linux-kernel - Re: [PATCH 3/3] efi: Make efi virtual runtime map passing more robust

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Date:	Tue, 17 Dec 2013 13:51:56 +0000
From:	Matt Fleming <matt@...sole-pimps.org>
To:	Borislav Petkov <bp@...en8.de>
Cc:	Linux EFI <linux-efi@...r.kernel.org>, X86 ML <x86@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Borislav Petkov <bp@...e.de>,
	Matthew Garrett <mjg59@...f.ucam.org>,
	"H. Peter Anvin" <hpa@...or.com>, Dave Young <dyoung@...hat.com>,
	James Bottomley <James.Bottomley@...senPartnership.com>,
	Vivek Goyal <vgoyal@...hat.com>,
	Toshi Kani <toshi.kani@...com>,
	Arjan van de Ven <arjan@...ux.intel.com>
Subject: Re: [PATCH 3/3] efi: Make efi virtual runtime map passing more robust

On Tue, 17 Dec, at 02:40:06PM, Borislav Petkov wrote:
> On Tue, Dec 17, 2013 at 12:10:24PM +0000, Matt Fleming wrote:
> > You sunk my i386 battleship,
> > 
> > /home/build/git/efi/arch/x86/platform/efi/efi.c:824:24: error: ‘struct real_mode_header’ has no member named ‘trampoline_pgd’
> > make[4]: *** [arch/x86/platform/efi/efi.o] Error 1
> > make[3]: *** [arch/x86/platform/efi] Error 2
> 
> Right, this is a recurring issue with the trampoline_pgd. What do you
> prefer: an #ifdef CONFIG_X86_64 or a separate function in efi_$(BITS).c?

Couldn't we do the mapping in efi_setup_page_tables() if we pass
__pa(new_memmap) and 1 << new_memmap_shift as arguments?

-- 
Matt Fleming, Intel Open Source Technology Center
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