1 files changed, 27 insertions, 0 deletions
diff --git a/arch/x86/include/asm/pat.h b/arch/x86/include/asm/pat.h
new file mode 100644
index 000000000..92015c65f
--- /dev/null
+++ b/arch/x86/include/asm/pat.h
@@ -0,0 +1,27 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _ASM_X86_PAT_H
+#define _ASM_X86_PAT_H
+
+#include <linux/types.h>
+#include <asm/pgtable_types.h>
+
+bool pat_enabled(void);
+void pat_disable(const char *reason);
+extern void pat_init(void);
+extern void init_cache_modes(void);
+
+extern int reserve_memtype(u64 start, u64 end,
+		enum page_cache_mode req_pcm, enum page_cache_mode *ret_pcm);
+extern int free_memtype(u64 start, u64 end);
+
+extern int kernel_map_sync_memtype(u64 base, unsigned long size,
+		enum page_cache_mode pcm);
+
+int io_reserve_memtype(resource_size_t start, resource_size_t end,
+			enum page_cache_mode *pcm);
+
+void io_free_memtype(resource_size_t start, resource_size_t end);
+
+bool pat_pfn_immune_to_uc_mtrr(unsigned long pfn);
+
+#endif /* _ASM_X86_PAT_H */