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| author | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2009-04-14 13:36:29 (GMT) |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2009-04-14 13:37:27 (GMT) |
| commit | ab96e798cbd562a53edd802272e49a5100b29efb (patch) | |
| tree | 4b3558bc97f5c2fc5c63789431deef79534e3bd3 /arch/s390/kernel/head.S | |
| parent | b6112ccbff5ec580d46b584ecc3c3a773b830da2 (diff) | |
| download | linux-ab96e798cbd562a53edd802272e49a5100b29efb.tar.xz | |
[S390] boot cputime accounting
Start the cpu time accounting very early to catch the cpu time spent
for the initial kernel setup. To make the output of /proc/uptime
match the sum of all cpu accounting values of the boot cpu reset
xtime and wall_to_monotonic to sane values based on the TOD clock.
The values set by timekeeping_init are off by up to a second.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/kernel/head.S')
| -rw-r--r-- | arch/s390/kernel/head.S | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/arch/s390/kernel/head.S b/arch/s390/kernel/head.S index 16f8975..bba1449 100644 --- a/arch/s390/kernel/head.S +++ b/arch/s390/kernel/head.S @@ -473,7 +473,10 @@ startup:basr %r13,0 # get base xc 0x300(256),0x300 l %r1,5f-.LPG0(%r13) stck 0(%r1) - + spt 6f-.LPG0(%r13) + mvc __LC_LAST_UPDATE_CLOCK(8),0(%r1) + mvc __LC_LAST_UPDATE_TIMER(8),6f-.LPG0(%r13) + mvc __LC_EXIT_TIMER(8),5f-.LPG0(%r13) #ifndef CONFIG_MARCH_G5 # check processor version against MARCH_{G5,Z900,Z990,Z9_109,Z10} stidp __LC_CPUID # store cpuid @@ -500,8 +503,11 @@ startup:basr %r13,0 # get base l %r13,4f-.LPG0(%r13) b 0(%r13) + .align 4 4: .long startup_continue 5: .long sched_clock_base_cc + .align 8 +6: .long 0x7fffffff,0xffffffff # # params at 10400 (setup.h) |