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Diffstat (limited to 'arch/x86_64/kernel/mce.c')
-rw-r--r--arch/x86_64/kernel/mce.c14
1 files changed, 14 insertions, 0 deletions
diff --git a/arch/x86_64/kernel/mce.c b/arch/x86_64/kernel/mce.c
index 4d8450ee363..a66d607f5b9 100644
--- a/arch/x86_64/kernel/mce.c
+++ b/arch/x86_64/kernel/mce.c
@@ -667,6 +667,20 @@ static struct miscdevice mce_log_device = {
&mce_chrdev_ops,
};
+static unsigned long old_cr4 __initdata;
+
+void __init stop_mce(void)
+{
+ old_cr4 = read_cr4();
+ clear_in_cr4(X86_CR4_MCE);
+}
+
+void __init restart_mce(void)
+{
+ if (old_cr4 & X86_CR4_MCE)
+ set_in_cr4(X86_CR4_MCE);
+}
+
/*
* Old style boot options parsing. Only for compatibility.
*/