From: "H. Peter Anvin" <hpa@linux.intel.com>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: "Ted Ts'o" <tytso@mit.edu>,
Linus Torvalds <torvalds@linux-foundation.org>,
Ingo Molnar <mingo@kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
Paul Mackerras <paulus@samba.org>,
Michael Ellerman <michael@ellerman.id.au>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v2 4/4] random: Add arch_has_random[_seed]()
Date: Tue, 18 Mar 2014 11:56:03 -0700 [thread overview]
Message-ID: <532896C3.106@linux.intel.com> (raw)
In-Reply-To: <1395114240.15098.205.camel@pasglop>
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
next prev parent reply other threads:[~2014-03-18 18:56 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-03-17 23:36 [PATCH v2 0/4] RDSEED support for the Linux kernel H. Peter Anvin
2014-03-17 23:36 ` [PATCH v2 1/4] x86, random: Enable the RDSEED instruction H. Peter Anvin
2014-03-17 23:36 ` [PATCH v2 2/4] random: Use arch_get_random_seed*() at init time and once a second H. Peter Anvin
2014-03-17 23:36 ` [PATCH v2 3/4] random: If we have arch_get_random_seed*(), try it before blocking H. Peter Anvin
2014-03-17 23:36 ` [PATCH v2 4/4] random: Add arch_has_random[_seed]() H. Peter Anvin
2014-03-18 3:44 ` Benjamin Herrenschmidt
2014-03-18 18:56 ` H. Peter Anvin [this message]
2014-03-18 21:52 ` [PATCH v2 0/4] RDSEED support for the Linux kernel tytso
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