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

On 09/08/2011 21:19, "Jordan Justen" <jljusten@xxxxxxxxx> wrote:

>>> 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.
>> Yes, that's the sort of thing I was getting at.
> The IA32 firmware is used for IA32 UEFI operating systems, and the X64
> firmware is used for X64 operating systems.

I assume a native box would only have one UEFI firmware, and that would be
X64 on an x86/64 box. You must still be able to boot IA32 operating systems
on the X64 firmware, right?

> X64 is somewhat more commonly used on modern systems.
> There could be an auto-detect mode for the default of IA32 or X64
> based on the installed CPU, but there might still be a case where
> someone would prefer to run OVMF IA32 on an X64 processor.

Such as?

 -- Keir

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