x86/irq: Seperate unused system vectors from spurious entry again

[platform/kernel/linux-rpi.git] / arch / x86 / entry / entry_64.S

diff --git a/arch/x86/entry/entry_64.S b/arch/x86/entry/entry_64.S
index 20e45d9..6d83599 100644 (file)
--- a/arch/x86/entry/entry_64.S
+++ b/arch/x86/entry/entry_64.S
@@ -375,6 +375,18 @@ ENTRY(irq_entries_start)
     .endr
 END(irq_entries_start)
 
+       .align 8
+ENTRY(spurious_entries_start)
+    vector=FIRST_SYSTEM_VECTOR
+    .rept (NR_VECTORS - FIRST_SYSTEM_VECTOR)
+       UNWIND_HINT_IRET_REGS
+       pushq   $(~vector+0x80)                 /* Note: always in signed byte range */
+       jmp     common_spurious
+       .align  8
+       vector=vector+1
+    .endr
+END(spurious_entries_start)
+
 .macro DEBUG_ENTRY_ASSERT_IRQS_OFF
 #ifdef CONFIG_DEBUG_ENTRY
        pushq %rax
@@ -571,10 +583,20 @@ _ASM_NOKPROBE(interrupt_entry)
 
 /* Interrupt entry/exit. */
 
-       /*
-        * The interrupt stubs push (~vector+0x80) onto the stack and
-        * then jump to common_interrupt.
-        */
+/*
+ * The interrupt stubs push (~vector+0x80) onto the stack and
+ * then jump to common_spurious/interrupt.
+ */
+common_spurious:
+       addq    $-0x80, (%rsp)                  /* Adjust vector to [-256, -1] range */
+       call    interrupt_entry
+       UNWIND_HINT_REGS indirect=1
+       call    smp_spurious_interrupt          /* rdi points to pt_regs */
+       jmp     ret_from_intr
+END(common_spurious)
+_ASM_NOKPROBE(common_spurious)
+
+/* common_interrupt is a hotpath. Align it */
        .p2align CONFIG_X86_L1_CACHE_SHIFT
 common_interrupt:
        addq    $-0x80, (%rsp)                  /* Adjust vector to [-256, -1] range */