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Date: Mon, 20 Feb 2017 19:46:58 +0100 From: Daniel Kiper <dkiper@...-space.pl> To: The development of GNU GRUB <grub-devel@....org> Cc: Daniel Kiper <dkiper@...-space.pl>, Juergen Gross <jgross@...e.com>, "Michael S. Tsirkin" <mst@...hat.com>, Matt Fleming <matt@...eblueprint.co.uk>, phcoder@...il.com, Daniel Kiper <daniel.kiper@...cle.com>, x86@...nel.org, linux-kernel@...r.kernel.org, Alexander Graf <agraf@...e.de>, arvidjaar@...il.com, "Luis R. Rodriguez" <mcgrof@...nel.org>, Ingo Molnar <mingo@...hat.com>, Chao Peng <chao.p.peng@...ux.intel.com>, Al Viro <viro@...iv.linux.org.uk>, Andy Lutomirski <luto@...nel.org>, Josh Poimboeuf <jpoimboe@...hat.com>, Paolo Bonzini <pbonzini@...hat.com>, Thomas Gleixner <tglx@...utronix.de>, Borislav Petkov <bp@...e.de>, Amnon Ilan <ailan@...hat.com>, Thomas Garnier <thgarnie@...gle.com>, konrad.wilk@...cle.com Subject: Re: [RFC PATCH] x86/boot: make ELF kernel multiboot-able On Thu, Feb 16, 2017 at 09:00:05PM -0800, H. Peter Anvin wrote: > On 02/16/17 15:27, Daniel Kiper wrote: > > That is obvious. Do you think that Multiboot/Multiboot2 protocols are > > substantially suboptimal? > > Yes. They push a lot of things into the bootloader for no good reason, I have not seen anything in Multiboot(2) specs which stipulates that every bootloader must implement all features. If somebody needs minimal Multiboot(2) compatible bootloader he/she can do that. Just parse Multiboot(2) header and provide, let's call it in that way, empty boot data. Is it difficult? > thus tying the kernel's hands and making the whole boot process more > fragile. Every kernel may take from the bootloader via Multiboot(2) what it needs. No more no less. There is no requirement to use all data provided by the bootloader. > It isn't either like Grub has been very good about keeping to any spec, > their own or others. Could you be more precise? Daniel
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