Merge pull request #3615 from sameo/topic/hypervisor

Make the hypervisor framework not Linux specific

src/runtime/pkg/govmm/vmm_amd64.go

@@ -0,0 +1,12 @@
+//
+// Copyright (c) 2018 Intel Corporation
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+
+package govmm
+
+// MaxVCPUs returns the maximum number of vCPUs supported
+func MaxVCPUs() uint32 {
+	return uint32(240)
+}

src/runtime/pkg/govmm/vmm_arm64.go

@@ -0,0 +1,25 @@
+//
+// Copyright (c) 2018 Intel Corporation
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+
+package govmm
+
+//In qemu, maximum number of vCPUs depends on the GIC version, or on how
+//many redistributors we can fit into the memory map.
+//related codes are under github.com/qemu/qemu/hw/arm/virt.c(Line 135 and 1306 in stable-2.11)
+//for now, qemu only supports v2 and v3, we treat v4 as v3 based on
+//backward compatibility.
+var gicList = map[uint32]uint32{
+	uint32(2): uint32(8),
+	uint32(3): uint32(123),
+	uint32(4): uint32(123),
+}
+
+var defaultGICVersion = uint32(3)
+
+// MaxVCPUs returns the maximum number of vCPUs supported
+func MaxVCPUs() uint32 {
+	return gicList[defaultGICVersion]
+}

src/runtime/pkg/govmm/vmm_ppc64le.go

@@ -0,0 +1,12 @@
+//
+// Copyright (c) 2018 IBM
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+
+package qemu
+
+// MaxVCPUs returns the maximum number of vCPUs supported
+func MaxVCPUs() uint32 {
+	return uint32(128)
+}

src/runtime/pkg/govmm/vmm_s390x.go

@@ -0,0 +1,15 @@
+//
+// Copyright (c) 2018 IBM
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+
+package govmm
+
+// MaxVCPUs returns the maximum number of vCPUs supported
+func MaxVCPUs() uint32 {
+	// Max number of virtual Cpu defined in qemu. See
+ 	// https://github.com/qemu/qemu/blob/80422b00196a7af4c6efb628fae0ad8b644e98af/target/s390x/cpu.h#L55
+ 	// #define S390_MAX_CPUS 248
+ 	return uint32(248)
+}

src/runtime/pkg/katautils/config.go

@@ -15,6 +15,7 @@ import (
 	"strings"
 
 	"github.com/BurntSushi/toml"
+	"github.com/kata-containers/kata-containers/src/runtime/pkg/govmm"
 	govmmQemu "github.com/kata-containers/kata-containers/src/runtime/pkg/govmm/qemu"
 	"github.com/kata-containers/kata-containers/src/runtime/pkg/katautils/katatrace"
 	"github.com/kata-containers/kata-containers/src/runtime/pkg/oci"
@@ -343,7 +344,7 @@ func (h hypervisor) defaultVCPUs() uint32 {
 
 func (h hypervisor) defaultMaxVCPUs() uint32 {
 	numcpus := uint32(goruntime.NumCPU())
-	maxvcpus := vc.MaxQemuVCPUs()
+	maxvcpus := govmm.MaxVCPUs()
 	reqVCPUs := h.DefaultMaxVCPUs
 
 	//don't exceed the number of physical CPUs. If a default is not provided, use the

src/runtime/pkg/katautils/config_test.go

@@ -17,6 +17,7 @@ import (
 	"syscall"
 	"testing"
 
+	"github.com/kata-containers/kata-containers/src/runtime/pkg/govmm"
 	ktu "github.com/kata-containers/kata-containers/src/runtime/pkg/katatestutils"
 	"github.com/kata-containers/kata-containers/src/runtime/pkg/oci"
 	vc "github.com/kata-containers/kata-containers/src/runtime/virtcontainers"
@@ -919,7 +920,7 @@ func TestHypervisorDefaults(t *testing.T) {
 	h.DefaultMaxVCPUs = numCPUs + 1
 	assert.Equal(h.defaultMaxVCPUs(), numCPUs, "default max vCPU number is wrong")
 
-	maxvcpus := vc.MaxQemuVCPUs()
+	maxvcpus := govmm.MaxVCPUs()
 	h.DefaultMaxVCPUs = maxvcpus + 1
 	assert.Equal(h.defaultMaxVCPUs(), numCPUs, "default max vCPU number is wrong")
 

src/runtime/pkg/oci/utils.go

@@ -23,6 +23,7 @@ import (
 	"github.com/sirupsen/logrus"
 	"k8s.io/apimachinery/pkg/api/resource"
 
+	"github.com/kata-containers/kata-containers/src/runtime/pkg/govmm"
 	vc "github.com/kata-containers/kata-containers/src/runtime/virtcontainers"
 
 	"github.com/kata-containers/kata-containers/src/runtime/virtcontainers/device/config"
@@ -637,8 +638,8 @@ func addHypervisorCPUOverrides(ocispec specs.Spec, sbConfig *vc.SandboxConfig) e
 			return fmt.Errorf("Number of cpus %d in annotation default_maxvcpus is greater than the number of CPUs %d on the system", max, numCPUs)
 		}
 
-		if sbConfig.HypervisorType == vc.QemuHypervisor && max > vc.MaxQemuVCPUs() {
-			return fmt.Errorf("Number of cpus %d in annotation default_maxvcpus is greater than max no of CPUs %d supported for qemu", max, vc.MaxQemuVCPUs())
+		if sbConfig.HypervisorType == vc.QemuHypervisor && max > govmm.MaxVCPUs() {
+			return fmt.Errorf("Number of cpus %d in annotation default_maxvcpus is greater than max no of CPUs %d supported for qemu", max, govmm.MaxVCPUs())
 		}
 		sbConfig.HypervisorConfig.DefaultMaxVCPUs = max
 		return nil

src/runtime/virtcontainers/acrn.go

@@ -1,3 +1,6 @@
+//go:build linux
+// +build linux
+//
 // Copyright (c) 2019 Intel Corporation
 //
 // SPDX-License-Identifier: Apache-2.0

src/runtime/virtcontainers/acrn_arch_base.go

@@ -1,3 +1,6 @@
+//go:build linux
+// +build linux
+//
 // Copyright (c) 2019 Intel Corporation
 //
 // SPDX-License-Identifier: Apache-2.0

src/runtime/virtcontainers/acrn_test.go

@@ -1,3 +1,6 @@
+//go:build linux
+// +build linux
+//
 // Copyright (c) 2019 Intel Corporation
 //
 // SPDX-License-Identifier: Apache-2.0

src/runtime/virtcontainers/clh.go

@@ -1,3 +1,6 @@
+//go:build linux
+// +build linux
+//
 // Copyright (c) 2019 Ericsson Eurolab Deutschland GmbH
 //
 // SPDX-License-Identifier: Apache-2.0

src/runtime/virtcontainers/clh_test.go

@@ -1,3 +1,6 @@
+//go:build linux
+// +build linux
+//
 // Copyright (c) 2019 Ericsson Eurolab Deutschland G.m.b.H.
 //
 // SPDX-License-Identifier: Apache-2.0

src/runtime/virtcontainers/fc.go

@@ -1,3 +1,6 @@
+//go:build linux
+// +build linux
+//
 // Copyright (c) 2018 Intel Corporation
 //
 // SPDX-License-Identifier: Apache-2.0

src/runtime/virtcontainers/fc_metrics.go

@@ -1,3 +1,6 @@
+//go:build linux
+// +build linux
+//
 // Copyright (c) 2020 Ant Group
 //
 // SPDX-License-Identifier: Apache-2.0

src/runtime/virtcontainers/fc_test.go

@@ -1,3 +1,6 @@
+//go:build linux
+// +build linux
+//
 // Copyright (c) 2019 Intel Corporation
 //
 // SPDX-License-Identifier: Apache-2.0

src/runtime/virtcontainers/hypervisor.go

@@ -14,10 +14,12 @@ import (
 	"strconv"
 	"strings"
 
+	"github.com/pkg/errors"
+
+	"github.com/kata-containers/kata-containers/src/runtime/pkg/govmm"
 	hv "github.com/kata-containers/kata-containers/src/runtime/pkg/hypervisors"
 	"github.com/kata-containers/kata-containers/src/runtime/virtcontainers/device/config"
 	"github.com/kata-containers/kata-containers/src/runtime/virtcontainers/types"
-	"github.com/kata-containers/kata-containers/src/runtime/virtcontainers/utils"
 
 	"github.com/sirupsen/logrus"
 )
@@ -69,14 +71,17 @@ const (
 
 	// MinHypervisorMemory is the minimum memory required for a VM.
 	MinHypervisorMemory = 256
+
+	defaultMsize9p = 8192
 )
 
 var (
-	hvLogger = logrus.WithField("source", "virtcontainers/hypervisor")
+	hvLogger                   = logrus.WithField("source", "virtcontainers/hypervisor")
+	noGuestMemHotplugErr error = errors.New("guest memory hotplug not supported")
 )
 
 // In some architectures the maximum number of vCPUs depends on the number of physical cores.
-var defaultMaxQemuVCPUs = MaxQemuVCPUs()
+var defaultMaxVCPUs = govmm.MaxVCPUs()
 
 // agnostic list of kernel root parameters for NVDIMM
 var commonNvdimmKernelRootParams = []Param{ //nolint: unused, deadcode, varcheck
@@ -192,25 +197,6 @@ func (hType *HypervisorType) String() string {
 	}
 }
 
-// NewHypervisor returns an hypervisor from a hypervisor type.
-func NewHypervisor(hType HypervisorType) (Hypervisor, error) {
-
-	switch hType {
-	case QemuHypervisor:
-		return &qemu{}, nil
-	case FirecrackerHypervisor:
-		return &firecracker{}, nil
-	case AcrnHypervisor:
-		return &Acrn{}, nil
-	case ClhHypervisor:
-		return &cloudHypervisor{}, nil
-	case MockHypervisor:
-		return &mockHypervisor{}, nil
-	default:
-		return nil, fmt.Errorf("Unknown hypervisor type %s", hType)
-	}
-}
-
 // GetHypervisorSocketTemplate returns the full "template" path to the
 // hypervisor socket. If the specified hypervisor doesn't use a socket,
 // an empty string is returned.
@@ -574,8 +560,8 @@ func (conf *HypervisorConfig) Valid() error {
 		conf.BlockDeviceDriver = config.VirtioBlockCCW
 	}
 
-	if conf.DefaultMaxVCPUs == 0 || conf.DefaultMaxVCPUs > defaultMaxQemuVCPUs {
-		conf.DefaultMaxVCPUs = defaultMaxQemuVCPUs
+	if conf.DefaultMaxVCPUs == 0 || conf.DefaultMaxVCPUs > defaultMaxVCPUs {
+		conf.DefaultMaxVCPUs = defaultMaxVCPUs
 	}
 
 	if conf.Msize9p == 0 && conf.SharedFS != config.VirtioFS {
@@ -894,17 +880,55 @@ func GetHypervisorPid(h Hypervisor) int {
 	return pids[0]
 }
 
-func generateVMSocket(id string, vmStogarePath string) (interface{}, error) {
-	vhostFd, contextID, err := utils.FindContextID()
-	if err != nil {
-		return nil, err
-	}
+// Kind of guest protection
+type guestProtection uint8
 
-	return types.VSock{
-		VhostFd:   vhostFd,
-		ContextID: contextID,
-		Port:      uint32(vSockPort),
-	}, nil
+const (
+	noneProtection guestProtection = iota
+
+	//Intel Trust Domain Extensions
+	//https://software.intel.com/content/www/us/en/develop/articles/intel-trust-domain-extensions.html
+	// Exclude from lint checking for it won't be used on arm64 code
+	tdxProtection
+
+	// AMD Secure Encrypted Virtualization
+	// https://developer.amd.com/sev/
+	// Exclude from lint checking for it won't be used on arm64 code
+	sevProtection
+
+	// IBM POWER 9 Protected Execution Facility
+	// https://www.kernel.org/doc/html/latest/powerpc/ultravisor.html
+	// Exclude from lint checking for it won't be used on arm64 code
+	pefProtection
+
+	// IBM Secure Execution (IBM Z & LinuxONE)
+	// https://www.kernel.org/doc/html/latest/virt/kvm/s390-pv.html
+	// Exclude from lint checking for it won't be used on arm64 code
+	seProtection
+)
+
+var guestProtectionStr = [...]string{
+	noneProtection: "none",
+	pefProtection:  "pef",
+	seProtection:   "se",
+	sevProtection:  "sev",
+	tdxProtection:  "tdx",
+}
+
+func (gp guestProtection) String() string {
+	return guestProtectionStr[gp]
+}
+
+func genericAvailableGuestProtections() (protections []string) {
+	return
+}
+
+func AvailableGuestProtections() (protections []string) {
+	gp, err := availableGuestProtection()
+	if err != nil || gp == noneProtection {
+		return genericAvailableGuestProtections()
+	}
+	return []string{gp.String()}
 }
 
 // hypervisor is the virtcontainers hypervisor interface.

src/runtime/virtcontainers/hypervisor_linux.go

@@ -0,0 +1,45 @@
+// Copyright (c) 2021 Apple Inc.
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+
+package virtcontainers
+
+import (
+	"fmt"
+
+	"github.com/kata-containers/kata-containers/src/runtime/virtcontainers/types"
+	"github.com/kata-containers/kata-containers/src/runtime/virtcontainers/utils"
+)
+
+func generateVMSocket(id string, vmStogarePath string) (interface{}, error) {
+	vhostFd, contextID, err := utils.FindContextID()
+	if err != nil {
+		return nil, err
+	}
+
+	return types.VSock{
+		VhostFd:   vhostFd,
+		ContextID: contextID,
+		Port:      uint32(vSockPort),
+	}, nil
+}
+
+// NewHypervisor returns an hypervisor from a hypervisor type.
+func NewHypervisor(hType HypervisorType) (Hypervisor, error) {
+
+	switch hType {
+	case QemuHypervisor:
+		return &qemu{}, nil
+	case FirecrackerHypervisor:
+		return &firecracker{}, nil
+	case AcrnHypervisor:
+		return &Acrn{}, nil
+	case ClhHypervisor:
+		return &cloudHypervisor{}, nil
+	case MockHypervisor:
+		return &mockHypervisor{}, nil
+	default:
+		return nil, fmt.Errorf("Unknown hypervisor type %s", hType)
+	}
+}

src/runtime/virtcontainers/hypervisor_linux_amd64.go

@@ -7,6 +7,14 @@ package virtcontainers
 
 import "os"
 
+const (
+	tdxSysFirmwareDir = "/sys/firmware/tdx_seam/"
+
+	tdxCPUFlag = "tdx"
+
+	sevKvmParameterPath = "/sys/module/kvm_amd/parameters/sev"
+)
+
 // Implementation of this function is architecture specific
 func availableGuestProtection() (guestProtection, error) {
 	flags, err := CPUFlags(procCPUInfo)

src/runtime/virtcontainers/hypervisor_linux_arm64.go

@@ -4,7 +4,7 @@
 
 package virtcontainers
 
-//Returns pefProtection if the firmware directory exists
+// Guest protection is not supported on ARM64.
 func availableGuestProtection() (guestProtection, error) {
 	return noneProtection, nil
 }

src/runtime/virtcontainers/hypervisor_test.go

@@ -185,7 +185,7 @@ func TestHypervisorConfigDefaults(t *testing.T) {
 		MemorySize:        defaultMemSzMiB,
 		DefaultBridges:    defaultBridges,
 		BlockDeviceDriver: defaultBlockDriver,
-		DefaultMaxVCPUs:   defaultMaxQemuVCPUs,
+		DefaultMaxVCPUs:   defaultMaxVCPUs,
 		Msize9p:           defaultMsize9p,
 	}
 

src/runtime/virtcontainers/qemu.go

@@ -1,3 +1,6 @@
+//go:build linux
+// +build linux
+//
 // Copyright (c) 2016 Intel Corporation
 //
 // SPDX-License-Identifier: Apache-2.0
@@ -128,8 +131,6 @@ const (
 	qemuStopSandboxTimeoutSecs = 15
 )
 
-var noGuestMemHotplugErr error = errors.New("guest memory hotplug not supported")
-
 // agnostic list of kernel parameters
 var defaultKernelParameters = []Param{
 	{"panic", "1"},

src/runtime/virtcontainers/qemu_amd64.go

@@ -1,3 +1,6 @@
+//go:build linux
+// +build linux
+//
 // Copyright (c) 2018 Intel Corporation
 //
 // SPDX-License-Identifier: Apache-2.0
@@ -36,12 +39,6 @@ const (
 	defaultQemuMachineOptions = "accel=kvm,kernel_irqchip=on"
 
 	qmpMigrationWaitTimeout = 5 * time.Second
-
-	tdxSysFirmwareDir = "/sys/firmware/tdx_seam/"
-
-	tdxCPUFlag = "tdx"
-
-	sevKvmParameterPath = "/sys/module/kvm_amd/parameters/sev"
 )
 
 var qemuPaths = map[string]string{
@@ -81,11 +78,6 @@ var supportedQemuMachines = []govmmQemu.Machine{
 	},
 }
 
-// MaxQemuVCPUs returns the maximum number of vCPUs supported
-func MaxQemuVCPUs() uint32 {
-	return uint32(240)
-}
-
 func newQemuArch(config HypervisorConfig) (qemuArch, error) {
 	machineType := config.HypervisorMachineType
 	if machineType == "" {

src/runtime/virtcontainers/qemu_amd64_test.go

@@ -1,3 +1,6 @@
+//go:build linux
+// +build linux
+//
 // Copyright (c) 2018 Intel Corporation
 //
 // SPDX-License-Identifier: Apache-2.0

src/runtime/virtcontainers/qemu_arch_base.go

@@ -1,3 +1,6 @@
+//go:build linux
+// +build linux
+//
 // Copyright (c) 2018 Intel Corporation
 //
 // SPDX-License-Identifier: Apache-2.0
@@ -150,57 +153,6 @@ type qemuArch interface {
 	appendProtectionDevice(devices []govmmQemu.Device, firmware, firmwareVolume string) ([]govmmQemu.Device, string, error)
 }
 
-// Kind of guest protection
-type guestProtection uint8
-
-const (
-	noneProtection guestProtection = iota
-
-	//Intel Trust Domain Extensions
-	//https://software.intel.com/content/www/us/en/develop/articles/intel-trust-domain-extensions.html
-	// Exclude from lint checking for it won't be used on arm64 code
-	tdxProtection
-
-	// AMD Secure Encrypted Virtualization
-	// https://developer.amd.com/sev/
-	// Exclude from lint checking for it won't be used on arm64 code
-	sevProtection
-
-	// IBM POWER 9 Protected Execution Facility
-	// https://www.kernel.org/doc/html/latest/powerpc/ultravisor.html
-	// Exclude from lint checking for it won't be used on arm64 code
-	pefProtection
-
-	// IBM Secure Execution (IBM Z & LinuxONE)
-	// https://www.kernel.org/doc/html/latest/virt/kvm/s390-pv.html
-	// Exclude from lint checking for it won't be used on arm64 code
-	seProtection
-)
-
-var guestProtectionStr = [...]string{
-	noneProtection: "none",
-	pefProtection:  "pef",
-	seProtection:   "se",
-	sevProtection:  "sev",
-	tdxProtection:  "tdx",
-}
-
-func (gp guestProtection) String() string {
-	return guestProtectionStr[gp]
-}
-
-func genericAvailableGuestProtections() (protections []string) {
-	return
-}
-
-func AvailableGuestProtections() (protections []string) {
-	gp, err := availableGuestProtection()
-	if err != nil || gp == noneProtection {
-		return genericAvailableGuestProtections()
-	}
-	return []string{gp.String()}
-}
-
 type qemuArchBase struct {
 	qemuExePath          string
 	qemuMachine          govmmQemu.Machine
@@ -226,7 +178,6 @@ const (
 	defaultBridgeBus          = "pcie.0"
 	defaultPCBridgeBus        = "pci.0"
 	maxDevIDSize              = 31
-	defaultMsize9p            = 8192
 	pcieRootPortPrefix        = "rp"
 )
 

src/runtime/virtcontainers/qemu_arch_base_test.go

@@ -1,3 +1,6 @@
+//go:build linux
+// +build linux
+//
 // Copyright (c) 2018 Intel Corporation
 //
 // SPDX-License-Identifier: Apache-2.0
@@ -173,13 +176,13 @@ func TestQemuArchBaseCPUTopology(t *testing.T) {
 
 	expectedSMP := govmmQemu.SMP{
 		CPUs:    vcpus,
-		Sockets: defaultMaxQemuVCPUs,
+		Sockets: defaultMaxVCPUs,
 		Cores:   defaultCores,
 		Threads: defaultThreads,
-		MaxCPUs: defaultMaxQemuVCPUs,
+		MaxCPUs: defaultMaxVCPUs,
 	}
 
-	smp := qemuArchBase.cpuTopology(vcpus, defaultMaxQemuVCPUs)
+	smp := qemuArchBase.cpuTopology(vcpus, defaultMaxVCPUs)
 	assert.Equal(expectedSMP, smp)
 }
 

src/runtime/virtcontainers/qemu_arm64.go

@@ -1,3 +1,6 @@
+//go:build linux
+// +build linux
+//
 // Copyright (c) 2018 Intel Corporation
 //
 // SPDX-License-Identifier: Apache-2.0
@@ -29,8 +32,6 @@ const qmpMigrationWaitTimeout = 10 * time.Second
 
 const defaultQemuMachineOptions = "usb=off,accel=kvm,gic-version=host"
 
-var defaultGICVersion = uint32(3)
-
 var kernelParams = []Param{
 	{"console", "hvc0"},
 	{"console", "hvc1"},
@@ -42,22 +43,6 @@ var supportedQemuMachine = govmmQemu.Machine{
 	Options: defaultQemuMachineOptions,
 }
 
-//In qemu, maximum number of vCPUs depends on the GIC version, or on how
-//many redistributors we can fit into the memory map.
-//related codes are under github.com/qemu/qemu/hw/arm/virt.c(Line 135 and 1306 in stable-2.11)
-//for now, qemu only supports v2 and v3, we treat v4 as v3 based on
-//backward compatibility.
-var gicList = map[uint32]uint32{
-	uint32(2): uint32(8),
-	uint32(3): uint32(123),
-	uint32(4): uint32(123),
-}
-
-// MaxQemuVCPUs returns the maximum number of vCPUs supported
-func MaxQemuVCPUs() uint32 {
-	return gicList[defaultGICVersion]
-}
-
 func newQemuArch(config HypervisorConfig) (qemuArch, error) {
 	machineType := config.HypervisorMachineType
 	if machineType == "" {

src/runtime/virtcontainers/qemu_arm64_test.go

@@ -1,3 +1,6 @@
+//go:build linux
+// +build linux
+//
 // Copyright (c) 2018 IBM
 //
 // SPDX-License-Identifier: Apache-2.0
@@ -11,6 +14,7 @@ import (
 	"os"
 	"testing"
 
+	"github.com/kata-containers/kata-containers/src/runtime/pkg/govmm"
 	govmmQemu "github.com/kata-containers/kata-containers/src/runtime/pkg/govmm/qemu"
 	"github.com/stretchr/testify/assert"
 )
@@ -54,10 +58,10 @@ func TestQemuArm64MemoryTopology(t *testing.T) {
 	assert.Equal(expectedMemory, m)
 }
 
-func TestMaxQemuVCPUs(t *testing.T) {
+func TestMaxVCPUs(t *testing.T) {
 	assert := assert.New(t)
 
-	vCPUs := MaxQemuVCPUs()
+	vCPUs := govmm.MaxVCPUs()
 	assert.Equal(uint32(123), vCPUs)
 }
 

src/runtime/virtcontainers/qemu_ppc64le.go

@@ -1,3 +1,6 @@
+//go:build linux
+// +build linux
+//
 // Copyright (c) 2018 IBM
 //
 // SPDX-License-Identifier: Apache-2.0
@@ -54,11 +57,6 @@ func (q *qemuPPC64le) Logger() *logrus.Entry {
 	return hvLogger.WithField("subsystem", "qemuPPC64le")
 }
 
-// MaxQemuVCPUs returns the maximum number of vCPUs supported
-func MaxQemuVCPUs() uint32 {
-	return uint32(128)
-}
-
 func newQemuArch(config HypervisorConfig) (qemuArch, error) {
 	machineType := config.HypervisorMachineType
 	if machineType == "" {

src/runtime/virtcontainers/qemu_ppc64le_test.go

@@ -1,3 +1,6 @@
+//go:build linux
+// +build linux
+//
 // Copyright (c) 2018 IBM
 //
 // SPDX-License-Identifier: Apache-2.0

src/runtime/virtcontainers/qemu_s390x.go

@@ -1,3 +1,6 @@
+//go:build linux
+// +build linux
+//
 // Copyright (c) 2018 IBM
 //
 // SPDX-License-Identifier: Apache-2.0
@@ -47,14 +50,6 @@ var supportedQemuMachine = govmmQemu.Machine{
 	Options: defaultQemuMachineOptions,
 }
 
-// MaxQemuVCPUs returns the maximum number of vCPUs supported
-func MaxQemuVCPUs() uint32 {
-	// Max number of virtual Cpu defined in qemu. See
-	// https://github.com/qemu/qemu/blob/80422b00196a7af4c6efb628fae0ad8b644e98af/target/s390x/cpu.h#L55
-	// #define S390_MAX_CPUS 248
-	return uint32(248)
-}
-
 func newQemuArch(config HypervisorConfig) (qemuArch, error) {
 	machineType := config.HypervisorMachineType
 	if machineType == "" {

src/runtime/virtcontainers/qemu_s390x_test.go

@@ -1,3 +1,6 @@
+//go:build linux
+// +build linux
+//
 // Copyright (c) 2018 IBM
 //
 // SPDX-License-Identifier: Apache-2.0

src/runtime/virtcontainers/qemu_test.go

@@ -1,3 +1,6 @@
+//go:build linux
+// +build linux
+//
 // Copyright (c) 2016 Intel Corporation
 //
 // SPDX-License-Identifier: Apache-2.0
@@ -12,6 +15,7 @@ import (
 	"path/filepath"
 	"testing"
 
+	"github.com/kata-containers/kata-containers/src/runtime/pkg/govmm"
 	govmmQemu "github.com/kata-containers/kata-containers/src/runtime/pkg/govmm/qemu"
 	"github.com/kata-containers/kata-containers/src/runtime/virtcontainers/device/config"
 	"github.com/kata-containers/kata-containers/src/runtime/virtcontainers/persist"
@@ -30,7 +34,7 @@ func newQemuConfig() HypervisorConfig {
 		MemorySize:        defaultMemSzMiB,
 		DefaultBridges:    defaultBridges,
 		BlockDeviceDriver: defaultBlockDriver,
-		DefaultMaxVCPUs:   defaultMaxQemuVCPUs,
+		DefaultMaxVCPUs:   defaultMaxVCPUs,
 		Msize9p:           defaultMsize9p,
 	}
 }
@@ -54,7 +58,7 @@ func testQemuKernelParameters(t *testing.T, kernelParams []Param, expected strin
 }
 
 func TestQemuKernelParameters(t *testing.T) {
-	expectedOut := fmt.Sprintf("panic=1 nr_cpus=%d foo=foo bar=bar", MaxQemuVCPUs())
+	expectedOut := fmt.Sprintf("panic=1 nr_cpus=%d foo=foo bar=bar", govmm.MaxVCPUs())
 	params := []Param{
 		{
 			Key:   "foo",