Pkg xen devel - Jan 2019 - Bug#901602: xen-system-amd64: AMD Epyc firmware bug, try to use APIC520

Package: xen-system-amd64
Version: 4.8.3+xsa262+shim4.10.0+comet3-1+deb9u7
Severity: normal

journal log:
--cut--
installing Xen timer for CPU 1
[Firmware Bug]: cpu 1, try to use APIC520 (LVT offset 2) for vector
0xf4, but the register is already in use for vector 0x0 on this cpu
cpu 1 spinlock event irq 293
--cut--

I have installed Debian 9.4 Stretch (stable) with Xen Hypervisor 4.8
on a NUMA machine with two AMD Epyc processors. The machine is booting
in UEFI mode.

This warning message in journal log appears only when booting the
hypervisor kernel. It does not appear when booting the default kernel.

The machine has 32/64 cores/threads and the message appears 64 times.
When using the kernel parameter "dom0_max_vcpus=8 dom0_vcpus_pin" the
message appears only 8 times.


-- System Information:
Debian Release: 9.4
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 4.9.0-6-amd64 (SMP w/8 CPU cores)
Locale: LANG=de_DE.UTF-8, LC_CTYPE=de_DE.UTF-8 (charmap=UTF-8),
LANGUAGE=de_DE.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages xen-system-amd64 depends on:
ii  xen-hypervisor-4.8-amd64  4.8.3+xsa262+shim4.10.0+comet3-1+deb9u7
ii  xen-utils-4.8             4.8.3+xsa262+shim4.10.0+comet3-1+deb9u7

xen-system-amd64 recommends no packages.

xen-system-amd64 suggests no packages.

-- no debconf information

tags 901602 + moreinfo
thanks

Hi Stefan,

I'm going over open bug reports for the Xen packages in Debian, and I
ran into this one.

I think you might at least want to try out Debian Buster with the Xen
4.11 packages which might provide better support for your hardware.

However, I think you might even be better of searching the upstream
xen-users and xen-devel mailing lists archive about epyc, and maybe
subscribing to them instead to join discussions.

I don't think any of the users in the debian xen packages maintainer
team is actively using this hardware now, and for solving the issues you
will likely need help from upstream Xen developers. So, it might be
possible we would only be slowing you down.

Thanks,
Hans

Your message dated Fri, 22 Feb 2019 19:09:20 +0100
with message-id <45db204e-0dca-e0c5-94a0-e9d89c1cc641 at knorrie.org>
and subject line Re: xen-system-amd64: AMD Epyc firmware bug, try to use APIC520
has caused the Debian Bug report #901602,
regarding xen-system-amd64: AMD Epyc firmware bug, try to use APIC520
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

(NB: If you are a system administrator and have no idea what this
message is talking about, this may indicate a serious mail system
misconfiguration somewhere. Please contact owner at bugs.debian.org
immediately.)


-- 
901602: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=901602
Debian Bug Tracking System
Contact owner at bugs.debian.org with problems
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