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

[Hongjiang Zhang <honzhan@xxxxxxxxxxxxx>]

>-----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

Shall I build xen by myself?

>Jan


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