From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
To: Dave Martin <Dave.Martin@arm.com>
Cc: Russell King - ARM Linux <linux@armlinux.org.uk>,
Mark Rutland <mark.rutland@arm.com>,
linux-rt-users@vger.kernel.org,
Ard Biesheuvel <ard.biesheuvel@linaro.org>,
Peter Zijlstra <peterz@infradead.org>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will.deacon@arm.com>,
linux-kernel@vger.kernel.org,
Steven Rostedt <rostedt@goodmis.org>,
tglx@linutronix.de, linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH RT] arm*: disable NEON in kernel mode
Date: Mon, 4 Dec 2017 10:21:46 +0100 [thread overview]
Message-ID: <20171204092145.GE2255@linutronix.de> (raw)
In-Reply-To: <20171201182410.GU22781@e103592.cambridge.arm.com>
On 2017-12-01 18:24:10 [+0000], Dave Martin wrote:
> > diff --git a/arch/arm64/crypto/Kconfig b/arch/arm64/crypto/Kconfig
> > index 70c517aa4501..2a5f05b5a19a 100644
> > --- a/arch/arm64/crypto/Kconfig
> > +++ b/arch/arm64/crypto/Kconfig
> > @@ -19,19 +19,19 @@ config CRYPTO_SHA512_ARM64
> >
> > config CRYPTO_SHA1_ARM64_CE
> > tristate "SHA-1 digest algorithm (ARMv8 Crypto Extensions)"
> > - depends on KERNEL_MODE_NEON
> > + depends on KERNEL_MODE_NEON && !PREEMPT_RT_BASE
> > select CRYPTO_HASH
> > select CRYPTO_SHA1
>
> Sebastian, can you piont to where sha1 (say) hits this issue?
> I wonder whether this is really a sign that some refactoring is needed.
I disabled all NEON in one go. Looking at this, it shouldn't be a issue
with the block-walk. The only thing that might be a problem is that it
can do multiple blocks in one go.
> Cheers
> ---Dave
Sebastian
next prev parent reply other threads:[~2017-12-04 9:22 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-11-30 14:22 [PATCH RT] crypto: limit more FPU-enabled sections Sebastian Andrzej Siewior
2017-11-30 14:30 ` Sebastian Andrzej Siewior
2017-12-01 10:43 ` [PATCH RT] arm*: disable NEON in kernel mode Sebastian Andrzej Siewior
2017-12-01 13:45 ` Sebastian Andrzej Siewior
2017-12-01 14:18 ` Mark Rutland
2017-12-01 14:36 ` Sebastian Andrzej Siewior
2017-12-01 15:03 ` Ard Biesheuvel
2017-12-01 17:58 ` Dave Martin
2017-12-01 18:08 ` Russell King - ARM Linux
2017-12-01 18:24 ` Dave Martin
2017-12-01 19:20 ` Ard Biesheuvel
2017-12-04 9:21 ` Sebastian Andrzej Siewior [this message]
2017-12-01 17:14 ` Peter Zijlstra
2017-12-01 17:31 ` Russell King - ARM Linux
2017-12-01 17:39 ` Peter Zijlstra
2017-11-30 15:19 ` [PATCH RT] crypto: limit more FPU-enabled sections Steven Rostedt
2017-11-30 15:22 ` Sebastian Andrzej Siewior
2017-12-01 10:44 ` [PATCH RT v2] " Sebastian Andrzej Siewior
2017-12-01 11:32 ` Peter Zijlstra
2017-12-01 13:32 ` Sebastian Andrzej Siewior
2017-12-01 13:44 ` Peter Zijlstra
2017-12-01 13:50 ` Sebastian Andrzej Siewior
2017-12-01 14:03 ` [PATCH RT v3] " Sebastian Andrzej Siewior
2017-11-30 15:29 ` [PATCH RT] " Steven Rostedt
2017-11-30 15:41 ` Sebastian Andrzej Siewior
2017-11-30 16:18 ` Steven Rostedt
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