 # check for per exception
jnz .Lpgm_svcper # -> single stepped svc
0: CHECK_STACK STACK_SIZE,__LC_SAVE_AREA_SYNC
- ahi %r15,-(STACK_FRAME_OVERHEAD + __PT_SIZE)
+ aghi %r15,-(STACK_FRAME_OVERHEAD + __PT_SIZE)
j 2f
-1: UPDATE_VTIME %r14,%r15,__LC_SYNC_ENTER_TIMER
- l %r15,__LC_KERNEL_STACK
+1: UPDATE_VTIME %r14,__LC_SYNC_ENTER_TIMER
+ LAST_BREAK %r14
+ lg %r15,__LC_KERNEL_STACK
+ lg %r14,__TI_task(%r12)
+ lghi %r13,__LC_PGM_TDB
+ tm __LC_PGM_ILC+2,0x02 # check for transaction abort
+ jz 2f
+ mvc __THREAD_trap_tdb(256,%r14),0(%r13)
2: la %r11,STACK_FRAME_OVERHEAD(%r15)
- stm %r0,%r7,__PT_R0(%r11)
- mvc __PT_R8(32,%r11),__LC_SAVE_AREA_SYNC
- stm %r8,%r9,__PT_PSW(%r11)
+ stmg %r0,%r7,__PT_R0(%r11)
+ mvc __PT_R8(64,%r11),__LC_SAVE_AREA_SYNC
+ stmg %r8,%r9,__PT_PSW(%r11)
mvc __PT_INT_CODE(4,%r11),__LC_PGM_ILC
- mvc __PT_INT_PARM_LONG(4,%r11),__LC_TRANS_EXC_CODE
- xc __PT_FLAGS(4,%r11),__PT_FLAGS(%r11)
+ 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
- l %r1,__TI_task(%r12)
- tmh %r8,0x0001 # kernel per event ?
+ tmhh %r8,0x0001 # kernel per event ?
jz .Lpgm_kprobe
- oi __PT_FLAGS+3(%r11),_PIF_PER_TRAP
- mvc __THREAD_per_address(4,%r1),__LC_PER_ADDRESS
- mvc __THREAD_per_cause(2,%r1),__LC_PER_CODE
- mvc __THREAD_per_paid(1,%r1),__LC_PER_ACCESS_ID
+ 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
0: REENABLE_IRQS
- xc __SF_BACKCHAIN(4,%r15),__SF_BACKCHAIN(%r15)
- l %r1,BASED(.Lc_jump_table)
- la %r10,0x7f
- n %r10,__PT_INT_CODE(%r11)
- je .Lsysc_return
+ xc __SF_BACKCHAIN(8,%r15),__SF_BACKCHAIN(%r15)
+ larl %r1,pgm_check_table
+ llgh %r10,__PT_INT_CODE+2(%r11)
+ nill %r10,0x007f
sll %r10,2
- l %r1,0(%r10,%r1) # load address of handler routine
- lr %r2,%r11 # pass pointer to pt_regs
+ je .Lsysc_return
+ lgf %r1,0(%r10,%r1) # load address of handler routine
+ lgr %r2,%r11 # pass pointer to pt_regs
basr %r14,%r1 # branch to interrupt-handler
j .Lsysc_return
@@ -408,54 +454,55 @@ ENTRY(pgm_check_handler)
#
.Lpgm_kprobe:
REENABLE_IRQS
- xc __SF_BACKCHAIN(4,%r15),__SF_BACKCHAIN(%r15)
- l %r1,BASED(.Lc_do_per_trap)
- lr %r2,%r11 # pass pointer to pt_regs
- basr %r14,%r1 # call do_per_trap
+ xc __SF_BACKCHAIN(8,%r15),__SF_BACKCHAIN(%r15)
+ lgr %r2,%r11 # pass pointer to pt_regs
+ brasl %r14,do_per_trap
j .Lsysc_return
#
# single stepped system call
#
.Lpgm_svcper:
- mvc __LC_RETURN_PSW(4),__LC_SVC_NEW_PSW
- mvc __LC_RETURN_PSW+4(4),BASED(.Lc_sysc_per)
- lhi %r14,_PIF_SYSCALL | _PIF_PER_TRAP
- lpsw __LC_RETURN_PSW # branch to .Lsysc_per and enable irqs
+ mvc __LC_RETURN_PSW(8),__LC_SVC_NEW_PSW
+ larl %r14,.Lsysc_per
+ stg %r14,__LC_RETURN_PSW+8
+ lghi %r14,_PIF_SYSCALL | _PIF_PER_TRAP
+ lpswe __LC_RETURN_PSW # branch to .Lsysc_per and enable irqs
/*
* IO interrupt handler routine
*/
-
ENTRY(io_int_handler)
- stck __LC_INT_CLOCK
+ STCK __LC_INT_CLOCK
stpt __LC_ASYNC_ENTER_TIMER
- stm %r8,%r15,__LC_SAVE_AREA_ASYNC
- l %r12,__LC_THREAD_INFO
- l %r13,__LC_SVC_NEW_PSW+4
- lm %r8,%r9,__LC_IO_OLD_PSW
- tmh %r8,0x0001 # interrupting from user ?
+ stmg %r8,%r15,__LC_SAVE_AREA_ASYNC
+ lg %r10,__LC_LAST_BREAK
+ lg %r12,__LC_THREAD_INFO
+ larl %r13,system_call
+ lmg %r8,%r9,__LC_IO_OLD_PSW
+ HANDLE_SIE_INTERCEPT %r14,2
+ SWITCH_ASYNC __LC_SAVE_AREA_ASYNC,__LC_ASYNC_STACK,STACK_SHIFT
+ tmhh %r8,0x0001 # interrupting from user?
jz .Lio_skip
- UPDATE_VTIME %r14,%r15,__LC_ASYNC_ENTER_TIMER
+ UPDATE_VTIME %r14,__LC_ASYNC_ENTER_TIMER
+ LAST_BREAK %r14
.Lio_skip:
- SWITCH_ASYNC __LC_SAVE_AREA_ASYNC,__LC_ASYNC_STACK,STACK_SHIFT
- stm %r0,%r7,__PT_R0(%r11)
- mvc __PT_R8(32,%r11),__LC_SAVE_AREA_ASYNC
- stm %r8,%r9,__PT_PSW(%r11)
+ stmg %r0,%r7,__PT_R0(%r11)
+ 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(4,%r11),__PT_FLAGS(%r11)
+ xc __PT_FLAGS(8,%r11),__PT_FLAGS(%r11)
TRACE_IRQS_OFF
- xc __SF_BACKCHAIN(4,%r15),__SF_BACKCHAIN(%r15)
+ xc __SF_BACKCHAIN(8,%r15),__SF_BACKCHAIN(%r15)
.Lio_loop:
- l %r1,BASED(.Lc_do_IRQ)
- lr %r2,%r11 # pass pointer to pt_regs
- lhi %r3,IO_INTERRUPT
+ lgr %r2,%r11 # pass pointer to pt_regs
+ lghi %r3,IO_INTERRUPT
tm __PT_INT_CODE+8(%r11),0x80 # adapter interrupt ?
jz .Lio_call
- lhi %r3,THIN_INTERRUPT
+ lghi %r3,THIN_INTERRUPT
.Lio_call:
- basr %r14,%r1 # call do_IRQ
- tm __LC_MACHINE_FLAGS+2,0x10 # MACHINE_FLAG_LPAR
+ brasl %r14,do_IRQ
+ tm __LC_MACHINE_FLAGS+6,0x10 # MACHINE_FLAG_LPAR
jz .Lio_return
tpi 0
jz .Lio_return
@@ -465,21 +512,26 @@ ENTRY(io_int_handler)
LOCKDEP_SYS_EXIT
TRACE_IRQS_ON
.Lio_tif:
- tm __TI_flags+3(%r12),_TIF_WORK
+ tm __TI_flags+7(%r12),_TIF_WORK
jnz .Lio_work # there is work to do (signals etc.)
- tm __LC_CPU_FLAGS+3,_CIF_WORK
+ tm __LC_CPU_FLAGS+7,_CIF_WORK
jnz .Lio_work
.Lio_restore:
- mvc __LC_RETURN_PSW(8),__PT_PSW(%r11)
+ lg %r14,__LC_VDSO_PER_CPU
+ lmg %r0,%r10,__PT_R0(%r11)
+ mvc __LC_RETURN_PSW(16),__PT_PSW(%r11)
stpt __LC_EXIT_TIMER
- lm %r0,%r15,__PT_R0(%r11)
- lpsw __LC_RETURN_PSW
+ mvc __VDSO_ECTG_BASE(16,%r14),__LC_EXIT_TIMER
+ lmg %r11,%r15,__PT_R11(%r11)
+ lpswe __LC_RETURN_PSW
.Lio_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 work
-# 2) if we return to kernel code and preemptive scheduling is enabled check
+# 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
# 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.
#
@@ -489,21 +541,20 @@ ENTRY(io_int_handler)
#ifdef CONFIG_PREEMPT
# check for preemptive scheduling
icm %r0,15,__TI_precount(%r12)
- jnz .Lio_restore # preemption disabled
- tm __TI_flags+3(%r12),_TIF_NEED_RESCHED
+ jnz .Lio_restore # preemption is disabled
+ tm __TI_flags+7(%r12),_TIF_NEED_RESCHED
jno .Lio_restore
# switch to kernel stack
- l %r1,__PT_R15(%r11)
- ahi %r1,-(STACK_FRAME_OVERHEAD + __PT_SIZE)
+ lg %r1,__PT_R15(%r11)
+ aghi %r1,-(STACK_FRAME_OVERHEAD + __PT_SIZE)
mvc STACK_FRAME_OVERHEAD(__PT_SIZE,%r1),0(%r11)
- xc __SF_BACKCHAIN(4,%r1),__SF_BACKCHAIN(%r1)
+ xc __SF_BACKCHAIN(8,%r1),__SF_BACKCHAIN(%r1)
la %r11,STACK_FRAME_OVERHEAD(%r1)
- lr %r15,%r1
+ lgr %r15,%r1
# TRACE_IRQS_ON already done at .Lio_return, call
# TRACE_IRQS_OFF to keep things symmetrical
TRACE_IRQS_OFF
- l %r1,BASED(.Lc_preempt_irq)
- basr %r14,%r1 # call preempt_schedule_irq
+ brasl %r14,preempt_schedule_irq
j .Lio_return
#else
j .Lio_restore
@@ -513,25 +564,25 @@ ENTRY(io_int_handler)
# Need to do work before returning to userspace, switch to kernel stack
#
.Lio_work_user:
- l %r1,__LC_KERNEL_STACK
+ lg %r1,__LC_KERNEL_STACK
mvc STACK_FRAME_OVERHEAD(__PT_SIZE,%r1),0(%r11)
- xc __SF_BACKCHAIN(4,%r1),__SF_BACKCHAIN(%r1)
+ xc __SF_BACKCHAIN(8,%r1),__SF_BACKCHAIN(%r1)
la %r11,STACK_FRAME_OVERHEAD(%r1)
- lr %r15,%r1
+ lgr %r15,%r1
#
# One of the work bits is on. Find out which one.
#
.Lio_work_tif:
- tm __LC_CPU_FLAGS+3(%r12),_CIF_MCCK_PENDING
+ tm __LC_CPU_FLAGS+7,_CIF_MCCK_PENDING
jo .Lio_mcck_pending
- tm __TI_flags+3(%r12),_TIF_NEED_RESCHED
+ tm __TI_flags+7(%r12),_TIF_NEED_RESCHED
jo .Lio_reschedule
- tm __TI_flags+3(%r12),_TIF_SIGPENDING
+ tm __TI_flags+7(%r12),_TIF_SIGPENDING
jo .Lio_sigpending
- tm __TI_flags+3(%r12),_TIF_NOTIFY_RESUME
+ tm __TI_flags+7(%r12),_TIF_NOTIFY_RESUME
jo .Lio_notify_resume
- tm __LC_CPU_FLAGS+3,_CIF_ASCE
+ tm __LC_CPU_FLAGS+7,_CIF_ASCE
jo .Lio_uaccess
j .Lio_return # beware of critical section cleanup
@@ -540,8 +591,7 @@ ENTRY(io_int_handler)
#
.Lio_mcck_pending:
# TRACE_IRQS_ON already done at .Lio_return
- l %r1,BASED(.Lc_handle_mcck)
- basr %r14,%r1 # TIF bit will be cleared by handler
+ brasl %r14,s390_handle_mcck # TIF bit will be cleared by handler
TRACE_IRQS_OFF
j .Lio_return
@@ -549,8 +599,8 @@ ENTRY(io_int_handler)
# _CIF_ASCE is set, load user space asce
#
.Lio_uaccess:
- ni __LC_CPU_FLAGS+3,255-_CIF_ASCE
- lctl %c1,%c1,__LC_USER_ASCE # load primary asce
+ ni __LC_CPU_FLAGS+7,255-_CIF_ASCE
+ lctlg %c1,%c1,__LC_USER_ASCE # load primary asce
j .Lio_return
#
@@ -558,35 +608,32 @@ ENTRY(io_int_handler)
#
.Lio_reschedule:
# TRACE_IRQS_ON already done at .Lio_return
- l %r1,BASED(.Lc_schedule)
ssm __LC_SVC_NEW_PSW # reenable interrupts
- basr %r14,%r1 # call scheduler
+ brasl %r14,schedule # call scheduler
ssm __LC_PGM_NEW_PSW # disable I/O and ext. interrupts
TRACE_IRQS_OFF
j .Lio_return
#
-# _TIF_SIGPENDING is set, call do_signal
+# _TIF_SIGPENDING or is set, call do_signal
#
.Lio_sigpending:
# TRACE_IRQS_ON already done at .Lio_return
- l %r1,BASED(.Lc_do_signal)
ssm __LC_SVC_NEW_PSW # reenable interrupts
- lr %r2,%r11 # pass pointer to pt_regs
- basr %r14,%r1 # call do_signal
+ lgr %r2,%r11 # pass pointer to pt_regs
+ brasl %r14,do_signal
ssm __LC_PGM_NEW_PSW # disable I/O and ext. interrupts
TRACE_IRQS_OFF
j .Lio_return
#
-# _TIF_SIGPENDING is set, call do_signal
+# _TIF_NOTIFY_RESUME or is set, call do_notify_resume
#
.Lio_notify_resume:
# TRACE_IRQS_ON already done at .Lio_return
- l %r1,BASED(.Lc_do_notify_resume)
ssm __LC_SVC_NEW_PSW # reenable interrupts
- lr %r2,%r11 # pass pointer to pt_regs
- basr %r14,%r1 # call do_notify_resume
+ lgr %r2,%r11 # pass pointer to pt_regs
+ brasl %r14,do_notify_resume
ssm __LC_PGM_NEW_PSW # disable I/O and ext. interrupts
TRACE_IRQS_OFF
j .Lio_return
@@ -594,45 +641,47 @@ ENTRY(io_int_handler)
/*
* External interrupt handler routine
*/
-
ENTRY(ext_int_handler)
- stck __LC_INT_CLOCK
+ STCK __LC_INT_CLOCK
stpt __LC_ASYNC_ENTER_TIMER
- stm %r8,%r15,__LC_SAVE_AREA_ASYNC
- l %r12,__LC_THREAD_INFO
- l %r13,__LC_SVC_NEW_PSW+4
- lm %r8,%r9,__LC_EXT_OLD_PSW
- tmh %r8,0x0001 # interrupting from user ?
+ stmg %r8,%r15,__LC_SAVE_AREA_ASYNC
+ lg %r10,__LC_LAST_BREAK
+ lg %r12,__LC_THREAD_INFO
+ larl %r13,system_call
+ lmg %r8,%r9,__LC_EXT_OLD_PSW
+ HANDLE_SIE_INTERCEPT %r14,3
+ SWITCH_ASYNC __LC_SAVE_AREA_ASYNC,__LC_ASYNC_STACK,STACK_SHIFT
+ tmhh %r8,0x0001 # interrupting from user ?
jz .Lext_skip
- UPDATE_VTIME %r14,%r15,__LC_ASYNC_ENTER_TIMER
+ UPDATE_VTIME %r14,__LC_ASYNC_ENTER_TIMER
+ LAST_BREAK %r14
.Lext_skip:
- SWITCH_ASYNC __LC_SAVE_AREA_ASYNC,__LC_ASYNC_STACK,STACK_SHIFT
- stm %r0,%r7,__PT_R0(%r11)
- mvc __PT_R8(32,%r11),__LC_SAVE_AREA_ASYNC
- stm %r8,%r9,__PT_PSW(%r11)
+ stmg %r0,%r7,__PT_R0(%r11)
+ mvc __PT_R8(64,%r11),__LC_SAVE_AREA_ASYNC
+ stmg %r8,%r9,__PT_PSW(%r11)
+ lghi %r1,__LC_EXT_PARAMS2
mvc __PT_INT_CODE(4,%r11),__LC_EXT_CPU_ADDR
mvc __PT_INT_PARM(4,%r11),__LC_EXT_PARAMS
- xc __PT_FLAGS(4,%r11),__PT_FLAGS(%r11)
+ mvc __PT_INT_PARM_LONG(8,%r11),0(%r1)
+ xc __PT_FLAGS(8,%r11),__PT_FLAGS(%r11)
TRACE_IRQS_OFF
- l %r1,BASED(.Lc_do_IRQ)
- lr %r2,%r11 # pass pointer to pt_regs
- lhi %r3,EXT_INTERRUPT
- basr %r14,%r1 # call do_IRQ
+ xc __SF_BACKCHAIN(8,%r15),__SF_BACKCHAIN(%r15)
+ lgr %r2,%r11 # pass pointer to pt_regs
+ lghi %r3,EXT_INTERRUPT
+ brasl %r14,do_IRQ
j .Lio_return
/*
* Load idle PSW. The second "half" of this function is in .Lcleanup_idle.
*/
ENTRY(psw_idle)
- st %r3,__SF_EMPTY(%r15)
- basr %r1,0
- la %r1,.Lpsw_idle_lpsw+4-.(%r1)
- st %r1,__SF_EMPTY+4(%r15)
- oi __SF_EMPTY+4(%r15),0x80
- stck __CLOCK_IDLE_ENTER(%r2)
+ stg %r3,__SF_EMPTY(%r15)
+ larl %r1,.Lpsw_idle_lpsw+4
+ stg %r1,__SF_EMPTY+8(%r15)
+ STCK __CLOCK_IDLE_ENTER(%r2)
stpt __TIMER_IDLE_ENTER(%r2)
.Lpsw_idle_lpsw:
- lpsw __SF_EMPTY(%r15)
+ lpswe __SF_EMPTY(%r15)
br %r14
.Lpsw_idle_end:
@@ -641,17 +690,19 @@ ENTRY(psw_idle)
/*
* Machine check handler routines
*/
-
ENTRY(mcck_int_handler)
- stck __LC_MCCK_CLOCK
- spt __LC_CPU_TIMER_SAVE_AREA # revalidate cpu timer
- lm %r0,%r15,__LC_GPREGS_SAVE_AREA # revalidate gprs
- l %r12,__LC_THREAD_INFO
- l %r13,__LC_SVC_NEW_PSW+4
- lm %r8,%r9,__LC_MCK_OLD_PSW
+ STCK __LC_MCCK_CLOCK
+ la %r1,4095 # revalidate r1
+ spt __LC_CPU_TIMER_SAVE_AREA-4095(%r1) # revalidate cpu timer
+ lmg %r0,%r15,__LC_GPREGS_SAVE_AREA-4095(%r1)# revalidate gprs
+ lg %r10,__LC_LAST_BREAK
+ lg %r12,__LC_THREAD_INFO
+ larl %r13,system_call
+ lmg %r8,%r9,__LC_MCK_OLD_PSW
+ HANDLE_SIE_INTERCEPT %r14,4
tm __LC_MCCK_CODE,0x80 # system damage?
jo .Lmcck_panic # yes -> rest of mcck code invalid
- la %r14,__LC_CPU_TIMER_SAVE_AREA
+ lghi %r14,__LC_CPU_TIMER_SAVE_AREA
mvc __LC_MCCK_ENTER_TIMER(8),0(%r14)
tm __LC_MCCK_CODE+5,0x02 # stored cpu timer value valid?
jo 3f
@@ -669,76 +720,76 @@ ENTRY(mcck_int_handler)
mvc __LC_MCCK_ENTER_TIMER(8),0(%r14)
3: tm __LC_MCCK_CODE+2,0x09 # mwp + ia of old psw valid?
jno .Lmcck_panic # no -> skip cleanup critical
+ SWITCH_ASYNC __LC_GPREGS_SAVE_AREA+64,__LC_PANIC_STACK,PAGE_SHIFT
tm %r8,0x0001 # interrupting from user ?
jz .Lmcck_skip
- UPDATE_VTIME %r14,%r15,__LC_MCCK_ENTER_TIMER
+ UPDATE_VTIME %r14,__LC_MCCK_ENTER_TIMER
+ LAST_BREAK %r14
.Lmcck_skip:
- SWITCH_ASYNC __LC_GPREGS_SAVE_AREA+32,__LC_PANIC_STACK,PAGE_SHIFT
- stm %r0,%r7,__PT_R0(%r11)
- mvc __PT_R8(32,%r11),__LC_GPREGS_SAVE_AREA+32
- stm %r8,%r9,__PT_PSW(%r11)
- xc __PT_FLAGS(4,%r11),__PT_FLAGS(%r11)
- xc __SF_BACKCHAIN(4,%r15),__SF_BACKCHAIN(%r15)
- l %r1,BASED(.Lc_do_machine_check)
- lr %r2,%r11 # pass pointer to pt_regs
- basr %r14,%r1 # call s390_do_machine_check
+ lghi %r14,__LC_GPREGS_SAVE_AREA+64
+ 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
tm __PT_PSW+1(%r11),0x01 # returning to user ?
jno .Lmcck_return
- l %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)
- xc __SF_BACKCHAIN(4,%r1),__SF_BACKCHAIN(%r1)
- la %r11,STACK_FRAME_OVERHEAD(%r15)
- lr %r15,%r1
+ xc __SF_BACKCHAIN(8,%r1),__SF_BACKCHAIN(%r1)
+ la %r11,STACK_FRAME_OVERHEAD(%r1)
+ lgr %r15,%r1
ssm __LC_PGM_NEW_PSW # turn dat on, keep irqs off
- tm __LC_CPU_FLAGS+3,_CIF_MCCK_PENDING
+ tm __LC_CPU_FLAGS+7,_CIF_MCCK_PENDING
jno .Lmcck_return
TRACE_IRQS_OFF
- l %r1,BASED(.Lc_handle_mcck)
- basr %r14,%r1 # call s390_handle_mcck
+ brasl %r14,s390_handle_mcck
TRACE_IRQS_ON
.Lmcck_return:
- mvc __LC_RETURN_MCCK_PSW(8),__PT_PSW(%r11) # move return PSW
+ lg %r14,__LC_VDSO_PER_CPU
+ lmg %r0,%r10,__PT_R0(%r11)
+ mvc __LC_RETURN_MCCK_PSW(16),__PT_PSW(%r11) # move return PSW
tm __LC_RETURN_MCCK_PSW+1,0x01 # returning to user ?
jno 0f
- lm %r0,%r15,__PT_R0(%r11)
stpt __LC_EXIT_TIMER
- lpsw __LC_RETURN_MCCK_PSW
-0: lm %r0,%r15,__PT_R0(%r11)
- lpsw __LC_RETURN_MCCK_PSW
+ mvc __VDSO_ECTG_BASE(16,%r14),__LC_EXIT_TIMER
+0: lmg %r11,%r15,__PT_R11(%r11)
+ lpswe __LC_RETURN_MCCK_PSW
.Lmcck_panic:
- l %r14,__LC_PANIC_STACK
- slr %r14,%r15
- sra %r14,PAGE_SHIFT
+ lg %r14,__LC_PANIC_STACK
+ slgr %r14,%r15
+ srag %r14,%r14,PAGE_SHIFT
jz 0f
- l %r15,__LC_PANIC_STACK
- j .Lmcck_skip
-0: ahi %r15,-(STACK_FRAME_OVERHEAD + __PT_SIZE)
+ lg %r15,__LC_PANIC_STACK
+0: aghi %r15,-(STACK_FRAME_OVERHEAD + __PT_SIZE)
j .Lmcck_skip
#
# PSW restart interrupt handler
#
ENTRY(restart_int_handler)
- st %r15,__LC_SAVE_AREA_RESTART
- l %r15,__LC_RESTART_STACK
- ahi %r15,-__PT_SIZE # create pt_regs on stack
+ stg %r15,__LC_SAVE_AREA_RESTART
+ lg %r15,__LC_RESTART_STACK
+ aghi %r15,-__PT_SIZE # create pt_regs on stack
xc 0(__PT_SIZE,%r15),0(%r15)
- stm %r0,%r14,__PT_R0(%r15)
- mvc __PT_R15(4,%r15),__LC_SAVE_AREA_RESTART
- mvc __PT_PSW(8,%r15),__LC_RST_OLD_PSW # store restart old psw
- ahi %r15,-STACK_FRAME_OVERHEAD # create stack frame on stack
+ stmg %r0,%r14,__PT_R0(%r15)
+ mvc __PT_R15(8,%r15),__LC_SAVE_AREA_RESTART
+ mvc __PT_PSW(16,%r15),__LC_RST_OLD_PSW # store restart old psw
+ aghi %r15,-STACK_FRAME_OVERHEAD # create stack frame on stack
xc 0(STACK_FRAME_OVERHEAD,%r15),0(%r15)
- l %r1,__LC_RESTART_FN # load fn, parm & source cpu
- l %r2,__LC_RESTART_DATA
- l %r3,__LC_RESTART_SOURCE
- ltr %r3,%r3 # test source cpu address
+ lg %r1,__LC_RESTART_FN # load fn, parm & source cpu
+ lg %r2,__LC_RESTART_DATA
+ lg %r3,__LC_RESTART_SOURCE
+ ltgr %r3,%r3 # test source cpu address
jm 1f # negative -> skip source stop
0: sigp %r4,%r3,SIGP_SENSE # sigp sense to source cpu
brc 10,0b # wait for status stored
1: basr %r14,%r1 # call function
stap __SF_EMPTY(%r15) # store cpu address
- lh %r3,__SF_EMPTY(%r15)
+ llgh %r3,__SF_EMPTY(%r15)
2: sigp %r4,%r3,SIGP_STOP # sigp stop to current cpu
brc 2,2b
3: j 3b
@@ -752,215 +803,257 @@ ENTRY(restart_int_handler)
* Setup a pt_regs so that show_trace can provide a good call trace.
*/
stack_overflow:
- l %r15,__LC_PANIC_STACK # change to panic stack
+ lg %r15,__LC_PANIC_STACK # change to panic stack
la %r11,STACK_FRAME_OVERHEAD(%r15)
- stm %r0,%r7,__PT_R0(%r11)
- stm %r8,%r9,__PT_PSW(%r11)
- mvc __PT_R8(32,%r11),0(%r14)
- l %r1,BASED(1f)
- xc __SF_BACKCHAIN(4,%r15),__SF_BACKCHAIN(%r15)
- lr %r2,%r11 # pass pointer to pt_regs
- br %r1 # branch to kernel_stack_overflow
-1: .long kernel_stack_overflow
+ stmg %r0,%r7,__PT_R0(%r11)
+ stmg %r8,%r9,__PT_PSW(%r11)
+ mvc __PT_R8(64,%r11),0(%r14)
+ stg %r10,__PT_ORIG_GPR2(%r11) # store last break to orig_gpr2
+ xc __SF_BACKCHAIN(8,%r15),__SF_BACKCHAIN(%r15)
+ lgr %r2,%r11 # pass pointer to pt_regs
+ jg kernel_stack_overflow
#endif
+ .align 8
.Lcleanup_table:
- .long system_call + 0x80000000
- .long .Lsysc_do_svc + 0x80000000
- .long .Lsysc_tif + 0x80000000
- .long .Lsysc_restore + 0x80000000
- .long .Lsysc_done + 0x80000000
- .long .Lio_tif + 0x80000000
- .long .Lio_restore + 0x80000000
- .long .Lio_done + 0x80000000
- .long psw_idle + 0x80000000
- .long .Lpsw_idle_end + 0x80000000
+ .quad system_call
+ .quad .Lsysc_do_svc
+ .quad .Lsysc_tif
+ .quad .Lsysc_restore
+ .quad .Lsysc_done
+ .quad .Lio_tif
+ .quad .Lio_restore
+ .quad .Lio_done
+ .quad psw_idle
+ .quad .Lpsw_idle_end
cleanup_critical:
- cl %r9,BASED(.Lcleanup_table) # system_call
+ clg %r9,BASED(.Lcleanup_table) # system_call
jl 0f
- cl %r9,BASED(.Lcleanup_table+4) # .Lsysc_do_svc
+ clg %r9,BASED(.Lcleanup_table+8) # .Lsysc_do_svc
jl .Lcleanup_system_call
- cl %r9,BASED(.Lcleanup_table+8) # .Lsysc_tif
+ clg %r9,BASED(.Lcleanup_table+16) # .Lsysc_tif
jl 0f
- cl %r9,BASED(.Lcleanup_table+12) # .Lsysc_restore
+ clg %r9,BASED(.Lcleanup_table+24) # .Lsysc_restore
jl .Lcleanup_sysc_tif
- cl %r9,BASED(.Lcleanup_table+16) # .Lsysc_done
+ clg %r9,BASED(.Lcleanup_table+32) # .Lsysc_done
jl .Lcleanup_sysc_restore
- cl %r9,BASED(.Lcleanup_table+20) # .Lio_tif
+ clg %r9,BASED(.Lcleanup_table+40) # .Lio_tif
jl 0f
- cl %r9,BASED(.Lcleanup_table+24) # .Lio_restore
+ clg %r9,BASED(.Lcleanup_table+48) # .Lio_restore
jl .Lcleanup_io_tif
- cl %r9,BASED(.Lcleanup_table+28) # .Lio_done
+ clg %r9,BASED(.Lcleanup_table+56) # .Lio_done
jl .Lcleanup_io_restore
- cl %r9,BASED(.Lcleanup_table+32) # psw_idle
+ clg %r9,BASED(.Lcleanup_table+64) # psw_idle
jl 0f
- cl %r9,BASED(.Lcleanup_table+36) # .Lpsw_idle_end
+ clg %r9,BASED(.Lcleanup_table+72) # .Lpsw_idle_end
jl .Lcleanup_idle
0: br %r14
+
.Lcleanup_system_call:
# check if stpt has been executed
- cl %r9,BASED(.Lcleanup_system_call_insn)
+ clg %r9,BASED(.Lcleanup_system_call_insn)
jh 0f
mvc __LC_SYNC_ENTER_TIMER(8),__LC_ASYNC_ENTER_TIMER
- chi %r11,__LC_SAVE_AREA_ASYNC
+ cghi %r11,__LC_SAVE_AREA_ASYNC
je 0f
mvc __LC_SYNC_ENTER_TIMER(8),__LC_MCCK_ENTER_TIMER
-0: # check if stm has been executed
- cl %r9,BASED(.Lcleanup_system_call_insn+4)
+0: # check if stmg has been executed
+ clg %r9,BASED(.Lcleanup_system_call_insn+8)
jh 0f
- mvc __LC_SAVE_AREA_SYNC(32),0(%r11)
-0: # set up saved registers r12, and r13
- st %r12,16(%r11) # r12 thread-info pointer
- st %r13,20(%r11) # r13 literal-pool pointer
- # check if the user time calculation has been done
- cl %r9,BASED(.Lcleanup_system_call_insn+8)
+ mvc __LC_SAVE_AREA_SYNC(64),0(%r11)
+0: # check if base register setup + TIF bit load has been done
+ clg %r9,BASED(.Lcleanup_system_call_insn+16)
+ jhe 0f
+ # set up saved registers r10 and r12
+ stg %r10,16(%r11) # r10 last break
+ stg %r12,32(%r11) # r12 thread-info pointer
+0: # check if the user time update has been done
+ clg %r9,BASED(.Lcleanup_system_call_insn+24)
jh 0f
- l %r10,__LC_EXIT_TIMER
- l %r15,__LC_EXIT_TIMER+4
- SUB64 %r10,%r15,__LC_SYNC_ENTER_TIMER
- ADD64 %r10,%r15,__LC_USER_TIMER
- st %r10,__LC_USER_TIMER
- st %r15,__LC_USER_TIMER+4
-0: # check if the system time calculation has been done
- cl %r9,BASED(.Lcleanup_system_call_insn+12)
+ lg %r15,__LC_EXIT_TIMER
+ slg %r15,__LC_SYNC_ENTER_TIMER
+ alg %r15,__LC_USER_TIMER
+ stg %r15,__LC_USER_TIMER
+0: # check if the system time update has been done
+ clg %r9,BASED(.Lcleanup_system_call_insn+32)
jh 0f
- l %r10,__LC_LAST_UPDATE_TIMER
- l %r15,__LC_LAST_UPDATE_TIMER+4
- SUB64 %r10,%r15,__LC_EXIT_TIMER
- ADD64 %r10,%r15,__LC_SYSTEM_TIMER
- st %r10,__LC_SYSTEM_TIMER
- st %r15,__LC_SYSTEM_TIMER+4
+ lg %r15,__LC_LAST_UPDATE_TIMER
+ slg %r15,__LC_EXIT_TIMER
+ alg %r15,__LC_SYSTEM_TIMER
+ stg %r15,__LC_SYSTEM_TIMER
0: # update accounting time stamp
mvc __LC_LAST_UPDATE_TIMER(8),__LC_SYNC_ENTER_TIMER
- # set up saved register 11
- l %r15,__LC_KERNEL_STACK
+ # do LAST_BREAK
+ lg %r9,16(%r11)
+ srag %r9,%r9,23
+ jz 0f
+ mvc __TI_last_break(8,%r12),16(%r11)
+0: # set up saved register r11
+ lg %r15,__LC_KERNEL_STACK
la %r9,STACK_FRAME_OVERHEAD(%r15)
- st %r9,12(%r11) # r11 pt_regs pointer
+ stg %r9,24(%r11) # r11 pt_regs pointer
# fill pt_regs
- mvc __PT_R8(32,%r9),__LC_SAVE_AREA_SYNC
- stm %r0,%r7,__PT_R0(%r9)
- mvc __PT_PSW(8,%r9),__LC_SVC_OLD_PSW
+ mvc __PT_R8(64,%r9),__LC_SAVE_AREA_SYNC
+ 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(4,%r9),__PT_FLAGS(%r9)
- mvi __PT_FLAGS+3(%r9),_PIF_SYSCALL
- # setup saved register 15
- st %r15,28(%r11) # r15 stack pointer
+ 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
- l %r9,BASED(.Lcleanup_table+4) # .Lsysc_do_svc + 0x80000000
+ larl %r9,.Lsysc_do_svc
br %r14
.Lcleanup_system_call_insn:
- .long system_call + 0x80000000
- .long .Lsysc_stm + 0x80000000
- .long .Lsysc_vtime + 0x80000000 + 36
- .long .Lsysc_vtime + 0x80000000 + 76
+ .quad system_call
+ .quad .Lsysc_stmg
+ .quad .Lsysc_per
+ .quad .Lsysc_vtime+18
+ .quad .Lsysc_vtime+42
.Lcleanup_sysc_tif:
- l %r9,BASED(.Lcleanup_table+8) # .Lsysc_tif + 0x80000000
+ larl %r9,.Lsysc_tif
br %r14
.Lcleanup_sysc_restore:
- cl %r9,BASED(.Lcleanup_sysc_restore_insn)
- jhe 0f
- l %r9,12(%r11) # get saved pointer to pt_regs
- mvc __LC_RETURN_PSW(8),__PT_PSW(%r9)
- mvc 0(32,%r11),__PT_R8(%r9)
- lm %r0,%r7,__PT_R0(%r9)
-0: lm %r8,%r9,__LC_RETURN_PSW
+ clg %r9,BASED(.Lcleanup_sysc_restore_insn)
+ je 0f
+ lg %r9,24(%r11) # get saved pointer to pt_regs
+ mvc __LC_RETURN_PSW(16),__PT_PSW(%r9)
+ mvc 0(64,%r11),__PT_R8(%r9)
+ lmg %r0,%r7,__PT_R0(%r9)
+0: lmg %r8,%r9,__LC_RETURN_PSW
br %r14
.Lcleanup_sysc_restore_insn:
- .long .Lsysc_done - 4 + 0x80000000
+ .quad .Lsysc_done - 4
.Lcleanup_io_tif:
- l %r9,BASED(.Lcleanup_table+20) # .Lio_tif + 0x80000000
+ larl %r9,.Lio_tif
br %r14
.Lcleanup_io_restore:
- cl %r9,BASED(.Lcleanup_io_restore_insn)
- jhe 0f
- l %r9,12(%r11) # get saved r11 pointer to pt_regs
- mvc __LC_RETURN_PSW(8),__PT_PSW(%r9)
- mvc 0(32,%r11),__PT_R8(%r9)
- lm %r0,%r7,__PT_R0(%r9)
-0: lm %r8,%r9,__LC_RETURN_PSW
+ clg %r9,BASED(.Lcleanup_io_restore_insn)
+ je 0f
+ lg %r9,24(%r11) # get saved r11 pointer to pt_regs
+ mvc __LC_RETURN_PSW(16),__PT_PSW(%r9)
+ mvc 0(64,%r11),__PT_R8(%r9)
+ lmg %r0,%r7,__PT_R0(%r9)
+0: lmg %r8,%r9,__LC_RETURN_PSW
br %r14
.Lcleanup_io_restore_insn:
- .long .Lio_done - 4 + 0x80000000
+ .quad .Lio_done - 4
.Lcleanup_idle:
# copy interrupt clock & cpu timer
mvc __CLOCK_IDLE_EXIT(8,%r2),__LC_INT_CLOCK
mvc __TIMER_IDLE_EXIT(8,%r2),__LC_ASYNC_ENTER_TIMER
- chi %r11,__LC_SAVE_AREA_ASYNC
+ cghi %r11,__LC_SAVE_AREA_ASYNC
je 0f
mvc __CLOCK_IDLE_EXIT(8,%r2),__LC_MCCK_CLOCK
mvc __TIMER_IDLE_EXIT(8,%r2),__LC_MCCK_ENTER_TIMER
-0: # check if stck has been executed
- cl %r9,BASED(.Lcleanup_idle_insn)
+0: # check if stck & stpt have been executed
+ clg %r9,BASED(.Lcleanup_idle_insn)
jhe 1f
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(%r2)
1: # account system time going idle
- lm %r9,%r10,__LC_STEAL_TIMER
- ADD64 %r9,%r10,__CLOCK_IDLE_ENTER(%r2)
- SUB64 %r9,%r10,__LC_LAST_UPDATE_CLOCK
- stm %r9,%r10,__LC_STEAL_TIMER
+ lg %r9,__LC_STEAL_TIMER
+ alg %r9,__CLOCK_IDLE_ENTER(%r2)
+ slg %r9,__LC_LAST_UPDATE_CLOCK
+ stg %r9,__LC_STEAL_TIMER
mvc __LC_LAST_UPDATE_CLOCK(8),__CLOCK_IDLE_EXIT(%r2)
- lm %r9,%r10,__LC_SYSTEM_TIMER
- ADD64 %r9,%r10,__LC_LAST_UPDATE_TIMER
- SUB64 %r9,%r10,__TIMER_IDLE_ENTER(%r2)
- stm %r9,%r10,__LC_SYSTEM_TIMER
+ lg %r9,__LC_SYSTEM_TIMER
+ alg %r9,__LC_LAST_UPDATE_TIMER
+ slg %r9,__TIMER_IDLE_ENTER(%r2)
+ stg %r9,__LC_SYSTEM_TIMER
mvc __LC_LAST_UPDATE_TIMER(8),__TIMER_IDLE_EXIT(%r2)
# prepare return psw
- n %r8,BASED(.Lcleanup_idle_wait) # clear irq & wait state bits
- l %r9,24(%r11) # return from psw_idle
+ nihh %r8,0xfcfd # clear irq & wait state bits
+ lg %r9,48(%r11) # return from psw_idle
br %r14
.Lcleanup_idle_insn:
- .long .Lpsw_idle_lpsw + 0x80000000
-.Lcleanup_idle_wait:
- .long 0xfcfdffff
+ .quad .Lpsw_idle_lpsw
/*
* Integer constants
*/
- .align 4
-.Lnr_syscalls:
- .long NR_syscalls
-.Lvtimer_max:
- .quad 0x7fffffffffffffff
+ .align 8
+.Lcritical_start:
+ .quad .L__critical_start
+.Lcritical_length:
+ .quad .L__critical_end - .L__critical_start
+
+#if IS_ENABLED(CONFIG_KVM)
/*
- * Symbol constants
+ * sie64a calling convention:
+ * %r2 pointer to sie control block
+ * %r3 guest register save area
*/
-.Lc_do_machine_check: .long s390_do_machine_check
-.Lc_handle_mcck: .long s390_handle_mcck
-.Lc_do_IRQ: .long do_IRQ
-.Lc_do_signal: .long do_signal
-.Lc_do_notify_resume: .long do_notify_resume
-.Lc_do_per_trap: .long do_per_trap
-.Lc_jump_table: .long pgm_check_table
-.Lc_schedule: .long schedule
-#ifdef CONFIG_PREEMPT
-.Lc_preempt_irq: .long preempt_schedule_irq
-#endif
-.Lc_trace_enter: .long do_syscall_trace_enter
-.Lc_trace_exit: .long do_syscall_trace_exit
-.Lc_schedule_tail: .long schedule_tail
-.Lc_sysc_per: .long .Lsysc_per + 0x80000000
-#ifdef CONFIG_TRACE_IRQFLAGS
-.Lc_hardirqs_on: .long trace_hardirqs_on_caller
-.Lc_hardirqs_off: .long trace_hardirqs_off_caller
-#endif
-#ifdef CONFIG_LOCKDEP
-.Lc_lockdep_sys_exit: .long lockdep_sys_exit
+ENTRY(sie64a)
+ stmg %r6,%r14,__SF_GPRS(%r15) # save kernel registers
+ stg %r2,__SF_EMPTY(%r15) # save control block pointer
+ stg %r3,__SF_EMPTY+8(%r15) # save guest register save area
+ xc __SF_EMPTY+16(16,%r15),__SF_EMPTY+16(%r15) # host id & reason
+ lmg %r0,%r13,0(%r3) # load guest gprs 0-13
+ lg %r14,__LC_GMAP # get gmap pointer
+ ltgr %r14,%r14
+ jz .Lsie_gmap
+ lctlg %c1,%c1,__GMAP_ASCE(%r14) # load primary asce
+.Lsie_gmap:
+ lg %r14,__SF_EMPTY(%r15) # get control block pointer
+ oi __SIE_PROG0C+3(%r14),1 # we are going into SIE now
+ tm __SIE_PROG20+3(%r14),1 # last exit...
+ jnz .Lsie_done
+ LPP __SF_EMPTY(%r15) # set guest id
+ sie 0(%r14)
+.Lsie_done:
+ LPP __SF_EMPTY+16(%r15) # set host id
+ ni __SIE_PROG0C+3(%r14),0xfe # no longer in SIE
+ lctlg %c1,%c1,__LC_USER_ASCE # load primary asce
+# 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
+# instructions between sie64a and .Lsie_done should not cause program
+# interrupts. So lets use a nop (47 00 00 00) as a landing pad.
+# See also HANDLE_SIE_INTERCEPT
+.Lrewind_pad:
+ nop 0
+ .globl sie_exit
+sie_exit:
+ lg %r14,__SF_EMPTY+8(%r15) # load guest register save area
+ stmg %r0,%r13,0(%r14) # save guest gprs 0-13
+ lmg %r6,%r14,__SF_GPRS(%r15) # restore kernel registers
+ lg %r2,__SF_EMPTY+24(%r15) # return exit reason code
+ br %r14
+.Lsie_fault:
+ lghi %r14,-EFAULT
+ stg %r14,__SF_EMPTY+24(%r15) # set exit reason code
+ j sie_exit
+
+ .align 8
+.Lsie_critical:
+ .quad .Lsie_gmap
+.Lsie_critical_length:
+ .quad .Lsie_done - .Lsie_gmap
+
+ EX_TABLE(.Lrewind_pad,.Lsie_fault)
+ EX_TABLE(sie_exit,.Lsie_fault)
#endif
-.Lc_critical_start: .long .L__critical_start + 0x80000000
-.Lc_critical_length: .long .L__critical_end - .L__critical_start
- .section .rodata, "a"
-#define SYSCALL(esa,esame,emu) .long esa
+ .section .rodata, "a"
+#define SYSCALL(esame,emu) .long esame
.globl sys_call_table
sys_call_table:
#include "syscalls.S"
#undef SYSCALL
+
+#ifdef CONFIG_COMPAT
+
+#define SYSCALL(esame,emu) .long emu
+ .globl sys_call_table_emu
+sys_call_table_emu:
+#include "syscalls.S"
+#undef SYSCALL
+#endif