Re: [tip:x86/boot] x86/boot: Early parse RSDP and save it in boot_params

[Ard Biesheuvel]

On Wed, 13 Feb 2019 at 08:59, Chao Fan <fanc.fnst@xxxxxxxxxxxxxx> wrote:
>
> On Wed, Feb 13, 2019 at 08:36:12AM +0100, Boris Petkov wrote:
> >On February 13, 2019 2:54:29 AM GMT+01:00, Chao Fan <fanc.fnst@xxxxxxxxxxxxxx> wrote:
> >>Yes, your PATCH really works well. I tried both efi32 OVMF and efi64
> >>OVMF, all boot.
> >
> >What about the real hardware you are normally testing on? Boots there too?
>
> I testet it in a real EFI machine, it booted, but from command:
> > cat /sys/firmware/efi/fw_platform_size
> 64
>
> We can see it's a 64-bit EFI firmware, and there is no 32-bit EFI firmware available.
>

Did you try booting 32-bit OVMF from 64-bit QEMU?