linux-kernel - Re: Use PCI ROMs from EFI boot services

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Date:	Wed, 05 Dec 2012 17:04:09 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Matthew Garrett <mjg59@...f.ucam.org>
CC:	Yinghai Lu <yinghai@...nel.org>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org,
	linux-efi@...r.kernel.org, mfleming@...el.com, dwmw2@...radead.org,
	"Eric W. Biederman" <ebiederm@...ssion.com>
Subject: Re: Use PCI ROMs from EFI boot services

On 12/05/2012 04:57 PM, Matthew Garrett wrote:
> 
> 
> "H. Peter Anvin" <hpa@...or.com> wrote:
> 
>> I don't think there is anything security-sensitive about that
>> information, at least not to root.  I could be wrong, of course; I
>> wouldn't mind security people telling me about that.
> 
> I don't think there's anything at present, but we'll want to pass the hibernation encryption key from the bootloader to the kernel in the near future. setup_data seems like the easiest way to do that. 
> 

And that presumably would be something that cannot be exposed to root?
If so we may want to use one of the bits in the setup_data type field as
a security flag, perhaps...

	-hpa

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