Re: [Xen-devel] Only 1 CPU was detected

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 28.09.17 at 16:36, <honzhan@xxxxxxxxxxxxx> wrote:
>> -----Original Message-----
>>From: Jan Beulich [mailto:JBeulich@xxxxxxxx]
>>Sent: Thursday, September 28, 2017 5:39 PM
>>To: Hongjiang Zhang <honzhan@xxxxxxxxxxxxx>
>>Cc: xen-devel@xxxxxxxxxxxxxxxxxxxx; Juergen Gross <jgross@xxxxxxxx>
>>Subject: RE: [Xen-devel] Only 1 CPU was detected
>>
>>>>> On 28.09.17 at 11:32, <honzhan@xxxxxxxxxxxxx> wrote:
>>>> -----Original Message-----
>>>>From: Jan Beulich [mailto:JBeulich@xxxxxxxx]
>>>>Sent: Thursday, September 28, 2017 4:38 PM
>>>>To: Hongjiang Zhang <honzhan@xxxxxxxxxxxxx>
>>>>Cc: xen-devel@xxxxxxxxxxxxxxxxxxxx; Juergen Gross <jgross@xxxxxxxx>
>>>>Subject: Re: [Xen-devel] Only 1 CPU was detected
>>>>
>>>>>>> On 28.09.17 at 09:22, <honzhan@xxxxxxxxxxxxx> wrote:
>>>>> See the attachment.
>>>>
>>>>With
>>>>
>>>>(XEN) ACPI Error (tbxfroot-0218): A valid RSDP was not found [20070126]
>>>>
>>>>I wonder if you're trying to use xen.gz on an EFI system. Is so, you want to
>>> use
>>>>xen.efi there instead if firmware doesn't set up enough compatibility things
>>> in
>>>>EFI Mode, or enable CSM if an option like this is provided by firmware 
>>>>setup.
>>>>
>>> I cannot use xen.efi. It reports "error: invalid arch-dependent ELF magic"
>>
>>Are you using a 32-bit EFI by chance?
>>
> I don't think so. I used "file xen.efi" to check and it indicates it is 
> x86_64:
> root@lis-f2334:~# file /boot/xen-4.8-amd64.efi
> /boot/xen-4.8-amd64.efi: PE32+ executable (EFI application) x86-64 (stripped 
> to 
> external PDB), for MS Windows

The question was about your firmware, not xen.efi. The latter can
only be built as a 64-bit binary right now. Hence ...

> Shall I build xen by myself?

... no, unless you would first invest quite a bit of work into getting
Xen to also build as a 32-bit EFI binary (and this of course would
help only if indeed your EFI implementation is a 32-bit one).

Jan


_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
https://lists.xen.org/xen-devel