Re: [Xen-devel] [PATCH 2 of 3] Enable UEFI BIOS(OVMF) support in Xen-unstable HVM

[Keir Fraser <keir@xxxxxxx>]

On 09/08/2011 15:39, "Ian Campbell" <Ian.Campbell@xxxxxxxxxxxxx> wrote:

>>> +    { "ovmf-ia32", &ovmf32_config, },
>>> +    { "ovmf-x64", &ovmf64_config, },
>>         
>>         
>>         I suppose these (asymmetric) names are OVMF-isms?
>> Yes, these two are the names of OVMF BIOS in platform IA32 and X64.
> 
> Ick, but oh well...
> 
> Is there any reason to prefer one to the other? How do I choose which
> one I want? Can it be autodetected?

I suspect ovmf-x64 is a superset of the capabilities of ovmf-ia32 (e.g.,
ability to boot UEFI-bootable 64-bit OSes?). If so, we should only support
one config option -- "ovmf" -- and have hvmloader auto-load the appropriate
OVMF build, based on CPUID.long_mode.

 -- Keir



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