From 0bf7c314ff68622468945a24ea2f7ebc1edf0a6b Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Thu, 21 May 2020 22:05:36 +0200 Subject: x86/entry: Add IRQENTRY_IRQ macro Provide a seperate IDTENTRY macro for device interrupts. Similar to IDTENTRY_ERRORCODE with the addition of invoking irq_enter/exit_rcu() and providing the errorcode as a 'u8' argument to the C function, which truncates the sign extended vector number. Signed-off-by: Thomas Gleixner Signed-off-by: Ingo Molnar Acked-by: Andy Lutomirski Link: https://lore.kernel.org/r/20200521202118.984573165@linutronix.de --- arch/x86/entry/entry_32.S | 14 ++++++++++++++ 1 file changed, 14 insertions(+) (limited to 'arch/x86/entry/entry_32.S') diff --git a/arch/x86/entry/entry_32.S b/arch/x86/entry/entry_32.S index 40092c81dcb8..ba2a70d7118a 100644 --- a/arch/x86/entry/entry_32.S +++ b/arch/x86/entry/entry_32.S @@ -751,6 +751,20 @@ SYM_CODE_START(\asmsym) SYM_CODE_END(\asmsym) .endm +.macro idtentry_irq vector cfunc + .p2align CONFIG_X86_L1_CACHE_SHIFT +SYM_CODE_START_LOCAL(asm_\cfunc) + ASM_CLAC + SAVE_ALL switch_stacks=1 + ENCODE_FRAME_POINTER + movl %esp, %eax + movl PT_ORIG_EAX(%esp), %edx /* get the vector from stack */ + movl $-1, PT_ORIG_EAX(%esp) /* no syscall to restart */ + call \cfunc + jmp handle_exception_return +SYM_CODE_END(asm_\cfunc) +.endm + /* * Include the defines which emit the idt entries which are shared * shared between 32 and 64 bit. -- cgit v1.2.3