9 files changed, 20 insertions, 143 deletions
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index 7a18d2380e2c..8152fefc97b9 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -69,6 +69,9 @@ config PGSTE
        bool
        default y if KVM
+config VIRT_CPU_ACCOUNTING
+        def_bool y
 mainmenu "Linux Kernel Configuration"
 config S390
@@ -469,22 +472,9 @@ config PAGE_STATES
          hypervisor. The ESSA instruction is used to do the states
          changes between a page that has content and the unused state.
-config VIRT_TIMER
-        bool "Virtual CPU timer support"
-        help
-          This provides a kernel interface for virtual CPU timers.
-          Default is disabled.
-config VIRT_CPU_ACCOUNTING
-        bool "Base user process accounting on virtual cpu timer"
-        depends on VIRT_TIMER
-        help
-          Select this option to use CPU timer deltas to do user
-          process accounting.
 config APPLDATA_BASE
        bool "Linux - VM Monitor Stream, base infrastructure"
-        depends on PROC_FS && VIRT_TIMER=y
+        depends on PROC_FS
        help
          This provides a kernel interface for creating and updating z/VM APPLDATA
          monitor records. The monitor records are updated at certain time
diff --git a/arch/s390/include/asm/system.h b/arch/s390/include/asm/system.h
index c17a3cfbe242..024ef42ed6d7 100644
--- a/arch/s390/include/asm/system.h
+++ b/arch/s390/include/asm/system.h
@@ -99,13 +99,9 @@ static inline void restore_access_regs(unsigned int *acrs)
        prev = __switch_to(prev,next);                                       \
 } while (0)
-#ifdef CONFIG_VIRT_CPU_ACCOUNTING
 extern void account_vtime(struct task_struct *);
 extern void account_tick_vtime(struct task_struct *);
 extern void account_system_vtime(struct task_struct *);
-#else
-#define account_vtime(x) do { /* empty */ } while (0)
-#endif
 #ifdef CONFIG_PFAULT
 extern void pfault_irq_init(void);
diff --git a/arch/s390/include/asm/timer.h b/arch/s390/include/asm/timer.h
index d98d79e35cd6..61705d60f995 100644
--- a/arch/s390/include/asm/timer.h
+++ b/arch/s390/include/asm/timer.h
@@ -48,18 +48,9 @@ extern int del_virt_timer(struct vtimer_list *timer);
 extern void init_cpu_vtimer(void);
 extern void vtime_init(void);
-#ifdef CONFIG_VIRT_TIMER
 extern void vtime_start_cpu_timer(void);
 extern void vtime_stop_cpu_timer(void);
-#else
-static inline void vtime_start_cpu_timer(void) { }
-static inline void vtime_stop_cpu_timer(void) { }
-#endif /* CONFIG_VIRT_TIMER */
 #endif /* __KERNEL__ */
 #endif /* _ASM_S390_TIMER_H */
diff --git a/arch/s390/kernel/Makefile b/arch/s390/kernel/Makefile
index 92730cc3cdb4..90dad65c20ec 100644
--- a/arch/s390/kernel/Makefile
+++ b/arch/s390/kernel/Makefile
@@ -20,7 +20,7 @@ CFLAGS_ptrace.o		+= -DUTS_MACHINE='"$(UTS_MACHINE)"'
 obj-y   :=  bitmap.o traps.o time.o process.o base.o early.o \
            setup.o sys_s390.o ptrace.o signal.o cpcmd.o ebcdic.o \
            s390_ext.o debug.o irq.o ipl.o dis.o diag.o mem_detect.o \
-            vdso.o
+            vdso.o vtime.o
 obj-y   += $(if $(CONFIG_64BIT),entry64.o,entry.o)
 obj-y   += $(if $(CONFIG_64BIT),reipl64.o,reipl.o)
@@ -36,7 +36,6 @@ obj-$(CONFIG_COMPAT)		+= compat_linux.o compat_signal.o \
                                        compat_wrapper.o compat_exec_domain.o \
                                        $(compat-obj-y)
-obj-$(CONFIG_VIRT_TIMER)        += vtime.o
 obj-$(CONFIG_STACKTRACE)        += stacktrace.o
 obj-$(CONFIG_KPROBES)           += kprobes.o
 obj-$(CONFIG_FUNCTION_TRACER)   += mcount.o
diff --git a/arch/s390/kernel/entry.S b/arch/s390/kernel/entry.S
index c1cfc7e39ec9..55de521aef77 100644
--- a/arch/s390/kernel/entry.S
+++ b/arch/s390/kernel/entry.S
@@ -109,13 +109,6 @@ STACK_SIZE  = 1 << STACK_SHIFT
 *    R15 - kernel stack pointer
 */
-        .macro  STORE_TIMER lc_offset
-#ifdef CONFIG_VIRT_CPU_ACCOUNTING
-        stpt    \lc_offset
-#endif
-        .endm
-#ifdef CONFIG_VIRT_CPU_ACCOUNTING
        .macro  UPDATE_VTIME lc_from,lc_to,lc_sum
        lm      %r10,%r11,\lc_from
        sl      %r10,\lc_to
@@ -128,7 +121,6 @@ STACK_SIZE  = 1 << STACK_SHIFT
        al      %r10,BASED(.Lc_1)
 1:      stm     %r10,%r11,\lc_sum
        .endm
-#endif
        .macro  SAVE_ALL_BASE savearea
        stm     %r12,%r15,\savearea
@@ -198,7 +190,7 @@ STACK_SIZE  = 1 << STACK_SHIFT
        ni      \psworg+1,0xfd          # clear wait state bit
        .endif
        lm      %r0,%r15,SP_R0(%r15)    # load gprs 0-15 of user
-        STORE_TIMER __LC_EXIT_TIMER
+        stpt    __LC_EXIT_TIMER
        lpsw    \psworg                 # back to caller
        .endm
@@ -247,20 +239,18 @@ __critical_start:
        .globl  system_call
 system_call:
-        STORE_TIMER __LC_SYNC_ENTER_TIMER
+        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
        lh      %r7,0x8a          # get svc number from lowcore
-#ifdef CONFIG_VIRT_CPU_ACCOUNTING
 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
-#endif
 sysc_do_svc:
        l       %r9,__LC_THREAD_INFO    # load pointer to thread_info struct
        ltr     %r7,%r7                 # test for svc 0
@@ -490,20 +480,18 @@ pgm_check_handler:
 * we just ignore the PER event (FIXME: is there anything we have to do
 * for LPSW?).
 */
-        STORE_TIMER __LC_SYNC_ENTER_TIMER
+        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
        bnz     BASED(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
-#ifdef CONFIG_VIRT_CPU_ACCOUNTING
        tm      SP_PSW+1(%r15),0x01     # interrupting from user ?
        bz      BASED(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
 pgm_no_vtime:
-#endif
        l       %r9,__LC_THREAD_INFO    # load pointer to thread_info struct
        TRACE_IRQS_OFF
        l       %r3,__LC_PGM_ILC        # load program interruption code
@@ -536,14 +524,12 @@ pgm_per:
 pgm_per_std:
        SAVE_ALL_SYNC __LC_PGM_OLD_PSW,__LC_SAVE_AREA
        CREATE_STACK_FRAME __LC_PGM_OLD_PSW,__LC_SAVE_AREA
-#ifdef CONFIG_VIRT_CPU_ACCOUNTING
        tm      SP_PSW+1(%r15),0x01     # interrupting from user ?
        bz      BASED(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
 pgm_no_vtime2:
-#endif
        l       %r9,__LC_THREAD_INFO    # load pointer to thread_info struct
        TRACE_IRQS_OFF
        l       %r1,__TI_task(%r9)
@@ -565,11 +551,9 @@ pgm_no_vtime2:
 pgm_svcper:
        SAVE_ALL_SYNC __LC_SVC_OLD_PSW,__LC_SAVE_AREA
        CREATE_STACK_FRAME __LC_SVC_OLD_PSW,__LC_SAVE_AREA
-#ifdef CONFIG_VIRT_CPU_ACCOUNTING
        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
-#endif
        lh      %r7,0x8a                # get svc number from lowcore
        l       %r9,__LC_THREAD_INFO    # load pointer to thread_info struct
        TRACE_IRQS_OFF
@@ -599,19 +583,17 @@ kernel_per:
        .globl io_int_handler
 io_int_handler:
-        STORE_TIMER __LC_ASYNC_ENTER_TIMER
+        stpt    __LC_ASYNC_ENTER_TIMER
        stck    __LC_INT_CLOCK
        SAVE_ALL_BASE __LC_SAVE_AREA+16
        SAVE_ALL_ASYNC __LC_IO_OLD_PSW,__LC_SAVE_AREA+16
        CREATE_STACK_FRAME __LC_IO_OLD_PSW,__LC_SAVE_AREA+16
-#ifdef CONFIG_VIRT_CPU_ACCOUNTING
        tm      SP_PSW+1(%r15),0x01     # interrupting from user ?
        bz      BASED(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
 io_no_vtime:
-#endif
        l       %r9,__LC_THREAD_INFO    # load pointer to thread_info struct
        TRACE_IRQS_OFF
        l       %r1,BASED(.Ldo_IRQ)     # load address of do_IRQ
@@ -741,19 +723,17 @@ io_notify_resume:
        .globl  ext_int_handler
 ext_int_handler:
-        STORE_TIMER __LC_ASYNC_ENTER_TIMER
+        stpt    __LC_ASYNC_ENTER_TIMER
        stck    __LC_INT_CLOCK
        SAVE_ALL_BASE __LC_SAVE_AREA+16
        SAVE_ALL_ASYNC __LC_EXT_OLD_PSW,__LC_SAVE_AREA+16
        CREATE_STACK_FRAME __LC_EXT_OLD_PSW,__LC_SAVE_AREA+16
-#ifdef CONFIG_VIRT_CPU_ACCOUNTING
        tm      SP_PSW+1(%r15),0x01     # interrupting from user ?
        bz      BASED(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
 ext_no_vtime:
-#endif
        l       %r9,__LC_THREAD_INFO    # load pointer to thread_info struct
        TRACE_IRQS_OFF
        la      %r2,SP_PTREGS(%r15)     # address of register-save area
@@ -776,7 +756,6 @@ mcck_int_handler:
        la      %r12,__LC_MCK_OLD_PSW
        tm      __LC_MCCK_CODE,0x80     # system damage?
        bo      BASED(mcck_int_main)    # yes -> rest of mcck code invalid
-#ifdef CONFIG_VIRT_CPU_ACCOUNTING
        mvc     __LC_SAVE_AREA+52(8),__LC_ASYNC_ENTER_TIMER
        mvc     __LC_ASYNC_ENTER_TIMER(8),__LC_CPU_TIMER_SAVE_AREA
        tm      __LC_MCCK_CODE+5,0x02   # stored cpu timer value valid?
@@ -793,9 +772,7 @@ mcck_int_handler:
        la      %r14,__LC_LAST_UPDATE_TIMER
 0:      spt     0(%r14)
        mvc     __LC_ASYNC_ENTER_TIMER(8),0(%r14)
-1:
+1:      tm      __LC_MCCK_CODE+2,0x09   # mwp + ia of old psw valid?
-#endif
-        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
        bnz     BASED(mcck_int_main)    # from user -> load async stack
@@ -812,7 +789,6 @@ mcck_int_main:
        be      BASED(0f)
        l       %r15,__LC_PANIC_STACK   # load panic stack
 0:      CREATE_STACK_FRAME __LC_MCK_OLD_PSW,__LC_SAVE_AREA+32
-#ifdef CONFIG_VIRT_CPU_ACCOUNTING
        tm      __LC_MCCK_CODE+2,0x08   # mwp of old psw valid?
        bno     BASED(mcck_no_vtime)    # no -> skip cleanup critical
        tm      SP_PSW+1(%r15),0x01     # interrupting from user ?
@@ -821,7 +797,6 @@ mcck_int_main:
        UPDATE_VTIME __LC_LAST_UPDATE_TIMER,__LC_EXIT_TIMER,__LC_SYSTEM_TIMER
        mvc     __LC_LAST_UPDATE_TIMER(8),__LC_ASYNC_ENTER_TIMER
 mcck_no_vtime:
-#endif
        l       %r9,__LC_THREAD_INFO    # load pointer to thread_info struct
        la      %r2,SP_PTREGS(%r15)     # load pt_regs
        l       %r1,BASED(.Ls390_mcck)
@@ -843,16 +818,13 @@ 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
-#ifdef CONFIG_VIRT_CPU_ACCOUNTING
        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
        stpt    __LC_EXIT_TIMER
        lpsw    __LC_RETURN_MCCK_PSW    # back to caller
-0:
+0:      lm      %r0,%r15,SP_R0(%r15)    # load gprs 0-15
-#endif
-        lm      %r0,%r15,SP_R0(%r15)    # load gprs 0-15
        lpsw    __LC_RETURN_MCCK_PSW    # back to caller
        RESTORE_ALL __LC_RETURN_MCCK_PSW,0
@@ -976,13 +948,11 @@ cleanup_system_call:
        b       BASED(1f)
 0:      la      %r12,__LC_SAVE_AREA+32
 1:
-#ifdef CONFIG_VIRT_CPU_ACCOUNTING
        clc     __LC_RETURN_PSW+4(4),BASED(cleanup_system_call_insn+4)
        bh      BASED(0f)
        mvc     __LC_SYNC_ENTER_TIMER(8),__LC_ASYNC_ENTER_TIMER
 0:      clc     __LC_RETURN_PSW+4(4),BASED(cleanup_system_call_insn+8)
        bhe     BASED(cleanup_vtime)
-#endif
        clc     __LC_RETURN_PSW+4(4),BASED(cleanup_system_call_insn)
        bh      BASED(0f)
        mvc     __LC_SAVE_AREA(16),0(%r12)
@@ -993,7 +963,6 @@ cleanup_system_call:
        l       %r12,__LC_SAVE_AREA+48  # argh
        st      %r15,12(%r12)
        lh      %r7,0x8a
-#ifdef CONFIG_VIRT_CPU_ACCOUNTING
 cleanup_vtime:
        clc     __LC_RETURN_PSW+4(4),BASED(cleanup_system_call_insn+12)
        bhe     BASED(cleanup_stime)
@@ -1004,18 +973,15 @@ 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
-#endif
        mvc     __LC_RETURN_PSW+4(4),BASED(cleanup_table_system_call+4)
        la      %r12,__LC_RETURN_PSW
        br      %r14
 cleanup_system_call_insn:
        .long   sysc_saveall + 0x80000000
-#ifdef CONFIG_VIRT_CPU_ACCOUNTING
        .long   system_call + 0x80000000
        .long   sysc_vtime + 0x80000000
        .long   sysc_stime + 0x80000000
        .long   sysc_update + 0x80000000
-#endif
 cleanup_sysc_return:
        mvc     __LC_RETURN_PSW(4),0(%r12)
@@ -1026,11 +992,9 @@ cleanup_sysc_return:
 cleanup_sysc_leave:
        clc     4(4,%r12),BASED(cleanup_sysc_leave_insn)
        be      BASED(2f)
-#ifdef CONFIG_VIRT_CPU_ACCOUNTING
        mvc     __LC_EXIT_TIMER(8),__LC_ASYNC_ENTER_TIMER
        clc     4(4,%r12),BASED(cleanup_sysc_leave_insn+4)
        be      BASED(2f)
-#endif
        mvc     __LC_RETURN_PSW(8),SP_PSW(%r15)
        c       %r12,BASED(.Lmck_old_psw)
        bne     BASED(0f)
@@ -1043,9 +1007,7 @@ cleanup_sysc_leave:
        br      %r14
 cleanup_sysc_leave_insn:
        .long   sysc_done - 4 + 0x80000000
-#ifdef CONFIG_VIRT_CPU_ACCOUNTING
        .long   sysc_done - 8 + 0x80000000
-#endif
 cleanup_io_return:
        mvc     __LC_RETURN_PSW(4),0(%r12)
@@ -1056,11 +1018,9 @@ cleanup_io_return:
 cleanup_io_leave:
        clc     4(4,%r12),BASED(cleanup_io_leave_insn)
        be      BASED(2f)
-#ifdef CONFIG_VIRT_CPU_ACCOUNTING
        mvc     __LC_EXIT_TIMER(8),__LC_ASYNC_ENTER_TIMER
        clc     4(4,%r12),BASED(cleanup_io_leave_insn+4)
        be      BASED(2f)
-#endif
        mvc     __LC_RETURN_PSW(8),SP_PSW(%r15)
        c       %r12,BASED(.Lmck_old_psw)
        bne     BASED(0f)
@@ -1073,9 +1033,7 @@ cleanup_io_leave:
        br      %r14
 cleanup_io_leave_insn:
        .long   io_done - 4 + 0x80000000
-#ifdef CONFIG_VIRT_CPU_ACCOUNTING
        .long   io_done - 8 + 0x80000000
-#endif
 /*
 * Integer constants
diff --git a/arch/s390/kernel/entry64.S b/arch/s390/kernel/entry64.S
index ea90d9a676f8..16bb4fd1a403 100644
--- a/arch/s390/kernel/entry64.S
+++ b/arch/s390/kernel/entry64.S
@@ -96,20 +96,12 @@ _TIF_WORK_INT = (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | _TIF_NEED_RESCHED | \
 #define LOCKDEP_SYS_EXIT
 #endif
-        .macro  STORE_TIMER lc_offset
-#ifdef CONFIG_VIRT_CPU_ACCOUNTING
-        stpt    \lc_offset
-#endif
-        .endm
-#ifdef CONFIG_VIRT_CPU_ACCOUNTING
        .macro  UPDATE_VTIME lc_from,lc_to,lc_sum
        lg      %r10,\lc_from
        slg     %r10,\lc_to
        alg     %r10,\lc_sum
        stg     %r10,\lc_sum
        .endm
-#endif
 /*
 * Register usage in interrupt handlers:
@@ -186,7 +178,7 @@ _TIF_WORK_INT = (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | _TIF_NEED_RESCHED | \
        ni      \psworg+1,0xfd          # clear wait state bit
        .endif
        lmg     %r0,%r15,SP_R0(%r15)    # load gprs 0-15 of user
-        STORE_TIMER __LC_EXIT_TIMER
+        stpt    __LC_EXIT_TIMER
        lpswe   \psworg                 # back to caller
        .endm
@@ -233,20 +225,18 @@ __critical_start:
        .globl  system_call
 system_call:
-        STORE_TIMER __LC_SYNC_ENTER_TIMER
+        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
-#ifdef CONFIG_VIRT_CPU_ACCOUNTING
 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
-#endif
 sysc_do_svc:
        lg      %r9,__LC_THREAD_INFO    # load pointer to thread_info struct
        ltgr    %r7,%r7         # test for svc 0
@@ -469,20 +459,18 @@ pgm_check_handler:
 * we just ignore the PER event (FIXME: is there anything we have to do
 * for LPSW?).
 */
-        STORE_TIMER __LC_SYNC_ENTER_TIMER
+        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
-#ifdef CONFIG_VIRT_CPU_ACCOUNTING
        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
 pgm_no_vtime:
-#endif
        lg      %r9,__LC_THREAD_INFO    # load pointer to thread_info struct
        mvc     SP_ARGS(8,%r15),__LC_LAST_BREAK
        TRACE_IRQS_OFF
@@ -516,14 +504,12 @@ pgm_per:
 pgm_per_std:
        SAVE_ALL_SYNC __LC_PGM_OLD_PSW,__LC_SAVE_AREA
        CREATE_STACK_FRAME __LC_PGM_OLD_PSW,__LC_SAVE_AREA
-#ifdef CONFIG_VIRT_CPU_ACCOUNTING
        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
 pgm_no_vtime2:
-#endif
        lg      %r9,__LC_THREAD_INFO    # load pointer to thread_info struct
        TRACE_IRQS_OFF
        lg      %r1,__TI_task(%r9)
@@ -545,11 +531,9 @@ pgm_no_vtime2:
 pgm_svcper:
        SAVE_ALL_SYNC __LC_SVC_OLD_PSW,__LC_SAVE_AREA
        CREATE_STACK_FRAME __LC_SVC_OLD_PSW,__LC_SAVE_AREA
-#ifdef CONFIG_VIRT_CPU_ACCOUNTING
        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
-#endif
        llgh    %r7,__LC_SVC_INT_CODE   # get svc number from lowcore
        lg      %r9,__LC_THREAD_INFO    # load pointer to thread_info struct
        lg      %r1,__TI_task(%r9)
@@ -575,19 +559,17 @@ kernel_per:
 */
        .globl io_int_handler
 io_int_handler:
-        STORE_TIMER __LC_ASYNC_ENTER_TIMER
+        stpt    __LC_ASYNC_ENTER_TIMER
        stck    __LC_INT_CLOCK
        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
-#ifdef CONFIG_VIRT_CPU_ACCOUNTING
        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
 io_no_vtime:
-#endif
        lg      %r9,__LC_THREAD_INFO    # load pointer to thread_info struct
        TRACE_IRQS_OFF
        la      %r2,SP_PTREGS(%r15)     # address of register-save area
@@ -739,19 +721,17 @@ io_notify_resume:
 */
        .globl  ext_int_handler
 ext_int_handler:
-        STORE_TIMER __LC_ASYNC_ENTER_TIMER
+        stpt    __LC_ASYNC_ENTER_TIMER
        stck    __LC_INT_CLOCK
        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
-#ifdef CONFIG_VIRT_CPU_ACCOUNTING
        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
 ext_no_vtime:
-#endif
        lg      %r9,__LC_THREAD_INFO    # load pointer to thread_info struct
        TRACE_IRQS_OFF
        la      %r2,SP_PTREGS(%r15)     # address of register-save area
@@ -773,7 +753,6 @@ mcck_int_handler:
        la      %r12,__LC_MCK_OLD_PSW
        tm      __LC_MCCK_CODE,0x80     # system damage?
        jo      mcck_int_main           # yes -> rest of mcck code invalid
-#ifdef CONFIG_VIRT_CPU_ACCOUNTING
        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)
@@ -791,9 +770,7 @@ mcck_int_handler:
        la      %r14,__LC_LAST_UPDATE_TIMER
 0:      spt     0(%r14)
        mvc     __LC_ASYNC_ENTER_TIMER(8),0(%r14)
-1:
+1:      tm      __LC_MCCK_CODE+2,0x09   # mwp + ia of old psw valid?
-#endif
-        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
        jnz     mcck_int_main           # from user -> load kernel stack
@@ -809,7 +786,6 @@ mcck_int_main:
        jz      0f
        lg      %r15,__LC_PANIC_STACK   # load panic stack
 0:      CREATE_STACK_FRAME __LC_MCK_OLD_PSW,__LC_SAVE_AREA+64
-#ifdef CONFIG_VIRT_CPU_ACCOUNTING
        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 ?
@@ -818,7 +794,6 @@ mcck_int_main:
        UPDATE_VTIME __LC_LAST_UPDATE_TIMER,__LC_EXIT_TIMER,__LC_SYSTEM_TIMER
        mvc     __LC_LAST_UPDATE_TIMER(8),__LC_ASYNC_ENTER_TIMER
 mcck_no_vtime:
-#endif
        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
@@ -839,14 +814,11 @@ 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
-#ifdef CONFIG_VIRT_CPU_ACCOUNTING
        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:
+0:      lpswe   __LC_RETURN_MCCK_PSW    # back to caller
-#endif
-        lpswe   __LC_RETURN_MCCK_PSW    # back to caller
 /*
 * Restart interruption handler, kick starter for additional CPUs
@@ -964,13 +936,11 @@ cleanup_system_call:
        j       1f
 0:      la      %r12,__LC_SAVE_AREA+64
 1:
-#ifdef CONFIG_VIRT_CPU_ACCOUNTING
        clc     __LC_RETURN_PSW+8(8),BASED(cleanup_system_call_insn+8)
        jh      0f
        mvc     __LC_SYNC_ENTER_TIMER(8),__LC_ASYNC_ENTER_TIMER
 0:      clc     __LC_RETURN_PSW+8(8),BASED(cleanup_system_call_insn+16)
        jhe     cleanup_vtime
-#endif
        clc     __LC_RETURN_PSW+8(8),BASED(cleanup_system_call_insn)
        jh      0f
        mvc     __LC_SAVE_AREA(32),0(%r12)
@@ -981,7 +951,6 @@ cleanup_system_call:
        lg      %r12,__LC_SAVE_AREA+96  # argh
        stg     %r15,24(%r12)
        llgh    %r7,__LC_SVC_INT_CODE
-#ifdef CONFIG_VIRT_CPU_ACCOUNTING
 cleanup_vtime:
        clc     __LC_RETURN_PSW+8(8),BASED(cleanup_system_call_insn+24)
        jhe     cleanup_stime
@@ -992,18 +961,15 @@ 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
-#endif
        mvc     __LC_RETURN_PSW+8(8),BASED(cleanup_table_system_call+8)
        la      %r12,__LC_RETURN_PSW
        br      %r14
 cleanup_system_call_insn:
        .quad   sysc_saveall
-#ifdef CONFIG_VIRT_CPU_ACCOUNTING
        .quad   system_call
        .quad   sysc_vtime
        .quad   sysc_stime
        .quad   sysc_update
-#endif
 cleanup_sysc_return:
        mvc     __LC_RETURN_PSW(8),0(%r12)
@@ -1014,11 +980,9 @@ cleanup_sysc_return:
 cleanup_sysc_leave:
        clc     8(8,%r12),BASED(cleanup_sysc_leave_insn)
        je      2f
-#ifdef CONFIG_VIRT_CPU_ACCOUNTING
        mvc     __LC_EXIT_TIMER(8),__LC_ASYNC_ENTER_TIMER
        clc     8(8,%r12),BASED(cleanup_sysc_leave_insn+8)
        je      2f
-#endif
        mvc     __LC_RETURN_PSW(16),SP_PSW(%r15)
        cghi    %r12,__LC_MCK_OLD_PSW
        jne     0f
@@ -1031,9 +995,7 @@ cleanup_sysc_leave:
        br      %r14
 cleanup_sysc_leave_insn:
        .quad   sysc_done - 4
-#ifdef CONFIG_VIRT_CPU_ACCOUNTING
        .quad   sysc_done - 8
-#endif
 cleanup_io_return:
        mvc     __LC_RETURN_PSW(8),0(%r12)
@@ -1044,11 +1006,9 @@ cleanup_io_return:
 cleanup_io_leave:
        clc     8(8,%r12),BASED(cleanup_io_leave_insn)
        je      2f
-#ifdef CONFIG_VIRT_CPU_ACCOUNTING
        mvc     __LC_EXIT_TIMER(8),__LC_ASYNC_ENTER_TIMER
        clc     8(8,%r12),BASED(cleanup_io_leave_insn+8)
        je      2f
-#endif
        mvc     __LC_RETURN_PSW(16),SP_PSW(%r15)
        cghi    %r12,__LC_MCK_OLD_PSW
        jne     0f
@@ -1061,9 +1021,7 @@ cleanup_io_leave:
        br      %r14
 cleanup_io_leave_insn:
        .quad   io_done - 4
-#ifdef CONFIG_VIRT_CPU_ACCOUNTING
        .quad   io_done - 8
-#endif
 /*
 * Integer constants
diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c
index 176a43e5b8b4..bf170c698f0c 100644
--- a/arch/s390/kernel/smp.c
+++ b/arch/s390/kernel/smp.c
@@ -441,10 +441,8 @@ int __cpuinit start_secondary(void *cpuvoid)
        preempt_disable();
        /* Enable TOD clock interrupts on the secondary cpu. */
        init_cpu_timer();
-#ifdef CONFIG_VIRT_TIMER
        /* Enable cpu timer interrupts on the secondary cpu. */
        init_cpu_vtimer();
-#endif
        /* Enable pfault pseudo page faults on this cpu. */
        pfault_init();
diff --git a/arch/s390/kernel/time.c b/arch/s390/kernel/time.c
index 496528561248..95620296e1ad 100644
--- a/arch/s390/kernel/time.c
+++ b/arch/s390/kernel/time.c
@@ -286,10 +286,8 @@ void __init time_init(void)
        /* Enable TOD clock interrupts on the boot cpu. */
        init_cpu_timer();
+        /* Enable cpu timer interrupts on the boot cpu. */
-#ifdef CONFIG_VIRT_TIMER
        vtime_init();
-#endif
 }
 /*
diff --git a/arch/s390/kernel/vtime.c b/arch/s390/kernel/vtime.c
index 0fa5dc5d68e1..75a6e62ea973 100644
--- a/arch/s390/kernel/vtime.c
+++ b/arch/s390/kernel/vtime.c
@@ -27,7 +27,6 @@
 static ext_int_info_t ext_int_info_timer;
 static DEFINE_PER_CPU(struct vtimer_queue, virt_cpu_timer);
-#ifdef CONFIG_VIRT_CPU_ACCOUNTING
 /*
 * Update process times based on virtual cpu times stored by entry.S
 * to the lowcore fields user_timer, system_timer & steal_clock.
@@ -125,16 +124,6 @@ static inline void set_vtimer(__u64 expires)
        /* store expire time for this CPU timer */
        __get_cpu_var(virt_cpu_timer).to_expire = expires;
 }
-#else
-static inline void set_vtimer(__u64 expires)
-{
-        S390_lowcore.last_update_timer = expires;
-        asm volatile ("SPT %0" : : "m" (S390_lowcore.last_update_timer));
-        /* store expire time for this CPU timer */
-        __get_cpu_var(virt_cpu_timer).to_expire = expires;
-}
-#endif
 void vtime_start_cpu_timer(void)
 {