Add interface for apple hypervisor

The new apple silicon processesors (m1/m2) are capable of using a performent apple
hypervisor (included in macos).  Our "virtual providers" for podman
machine are part of an interface design.  This PR provides an
implementation of the interface to begin the work for supporting the
apple hypervisor.  It is basically only a skeletal PR.

The actual code for using the hypervisor and launching a machine will
come as several new PRs following the inclusion of this one.

There will likely be code reuse between the applehv and qemu code; but
none of that code is being moved at this time.  It will be moved "on
demand" during development.

[NO NEW TESTS NEEDED]

Signed-off-by: Brent Baude <bbaude@redhat.com>

3 files changed, 72 insertions, 1 deletions

diff --git a/pkg/machine/applehv/machine.go b/pkg/machine/applehv/machine.go
new file mode 100644
index 000000000..35a8e9851
--- /dev/null
+++ b/pkg/machine/applehv/machine.go
@@ -0,0 +1,70 @@
+//go:build arm64 && !windows && !linux
+// +build darwin
+
+package applehv
+
+import (
+	"time"
+
+	"github.com/containers/podman/v4/pkg/machine"
+)
+
+type Provider struct{}
+
+var (
+	hvProvider = &Provider{}
+	// vmtype refers to qemu (vs libvirt, krun, etc).
+	vmtype = "apple"
+)
+
+func GetVirtualizationProvider() machine.Provider {
+	return hvProvider
+}
+
+const (
+	// Some of this will need to change when we are closer to having
+	// working code.
+	VolumeTypeVirtfs     = "virtfs"
+	MountType9p          = "9p"
+	dockerSock           = "/var/run/docker.sock"
+	dockerConnectTimeout = 5 * time.Second
+	apiUpTimeout         = 20 * time.Second
+)
+
+type apiForwardingState int
+
+const (
+	noForwarding apiForwardingState = iota
+	claimUnsupported
+	notInstalled
+	machineLocal
+	dockerGlobal
+)
+
+func (p *Provider) NewMachine(opts machine.InitOptions) (machine.VM, error) {
+	return nil, machine.ErrNotImplemented
+}
+
+func (p *Provider) LoadVMByName(name string) (machine.VM, error) {
+	return nil, machine.ErrNotImplemented
+}
+
+func (p *Provider) List(opts machine.ListOptions) ([]*machine.ListResponse, error) {
+	return nil, machine.ErrNotImplemented
+}
+
+func (p *Provider) IsValidVMName(name string) (bool, error) {
+	return false, machine.ErrNotImplemented
+}
+
+func (p *Provider) CheckExclusiveActiveVM() (bool, string, error) {
+	return false, "", machine.ErrNotImplemented
+}
+
+func (p *Provider) RemoveAndCleanMachines() error {
+	return machine.ErrNotImplemented
+}
+
+func (p *Provider) VMType() string {
+	return vmtype
+}
diff --git a/pkg/machine/config.go b/pkg/machine/config.go
index 253601dad..5162006db 100644
--- a/pkg/machine/config.go
+++ b/pkg/machine/config.go
@@ -66,6 +66,7 @@ var (
 	ErrVMAlreadyExists                           = errors.New("VM already exists")
 	ErrVMAlreadyRunning                          = errors.New("VM already running or starting")
 	ErrMultipleActiveVM                          = errors.New("only one VM can be active at a time")
+	ErrNotImplemented                            = errors.New("functionality not implemented")
 	ForwarderBinaryName                          = "gvproxy"
 )
 
diff --git a/pkg/machine/qemu/machine.go b/pkg/machine/qemu/machine.go
index 7974c261e..213f7ce5d 100644
--- a/pkg/machine/qemu/machine.go
+++ b/pkg/machine/qemu/machine.go
@@ -42,7 +42,7 @@ var (
 	vmtype = "qemu"
 )
 
-func GetQemuProvider() machine.Provider {
+func GetVirtualizationProvider() machine.Provider {
 	return qemuProvider
 }