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: Borislav Petkov <bp@xxxxxxxxx>
Date: Mon, 11 Feb 2019 13:16:38 +0100
Cc: Chao Fan <fanc.fnst@xxxxxxxxxxxxxx>, 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: <CAKv+Gu-xbw2Rn41brkeFuv2kLxwXknHpB+vG5SVXE8GZdyyj7A@mail.gmail.com>
References: <CAKv+Gu-6bxRrn7Ft4cRYzB1Jgca=L_d1u5OU1nUzLe7SBEd=xQ@mail.gmail.com> <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> <20190211110451.GD19618@zn.tnic> <CAKv+Gu-xbw2Rn41brkeFuv2kLxwXknHpB+vG5SVXE8GZdyyj7A@mail.gmail.com>
User-agent: Mutt/1.10.1 (2018-07-13)

On Mon, Feb 11, 2019 at 11:55:27AM +0000, Ard Biesheuvel wrote:
> It you have CONFIG_EFI_MIXED enabled, you can in fact use 32-bit UEFI
> runtime services from 64-bit Linux, so just using the tables should be
> fine as well, and I don't think we should hide that behind a Kconfig
> option. (Note that ACPI defines its table layouts without regard for
> architecture bitness, so this is just about the minimal EFI table
> parsing that is required to get at the RDSP)

Ok, understood.

Thx.

-- 
Regards/Gruss,
    Boris.

Good mailing practices for 400: avoid top-posting and trim the reply.

References:
- 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: 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: Ard Biesheuvel

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