Some exception handlers need to do extra work before any of the entry helpers are invoked. Provide IDTENTRY_RAW for this.
Signed-off-by: Thomas Gleixner <[email protected]> --- arch/x86/include/asm/idtentry.h | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) --- a/arch/x86/include/asm/idtentry.h +++ b/arch/x86/include/asm/idtentry.h @@ -104,6 +104,34 @@ static __always_inline void __##func(str static __always_inline void __##func(struct pt_regs *regs, \ unsigned long error_code) +/** + * DECLARE_IDTENTRY_RAW - Declare functions for raw IDT entry points + * No error code pushed by hardware + * @vector: Vector number (ignored for C) + * @func: Function name of the entry point + * + * Maps to DECLARE_IDTENTRY(). + */ +#define DECLARE_IDTENTRY_RAW(vector, func) \ + DECLARE_IDTENTRY(vector, func) + +/** + * DEFINE_IDTENTRY_RAW - Emit code for raw IDT entry points + * @func: Function name of the entry point + * + * @func is called from ASM entry code with interrupts disabled. + * + * The macro is written so it acts as function definition. Append the + * body with a pair of curly brackets. + * + * Contrary to DEFINE_IDTENTRY() this does not invoke the + * idtentry_enter/exit() helpers before and after the body invocation. This + * needs to be done in the body itself if applicable. Use if extra work + * is required before the enter/exit() helpers are invoked. + */ +#define DEFINE_IDTENTRY_RAW(func) \ +__visible noinstr void func(struct pt_regs *regs) + #else /* !__ASSEMBLY__ */ /* @@ -118,6 +146,9 @@ static __always_inline void __##func(str /* Special case for 32bit IRET 'trap'. Do not emit ASM code */ #define DECLARE_IDTENTRY_SW(vector, func) +#define DECLARE_IDTENTRY_RAW(vector, func) \ + DECLARE_IDTENTRY(vector, func) + #endif /* __ASSEMBLY__ */ /*
