Messages in this thread | | | Date | Tue, 6 Aug 2019 13:55:31 -0500 | From | Bjorn Helgaas <> | Subject | Re: [PATCH] PCI: hv: Detect and fix Hyper-V PCI domain number collision |
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On Mon, Aug 05, 2019 at 02:36:57PM -0400, Sasha Levin wrote: > On Fri, Aug 02, 2019 at 06:52:56PM +0000, Haiyang Zhang wrote: > > Due to Azure host agent settings, the device instance ID's bytes 8 and 9 > > are no longer unique. This causes some of the PCI devices not showing up > > in VMs with multiple passthrough devices, such as GPUs. So, as recommended > > by Azure host team, we now use the bytes 4 and 5 which usually provide > > unique numbers. > > > > In the rare cases of collision, we will detect and find another number > > that is not in use. > > Thanks to Michael Kelley <mikelley@microsoft.com> for proposing this idea.
> > Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com> > > Acked-by: Sasha Levin <sashal@kernel.org> > > Bjorn, will you take it through the PCI tree or do you want me to take > it through hyper-v?
Lorenzo usually applies patches to drivers/pci/controller/*, so that would be my preference.
Bjorn
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