virtcontainers: hypervisor: Add capability regarding multiqueue support

Each hypervisor is different and supports different options regarding
the network interface it creates. In particular, the multiqueue option
is not supported by Firecracker and should not be assumed by default.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>

virtcontainers/capabilities.go

@@ -8,6 +8,7 @@ package virtcontainers
 const (
 	blockDeviceSupport = 1 << iota
 	blockDeviceHotplugSupport
+	multiQueueSupport
 )
 
 type capabilities struct {
@@ -35,3 +36,14 @@ func (caps *capabilities) isBlockDeviceHotplugSupported() bool {
 func (caps *capabilities) setBlockDeviceHotplugSupport() {
 	caps.flags |= blockDeviceHotplugSupport
 }
+
+func (caps *capabilities) isMultiQueueSupported() bool {
+	if caps.flags&multiQueueSupport != 0 {
+		return true
+	}
+	return false
+}
+
+func (caps *capabilities) setMultiQueueSupport() {
+	caps.flags |= multiQueueSupport
+}

virtcontainers/qemu_amd64.go

@@ -108,6 +108,8 @@ func (q *qemuAmd64) capabilities() capabilities {
 		caps.setBlockDeviceHotplugSupport()
 	}
 
+	caps.setMultiQueueSupport()
+
 	return caps
 }
 

virtcontainers/qemu_arch_base.go

@@ -237,6 +237,7 @@ func (q *qemuArchBase) kernelParameters(debug bool) []Param {
 func (q *qemuArchBase) capabilities() capabilities {
 	var caps capabilities
 	caps.setBlockDeviceHotplugSupport()
+	caps.setMultiQueueSupport()
 	return caps
 }
 

virtcontainers/qemu_ppc64le.go

@@ -94,6 +94,8 @@ func (q *qemuPPC64le) capabilities() capabilities {
 		caps.setBlockDeviceHotplugSupport()
 	}
 
+	caps.setMultiQueueSupport()
+
 	return caps
 }