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-rw-r--r--arch/s390/kernel/asm-offsets.c6
-rw-r--r--arch/s390/kernel/debug.c1
-rw-r--r--arch/s390/kernel/early.c4
-rw-r--r--arch/s390/kernel/entry.S324
-rw-r--r--arch/s390/kernel/entry64.S617
-rw-r--r--arch/s390/kernel/head.S4
-rw-r--r--arch/s390/kernel/head31.S2
-rw-r--r--arch/s390/kernel/head64.S2
-rw-r--r--arch/s390/kernel/nmi.c3
-rw-r--r--arch/s390/kernel/processor.c37
-rw-r--r--arch/s390/kernel/ptrace.c73
-rw-r--r--arch/s390/kernel/s390_ext.c3
-rw-r--r--arch/s390/kernel/setup.c27
-rw-r--r--arch/s390/kernel/signal.c2
-rw-r--r--arch/s390/kernel/time.c1
-rw-r--r--arch/s390/kernel/topology.c7
-rw-r--r--arch/s390/kernel/traps.c31
-rw-r--r--arch/s390/kernel/vdso.c4
-rw-r--r--arch/s390/kernel/vtime.c15
19 files changed, 584 insertions, 579 deletions
diff --git a/arch/s390/kernel/asm-offsets.c b/arch/s390/kernel/asm-offsets.c
index a09408952ed0..d9b490a2716e 100644
--- a/arch/s390/kernel/asm-offsets.c
+++ b/arch/s390/kernel/asm-offsets.c
@@ -39,6 +39,7 @@ int main(void)
DEFINE(__TI_precount, offsetof(struct thread_info, preempt_count));
DEFINE(__TI_user_timer, offsetof(struct thread_info, user_timer));
DEFINE(__TI_system_timer, offsetof(struct thread_info, system_timer));
+ DEFINE(__TI_last_break, offsetof(struct thread_info, last_break));
BLANK();
DEFINE(__PT_ARGS, offsetof(struct pt_regs, args));
DEFINE(__PT_PSW, offsetof(struct pt_regs, psw));
@@ -112,6 +113,7 @@ int main(void)
DEFINE(__LC_RETURN_MCCK_PSW, offsetof(struct _lowcore, return_mcck_psw));
DEFINE(__LC_SYNC_ENTER_TIMER, offsetof(struct _lowcore, sync_enter_timer));
DEFINE(__LC_ASYNC_ENTER_TIMER, offsetof(struct _lowcore, async_enter_timer));
+ DEFINE(__LC_MCCK_ENTER_TIMER, offsetof(struct _lowcore, mcck_enter_timer));
DEFINE(__LC_EXIT_TIMER, offsetof(struct _lowcore, exit_timer));
DEFINE(__LC_USER_TIMER, offsetof(struct _lowcore, user_timer));
DEFINE(__LC_SYSTEM_TIMER, offsetof(struct _lowcore, system_timer));
@@ -126,10 +128,12 @@ int main(void)
DEFINE(__LC_KERNEL_ASCE, offsetof(struct _lowcore, kernel_asce));
DEFINE(__LC_USER_ASCE, offsetof(struct _lowcore, user_asce));
DEFINE(__LC_USER_EXEC_ASCE, offsetof(struct _lowcore, user_exec_asce));
- DEFINE(__LC_CPUID, offsetof(struct _lowcore, cpu_id));
DEFINE(__LC_INT_CLOCK, offsetof(struct _lowcore, int_clock));
+ DEFINE(__LC_MCCK_CLOCK, offsetof(struct _lowcore, mcck_clock));
DEFINE(__LC_MACHINE_FLAGS, offsetof(struct _lowcore, machine_flags));
DEFINE(__LC_FTRACE_FUNC, offsetof(struct _lowcore, ftrace_func));
+ DEFINE(__LC_SIE_HOOK, offsetof(struct _lowcore, sie_hook));
+ DEFINE(__LC_CMF_HPP, offsetof(struct _lowcore, cmf_hpp));
DEFINE(__LC_IRB, offsetof(struct _lowcore, irb));
DEFINE(__LC_CPU_TIMER_SAVE_AREA, offsetof(struct _lowcore, cpu_timer_save_area));
DEFINE(__LC_CLOCK_COMP_SAVE_AREA, offsetof(struct _lowcore, clock_comp_save_area));
diff --git a/arch/s390/kernel/debug.c b/arch/s390/kernel/debug.c
index 0168472b2fdf..98192261491d 100644
--- a/arch/s390/kernel/debug.c
+++ b/arch/s390/kernel/debug.c
@@ -655,6 +655,7 @@ found:
p_info->act_entry_offset = 0;
file->private_data = p_info;
debug_info_get(debug_info);
+ nonseekable_open(inode, file);
out:
mutex_unlock(&debug_mutex);
return rc;
diff --git a/arch/s390/kernel/early.c b/arch/s390/kernel/early.c
index 2d92c2cf92d7..c00856ad4e5a 100644
--- a/arch/s390/kernel/early.c
+++ b/arch/s390/kernel/early.c
@@ -356,6 +356,7 @@ static __init void detect_machine_facilities(void)
{
#ifdef CONFIG_64BIT
unsigned int facilities;
+ unsigned long long facility_bits;
facilities = stfl();
if (facilities & (1 << 28))
@@ -364,6 +365,9 @@ static __init void detect_machine_facilities(void)
S390_lowcore.machine_flags |= MACHINE_FLAG_PFMF;
if (facilities & (1 << 4))
S390_lowcore.machine_flags |= MACHINE_FLAG_MVCOS;
+ if ((stfle(&facility_bits, 1) > 0) &&
+ (facility_bits & (1ULL << (63 - 40))))
+ S390_lowcore.machine_flags |= MACHINE_FLAG_SPP;
#endif
}
diff --git a/arch/s390/kernel/entry.S b/arch/s390/kernel/entry.S
index 6af7045280a8..d5e3e6007447 100644
--- a/arch/s390/kernel/entry.S
+++ b/arch/s390/kernel/entry.S
@@ -73,21 +73,24 @@ STACK_SIZE = 1 << STACK_SHIFT
basr %r14,%r1
.endm
- .macro TRACE_IRQS_CHECK
- basr %r2,%r0
+ .macro TRACE_IRQS_CHECK_ON
tm SP_PSW(%r15),0x03 # irqs enabled?
- jz 0f
- l %r1,BASED(.Ltrace_irq_on_caller)
- basr %r14,%r1
- j 1f
-0: l %r1,BASED(.Ltrace_irq_off_caller)
- basr %r14,%r1
-1:
+ bz BASED(0f)
+ TRACE_IRQS_ON
+0:
+ .endm
+
+ .macro TRACE_IRQS_CHECK_OFF
+ tm SP_PSW(%r15),0x03 # irqs enabled?
+ bz BASED(0f)
+ TRACE_IRQS_OFF
+0:
.endm
#else
#define TRACE_IRQS_ON
#define TRACE_IRQS_OFF
-#define TRACE_IRQS_CHECK
+#define TRACE_IRQS_CHECK_ON
+#define TRACE_IRQS_CHECK_OFF
#endif
#ifdef CONFIG_LOCKDEP
@@ -177,9 +180,9 @@ STACK_SIZE = 1 << STACK_SHIFT
s %r15,BASED(.Lc_spsize) # make room for registers & psw
mvc SP_PSW(8,%r15),0(%r12) # move user PSW to stack
st %r2,SP_ORIG_R2(%r15) # store original content of gpr 2
- icm %r12,3,__LC_SVC_ILC
+ icm %r12,12,__LC_SVC_ILC
stm %r0,%r11,SP_R0(%r15) # store gprs %r0-%r11 to kernel stack
- st %r12,SP_SVCNR(%r15)
+ st %r12,SP_ILC(%r15)
mvc SP_R12(16,%r15),\savearea # move %r12-%r15 to stack
la %r12,0
st %r12,__SF_BACKCHAIN(%r15) # clear back chain
@@ -273,66 +276,45 @@ sysc_do_restart:
st %r2,SP_R2(%r15) # store return value (change R2 on stack)
sysc_return:
+ LOCKDEP_SYS_EXIT
+sysc_tif:
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_addr)
- l %r1,0(%r1)
- 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
-sysc_restore_trace_psw_addr:
- .long sysc_restore_trace_psw
-
- .section .data,"aw",@progbits
- .align 8
- .globl sysc_restore_trace_psw
-sysc_restore_trace_psw:
- .long 0, sysc_restore_trace + 0x80000000
- .previous
-#endif
-
-#
-# recheck if there is more work to do
#
-sysc_work_loop:
- tm __TI_flags+3(%r9),_TIF_WORK_SVC
- bz BASED(sysc_restore) # there is no work to do
-#
-# One of the work bits is on. Find out which one.
+# There is work to do, but first we need to check if we return to userspace.
#
sysc_work:
tm SP_PSW+1(%r15),0x01 # returning to user ?
bno BASED(sysc_restore)
+
+#
+# One of the work bits is on. Find out which one.
+#
+sysc_work_tif:
tm __TI_flags+3(%r9),_TIF_MCCK_PENDING
bo BASED(sysc_mcck_pending)
tm __TI_flags+3(%r9),_TIF_NEED_RESCHED
bo BASED(sysc_reschedule)
tm __TI_flags+3(%r9),_TIF_SIGPENDING
- bnz BASED(sysc_sigpending)
+ bo BASED(sysc_sigpending)
tm __TI_flags+3(%r9),_TIF_NOTIFY_RESUME
- bnz BASED(sysc_notify_resume)
+ bo BASED(sysc_notify_resume)
tm __TI_flags+3(%r9),_TIF_RESTART_SVC
bo BASED(sysc_restart)
tm __TI_flags+3(%r9),_TIF_SINGLE_STEP
bo BASED(sysc_singlestep)
- b BASED(sysc_restore)
-sysc_work_done:
+ b BASED(sysc_return) # beware of critical section cleanup
#
# _TIF_NEED_RESCHED is set, call schedule
#
sysc_reschedule:
l %r1,BASED(.Lschedule)
- la %r14,BASED(sysc_work_loop)
+ la %r14,BASED(sysc_return)
br %r1 # call scheduler
#
@@ -340,7 +322,7 @@ sysc_reschedule:
#
sysc_mcck_pending:
l %r1,BASED(.Ls390_handle_mcck)
- la %r14,BASED(sysc_work_loop)
+ la %r14,BASED(sysc_return)
br %r1 # TIF bit will be cleared by handler
#
@@ -355,7 +337,7 @@ sysc_sigpending:
bo BASED(sysc_restart)
tm __TI_flags+3(%r9),_TIF_SINGLE_STEP
bo BASED(sysc_singlestep)
- b BASED(sysc_work_loop)
+ b BASED(sysc_return)
#
# _TIF_NOTIFY_RESUME is set, call do_notify_resume
@@ -363,7 +345,7 @@ sysc_sigpending:
sysc_notify_resume:
la %r2,SP_PTREGS(%r15) # load pt_regs
l %r1,BASED(.Ldo_notify_resume)
- la %r14,BASED(sysc_work_loop)
+ la %r14,BASED(sysc_return)
br %r1 # call do_notify_resume
@@ -458,11 +440,13 @@ kernel_execve:
br %r14
# execve succeeded.
0: stnsm __SF_EMPTY(%r15),0xfc # disable interrupts
+ TRACE_IRQS_OFF
l %r15,__LC_KERNEL_STACK # load ksp
s %r15,BASED(.Lc_spsize) # make room for registers & psw
l %r9,__LC_THREAD_INFO
mvc SP_PTREGS(__PT_SIZE,%r15),0(%r12) # copy pt_regs
xc __SF_BACKCHAIN(4,%r15),__SF_BACKCHAIN(%r15)
+ TRACE_IRQS_ON
stosm __SF_EMPTY(%r15),0x03 # reenable interrupts
l %r1,BASED(.Lexecve_tail)
basr %r14,%r1
@@ -499,8 +483,8 @@ pgm_check_handler:
UPDATE_VTIME __LC_LAST_UPDATE_TIMER,__LC_EXIT_TIMER,__LC_SYSTEM_TIMER
mvc __LC_LAST_UPDATE_TIMER(8),__LC_SYNC_ENTER_TIMER
pgm_no_vtime:
+ TRACE_IRQS_CHECK_OFF
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
@@ -509,8 +493,10 @@ pgm_do_call:
sll %r8,2
l %r7,0(%r8,%r7) # load address of handler routine
la %r2,SP_PTREGS(%r15) # address of register-save area
- la %r14,BASED(sysc_return)
- br %r7 # branch to interrupt-handler
+ basr %r14,%r7 # branch to interrupt-handler
+pgm_exit:
+ TRACE_IRQS_CHECK_ON
+ b BASED(sysc_return)
#
# handle per exception
@@ -537,19 +523,19 @@ pgm_per_std:
UPDATE_VTIME __LC_LAST_UPDATE_TIMER,__LC_EXIT_TIMER,__LC_SYSTEM_TIMER
mvc __LC_LAST_UPDATE_TIMER(8),__LC_SYNC_ENTER_TIMER
pgm_no_vtime2:
+ TRACE_IRQS_CHECK_OFF
l %r9,__LC_THREAD_INFO # load pointer to thread_info struct
- TRACE_IRQS_OFF
l %r1,__TI_task(%r9)
+ tm SP_PSW+1(%r15),0x01 # kernel per event ?
+ bz BASED(kernel_per)
mvc __THREAD_per+__PER_atmid(2,%r1),__LC_PER_ATMID
mvc __THREAD_per+__PER_address(4,%r1),__LC_PER_ADDRESS
mvc __THREAD_per+__PER_access_id(1,%r1),__LC_PER_ACCESS_ID
oi __TI_flags+3(%r9),_TIF_SINGLE_STEP # set TIF_SINGLE_STEP
- tm SP_PSW+1(%r15),0x01 # kernel per event ?
- bz BASED(kernel_per)
l %r3,__LC_PGM_ILC # load program interruption code
la %r8,0x7f
nr %r8,%r3 # clear per-event-bit and ilc
- be BASED(sysc_return) # only per or per+check ?
+ be BASED(pgm_exit) # only per or per+check ?
b BASED(pgm_do_call)
#
@@ -570,8 +556,8 @@ pgm_svcper:
mvc __THREAD_per+__PER_access_id(1,%r8),__LC_PER_ACCESS_ID
oi __TI_flags+3(%r9),_TIF_SINGLE_STEP # set TIF_SINGLE_STEP
TRACE_IRQS_ON
- lm %r2,%r6,SP_R2(%r15) # load svc arguments
stosm __SF_EMPTY(%r15),0x03 # reenable interrupts
+ lm %r2,%r6,SP_R2(%r15) # load svc arguments
b BASED(sysc_do_svc)
#
@@ -582,8 +568,8 @@ kernel_per:
mvi SP_SVCNR+1(%r15),0xff
la %r2,SP_PTREGS(%r15) # address of register-save area
l %r1,BASED(.Lhandle_per) # load adr. of per handler
- la %r14,BASED(sysc_restore)# load adr. of system return
- br %r1 # branch to do_single_step
+ basr %r14,%r1 # branch to do_single_step
+ b BASED(pgm_exit)
/*
* IO interrupt handler routine
@@ -602,134 +588,126 @@ io_int_handler:
UPDATE_VTIME __LC_LAST_UPDATE_TIMER,__LC_EXIT_TIMER,__LC_SYSTEM_TIMER
mvc __LC_LAST_UPDATE_TIMER(8),__LC_ASYNC_ENTER_TIMER
io_no_vtime:
- l %r9,__LC_THREAD_INFO # load pointer to thread_info struct
TRACE_IRQS_OFF
+ l %r9,__LC_THREAD_INFO # load pointer to thread_info struct
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
io_return:
+ LOCKDEP_SYS_EXIT
+ TRACE_IRQS_ON
+io_tif:
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_addr)
- l %r1,0(%r1)
- 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
-io_restore_trace_psw_addr:
- .long io_restore_trace_psw
-
- .section .data,"aw",@progbits
- .align 8
- .globl io_restore_trace_psw
-io_restore_trace_psw:
- .long 0, io_restore_trace + 0x80000000
- .previous
-#endif
-
#
-# switch to kernel stack, then check the TIF bits
+# 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
+# 2) 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.
#
io_work:
tm SP_PSW+1(%r15),0x01 # returning to user ?
-#ifndef CONFIG_PREEMPT
- bno BASED(io_restore) # no-> skip resched & signal
-#else
- bnz BASED(io_work_user) # no -> check for preemptive scheduling
+ bo BASED(io_work_user) # yes -> do resched & signal
+#ifdef CONFIG_PREEMPT
# check for preemptive scheduling
icm %r0,15,__TI_precount(%r9)
bnz BASED(io_restore) # preemption disabled
+ tm __TI_flags+3(%r9),_TIF_NEED_RESCHED
+ bno BASED(io_restore)
+ # switch to kernel stack
l %r1,SP_R15(%r15)
s %r1,BASED(.Lc_spsize)
mvc SP_PTREGS(__PT_SIZE,%r1),SP_PTREGS(%r15)
xc __SF_BACKCHAIN(4,%r1),__SF_BACKCHAIN(%r1) # clear back chain
lr %r15,%r1
-io_resume_loop:
- tm __TI_flags+3(%r9),_TIF_NEED_RESCHED
- bno BASED(io_restore)
+ # TRACE_IRQS_ON already done at io_return, call
+ # TRACE_IRQS_OFF to keep things symmetrical
+ TRACE_IRQS_OFF
l %r1,BASED(.Lpreempt_schedule_irq)
- la %r14,BASED(io_resume_loop)
- br %r1 # call schedule
+ basr %r14,%r1 # call preempt_schedule_irq
+ b BASED(io_return)
+#else
+ b BASED(io_restore)
#endif
+#
+# Need to do work before returning to userspace, switch to kernel stack
+#
io_work_user:
l %r1,__LC_KERNEL_STACK
s %r1,BASED(.Lc_spsize)
mvc SP_PTREGS(__PT_SIZE,%r1),SP_PTREGS(%r15)
xc __SF_BACKCHAIN(4,%r1),__SF_BACKCHAIN(%r1) # clear back chain
lr %r15,%r1
+
#
# One of the work bits is on. Find out which one.
-# Checked are: _TIF_SIGPENDING, _TIF_NEED_RESCHED
+# Checked are: _TIF_SIGPENDING, _TIF_NOTIFY_RESUME, _TIF_NEED_RESCHED
# and _TIF_MCCK_PENDING
#
-io_work_loop:
+io_work_tif:
tm __TI_flags+3(%r9),_TIF_MCCK_PENDING
bo BASED(io_mcck_pending)
tm __TI_flags+3(%r9),_TIF_NEED_RESCHED
bo BASED(io_reschedule)
tm __TI_flags+3(%r9),_TIF_SIGPENDING
- bnz BASED(io_sigpending)
+ bo BASED(io_sigpending)
tm __TI_flags+3(%r9),_TIF_NOTIFY_RESUME
- bnz BASED(io_notify_resume)
- b BASED(io_restore)
-io_work_done:
+ bo BASED(io_notify_resume)
+ b BASED(io_return) # beware of critical section cleanup
#
# _TIF_MCCK_PENDING is set, call handler
#
io_mcck_pending:
+ # TRACE_IRQS_ON already done at io_return
l %r1,BASED(.Ls390_handle_mcck)
basr %r14,%r1 # TIF bit will be cleared by handler
- b BASED(io_work_loop)
+ TRACE_IRQS_OFF
+ b BASED(io_return)
#
# _TIF_NEED_RESCHED is set, call schedule
#
io_reschedule:
- TRACE_IRQS_ON
+ # TRACE_IRQS_ON already done at io_return
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_restore) # there is no work to do
- b BASED(io_work_loop)
+ b BASED(io_return)
#
# _TIF_SIGPENDING is set, call do_signal
#
io_sigpending:
- TRACE_IRQS_ON
+ # TRACE_IRQS_ON already done at io_return
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)
+ b BASED(io_return)
#
# _TIF_SIGPENDING is set, call do_signal
#
io_notify_resume:
- TRACE_IRQS_ON
+ # TRACE_IRQS_ON already done at io_return
stosm __SF_EMPTY(%r15),0x03 # reenable interrupts
la %r2,SP_PTREGS(%r15) # load pt_regs
l %r1,BASED(.Ldo_notify_resume)
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)
+ b BASED(io_return)
/*
* External interrupt handler routine
@@ -764,15 +742,14 @@ __critical_end:
.globl mcck_int_handler
mcck_int_handler:
- stck __LC_INT_CLOCK
+ stck __LC_MCCK_CLOCK
spt __LC_CPU_TIMER_SAVE_AREA # revalidate cpu timer
lm %r0,%r15,__LC_GPREGS_SAVE_AREA # revalidate gprs
SAVE_ALL_BASE __LC_SAVE_AREA+32
la %r12,__LC_MCK_OLD_PSW
tm __LC_MCCK_CODE,0x80 # system damage?
bo BASED(mcck_int_main) # yes -> rest of mcck code invalid
- mvc __LC_SAVE_AREA+52(8),__LC_ASYNC_ENTER_TIMER
- mvc __LC_ASYNC_ENTER_TIMER(8),__LC_CPU_TIMER_SAVE_AREA
+ mvc __LC_MCCK_ENTER_TIMER(8),__LC_CPU_TIMER_SAVE_AREA
tm __LC_MCCK_CODE+5,0x02 # stored cpu timer value valid?
bo BASED(1f)
la %r14,__LC_SYNC_ENTER_TIMER
@@ -786,7 +763,7 @@ mcck_int_handler:
bl BASED(0f)
la %r14,__LC_LAST_UPDATE_TIMER
0: spt 0(%r14)
- mvc __LC_ASYNC_ENTER_TIMER(8),0(%r14)
+ mvc __LC_MCCK_ENTER_TIMER(8),0(%r14)
1: tm __LC_MCCK_CODE+2,0x09 # mwp + ia of old psw valid?
bno BASED(mcck_int_main) # no -> skip cleanup critical
tm __LC_MCK_OLD_PSW+1,0x01 # test problem state bit
@@ -808,9 +785,9 @@ mcck_int_main:
bno BASED(mcck_no_vtime) # no -> skip cleanup critical
tm SP_PSW+1(%r15),0x01 # interrupting from user ?
bz BASED(mcck_no_vtime)
- UPDATE_VTIME __LC_EXIT_TIMER,__LC_ASYNC_ENTER_TIMER,__LC_USER_TIMER
+ UPDATE_VTIME __LC_EXIT_TIMER,__LC_MCCK_ENTER_TIMER,__LC_USER_TIMER
UPDATE_VTIME __LC_LAST_UPDATE_TIMER,__LC_EXIT_TIMER,__LC_SYSTEM_TIMER
- mvc __LC_LAST_UPDATE_TIMER(8),__LC_ASYNC_ENTER_TIMER
+ mvc __LC_LAST_UPDATE_TIMER(8),__LC_MCCK_ENTER_TIMER
mcck_no_vtime:
l %r9,__LC_THREAD_INFO # load pointer to thread_info struct
la %r2,SP_PTREGS(%r15) # load pt_regs
@@ -833,7 +810,6 @@ mcck_no_vtime:
mcck_return:
mvc __LC_RETURN_MCCK_PSW(8),SP_PSW(%r15) # move return PSW
ni __LC_RETURN_MCCK_PSW+1,0xfd # clear wait state bit
- mvc __LC_ASYNC_ENTER_TIMER(8),__LC_SAVE_AREA+52
tm __LC_RETURN_MCCK_PSW+1,0x01 # returning to user ?
bno BASED(0f)
lm %r0,%r15,SP_R0(%r15) # load gprs 0-15
@@ -917,18 +893,14 @@ stack_overflow:
cleanup_table_system_call:
.long system_call + 0x80000000, sysc_do_svc + 0x80000000
-cleanup_table_sysc_return:
- .long sysc_return + 0x80000000, sysc_leave + 0x80000000
-cleanup_table_sysc_leave:
- .long sysc_leave + 0x80000000, sysc_done + 0x80000000
-cleanup_table_sysc_work_loop:
- .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_work_done + 0x80000000
+cleanup_table_sysc_tif:
+ .long sysc_tif + 0x80000000, sysc_restore + 0x80000000
+cleanup_table_sysc_restore:
+ .long sysc_restore + 0x80000000, sysc_done + 0x80000000
+cleanup_table_io_tif:
+ .long io_tif + 0x80000000, io_restore + 0x80000000
+cleanup_table_io_restore:
+ .long io_restore + 0x80000000, io_done + 0x80000000
cleanup_critical:
clc 4(4,%r12),BASED(cleanup_table_system_call)
@@ -936,49 +908,40 @@ cleanup_critical:
clc 4(4,%r12),BASED(cleanup_table_system_call+4)
bl BASED(cleanup_system_call)
0:
- clc 4(4,%r12),BASED(cleanup_table_sysc_return)
- bl BASED(0f)
- clc 4(4,%r12),BASED(cleanup_table_sysc_return+4)
- bl BASED(cleanup_sysc_return)
-0:
- clc 4(4,%r12),BASED(cleanup_table_sysc_leave)
- bl BASED(0f)
- clc 4(4,%r12),BASED(cleanup_table_sysc_leave+4)
- bl BASED(cleanup_sysc_leave)
-0:
- clc 4(4,%r12),BASED(cleanup_table_sysc_work_loop)
+ clc 4(4,%r12),BASED(cleanup_table_sysc_tif)
bl BASED(0f)
- clc 4(4,%r12),BASED(cleanup_table_sysc_work_loop+4)
- bl BASED(cleanup_sysc_return)
+ clc 4(4,%r12),BASED(cleanup_table_sysc_tif+4)
+ bl BASED(cleanup_sysc_tif)
0:
- clc 4(4,%r12),BASED(cleanup_table_io_return)
+ clc 4(4,%r12),BASED(cleanup_table_sysc_restore)
bl BASED(0f)
- clc 4(4,%r12),BASED(cleanup_table_io_return+4)
- bl BASED(cleanup_io_return)
+ clc 4(4,%r12),BASED(cleanup_table_sysc_restore+4)
+ bl BASED(cleanup_sysc_restore)
0:
- clc 4(4,%r12),BASED(cleanup_table_io_leave)
+ clc 4(4,%r12),BASED(cleanup_table_io_tif)
bl BASED(0f)
- clc 4(4,%r12),BASED(cleanup_table_io_leave+4)
- bl BASED(cleanup_io_leave)
+ clc 4(4,%r12),BASED(cleanup_table_io_tif+4)
+ bl BASED(cleanup_io_tif)
0:
- clc 4(4,%r12),BASED(cleanup_table_io_work_loop)
+ clc 4(4,%r12),BASED(cleanup_table_io_restore)
bl BASED(0f)
- clc 4(4,%r12),BASED(cleanup_table_io_work_loop+4)
- bl BASED(cleanup_io_work_loop)
+ clc 4(4,%r12),BASED(cleanup_table_io_restore+4)
+ bl BASED(cleanup_io_restore)
0:
br %r14
cleanup_system_call:
mvc __LC_RETURN_PSW(8),0(%r12)
- c %r12,BASED(.Lmck_old_psw)
- be BASED(0f)
- la %r12,__LC_SAVE_AREA+16
- b BASED(1f)
-0: la %r12,__LC_SAVE_AREA+32
-1:
clc __LC_RETURN_PSW+4(4),BASED(cleanup_system_call_insn+4)
bh BASED(0f)
+ mvc __LC_SYNC_ENTER_TIMER(8),__LC_MCCK_ENTER_TIMER
+ c %r12,BASED(.Lmck_old_psw)
+ be BASED(0f)
mvc __LC_SYNC_ENTER_TIMER(8),__LC_ASYNC_ENTER_TIMER
+0: c %r12,BASED(.Lmck_old_psw)
+ la %r12,__LC_SAVE_AREA+32
+ be BASED(0f)
+ la %r12,__LC_SAVE_AREA+16
0: clc __LC_RETURN_PSW+4(4),BASED(cleanup_system_call_insn+8)
bhe BASED(cleanup_vtime)
clc __LC_RETURN_PSW+4(4),BASED(cleanup_system_call_insn)
@@ -1011,61 +974,54 @@ cleanup_system_call_insn:
.long sysc_stime + 0x80000000
.long sysc_update + 0x80000000
-cleanup_sysc_return:
+cleanup_sysc_tif:
mvc __LC_RETURN_PSW(4),0(%r12)
- mvc __LC_RETURN_PSW+4(4),BASED(cleanup_table_sysc_return)
+ mvc __LC_RETURN_PSW+4(4),BASED(cleanup_table_sysc_tif)
la %r12,__LC_RETURN_PSW
br %r14
-cleanup_sysc_leave:
- clc 4(4,%r12),BASED(cleanup_sysc_leave_insn)
+cleanup_sysc_restore:
+ clc 4(4,%r12),BASED(cleanup_sysc_restore_insn)
be BASED(2f)
+ mvc __LC_EXIT_TIMER(8),__LC_MCCK_ENTER_TIMER
+ c %r12,BASED(.Lmck_old_psw)
+ be BASED(0f)
mvc __LC_EXIT_TIMER(8),__LC_ASYNC_ENTER_TIMER
- clc 4(4,%r12),BASED(cleanup_sysc_leave_insn+4)
+0: clc 4(4,%r12),BASED(cleanup_sysc_restore_insn+4)
be BASED(2f)
mvc __LC_RETURN_PSW(8),SP_PSW(%r15)
c %r12,BASED(.Lmck_old_psw)
- bne BASED(0f)
- mvc __LC_SAVE_AREA+32(16),SP_R12(%r15)
- b BASED(1f)
-0: mvc __LC_SAVE_AREA+16(16),SP_R12(%r15)
-1: lm %r0,%r11,SP_R0(%r15)
+ la %r12,__LC_SAVE_AREA+32
+ be BASED(1f)
+ la %r12,__LC_SAVE_AREA+16
+1: mvc 0(16,%r12),SP_R12(%r15)
+ lm %r0,%r11,SP_R0(%r15)
l %r15,SP_R15(%r15)
2: la %r12,__LC_RETURN_PSW
br %r14
-cleanup_sysc_leave_insn:
+cleanup_sysc_restore_insn:
.long sysc_done - 4 + 0x80000000
.long sysc_done - 8 + 0x80000000
-cleanup_io_return:
+cleanup_io_tif:
mvc __LC_RETURN_PSW(4),0(%r12)
- mvc __LC_RETURN_PSW+4(4),BASED(cleanup_table_io_return)
+ mvc __LC_RETURN_PSW+4(4),BASED(cleanup_table_io_tif)
la %r12,__LC_RETURN_PSW
br %r14
-cleanup_io_work_loop:
- mvc __LC_RETURN_PSW(4),0(%r12)
- mvc __LC_RETURN_PSW+4(4),BASED(cleanup_table_io_work_loop)
- la %r12,__LC_RETURN_PSW
- br %r14
-
-cleanup_io_leave:
- clc 4(4,%r12),BASED(cleanup_io_leave_insn)
- be BASED(2f)
- mvc __LC_EXIT_TIMER(8),__LC_ASYNC_ENTER_TIMER
- clc 4(4,%r12),BASED(cleanup_io_leave_insn+4)
- be BASED(2f)
+cleanup_io_restore:
+ clc 4(4,%r12),BASED(cleanup_io_restore_insn)
+ be BASED(1f)
+ mvc __LC_EXIT_TIMER(8),__LC_MCCK_ENTER_TIMER
+ clc 4(4,%r12),BASED(cleanup_io_restore_insn+4)
+ be BASED(1f)
mvc __LC_RETURN_PSW(8),SP_PSW(%r15)
- c %r12,BASED(.Lmck_old_psw)
- bne BASED(0f)
mvc __LC_SAVE_AREA+32(16),SP_R12(%r15)
- b BASED(1f)
-0: mvc __LC_SAVE_AREA+16(16),SP_R12(%r15)
-1: lm %r0,%r11,SP_R0(%r15)
+ lm %r0,%r11,SP_R0(%r15)
l %r15,SP_R15(%r15)
-2: la %r12,__LC_RETURN_PSW
+1: la %r12,__LC_RETURN_PSW
br %r14
-cleanup_io_leave_insn:
+cleanup_io_restore_insn:
.long io_done - 4 + 0x80000000
.long io_done - 8 + 0x80000000
diff --git a/arch/s390/kernel/entry64.S b/arch/s390/kernel/entry64.S
index 52106d53271c..178d92536d90 100644
--- a/arch/s390/kernel/entry64.S
+++ b/arch/s390/kernel/entry64.S
@@ -2,7 +2,7 @@
* arch/s390/kernel/entry64.S
* S390 low-level entry points.
*
- * Copyright (C) IBM Corp. 1999,2006
+ * Copyright (C) IBM Corp. 1999,2010
* Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com),
* Hartmut Penner (hp@de.ibm.com),
* Denis Joseph Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com),
@@ -59,30 +59,45 @@ _TIF_SYSCALL = (_TIF_SYSCALL_TRACE>>8 | _TIF_SYSCALL_AUDIT>>8 | \
#define BASED(name) name-system_call(%r13)
+ .macro HANDLE_SIE_INTERCEPT
+#if defined(CONFIG_KVM) || defined(CONFIG_KVM_MODULE)
+ lg %r3,__LC_SIE_HOOK
+ ltgr %r3,%r3
+ jz 0f
+ basr %r14,%r3
+ 0:
+#endif
+ .endm
+
#ifdef CONFIG_TRACE_IRQFLAGS
.macro TRACE_IRQS_ON
- basr %r2,%r0
- brasl %r14,trace_hardirqs_on_caller
+ basr %r2,%r0
+ brasl %r14,trace_hardirqs_on_caller
.endm
.macro TRACE_IRQS_OFF
- basr %r2,%r0
- brasl %r14,trace_hardirqs_off_caller
+ basr %r2,%r0
+ brasl %r14,trace_hardirqs_off_caller
.endm
- .macro TRACE_IRQS_CHECK
- basr %r2,%r0
+ .macro TRACE_IRQS_CHECK_ON
tm SP_PSW(%r15),0x03 # irqs enabled?
jz 0f
- brasl %r14,trace_hardirqs_on_caller
- j 1f
-0: brasl %r14,trace_hardirqs_off_caller
-1:
+ TRACE_IRQS_ON
+0:
+ .endm
+
+ .macro TRACE_IRQS_CHECK_OFF
+ tm SP_PSW(%r15),0x03 # irqs enabled?
+ jz 0f
+ TRACE_IRQS_OFF
+0:
.endm
#else
#define TRACE_IRQS_ON
#define TRACE_IRQS_OFF
-#define TRACE_IRQS_CHECK
+#define TRACE_IRQS_CHECK_ON
+#define TRACE_IRQS_CHECK_OFF
#endif
#ifdef CONFIG_LOCKDEP
@@ -111,31 +126,35 @@ _TIF_SYSCALL = (_TIF_SYSCALL_TRACE>>8 | _TIF_SYSCALL_AUDIT>>8 | \
* R15 - kernel stack pointer
*/
- .macro SAVE_ALL_BASE savearea
- stmg %r12,%r15,\savearea
- larl %r13,system_call
- .endm
-
.macro SAVE_ALL_SVC psworg,savearea
- la %r12,\psworg
+ stmg %r11,%r15,\savearea
lg %r15,__LC_KERNEL_STACK # problem state -> load ksp
+ aghi %r15,-SP_SIZE # make room for registers & psw
+ lg %r11,__LC_LAST_BREAK
.endm
- .macro SAVE_ALL_SYNC psworg,savearea
- la %r12,\psworg
+ .macro SAVE_ALL_PGM psworg,savearea
+ stmg %r11,%r15,\savearea
tm \psworg+1,0x01 # test problem state bit
- jz 2f # skip stack setup save
- lg %r15,__LC_KERNEL_STACK # problem state -> load ksp
#ifdef CONFIG_CHECK_STACK
- j 3f
-2: tml %r15,STACK_SIZE - CONFIG_STACK_GUARD
- jz stack_overflow
-3:
+ jnz 1f
+ tml %r15,STACK_SIZE - CONFIG_STACK_GUARD
+ jnz 2f
+ la %r12,\psworg
+ j stack_overflow
+#else
+ jz 2f
#endif
-2:
+1: lg %r15,__LC_KERNEL_STACK # problem state -> load ksp
+2: aghi %r15,-SP_SIZE # make room for registers & psw
+ larl %r13,system_call
+ lg %r11,__LC_LAST_BREAK
.endm
.macro SAVE_ALL_ASYNC psworg,savearea
+ stmg %r11,%r15,\savearea
+ larl %r13,system_call
+ lg %r11,__LC_LAST_BREAK
la %r12,\psworg
tm \psworg+1,0x01 # test problem state bit
jnz 1f # from user -> load kernel stack
@@ -149,27 +168,23 @@ _TIF_SYSCALL = (_TIF_SYSCALL_TRACE>>8 | _TIF_SYSCALL_AUDIT>>8 | \
0: lg %r14,__LC_ASYNC_STACK # are we already on the async. stack ?
slgr %r14,%r15
srag %r14,%r14,STACK_SHIFT
- jz 2f
-1: lg %r15,__LC_ASYNC_STACK # load async stack
#ifdef CONFIG_CHECK_STACK
- j 3f
-2: tml %r15,STACK_SIZE - CONFIG_STACK_GUARD
- jz stack_overflow
-3:
+ jnz 1f
+ tml %r15,STACK_SIZE - CONFIG_STACK_GUARD
+ jnz 2f
+ j stack_overflow
+#else
+ jz 2f
#endif
-2:
+1: lg %r15,__LC_ASYNC_STACK # load async stack
+2: aghi %r15,-SP_SIZE # make room for registers & psw
.endm
- .macro CREATE_STACK_FRAME psworg,savearea
- aghi %r15,-SP_SIZE # make room for registers & psw
- mvc SP_PSW(16,%r15),0(%r12) # move user PSW to stack
+ .macro CREATE_STACK_FRAME savearea
+ xc __SF_BACKCHAIN(8,%r15),__SF_BACKCHAIN(%r15)
stg %r2,SP_ORIG_R2(%r15) # store original content of gpr 2
- icm %r12,3,__LC_SVC_ILC
- stmg %r0,%r11,SP_R0(%r15) # store gprs %r0-%r11 to kernel stack
- st %r12,SP_SVCNR(%r15)
- mvc SP_R12(32,%r15),\savearea # move %r12-%r15 to stack
- la %r12,0
- stg %r12,__SF_BACKCHAIN(%r15)
+ mvc SP_R11(40,%r15),\savearea # move %r11-%r15 to stack
+ stmg %r0,%r10,SP_R0(%r15) # store gprs %r0-%r10 to kernel stack
.endm
.macro RESTORE_ALL psworg,sync
@@ -185,6 +200,13 @@ _TIF_SYSCALL = (_TIF_SYSCALL_TRACE>>8 | _TIF_SYSCALL_AUDIT>>8 | \
lpswe \psworg # back to caller
.endm
+ .macro LAST_BREAK
+ srag %r10,%r11,23
+ jz 0f
+ stg %r11,__TI_last_break(%r12)
+0:
+ .endm
+
/*
* Scheduler resume function, called by switch_to
* gpr2 = (task_struct *) prev
@@ -230,143 +252,129 @@ __critical_start:
system_call:
stpt __LC_SYNC_ENTER_TIMER
sysc_saveall:
- SAVE_ALL_BASE __LC_SAVE_AREA
SAVE_ALL_SVC __LC_SVC_OLD_PSW,__LC_SAVE_AREA
- CREATE_STACK_FRAME __LC_SVC_OLD_PSW,__LC_SAVE_AREA
- llgh %r7,__LC_SVC_INT_CODE # get svc number from lowcore
+ CREATE_STACK_FRAME __LC_SAVE_AREA
+ mvc SP_PSW(16,%r15),__LC_SVC_OLD_PSW
+ mvc SP_ILC(4,%r15),__LC_SVC_ILC
+ stg %r7,SP_ARGS(%r15)
+ lg %r12,__LC_THREAD_INFO # load pointer to thread_info struct
sysc_vtime:
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
sysc_update:
mvc __LC_LAST_UPDATE_TIMER(8),__LC_SYNC_ENTER_TIMER
+ LAST_BREAK
sysc_do_svc:
- lg %r9,__LC_THREAD_INFO # load pointer to thread_info struct
- ltgr %r7,%r7 # test for svc 0
+ llgh %r7,SP_SVCNR(%r15)
+ slag %r7,%r7,2 # shift and test for svc 0
jnz sysc_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 sysc_nr_ok
- lgfr %r7,%r1 # clear high word in r1
+ sth %r1,SP_SVCNR(%r15)
+ slag %r7,%r1,2 # shift and test for svc 0
sysc_nr_ok:
- mvc SP_ARGS(8,%r15),SP_R7(%r15)
-sysc_do_restart:
- sth %r7,SP_SVCNR(%r15)
- sllg %r7,%r7,2 # svc number * 4
larl %r10,sys_call_table
#ifdef CONFIG_COMPAT
- tm __TI_flags+5(%r9),(_TIF_31BIT>>16) # running in 31 bit mode ?
+ tm __TI_flags+5(%r12),(_TIF_31BIT>>16) # running in 31 bit mode ?
jno sysc_noemu
larl %r10,sys_call_table_emu # use 31 bit emulation system calls
sysc_noemu:
#endif
- tm __TI_flags+6(%r9),_TIF_SYSCALL
+ tm __TI_flags+6(%r12),_TIF_SYSCALL
lgf %r8,0(%r7,%r10) # load address of system call routine
jnz sysc_tracesys
basr %r14,%r8 # call sys_xxxx
stg %r2,SP_R2(%r15) # store return value (change R2 on stack)
sysc_return:
- tm __TI_flags+7(%r9),_TIF_WORK_SVC
+ LOCKDEP_SYS_EXIT
+sysc_tif:
+ tm __TI_flags+7(%r12),_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
- .section .data,"aw",@progbits
- .align 8
- .globl sysc_restore_trace_psw
-sysc_restore_trace_psw:
- .quad 0, sysc_restore_trace
- .previous
-#endif
-
-#
-# recheck if there is more work to do
#
-sysc_work_loop:
- tm __TI_flags+7(%r9),_TIF_WORK_SVC
- jz sysc_restore # there is no work to do
-#
-# One of the work bits is on. Find out which one.
+# There is work to do, but first we need to check if we return to userspace.
#
sysc_work:
tm SP_PSW+1(%r15),0x01 # returning to user ?
jno sysc_restore
- tm __TI_flags+7(%r9),_TIF_MCCK_PENDING
+
+#
+# One of the work bits is on. Find out which one.
+#
+sysc_work_tif:
+ tm __TI_flags+7(%r12),_TIF_MCCK_PENDING
jo sysc_mcck_pending
- tm __TI_flags+7(%r9),_TIF_NEED_RESCHED
+ tm __TI_flags+7(%r12),_TIF_NEED_RESCHED
jo sysc_reschedule
- tm __TI_flags+7(%r9),_TIF_SIGPENDING
- jnz sysc_sigpending
- tm __TI_flags+7(%r9),_TIF_NOTIFY_RESUME
- jnz sysc_notify_resume
- tm __TI_flags+7(%r9),_TIF_RESTART_SVC
+ 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_RESTART_SVC
jo sysc_restart
- tm __TI_flags+7(%r9),_TIF_SINGLE_STEP
+ tm __TI_flags+7(%r12),_TIF_SINGLE_STEP
jo sysc_singlestep
- j sysc_restore
-sysc_work_done:
+ j sysc_return # beware of critical section cleanup
#
# _TIF_NEED_RESCHED is set, call schedule
#
sysc_reschedule:
- larl %r14,sysc_work_loop
- jg schedule # return point is sysc_return
+ larl %r14,sysc_return
+ jg schedule # return point is sysc_return
#
# _TIF_MCCK_PENDING is set, call handler
#
sysc_mcck_pending:
- larl %r14,sysc_work_loop
+ larl %r14,sysc_return
jg s390_handle_mcck # TIF bit will be cleared by handler
#
# _TIF_SIGPENDING is set, call do_signal
#
sysc_sigpending:
- ni __TI_flags+7(%r9),255-_TIF_SINGLE_STEP # clear TIF_SINGLE_STEP
+ ni __TI_flags+7(%r12),255-_TIF_SINGLE_STEP # clear TIF_SINGLE_STEP
la %r2,SP_PTREGS(%r15) # load pt_regs
brasl %r14,do_signal # call do_signal
- tm __TI_flags+7(%r9),_TIF_RESTART_SVC
+ tm __TI_flags+7(%r12),_TIF_RESTART_SVC
jo sysc_restart
- tm __TI_flags+7(%r9),_TIF_SINGLE_STEP
+ tm __TI_flags+7(%r12),_TIF_SINGLE_STEP
jo sysc_singlestep
- j sysc_work_loop
+ j sysc_return
#
# _TIF_NOTIFY_RESUME is set, call do_notify_resume
#
sysc_notify_resume:
la %r2,SP_PTREGS(%r15) # load pt_regs
- larl %r14,sysc_work_loop
+ larl %r14,sysc_return
jg do_notify_resume # call do_notify_resume
#
# _TIF_RESTART_SVC is set, set up registers and restart svc
#
sysc_restart:
- ni __TI_flags+7(%r9),255-_TIF_RESTART_SVC # clear TIF_RESTART_SVC
+ ni __TI_flags+7(%r12),255-_TIF_RESTART_SVC # clear TIF_RESTART_SVC
lg %r7,SP_R2(%r15) # load new svc number
mvc SP_R2(8,%r15),SP_ORIG_R2(%r15) # restore first argument
lmg %r2,%r6,SP_R2(%r15) # load svc arguments
- j sysc_do_restart # restart svc
+ sth %r7,SP_SVCNR(%r15)
+ slag %r7,%r7,2
+ j sysc_nr_ok # restart svc
#
# _TIF_SINGLE_STEP is set, call do_single_step
#
sysc_singlestep:
- ni __TI_flags+7(%r9),255-_TIF_SINGLE_STEP # clear TIF_SINGLE_STEP
+ ni __TI_flags+7(%r12),255-_TIF_SINGLE_STEP # clear TIF_SINGLE_STEP
xc SP_SVCNR(2,%r15),SP_SVCNR(%r15) # clear svc number
la %r2,SP_PTREGS(%r15) # address of register-save area
larl %r14,sysc_return # load adr. of system return
@@ -379,8 +387,8 @@ sysc_singlestep:
sysc_tracesys:
la %r2,SP_PTREGS(%r15) # load pt_regs
la %r3,0
- srl %r7,2
- stg %r7,SP_R2(%r15)
+ llgh %r0,SP_SVCNR(%r15)
+ stg %r0,SP_R2(%r15)
brasl %r14,do_syscall_trace_enter
lghi %r0,NR_syscalls
clgr %r0,%r2
@@ -393,7 +401,7 @@ sysc_tracego:
basr %r14,%r8 # call sys_xxx
stg %r2,SP_R2(%r15) # store return value
sysc_tracenogo:
- tm __TI_flags+6(%r9),_TIF_SYSCALL
+ tm __TI_flags+6(%r12),_TIF_SYSCALL
jz sysc_return
la %r2,SP_PTREGS(%r15) # load pt_regs
larl %r14,sysc_return # return point is sysc_return
@@ -405,7 +413,7 @@ sysc_tracenogo:
.globl ret_from_fork
ret_from_fork:
lg %r13,__LC_SVC_NEW_PSW+8
- lg %r9,__LC_THREAD_INFO # load pointer to thread_info struct
+ lg %r12,__LC_THREAD_INFO # load pointer to thread_info struct
tm SP_PSW+1(%r15),0x01 # forking a kernel thread ?
jo 0f
stg %r15,SP_R15(%r15) # store stack pointer for new kthread
@@ -435,12 +443,14 @@ kernel_execve:
br %r14
# execve succeeded.
0: stnsm __SF_EMPTY(%r15),0xfc # disable interrupts
+# TRACE_IRQS_OFF
lg %r15,__LC_KERNEL_STACK # load ksp
aghi %r15,-SP_SIZE # make room for registers & psw
lg %r13,__LC_SVC_NEW_PSW+8
- lg %r9,__LC_THREAD_INFO
mvc SP_PTREGS(__PT_SIZE,%r15),0(%r12) # copy pt_regs
+ lg %r12,__LC_THREAD_INFO
xc __SF_BACKCHAIN(8,%r15),__SF_BACKCHAIN(%r15)
+# TRACE_IRQS_ON
stosm __SF_EMPTY(%r15),0x03 # reenable interrupts
brasl %r14,execve_tail
j sysc_return
@@ -465,20 +475,23 @@ pgm_check_handler:
* for LPSW?).
*/
stpt __LC_SYNC_ENTER_TIMER
- SAVE_ALL_BASE __LC_SAVE_AREA
tm __LC_PGM_INT_CODE+1,0x80 # check whether we got a per exception
jnz pgm_per # got per exception -> special case
- SAVE_ALL_SYNC __LC_PGM_OLD_PSW,__LC_SAVE_AREA
- CREATE_STACK_FRAME __LC_PGM_OLD_PSW,__LC_SAVE_AREA
+ SAVE_ALL_PGM __LC_PGM_OLD_PSW,__LC_SAVE_AREA
+ CREATE_STACK_FRAME __LC_SAVE_AREA
+ xc SP_ILC(4,%r15),SP_ILC(%r15)
+ mvc SP_PSW(16,%r15),__LC_PGM_OLD_PSW
+ lg %r12,__LC_THREAD_INFO # load pointer to thread_info struct
tm SP_PSW+1(%r15),0x01 # interrupting from user ?
jz pgm_no_vtime
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
+ LAST_BREAK
pgm_no_vtime:
- lg %r9,__LC_THREAD_INFO # load pointer to thread_info struct
- mvc SP_ARGS(8,%r15),__LC_LAST_BREAK
- TRACE_IRQS_OFF
+ HANDLE_SIE_INTERCEPT
+ TRACE_IRQS_CHECK_OFF
+ stg %r11,SP_ARGS(%r15)
lgf %r3,__LC_PGM_ILC # load program interruption code
lghi %r8,0x7f
ngr %r8,%r3
@@ -487,8 +500,10 @@ pgm_do_call:
larl %r1,pgm_check_table
lg %r1,0(%r8,%r1) # load address of handler routine
la %r2,SP_PTREGS(%r15) # address of register-save area
- larl %r14,sysc_return
- br %r1 # branch to interrupt-handler
+ basr %r14,%r1 # branch to interrupt-handler
+pgm_exit:
+ TRACE_IRQS_CHECK_ON
+ j sysc_return
#
# handle per exception
@@ -500,55 +515,60 @@ pgm_per:
clc __LC_PGM_OLD_PSW(16),__LC_SVC_NEW_PSW
je pgm_svcper
# no interesting special case, ignore PER event
- lmg %r12,%r15,__LC_SAVE_AREA
lpswe __LC_PGM_OLD_PSW
#
# Normal per exception
#
pgm_per_std:
- SAVE_ALL_SYNC __LC_PGM_OLD_PSW,__LC_SAVE_AREA
- CREATE_STACK_FRAME __LC_PGM_OLD_PSW,__LC_SAVE_AREA
+ SAVE_ALL_PGM __LC_PGM_OLD_PSW,__LC_SAVE_AREA
+ CREATE_STACK_FRAME __LC_SAVE_AREA
+ mvc SP_PSW(16,%r15),__LC_PGM_OLD_PSW
+ lg %r12,__LC_THREAD_INFO # load pointer to thread_info struct
tm SP_PSW+1(%r15),0x01 # interrupting from user ?
jz pgm_no_vtime2
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
+ LAST_BREAK
pgm_no_vtime2:
- lg %r9,__LC_THREAD_INFO # load pointer to thread_info struct
- TRACE_IRQS_OFF
- lg %r1,__TI_task(%r9)
+ HANDLE_SIE_INTERCEPT
+ TRACE_IRQS_CHECK_OFF
+ lg %r1,__TI_task(%r12)
tm SP_PSW+1(%r15),0x01 # kernel per event ?
jz kernel_per
mvc __THREAD_per+__PER_atmid(2,%r1),__LC_PER_ATMID
mvc __THREAD_per+__PER_address(8,%r1),__LC_PER_ADDRESS
mvc __THREAD_per+__PER_access_id(1,%r1),__LC_PER_ACCESS_ID
- oi __TI_flags+7(%r9),_TIF_SINGLE_STEP # set TIF_SINGLE_STEP
+ oi __TI_flags+7(%r12),_TIF_SINGLE_STEP # set TIF_SINGLE_STEP
lgf %r3,__LC_PGM_ILC # load program interruption code
lghi %r8,0x7f
ngr %r8,%r3 # clear per-event-bit and ilc
- je sysc_return
+ je pgm_exit
j pgm_do_call
#
# it was a single stepped SVC that is causing all the trouble
#
pgm_svcper:
- SAVE_ALL_SYNC __LC_SVC_OLD_PSW,__LC_SAVE_AREA
- CREATE_STACK_FRAME __LC_SVC_OLD_PSW,__LC_SAVE_AREA
+ SAVE_ALL_PGM __LC_SVC_OLD_PSW,__LC_SAVE_AREA
+ CREATE_STACK_FRAME __LC_SAVE_AREA
+ mvc SP_PSW(16,%r15),__LC_SVC_OLD_PSW
+ mvc SP_ILC(4,%r15),__LC_SVC_ILC
+ lg %r12,__LC_THREAD_INFO # load pointer to thread_info struct
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
- llgh %r7,__LC_SVC_INT_CODE # get svc number from lowcore
- lg %r9,__LC_THREAD_INFO # load pointer to thread_info struct
- lg %r8,__TI_task(%r9)
+ LAST_BREAK
+ TRACE_IRQS_OFF
+ lg %r8,__TI_task(%r12)
mvc __THREAD_per+__PER_atmid(2,%r8),__LC_PER_ATMID
mvc __THREAD_per+__PER_address(8,%r8),__LC_PER_ADDRESS
mvc __THREAD_per+__PER_access_id(1,%r8),__LC_PER_ACCESS_ID
- oi __TI_flags+7(%r9),_TIF_SINGLE_STEP # set TIF_SINGLE_STEP
+ oi __TI_flags+7(%r12),_TIF_SINGLE_STEP # set TIF_SINGLE_STEP
TRACE_IRQS_ON
- lmg %r2,%r6,SP_R2(%r15) # load svc arguments
stosm __SF_EMPTY(%r15),0x03 # reenable interrupts
+ lmg %r2,%r6,SP_R2(%r15) # load svc arguments
j sysc_do_svc
#
@@ -557,8 +577,8 @@ pgm_svcper:
kernel_per:
xc SP_SVCNR(2,%r15),SP_SVCNR(%r15) # clear svc number
la %r2,SP_PTREGS(%r15) # address of register-save area
- larl %r14,sysc_restore # load adr. of system ret, no work
- jg do_single_step # branch to do_single_step
+ brasl %r14,do_single_step
+ j pgm_exit
/*
* IO interrupt handler routine
@@ -567,162 +587,133 @@ kernel_per:
io_int_handler:
stck __LC_INT_CLOCK
stpt __LC_ASYNC_ENTER_TIMER
- SAVE_ALL_BASE __LC_SAVE_AREA+32
- SAVE_ALL_ASYNC __LC_IO_OLD_PSW,__LC_SAVE_AREA+32
- CREATE_STACK_FRAME __LC_IO_OLD_PSW,__LC_SAVE_AREA+32
+ SAVE_ALL_ASYNC __LC_IO_OLD_PSW,__LC_SAVE_AREA+40
+ CREATE_STACK_FRAME __LC_SAVE_AREA+40
+ mvc SP_PSW(16,%r15),0(%r12) # move user PSW to stack
+ lg %r12,__LC_THREAD_INFO # load pointer to thread_info struct
tm SP_PSW+1(%r15),0x01 # interrupting from user ?
jz io_no_vtime
UPDATE_VTIME __LC_EXIT_TIMER,__LC_ASYNC_ENTER_TIMER,__LC_USER_TIMER
UPDATE_VTIME __LC_LAST_UPDATE_TIMER,__LC_EXIT_TIMER,__LC_SYSTEM_TIMER
mvc __LC_LAST_UPDATE_TIMER(8),__LC_ASYNC_ENTER_TIMER
+ LAST_BREAK
io_no_vtime:
- lg %r9,__LC_THREAD_INFO # load pointer to thread_info struct
+ HANDLE_SIE_INTERCEPT
TRACE_IRQS_OFF
la %r2,SP_PTREGS(%r15) # address of register-save area
brasl %r14,do_IRQ # call standard irq handler
io_return:
- tm __TI_flags+7(%r9),_TIF_WORK_INT
+ LOCKDEP_SYS_EXIT
+ TRACE_IRQS_ON
+io_tif:
+ tm __TI_flags+7(%r12),_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
- .section .data,"aw",@progbits
- .align 8
- .globl io_restore_trace_psw
-io_restore_trace_psw:
- .quad 0, io_restore_trace
- .previous
-#endif
-
#
-# There is work todo, we need to check if we return to userspace, then
-# check, if we are in SIE, if yes leave it
+# 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
+# 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.
#
io_work:
tm SP_PSW+1(%r15),0x01 # returning to user ?
-#ifndef CONFIG_PREEMPT
-#if defined(CONFIG_KVM) || defined(CONFIG_KVM_MODULE)
- jnz io_work_user # yes -> no need to check for SIE
- la %r1, BASED(sie_opcode) # we return to kernel here
- lg %r2, SP_PSW+8(%r15)
- clc 0(2,%r1), 0(%r2) # is current instruction = SIE?
- jne io_restore # no-> return to kernel
- lg %r1, SP_PSW+8(%r15) # yes-> add 4 bytes to leave SIE
- aghi %r1, 4
- stg %r1, SP_PSW+8(%r15)
- j io_restore # return to kernel
-#else
- jno io_restore # no-> skip resched & signal
-#endif
-#else
- jnz io_work_user # yes -> do resched & signal
-#if defined(CONFIG_KVM) || defined(CONFIG_KVM_MODULE)
- la %r1, BASED(sie_opcode)
- lg %r2, SP_PSW+8(%r15)
- clc 0(2,%r1), 0(%r2) # is current instruction = SIE?
- jne 0f # no -> leave PSW alone
- lg %r1, SP_PSW+8(%r15) # yes-> add 4 bytes to leave SIE
- aghi %r1, 4
- stg %r1, SP_PSW+8(%r15)
-0:
-#endif
+ jo io_work_user # yes -> do resched & signal
+#ifdef CONFIG_PREEMPT
# check for preemptive scheduling
- icm %r0,15,__TI_precount(%r9)
+ icm %r0,15,__TI_precount(%r12)
jnz io_restore # preemption is disabled
+ tm __TI_flags+7(%r12),_TIF_NEED_RESCHED
+ jno io_restore
# switch to kernel stack
lg %r1,SP_R15(%r15)
aghi %r1,-SP_SIZE
mvc SP_PTREGS(__PT_SIZE,%r1),SP_PTREGS(%r15)
xc __SF_BACKCHAIN(8,%r1),__SF_BACKCHAIN(%r1) # clear back chain
lgr %r15,%r1
-io_resume_loop:
- tm __TI_flags+7(%r9),_TIF_NEED_RESCHED
- jno io_restore
- larl %r14,io_resume_loop
- jg preempt_schedule_irq
+ # TRACE_IRQS_ON already done at io_return, call
+ # TRACE_IRQS_OFF to keep things symmetrical
+ TRACE_IRQS_OFF
+ brasl %r14,preempt_schedule_irq
+ j io_return
+#else
+ j io_restore
#endif
+#
+# Need to do work before returning to userspace, switch to kernel stack
+#
io_work_user:
lg %r1,__LC_KERNEL_STACK
aghi %r1,-SP_SIZE
mvc SP_PTREGS(__PT_SIZE,%r1),SP_PTREGS(%r15)
xc __SF_BACKCHAIN(8,%r1),__SF_BACKCHAIN(%r1) # clear back chain
lgr %r15,%r1
+
#
# One of the work bits is on. Find out which one.
-# Checked are: _TIF_SIGPENDING, _TIF_RESTORE_SIGPENDING, _TIF_NEED_RESCHED
+# Checked are: _TIF_SIGPENDING, _TIF_NOTIFY_RESUME, _TIF_NEED_RESCHED
# and _TIF_MCCK_PENDING
#
-io_work_loop:
- tm __TI_flags+7(%r9),_TIF_MCCK_PENDING
+io_work_tif:
+ tm __TI_flags+7(%r12),_TIF_MCCK_PENDING
jo io_mcck_pending
- tm __TI_flags+7(%r9),_TIF_NEED_RESCHED
+ tm __TI_flags+7(%r12),_TIF_NEED_RESCHED
jo io_reschedule
- tm __TI_flags+7(%r9),_TIF_SIGPENDING
- jnz io_sigpending
- tm __TI_flags+7(%r9),_TIF_NOTIFY_RESUME
- jnz io_notify_resume
- j io_restore
-io_work_done:
-
-#if defined(CONFIG_KVM) || defined(CONFIG_KVM_MODULE)
-sie_opcode:
- .long 0xb2140000
-#endif
+ tm __TI_flags+7(%r12),_TIF_SIGPENDING
+ jo io_sigpending
+ tm __TI_flags+7(%r12),_TIF_NOTIFY_RESUME
+ jo io_notify_resume
+ j io_return # beware of critical section cleanup
#
# _TIF_MCCK_PENDING is set, call handler
#
io_mcck_pending:
+ # TRACE_IRQS_ON already done at io_return
brasl %r14,s390_handle_mcck # TIF bit will be cleared by handler
- j io_work_loop
+ TRACE_IRQS_OFF
+ j io_return
#
# _TIF_NEED_RESCHED is set, call schedule
#
io_reschedule:
- TRACE_IRQS_ON
+ # TRACE_IRQS_ON already done at io_return
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_restore # there is no work to do
- j io_work_loop
+ j io_return
#
# _TIF_SIGPENDING or is set, call do_signal
#
io_sigpending:
- TRACE_IRQS_ON
+ # TRACE_IRQS_ON already done at io_return
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
+ j io_return
#
# _TIF_NOTIFY_RESUME or is set, call do_notify_resume
#
io_notify_resume:
- TRACE_IRQS_ON
+ # TRACE_IRQS_ON already done at io_return
stosm __SF_EMPTY(%r15),0x03 # reenable interrupts
la %r2,SP_PTREGS(%r15) # load pt_regs
brasl %r14,do_notify_resume # call do_notify_resume
stnsm __SF_EMPTY(%r15),0xfc # disable I/O and ext. interrupts
TRACE_IRQS_OFF
- j io_work_loop
+ j io_return
/*
* External interrupt handler routine
@@ -731,16 +722,18 @@ io_notify_resume:
ext_int_handler:
stck __LC_INT_CLOCK
stpt __LC_ASYNC_ENTER_TIMER
- SAVE_ALL_BASE __LC_SAVE_AREA+32
- SAVE_ALL_ASYNC __LC_EXT_OLD_PSW,__LC_SAVE_AREA+32
- CREATE_STACK_FRAME __LC_EXT_OLD_PSW,__LC_SAVE_AREA+32
+ SAVE_ALL_ASYNC __LC_EXT_OLD_PSW,__LC_SAVE_AREA+40
+ CREATE_STACK_FRAME __LC_SAVE_AREA+40
+ mvc SP_PSW(16,%r15),0(%r12) # move user PSW to stack
+ lg %r12,__LC_THREAD_INFO # load pointer to thread_info struct
tm SP_PSW+1(%r15),0x01 # interrupting from user ?
jz ext_no_vtime
UPDATE_VTIME __LC_EXIT_TIMER,__LC_ASYNC_ENTER_TIMER,__LC_USER_TIMER
UPDATE_VTIME __LC_LAST_UPDATE_TIMER,__LC_EXIT_TIMER,__LC_SYSTEM_TIMER
mvc __LC_LAST_UPDATE_TIMER(8),__LC_ASYNC_ENTER_TIMER
+ LAST_BREAK
ext_no_vtime:
- lg %r9,__LC_THREAD_INFO # load pointer to thread_info struct
+ HANDLE_SIE_INTERCEPT
TRACE_IRQS_OFF
la %r2,SP_PTREGS(%r15) # address of register-save area
llgh %r3,__LC_EXT_INT_CODE # get interruption code
@@ -754,17 +747,18 @@ __critical_end:
*/
.globl mcck_int_handler
mcck_int_handler:
- stck __LC_INT_CLOCK
+ stck __LC_MCCK_CLOCK
la %r1,4095 # revalidate r1
spt __LC_CPU_TIMER_SAVE_AREA-4095(%r1) # revalidate cpu timer
lmg %r0,%r15,__LC_GPREGS_SAVE_AREA-4095(%r1)# revalidate gprs
- SAVE_ALL_BASE __LC_SAVE_AREA+64
+ stmg %r11,%r15,__LC_SAVE_AREA+80
+ larl %r13,system_call
+ lg %r11,__LC_LAST_BREAK
la %r12,__LC_MCK_OLD_PSW
tm __LC_MCCK_CODE,0x80 # system damage?
jo mcck_int_main # yes -> rest of mcck code invalid
la %r14,4095
- mvc __LC_SAVE_AREA+104(8),__LC_ASYNC_ENTER_TIMER
- mvc __LC_ASYNC_ENTER_TIMER(8),__LC_CPU_TIMER_SAVE_AREA-4095(%r14)
+ mvc __LC_MCCK_ENTER_TIMER(8),__LC_CPU_TIMER_SAVE_AREA-4095(%r14)
tm __LC_MCCK_CODE+5,0x02 # stored cpu timer value valid?
jo 1f
la %r14,__LC_SYNC_ENTER_TIMER
@@ -778,7 +772,7 @@ mcck_int_handler:
jl 0f
la %r14,__LC_LAST_UPDATE_TIMER
0: spt 0(%r14)
- mvc __LC_ASYNC_ENTER_TIMER(8),0(%r14)
+ mvc __LC_MCCK_ENTER_TIMER(8),0(%r14)
1: tm __LC_MCCK_CODE+2,0x09 # mwp + ia of old psw valid?
jno mcck_int_main # no -> skip cleanup critical
tm __LC_MCK_OLD_PSW+1,0x01 # test problem state bit
@@ -794,16 +788,19 @@ mcck_int_main:
srag %r14,%r14,PAGE_SHIFT
jz 0f
lg %r15,__LC_PANIC_STACK # load panic stack
-0: CREATE_STACK_FRAME __LC_MCK_OLD_PSW,__LC_SAVE_AREA+64
+0: aghi %r15,-SP_SIZE # make room for registers & psw
+ CREATE_STACK_FRAME __LC_SAVE_AREA+80
+ mvc SP_PSW(16,%r15),0(%r12)
+ lg %r12,__LC_THREAD_INFO # load pointer to thread_info struct
tm __LC_MCCK_CODE+2,0x08 # mwp of old psw valid?
jno mcck_no_vtime # no -> no timer update
tm SP_PSW+1(%r15),0x01 # interrupting from user ?
jz mcck_no_vtime
- UPDATE_VTIME __LC_EXIT_TIMER,__LC_ASYNC_ENTER_TIMER,__LC_USER_TIMER
+ UPDATE_VTIME __LC_EXIT_TIMER,__LC_MCCK_ENTER_TIMER,__LC_USER_TIMER
UPDATE_VTIME __LC_LAST_UPDATE_TIMER,__LC_EXIT_TIMER,__LC_SYSTEM_TIMER
- mvc __LC_LAST_UPDATE_TIMER(8),__LC_ASYNC_ENTER_TIMER
+ mvc __LC_LAST_UPDATE_TIMER(8),__LC_MCCK_ENTER_TIMER
+ LAST_BREAK
mcck_no_vtime:
- lg %r9,__LC_THREAD_INFO # load pointer to thread_info struct
la %r2,SP_PTREGS(%r15) # load pt_regs
brasl %r14,s390_do_machine_check
tm SP_PSW+1(%r15),0x01 # returning to user ?
@@ -814,8 +811,9 @@ mcck_no_vtime:
xc __SF_BACKCHAIN(8,%r1),__SF_BACKCHAIN(%r1) # clear back chain
lgr %r15,%r1
stosm __SF_EMPTY(%r15),0x04 # turn dat on
- tm __TI_flags+7(%r9),_TIF_MCCK_PENDING
+ tm __TI_flags+7(%r12),_TIF_MCCK_PENDING
jno mcck_return
+ HANDLE_SIE_INTERCEPT
TRACE_IRQS_OFF
brasl %r14,s390_handle_mcck
TRACE_IRQS_ON
@@ -823,11 +821,11 @@ mcck_return:
mvc __LC_RETURN_MCCK_PSW(16),SP_PSW(%r15) # move return PSW
ni __LC_RETURN_MCCK_PSW+1,0xfd # clear wait state bit
lmg %r0,%r15,SP_R0(%r15) # load gprs 0-15
- mvc __LC_ASYNC_ENTER_TIMER(8),__LC_SAVE_AREA+104
tm __LC_RETURN_MCCK_PSW+1,0x01 # returning to user ?
jno 0f
stpt __LC_EXIT_TIMER
0: lpswe __LC_RETURN_MCCK_PSW # back to caller
+mcck_done:
/*
* Restart interruption handler, kick starter for additional CPUs
@@ -883,14 +881,14 @@ stack_overflow:
lg %r15,__LC_PANIC_STACK # change to panic stack
aghi %r15,-SP_SIZE
mvc SP_PSW(16,%r15),0(%r12) # move user PSW to stack
- stmg %r0,%r11,SP_R0(%r15) # store gprs %r0-%r11 to kernel stack
+ stmg %r0,%r10,SP_R0(%r15) # store gprs %r0-%r10 to kernel stack
la %r1,__LC_SAVE_AREA
chi %r12,__LC_SVC_OLD_PSW
je 0f
chi %r12,__LC_PGM_OLD_PSW
je 0f
- la %r1,__LC_SAVE_AREA+32
-0: mvc SP_R12(32,%r15),0(%r1) # move %r12-%r15 to stack
+ la %r1,__LC_SAVE_AREA+40
+0: mvc SP_R11(40,%r15),0(%r1) # move %r11-%r15 to stack
mvc SP_ARGS(8,%r15),__LC_LAST_BREAK
xc __SF_BACKCHAIN(8,%r15),__SF_BACKCHAIN(%r15) # clear back chain
la %r2,SP_PTREGS(%r15) # load pt_regs
@@ -899,18 +897,14 @@ stack_overflow:
cleanup_table_system_call:
.quad system_call, sysc_do_svc
-cleanup_table_sysc_return:
- .quad sysc_return, sysc_leave
-cleanup_table_sysc_leave:
- .quad sysc_leave, sysc_done
-cleanup_table_sysc_work_loop:
- .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_work_done
+cleanup_table_sysc_tif:
+ .quad sysc_tif, sysc_restore
+cleanup_table_sysc_restore:
+ .quad sysc_restore, sysc_done
+cleanup_table_io_tif:
+ .quad io_tif, io_restore
+cleanup_table_io_restore:
+ .quad io_restore, io_done
cleanup_critical:
clc 8(8,%r12),BASED(cleanup_table_system_call)
@@ -918,61 +912,54 @@ cleanup_critical:
clc 8(8,%r12),BASED(cleanup_table_system_call+8)
jl cleanup_system_call
0:
- clc 8(8,%r12),BASED(cleanup_table_sysc_return)
- jl 0f
- clc 8(8,%r12),BASED(cleanup_table_sysc_return+8)
- jl cleanup_sysc_return
-0:
- clc 8(8,%r12),BASED(cleanup_table_sysc_leave)
+ clc 8(8,%r12),BASED(cleanup_table_sysc_tif)
jl 0f
- clc 8(8,%r12),BASED(cleanup_table_sysc_leave+8)
- jl cleanup_sysc_leave
+ clc 8(8,%r12),BASED(cleanup_table_sysc_tif+8)
+ jl cleanup_sysc_tif
0:
- clc 8(8,%r12),BASED(cleanup_table_sysc_work_loop)
+ clc 8(8,%r12),BASED(cleanup_table_sysc_restore)
jl 0f
- clc 8(8,%r12),BASED(cleanup_table_sysc_work_loop+8)
- jl cleanup_sysc_return
+ clc 8(8,%r12),BASED(cleanup_table_sysc_restore+8)
+ jl cleanup_sysc_restore
0:
- clc 8(8,%r12),BASED(cleanup_table_io_return)
+ clc 8(8,%r12),BASED(cleanup_table_io_tif)
jl 0f
- clc 8(8,%r12),BASED(cleanup_table_io_return+8)
- jl cleanup_io_return
+ clc 8(8,%r12),BASED(cleanup_table_io_tif+8)
+ jl cleanup_io_tif
0:
- clc 8(8,%r12),BASED(cleanup_table_io_leave)
+ clc 8(8,%r12),BASED(cleanup_table_io_restore)
jl 0f
- clc 8(8,%r12),BASED(cleanup_table_io_leave+8)
- jl cleanup_io_leave
-0:
- clc 8(8,%r12),BASED(cleanup_table_io_work_loop)
- jl 0f
- clc 8(8,%r12),BASED(cleanup_table_io_work_loop+8)
- jl cleanup_io_work_loop
+ clc 8(8,%r12),BASED(cleanup_table_io_restore+8)
+ jl cleanup_io_restore
0:
br %r14
cleanup_system_call:
mvc __LC_RETURN_PSW(16),0(%r12)
- cghi %r12,__LC_MCK_OLD_PSW
- je 0f
- la %r12,__LC_SAVE_AREA+32
- j 1f
-0: la %r12,__LC_SAVE_AREA+64
-1:
clc __LC_RETURN_PSW+8(8),BASED(cleanup_system_call_insn+8)
jh 0f
+ mvc __LC_SYNC_ENTER_TIMER(8),__LC_MCCK_ENTER_TIMER
+ cghi %r12,__LC_MCK_OLD_PSW
+ je 0f
mvc __LC_SYNC_ENTER_TIMER(8),__LC_ASYNC_ENTER_TIMER
+0: cghi %r12,__LC_MCK_OLD_PSW
+ la %r12,__LC_SAVE_AREA+80
+ je 0f
+ la %r12,__LC_SAVE_AREA+40
0: clc __LC_RETURN_PSW+8(8),BASED(cleanup_system_call_insn+16)
jhe cleanup_vtime
clc __LC_RETURN_PSW+8(8),BASED(cleanup_system_call_insn)
jh 0f
- mvc __LC_SAVE_AREA(32),0(%r12)
-0: stg %r13,8(%r12)
- stg %r12,__LC_SAVE_AREA+96 # argh
- SAVE_ALL_SYNC __LC_SVC_OLD_PSW,__LC_SAVE_AREA
- CREATE_STACK_FRAME __LC_SVC_OLD_PSW,__LC_SAVE_AREA
- lg %r12,__LC_SAVE_AREA+96 # argh
- stg %r15,24(%r12)
- llgh %r7,__LC_SVC_INT_CODE
+ mvc __LC_SAVE_AREA(40),0(%r12)
+0: lg %r15,__LC_KERNEL_STACK # problem state -> load ksp
+ aghi %r15,-SP_SIZE # make room for registers & psw
+ stg %r15,32(%r12)
+ stg %r11,0(%r12)
+ CREATE_STACK_FRAME __LC_SAVE_AREA
+ mvc SP_PSW(16,%r15),__LC_SVC_OLD_PSW
+ mvc SP_ILC(4,%r15),__LC_SVC_ILC
+ stg %r7,SP_ARGS(%r15)
+ mvc 8(8,%r12),__LC_THREAD_INFO
cleanup_vtime:
clc __LC_RETURN_PSW+8(8),BASED(cleanup_system_call_insn+24)
jhe cleanup_stime
@@ -983,7 +970,11 @@ 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
- mvc __LC_RETURN_PSW+8(8),BASED(cleanup_table_system_call+8)
+ srag %r12,%r11,23
+ lg %r12,__LC_THREAD_INFO
+ jz 0f
+ stg %r11,__TI_last_break(%r12)
+0: mvc __LC_RETURN_PSW+8(8),BASED(cleanup_table_system_call+8)
la %r12,__LC_RETURN_PSW
br %r14
cleanup_system_call_insn:
@@ -993,61 +984,54 @@ cleanup_system_call_insn:
.quad sysc_stime
.quad sysc_update
-cleanup_sysc_return:
+cleanup_sysc_tif:
mvc __LC_RETURN_PSW(8),0(%r12)
- mvc __LC_RETURN_PSW+8(8),BASED(cleanup_table_sysc_return)
+ mvc __LC_RETURN_PSW+8(8),BASED(cleanup_table_sysc_tif)
la %r12,__LC_RETURN_PSW
br %r14
-cleanup_sysc_leave:
- clc 8(8,%r12),BASED(cleanup_sysc_leave_insn)
- je 3f
- clc 8(8,%r12),BASED(cleanup_sysc_leave_insn+8)
+cleanup_sysc_restore:
+ clc 8(8,%r12),BASED(cleanup_sysc_restore_insn)
+ je 2f
+ clc 8(8,%r12),BASED(cleanup_sysc_restore_insn+8)
jhe 0f
+ mvc __LC_EXIT_TIMER(8),__LC_MCCK_ENTER_TIMER
+ cghi %r12,__LC_MCK_OLD_PSW
+ je 0f
mvc __LC_EXIT_TIMER(8),__LC_ASYNC_ENTER_TIMER
0: mvc __LC_RETURN_PSW(16),SP_PSW(%r15)
cghi %r12,__LC_MCK_OLD_PSW
- jne 1f
- mvc __LC_SAVE_AREA+64(32),SP_R12(%r15)
- j 2f
-1: mvc __LC_SAVE_AREA+32(32),SP_R12(%r15)
-2: lmg %r0,%r11,SP_R0(%r15)
+ la %r12,__LC_SAVE_AREA+80
+ je 1f
+ la %r12,__LC_SAVE_AREA+40
+1: mvc 0(40,%r12),SP_R11(%r15)
+ lmg %r0,%r10,SP_R0(%r15)
lg %r15,SP_R15(%r15)
-3: la %r12,__LC_RETURN_PSW
+2: la %r12,__LC_RETURN_PSW
br %r14
-cleanup_sysc_leave_insn:
+cleanup_sysc_restore_insn:
.quad sysc_done - 4
.quad sysc_done - 16
-cleanup_io_return:
- mvc __LC_RETURN_PSW(8),0(%r12)
- mvc __LC_RETURN_PSW+8(8),BASED(cleanup_table_io_return)
- la %r12,__LC_RETURN_PSW
- br %r14
-
-cleanup_io_work_loop:
+cleanup_io_tif:
mvc __LC_RETURN_PSW(8),0(%r12)
- mvc __LC_RETURN_PSW+8(8),BASED(cleanup_table_io_work_loop)
+ mvc __LC_RETURN_PSW+8(8),BASED(cleanup_table_io_tif)
la %r12,__LC_RETURN_PSW
br %r14
-cleanup_io_leave:
- clc 8(8,%r12),BASED(cleanup_io_leave_insn)
- je 3f
- clc 8(8,%r12),BASED(cleanup_io_leave_insn+8)
+cleanup_io_restore:
+ clc 8(8,%r12),BASED(cleanup_io_restore_insn)
+ je 1f
+ clc 8(8,%r12),BASED(cleanup_io_restore_insn+8)
jhe 0f
- mvc __LC_EXIT_TIMER(8),__LC_ASYNC_ENTER_TIMER
+ mvc __LC_EXIT_TIMER(8),__LC_MCCK_ENTER_TIMER
0: mvc __LC_RETURN_PSW(16),SP_PSW(%r15)
- cghi %r12,__LC_MCK_OLD_PSW
- jne 1f
- mvc __LC_SAVE_AREA+64(32),SP_R12(%r15)
- j 2f
-1: mvc __LC_SAVE_AREA+32(32),SP_R12(%r15)
-2: lmg %r0,%r11,SP_R0(%r15)
+ mvc __LC_SAVE_AREA+80(40),SP_R11(%r15)
+ lmg %r0,%r10,SP_R0(%r15)
lg %r15,SP_R15(%r15)
-3: la %r12,__LC_RETURN_PSW
+1: la %r12,__LC_RETURN_PSW
br %r14
-cleanup_io_leave_insn:
+cleanup_io_restore_insn:
.quad io_done - 4
.quad io_done - 16
@@ -1055,13 +1039,6 @@ cleanup_io_leave_insn:
* Integer constants
*/
.align 4
-.Lconst:
-.Lnr_syscalls: .long NR_syscalls
-.L0x0130: .short 0x130
-.L0x0140: .short 0x140
-.L0x0150: .short 0x150
-.L0x0160: .short 0x160
-.L0x0170: .short 0x170
.Lcritical_start:
.quad __critical_start
.Lcritical_end:
diff --git a/arch/s390/kernel/head.S b/arch/s390/kernel/head.S
index 9d1f76702d47..51838ad42d56 100644
--- a/arch/s390/kernel/head.S
+++ b/arch/s390/kernel/head.S
@@ -328,8 +328,8 @@ iplstart:
#
# reset files in VM reader
#
- stidp __LC_CPUID # store cpuid
- tm __LC_CPUID,0xff # running VM ?
+ stidp __LC_SAVE_AREA # store cpuid
+ tm __LC_SAVE_AREA,0xff # running VM ?
bno .Lnoreset
la %r2,.Lreset
lhi %r3,26
diff --git a/arch/s390/kernel/head31.S b/arch/s390/kernel/head31.S
index 1bbcc499d455..b8f8dc126102 100644
--- a/arch/s390/kernel/head31.S
+++ b/arch/s390/kernel/head31.S
@@ -82,7 +82,7 @@ startup_continue:
_ehead:
#ifdef CONFIG_SHARED_KERNEL
- .org 0x100000
+ .org 0x100000 - 0x11000 # head.o ends at 0x11000
#endif
#
diff --git a/arch/s390/kernel/head64.S b/arch/s390/kernel/head64.S
index 1f70970de0aa..cdef68717416 100644
--- a/arch/s390/kernel/head64.S
+++ b/arch/s390/kernel/head64.S
@@ -80,7 +80,7 @@ startup_continue:
_ehead:
#ifdef CONFIG_SHARED_KERNEL
- .org 0x100000
+ .org 0x100000 - 0x11000 # head.o ends at 0x11000
#endif
#
diff --git a/arch/s390/kernel/nmi.c b/arch/s390/kernel/nmi.c
index 015e27da40eb..ac151399ef34 100644
--- a/arch/s390/kernel/nmi.c
+++ b/arch/s390/kernel/nmi.c
@@ -255,7 +255,8 @@ void notrace s390_do_machine_check(struct pt_regs *regs)
int umode;
nmi_enter();
- s390_idle_check();
+ s390_idle_check(regs, S390_lowcore.mcck_clock,
+ S390_lowcore.mcck_enter_timer);
mci = (struct mci *) &S390_lowcore.mcck_interruption_code;
mcck = &__get_cpu_var(cpu_mcck);
diff --git a/arch/s390/kernel/processor.c b/arch/s390/kernel/processor.c
index 0729f36c2fe3..ecb2d02b02e4 100644
--- a/arch/s390/kernel/processor.c
+++ b/arch/s390/kernel/processor.c
@@ -18,24 +18,42 @@
#include <asm/lowcore.h>
#include <asm/param.h>
+static DEFINE_PER_CPU(struct cpuid, cpu_id);
+
+/*
+ * cpu_init - initializes state that is per-CPU.
+ */
+void __cpuinit cpu_init(void)
+{
+ struct cpuid *id = &per_cpu(cpu_id, smp_processor_id());
+
+ get_cpu_id(id);
+ atomic_inc(&init_mm.mm_count);
+ current->active_mm = &init_mm;
+ BUG_ON(current->mm);
+ enter_lazy_tlb(&init_mm, current);
+}
+
+/*
+ * print_cpu_info - print basic information about a cpu
+ */
void __cpuinit print_cpu_info(void)
{
+ struct cpuid *id = &per_cpu(cpu_id, smp_processor_id());
+
pr_info("Processor %d started, address %d, identification %06X\n",
- S390_lowcore.cpu_nr, S390_lowcore.cpu_addr,
- S390_lowcore.cpu_id.ident);
+ S390_lowcore.cpu_nr, S390_lowcore.cpu_addr, id->ident);
}
/*
* show_cpuinfo - Get information on one CPU for use by procfs.
*/
-
static int show_cpuinfo(struct seq_file *m, void *v)
{
static const char *hwcap_str[10] = {
"esan3", "zarch", "stfle", "msa", "ldisp", "eimm", "dfp",
"edat", "etf3eh", "highgprs"
};
- struct _lowcore *lc;
unsigned long n = (unsigned long) v - 1;
int i;
@@ -55,19 +73,12 @@ static int show_cpuinfo(struct seq_file *m, void *v)
}
if (cpu_online(n)) {
-#ifdef CONFIG_SMP
- lc = (smp_processor_id() == n) ?
- &S390_lowcore : lowcore_ptr[n];
-#else
- lc = &S390_lowcore;
-#endif
+ struct cpuid *id = &per_cpu(cpu_id, n);
seq_printf(m, "processor %li: "
"version = %02X, "
"identification = %06X, "
"machine = %04X\n",
- n, lc->cpu_id.version,
- lc->cpu_id.ident,
- lc->cpu_id.machine);
+ n, id->version, id->ident, id->machine);
}
preempt_enable();
return 0;
diff --git a/arch/s390/kernel/ptrace.c b/arch/s390/kernel/ptrace.c
index 33fdc5a79764..83339d33c4b1 100644
--- a/arch/s390/kernel/ptrace.c
+++ b/arch/s390/kernel/ptrace.c
@@ -57,6 +57,7 @@
enum s390_regset {
REGSET_GENERAL,
REGSET_FP,
+ REGSET_LAST_BREAK,
REGSET_GENERAL_EXTENDED,
};
@@ -381,6 +382,10 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
copied += sizeof(unsigned long);
}
return 0;
+ case PTRACE_GET_LAST_BREAK:
+ put_user(task_thread_info(child)->last_break,
+ (unsigned long __user *) data);
+ return 0;
default:
/* Removing high order bit from addr (only for 31 bit). */
addr &= PSW_ADDR_INSN;
@@ -633,6 +638,10 @@ long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
copied += sizeof(unsigned int);
}
return 0;
+ case PTRACE_GET_LAST_BREAK:
+ put_user(task_thread_info(child)->last_break,
+ (unsigned int __user *) data);
+ return 0;
}
return compat_ptrace_request(child, request, addr, data);
}
@@ -640,7 +649,7 @@ long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
asmlinkage long do_syscall_trace_enter(struct pt_regs *regs)
{
- long ret;
+ long ret = 0;
/* Do the secure computing check first. */
secure_computing(regs->gprs[2]);
@@ -649,7 +658,6 @@ asmlinkage long do_syscall_trace_enter(struct pt_regs *regs)
* The sysc_tracesys code in entry.S stored the system
* call number to gprs[2].
*/
- ret = regs->gprs[2];
if (test_thread_flag(TIF_SYSCALL_TRACE) &&
(tracehook_report_syscall_entry(regs) ||
regs->gprs[2] >= NR_syscalls)) {
@@ -671,7 +679,7 @@ asmlinkage long do_syscall_trace_enter(struct pt_regs *regs)
regs->gprs[2], regs->orig_gpr2,
regs->gprs[3], regs->gprs[4],
regs->gprs[5]);
- return ret;
+ return ret ?: regs->gprs[2];
}
asmlinkage void do_syscall_trace_exit(struct pt_regs *regs)
@@ -798,6 +806,28 @@ static int s390_fpregs_set(struct task_struct *target,
return rc;
}
+#ifdef CONFIG_64BIT
+
+static int s390_last_break_get(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ void *kbuf, void __user *ubuf)
+{
+ if (count > 0) {
+ if (kbuf) {
+ unsigned long *k = kbuf;
+ *k = task_thread_info(target)->last_break;
+ } else {
+ unsigned long __user *u = ubuf;
+ if (__put_user(task_thread_info(target)->last_break, u))
+ return -EFAULT;
+ }
+ }
+ return 0;
+}
+
+#endif
+
static const struct user_regset s390_regsets[] = {
[REGSET_GENERAL] = {
.core_note_type = NT_PRSTATUS,
@@ -815,6 +845,15 @@ static const struct user_regset s390_regsets[] = {
.get = s390_fpregs_get,
.set = s390_fpregs_set,
},
+#ifdef CONFIG_64BIT
+ [REGSET_LAST_BREAK] = {
+ .core_note_type = NT_S390_LAST_BREAK,
+ .n = 1,
+ .size = sizeof(long),
+ .align = sizeof(long),
+ .get = s390_last_break_get,
+ },
+#endif
};
static const struct user_regset_view user_s390_view = {
@@ -949,6 +988,27 @@ static int s390_compat_regs_high_set(struct task_struct *target,
return rc;
}
+static int s390_compat_last_break_get(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ void *kbuf, void __user *ubuf)
+{
+ compat_ulong_t last_break;
+
+ if (count > 0) {
+ last_break = task_thread_info(target)->last_break;
+ if (kbuf) {
+ unsigned long *k = kbuf;
+ *k = last_break;
+ } else {
+ unsigned long __user *u = ubuf;
+ if (__put_user(last_break, u))
+ return -EFAULT;
+ }
+ }
+ return 0;
+}
+
static const struct user_regset s390_compat_regsets[] = {
[REGSET_GENERAL] = {
.core_note_type = NT_PRSTATUS,
@@ -966,6 +1026,13 @@ static const struct user_regset s390_compat_regsets[] = {
.get = s390_fpregs_get,
.set = s390_fpregs_set,
},
+ [REGSET_LAST_BREAK] = {
+ .core_note_type = NT_S390_LAST_BREAK,
+ .n = 1,
+ .size = sizeof(long),
+ .align = sizeof(long),
+ .get = s390_compat_last_break_get,
+ },
[REGSET_GENERAL_EXTENDED] = {
.core_note_type = NT_S390_HIGH_GPRS,
.n = sizeof(s390_compat_regs_high) / sizeof(compat_long_t),
diff --git a/arch/s390/kernel/s390_ext.c b/arch/s390/kernel/s390_ext.c
index 59618bcd99b7..9ce641b5291f 100644
--- a/arch/s390/kernel/s390_ext.c
+++ b/arch/s390/kernel/s390_ext.c
@@ -120,7 +120,8 @@ void __irq_entry do_extint(struct pt_regs *regs, unsigned short code)
struct pt_regs *old_regs;
old_regs = set_irq_regs(regs);
- s390_idle_check();
+ s390_idle_check(regs, S390_lowcore.int_clock,
+ S390_lowcore.async_enter_timer);
irq_enter();
if (S390_lowcore.int_clock >= S390_lowcore.clock_comparator)
/* Serve timer interrupts first. */
diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c
index 91625f759ccd..7d893248d265 100644
--- a/arch/s390/kernel/setup.c
+++ b/arch/s390/kernel/setup.c
@@ -2,7 +2,7 @@
* arch/s390/kernel/setup.c
*
* S390 version
- * Copyright (C) 1999,2000 IBM Deutschland Entwicklung GmbH, IBM Corporation
+ * Copyright (C) IBM Corp. 1999,2010
* Author(s): Hartmut Penner (hp@de.ibm.com),
* Martin Schwidefsky (schwidefsky@de.ibm.com)
*
@@ -113,22 +113,6 @@ static struct resource data_resource = {
};
/*
- * cpu_init() initializes state that is per-CPU.
- */
-void __cpuinit cpu_init(void)
-{
- /*
- * Store processor id in lowcore (used e.g. in timer_interrupt)
- */
- get_cpu_id(&S390_lowcore.cpu_id);
-
- atomic_inc(&init_mm.mm_count);
- current->active_mm = &init_mm;
- BUG_ON(current->mm);
- enter_lazy_tlb(&init_mm, current);
-}
-
-/*
* condev= and conmode= setup parameter.
*/
@@ -385,10 +369,6 @@ static void setup_addressing_mode(void)
pr_info("Address spaces switched, "
"mvcos not available\n");
}
-#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
@@ -421,6 +401,7 @@ setup_lowcore(void)
lc->io_new_psw.mask = psw_kernel_bits;
lc->io_new_psw.addr = PSW_ADDR_AMODE | (unsigned long) io_int_handler;
lc->clock_comparator = -1ULL;
+ lc->cmf_hpp = -1ULL;
lc->kernel_stack = ((unsigned long) &init_thread_union) + THREAD_SIZE;
lc->async_stack = (unsigned long)
__alloc_bootmem(ASYNC_SIZE, ASYNC_SIZE, 0) + ASYNC_SIZE;
@@ -695,6 +676,7 @@ static void __init setup_hwcaps(void)
static const int stfl_bits[6] = { 0, 2, 7, 17, 19, 21 };
unsigned long long facility_list_extended;
unsigned int facility_list;
+ struct cpuid cpu_id;
int i;
facility_list = stfl();
@@ -756,7 +738,8 @@ static void __init setup_hwcaps(void)
*/
elf_hwcap |= HWCAP_S390_HIGH_GPRS;
- switch (S390_lowcore.cpu_id.machine) {
+ get_cpu_id(&cpu_id);
+ switch (cpu_id.machine) {
case 0x9672:
#if !defined(CONFIG_64BIT)
default: /* Use "g5" as default for 31 bit kernels. */
diff --git a/arch/s390/kernel/signal.c b/arch/s390/kernel/signal.c
index 6289945562b0..ee7ac8b11782 100644
--- a/arch/s390/kernel/signal.c
+++ b/arch/s390/kernel/signal.c
@@ -313,6 +313,7 @@ static int setup_frame(int sig, struct k_sigaction *ka,
To avoid breaking binary compatibility, they are passed as args. */
regs->gprs[4] = current->thread.trap_no;
regs->gprs[5] = current->thread.prot_addr;
+ regs->gprs[6] = task_thread_info(current)->last_break;
/* Place signal number on stack to allow backtrace from handler. */
if (__put_user(regs->gprs[2], (int __user *) &frame->signo))
@@ -376,6 +377,7 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
regs->gprs[2] = map_signal(sig);
regs->gprs[3] = (unsigned long) &frame->info;
regs->gprs[4] = (unsigned long) &frame->uc;
+ regs->gprs[5] = task_thread_info(current)->last_break;
return 0;
give_sigsegv:
diff --git a/arch/s390/kernel/time.c b/arch/s390/kernel/time.c
index d906bf19c14a..a2163c95eb98 100644
--- a/arch/s390/kernel/time.c
+++ b/arch/s390/kernel/time.c
@@ -391,7 +391,6 @@ static void __init time_init_wq(void)
if (time_sync_wq)
return;
time_sync_wq = create_singlethread_workqueue("timesync");
- stop_machine_create();
}
/*
diff --git a/arch/s390/kernel/topology.c b/arch/s390/kernel/topology.c
index 247b4c2d1e51..bcef00766a64 100644
--- a/arch/s390/kernel/topology.c
+++ b/arch/s390/kernel/topology.c
@@ -37,7 +37,8 @@ struct tl_cpu {
};
struct tl_container {
- unsigned char reserved[8];
+ unsigned char reserved[7];
+ unsigned char id;
};
union tl_entry {
@@ -58,6 +59,7 @@ struct tl_info {
struct core_info {
struct core_info *next;
+ unsigned char id;
cpumask_t mask;
};
@@ -73,6 +75,7 @@ static DECLARE_WORK(topology_work, topology_work_fn);
static DEFINE_SPINLOCK(topology_lock);
cpumask_t cpu_core_map[NR_CPUS];
+unsigned char cpu_core_id[NR_CPUS];
static cpumask_t cpu_coregroup_map(unsigned int cpu)
{
@@ -116,6 +119,7 @@ static void add_cpus_to_core(struct tl_cpu *tl_cpu, struct core_info *core)
for_each_present_cpu(lcpu) {
if (cpu_logical_map(lcpu) == rcpu) {
cpu_set(lcpu, core->mask);
+ cpu_core_id[lcpu] = core->id;
smp_cpu_polarization[lcpu] = tl_cpu->pp;
}
}
@@ -158,6 +162,7 @@ static void tl_to_cores(struct tl_info *info)
break;
case 1:
core = core->next;
+ core->id = tle->container.id;
break;
case 0:
add_cpus_to_core(&tle->cpu, core);
diff --git a/arch/s390/kernel/traps.c b/arch/s390/kernel/traps.c
index 6e7ad63854c0..5d8f0f3d0250 100644
--- a/arch/s390/kernel/traps.c
+++ b/arch/s390/kernel/traps.c
@@ -46,13 +46,7 @@
pgm_check_handler_t *pgm_check_table[128];
-#ifdef CONFIG_SYSCTL
-#ifdef CONFIG_PROCESS_DEBUG
-int sysctl_userprocess_debug = 1;
-#else
-int sysctl_userprocess_debug = 0;
-#endif
-#endif
+int show_unhandled_signals;
extern pgm_check_handler_t do_protection_exception;
extern pgm_check_handler_t do_dat_exception;
@@ -315,18 +309,19 @@ void die(const char * str, struct pt_regs * regs, long err)
do_exit(SIGSEGV);
}
-static void inline
-report_user_fault(long interruption_code, struct pt_regs *regs)
+static void inline report_user_fault(struct pt_regs *regs, long int_code,
+ int signr)
{
-#if defined(CONFIG_SYSCTL)
- if (!sysctl_userprocess_debug)
+ if ((task_pid_nr(current) > 1) && !show_unhandled_signals)
return;
-#endif
-#if defined(CONFIG_SYSCTL) || defined(CONFIG_PROCESS_DEBUG)
- printk("User process fault: interruption code 0x%lX\n",
- interruption_code);
+ if (!unhandled_signal(current, signr))
+ return;
+ if (!printk_ratelimit())
+ return;
+ printk("User process fault: interruption code 0x%lX ", int_code);
+ print_vma_addr("in ", regs->psw.addr & PSW_ADDR_INSN);
+ printk("\n");
show_regs(regs);
-#endif
}
int is_valid_bugaddr(unsigned long addr)
@@ -354,7 +349,7 @@ static void __kprobes inline do_trap(long interruption_code, int signr,
tsk->thread.trap_no = interruption_code & 0xffff;
force_sig_info(signr, info, tsk);
- report_user_fault(interruption_code, regs);
+ report_user_fault(regs, interruption_code, signr);
} else {
const struct exception_table_entry *fixup;
fixup = search_exception_tables(regs->psw.addr & PSW_ADDR_INSN);
@@ -390,8 +385,8 @@ static void default_trap_handler(struct pt_regs * regs, long interruption_code)
{
if (regs->psw.mask & PSW_MASK_PSTATE) {
local_irq_enable();
+ report_user_fault(regs, interruption_code, SIGSEGV);
do_exit(SIGSEGV);
- report_user_fault(interruption_code, regs);
} else
die("Unknown program exception", regs, interruption_code);
}
diff --git a/arch/s390/kernel/vdso.c b/arch/s390/kernel/vdso.c
index 6bc9c197aa91..6b83870507d5 100644
--- a/arch/s390/kernel/vdso.c
+++ b/arch/s390/kernel/vdso.c
@@ -102,11 +102,7 @@ static void vdso_init_per_cpu_data(int cpu, struct vdso_per_cpu_data *vpcd)
/*
* Allocate/free per cpu vdso data.
*/
-#ifdef CONFIG_64BIT
#define SEGMENT_ORDER 2
-#else
-#define SEGMENT_ORDER 1
-#endif
int vdso_alloc_per_cpu(int cpu, struct _lowcore *lowcore)
{
diff --git a/arch/s390/kernel/vtime.c b/arch/s390/kernel/vtime.c
index b59a812a010e..3479f1b0d4e0 100644
--- a/arch/s390/kernel/vtime.c
+++ b/arch/s390/kernel/vtime.c
@@ -121,32 +121,35 @@ void account_system_vtime(struct task_struct *tsk)
}
EXPORT_SYMBOL_GPL(account_system_vtime);
-void vtime_start_cpu(void)
+void vtime_start_cpu(__u64 int_clock, __u64 enter_timer)
{
struct s390_idle_data *idle = &__get_cpu_var(s390_idle);
struct vtimer_queue *vq = &__get_cpu_var(virt_cpu_timer);
__u64 idle_time, expires;
+ if (idle->idle_enter == 0ULL)
+ return;
+
/* Account time spent with enabled wait psw loaded as idle time. */
- idle_time = S390_lowcore.int_clock - idle->idle_enter;
+ idle_time = int_clock - idle->idle_enter;
account_idle_time(idle_time);
S390_lowcore.steal_timer +=
idle->idle_enter - S390_lowcore.last_update_clock;
- S390_lowcore.last_update_clock = S390_lowcore.int_clock;
+ S390_lowcore.last_update_clock = int_clock;
/* Account system time spent going idle. */
S390_lowcore.system_timer += S390_lowcore.last_update_timer - vq->idle;
- S390_lowcore.last_update_timer = S390_lowcore.async_enter_timer;
+ S390_lowcore.last_update_timer = enter_timer;
/* Restart vtime CPU timer */
if (vq->do_spt) {
/* Program old expire value but first save progress. */
- expires = vq->idle - S390_lowcore.async_enter_timer;
+ expires = vq->idle - enter_timer;
expires += get_vtimer();
set_vtimer(expires);
} else {
/* Don't account the CPU timer delta while the cpu was idle. */
- vq->elapsed -= vq->idle - S390_lowcore.async_enter_timer;
+ vq->elapsed -= vq->idle - enter_timer;
}
idle->sequence++;
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-24 22:02:08 +0300