Messages in this thread Patch in this message | | | Date | Tue, 25 Feb 2020 23:33:24 +0100 | From | Thomas Gleixner <> | Subject | [patch 03/16] x86/idtentry: Provide IDTENTRY_XEN for XEN/PV |
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XEN/PV has special wrappers for NMI and DB exceptions. They redirect these exceptions through regular IDTENTRY points. Provide the necessary IDTENTRY macros to make this work
Signed-off-by: Thomas Gleixner <tglx@linutronix.de> --- arch/x86/include/asm/idtentry.h | 18 +++++++++++++++++- 1 file changed, 17 insertions(+), 1 deletion(-)
--- a/arch/x86/include/asm/idtentry.h +++ b/arch/x86/include/asm/idtentry.h @@ -163,6 +163,18 @@ static __always_inline void __##func(str #define DECLARE_IDTENTRY_DEBUG DECLARE_IDTENTRY_IST #define DEFINE_IDTENTRY_DEBUG DEFINE_IDTENTRY_IST +/** + * DECLARE_IDTENTRY_XEN - Declare functions for XEN redirect IDT entry points + * @vector: Vector number (ignored for C) + * @func: Function name of the entry point + * + * Used for xennmi and xendebug redirections. No DEFINE as this is all + * indirection magic. + */ +#define DECLARE_IDTENTRY_XEN(vector, func) \ + asmlinkage void xen_asm_exc_xen##func(void); \ + asmlinkage void asm_exc_xen##func(void) + #else /* !__ASSEMBLY__ */ /* Defines for ASM code to construct the IDT entries */ @@ -191,7 +203,11 @@ static __always_inline void __##func(str #endif /* No ASM code emitted for NMI */ -# define DECLARE_IDTENTRY_NMI(vector, func) +#define DECLARE_IDTENTRY_NMI(vector, func) + +/* XEN NMI and DB wrapper */ +#define DECLARE_IDTENTRY_XEN(vector, func) \ + idtentry vector asm_exc_xen##func exc_##func has_error_code=0 #endif /* __ASSEMBLY__ */
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