From: Mike Rapoport <rppt@linux.ibm.com>
To: "Marek Marczykowski-Górecki" <marmarek@invisiblethingslab.com>
Cc: Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@suse.de>,
Thomas Gleixner <tglx@linutronix.de>,
x86@kernel.org, linux-kernel@vger.kernel.org,
xen-devel <xen-devel@lists.xenproject.org>
Subject: Re: Linux 5.13+ as Xen dom0 crashes on Ryzen CPU (ucode loading related?)
Date: Tue, 14 Sep 2021 08:48:07 +0300 [thread overview]
Message-ID: <YUA3l0gnTh0gDJ4d@linux.ibm.com> (raw)
In-Reply-To: <YT9I+Xs9wOPVCIVd@mail-itl>
Hi Marek,
On Mon, Sep 13, 2021 at 02:50:00PM +0200, Marek Marczykowski-Górecki wrote:
> Hi,
>
> Since 5.13, the Xen (PV) dom0 crashes on boot, before even printing the
> kernel version.
> Test environment:
> - Xen 4.14.2
> - AMD Ryzen 5 4500U (reported also on AMD Ryzen 7 4750U)
> - Linux 5.13.13, confirmed also on 5.14
>
> The crash happens only if the initramfs has earlycpio with microcode.
Does the crash happen if you boot the same kernel and initrd directly
without Xen?
> I don't have a serial console, but I've got a photo with crash message
> (from Xen, Linux doesn't managed to print anything):
> https://user-images.githubusercontent.com/726704/133084966-5038f37e-001b-4688-9f90-83d09be3dc2d.jpg
>
> Transcription of some of it:
>
> mapping kernel into physical memory
> about to get started
> (XEN) Pagetable walk from ffffffff82810888:
> (XEN) L4[0x1ff] = 0000000332815067 0000000000002815
> (XEN) L3[0x1fe] = 0000000332816067 0000000000002816
> (XEN) L2[0x014] = 0000000334018067 0000000000004018
> (XEN) L1[0x010] = 0000000332810067 0000000000002810
> (XEN) domain_crash_sync called from entry.S: fault at ffff82d04033e790 x86_64/entry.S#domain_crash_page_fault
> (XEN) Domain 0 (vcpu#0) crashed on cpu#0:
> (XEN) ----[ Xen-4.14.2 x86_64 debug=n Not tainted ]----
> (XEN) CPU: 0
> (XEN) RIP: e033:[<0000000000000000>]
Is it possible to get the actual RIP of the instruction that faulted?
Feeding that to scripts/faddr2line would be just lovely.
> I've bisected it down to the commit a799c2bd29d19c565f37fa038b31a0a1d44d0e4d
>
> x86/setup: Consolidate early memory reservations
>
> Since this seems to affect Xen boot only, I'm copying xen-devel too.
>
> Any ideas?
The only thing I can suggest for now is to move the reservations from
early_reserve_memory() back to where they were before this commit one by
one to see which move caused the crash.
--
Sincerely yours,
Mike.
next prev parent reply other threads:[~2021-09-14 5:48 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-13 12:50 Linux 5.13+ as Xen dom0 crashes on Ryzen CPU (ucode loading related?) Marek Marczykowski-Górecki
2021-09-14 5:48 ` Mike Rapoport [this message]
2021-09-14 7:14 ` Juergen Gross
2021-09-14 8:33 ` Mike Rapoport
2021-09-14 8:42 ` Juergen Gross
2021-09-14 8:39 ` Jan Beulich
2021-09-14 10:51 ` Marek Marczykowski-Górecki
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=YUA3l0gnTh0gDJ4d@linux.ibm.com \
--to=rppt@linux.ibm.com \
--cc=bp@suse.de \
--cc=linux-kernel@vger.kernel.org \
--cc=marmarek@invisiblethingslab.com \
--cc=mingo@redhat.com \
--cc=tglx@linutronix.de \
--cc=x86@kernel.org \
--cc=xen-devel@lists.xenproject.org \
/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