[tip:x86/apic] x86/idt: Move interrupt gate initialization to IDT code

[tip-bot for Thomas Gleixner]

Commit-ID:  dc20b2d526539344d7175a2a83221337302596b8
Gitweb:     http://git.kernel.org/tip/dc20b2d526539344d7175a2a83221337302596b8
Author:     Thomas Gleixner <tglx@xxxxxxxxxxxxx>
AuthorDate: Mon, 28 Aug 2017 08:47:55 +0200
Committer:  Ingo Molnar <mingo@xxxxxxxxxx>
CommitDate: Tue, 29 Aug 2017 12:07:28 +0200

x86/idt: Move interrupt gate initialization to IDT code

Move the gate intialization from interrupt init to the IDT code so all IDT
related operations are at a single place.

Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Andy Lutomirski <luto@xxxxxxxxxx>
Cc: Borislav Petkov <bp@xxxxxxxxx>
Cc: Brian Gerst <brgerst@xxxxxxxxx>
Cc: Denys Vlasenko <dvlasenk@xxxxxxxxxx>
Cc: H. Peter Anvin <hpa@xxxxxxxxx>
Cc: Josh Poimboeuf <jpoimboe@xxxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Steven Rostedt <rostedt@xxxxxxxxxxx>
Link: http://lkml.kernel.org/r/20170828064959.340209198@xxxxxxxxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
 arch/x86/kernel/idt.c     | 18 ++++++++++++++++++
 arch/x86/kernel/irqinit.c | 18 ------------------
 2 files changed, 18 insertions(+), 18 deletions(-)

diff --git a/arch/x86/kernel/idt.c b/arch/x86/kernel/idt.c
index 4327104..99f93a6 100644
--- a/arch/x86/kernel/idt.c
+++ b/arch/x86/kernel/idt.c
@@ -286,7 +286,25 @@ void __init idt_setup_debugidt_traps(void)
  */
 void __init idt_setup_apic_and_irq_gates(void)
 {
+	int i = FIRST_EXTERNAL_VECTOR;
+	void *entry;
+
 	idt_setup_from_table(idt_table, apic_idts, ARRAY_SIZE(apic_idts));
+
+	for_each_clear_bit_from(i, used_vectors, FIRST_SYSTEM_VECTOR) {
+		entry = irq_entries_start + 8 * (i - FIRST_EXTERNAL_VECTOR);
+		set_intr_gate(i, entry);
+	}
+
+	for_each_clear_bit_from(i, used_vectors, NR_VECTORS) {
+#ifdef CONFIG_X86_LOCAL_APIC
+		set_bit(i, used_vectors);
+		set_intr_gate(i, spurious_interrupt);
+#else
+		entry = irq_entries_start + 8 * (i - FIRST_EXTERNAL_VECTOR);
+		set_intr_gate(i, entry);
+#endif
+	}
 }
 
 /**
diff --git a/arch/x86/kernel/irqinit.c b/arch/x86/kernel/irqinit.c
index 218cd06..1add9e0 100644
--- a/arch/x86/kernel/irqinit.c
+++ b/arch/x86/kernel/irqinit.c
@@ -89,29 +89,11 @@ void __init init_IRQ(void)
 
 void __init native_init_IRQ(void)
 {
-	int i;
-
 	/* Execute any quirks before the call gates are initialised: */
 	x86_init.irqs.pre_vector_init();
 
 	idt_setup_apic_and_irq_gates();
 
-	/*
-	 * Cover the whole vector space, no vector can escape
-	 * us. (some of these will be overridden and become
-	 * 'special' SMP interrupts)
-	 */
-	i = FIRST_EXTERNAL_VECTOR;
-	for_each_clear_bit_from(i, used_vectors, FIRST_SYSTEM_VECTOR) {
-		/* IA32_SYSCALL_VECTOR could be used in trap_init already. */
-		set_intr_gate(i, irq_entries_start +
-				8 * (i - FIRST_EXTERNAL_VECTOR));
-	}
-#ifdef CONFIG_X86_LOCAL_APIC
-	for_each_clear_bit_from(i, used_vectors, NR_VECTORS)
-		set_intr_gate(i, spurious_interrupt);
-#endif
-
 	if (!acpi_ioapic && !of_ioapic && nr_legacy_irqs())
 		setup_irq(2, &irq2);