1 files changed, 33 insertions, 0 deletions

diff --git a/arch/x86/kernel/cpu/bugs_64.c b/arch/x86/kernel/cpu/bugs_64.c
new file mode 100644
index 000000000000..9a3ed0649d4e
--- /dev/null
+++ b/arch/x86/kernel/cpu/bugs_64.c
@@ -0,0 +1,33 @@
+/*
+ *  Copyright (C) 1994  Linus Torvalds
+ *  Copyright (C) 2000  SuSE
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <asm/alternative.h>
+#include <asm/bugs.h>
+#include <asm/processor.h>
+#include <asm/mtrr.h>
+#include <asm/cacheflush.h>
+
+void __init check_bugs(void)
+{
+        identify_boot_cpu();
+#if !defined(CONFIG_SMP)
+        printk("CPU: ");
+        print_cpu_info(&boot_cpu_data);
+#endif
+        alternative_instructions();
+
+        /*
+         * Make sure the first 2MB area is not mapped by huge pages
+         * There are typically fixed size MTRRs in there and overlapping
+         * MTRRs into large pages causes slow downs.
+         *
+         * Right now we don't do that with gbpages because there seems
+         * very little benefit for that case.
+         */
+        if (!direct_gbpages)
+                set_memory_4k((unsigned long)__va(0), 1);
+}