Add support to detect ARM variant on Windows

jiria · jiria · commit e6529f4ebc46 · 2018-10-10T14:17:11.000-07:00
ARM variant detection logic was authored originally with
POSIX OS in mind. This change leaves POSIX code path unaltered
and adds support to detect ARM variant on Windows by leveraging
runtime.goarch.

Signed-off-by: Jiri Appl &lt;jiria@microsoft.com&gt;
diff --git a/platforms/cpuinfo.go b/platforms/cpuinfo.go
@@ -74,6 +74,22 @@ func getCPUInfo(pattern string) (info string, err error) {
 }
 
 func getCPUVariant() string {
+	if runtime.GOOS == "windows" {
+		// Windows only supports v7 for ARM32 and v8 for ARM64 and so we can use
+		// runtime.GOARCH to determine the variants
+		var variant string
+		switch runtime.GOARCH {
+		case "arm64":
+			variant = "v8"
+		case "arm":
+			variant = "v7"
+		default:
+			variant = "unknown"
+		}
+
+		return variant
+	}
+
 	variant, err := getCPUInfo("Cpu architecture")
 	if err != nil {
 		log.L.WithError(err).Error("failure getting variant")
