summaryrefslogtreecommitdiffstats
path: root/arch/x86/boot/main.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/x86/boot/main.c')
-rw-r--r--arch/x86/boot/main.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/x86/boot/main.c b/arch/x86/boot/main.c
index 2296164b54d..197421db1af 100644
--- a/arch/x86/boot/main.c
+++ b/arch/x86/boot/main.c
@@ -73,6 +73,11 @@ static void keyboard_set_repeat(void)
*/
static void query_ist(void)
{
+ /* Some older BIOSes apparently crash on this call, so filter
+ it from machines too old to have SpeedStep at all. */
+ if (cpu.level < 6)
+ return;
+
asm("int $0x15"
: "=a" (boot_params.ist_info.signature),
"=b" (boot_params.ist_info.command),