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[POWERPC] Fix RTAS os-term usage on kernel panic 

The rtas_os_term() routine was being called at the wrong time.
The actual rtas call "os-term" will not ever return, and so
calling it from the panic notifier is too early.  Instead,
call it from the machine_reset() call.

This splits the rtas_os_term() routine into two: one part to capture
the kernel panic message, invoked during the panic notifier, and
another part that is invoked during machine_reset().

Prior to this patch, the os-term call was never being made,
because panic_timeout was always non-zero.  Calling os-term
helps keep the hypervisor happy!  We have to keep the hypervisor
happy to avoid service, dump and error reporting problems.

Signed-off-by: Linas Vepstas <linas@austin.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
hifive-unleashed-5.1
Linas Vepstas 2007-11-20 12:28:15 +11:00 committed by Paul Mackerras
parent fbe481756d
commit a2b51812a4
3 changed files with 10 additions and 8 deletions
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12
arch/powerpc/kernel/rtas.c
View File

@ -638,18 +638,18 @@ void rtas_halt(void)
/* Must be in the RMO region, so we place it here */
static char rtas_os_term_buf[2048];
void rtas_os_term(char *str)
void rtas_panic_msg(char *str)
{
snprintf(rtas_os_term_buf, 2048, "OS panic: %s", str);
}
void rtas_os_term(void)
{
int status;
if (panic_timeout)
return;
if (RTAS_UNKNOWN_SERVICE == rtas_token("ibm,os-term"))
return;
snprintf(rtas_os_term_buf, 2048, "OS panic: %s", str);
do {
status = rtas_call(rtas_token("ibm,os-term"), 1, 1, NULL,
__pa(rtas_os_term_buf));

3
arch/powerpc/platforms/pseries/setup.c
View File

@ -507,7 +507,8 @@ define_machine(pseries) {
.restart = rtas_restart,
.power_off = pSeries_power_off,
.halt = rtas_halt,
.panic = rtas_os_term,
.panic = rtas_panic_msg,
.machine_shutdown = rtas_os_term,
.get_boot_time = rtas_get_boot_time,
.get_rtc_time = rtas_get_rtc_time,
.set_rtc_time = rtas_set_rtc_time,

3
include/asm-powerpc/rtas.h
View File

@ -164,7 +164,8 @@ extern int rtas_call(int token, int, int, int *, ...);
extern void rtas_restart(char *cmd);
extern void rtas_power_off(void);
extern void rtas_halt(void);
extern void rtas_os_term(char *str);
extern void rtas_panic_msg(char *str);
extern void rtas_os_term(void);
extern int rtas_get_sensor(int sensor, int index, int *state);
extern int rtas_get_power_level(int powerdomain, int *level);
extern int rtas_set_power_level(int powerdomain, int level, int *setlevel);