software/kvm: Fix native aio flags

Set cache.direct=on when using native aio (needed by qemu)

/reviewed-on nexedi/slapos!399

software/kvm/software.cfg

@@ -186,7 +186,7 @@ ignore-existing = true
 url = ${:_profile_base_location_}/template/template-kvm-run.in
 mode = 644
 filename = template-kvm-run.in
-md5sum = 0a076a9338ea0c25fa4e7c9369473d8a
+md5sum = 8d681430f03ae4d35fc64b1625653a22
 download-only = true
 on-update = true
 

software/kvm/template/template-kvm-run.in

@@ -238,6 +238,11 @@ if disk_storage_dict:
         print('Data folder %s was not used to create external disk %r' % (index +1))
       index += 1
 
+additional_disk_options = ''
+
+if disk_aio == 'native':
+  additional_disk_options += ',cache.direct=on'
+
 
 # Generate network parameters
 # XXX: use_tap should be a boolean
@@ -293,7 +298,8 @@ else:
 
 kvm_argument_list = [qemu_path,
   '-enable-kvm', '-smp', smp, '-name', vm_name, '-m', ram, '-vga', 'std',
-  '-drive', 'file=%s,if=%s,cache=%s,aio=%s' % (disk_path, disk_type, disk_cache, disk_aio),
+  '-drive', 'file=%s,if=%s,cache=%s,aio=%s%s' % (disk_path, disk_type, disk_cache,
+                                                 disk_aio, additional_disk_options),
   '-vnc', '%s:1,ipv4,password' % listen_ip,
   '-boot', 'order=cd,menu=on',
   '-qmp', 'unix:%s,server' % socket_path,