[Xen-changelog] [xen-unstable] xend: Allow vtpm instance uuid to be specified on domain creation

[Xen patchbot-unstable <patchbot-unstable@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User Keir Fraser <keir.fraser@xxxxxxxxxx>
# Date 1251097546 -3600
# Node ID dde06d43143b71a72d979d8040a887534e321b32
# Parent  3a6aaadaa035fcce2ea8b6cef2e282d9cec672d1
xend: Allow vtpm instance uuid to be specified on domain creation

Right now xen will create a new vtpm instance everytime you start up a
domU, even if you specify the instance parameter in your config file.
Each vtpm instance is then given a uuid and the vtpm.db file maps
instance numbers to uuid numbers.

This patch is a hack that lets you explicitly set the uuid of your
vtpm instance. Everytime you boot up your domU now the vtpm will get
that uuid and thus it will always get the same vtpm instance number
instead of being generated a new one.

So for example, in your config file you would do something like this
vtpm = [ 'backend=0,uuid=dcdb124b-9fed-4040-b149-dd2dfd8d094c' ]

Signed-off-by: Matt Fioravante <Matthew.Fioravante@xxxxxxxxxx>
---
 tools/python/xen/xm/create.py |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletion(-)

diff -r 3a6aaadaa035 -r dde06d43143b tools/python/xen/xm/create.py
--- a/tools/python/xen/xm/create.py     Mon Aug 24 08:03:46 2009 +0100
+++ b/tools/python/xen/xm/create.py     Mon Aug 24 08:05:46 2009 +0100
@@ -890,6 +890,7 @@ def configure_vtpm(config_devs, vals):
     if len(vtpm) > 0:
         d = vtpm[0]
         instance = d.get('instance')
+        uuid = d.get('uuid')
         if instance == "VTPMD":
             instance = "0"
         else:
@@ -908,6 +909,8 @@ def configure_vtpm(config_devs, vals):
             config_vtpm.append(['backend', backend])
         if typ:
             config_vtpm.append(['type', type])
+        if uuid:
+            config_vtpm.append(['uuid', type])
         config_devs.append(['device', config_vtpm])
 
 
@@ -1147,7 +1150,7 @@ def preprocess_vtpm(vals):
             (k, v) = b.strip().split('=', 1)
             k = k.strip()
             v = v.strip()
-            if k not in ['backend', 'instance']:
+            if k not in ['backend', 'instance', 'uuid']:
                 err('Invalid vtpm specifier: ' + vtpm)
             d[k] = v
         vtpms.append(d)

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