From 7d847af2666ca6204d66b253b87019eb961f5812 Mon Sep 17 00:00:00 2001
From: misaka00251 <liuxin@iscas.ac.cn>
Date: Fri, 1 Sep 2023 16:25:48 +0800
Subject: [PATCH] Add riscv64 support for crc32 & procfs

---
 .../klauspost/crc32/crc32_generic.go              |  2 +-
 .../github.com/prometheus/procfs/cpuinfo.go       | 40 +++++++++++++++++++
 .../prometheus/procfs/cpuinfo_riscvx.go           | 20 ++++++++++
 .../github.com/prometheus/procfs/cpuinfo.go       | 41 +++++++++++++++++++
 .../prometheus/procfs/cpuinfo_riscvx.go           | 20 +++++++++
 5 files changed, 121 insertions(+), 1 deletion(-)
 create mode 100644 cmd/vendor/github.com/prometheus/procfs/cpuinfo_riscvx.go
 create mode 100644 vendor/github.com/prometheus/procfs/cpuinfo_riscvx.go

diff --git a/cmd/vendor/github.com/klauspost/crc32/crc32_generic.go b/cmd/vendor/github.com/klauspost/crc32/crc32_generic.go
index c4d06a2..e2673f5 100644
--- a/cmd/vendor/github.com/klauspost/crc32/crc32_generic.go
+++ b/cmd/vendor/github.com/klauspost/crc32/crc32_generic.go
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build 386 arm arm64 ppc64 ppc64le appengine loong64
+// +build 386 arm arm64 ppc64 ppc64le appengine loong64 riscv64
 
 package crc32
 
diff --git a/cmd/vendor/github.com/prometheus/procfs/cpuinfo.go b/cmd/vendor/github.com/prometheus/procfs/cpuinfo.go
index 2c2a27f..ad9761b 100644
--- a/cmd/vendor/github.com/prometheus/procfs/cpuinfo.go
+++ b/cmd/vendor/github.com/prometheus/procfs/cpuinfo.go
@@ -443,6 +443,46 @@ func parseCPUInfoPPC(info []byte) ([]CPUInfo, error) {
 	return cpuinfo, nil
 }
 
+func parseCPUInfoRISCV(info []byte) ([]CPUInfo, error) {
+	scanner := bufio.NewScanner(bytes.NewReader(info))
+
+	firstLine := firstNonEmptyLine(scanner)
+	if !strings.HasPrefix(firstLine, "processor") || !strings.Contains(firstLine, ":") {
+		return nil, errors.New("invalid cpuinfo file: " + firstLine)
+	}
+	field := strings.SplitN(firstLine, ": ", 2)
+	v, err := strconv.ParseUint(field[1], 0, 32)
+	if err != nil {
+		return nil, err
+	}
+	firstcpu := CPUInfo{Processor: uint(v)}
+	cpuinfo := []CPUInfo{firstcpu}
+	i := 0
+
+	for scanner.Scan() {
+		line := scanner.Text()
+		if !strings.Contains(line, ":") {
+			continue
+		}
+		field := strings.SplitN(line, ": ", 2)
+		switch strings.TrimSpace(field[0]) {
+		case "processor":
+			v, err := strconv.ParseUint(field[1], 0, 32)
+			if err != nil {
+				return nil, err
+			}
+			i = int(v)
+			cpuinfo = append(cpuinfo, CPUInfo{}) // start of the next processor
+			cpuinfo[i].Processor = uint(v)
+		case "hart":
+			cpuinfo[i].CoreID = field[1]
+		case "isa":
+			cpuinfo[i].ModelName = field[1]
+		}
+	}
+	return cpuinfo, nil
+}
+
 // firstNonEmptyLine advances the scanner to the first non-empty line
 // and returns the contents of that line
 func firstNonEmptyLine(scanner *bufio.Scanner) string {
diff --git a/cmd/vendor/github.com/prometheus/procfs/cpuinfo_riscvx.go b/cmd/vendor/github.com/prometheus/procfs/cpuinfo_riscvx.go
new file mode 100644
index 0000000..1c9b731
--- /dev/null
+++ b/cmd/vendor/github.com/prometheus/procfs/cpuinfo_riscvx.go
@@ -0,0 +1,20 @@
+// Copyright 2020 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+//go:build linux && (riscv || riscv64)
+// +build linux
+// +build riscv riscv64
+
+package procfs
+
+var parseCPUInfo = parseCPUInfoRISCV
diff --git a/vendor/github.com/prometheus/procfs/cpuinfo.go b/vendor/github.com/prometheus/procfs/cpuinfo.go
index 81db195..abd85d8 100644
--- a/vendor/github.com/prometheus/procfs/cpuinfo.go
+++ b/vendor/github.com/prometheus/procfs/cpuinfo.go
@@ -444,6 +444,46 @@ func parseCPUInfoPPC(info []byte) ([]CPUInfo, error) {
 	return cpuinfo, nil
 }
 
+func parseCPUInfoRISCV(info []byte) ([]CPUInfo, error) {
+	scanner := bufio.NewScanner(bytes.NewReader(info))
+
+	firstLine := firstNonEmptyLine(scanner)
+	if !strings.HasPrefix(firstLine, "processor") || !strings.Contains(firstLine, ":") {
+		return nil, errors.New("invalid cpuinfo file: " + firstLine)
+	}
+	field := strings.SplitN(firstLine, ": ", 2)
+	v, err := strconv.ParseUint(field[1], 0, 32)
+	if err != nil {
+		return nil, err
+	}
+	firstcpu := CPUInfo{Processor: uint(v)}
+	cpuinfo := []CPUInfo{firstcpu}
+	i := 0
+
+	for scanner.Scan() {
+		line := scanner.Text()
+		if !strings.Contains(line, ":") {
+			continue
+		}
+		field := strings.SplitN(line, ": ", 2)
+		switch strings.TrimSpace(field[0]) {
+		case "processor":
+			v, err := strconv.ParseUint(field[1], 0, 32)
+			if err != nil {
+				return nil, err
+			}
+			i = int(v)
+			cpuinfo = append(cpuinfo, CPUInfo{}) // start of the next processor
+			cpuinfo[i].Processor = uint(v)
+		case "hart":
+			cpuinfo[i].CoreID = field[1]
+		case "isa":
+			cpuinfo[i].ModelName = field[1]
+		}
+	}
+	return cpuinfo, nil
+}
+
 // firstNonEmptyLine advances the scanner to the first non-empty line
 // and returns the contents of that line
 func firstNonEmptyLine(scanner *bufio.Scanner) string {
diff --git a/vendor/github.com/prometheus/procfs/cpuinfo_riscvx.go b/vendor/github.com/prometheus/procfs/cpuinfo_riscvx.go
new file mode 100644
index 0000000..1c9b731
--- /dev/null
+++ b/vendor/github.com/prometheus/procfs/cpuinfo_riscvx.go
@@ -0,0 +1,20 @@
+// Copyright 2020 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+//go:build linux && (riscv || riscv64)
+// +build linux
+// +build riscv riscv64
+
+package procfs
+
+var parseCPUInfo = parseCPUInfoRISCV
-- 
2.39.2 (Apple Git-143)