From: Simon Pilkington <simonp.git@mailbox.org>
To: seanjc@google.com
Cc: linux-kernel@vger.kernel.org, kvm@vger.kernel.org,
regressions@lists.linux.dev
Subject: [REGRESSION] from 74a0e79df68a8042fb84fd7207e57b70722cf825: VFIO PCI passthrough no longer works
Date: Tue, 10 Dec 2024 10:04:59 +0100 [thread overview]
Message-ID: <52914da7-a97b-45ad-86a0-affdf8266c61@mailbox.org> (raw)
Hi,
With the aforementioned commit I am no longer able to use PCI
passthrough to a
Windows guest on the X570 chipset with a 5950X CPU.
The minimal reproducer for me is to attach a GPU to the VM and attempt
to start
Windows setup from an iso image. The VM will apparently livelock at the
setup splash
screen before the spinner appears as one of my CPU cores goes up to 100%
usage
until I force off the VM. This could be very machine-specific though.
Reverting to the old XOR check fixes both 6.12.y stable and 6.13-rc2 for me.
Otherwise they're both bad. Can you please look into it? I can share the
config
I used for test builds if it would help.
Regards,
Simon
next reply other threads:[~2024-12-10 9:15 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-12-10 9:04 Simon Pilkington [this message]
2024-12-10 15:47 ` [REGRESSION] from 74a0e79df68a8042fb84fd7207e57b70722cf825: VFIO PCI passthrough no longer works Sean Christopherson
2024-12-10 16:15 ` Tom Lendacky
2024-12-10 20:33 ` Simon Pilkington
2024-12-10 21:06 ` Tom Lendacky
2024-12-10 22:43 ` Sean Christopherson
2024-12-11 8:54 ` Simon Pilkington
2024-12-11 14:37 ` Tom Lendacky
2024-12-11 17:42 ` Simon Pilkington
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=52914da7-a97b-45ad-86a0-affdf8266c61@mailbox.org \
--to=simonp.git@mailbox.org \
--cc=kvm@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=regressions@lists.linux.dev \
--cc=seanjc@google.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox