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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>
hifive-unleashed-5.1
Alexander van Heukelum 2008-09-09 21:56:12 +02:00 committed by Ingo Molnar
parent eb642f6208
commit b939bde278
1 changed files with 3 additions and 1 deletions
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4
arch/x86/kernel/traps_32.c
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@ -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... ");