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

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Subject: Re: [tip:x86/boot] x86/boot: Early parse RSDP and save it in boot_params
From: Ard Biesheuvel <ard.biesheuvel@xxxxxxxxxx>
Date: Wed, 13 Feb 2019 09:01:27 +0100
Cc: Boris Petkov <bp@xxxxxxxxx>, Guenter Roeck <linux@xxxxxxxxxxxx>, Thomas Gleixner <tglx@xxxxxxxxxxxxx>, Linux Kernel Mailing List <linux-kernel@xxxxxxxxxxxxxxx>, "Kirill A. Shutemov" <kirill.shutemov@xxxxxxxxxxxxxxx>, Ingo Molnar <mingo@xxxxxxxxxx>, "Lendacky, Thomas" <thomas.lendacky@xxxxxxx>, Masahiro Yamada <yamada.masahiro@xxxxxxxxxxxxx>, caoj.fnst@xxxxxxxxxxxxxx, Juergen Gross <jgross@xxxxxxxx>, Ingo Molnar <mingo@xxxxxxxxxx>, Kees Cook <keescook@xxxxxxxxxxxx>, "the arch/x86 maintainers" <x86@xxxxxxxxxx>, "H. Peter Anvin" <hpa@xxxxxxxxx>, linux-tip-commits@xxxxxxxxxxxxxxx, Matt Fleming <matt@xxxxxxxxxxxxxxxxxxx>
In-reply-to: <20190213075825.GA1624@localhost.localdomain>
References: <20190211095547.GB1651@localhost.localdomain> <CAKv+Gu_r4Vz2BRpRyJ=UsM1r-+CbyP6heggL+qsKKhJ_iTWhFg@mail.gmail.com> <20190211101011.GA5333@localhost.localdomain> <CAKv+Gu-Tv=Wxhp9k_f4q+AZ+Wqc+joXrnpbz7aKD=75ZKp2Xcw@mail.gmail.com> <20190211102426.GA19618@zn.tnic> <20190211104254.GB19618@zn.tnic> <CAKv+Gu9mm-w66ZZrd7WhuD3_iELS5vUJ0-1DtRq1GDjSsDNEVg@mail.gmail.com> <20190211112009.GE19618@zn.tnic> <20190213015429.GA12592@localhost.localdomain> <CFAC8B79-54C1-4E74-8660-31B0B88BF749@alien8.de> <20190213075825.GA1624@localhost.localdomain>

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?

Follow-Ups:
- Re: [tip:x86/boot] x86/boot: Early parse RSDP and save it in boot_params
  - From: Chao Fan

References:
- Re: [tip:x86/boot] x86/boot: Early parse RSDP and save it in boot_params
  - From: Chao Fan
- Re: [tip:x86/boot] x86/boot: Early parse RSDP and save it in boot_params
  - From: Ard Biesheuvel
- Re: [tip:x86/boot] x86/boot: Early parse RSDP and save it in boot_params
  - From: Chao Fan
- Re: [tip:x86/boot] x86/boot: Early parse RSDP and save it in boot_params
  - From: Ard Biesheuvel
- Re: [tip:x86/boot] x86/boot: Early parse RSDP and save it in boot_params
  - From: Borislav Petkov
- Re: [tip:x86/boot] x86/boot: Early parse RSDP and save it in boot_params
  - From: Borislav Petkov
- Re: [tip:x86/boot] x86/boot: Early parse RSDP and save it in boot_params
  - From: Ard Biesheuvel
- Re: [tip:x86/boot] x86/boot: Early parse RSDP and save it in boot_params
  - From: Borislav Petkov
- Re: [tip:x86/boot] x86/boot: Early parse RSDP and save it in boot_params
  - From: Chao Fan
- Re: [tip:x86/boot] x86/boot: Early parse RSDP and save it in boot_params
  - From: Boris Petkov
- Re: [tip:x86/boot] x86/boot: Early parse RSDP and save it in boot_params
  - From: Chao Fan

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