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x86: add "debugpat" boot option

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enable debug messages by a boot option "debugpat".

Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Venki Pallipadi 2008-05-05 19:09:10 -07:00 committed by Ingo Molnar
parent 988f7b5789
commit 77b52b4c5c
1 changed files with 20 additions and 7 deletions
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27
arch/x86/mm/pat.c
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@ -42,6 +42,19 @@ static int nopat(char *str)
early_param("nopat", nopat); early_param("nopat", nopat);
#endif #endif
static int debug_enable;
static int __init pat_debug_setup(char *str)
{
debug_enable = 1;
return 0;
}
__setup("debugpat", pat_debug_setup);
#define dprintk(fmt, arg...) \
do { if (debug_enable) printk(KERN_INFO fmt, ##arg); } while (0)
static u64 __read_mostly boot_pat_state; static u64 __read_mostly boot_pat_state;
enum { enum {
@ -279,7 +292,7 @@ int reserve_memtype(u64 start, u64 end, unsigned long req_type,
struct memtype *saved_ptr; struct memtype *saved_ptr;
if (parse->start >= end) { if (parse->start >= end) {
pr_debug("New Entry\n"); dprintk("New Entry\n");
list_add(&new_entry->nd, parse->nd.prev); list_add(&new_entry->nd, parse->nd.prev);
new_entry = NULL; new_entry = NULL;
break; break;
@ -329,7 +342,7 @@ int reserve_memtype(u64 start, u64 end, unsigned long req_type,
break; break;
} }
pr_debug("Overlap at 0x%Lx-0x%Lx\n", dprintk("Overlap at 0x%Lx-0x%Lx\n",
saved_ptr->start, saved_ptr->end); saved_ptr->start, saved_ptr->end);
/* No conflict. Go ahead and add this new entry */ /* No conflict. Go ahead and add this new entry */
list_add(&new_entry->nd, saved_ptr->nd.prev); list_add(&new_entry->nd, saved_ptr->nd.prev);
@ -381,7 +394,7 @@ int reserve_memtype(u64 start, u64 end, unsigned long req_type,
break; break;
} }
pr_debug(KERN_INFO "Overlap at 0x%Lx-0x%Lx\n", dprintk("Overlap at 0x%Lx-0x%Lx\n",
saved_ptr->start, saved_ptr->end); saved_ptr->start, saved_ptr->end);
/* No conflict. Go ahead and add this new entry */ /* No conflict. Go ahead and add this new entry */
list_add(&new_entry->nd, &saved_ptr->nd); list_add(&new_entry->nd, &saved_ptr->nd);
@ -403,16 +416,16 @@ int reserve_memtype(u64 start, u64 end, unsigned long req_type,
if (new_entry) { if (new_entry) {
/* No conflict. Not yet added to the list. Add to the tail */ /* No conflict. Not yet added to the list. Add to the tail */
list_add_tail(&new_entry->nd, &memtype_list); list_add_tail(&new_entry->nd, &memtype_list);
pr_debug("New Entry\n"); dprintk("New Entry\n");
} }
if (ret_type) { if (ret_type) {
pr_debug( dprintk(
"reserve_memtype added 0x%Lx-0x%Lx, track %s, req %s, ret %s\n", "reserve_memtype added 0x%Lx-0x%Lx, track %s, req %s, ret %s\n",
start, end, cattr_name(actual_type), start, end, cattr_name(actual_type),
cattr_name(req_type), cattr_name(*ret_type)); cattr_name(req_type), cattr_name(*ret_type));
} else { } else {
pr_debug( dprintk(
"reserve_memtype added 0x%Lx-0x%Lx, track %s, req %s\n", "reserve_memtype added 0x%Lx-0x%Lx, track %s, req %s\n",
start, end, cattr_name(actual_type), start, end, cattr_name(actual_type),
cattr_name(req_type)); cattr_name(req_type));
@ -453,7 +466,7 @@ int free_memtype(u64 start, u64 end)
current->comm, current->pid, start, end); current->comm, current->pid, start, end);
} }
pr_debug("free_memtype request 0x%Lx-0x%Lx\n", start, end); dprintk("free_memtype request 0x%Lx-0x%Lx\n", start, end);
return err; return err;
} }