linux-kernel - Re: [PATCH 0/3] x86_64 EFI runtime service support

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Message-ID: <46C476C2.3020506@zytor.com>
Date:	Thu, 16 Aug 2007 09:09:38 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	"Huang, Ying" <ying.huang@...el.com>
CC:	Andrew Morton <akpm@...ux-foundation.org>, Andi Kleen <ak@...e.de>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Chandramouli Narayanan <mouli@...ux.intel.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/3] x86_64 EFI runtime service support

Huang, Ying wrote:
> 
> One question:
> 
> The boot_params.efi_info.efi_systab is defined as u32. But it should be
> u64 on x86_64, because it comes from firmware and is not controlled by
> bootloader. But, changing it from u32 to u64 will break current i386 EFI
> support, should we change it and fix the i386 EFI bootloader?
> 

The other option is to have a union of a 32-bit and a 64-bit structure.
 I personally don't care, as long as it's consistent, but I think you
need to deal with the people working on EFI currently about that...

	-hpa

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