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

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> 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?

Jan


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