__u32 save_area_sync[8]; /* 0x0200 */
__u32 save_area_async[8]; /* 0x0220 */
__u32 save_area_restart[1]; /* 0x0240 */
- __u8 pad_0x0244[0x0248-0x0244]; /* 0x0244 */
+
+ /* CPU flags. */
+ __u32 cpu_flags; /* 0x0244 */
/* Return psws. */
psw_t return_psw; /* 0x0248 */
__u64 save_area_sync[8]; /* 0x0200 */
__u64 save_area_async[8]; /* 0x0240 */
__u64 save_area_restart[1]; /* 0x0280 */
- __u8 pad_0x0288[0x0290-0x0288]; /* 0x0288 */
+
+ /* CPU flags. */
+ __u64 cpu_flags; /* 0x0288 */
/* Return psws. */
psw_t return_psw; /* 0x0290 */
S390_lowcore.user_asce = mm->context.asce_bits | __pa(pgd);
set_fs(current->thread.mm_segment);
- set_thread_flag(TIF_ASCE);
+ set_cpu_flag(CIF_ASCE);
}
static inline void clear_user_asce(void)
__ctl_store(asce, 1, 1);
if (asce != S390_lowcore.kernel_asce)
__ctl_load(S390_lowcore.kernel_asce, 1, 1);
- set_thread_flag(TIF_ASCE);
+ set_cpu_flag(CIF_ASCE);
}
static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next,
__ctl_load(S390_lowcore.kernel_asce, 1, 1);
__ctl_load(S390_lowcore.kernel_asce, 7, 7);
/* Delay loading of the new ASCE to control registers CR1 & CR7 */
- set_thread_flag(TIF_ASCE);
+ set_cpu_flag(CIF_ASCE);
atomic_inc(&next->context.attach_count);
atomic_dec(&prev->context.attach_count);
if (MACHINE_HAS_TLB_LC)
#ifndef __ASM_S390_PROCESSOR_H
#define __ASM_S390_PROCESSOR_H
+#define CIF_MCCK_PENDING 0 /* machine check handling is pending */
+#define CIF_ASCE 1 /* user asce needs fixup / uaccess */
+
+#define _CIF_MCCK_PENDING (1<<CIF_MCCK_PENDING)
+#define _CIF_ASCE (1<<CIF_ASCE)
+
+
#ifndef __ASSEMBLY__
#include <linux/linkage.h>
#include <asm/setup.h>
#include <asm/runtime_instr.h>
+static inline void set_cpu_flag(int flag)
+{
+ S390_lowcore.cpu_flags |= (1U << flag);
+}
+
+static inline void clear_cpu_flag(int flag)
+{
+ S390_lowcore.cpu_flags &= ~(1U << flag);
+}
+
+static inline int test_cpu_flag(int flag)
+{
+ return !!(S390_lowcore.cpu_flags & (1U << flag));
+}
+
/*
* Default implementation of macro that returns current
* instruction pointer ("program counter").
#include <uapi/asm/ptrace.h>
+#define PIF_SYSCALL 0 /* inside a system call */
+#define PIF_PER_TRAP 1 /* deliver sigtrap on return to user */
+
+#define _PIF_SYSCALL (1<<PIF_SYSCALL)
+#define _PIF_PER_TRAP (1<<PIF_PER_TRAP)
+
#ifndef __ASSEMBLY__
#define PSW_KERNEL_BITS (PSW_DEFAULT_KEY | PSW_MASK_BASE | PSW_ASC_HOME | \
unsigned int int_code;
unsigned int int_parm;
unsigned long int_parm_long;
+ unsigned long flags;
};
/*
#define PER_CONTROL_SUSPENSION 0x00400000UL
#define PER_CONTROL_ALTERATION 0x00200000UL
+static inline void set_pt_regs_flag(struct pt_regs *regs, int flag)
+{
+ regs->flags |= (1U << flag);
+}
+
+static inline void clear_pt_regs_flag(struct pt_regs *regs, int flag)
+{
+ regs->flags &= ~(1U << flag);
+}
+
+static inline int test_pt_regs_flag(struct pt_regs *regs, int flag)
+{
+ return !!(regs->flags & (1U << flag));
+}
+
/*
* These are defined as per linux/ptrace.h, which see.
*/
static inline long syscall_get_nr(struct task_struct *task,
struct pt_regs *regs)
{
- return test_tsk_thread_flag(task, TIF_SYSCALL) ?
+ return test_pt_regs_flag(regs, PIF_SYSCALL) ?
(regs->int_code & 0xffff) : -1;
}
/*
* thread information flags bit numbers
*/
-#define TIF_SYSCALL 0 /* inside a system call */
-#define TIF_NOTIFY_RESUME 1 /* callback before returning to user */
-#define TIF_SIGPENDING 2 /* signal pending */
-#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
-#define TIF_ASCE 5 /* user asce needs fixup / uaccess */
-#define TIF_PER_TRAP 6 /* deliver sigtrap on return to user */
-#define TIF_MCCK_PENDING 7 /* machine check handling is pending */
-#define TIF_SYSCALL_TRACE 8 /* syscall trace active */
-#define TIF_SYSCALL_AUDIT 9 /* syscall auditing active */
-#define TIF_SECCOMP 10 /* secure computing */
-#define TIF_SYSCALL_TRACEPOINT 11 /* syscall tracepoint instrumentation */
-#define TIF_31BIT 17 /* 32bit process */
-#define TIF_MEMDIE 18 /* is terminating due to OOM killer */
-#define TIF_RESTORE_SIGMASK 19 /* restore signal mask in do_signal() */
-#define TIF_SINGLE_STEP 20 /* This task is single stepped */
-#define TIF_BLOCK_STEP 21 /* This task is block stepped */
+#define TIF_NOTIFY_RESUME 0 /* callback before returning to user */
+#define TIF_SIGPENDING 1 /* signal pending */
+#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
+#define TIF_SYSCALL_TRACE 3 /* syscall trace active */
+#define TIF_SYSCALL_AUDIT 4 /* syscall auditing active */
+#define TIF_SECCOMP 5 /* secure computing */
+#define TIF_SYSCALL_TRACEPOINT 6 /* syscall tracepoint instrumentation */
+#define TIF_31BIT 16 /* 32bit process */
+#define TIF_MEMDIE 17 /* is terminating due to OOM killer */
+#define TIF_RESTORE_SIGMASK 18 /* restore signal mask in do_signal() */
+#define TIF_SINGLE_STEP 19 /* This task is single stepped */
+#define TIF_BLOCK_STEP 20 /* This task is block stepped */
-#define _TIF_SYSCALL (1<<TIF_SYSCALL)
#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
-#define _TIF_ASCE (1<<TIF_ASCE)
-#define _TIF_PER_TRAP (1<<TIF_PER_TRAP)
-#define _TIF_MCCK_PENDING (1<<TIF_MCCK_PENDING)
#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
#define _TIF_SYSCALL_AUDIT (1<<TIF_SYSCALL_AUDIT)
#define _TIF_SECCOMP (1<<TIF_SECCOMP)
DEFINE(__PT_INT_CODE, offsetof(struct pt_regs, int_code));
DEFINE(__PT_INT_PARM, offsetof(struct pt_regs, int_parm));
DEFINE(__PT_INT_PARM_LONG, offsetof(struct pt_regs, int_parm_long));
+ DEFINE(__PT_FLAGS, offsetof(struct pt_regs, flags));
DEFINE(__PT_SIZE, sizeof(struct pt_regs));
BLANK();
DEFINE(__SF_BACKCHAIN, offsetof(struct stack_frame, back_chain));
DEFINE(__LC_SAVE_AREA_SYNC, offsetof(struct _lowcore, save_area_sync));
DEFINE(__LC_SAVE_AREA_ASYNC, offsetof(struct _lowcore, save_area_async));
DEFINE(__LC_SAVE_AREA_RESTART, offsetof(struct _lowcore, save_area_restart));
+ DEFINE(__LC_CPU_FLAGS, offsetof(struct _lowcore, cpu_flags));
DEFINE(__LC_RETURN_PSW, offsetof(struct _lowcore, return_psw));
DEFINE(__LC_RETURN_MCCK_PSW, offsetof(struct _lowcore, return_mcck_psw));
DEFINE(__LC_SYNC_ENTER_TIMER, offsetof(struct _lowcore, sync_enter_timer));
sizeof(current->thread.fp_regs));
restore_fp_regs(current->thread.fp_regs.fprs);
- clear_thread_flag(TIF_SYSCALL); /* No longer in a system call */
+ clear_pt_regs_flag(regs, PIF_SYSCALL); /* No longer in a system call */
return 0;
}
#include <linux/init.h>
#include <linux/linkage.h>
+#include <asm/processor.h>
#include <asm/cache.h>
#include <asm/errno.h>
#include <asm/ptrace.h>
__PT_R14 = __PT_GPRS + 56
__PT_R15 = __PT_GPRS + 60
-_TIF_WORK_SVC = (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | _TIF_NEED_RESCHED | \
- _TIF_MCCK_PENDING | _TIF_PER_TRAP | _TIF_ASCE)
-_TIF_WORK_INT = (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | _TIF_NEED_RESCHED | \
- _TIF_MCCK_PENDING | _TIF_ASCE)
-_TIF_TRACE = (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | _TIF_SECCOMP | \
- _TIF_SYSCALL_TRACEPOINT)
-_TIF_TRANSFER = (_TIF_MCCK_PENDING | _TIF_ASCE)
-
STACK_SHIFT = PAGE_SHIFT + THREAD_ORDER
STACK_SIZE = 1 << STACK_SHIFT
STACK_INIT = STACK_SIZE - STACK_FRAME_OVERHEAD - __PT_SIZE
+_TIF_WORK = (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | _TIF_NEED_RESCHED)
+_TIF_TRACE = (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | _TIF_SECCOMP | \
+ _TIF_SYSCALL_TRACEPOINT)
+_CIF_WORK = (_CIF_MCCK_PENDING | _CIF_ASCE)
+_PIF_WORK = (_PIF_PER_TRAP)
+
#define BASED(name) name-system_call(%r13)
.macro TRACE_IRQS_ON
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
- lhi %r6,_TIF_TRANSFER # transfer TIF bits
- n %r6,__TI_flags(%r4) # isolate TIF bits
- jz 0f
- o %r6,__TI_flags(%r5) # set TIF bits of next
- st %r6,__TI_flags(%r5)
- ni __TI_flags+3(%r4),255-_TIF_TRANSFER # clear TIF bits of prev
-0: lm %r6,%r15,__SF_GPRS(%r15) # load gprs of next task
+ lm %r6,%r15,__SF_GPRS(%r15) # load gprs of next task
br %r14
__critical_start:
stm %r8,%r15,__LC_SAVE_AREA_SYNC
l %r12,__LC_THREAD_INFO
l %r13,__LC_SVC_NEW_PSW+4
+ lhi %r14,_PIF_SYSCALL
sysc_per:
l %r15,__LC_KERNEL_STACK
la %r11,STACK_FRAME_OVERHEAD(%r15) # pointer to pt_regs
mvc __PT_R8(32,%r11),__LC_SAVE_AREA_SYNC
mvc __PT_PSW(8,%r11),__LC_SVC_OLD_PSW
mvc __PT_INT_CODE(4,%r11),__LC_SVC_ILC
+ st %r14,__PT_FLAGS(%r11)
sysc_do_svc:
- oi __TI_flags+3(%r12),_TIF_SYSCALL
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
st %r2,__PT_ORIG_GPR2(%r11)
st %r7,STACK_FRAME_OVERHEAD(%r15)
l %r9,0(%r8,%r10) # get system call addr.
- tm __TI_flags+2(%r12),_TIF_TRACE >> 8
+ tm __TI_flags+3(%r12),_TIF_TRACE
jnz sysc_tracesys
basr %r14,%r9 # call sys_xxxx
st %r2,__PT_R2(%r11) # store return value
sysc_tif:
tm __PT_PSW+1(%r11),0x01 # returning to user ?
jno sysc_restore
- tm __TI_flags+3(%r12),_TIF_WORK_SVC
- jnz sysc_work # check for work
- ni __TI_flags+3(%r12),255-_TIF_SYSCALL
+ tm __PT_FLAGS+3(%r11),_PIF_WORK
+ jnz sysc_work
+ tm __TI_flags+3(%r12),_TIF_WORK
+ jnz sysc_work # check for thread work
+ tm __LC_CPU_FLAGS+3,_CIF_WORK
+ jnz sysc_work
sysc_restore:
mvc __LC_RETURN_PSW(8),__PT_PSW(%r11)
stpt __LC_EXIT_TIMER
# One of the work bits is on. Find out which one.
#
sysc_work:
- tm __TI_flags+3(%r12),_TIF_MCCK_PENDING
+ tm __LC_CPU_FLAGS+3,_CIF_MCCK_PENDING
jo sysc_mcck_pending
tm __TI_flags+3(%r12),_TIF_NEED_RESCHED
jo sysc_reschedule
- tm __TI_flags+3(%r12),_TIF_PER_TRAP
+ tm __PT_FLAGS+3(%r11),_PIF_PER_TRAP
jo sysc_singlestep
tm __TI_flags+3(%r12),_TIF_SIGPENDING
jo sysc_sigpending
tm __TI_flags+3(%r12),_TIF_NOTIFY_RESUME
jo sysc_notify_resume
- tm __TI_flags+3(%r12),_TIF_ASCE
+ tm __LC_CPU_FLAGS+3,_CIF_ASCE
jo sysc_uaccess
j sysc_return # beware of critical section cleanup
br %r1 # call schedule
#
-# _TIF_MCCK_PENDING is set, call handler
+# _CIF_MCCK_PENDING is set, call handler
#
sysc_mcck_pending:
l %r1,BASED(.Lhandle_mcck)
br %r1 # TIF bit will be cleared by handler
#
-# _TIF_ASCE is set, load user space asce
+# _CIF_ASCE is set, load user space asce
#
sysc_uaccess:
- ni __TI_flags+3(%r12),255-_TIF_ASCE
+ ni __LC_CPU_FLAGS+3,255-_CIF_ASCE
lctl %c1,%c1,__LC_USER_ASCE # load primary asce
j sysc_return
lr %r2,%r11 # pass pointer to pt_regs
l %r1,BASED(.Ldo_signal)
basr %r14,%r1 # call do_signal
- tm __TI_flags+3(%r12),_TIF_SYSCALL
+ tm __PT_FLAGS+3(%r11),_PIF_SYSCALL
jno sysc_return
lm %r2,%r7,__PT_R2(%r11) # load svc arguments
l %r10,__TI_sysc_table(%r12) # 31 bit system call table
br %r1 # call do_notify_resume
#
-# _TIF_PER_TRAP is set, call do_per_trap
+# _PIF_PER_TRAP is set, call do_per_trap
#
sysc_singlestep:
- ni __TI_flags+3(%r12),255-_TIF_PER_TRAP
+ ni __PT_FLAGS+3(%r11),255-_PIF_PER_TRAP
lr %r2,%r11 # pass pointer to pt_regs
l %r1,BASED(.Ldo_per_trap)
la %r14,BASED(sysc_return)
basr %r14,%r9 # call sys_xxx
st %r2,__PT_R2(%r11) # store return value
sysc_tracenogo:
- tm __TI_flags+2(%r12),_TIF_TRACE >> 8
+ tm __TI_flags+3(%r12),_TIF_TRACE
jz sysc_return
l %r1,BASED(.Ltrace_exit)
lr %r2,%r11 # pass pointer to pt_regs
stm %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)
tm __LC_PGM_ILC+3,0x80 # check for per exception
jz 0f
l %r1,__TI_task(%r12)
tmh %r8,0x0001 # kernel per event ?
jz pgm_kprobe
- oi __TI_flags+3(%r12),_TIF_PER_TRAP
+ 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_CAUSE
mvc __THREAD_per_paid(1,%r1),__LC_PER_PAID
# single stepped system call
#
pgm_svcper:
- oi __TI_flags+3(%r12),_TIF_PER_TRAP
mvc __LC_RETURN_PSW(4),__LC_SVC_NEW_PSW
mvc __LC_RETURN_PSW+4(4),BASED(.Lsysc_per)
+ lhi %r14,_PIF_SYSCALL | _PIF_PER_TRAP
lpsw __LC_RETURN_PSW # branch to sysc_per and enable irqs
/*
mvc __PT_R8(32,%r11),__LC_SAVE_AREA_ASYNC
stm %r8,%r9,__PT_PSW(%r11)
mvc __PT_INT_CODE(12,%r11),__LC_SUBCHANNEL_ID
+ xc __PT_FLAGS(4,%r11),__PT_FLAGS(%r11)
TRACE_IRQS_OFF
xc __SF_BACKCHAIN(4,%r15),__SF_BACKCHAIN(%r15)
io_loop:
LOCKDEP_SYS_EXIT
TRACE_IRQS_ON
io_tif:
- tm __TI_flags+3(%r12),_TIF_WORK_INT
+ tm __TI_flags+3(%r12),_TIF_WORK
jnz io_work # there is work to do (signals etc.)
+ tm __LC_CPU_FLAGS+3,_CIF_WORK
+ jnz io_work
io_restore:
mvc __LC_RETURN_PSW(8),__PT_PSW(%r11)
stpt __LC_EXIT_TIMER
#
# There is work todo, find out in which context we have been interrupted:
-# 1) if we return to user space we can do all _TIF_WORK_INT work
+# 1) if we return to user space we can do all _TIF_WORK work
# 2) if we return to kernel code and 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.
#
# One of the work bits is on. Find out which one.
-# Checked are: _TIF_SIGPENDING, _TIF_NOTIFY_RESUME, _TIF_NEED_RESCHED
-# and _TIF_MCCK_PENDING
#
io_work_tif:
- tm __TI_flags+3(%r12),_TIF_MCCK_PENDING
+ tm __LC_CPU_FLAGS+3(%r12),_CIF_MCCK_PENDING
jo io_mcck_pending
tm __TI_flags+3(%r12),_TIF_NEED_RESCHED
jo io_reschedule
jo io_sigpending
tm __TI_flags+3(%r12),_TIF_NOTIFY_RESUME
jo io_notify_resume
- tm __TI_flags+3(%r12),_TIF_ASCE
+ tm __LC_CPU_FLAGS+3,_CIF_ASCE
jo io_uaccess
j io_return # beware of critical section cleanup
#
-# _TIF_MCCK_PENDING is set, call handler
+# _CIF_MCCK_PENDING is set, call handler
#
io_mcck_pending:
# TRACE_IRQS_ON already done at io_return
j io_return
#
-# _TIF_ASCE is set, load user space asce
+# _CIF_ASCE is set, load user space asce
#
io_uaccess:
- ni __TI_flags+3(%r12),255-_TIF_ASCE
+ ni __LC_CPU_FLAGS+3,255-_CIF_ASCE
lctl %c1,%c1,__LC_USER_ASCE # load primary asce
j io_return
stm %r8,%r9,__PT_PSW(%r11)
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)
TRACE_IRQS_OFF
l %r1,BASED(.Ldo_IRQ)
lr %r2,%r11 # pass pointer to pt_regs
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(.Ldo_machine_check)
lr %r2,%r11 # pass pointer to pt_regs
la %r11,STACK_FRAME_OVERHEAD(%r15)
lr %r15,%r1
ssm __LC_PGM_NEW_PSW # turn dat on, keep irqs off
- tm __TI_flags+3(%r12),_TIF_MCCK_PENDING
+ tm __LC_CPU_FLAGS+3,_CIF_MCCK_PENDING
jno mcck_return
TRACE_IRQS_OFF
l %r1,BASED(.Lhandle_mcck)
stm %r0,%r7,__PT_R0(%r9)
mvc __PT_PSW(8,%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
# set new psw address and exit
STACK_SIZE = 1 << STACK_SHIFT
STACK_INIT = STACK_SIZE - STACK_FRAME_OVERHEAD - __PT_SIZE
-_TIF_WORK_SVC = (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | _TIF_NEED_RESCHED | \
- _TIF_MCCK_PENDING | _TIF_PER_TRAP | _TIF_ASCE)
-_TIF_WORK_INT = (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | _TIF_NEED_RESCHED | \
- _TIF_MCCK_PENDING | _TIF_ASCE)
-_TIF_TRACE = (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | _TIF_SECCOMP | \
- _TIF_SYSCALL_TRACEPOINT)
-_TIF_TRANSFER = (_TIF_MCCK_PENDING | _TIF_ASCE)
+_TIF_WORK = (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | _TIF_NEED_RESCHED)
+_TIF_TRACE = (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | _TIF_SECCOMP | \
+ _TIF_SYSCALL_TRACEPOINT)
+_CIF_WORK = (_CIF_MCCK_PENDING | _CIF_ASCE)
+_PIF_WORK = (_PIF_PER_TRAP)
#define BASED(name) name-system_call(%r13)
lctl %c4,%c4,__TASK_pid(%r3) # load pid to control reg. 4
mvc __LC_CURRENT_PID+4(4,%r0),__TASK_pid(%r3) # store pid of next
lg %r15,__THREAD_ksp(%r3) # load kernel stack of next
- llill %r6,_TIF_TRANSFER # transfer TIF bits
- ng %r6,__TI_flags(%r4) # isolate TIF bits
- jz 0f
- og %r6,__TI_flags(%r5) # set TIF bits of next
- stg %r6,__TI_flags(%r5)
- ni __TI_flags+7(%r4),255-_TIF_TRANSFER # clear TIF bits of prev
-0: lmg %r6,%r15,__SF_GPRS(%r15) # load gprs of next task
+ lmg %r6,%r15,__SF_GPRS(%r15) # load gprs of next task
br %r14
__critical_start:
stmg %r8,%r15,__LC_SAVE_AREA_SYNC
lg %r10,__LC_LAST_BREAK
lg %r12,__LC_THREAD_INFO
+ lghi %r14,_PIF_SYSCALL
sysc_per:
lg %r15,__LC_KERNEL_STACK
la %r11,STACK_FRAME_OVERHEAD(%r15) # pointer to pt_regs
mvc __PT_R8(64,%r11),__LC_SAVE_AREA_SYNC
mvc __PT_PSW(16,%r11),__LC_SVC_OLD_PSW
mvc __PT_INT_CODE(4,%r11),__LC_SVC_ILC
+ stg %r14,__PT_FLAGS(%r11)
sysc_do_svc:
- oi __TI_flags+7(%r12),_TIF_SYSCALL
lg %r10,__TI_sysc_table(%r12) # address of system call table
llgh %r8,__PT_INT_CODE+2(%r11)
slag %r8,%r8,2 # shift and test for svc 0
stg %r2,__PT_ORIG_GPR2(%r11)
stg %r7,STACK_FRAME_OVERHEAD(%r15)
lgf %r9,0(%r8,%r10) # get system call add.
- tm __TI_flags+6(%r12),_TIF_TRACE >> 8
+ tm __TI_flags+7(%r12),_TIF_TRACE
jnz sysc_tracesys
basr %r14,%r9 # call sys_xxxx
stg %r2,__PT_R2(%r11) # store return value
sysc_tif:
tm __PT_PSW+1(%r11),0x01 # returning to user ?
jno sysc_restore
- tm __TI_flags+7(%r12),_TIF_WORK_SVC
+ tm __PT_FLAGS+7(%r11),_PIF_WORK
+ jnz sysc_work
+ tm __TI_flags+7(%r12),_TIF_WORK
jnz sysc_work # check for work
- ni __TI_flags+7(%r12),255-_TIF_SYSCALL
+ tm __LC_CPU_FLAGS+7,_CIF_WORK
+ jnz sysc_work
sysc_restore:
lg %r14,__LC_VDSO_PER_CPU
lmg %r0,%r10,__PT_R0(%r11)
# One of the work bits is on. Find out which one.
#
sysc_work:
- tm __TI_flags+7(%r12),_TIF_MCCK_PENDING
+ tm __LC_CPU_FLAGS+7,_CIF_MCCK_PENDING
jo sysc_mcck_pending
tm __TI_flags+7(%r12),_TIF_NEED_RESCHED
jo sysc_reschedule
- tm __TI_flags+7(%r12),_TIF_PER_TRAP
+ tm __PT_FLAGS+7(%r11),_PIF_PER_TRAP
jo sysc_singlestep
tm __TI_flags+7(%r12),_TIF_SIGPENDING
jo sysc_sigpending
tm __TI_flags+7(%r12),_TIF_NOTIFY_RESUME
jo sysc_notify_resume
- tm __TI_flags+7(%r12),_TIF_ASCE
+ tm __LC_CPU_FLAGS+7,_CIF_ASCE
jo sysc_uaccess
j sysc_return # beware of critical section cleanup
jg schedule
#
-# _TIF_MCCK_PENDING is set, call handler
+# _CIF_MCCK_PENDING is set, call handler
#
sysc_mcck_pending:
larl %r14,sysc_return
jg s390_handle_mcck # TIF bit will be cleared by handler
#
-# _TIF_ASCE is set, load user space asce
+# _CIF_ASCE is set, load user space asce
#
sysc_uaccess:
- ni __TI_flags+7(%r12),255-_TIF_ASCE
+ ni __LC_CPU_FLAGS+7,255-_CIF_ASCE
lctlg %c1,%c1,__LC_USER_ASCE # load primary asce
j sysc_return
sysc_sigpending:
lgr %r2,%r11 # pass pointer to pt_regs
brasl %r14,do_signal
- tm __TI_flags+7(%r12),_TIF_SYSCALL
+ tm __PT_FLAGS+7(%r11),_PIF_SYSCALL
jno sysc_return
lmg %r2,%r7,__PT_R2(%r11) # load svc arguments
lg %r10,__TI_sysc_table(%r12) # address of system call table
jg do_notify_resume
#
-# _TIF_PER_TRAP is set, call do_per_trap
+# _PIF_PER_TRAP is set, call do_per_trap
#
sysc_singlestep:
- ni __TI_flags+7(%r12),255-_TIF_PER_TRAP
+ ni __PT_FLAGS+7(%r11),255-_PIF_PER_TRAP
lgr %r2,%r11 # pass pointer to pt_regs
larl %r14,sysc_return
jg do_per_trap
basr %r14,%r9 # call sys_xxx
stg %r2,__PT_R2(%r11) # store return value
sysc_tracenogo:
- tm __TI_flags+6(%r12),_TIF_TRACE >> 8
+ tm __TI_flags+7(%r12),_TIF_TRACE
jz sysc_return
lgr %r2,%r11 # pass pointer to pt_regs
larl %r14,sysc_return
stmg %r8,%r9,__PT_PSW(%r11)
mvc __PT_INT_CODE(4,%r11),__LC_PGM_ILC
mvc __PT_INT_PARM_LONG(8,%r11),__LC_TRANS_EXC_CODE
+ xc __PT_FLAGS(8,%r11),__PT_FLAGS(%r11)
stg %r10,__PT_ARGS(%r11)
tm __LC_PGM_ILC+3,0x80 # check for per exception
jz 0f
tmhh %r8,0x0001 # kernel per event ?
jz pgm_kprobe
- oi __TI_flags+7(%r12),_TIF_PER_TRAP
+ oi __PT_FLAGS+7(%r11),_PIF_PER_TRAP
mvc __THREAD_per_address(8,%r14),__LC_PER_ADDRESS
mvc __THREAD_per_cause(2,%r14),__LC_PER_CAUSE
mvc __THREAD_per_paid(1,%r14),__LC_PER_PAID
# single stepped system call
#
pgm_svcper:
- oi __TI_flags+7(%r12),_TIF_PER_TRAP
mvc __LC_RETURN_PSW(8),__LC_SVC_NEW_PSW
larl %r14,sysc_per
stg %r14,__LC_RETURN_PSW+8
+ lghi %r14,_PIF_SYSCALL | _PIF_PER_TRAP
lpswe __LC_RETURN_PSW # branch to sysc_per and enable irqs
/*
mvc __PT_R8(64,%r11),__LC_SAVE_AREA_ASYNC
stmg %r8,%r9,__PT_PSW(%r11)
mvc __PT_INT_CODE(12,%r11),__LC_SUBCHANNEL_ID
+ xc __PT_FLAGS(8,%r11),__PT_FLAGS(%r11)
TRACE_IRQS_OFF
xc __SF_BACKCHAIN(8,%r15),__SF_BACKCHAIN(%r15)
io_loop:
LOCKDEP_SYS_EXIT
TRACE_IRQS_ON
io_tif:
- tm __TI_flags+7(%r12),_TIF_WORK_INT
+ tm __TI_flags+7(%r12),_TIF_WORK
jnz io_work # there is work to do (signals etc.)
+ tm __LC_CPU_FLAGS+7,_CIF_WORK
+ jnz io_work
io_restore:
lg %r14,__LC_VDSO_PER_CPU
lmg %r0,%r10,__PT_R0(%r11)
#
# There is work todo, find out in which context we have been interrupted:
-# 1) if we return to user space we can do all _TIF_WORK_INT work
+# 1) if we return to user space we can do all _TIF_WORK work
# 2) if we return to kernel code and kvm is enabled check if we need to
# modify the psw to leave SIE
# 3) if we return to kernel code and preemptive scheduling is enabled check
#
# One of the work bits is on. Find out which one.
-# Checked are: _TIF_SIGPENDING, _TIF_NOTIFY_RESUME, _TIF_NEED_RESCHED
-# and _TIF_MCCK_PENDING
#
io_work_tif:
- tm __TI_flags+7(%r12),_TIF_MCCK_PENDING
+ tm __LC_CPU_FLAGS+7,_CIF_MCCK_PENDING
jo io_mcck_pending
tm __TI_flags+7(%r12),_TIF_NEED_RESCHED
jo io_reschedule
jo io_sigpending
tm __TI_flags+7(%r12),_TIF_NOTIFY_RESUME
jo io_notify_resume
- tm __TI_flags+7(%r12),_TIF_ASCE
+ tm __LC_CPU_FLAGS+7,_CIF_ASCE
jo io_uaccess
j io_return # beware of critical section cleanup
#
-# _TIF_MCCK_PENDING is set, call handler
+# _CIF_MCCK_PENDING is set, call handler
#
io_mcck_pending:
# TRACE_IRQS_ON already done at io_return
j io_return
#
-# _TIF_ASCE is set, load user space asce
+# _CIF_ASCE is set, load user space asce
#
io_uaccess:
- ni __TI_flags+7(%r12),255-_TIF_ASCE
+ ni __LC_CPU_FLAGS+7,255-_CIF_ASCE
lctlg %c1,%c1,__LC_USER_ASCE # load primary asce
j io_return
mvc __PT_INT_CODE(4,%r11),__LC_EXT_CPU_ADDR
mvc __PT_INT_PARM(4,%r11),__LC_EXT_PARAMS
mvc __PT_INT_PARM_LONG(8,%r11),0(%r1)
+ xc __PT_FLAGS(8,%r11),__PT_FLAGS(%r11)
TRACE_IRQS_OFF
xc __SF_BACKCHAIN(8,%r15),__SF_BACKCHAIN(%r15)
lgr %r2,%r11 # pass pointer to pt_regs
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
la %r11,STACK_FRAME_OVERHEAD(%r1)
lgr %r15,%r1
ssm __LC_PGM_NEW_PSW # turn dat on, keep irqs off
- tm __TI_flags+7(%r12),_TIF_MCCK_PENDING
+ tm __LC_CPU_FLAGS+7,_CIF_MCCK_PENDING
jno mcck_return
TRACE_IRQS_OFF
brasl %r14,s390_handle_mcck
stmg %r0,%r7,__PT_R0(%r9)
mvc __PT_PSW(16,%r9),__LC_SVC_OLD_PSW
mvc __PT_INT_CODE(4,%r9),__LC_SVC_ILC
+ xc __PT_FLAGS(8,%r9),__PT_FLAGS(%r9)
+ mvi __PT_FLAGS+7(%r9),_PIF_SYSCALL
# setup saved register r15
stg %r15,56(%r11) # r15 stack pointer
# set new psw address and exit
local_mcck_disable();
mcck = __get_cpu_var(cpu_mcck);
memset(&__get_cpu_var(cpu_mcck), 0, sizeof(struct mcck_struct));
- clear_thread_flag(TIF_MCCK_PENDING);
+ clear_cpu_flag(CIF_MCCK_PENDING);
local_mcck_enable();
local_irq_restore(flags);
*/
mcck->kill_task = 1;
mcck->mcck_code = *(unsigned long long *) mci;
- set_thread_flag(TIF_MCCK_PENDING);
+ set_cpu_flag(CIF_MCCK_PENDING);
} else {
/*
* Couldn't restore all register contents while in
if (mci->cp) {
/* Channel report word pending */
mcck->channel_report = 1;
- set_thread_flag(TIF_MCCK_PENDING);
+ set_cpu_flag(CIF_MCCK_PENDING);
}
if (mci->w) {
/* Warning pending */
mcck->warning = 1;
- set_thread_flag(TIF_MCCK_PENDING);
+ set_cpu_flag(CIF_MCCK_PENDING);
}
nmi_exit();
}
void arch_cpu_idle(void)
{
local_mcck_disable();
- if (test_thread_flag(TIF_MCCK_PENDING)) {
+ if (test_cpu_flag(CIF_MCCK_PENDING)) {
local_mcck_enable();
local_irq_enable();
return;
void arch_cpu_idle_exit(void)
{
- if (test_thread_flag(TIF_MCCK_PENDING))
+ if (test_cpu_flag(CIF_MCCK_PENDING))
s390_handle_mcck();
}
memset(&p->thread.per_user, 0, sizeof(p->thread.per_user));
memset(&p->thread.per_event, 0, sizeof(p->thread.per_event));
clear_tsk_thread_flag(p, TIF_SINGLE_STEP);
- clear_tsk_thread_flag(p, TIF_PER_TRAP);
/* Initialize per thread user and system timer values */
ti = task_thread_info(p);
ti->user_timer = 0;
}
frame->childregs = *current_pt_regs();
frame->childregs.gprs[2] = 0; /* child returns 0 on fork. */
+ frame->childregs.flags = 0;
if (new_stackp)
frame->childregs.gprs[15] = new_stackp;
memset(&task->thread.per_user, 0, sizeof(task->thread.per_user));
memset(&task->thread.per_event, 0, sizeof(task->thread.per_event));
clear_tsk_thread_flag(task, TIF_SINGLE_STEP);
- clear_tsk_thread_flag(task, TIF_PER_TRAP);
+ clear_pt_regs_flag(task_pt_regs(task), PIF_PER_TRAP);
task->thread.per_flags = 0;
}
* debugger stored an invalid system call number. Skip
* the system call and the system call restart handling.
*/
- clear_thread_flag(TIF_SYSCALL);
+ clear_pt_regs_flag(regs, PIF_SYSCALL);
ret = -1;
}
sizeof(current->thread.fp_regs));
restore_fp_regs(current->thread.fp_regs.fprs);
- clear_thread_flag(TIF_SYSCALL); /* No longer in a system call */
+ clear_pt_regs_flag(regs, PIF_SYSCALL); /* No longer in a system call */
return 0;
}
* call information.
*/
current_thread_info()->system_call =
- test_thread_flag(TIF_SYSCALL) ? regs->int_code : 0;
+ test_pt_regs_flag(regs, PIF_SYSCALL) ? regs->int_code : 0;
signr = get_signal_to_deliver(&info, &ka, regs, NULL);
if (signr > 0) {
}
}
/* No longer in a system call */
- clear_thread_flag(TIF_SYSCALL);
+ clear_pt_regs_flag(regs, PIF_SYSCALL);
if (is_compat_task())
handle_signal32(signr, &ka, &info, oldset, regs);
}
/* No handlers present - check for system call restart */
- clear_thread_flag(TIF_SYSCALL);
+ clear_pt_regs_flag(regs, PIF_SYSCALL);
if (current_thread_info()->system_call) {
regs->int_code = current_thread_info()->system_call;
switch (regs->gprs[2]) {
case -ERESTARTNOINTR:
/* Restart system call with magic TIF bit. */
regs->gprs[2] = regs->orig_gpr2;
- set_thread_flag(TIF_SYSCALL);
+ set_pt_regs_flag(regs, PIF_SYSCALL);
if (test_thread_flag(TIF_SINGLE_STEP))
- set_thread_flag(TIF_PER_TRAP);
+ clear_pt_regs_flag(regs, PIF_PER_TRAP);
break;
}
}
if (need_resched())
schedule();
- if (test_thread_flag(TIF_MCCK_PENDING))
+ if (test_cpu_flag(CIF_MCCK_PENDING))
s390_handle_mcck();
if (!kvm_is_ucontrol(vcpu->kvm))
* The instruction that caused the program check has
* been nullified. Don't signal single step via SIGTRAP.
*/
- clear_tsk_thread_flag(tsk, TIF_PER_TRAP);
+ clear_pt_regs_flag(regs, PIF_PER_TRAP);
if (notify_page_fault(regs))
return 0;
projects / karo-tx-linux.git / commitdiff