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Re: [Xen-devel] [REBASE] xen: patches (against Linux kernel) for supporting efi

>>> On 23.05.13 at 12:04, Eric Shelton <eshelton@xxxxxxxxx> wrote:
> 1) The attached code only works on 64-bit systems, due to setting the
> EFI_64BIT in xen_efi_probe().  It looks like a new hypercall is needed
> or an existing hypercall needs to be added to check whether the EFI
> BIOS is 32- or 64-bit (see comment in code).

This is bogus: For one, Xen only works on 64-bit UEFI. And then,
with the actual runtime calls being done by Xen (after translating
arguments as necessary), a 32-bit kernel can call them as much as
a 64-bit one. An obvious benefit of the intermediate hypercall layer.


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