1 files changed, 28 insertions, 16 deletions

diff --git a/arch/x86/include/asm/extable.h b/arch/x86/include/asm/extable.h
index 1f0cbc52937c..93f400eb728f 100644
--- a/arch/x86/include/asm/extable.h
+++ b/arch/x86/include/asm/extable.h
@@ -1,12 +1,18 @@
 /* SPDX-License-Identifier: GPL-2.0 */
 #ifndef _ASM_X86_EXTABLE_H
 #define _ASM_X86_EXTABLE_H
+
+#include <asm/extable_fixup_types.h>
+
 /*
- * The exception table consists of triples of addresses relative to the
- * exception table entry itself. The first address is of an instruction
- * that is allowed to fault, the second is the target at which the program
- * should continue. The third is a handler function to deal with the fault
- * caused by the instruction in the first field.
+ * The exception table consists of two addresses relative to the
+ * exception table entry itself and a type selector field.
+ *
+ * The first address is of an instruction that is allowed to fault, the
+ * second is the target at which the program should continue.
+ *
+ * The type entry is used by fixup_exception() to select the handler to
+ * deal with the fault caused by the instruction in the first field.
  *
  * All the routines below use bits of fixup code that are out of line
  * with the main instruction path.  This means when everything is well,
@@ -15,7 +21,7 @@
  */
 
 struct exception_table_entry {
-	int insn, fixup, handler;
+	int insn, fixup, type;
 };
 struct pt_regs;
 
@@ -25,21 +31,27 @@ struct pt_regs;
 	do {							\
 		(a)->fixup = (b)->fixup + (delta);		\
 		(b)->fixup = (tmp).fixup - (delta);		\
-		(a)->handler = (b)->handler + (delta);		\
-		(b)->handler = (tmp).handler - (delta);		\
+		(a)->type = (b)->type;				\
+		(b)->type = (tmp).type;				\
 	} while (0)
 
-enum handler_type {
-	EX_HANDLER_NONE,
-	EX_HANDLER_FAULT,
-	EX_HANDLER_UACCESS,
-	EX_HANDLER_OTHER
-};
-
 extern int fixup_exception(struct pt_regs *regs, int trapnr,
 			   unsigned long error_code, unsigned long fault_addr);
 extern int fixup_bug(struct pt_regs *regs, int trapnr);
-extern enum handler_type ex_get_fault_handler_type(unsigned long ip);
+extern int ex_get_fixup_type(unsigned long ip);
 extern void early_fixup_exception(struct pt_regs *regs, int trapnr);
 
+#ifdef CONFIG_X86_MCE
+extern void ex_handler_msr_mce(struct pt_regs *regs, bool wrmsr);
+#else
+static inline void ex_handler_msr_mce(struct pt_regs *regs, bool wrmsr) { }
+#endif
+
+#if defined(CONFIG_BPF_JIT) && defined(CONFIG_X86_64)
+bool ex_handler_bpf(const struct exception_table_entry *x, struct pt_regs *regs);
+#else
+static inline bool ex_handler_bpf(const struct exception_table_entry *x,
+				  struct pt_regs *regs) { return false; }
+#endif
+
 #endif