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-rw-r--r--src/arch/x86/include/arch/acpi.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/src/arch/x86/include/arch/acpi.h b/src/arch/x86/include/arch/acpi.h
index 9f790ccf99..8c8106d76e 100644
--- a/src/arch/x86/include/arch/acpi.h
+++ b/src/arch/x86/include/arch/acpi.h
@@ -310,6 +310,10 @@ typedef struct acpi_fadt {
#define ACPI_FADT_REV_ACPI_4_0 4
#define ACPI_FADT_REV_ACPI_5_0 5
+/* Flags for p_lvl2_lat and p_lvl3_lat */
+#define ACPI_FADT_C2_NOT_SUPPORTED 101
+#define ACPI_FADT_C3_NOT_SUPPORTED 1001
+
/* FADT Feature Flags */
#define ACPI_FADT_WBINVD (1 << 0)
#define ACPI_FADT_WBINVD_FLUSH (1 << 1)