linux-kernel - Re: [PATCH v3] x86, efi: Calling __pa() with an ioremap'd address is invalid

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Message-ID: <4EB84644.8060102@zytor.com>
Date:	Mon, 07 Nov 2011 12:57:40 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Matthew Garrett <mjg59@...f.ucam.org>
CC:	Matt Fleming <matt@...sole-pimps.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...e.hu>, Zhang Rui <rui.zhang@...el.com>,
	Huang Ying <huang.ying.caritas@...il.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3] x86, efi: Calling __pa() with an ioremap'd address
 is invalid

On 11/07/2011 12:48 PM, Matthew Garrett wrote:
> 
> If the kernel is able to call boot services then the kernel needs to be 
> signed. If it's all handled by the bootloader then the bootloader can be 
> signed and the kernel doesn't have to be. Depends which one people 
> update more, I guess.
> 

... and what security attributes they are looking for.

However, "EFI stub in the kernel" doesn't mean "can't use an external
bootloader."

	-hpa
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