Add qemu_accelerator option

sources/inputs.pkr.hcl

@@ -62,6 +62,11 @@ variable "vagrant_cloud_token" {
 	default = env("VAGRANT_CLOUD_TOKEN")
 }
 
+variable "qemu_accelerator" {
+	type = string
+	default = "kvm"
+}
+
 locals {
 	name = "${var.distro}-${var.version}-${var.arch}"
 	build = formatdate("YYYYMMDDhh", timestamp())

sources/qemu.pkr.hcl

@@ -12,7 +12,7 @@ source "qemu" "x86_64" {
 	boot_command = var.boot_command
 	http_directory = "http"
 	ssh_handshake_attempts = var.ssh_handshake_attempts
-	accelerator = "kvm"
+	accelerator = var.qemu_accelerator
 	cpus = 2
 	memory = 2048
 	qemuargs = [["-serial", "stdio"]]