Stefano,
Have you tested multiple PCI passthrough with this patch?
When I tried to passthrough multiple PCI devices to a HVM domain, I got "Device
0 is already connected" error.
I don't get this error with cs#20347.
Allen
-----Original Message-----
From: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
[mailto:xen-devel-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Stefano Stabellini
Sent: Tuesday, October 20, 2009 8:18 AM
To: xen-devel@xxxxxxxxxxxxxxxxxxx
Subject: [Xen-devel] [PATCH] implement pci coldplug for stubdoms
Hi all,
this patch fixes the circular dependency problem in the toolstack that
prevented pci coldplug from working with stubdoms: after creating the
stubdom we wait for it to be properly initialized before going further.
We release the domain lock while we wait.
Signed-off-by: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
---
diff -r 1355ca322c38 tools/python/xen/xend/XendDomainInfo.py
--- a/tools/python/xen/xend/XendDomainInfo.py Wed Oct 14 16:43:22 2009 +0100
+++ b/tools/python/xen/xend/XendDomainInfo.py Tue Oct 20 15:48:39 2009 +0100
@@ -687,7 +687,7 @@
# Test whether the devices can be assigned
pci_name = pci_dict_to_bdf_str(new_dev)
- _all_assigned_pci_devices = get_all_assigned_pci_devices()
+ _all_assigned_pci_devices = get_all_assigned_pci_devices(self.domid)
if pci_name in _all_assigned_pci_devices:
raise VmError("failed to assign device %s that has"
" already been assigned to other domain." % pci_name)
@@ -905,7 +905,7 @@
self.pci_device_check_attachability(dev)
# If pci platform does not exist, create and exit.
- if existing_dev_info is None:
+ if pci_state == 'Initialising' :
self.device_create(dev_sxp)
return True
@@ -2252,11 +2253,12 @@
if devclass in XendDevices.valid_devices() and devclass != 'vscsi':
log.info("createDevice: %s : %s" % (devclass,
scrub_password(config)))
dev_uuid = config.get('uuid')
- devid = self._createDevice(devclass, config)
-
- # store devid in XendConfig for caching reasons
- if dev_uuid in self.info['devices']:
- self.info['devices'][dev_uuid][1]['devid'] = devid
+ if devclass != 'pci' or not self.info.is_hvm() :
+ devid = self._createDevice(devclass, config)
+
+ # store devid in XendConfig for caching reasons
+ if dev_uuid in self.info['devices']:
+ self.info['devices'][dev_uuid][1]['devid'] = devid
elif devclass == 'vscsi':
vscsi_config = config.get('devs', [])[0]
diff -r 1355ca322c38 tools/python/xen/xend/image.py
--- a/tools/python/xen/xend/image.py Wed Oct 14 16:43:22 2009 +0100
+++ b/tools/python/xen/xend/image.py Tue Oct 20 15:48:39 2009 +0100
@@ -460,6 +460,27 @@
# we would very much prefer not to have a thread here and instead
# have a callback but sadly we don't have Twisted in xend
self.sentinel_thread = thread.start_new_thread(self._sentinel_watch,())
+ if self.device_model.find('stubdom-dm') > -1 :
+ from xen.xend import XendDomain
+ domains = XendDomain.instance()
+ domains.domains_lock.release()
+
+ count = 0
+ while True:
+ orig_state =
xstransact.Read("/local/domain/0/device-model/%i/state"
+ % self.vm.getDomid())
+ # This can occur right after start-up
+ if orig_state != None:
+ break
+
+ log.debug('createDeviceModel %i: orig_state is None, retrying'
% self.vm.getDomid())
+
+ time.sleep(0.1)
+ count += 1
+ if count < 100:
+ continue
+
+ domains.domains_lock.acquire()
def signalDeviceModel(self, cmd, ret, par = None):
if self.device_model is None:
diff -r 1355ca322c38 tools/python/xen/xend/server/pciif.py
--- a/tools/python/xen/xend/server/pciif.py Wed Oct 14 16:43:22 2009 +0100
+++ b/tools/python/xen/xend/server/pciif.py Tue Oct 20 15:48:39 2009 +0100
@@ -73,11 +73,16 @@
dev_str_list = dev_str_list + [dev_str]
return dev_str_list
-def get_all_assigned_pci_devices():
+def get_all_assigned_pci_devices(domid = 0):
dom_list = xstransact.List('/local/domain')
pci_str_list = []
+ ti = 0
+ ts = xstransact.Read('/local/domain/' + str(domid) + '/target')
+ if ts is not None :
+ ti = int(ts)
for d in dom_list:
- if xstransact.Read('/local/domain/' + d + '/target') is None :
+ target = xstransact.Read('/local/domain/' + d + '/target')
+ if int(d) is not ti and target is None :
pci_str_list = pci_str_list + get_assigned_pci_devices(int(d))
return pci_str_list
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