I got access to such a machine and successfully added >32 cards via
hotplug as well as statically in the initial guest xml of libvirt.
I face maybe related issue around "accel/kvm/kvm-all.c:952:
kvm_irqchip_commit_routes: Assertion `ret == 0' failed." now but noting
seems like the old DPC issue.
Thanks Alex for cross checking.
I got handed a seabios change that was mentioned to make this work.
I'll clean it up and build/test on my own.
Once I have a good feeling I'll submit an RFC upstream for review and
set you on CC.
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Agreed with the initial analysis, there's nothing in device assignment
to limit to 32 devices except where downstream distros have
intentionally added a limit for support purposes. The issue here is
that the host hit a PCIe Downstream Port Containment uncorrectable
error, apparently causing at
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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https://bugs.launchpad.net/bugs/1771238
Title:
Not able to passthrough > 32 PCIe devices to a KVM Guest
To manage
At least for the DPC protection it seems more a kernel issue in regard
to PCIe handling than anything else for now. Due to that I'm adding a
task for the kernel as well.
** Also affects: linux (Ubuntu)
Importance: Undecided
Status: New
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@Khaled El Mously: It's more a feature request.
** No longer affects: qemu
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Title:
Not able to passthrough > 32 PCIe devices to a KVM Guest
To
I removed upstream QEMU from this bug pending further analysis and so we
can go through the right channels if this needs to go upstream.
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Title:
@David Coronel: It's not clear to me - is this a regression?
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Title:
Not able to passthrough > 32 PCIe devices to a KVM Guest
To manage
** Changed in: qemu (Ubuntu)
Importance: High => Undecided
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Title:
Not able to passthrough > 32 PCIe devices to a KVM Guest
To manage
If the host kernel crashes, this is certainly rather a KVM bug than a
QEMU bug, so you should report this to the KVM / kernel mailing list
instead of opening an (upstream) QEMU bug ticket.
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** Changed in: qemu (Ubuntu)
Importance: Critical => High
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Title:
Not able to passthrough > 32 PCIe devices to a KVM Guest
To manage
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