diff options
Diffstat (limited to 'arch/s390/kernel/entry.S')
| -rw-r--r-- | arch/s390/kernel/entry.S | 48 |
1 files changed, 33 insertions, 15 deletions
diff --git a/arch/s390/kernel/entry.S b/arch/s390/kernel/entry.S index f498d201f98d..9e5f6cd8e4c2 100644 --- a/arch/s390/kernel/entry.S +++ b/arch/s390/kernel/entry.S @@ -180,18 +180,17 @@ _PIF_WORK = (_PIF_PER_TRAP | _PIF_SYSCALL_RESTART) */ ENTRY(__switch_to) stmg %r6,%r15,__SF_GPRS(%r15) # store gprs of prev task - lgr %r1,%r2 - aghi %r1,__TASK_thread # thread_struct of prev task - lg %r5,__TASK_stack(%r3) # start of kernel stack of next - stg %r15,__THREAD_ksp(%r1) # store kernel stack of prev - lgr %r1,%r3 - aghi %r1,__TASK_thread # thread_struct of next task + lghi %r4,__TASK_stack + lghi %r1,__TASK_thread + lg %r5,0(%r4,%r3) # start of kernel stack of next + stg %r15,__THREAD_ksp(%r1,%r2) # store kernel stack of prev lgr %r15,%r5 aghi %r15,STACK_INIT # end of kernel stack of next stg %r3,__LC_CURRENT # store task struct of next stg %r15,__LC_KERNEL_STACK # store end of kernel stack - lg %r15,__THREAD_ksp(%r1) # load kernel stack of next - mvc __LC_CURRENT_PID(4,%r0),__TASK_pid(%r3) # store pid of next + lg %r15,__THREAD_ksp(%r1,%r3) # load kernel stack of next + aghi %r3,__TASK_pid + mvc __LC_CURRENT_PID(4,%r0),0(%r3) # store pid of next lmg %r6,%r15,__SF_GPRS(%r15) # load gprs of next task TSTMSK __LC_MACHINE_FLAGS,MACHINE_FLAG_LPP bzr %r14 @@ -379,13 +378,21 @@ ENTRY(system_call) jg s390_handle_mcck # TIF bit will be cleared by handler # -# _CIF_ASCE_PRIMARY and/or CIF_ASCE_SECONDARY set, load user space asce +# _CIF_ASCE_PRIMARY and/or _CIF_ASCE_SECONDARY set, load user space asce # .Lsysc_asce: + ni __LC_CPU_FLAGS+7,255-_CIF_ASCE_SECONDARY + lctlg %c7,%c7,__LC_VDSO_ASCE # load secondary asce + TSTMSK __LC_CPU_FLAGS,_CIF_ASCE_PRIMARY + jz .Lsysc_return +#ifndef CONFIG_HAVE_MARCH_Z10_FEATURES + tm __LC_STFLE_FAC_LIST+3,0x10 # has MVCOS ? + jnz .Lsysc_set_fs_fixup ni __LC_CPU_FLAGS+7,255-_CIF_ASCE_PRIMARY lctlg %c1,%c1,__LC_USER_ASCE # load primary asce - TSTMSK __LC_CPU_FLAGS,_CIF_ASCE_SECONDARY - jz .Lsysc_return + j .Lsysc_return +.Lsysc_set_fs_fixup: +#endif larl %r14,.Lsysc_return jg set_fs_fixup @@ -518,6 +525,7 @@ ENTRY(pgm_check_handler) stmg %r8,%r15,__LC_SAVE_AREA_SYNC lg %r10,__LC_LAST_BREAK lg %r12,__LC_CURRENT + lghi %r11,0 larl %r13,cleanup_critical lmg %r8,%r9,__LC_PGM_OLD_PSW tmhh %r8,0x0001 # test problem state bit @@ -532,6 +540,7 @@ ENTRY(pgm_check_handler) ni __SIE_PROG0C+3(%r14),0xfe # no longer in SIE lctlg %c1,%c1,__LC_USER_ASCE # load primary asce larl %r9,sie_exit # skip forward to sie_exit + lghi %r11,_PIF_GUEST_FAULT #endif 0: tmhh %r8,0x4000 # PER bit set in old PSW ? jnz 1f # -> enabled, can't be a double fault @@ -549,13 +558,14 @@ ENTRY(pgm_check_handler) jz 3f mvc __THREAD_trap_tdb(256,%r14),0(%r13) 3: stg %r10,__THREAD_last_break(%r14) -4: la %r11,STACK_FRAME_OVERHEAD(%r15) +4: lgr %r13,%r11 + la %r11,STACK_FRAME_OVERHEAD(%r15) stmg %r0,%r7,__PT_R0(%r11) mvc __PT_R8(64,%r11),__LC_SAVE_AREA_SYNC stmg %r8,%r9,__PT_PSW(%r11) mvc __PT_INT_CODE(4,%r11),__LC_PGM_ILC mvc __PT_INT_PARM_LONG(8,%r11),__LC_TRANS_EXC_CODE - xc __PT_FLAGS(8,%r11),__PT_FLAGS(%r11) + stg %r13,__PT_FLAGS(%r11) stg %r10,__PT_ARGS(%r11) tm __LC_PGM_ILC+3,0x80 # check for per exception jz 5f @@ -738,10 +748,18 @@ ENTRY(io_int_handler) # _CIF_ASCE_PRIMARY and/or CIF_ASCE_SECONDARY set, load user space asce # .Lio_asce: + ni __LC_CPU_FLAGS+7,255-_CIF_ASCE_SECONDARY + lctlg %c7,%c7,__LC_VDSO_ASCE # load secondary asce + TSTMSK __LC_CPU_FLAGS,_CIF_ASCE_PRIMARY + jz .Lio_return +#ifndef CONFIG_HAVE_MARCH_Z10_FEATURES + tm __LC_STFLE_FAC_LIST+3,0x10 # has MVCOS ? + jnz .Lio_set_fs_fixup ni __LC_CPU_FLAGS+7,255-_CIF_ASCE_PRIMARY lctlg %c1,%c1,__LC_USER_ASCE # load primary asce - TSTMSK __LC_CPU_FLAGS,_CIF_ASCE_SECONDARY - jz .Lio_return + j .Lio_return +.Lio_set_fs_fixup: +#endif larl %r14,.Lio_return jg set_fs_fixup |