From 45bfdffcb2e00fda595b3f9318469f6b0d29cbe4 Mon Sep 17 00:00:00 2001
From: Marvin Borner
Date: Tue, 18 May 2021 22:06:59 +0200
Subject: Fixed issues with intel emulation

---
 kernel/drivers/cpu.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

(limited to 'kernel/drivers/cpu.c')

diff --git a/kernel/drivers/cpu.c b/kernel/drivers/cpu.c
index 5d53bef..296e73a 100644
--- a/kernel/drivers/cpu.c
+++ b/kernel/drivers/cpu.c
@@ -179,12 +179,14 @@ CLEAR void cpu_enable_features(void)
 
 void clac(void)
 {
-	__asm__ volatile("clac" ::: "cc");
+	if (cpu_extended_features.ebx & CPUID_EXT_FEAT_EBX_SMAP)
+		__asm__ volatile("clac" ::: "cc");
 }
 
 void stac(void)
 {
-	__asm__ volatile("stac" ::: "cc");
+	if (cpu_extended_features.ebx & CPUID_EXT_FEAT_EBX_SMAP)
+		__asm__ volatile("stac" ::: "cc");
 }
 
 CLEAR void cli(void)
-- 
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