Re: [Xen-devel] Nested Virtualisation and UEFI

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 04.09.15 at 13:35, <james@xxxxxxxxxxxxxx> wrote:
> I was worried about spamming the list by sending the full logs but if that 
> is likely to have the most useful 
> information then here we go...

And indeed not all of it would have been needed:

> FS0:\EFI\Xen\> xen-4.5.1.efi
> Xen 4.5.1 (c/s ) EFI loader
> Using configuration file 'xen.cfg'
> vmlinuz: 0x00000000ecdf2000-0x00000000ed4373d0
> initrd.img: 0x00000000eac52000-0x00000000ebfffe4d
>  __  __            _  _    ____   _
>  \ \/ /___ _ __   | || |  | ___| / |
>   \  // _ \ '_ \  | || |_ |___ \ | |
>   /  \  __/ | | | |__   _| ___) || |
>  /_/\_\___|_| |_|    |_|(_)____(_)_|
> 
> (XEN) Xen version 4.5.1 (@dingwall.me.uk) (x86_64-pc-linux-gnu-gcc (Gentoo 
> 4.8.4 p1.6, pie-0.6.1) 4.8.4) debug=n 
> Wed Aug 26 09:42:27 BST 2015
> (XEN) Latest ChangeSet:
> (XEN) Bootloader: EFI
> (XEN) Command line: xsave=0 iommu=1 basevideo console=vga,com1 
> com1=115200,8n1 dom0_max_vcpus=4 
> dom0_mem=max:1664m tmem tmem_dedup=on tmem_compress=on
> (XEN) Video information:
> (XEN)  VGA is graphics mode 800x600, 32 bpp
> (XEN) Disc information:
> (XEN)  Found 0 MBR signatures
> (XEN)  Found 1 EDD information structures
> (XEN) EFI RAM map:
> (XEN)  0000000000000000 - 000000000009f000 (usable)
> (XEN)  000000000009f000 - 00000000000a0000 (ACPI NVS)
> (XEN)  0000000000100000 - 00000000eecf5000 (usable)
> (XEN)  00000000eecf5000 - 00000000eee44000 (reserved)
> (XEN)  00000000eee44000 - 00000000efec4000 (usable)
> (XEN)  00000000efec4000 - 00000000eff18000 (reserved)
> (XEN)  00000000eff18000 - 00000000eff22000 (usable)
> (XEN)  00000000eff22000 - 00000000eff24000 (ACPI data)
> (XEN)  00000000eff24000 - 00000000eff28000 (ACPI NVS)
> (XEN)  00000000eff28000 - 00000000effd0000 (usable)
> (XEN)  00000000effd0000 - 00000000efff0000 (reserved)
> (XEN)  00000000efff0000 - 00000000f0000000 (usable)
> (XEN)  0000000100000000 - 000000050eded000 (usable)
> (XEN) ACPI: System description tables not found

Here is the reason for e.g. interrupts not working. There may be
ways from the EFI shell to investigate what (presumably in the
System Table or Configuration Table) is wrong or not being
recognized properly by xen.efi; otherwise xen.efi may need
instrumenting.

Jan


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