Add Intel Gracemont uarch (#303)

Author: fbarchard

include/cpuinfo.h

@@ -373,6 +373,8 @@ enum cpuinfo_uarch {
 	cpuinfo_uarch_goldmont = 0x00100404,
 	/** Intel Goldmont Plus microarchitecture (Gemini Lake). */
 	cpuinfo_uarch_goldmont_plus = 0x00100405,
+	/** Intel Gracemont microarchitecture (Twin Lake). */
+	cpuinfo_uarch_gracemont = 0x00100406,
 	/** Intel Crestmont microarchitecture (Sierra Forest). */
 	cpuinfo_uarch_crestmont = 0x00100407,
 

src/x86/uarch.c

@@ -188,6 +188,8 @@ enum cpuinfo_uarch cpuinfo_x86_decode_uarch(
 						case 0x5A: // Moorefield
 						case 0x5D: // SoFIA
 							return cpuinfo_uarch_silvermont;
+						case 0xBE: // Twin Lake
+							return cpuinfo_uarch_gracemont;
 						case 0xAF: // Sierra Forest
 							return cpuinfo_uarch_crestmont;
 						case 0x4C: // Braswell, Cherry

tools/cpu-info.c

@@ -92,6 +92,8 @@ static const char* uarch_to_string(enum cpuinfo_uarch uarch) {
 			return "Saltwell";
 		case cpuinfo_uarch_silvermont:
 			return "Silvermont";
+		case cpuinfo_uarch_gracemont:
+			return "Gracemont";
 		case cpuinfo_uarch_crestmont:
 			return "Crestmont";
 		case cpuinfo_uarch_airmont: