On Mon, Nov 25, 2019 at 07:44:03PM -0800, Roman Shaposhnik wrote: > On Sun, Nov 24, 2019 at 4:48 PM Marek Marczykowski-Górecki > <marma...@invisiblethingslab.com> wrote: > > Do you have by > > a chance messages of that crash (without efi=no-rs, but with > > EFI_SET_VIRTUAL_ADDRESS_MAP enabled)? Or even a photo if no serial output is > > available? > > With my awesome soldering skills ;-) I managed to rig a serial console. > > Output is attached. Please let me know if you'd like me to run any > other experiments.
Looks helpful, lets try to do something:
> Xen 4.13.0-rc
> (XEN) Xen version 4.13.0-rc (@) (gcc (Alpine 6.4.0) 6.4.0) debug=y Tue Nov
> 26 03:19:38 UTC 2019
> (XEN) Latest ChangeSet:
> (XEN) build-id: 07aa9f711fe09a91be2588ee7df10d93ebe34c80
> (XEN) Bootloader: GRUB 2.03
> (XEN) Command line: com1=115200,8n1 console=com1 loglvl=all noreboot
> dom0_mem=640M,max:640M dom0_max_vcpus=1 dom0_vcpus_pin smt=false
(...)
> (XEN) EFI memory map:
(...)
> (XEN) 0000077587000-00000775f4fff type=5 attr=800000000000000f
This is code that crashes - runtime services code, so somewhere with
actual UEFI code.
(...)
> (XEN) 00000ff900000-00000ffffffff type=11 attr=8000000000000000
> (XEN) Unknown cachability for MFNs 0xff900-0xfffff
The faulting address is in this range. And because of unknown
cachability, it isn't mapped. Try adding 'efi=attr=uc' to the Xen
cmdline.
(...)
> (XEN) Xen call trace:
> (XEN) [<00000000775e0d21>] R 00000000775e0d21
> (XEN) [<00000000775ddb8e>] S 00000000775ddb8e
> (XEN) [<0000000000000000>] F 0000000000000000
> (XEN) [<7fffffff00000000>] F 7fffffff00000000
> (XEN)
> (XEN) Pagetable walk from 00000000ff920020:
> (XEN) L4[0x000] = 00000000787c0063 ffffffffffffffff
> (XEN) L3[0x003] = 0000000071298063 ffffffffffffffff
> (XEN) L2[0x1fc] = 0000000000000000 ffffffffffffffff
> (XEN)
> (XEN) ****************************************
> (XEN) Panic on CPU 0:
> (XEN) FATAL PAGE FAULT
> (XEN) [error_code=0000]
> (XEN) Faulting linear address: 00000000ff920020
> (XEN) ****************************************
> (XEN)
> (XEN) Manual reset required ('noreboot' specified)
--
Best Regards,
Marek Marczykowski-Górecki
Invisible Things Lab
A: Because it messes up the order in which people normally read text.
Q: Why is top-posting such a bad thing?
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