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Date: Wed, 22 Jun 2016 12:47:07 +0000
From: Jason Cooper <>
Cc: Ingo Molnar <>, Kees Cook <>,
	Thomas Garnier <>,
	Andy Lutomirski <>,,
	Borislav Petkov <>, Baoquan He <>,
	Yinghai Lu <>, Juergen Gross <>,
	Matt Fleming <>,
	Toshi Kani <>,
	Andrew Morton <>,
	Dan Williams <>,
	"Kirill A. Shutemov" <>,
	Dave Hansen <>,
	Xiao Guangrong <>,
	Martin Schwidefsky <>,
	"Aneesh Kumar K.V" <>,
	Alexander Kuleshov <>,
	Alexander Popov <>,
	Dave Young <>, Joerg Roedel <>,
	Lv Zheng <>, Mark Salter <>,
	Dmitry Vyukov <>,
	Stephen Smalley <>,
	Boris Ostrovsky <>,
	Christian Borntraeger <>,
	Jan Beulich <>,,
	Jonathan Corbet <>,
Subject: Re: [PATCH v7 0/9] x86/mm: memory area address

Hey Kees,

On Tue, Jun 21, 2016 at 05:46:57PM -0700, Kees Cook wrote:
> Notable problems that needed solving:
>  - Reasonable entropy is needed early at boot before get_random_bytes()
>    is available.

This series is targetting x86, which typically has RDRAND/RDSEED
instructions.  Are you referring to other arches?  Older x86?  Also,
isn't this the same requirement for base address KASLR?

Don't get me wrong, I want more diverse entropy sources available
earlier in the boot process as well. :-)  I'm just wondering what's
different about this series vs base address KASLR wrt early entropy



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