Messages in this thread Patch in this message | | | Date | Tue, 25 Feb 2020 23:47:22 +0100 | From | Thomas Gleixner <> | Subject | [patch 03/15] x86/entry: Add IRQENTRY_IRQ macro |
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Provide a seperate IDTENTRY macro for device interrupts, which supports the interrupt stack switch mode on 64 bit. Otherwise its the same as IDTENTRY_ERRORCODE.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de> --- arch/x86/include/asm/idtentry.h | 44 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 44 insertions(+)
--- a/arch/x86/include/asm/idtentry.h +++ b/arch/x86/include/asm/idtentry.h @@ -171,6 +171,46 @@ static __always_inline void __##func(str unsigned long error_code, \ unsigned long address) +/** + * DECLARE_IDTENTRY_IRQ - Declare functions for device interrupt IDT entry + * points (common/spurious) + * @vector: Vector number (ignored for C) + * @func: Function name of the entry point + * + * Declares three functions: + * - The ASM entry point: asm_##func + * - The XEN PV trap entry point: xen_##func (maybe unused) + * - The C handler called from the ASM entry point + */ +#define DECLARE_IDTENTRY_IRQ(vector, func) \ + asmlinkage void asm_##func(void); \ + asmlinkage void xen_asm_##func(void); \ + __visible void func(struct pt_regs *regs, unsigned long vector) + +/** + * DEFINE_IDTENTRY_IRQ - Emit code for device interrupt IDT entry points + * @func: Function name of the entry point + * + * @func is called from ASM entry code with interrupts disabled. + * + * Used for C handlers which require the vector number. + */ +#define DEFINE_IDTENTRY_IRQ(func) \ +static __always_inline void __##func(struct pt_regs *regs, \ + unsigned long vector); \ + \ +__visible notrace __irq_entry void func(struct pt_regs *regs, \ + unsigned long vector) \ +{ \ + idtentry_enter(regs); \ + __##func (regs, vector); \ + idtentry_exit(regs); \ +} \ +NOKPROBE_SYMBOL(func); \ + \ +static __always_inline void __##func(struct pt_regs *regs, \ + unsigned long vector) + #ifdef CONFIG_X86_64 /** * DECLARE_IDTENTRY_IST - Declare functions for IST handling IDT entry points @@ -340,6 +380,10 @@ static __always_inline void __##func(str /* Special case for 32bit IRET 'trap'. Do not emit ASM code */ #define DECLARE_IDTENTRY_SW(vector, func) +/* Entries for common/spurious (device) interrupts */ +#define DECLARE_IDTENTRY_IRQ(vector, func) \ + idtentry_irq vector func + #ifdef CONFIG_X86_64 # define DECLARE_IDTENTRY_MCE(vector, func) \ idtentry_mce_db vector asm_##func func
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