From 4050ba0a89a3a97b29d4f281b7570495cf5596d9 Mon Sep 17 00:00:00 2001
From: Raghuram Subramani <raghus2247@gmail.com>
Date: Sun, 2 Jun 2024 09:43:20 +0530
Subject: update

---
 dist/disable-pat-check.patch | 51 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 51 insertions(+)
 create mode 100644 dist/disable-pat-check.patch

(limited to 'dist/disable-pat-check.patch')

diff --git a/dist/disable-pat-check.patch b/dist/disable-pat-check.patch
new file mode 100644
index 0000000..f3d3877
--- /dev/null
+++ b/dist/disable-pat-check.patch
@@ -0,0 +1,51 @@
+--- a/arch/x86/mm/pat/memtype_interval.c
++++ b/arch/x86/mm/pat/memtype_interval.c
+@@ -33,6 +33,16 @@
+  * memtype_lock protects the rbtree.
+  */
+ 
++int skip_pat_enable = 0;
++
++static int __init skip_pat_check(char *str)
++{
++	skip_pat_enable = 1;
++	pr_info("Disabled PAT check type (experimental)\n");
++	return 0;
++}
++early_param("skippatcheck", skip_pat_check);
++
+ static inline u64 interval_start(struct memtype *entry)
+ {
+ 	return entry->start;
+@@ -86,19 +96,22 @@
+ 	if (entry_match == NULL)
+ 		goto success;
+ 
+-	if (entry_match->type != found_type && newtype == NULL)
+-		goto failure;
+-
+-	dprintk("Overlap at 0x%Lx-0x%Lx\n", entry_match->start, entry_match->end);
+-	found_type = entry_match->type;
+-
+-	entry_match = interval_iter_next(entry_match, start, end-1);
+-	while (entry_match) {
+-		if (entry_match->type != found_type)
++	if (!skip_pat_enable) {
++		if (entry_match->type != found_type && newtype == NULL)
+ 			goto failure;
+ 
++		dprintk("Overlap at 0x%Lx-0x%Lx\n", entry_match->start, entry_match->end);
++		found_type = entry_match->type;
++
+ 		entry_match = interval_iter_next(entry_match, start, end-1);
++		while (entry_match) {
++			if (entry_match->type != found_type)
++				goto failure;
++
++			entry_match = interval_iter_next(entry_match, start, end-1);
++		}
+ 	}
++
+ success:
+ 	if (newtype)
+ 		*newtype = found_type;
-- 
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