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authorThomas Gleixner <tglx@linutronix.de>2020-05-21 22:05:36 +0200
committerThomas Gleixner <tglx@linutronix.de>2020-06-11 15:15:12 +0200
commit0bf7c314ff68622468945a24ea2f7ebc1edf0a6b (patch)
tree4e3e262f8d7e2dc1b020c5574a72e0427f95ff70 /arch/x86/entry/entry_32.S
parent7c2a57364cae0f2e070a27d728f1df6844ffff56 (diff)
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 <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@kernel.org> Acked-by: Andy Lutomirski <luto@kernel.org> Link: https://lore.kernel.org/r/20200521202118.984573165@linutronix.de
Diffstat (limited to 'arch/x86/entry/entry_32.S')
-rw-r--r--arch/x86/entry/entry_32.S14
1 files changed, 14 insertions, 0 deletions
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.