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-rw-r--r--sys/include/arch/amd64/cpu.h7
1 files changed, 4 insertions, 3 deletions
diff --git a/sys/include/arch/amd64/cpu.h b/sys/include/arch/amd64/cpu.h
index 3dadebd..6ed675e 100644
--- a/sys/include/arch/amd64/cpu.h
+++ b/sys/include/arch/amd64/cpu.h
@@ -42,9 +42,10 @@
#define CPU_IRQ(IRQ_N) (BIT((IRQ_N)) & 0xFF)
/* Feature bits */
-#define CPU_FEAT_SMAP BIT(0)
-#define CPU_FEAT_SMEP BIT(1)
-#define CPU_FEAT_UMIP BIT(2)
+#define CPU_FEAT_SMAP BIT(0)
+#define CPU_FEAT_SMEP BIT(1)
+#define CPU_FEAT_UMIP BIT(2)
+#define CPU_FEAT_TSCINV BIT(3) /* TSC invariant */
/* CPU vendors */
#define CPU_VENDOR_OTHER 0x00000000