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| author | Manish Ahuja <ahuja@austin.ibm.com> | 2008-03-22 11:38:59 +1100 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2008-03-26 08:44:07 +1100 |
| commit | 654f596da4a83a8d2734fba26c2a1257533e6d75 (patch) | |
| tree | a937646dfd6e225e6b3f25d6adbde921200f21d9 | |
| parent | 242f271c056f49b64b94c06b38fe9e8d3bf703bc (diff) | |
| download | linux-3.10-654f596da4a83a8d2734fba26c2a1257533e6d75.tar.gz linux-3.10-654f596da4a83a8d2734fba26c2a1257533e6d75.tar.bz2 linux-3.10-654f596da4a83a8d2734fba26c2a1257533e6d75.zip | |
[POWERPC] pseries: phyp dump: Disable phyp-dump through boot-var
This adds a kernel command line option "phyp_dump", which takes a 0/1
value for disabling/ enabling phyp_dump at boot time. Kdump can use
this on cmdline (phyp_dump=0) to disable phyp-dump during boot when
enabling itself. This will ensure only one dumping mechanism is active
at any given time.
Signed-off-by: Manish Ahuja <mahuja@us.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
| -rw-r--r-- | arch/powerpc/kernel/prom.c | 5 | ||||
| -rw-r--r-- | arch/powerpc/platforms/pseries/phyp_dump.c | 18 | ||||
| -rw-r--r-- | include/asm-powerpc/phyp_dump.h | 1 |
3 files changed, 24 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c index e6c022ef12e..9330920265f 100644 --- a/arch/powerpc/kernel/prom.c +++ b/arch/powerpc/kernel/prom.c @@ -1060,6 +1060,11 @@ static void __init phyp_dump_reserve_mem(void) return; } + if (!phyp_dump_info->phyp_dump_at_boot) { + printk(KERN_INFO "Phyp-dump disabled at boot time\n"); + return; + } + if (phyp_dump_info->phyp_dump_is_active) { /* Reserve *everything* above RMR.Area freed by userland tools*/ base = PHYP_DUMP_RMR_END; diff --git a/arch/powerpc/platforms/pseries/phyp_dump.c b/arch/powerpc/platforms/pseries/phyp_dump.c index 034fe1b54dd..f80f8606c6b 100644 --- a/arch/powerpc/platforms/pseries/phyp_dump.c +++ b/arch/powerpc/platforms/pseries/phyp_dump.c @@ -460,3 +460,21 @@ int __init early_init_dt_scan_phyp_dump(unsigned long node, *((unsigned long *)&sizes[4]); return 1; } + +/* Look for phyp_dump= cmdline option */ +static int __init early_phyp_dump_enabled(char *p) +{ + phyp_dump_info->phyp_dump_at_boot = 1; + + if (!p) + return 0; + + if (strncmp(p, "1", 1) == 0) + phyp_dump_info->phyp_dump_at_boot = 1; + else if (strncmp(p, "0", 1) == 0) + phyp_dump_info->phyp_dump_at_boot = 0; + + return 0; +} +early_param("phyp_dump", early_phyp_dump_enabled); + diff --git a/include/asm-powerpc/phyp_dump.h b/include/asm-powerpc/phyp_dump.h index b454de45b2c..209a98913d9 100644 --- a/include/asm-powerpc/phyp_dump.h +++ b/include/asm-powerpc/phyp_dump.h @@ -25,6 +25,7 @@ struct phyp_dump { unsigned long init_reserve_start; unsigned long init_reserve_size; /* Check status during boot if dump supported, active & present*/ + unsigned long phyp_dump_at_boot; unsigned long phyp_dump_configured; unsigned long phyp_dump_is_active; /* store cpu & hpte size */ |