linux-kernel - Re: [tip:x86/boot] x86/boot: Early parse RSDP and save it in boot

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Date:   Wed, 13 Feb 2019 09:01:27 +0100
From:   Ard Biesheuvel <ard.biesheuvel@...aro.org>
To:     Chao Fan <fanc.fnst@...fujitsu.com>
Cc:     Boris Petkov <bp@...en8.de>, Guenter Roeck <linux@...ck-us.net>,
        Thomas Gleixner <tglx@...utronix.de>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
        Ingo Molnar <mingo@...hat.com>,
        "Lendacky, Thomas" <thomas.lendacky@....com>,
        Masahiro Yamada <yamada.masahiro@...ionext.com>,
        caoj.fnst@...fujitsu.com, Juergen Gross <jgross@...e.com>,
        Ingo Molnar <mingo@...nel.org>,
        Kees Cook <keescook@...omium.org>,
        "the arch/x86 maintainers" <x86@...nel.org>,
        "H. Peter Anvin" <hpa@...or.com>,
        linux-tip-commits@...r.kernel.org,
        Matt Fleming <matt@...eblueprint.co.uk>
Subject: Re: [tip:x86/boot] x86/boot: Early parse RSDP and save it in boot_params

On Wed, 13 Feb 2019 at 08:59, Chao Fan <fanc.fnst@...fujitsu.com> 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@...fujitsu.com> 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?