# Re: \[PATCH\] efi: avoid error message when booting under Xen

- From: Jürgen Groß \<jgross@suse.com\>
- Date: 2020-07-10 13:38:55 
- List: linux-fbdev
- Page: https://ratatoskr.run/linux-fbdev/2020/07/6031897
- Thread: https://ratatoskr.run/xen-devel/2020/06/5995723/t.md

```text
On 10.07.20 15:27, Ard Biesheuvel wrote:
> On Fri, 10 Jul 2020 at 13:17, Bartlomiej Zolnierkiewicz
> [ref] wrote:
>>
>>
>> [ added EFI Maintainer & ML to Cc: ]
>>
>> Hi,
>>
>> On 7/9/20 11:17 AM, Jürgen Groß wrote:
>>> On 28.06.20 10:50, Jürgen Groß wrote:
>>>> Ping?
>>>>
>>>> On 10.06.20 16:10, Juergen Gross wrote:
>>>>> efifb_probe() will issue an error message in case the kernel is booted
>>>>> as Xen dom0 from UEFI as EFI_MEMMAP won't be set in this case. Avoid
>>>>> that message by calling efi_mem_desc_lookup() only if EFI_PARAVIRT
>>>>> isn't set.
>>>>>
> 
> Why not test for EFI_MEMMAP instead of EFI_BOOT?

Honestly I'm not sure EFI_BOOT is always set in that case. If you tell
me it is fine to just replace the test to check for EFI_MEMMAP I'm fine
to modify my patch.


Juergen
```