From dc20b2d526539344d7175a2a83221337302596b8 Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Mon, 28 Aug 2017 08:47:55 +0200
Subject: 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@linutronix.de>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/r/20170828064959.340209198@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---
 arch/x86/kernel/idt.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

(limited to 'arch/x86/kernel/idt.c')

diff --git a/arch/x86/kernel/idt.c b/arch/x86/kernel/idt.c
index 4327104f5af8..99f93a6fb92a 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
+	}
 }
 
 /**
-- 
cgit v1.2.3