linux-kernel - Re: [PATCH v2 4/4] random: Add arch_has_random[

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Message-ID: <532896C3.106@linux.intel.com>
Date:	Tue, 18 Mar 2014 11:56:03 -0700
From:	"H. Peter Anvin" <hpa@...ux.intel.com>
To:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
CC:	Ted Ts'o <tytso@....edu>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Ingo Molnar <mingo@...nel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Paul Mackerras <paulus@...ba.org>,
	Michael Ellerman <michael@...erman.id.au>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 4/4] random: Add arch_has_random[_seed]()

On 03/17/2014 08:44 PM, Benjamin Herrenschmidt wrote:
> On Mon, 2014-03-17 at 16:36 -0700, H. Peter Anvin wrote:
>> Add predicate functions for having arch_get_random[_seed]*().  The
>> only current use is to avoid the loop in arch_random_refill() when
>> arch_get_random_seed_long() is unavailable.
> 
> Paul, I think our HW rng on P7+ and later would qualify no ?
> 
> Cheers,
> Ben.

Just to be clear: since I don't know the parameters of the PowerPC hwrng
I just put in the stub functions, leaving it up to you to analyze if it
is suitable and analyze it.  Do let me know if I can be of any
assistance, of course.

	-hpa



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