lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

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

Browse Source 
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
Download Patch File Download Diff File Expand all files Collapse all files

5
arch/powerpc/kernel/prom.c
View File

@@ -1060,6 +1060,11 @@ static void __init phyp_dump_reserve_mem(void)
return; 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) { if (phyp_dump_info->phyp_dump_is_active) {
/* Reserve *everything* above RMR.Area freed by userland tools*/ /* Reserve *everything* above RMR.Area freed by userland tools*/
base = PHYP_DUMP_RMR_END; base = PHYP_DUMP_RMR_END;

18
arch/powerpc/platforms/pseries/phyp_dump.c
View File

@@ -460,3 +460,21 @@ int __init early_init_dt_scan_phyp_dump(unsigned long node,
*((unsigned long *)&sizes[4]); *((unsigned long *)&sizes[4]);
return 1; 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);

1
include/asm-powerpc/phyp_dump.h
View File

@@ -25,6 +25,7 @@ struct phyp_dump {
unsigned long init_reserve_start; unsigned long init_reserve_start;
unsigned long init_reserve_size; unsigned long init_reserve_size;
/* Check status during boot if dump supported, active & present*/ /* Check status during boot if dump supported, active & present*/
unsigned long phyp_dump_at_boot;
unsigned long phyp_dump_configured; unsigned long phyp_dump_configured;
unsigned long phyp_dump_is_active; unsigned long phyp_dump_is_active;
/* store cpu & hpte size */ /* store cpu & hpte size */