From: Paul Mackerras <paulus@ozlabs.org>
To: Michael Ellerman <mpe@ellerman.id.au>
Cc: linuxppc-dev@ozlabs.org, Nicholas Piggin <npiggin@gmail.com>
Subject: Re: [PATCH 07/11] powerpc: Add support for microwatt's hardware random number generator
Date: Thu, 17 Jun 2021 08:22:16 +1000 [thread overview]
Message-ID: <YMp5mLe3K0DODyoa@thinks.paulus.ozlabs.org> (raw)
In-Reply-To: <87bl86rlv1.fsf@mpe.ellerman.id.au>
On Wed, Jun 16, 2021 at 11:16:02PM +1000, Michael Ellerman wrote:
> Nicholas Piggin <npiggin@gmail.com> writes:
> > I would be happier if you didn't change this (or at least put it in its
> > own patch explaining why it's not going to slow down other platforms).
>
> It would essentially be a revert of 01c9348c7620 ("powerpc: Use hardware
> RNG for arch_get_random_seed_* not arch_get_random_*")
>
> Which would be ironic :)
You expect me to remember things I did 6 years ago? :)
I'll take this part out. My thinking originally was that since darn
on Microwatt is a single-cycle instruction, it would be faster to use
darn every time rather than run a software PRNG seeded from darn.
It's not critical though.
Paul.
next prev parent reply other threads:[~2021-06-16 22:22 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-14 22:56 [PATCH 00/11] powerpc: Add support for Microwatt soft-core Paul Mackerras
2021-06-14 22:57 ` [PATCH 01/11] powerpc: Add Microwatt platform Paul Mackerras
2021-06-16 18:40 ` Segher Boessenkool
2021-06-16 22:24 ` Paul Mackerras
2021-06-14 22:58 ` [PATCH 02/11] powerpc: Add Microwatt device tree Paul Mackerras
2021-06-17 4:41 ` Michael Ellerman
2021-06-18 2:58 ` Paul Mackerras
2021-06-14 22:59 ` [PATCH 03/11] powerpc/radix: Add support for microwatt's PRTBL SPR Paul Mackerras
2021-06-15 1:12 ` Nicholas Piggin
2021-06-14 23:00 ` [PATCH 04/11] powerpc/microwatt: Populate platform bus from device-tree Paul Mackerras
2021-06-14 23:00 ` [PATCH 05/11] powerpc/xics: Add a native ICS backend for microwatt Paul Mackerras
2021-06-14 23:01 ` [PATCH 06/11] powerpc: microwatt: Use standard 16550 UART for console Paul Mackerras
2021-06-16 20:42 ` Segher Boessenkool
2021-06-14 23:02 ` [PATCH 07/11] powerpc: Add support for microwatt's hardware random number generator Paul Mackerras
2021-06-15 1:40 ` Nicholas Piggin
2021-06-16 13:16 ` Michael Ellerman
2021-06-16 22:22 ` Paul Mackerras [this message]
2021-06-14 23:02 ` [PATCH 08/11] powerpc/microwatt: Add microwatt_defconfig Paul Mackerras
2021-06-14 23:03 ` [PATCH 10/11] powerpc/microwatt: Add a boot wrapper for Microwatt Paul Mackerras
2021-06-14 23:04 ` [PATCH 09/11] powerpc: boot: Fixup device-tree on little endian Paul Mackerras
2021-06-14 23:05 ` [PATCH 11/11] powerpc/microwatt: Disable interrupts in boot wrapper main program Paul Mackerras
2021-06-15 1:21 ` Nicholas Piggin
2021-06-16 23:37 ` Segher Boessenkool
2021-06-17 1:40 ` Nicholas Piggin
2021-06-17 4:06 ` Michael Ellerman
2021-06-17 16:54 ` Segher Boessenkool
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