Author: dexuan
Date: Thu Jun 8 12:11:30 2017
New Revision: 319690
URL: https://svnweb.freebsd.org/changeset/base/319690
Log:
hyperv/pcib: use the device serial number as PCI domain
Currently the PCI domain is initialized with the instance GUID in
vmbus_pcib_attach(). It turns out the GUID can change across VM reboot,
while some users want a persistent value for PCI domain. The solution is
that we can change to use the device serial number, which starts with 1
and is unique within a VM.
Obtained from: Haiyang Zhang
MFC after: 1 day
Sponsored by: Microsoft
Modified:
head/sys/dev/hyperv/pcib/vmbus_pcib.c
Modified: head/sys/dev/hyperv/pcib/vmbus_pcib.c
==============================================================================
--- head/sys/dev/hyperv/pcib/vmbus_pcib.c Thu Jun 8 08:10:57 2017
(r319689)
+++ head/sys/dev/hyperv/pcib/vmbus_pcib.c Thu Jun 8 12:11:30 2017
(r319690)
@@ -574,6 +574,8 @@ new_pcichild_device(struct hv_pcibus *hbus, struct pci
hpdev->desc = *desc;
mtx_lock(&hbus->device_list_lock);
+ if (TAILQ_EMPTY(&hbus->children))
+ hbus->pci_domain = desc->ser & 0xFFFF;
TAILQ_INSERT_TAIL(&hbus->children, hpdev, link);
mtx_unlock(&hbus->device_list_lock);
return (hpdev);
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