diff options
| author | Michael Holzheu <holzheu@linux.vnet.ibm.com> | 2011-08-03 14:44:19 (GMT) |
|---|---|---|
| committer | Heiko Carstens <heiko.carstens@de.ibm.com> | 2011-08-03 14:44:19 (GMT) |
| commit | 7dd6b3343fdc190712d1620ee8848d25c4c77c33 (patch) | |
| tree | e4c3258880f88096f9ecf65fa2cca20e62b5813d /arch/s390/kernel/setup.c | |
| parent | 944291de33b26a8b403f13f5eb0cc51fb982aa1e (diff) | |
| download | linux-fsl-qoriq-7dd6b3343fdc190712d1620ee8848d25c4c77c33.tar.xz | |
[S390] Add PSW restart shutdown trigger
With this patch a new S390 shutdown trigger "restart" is added. If under
z/VM "systerm restart" is entered or under the HMC the "PSW restart" button
is pressed, the PSW located at 0 (31 bit) or 0x1a0 (64 bit) bit is loaded.
Now we execute do_restart() that processes the restart action that is
defined under /sys/firmware/shutdown_actions/on_restart. Currently the
following actions are possible: reipl (default), stop, vmcmd, dump, and
dump_reipl.
Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Diffstat (limited to 'arch/s390/kernel/setup.c')
| -rw-r--r-- | arch/s390/kernel/setup.c | 24 |
1 files changed, 23 insertions, 1 deletions
diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c index 0c35dee..18640ff 100644 --- a/arch/s390/kernel/setup.c +++ b/arch/s390/kernel/setup.c @@ -346,7 +346,7 @@ setup_lowcore(void) lc = __alloc_bootmem_low(LC_PAGES * PAGE_SIZE, LC_PAGES * PAGE_SIZE, 0); lc->restart_psw.mask = PSW_BASE_BITS | PSW_DEFAULT_KEY; lc->restart_psw.addr = - PSW_ADDR_AMODE | (unsigned long) restart_int_handler; + PSW_ADDR_AMODE | (unsigned long) psw_restart_int_handler; if (user_mode != HOME_SPACE_MODE) lc->restart_psw.mask |= PSW_ASC_HOME; lc->external_new_psw.mask = psw_kernel_bits; @@ -529,6 +529,27 @@ static void __init setup_memory_end(void) memory_end = memory_size; } +void *restart_stack __attribute__((__section__(".data"))); + +/* + * Setup new PSW and allocate stack for PSW restart interrupt + */ +static void __init setup_restart_psw(void) +{ + psw_t psw; + + restart_stack = __alloc_bootmem(ASYNC_SIZE, ASYNC_SIZE, 0); + restart_stack += ASYNC_SIZE; + + /* + * Setup restart PSW for absolute zero lowcore. This is necesary + * if PSW restart is done on an offline CPU that has lowcore zero + */ + psw.mask = PSW_BASE_BITS | PSW_DEFAULT_KEY; + psw.addr = PSW_ADDR_AMODE | (unsigned long) psw_restart_int_handler; + copy_to_absolute_zero(&S390_lowcore.restart_psw, &psw, sizeof(psw)); +} + static void __init setup_memory(void) { @@ -792,6 +813,7 @@ setup_arch(char **cmdline_p) setup_addressing_mode(); setup_memory(); setup_resources(); + setup_restart_psw(); setup_lowcore(); cpu_init(); |