diff options
| author | Sven Schnelle <svens@stackframe.org> | 2019-09-08 11:33:03 +0200 |
|---|---|---|
| committer | Helge Deller <deller@gmx.de> | 2019-09-08 15:19:58 +0200 |
| commit | 507efd63d98c4437d62bbfa932b322e72723e1fc (patch) | |
| tree | 6c9d7283f37f68b9153e0025b1703fa01b69d820 /arch/parisc | |
| parent | kprobes/parisc: remove arch_kprobe_on_func_entry() (diff) | |
| download | linux-507efd63d98c4437d62bbfa932b322e72723e1fc.tar.xz linux-507efd63d98c4437d62bbfa932b322e72723e1fc.zip | |
parisc: add __pdc_cpu_rendezvous()
When stopping SMP cpus send them into rendezvous, so we can
start them again later (when kexec'ing a new kernel).
Signed-off-by: Sven Schnelle <svens@stackframe.org>
Signed-off-by: Helge Deller <deller@gmx.de>
Diffstat (limited to 'arch/parisc')
| -rw-r--r-- | arch/parisc/include/asm/pdc.h | 1 | ||||
| -rw-r--r-- | arch/parisc/kernel/firmware.c | 13 | ||||
| -rw-r--r-- | arch/parisc/kernel/smp.c | 1 |
3 files changed, 15 insertions, 0 deletions
diff --git a/arch/parisc/include/asm/pdc.h b/arch/parisc/include/asm/pdc.h index 19bb2e46cd36..b388d8176588 100644 --- a/arch/parisc/include/asm/pdc.h +++ b/arch/parisc/include/asm/pdc.h @@ -91,6 +91,7 @@ int pdc_sti_call(unsigned long func, unsigned long flags, unsigned long inptr, unsigned long outputr, unsigned long glob_cfg); +int __pdc_cpu_rendezvous(void); static inline char * os_id_to_string(u16 os_id) { switch(os_id) { case OS_ID_NONE: return "No OS"; diff --git a/arch/parisc/kernel/firmware.c b/arch/parisc/kernel/firmware.c index 58cc08e7fd12..1d976f2ebff0 100644 --- a/arch/parisc/kernel/firmware.c +++ b/arch/parisc/kernel/firmware.c @@ -312,6 +312,19 @@ int pdc_chassis_disp(unsigned long disp) } /** + * pdc_cpu_rendenzvous - Stop currently executing CPU + * @retval: -1 on error, 0 on success + */ +int __pdc_cpu_rendezvous(void) +{ + if (is_pdc_pat()) + return mem_pdc_call(PDC_PAT_CPU, PDC_PAT_CPU_RENDEZVOUS); + else + return mem_pdc_call(PDC_PROC, 1, 0); +} + + +/** * pdc_chassis_warn - Fetches chassis warnings * @retval: -1 on error, 0 on success */ diff --git a/arch/parisc/kernel/smp.c b/arch/parisc/kernel/smp.c index cbd074ba22da..e202c37e56af 100644 --- a/arch/parisc/kernel/smp.c +++ b/arch/parisc/kernel/smp.c @@ -109,6 +109,7 @@ halt_processor(void) /* REVISIT : does PM *know* this CPU isn't available? */ set_cpu_online(smp_processor_id(), false); local_irq_disable(); + __pdc_cpu_rendezvous(); for (;;) ; } |