[release-branch.go1.14-std] cpu: add basic support for GOARCH=riscv64 Updates golang/go#27532 Change-Id: I7250f272ff46f2765d498a97644fb570ae745a6c Reviewed-on: https://go-review.googlesource.com/c/sys/+/206860 Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org> (cherry picked from commit 2f3576d2c59b42b60d62d49998f5ba42bf45c5f5) Reviewed-on: https://go-review.googlesource.com/c/sys/+/217339 Run-TryBot: Filippo Valsorda <filippo@golang.org> Reviewed-by: Ian Lance Taylor <iant@golang.org>

diff --git a/cpu/cpu_riscv64.go b/cpu/cpu_riscv64.go
new file mode 100644
index 0000000..efe2b7a
--- /dev/null
+++ b/cpu/cpu_riscv64.go

@@ -0,0 +1,9 @@
+// Copyright 2019 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build riscv64
+
+package cpu
+
+const cacheLineSize = 32