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-rw-r--r--arch/x86/lib/cpu.c38
1 files changed, 38 insertions, 0 deletions
diff --git a/arch/x86/lib/cpu.c b/arch/x86/lib/cpu.c
new file mode 100644
index 000000000..7ad68917a
--- /dev/null
+++ b/arch/x86/lib/cpu.c
@@ -0,0 +1,38 @@
+// SPDX-License-Identifier: GPL-2.0-only
+#include <linux/types.h>
+#include <linux/export.h>
+#include <asm/cpu.h>
+
+unsigned int x86_family(unsigned int sig)
+{
+ unsigned int x86;
+
+ x86 = (sig >> 8) & 0xf;
+
+ if (x86 == 0xf)
+ x86 += (sig >> 20) & 0xff;
+
+ return x86;
+}
+EXPORT_SYMBOL_GPL(x86_family);
+
+unsigned int x86_model(unsigned int sig)
+{
+ unsigned int fam, model;
+
+ fam = x86_family(sig);
+
+ model = (sig >> 4) & 0xf;
+
+ if (fam >= 0x6)
+ model += ((sig >> 16) & 0xf) << 4;
+
+ return model;
+}
+EXPORT_SYMBOL_GPL(x86_model);
+
+unsigned int x86_stepping(unsigned int sig)
+{
+ return sig & 0xf;
+}
+EXPORT_SYMBOL_GPL(x86_stepping);