* [Bug 204975] New: AMD-Vi: Command buffer timeout
@ 2019-09-23 23:06 bugzilla-daemon
2019-09-23 23:07 ` [Bug 204975] " bugzilla-daemon
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From: bugzilla-daemon @ 2019-09-23 23:06 UTC (permalink / raw)
To: kvm
https://bugzilla.kernel.org/show_bug.cgi?id=204975
Bug ID: 204975
Summary: AMD-Vi: Command buffer timeout
Product: Virtualization
Version: unspecified
Kernel Version: 4.19.75
Hardware: x86-64
OS: Linux
Tree: Mainline
Status: NEW
Severity: blocking
Priority: P1
Component: kvm
Assignee: virtualization_kvm@kernel-bugs.osdl.org
Reporter: sss123next@list.ru
Regression: No
Created attachment 285127
--> https://bugzilla.kernel.org/attachment.cgi?id=285127&action=edit
dmesg fragment with error
i have "ASRock X470 Gaming K4" motherboard, and using pci-passthrough for
sometime already, working fine on bios version 1.90, had some troubles, but
working overall, unfortunately i decided to update bios to latest versions
(3.40, 3.50), and pci-passthrough stopped work at all, i guess problem rerlated
to new "AMD AGESA Combo-AM4 1.0.0.3", a little searching over internet confirms
what it's common problem across different boards, i do not know exactly is it
amd bug, kvm, bug, or kernel bug, i have already reported problem to board
manufacturer.
in console i get something like "vfio: cannot power on device, stuck in D3"
from qemu.
also a lot of warnings in dmesg (see attachments).
device still visible in lspci, but looks completely unresponsive.
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From: bugzilla-daemon @ 2019-09-23 23:07 UTC (permalink / raw)
To: kvm
https://bugzilla.kernel.org/show_bug.cgi?id=204975
--- Comment #1 from Gluzskiy Alexandr (sss123next@list.ru) ---
Created attachment 285129
--> https://bugzilla.kernel.org/attachment.cgi?id=285129&action=edit
dmesg frament with error
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2019-09-23 23:06 [Bug 204975] New: AMD-Vi: Command buffer timeout bugzilla-daemon
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From: bugzilla-daemon @ 2019-09-23 23:07 UTC (permalink / raw)
To: kvm
https://bugzilla.kernel.org/show_bug.cgi?id=204975
--- Comment #2 from Gluzskiy Alexandr (sss123next@list.ru) ---
Created attachment 285131
--> https://bugzilla.kernel.org/attachment.cgi?id=285131&action=edit
dmesg fragment with error
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2019-09-23 23:06 [Bug 204975] New: AMD-Vi: Command buffer timeout bugzilla-daemon
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From: bugzilla-daemon @ 2019-09-23 23:08 UTC (permalink / raw)
To: kvm
https://bugzilla.kernel.org/show_bug.cgi?id=204975
--- Comment #3 from Gluzskiy Alexandr (sss123next@list.ru) ---
Created attachment 285133
--> https://bugzilla.kernel.org/attachment.cgi?id=285133&action=edit
dmesg fragment with error (latest bios)
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2019-09-23 23:06 [Bug 204975] New: AMD-Vi: Command buffer timeout bugzilla-daemon
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From: bugzilla-daemon @ 2019-09-23 23:08 UTC (permalink / raw)
To: kvm
https://bugzilla.kernel.org/show_bug.cgi?id=204975
--- Comment #4 from Gluzskiy Alexandr (sss123next@list.ru) ---
Created attachment 285135
--> https://bugzilla.kernel.org/attachment.cgi?id=285135&action=edit
dmesg fragment with error (latest bios)
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From: bugzilla-daemon @ 2019-09-23 23:09 UTC (permalink / raw)
To: kvm
https://bugzilla.kernel.org/show_bug.cgi?id=204975
--- Comment #5 from Gluzskiy Alexandr (sss123next@list.ru) ---
Created attachment 285137
--> https://bugzilla.kernel.org/attachment.cgi?id=285137&action=edit
dmidecode output
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From: bugzilla-daemon @ 2019-09-23 23:09 UTC (permalink / raw)
To: kvm
https://bugzilla.kernel.org/show_bug.cgi?id=204975
--- Comment #6 from Gluzskiy Alexandr (sss123next@list.ru) ---
Created attachment 285139
--> https://bugzilla.kernel.org/attachment.cgi?id=285139&action=edit
lspci output
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From: bugzilla-daemon @ 2019-09-23 23:20 UTC (permalink / raw)
To: kvm
https://bugzilla.kernel.org/show_bug.cgi?id=204975
Alex Williamson (alex.williamson@redhat.com) changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |alex.williamson@redhat.com
--- Comment #7 from Alex Williamson (alex.williamson@redhat.com) ---
When we get the "stuck in D3" message, it usually means that we're getting back
-1 on config space reads rather than the device is actually stuck in D3. The
-1 return probably means the downstream bus never recovered when we issued a
secondary bus reset to perform a reset on the GPU. This seems to be common
with AGESA updates and AFAICT indicates a hardware/firmware issue, not a kernel
issue. As you indicate, it worked previously and started failing after BIOS
update. This is the common story, AMD needs to fix secondary bus reset support
on their root ports. I believe some users have had success rolling back their
BIOS to a previous release.
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From: bugzilla-daemon @ 2019-09-23 23:32 UTC (permalink / raw)
To: kvm
https://bugzilla.kernel.org/show_bug.cgi?id=204975
--- Comment #8 from Gluzskiy Alexandr (sss123next@list.ru) ---
i see, got it.
unfortunately manufacturer of this board decided to NOT provide downgrade
option for some reason.
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From: bugzilla-daemon @ 2019-09-25 13:38 UTC (permalink / raw)
To: kvm
https://bugzilla.kernel.org/show_bug.cgi?id=204975
--- Comment #9 from Gluzskiy Alexandr (sss123next@list.ru) ---
is it possible to workaround this problem somehow ?
testing another board (x570 based), same problem.
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From: bugzilla-daemon @ 2019-09-26 14:59 UTC (permalink / raw)
To: kvm
https://bugzilla.kernel.org/show_bug.cgi?id=204975
--- Comment #10 from Gluzskiy Alexandr (sss123next@list.ru) ---
https://community.amd.com/thread/241650 - link to amd own forums for reference.
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From: bugzilla-daemon @ 2020-04-02 11:29 UTC (permalink / raw)
To: kvm
https://bugzilla.kernel.org/show_bug.cgi?id=204975
Masato Yoshida (masato@yoshi.dnsalias.com) changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |masato@yoshi.dnsalias.com
--- Comment #11 from Masato Yoshida (masato@yoshi.dnsalias.com) ---
BioStar's X570GT8 motherboard AGESA 1.0.0.4 patch B has the same error.
OS ubuntu 19.10
kernel 5.4.21
By setting the PCI-E speed to Gen2 in UEFI BIOS, no error occurs and
pass-through can be performed without any problem.
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