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Commit 77b52b4c authored by Venki Pallipadi's avatar Venki Pallipadi Committed by Ingo Molnar
Browse files

x86: add "debugpat" boot option 



enable debug messages by a boot option "debugpat".

Signed-off-by: default avatarVenkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
parent 988f7b57

arch/x86/mm/pat.c

+20 −7
Original line number Diff line number Diff line
@@ -42,6 +42,19 @@ static int nopat(char *str) 
early_param("nopat", nopat);

#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;



enum {
@@ -279,7 +292,7 @@ int reserve_memtype(u64 start, u64 end, unsigned long req_type, 
		struct memtype *saved_ptr;



		if (parse->start >= end) {

			pr_debug("New Entry\n");

			dprintk("New Entry\n");

			list_add(&new_entry->nd, parse->nd.prev);

			new_entry = NULL;

			break;
@@ -329,7 +342,7 @@ int reserve_memtype(u64 start, u64 end, unsigned long req_type, 
				break;

			}



			pr_debug("Overlap at 0x%Lx-0x%Lx\n",

			dprintk("Overlap at 0x%Lx-0x%Lx\n",

			       saved_ptr->start, saved_ptr->end);

			/* No conflict. Go ahead and add this new entry */

			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;

			}



			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);

			/* No conflict. Go ahead and add this new entry */

			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) {

		/* No conflict. Not yet added to the list. Add to the tail */

		list_add_tail(&new_entry->nd, &memtype_list);

		pr_debug("New Entry\n");

		dprintk("New Entry\n");

	}



	if (ret_type) {

		pr_debug(

		dprintk(

	"reserve_memtype added 0x%Lx-0x%Lx, track %s, req %s, ret %s\n",

			start, end, cattr_name(actual_type),

			cattr_name(req_type), cattr_name(*ret_type));

	} else {

		pr_debug(

		dprintk(

	"reserve_memtype added 0x%Lx-0x%Lx, track %s, req %s\n",

			start, end, cattr_name(actual_type),

			cattr_name(req_type));
@@ -453,7 +466,7 @@ int free_memtype(u64 start, u64 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;

}