From: Andrew Cooper <andrew.cooper3@citrix.com>
To: "Marek Marczykowski-Górecki" <marmarek@invisiblethingslab.com>,
xen-devel <xen-devel@lists.xenproject.org>
Subject: Re: Linux HVM fails to start with PANIC: early exception 0x00 IP 0010:clear_page_orig+0x12/0x40 error 0
Date: Sun, 12 May 2024 15:48:04 +0100 [thread overview]
Message-ID: <653ba4f5-dc1e-48b9-9833-35b47bfc5fc4@citrix.com> (raw)
In-Reply-To: <ZkAmdiHI-DfUMiOV@mail-itl>
On 12/05/2024 3:16 am, Marek Marczykowski-Górecki wrote:
> Hi,
>
> I've got a report[1] that after some update Linux HVM fails to start with the
> error as in the subject. It looks to be caused by some change between
> Xen 4.17.3 and 4.17.4. Here the failure is on Linux 6.6.25 (both dom0
> and domU), but the 6.1.62 that worked with older Xen before, now fails
> too. The full error (logged via earlyprintk=xen) is:
>
> [ 0.009500] Using GB pages for direct mapping
> PANIC: early exception 0x00 IP 10:ffffffffb01c32e2 error 0 cr2 0xffffa08649801000
> [ 0.009606] CPU: 0 PID: 0 Comm: swapper Not tainted 6.6.25-1.qubes.fc37.x86_64 #1
> [ 0.009665] Hardware name: Xen HVM domU, BIOS 4.17.4 04/26/2024
> [ 0.009710] RIP: 0010:clear_page_orig+0x12/0x40
> [ 0.009766] Code: 84 00 00 00 00 00 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 31 c0 b9 40 00 00 00 0f 1f 44 00 00 ff c9 <48> 89 07 48 89 47 08 48 89 47 10 48 89 47 18 48 89 47 20 48 89 47
> [ 0.009862] RSP: 0000:ffffffffb0e03d58 EFLAGS: 00010016 ORIG_RAX: 0000000000000000
> [ 0.009915] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 000000000000003f
> [ 0.009967] RDX: 0000000000009801 RSI: 0000000000000000 RDI: ffffa08649801000
> [ 0.010015] RBP: 0000000000000001 R08: 0000000000000001 R09: 6b7f283562d74b16
> [ 0.010063] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001
> [ 0.010112] R13: 0000000000000000 R14: ffffffffb0e22a08 R15: ffffa08640000000
> [ 0.010161] FS: 0000000000000000(0000) GS:ffffffffb16ea000(0000) knlGS:0000000000000000
> [ 0.010214] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> [ 0.010257] CR2: ffffa08649801000 CR3: 0000000008e80000 CR4: 00000000000000b0
> [ 0.010310] Call Trace:
> [ 0.010341] <TASK>
> [ 0.010372] ? early_fixup_exception+0xf7/0x190
> [ 0.010416] ? early_idt_handler_common+0x2f/0x3a
> [ 0.010460] ? clear_page_orig+0x12/0x40
> [ 0.010501] ? alloc_low_pages+0xeb/0x150
> [ 0.010541] ? __kernel_physical_mapping_init+0x1d2/0x630
> [ 0.010588] ? init_memory_mapping+0x83/0x160
> [ 0.010631] ? init_mem_mapping+0x9a/0x460
> [ 0.010669] ? memblock_reserve+0x6d/0xf0
> [ 0.010709] ? setup_arch+0x796/0xf90
> [ 0.010748] ? start_kernel+0x63/0x420
> [ 0.010787] ? x86_64_start_reservations+0x18/0x30
> [ 0.010828] ? x86_64_start_kernel+0x96/0xa0
> [ 0.010868] ? secondary_startup_64_no_verify+0x18f/0x19b
> [ 0.010918] </TASK>
>
> I'm pretty sure the exception 0 is misleading here, I don't see how it
> could be #DE.
>
> More logs (including full hypervisor log) are attached to the linked
> issue.
>
> This is on HP 240 g7, and my educated guess is it's Intel Celeron N4020
> CPU. I cannot reproduce the issue on different hardware.
>
> PVH domains seems to work.
>
> Any ideas what could have happened here?
Yes.
Revert the microcode back to revision 0x38 for now.
~Andrew
next prev parent reply other threads:[~2024-05-12 14:48 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-05-12 2:16 Linux HVM fails to start with PANIC: early exception 0x00 IP 0010:clear_page_orig+0x12/0x40 error 0 Marek Marczykowski-Górecki
2024-05-12 14:48 ` Andrew Cooper [this message]
2024-05-28 11:07 ` Andrew Cooper
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