x86/bugs, KVM: Support the combination of guest and host IBRS

[mirror_ubuntu-artful-kernel.git] / arch / x86 / include / asm / traps.h

diff --git a/arch/x86/include/asm/traps.h b/arch/x86/include/asm/traps.h
index 01fd0a7f48cd2f97dac2c1fd20e809e17975ad34..c3b652672d6f1b943bd2b5641b203bb7e544195a 100644 (file)
--- a/arch/x86/include/asm/traps.h
+++ b/arch/x86/include/asm/traps.h
@@ -13,9 +13,6 @@ asmlinkage void divide_error(void);
 asmlinkage void debug(void);
 asmlinkage void nmi(void);
 asmlinkage void int3(void);
-asmlinkage void xen_debug(void);
-asmlinkage void xen_int3(void);
-asmlinkage void xen_stack_segment(void);
 asmlinkage void overflow(void);
 asmlinkage void bounds(void);
 asmlinkage void invalid_op(void);
@@ -39,7 +36,6 @@ asmlinkage void machine_check(void);
 asmlinkage void simd_coprocessor_error(void);
 
 #ifdef CONFIG_TRACING
-asmlinkage void trace_page_fault(void);
 #define trace_stack_segment stack_segment
 #define trace_divide_error divide_error
 #define trace_bounds bounds
@@ -54,6 +50,32 @@ asmlinkage void trace_page_fault(void);
 #define trace_alignment_check alignment_check
 #define trace_simd_coprocessor_error simd_coprocessor_error
 #define trace_async_page_fault async_page_fault
+#define trace_page_fault page_fault
+#endif
+
+#if defined(CONFIG_X86_64) && defined(CONFIG_XEN_PV)
+asmlinkage void xen_divide_error(void);
+asmlinkage void xen_xennmi(void);
+asmlinkage void xen_xendebug(void);
+asmlinkage void xen_xenint3(void);
+asmlinkage void xen_overflow(void);
+asmlinkage void xen_bounds(void);
+asmlinkage void xen_invalid_op(void);
+asmlinkage void xen_device_not_available(void);
+asmlinkage void xen_double_fault(void);
+asmlinkage void xen_coprocessor_segment_overrun(void);
+asmlinkage void xen_invalid_TSS(void);
+asmlinkage void xen_segment_not_present(void);
+asmlinkage void xen_stack_segment(void);
+asmlinkage void xen_general_protection(void);
+asmlinkage void xen_page_fault(void);
+asmlinkage void xen_spurious_interrupt_bug(void);
+asmlinkage void xen_coprocessor_error(void);
+asmlinkage void xen_alignment_check(void);
+#ifdef CONFIG_X86_MCE
+asmlinkage void xen_machine_check(void);
+#endif /* CONFIG_X86_MCE */
+asmlinkage void xen_simd_coprocessor_error(void);
 #endif
 
 dotraplinkage void do_divide_error(struct pt_regs *, long);
@@ -70,18 +92,9 @@ dotraplinkage void do_segment_not_present(struct pt_regs *, long);
 dotraplinkage void do_stack_segment(struct pt_regs *, long);
 #ifdef CONFIG_X86_64
 dotraplinkage void do_double_fault(struct pt_regs *, long);
-asmlinkage struct pt_regs *sync_regs(struct pt_regs *);
 #endif
 dotraplinkage void do_general_protection(struct pt_regs *, long);
 dotraplinkage void do_page_fault(struct pt_regs *, unsigned long);
-#ifdef CONFIG_TRACING
-dotraplinkage void trace_do_page_fault(struct pt_regs *, unsigned long);
-#else
-static inline void trace_do_page_fault(struct pt_regs *regs, unsigned long error)
-{
-       do_page_fault(regs, error);
-}
-#endif
 dotraplinkage void do_spurious_interrupt_bug(struct pt_regs *, long);
 dotraplinkage void do_coprocessor_error(struct pt_regs *, long);
 dotraplinkage void do_alignment_check(struct pt_regs *, long);
@@ -148,4 +161,22 @@ enum {
        X86_TRAP_IRET = 32,     /* 32, IRET Exception */
 };
 
+/*
+ * Page fault error code bits:
+ *
+ *   bit 0 ==   0: no page found       1: protection fault
+ *   bit 1 ==   0: read access         1: write access
+ *   bit 2 ==   0: kernel-mode access  1: user-mode access
+ *   bit 3 ==                          1: use of reserved bit detected
+ *   bit 4 ==                          1: fault was an instruction fetch
+ *   bit 5 ==                          1: protection keys block access
+ */
+enum x86_pf_error_code {
+       X86_PF_PROT     =               1 << 0,
+       X86_PF_WRITE    =               1 << 1,
+       X86_PF_USER     =               1 << 2,
+       X86_PF_RSVD     =               1 << 3,
+       X86_PF_INSTR    =               1 << 4,
+       X86_PF_PK       =               1 << 5,
+};
 #endif /* _ASM_X86_TRAPS_H */