From baa553da07e8e2ea48ca2a727cb72c959b4665e9 Mon Sep 17 00:00:00 2001
From: Nitesh Konkar <niteshkonkar@in.ibm.com>
Date: Thu, 31 May 2018 18:40:43 +0530
Subject: [PATCH] virtcontainers: Get qemu suppport for ppc64le

Fixes #302

Signed-off-by: Nitesh Konkar niteshkonkar@in.ibm.com
---
 virtcontainers/hypervisor.go     |   4 +-
 virtcontainers/qemu.go           |   2 +
 virtcontainers/qemu_arch_base.go |   3 +
 virtcontainers/qemu_ppc64le.go   | 137 +++++++++++++++++++++++++++++++
 4 files changed, 144 insertions(+), 2 deletions(-)
 create mode 100644 virtcontainers/qemu_ppc64le.go

diff --git a/virtcontainers/hypervisor.go b/virtcontainers/hypervisor.go
index 8b501a3f5a..44df113262 100644
--- a/virtcontainers/hypervisor.go
+++ b/virtcontainers/hypervisor.go
@@ -443,8 +443,8 @@ func getHostMemorySizeKb(memInfoPath string) (uint64, error) {
 
 // RunningOnVMM checks if the system is running inside a VM.
 func RunningOnVMM(cpuInfoPath string) (bool, error) {
-	if runtime.GOARCH == "arm64" {
-		virtLog.Debugf("Unable to know if the system is running inside a VM")
+	if runtime.GOARCH == "arm64" || runtime.GOARCH == "ppc64le" {
+		virtLog.Info("Unable to know if the system is running inside a VM")
 		return false, nil
 	}
 
diff --git a/virtcontainers/qemu.go b/virtcontainers/qemu.go
index b19c4e3e99..efb1699b72 100644
--- a/virtcontainers/qemu.go
+++ b/virtcontainers/qemu.go
@@ -971,6 +971,8 @@ func genericBridges(number uint32, machineType string) []Bridge {
 		fallthrough
 	case QemuPC:
 		bt = pciBridge
+	case QemuPseries:
+		bt = pciBridge
 	default:
 		return nil
 	}
diff --git a/virtcontainers/qemu_arch_base.go b/virtcontainers/qemu_arch_base.go
index 49e97b7e02..54dbc3d1e3 100644
--- a/virtcontainers/qemu_arch_base.go
+++ b/virtcontainers/qemu_arch_base.go
@@ -134,6 +134,9 @@ const (
 
 	// QemuVirt is the QEMU virt machine type for aarch64
 	QemuVirt = "virt"
+
+	// QemuPseries is a QEMU virt machine type for for ppc64le
+	QemuPseries = "pseries"
 )
 
 // kernelParamsNonDebug is a list of the default kernel
diff --git a/virtcontainers/qemu_ppc64le.go b/virtcontainers/qemu_ppc64le.go
new file mode 100644
index 0000000000..10af79bc28
--- /dev/null
+++ b/virtcontainers/qemu_ppc64le.go
@@ -0,0 +1,137 @@
+// Copyright (c) 2018 IBM
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+
+package virtcontainers
+
+import (
+	"encoding/hex"
+	"os"
+
+	govmmQemu "github.com/intel/govmm/qemu"
+	"github.com/kata-containers/runtime/virtcontainers/device/drivers"
+	"github.com/kata-containers/runtime/virtcontainers/utils"
+)
+
+type qemuPPC64le struct {
+	// inherit from qemuArchBase, overwrite methods if needed
+	qemuArchBase
+}
+
+const defaultQemuPath = "/usr/bin/qemu-system-ppc64le"
+
+const defaultQemuMachineType = QemuPseries
+
+const defaultQemuMachineOptions = "accel=kvm,usb=off"
+
+const defaultPCBridgeBus = "pci.0"
+
+var qemuPaths = map[string]string{
+	QemuPseries: defaultQemuPath,
+}
+
+var kernelRootParams = []Param{}
+
+var kernelParams = []Param{
+	{"tsc", "reliable"},
+	{"no_timer_check", ""},
+	{"rcupdate.rcu_expedited", "1"},
+	{"noreplace-smp", ""},
+	{"reboot", "k"},
+	{"console", "hvc0"},
+	{"console", "hvc1"},
+	{"iommu", "off"},
+	{"cryptomgr.notests", ""},
+	{"net.ifnames", "0"},
+	{"pci", "lastbus=0"},
+}
+
+var supportedQemuMachines = []govmmQemu.Machine{
+	{
+		Type:    QemuPseries,
+		Options: defaultQemuMachineOptions,
+	},
+}
+
+// returns the maximum number of vCPUs supported
+func MaxQemuVCPUs() uint32 {
+	return uint32(128)
+}
+
+func newQemuArch(config HypervisorConfig) qemuArch {
+	machineType := config.HypervisorMachineType
+	if machineType == "" {
+		machineType = defaultQemuMachineType
+	}
+
+	q := &qemuPPC64le{
+		qemuArchBase{
+			machineType:           machineType,
+			qemuPaths:             qemuPaths,
+			supportedQemuMachines: supportedQemuMachines,
+			kernelParamsNonDebug:  kernelParamsNonDebug,
+			kernelParamsDebug:     kernelParamsDebug,
+			kernelParams:          kernelParams,
+		},
+	}
+
+	q.handleImagePath(config)
+	return q
+}
+
+func (q *qemuPPC64le) capabilities() capabilities {
+	var caps capabilities
+
+	// pseries machine type supports hotplugging drives
+	if q.machineType == QemuPseries {
+		caps.setBlockDeviceHotplugSupport()
+	}
+
+	return caps
+}
+
+func (q *qemuPPC64le) bridges(number uint32) []Bridge {
+	return genericBridges(number, q.machineType)
+}
+
+func (q *qemuPPC64le) cpuModel() string {
+	cpuModel := defaultCPUModel
+	if q.nestedRun {
+		cpuModel += ",pmu=off"
+	}
+	return cpuModel
+}
+
+func (q *qemuPPC64le) memoryTopology(memoryMb, hostMemoryMb uint64) govmmQemu.Memory {
+
+	// align hostMemoryMb to 256 MB multiples
+	hostMemoryMb -= (hostMemoryMb % 256)
+	return genericMemoryTopology(memoryMb, hostMemoryMb)
+}
+
+func (q *qemuPPC64le) appendImage(devices []govmmQemu.Device, path string) ([]govmmQemu.Device, error) {
+	if _, err := os.Stat(path); os.IsNotExist(err) {
+		return nil, err
+	}
+
+	randBytes, err := utils.GenerateRandomBytes(8)
+	if err != nil {
+		return nil, err
+	}
+
+	id := utils.MakeNameID("image", hex.EncodeToString(randBytes), maxDevIDSize)
+
+	drive := drivers.Drive{
+		File:   path,
+		Format: "raw",
+		ID:     id,
+	}
+
+	return q.appendBlockDevice(devices, drive), nil
+}
+
+// appendBridges appends to devices the given bridges
+func (q *qemuPPC64le) appendBridges(devices []govmmQemu.Device, bridges []Bridge) []govmmQemu.Device {
+	return genericAppendBridges(devices, bridges, q.machineType)
+}