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[POWERPC] pseries: phyp dump: Disable phyp-dump through boot-var

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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>
This commit is contained in:
Manish Ahuja
2008-03-22 11:38:59 +11:00
committed by Paul Mackerras
parent 242f271c05
commit 654f596da4
3 changed files with 24 additions and 0 deletions
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5
arch/powerpc/kernel/prom.c
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@ -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;