From b939bde2788a7f16741e563ee90f6f3ad38935cf Mon Sep 17 00:00:00 2001
From: Alexander van Heukelum <heukelum@fastmail.fm>
Date: Tue, 9 Sep 2008 21:56:12 +0200
Subject: [PATCH] i386: convert hardware exception 19 to an interrupt gate
Handle SIMD coprocessor exception with interrupt initially off.
Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---
arch/x86/kernel/traps_32.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/arch/x86/kernel/traps_32.c b/arch/x86/kernel/traps_32.c
index 54b89f497bac7..1bd7960b13572 100644
--- a/arch/x86/kernel/traps_32.c
+++ b/arch/x86/kernel/traps_32.c
@@ -1144,6 +1144,8 @@ static void simd_math_error(void __user *ip)
void do_simd_coprocessor_error(struct pt_regs *regs, long error_code)
{
+ conditional_sti(regs);
+
if (cpu_has_xmm) {
/* Handle SIMD FPU exceptions on PIII+ processors. */
ignore_fpu_irq = 1;
@@ -1294,7 +1296,7 @@ void __init trap_init(void)
#ifdef CONFIG_X86_MCE
set_intr_gate(18, &machine_check);
#endif
- set_trap_gate(19, &simd_coprocessor_error);
+ set_intr_gate(19, &simd_coprocessor_error);
if (cpu_has_fxsr) {
printk(KERN_INFO "Enabling fast FPU save and restore... ");
--
2.30.2