Hi Stefano,
Your patch has been checked in as changeset 20397: bd60c77071eb with which the
issues I mentioned disappear.
However, 2 new issues arise (for ioemu, I'm using the latest
3140780e451d3919ef2c81f91ae0ebe3f286eb06; I only tried the non-stubdomain case):
1) After assigning 2 devices to an hvm guest,
# xm pci-list my_domain_id
VSlt VFn domain bus slot func
0x05 0x0 0x0000 0x01 0x00 0x0
- - 0x0000 0x07 0x00 0x0 ===> the VSlt and VFn don't show properly.
2)
# xm pci-attach my_domain_id 01:00.0
# xm pci-attach my_domain_id 07:00.0
# xm pci-list my_domain_id
VSlt VFn domain bus slot func
0x04 0x0 0x0000 0x01 0x00 0x0
0x05 0x0 0x0000 0x07 0x00 0x0
# xm pci-detach my_domain_id 01:00.0
# xm pci-detach my_domain_id 07:00.0
Error: Failed to deassign device from IOMMU (0000:07:00.0)
Can you try the 2 cases?
BTW, in xend/XendDomainInfo.py: device_configure() -> pci_device_configure(),
the usage of 'first_dev' is suspicious, e.g., after we create hvm guest without
any device assigned, we can try to 'xm pci-attach' a device to the guest -- at
this time, 'first_dev' is False in pci_device_configure. I guess it's not ok.
Thanks,
-- Dexuan
-----Original Message-----
From: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
[mailto:xen-devel-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Stefano Stabellini
Sent: 2009?11?3? 19:31
To: xen-devel@xxxxxxxxxxxxxxxxxxx
Subject: [Xen-devel] [PATCH] xen passthrough: fix recent regressions
Hi all,
this patch fixes the recent regressions pointed out by Dexuan, keeping
pci passthrough working with stubdom too.
In particular calling device_create when pci_state == 'Initialising' is
a mistake because the state is always Initialising when attaching a
devicem while device_create has too be called only when the pci backend
is missing.
Signed-off-by: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
---
diff -r 47136dbb972d tools/python/xen/xend/XendDomainInfo.py
--- a/tools/python/xen/xend/XendDomainInfo.py Wed Oct 28 10:59:55 2009 +0000
+++ b/tools/python/xen/xend/XendDomainInfo.py Tue Nov 03 11:06:16 2009 +0000
@@ -597,6 +597,7 @@
return
devid = '0'
+ first = True
dev_info = self._getDeviceInfo_pci(devid)
if dev_info is None:
return
@@ -619,7 +620,8 @@
head_dev = dev.pop()
dev_sxp = pci_convert_dict_to_sxp(head_dev, 'Initialising',
'Booting')
- self.pci_device_configure(dev_sxp)
+ self.pci_device_configure(dev_sxp, first_dev = first)
+ first = False
# That is all for single-function virtual devices
if len(dev) == 0:
@@ -829,7 +831,7 @@
return self.getDeviceController(dev_type).sxpr(devid)
- def pci_device_configure(self, dev_sxp, devid = 0):
+ def pci_device_configure(self, dev_sxp, devid = 0, first_dev = False):
"""Configure an existing pci device.
@param dev_sxp: device configuration
@@ -859,13 +861,13 @@
dev = dev_config['devs'][0]
stubdomid = self.getStubdomDomid()
- if stubdomid is not None :
- from xen.xend import XendDomain
-
XendDomain.instance().domain_lookup(stubdomid).pci_device_configure(dev_sxp[:])
-
# Do HVM specific processing
if self.info.is_hvm():
+ from xen.xend import XendDomain
if pci_state == 'Initialising':
+ if stubdomid is not None :
+
XendDomain.instance().domain_lookup(stubdomid).pci_device_configure(dev_sxp[:])
+
# HVM PCI device attachment
if pci_sub_state == 'Booting':
vdevfn = self.hvm_pci_device_insert(dev_config)
@@ -896,6 +898,8 @@
# same vslot.
if (PCI_FUNC(int(new_dev['vdevfn'], 16)) == 0):
self.hvm_destroyPCIDevice(new_dev)
+ if stubdomid is not None :
+
XendDomain.instance().domain_lookup(stubdomid).pci_device_configure(dev_sxp[:])
# Update vdevfn
dev['vdevfn'] = new_dev['vdevfn']
for n in sxp.children(pci_dev):
@@ -908,15 +912,22 @@
self.pci_device_check_attachability(dev)
# If pci platform does not exist, create and exit.
- if pci_state == 'Initialising' :
+ if existing_dev_info is None :
self.device_create(dev_sxp)
+ return True
+
+ if first_dev is True :
+ existing_dev_uuid = sxp.child_value(existing_dev_info, 'uuid')
+ existing_pci_conf = self.info['devices'][existing_dev_uuid][1]
+ devid = self._createDevice('pci', existing_pci_conf)
+ self.info['devices'][existing_dev_uuid][1]['devid'] = devid
return True
if self.domid is not None:
# use DevController.reconfigureDevice to change device config
dev_control = self.getDeviceController(dev_class)
dev_uuid = dev_control.reconfigureDevice(devid, dev_config)
- if not self.info.is_hvm():
+ if not self.info.is_hvm() and not self.info.is_stubdom():
# in PV case, wait until backend state becomes connected.
dev_control.waitForDevice_reconfigure(devid)
num_devs = dev_control.cleanupDevice(devid)
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