From: Dave Martin <Dave.Martin@arm.com>
To: "Alex Bennée" <alex.bennee@linaro.org>
Cc: linux-arch@vger.kernel.org, libc-alpha@sourceware.org,
Ard Biesheuvel <ard.biesheuvel@linaro.org>,
Szabolcs Nagy <szabolcs.nagy@arm.com>,
gdb@sourceware.org, Yao Qi <Yao.Qi@arm.com>,
Alan Hayward <alan.hayward@arm.com>,
Will Deacon <will.deacon@arm.com>,
Richard Sandiford <richard.sandiford@arm.com>,
Catalin Marinas <catalin.marinas@arm.com>,
kvmarm@lists.cs.columbia.edu,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH 09/27] arm64/sve: Signal frame and context structure definition
Date: Tue, 22 Aug 2017 16:41:11 +0100 [thread overview]
Message-ID: <20170822154111.GW6321@e103592.cambridge.arm.com> (raw)
In-Reply-To: <87shgj4pc7.fsf@linaro.org>
On Tue, Aug 22, 2017 at 04:03:20PM +0100, Alex Bennée wrote:
>
> Dave Martin <Dave.Martin@arm.com> writes:
>
> > On Tue, Aug 22, 2017 at 02:53:49PM +0100, Alex Bennée wrote:
[...]
> >> +
> >> +#define SVE_VQ_BITS 128 /* 128 bits in one quadword */
> >> +#define SVE_VQ_BYTES (SVE_VQ_BITS / 8)
> >> +
> >
> > I was trying to keep extraneous #defines to a minimum, since this is a
> > uapi header, and people may depend on anything defined here.
> >
> > I think SVE_VQ_BYTES is reasonable to have, and this allows us to
> > rewrite a few hard-coded 0x10s and 16s symbolically which is probably a
> > good idea -- I'll add this.
> >
> > SVE_VQ_BITS looks redundant to me though. It wouldn't be used for any
> > purpose other than defining SVE_VQ_BYTES.
>
> Yeah I was more concerned with getting rid of the magic 0x10's than
> showing exactly how many bits something is.
OK, I'll take SVE_VQ_BYTES and use it in the appropriate places.
There are a few 0x10s/16s in the series that can use this instead
of being open-coded.
Cheers
---Dave
next prev parent reply other threads:[~2017-08-22 15:41 UTC|newest]
Thread overview: 124+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-08-09 12:05 [PATCH 00/27] ARM Scalable Vector Extension (SVE) Dave Martin
2017-08-09 12:05 ` [PATCH 01/27] regset: Add support for dynamically sized regsets Dave Martin
2017-08-09 12:05 ` Dave Martin
2017-08-18 11:52 ` Alex Bennée
2017-08-18 11:52 ` Alex Bennée
2017-08-09 12:05 ` [PATCH 02/27] arm64: KVM: Hide unsupported AArch64 CPU features from guests Dave Martin
2017-08-09 12:05 ` Dave Martin
2017-08-16 11:10 ` Marc Zyngier
2017-08-16 20:32 ` Dave Martin
2017-08-17 8:45 ` Marc Zyngier
2017-08-17 9:57 ` Dave Martin
2017-08-17 9:57 ` Dave Martin
2017-08-09 12:05 ` [PATCH 03/27] arm64: efi: Add missing Kconfig dependency on KERNEL_MODE_NEON Dave Martin
2017-08-18 12:02 ` Alex Bennée
2017-08-18 12:02 ` Alex Bennée
2017-08-09 12:05 ` [PATCH 04/27] arm64: Port deprecated instruction emulation to new sysctl interface Dave Martin
2017-08-18 12:09 ` Alex Bennée
2017-08-18 12:09 ` Alex Bennée
2017-08-09 12:05 ` [PATCH 05/27] arm64: fpsimd: Simplify uses of {set,clear}_ti_thread_flag() Dave Martin
2017-08-15 17:11 ` Ard Biesheuvel
2017-08-18 16:36 ` [PATCH 05/27] arm64: fpsimd: Simplify uses of {set, clear}_ti_thread_flag() Alex Bennée
2017-08-18 16:36 ` Alex Bennée
2017-08-09 12:05 ` [PATCH 06/27] arm64/sve: System register and exception syndrome definitions Dave Martin
2017-08-21 9:33 ` Alex Bennée
2017-08-21 9:33 ` Alex Bennée
2017-08-21 12:34 ` Alex Bennée
2017-08-21 12:34 ` Alex Bennée
2017-08-21 14:26 ` Dave Martin
2017-08-21 14:50 ` Alex Bennée
2017-08-21 14:50 ` Alex Bennée
2017-08-21 15:19 ` Dave Martin
2017-08-21 15:34 ` Alex Bennée
2017-08-21 15:34 ` Alex Bennée
2017-08-21 13:56 ` Dave Martin
2017-08-21 13:56 ` Dave Martin
2017-08-21 14:36 ` Alex Bennée
2017-08-21 14:36 ` Alex Bennée
2017-08-09 12:05 ` [PATCH 07/27] arm64/sve: Low-level SVE architectural state manipulation functions Dave Martin
2017-08-21 10:11 ` Alex Bennée
2017-08-21 10:11 ` Alex Bennée
2017-08-21 14:38 ` Dave Martin
2017-08-21 14:38 ` Dave Martin
2017-08-09 12:05 ` [PATCH 08/27] arm64/sve: Kconfig update and conditional compilation support Dave Martin
2017-08-21 10:12 ` Alex Bennée
2017-08-21 10:12 ` Alex Bennée
2017-08-09 12:05 ` [PATCH 09/27] arm64/sve: Signal frame and context structure definition Dave Martin
2017-08-09 12:05 ` Dave Martin
2017-08-22 10:22 ` Alex Bennée
2017-08-22 10:22 ` Alex Bennée
2017-08-22 11:17 ` Dave Martin
2017-08-22 13:53 ` Alex Bennée
2017-08-22 13:53 ` Alex Bennée
2017-08-22 14:21 ` Dave Martin
2017-08-22 14:21 ` Dave Martin
2017-08-22 15:03 ` Alex Bennée
2017-08-22 15:03 ` Alex Bennée
2017-08-22 15:41 ` Dave Martin [this message]
2017-08-09 12:05 ` [PATCH 10/27] arm64/sve: Low-level CPU setup Dave Martin
2017-08-09 12:05 ` Dave Martin
2017-08-22 15:04 ` Alex Bennée
2017-08-22 15:04 ` Alex Bennée
2017-08-22 15:33 ` Dave Martin
2017-08-09 12:05 ` [PATCH 11/27] arm64/sve: Core task context handling Dave Martin
2017-08-15 17:31 ` Ard Biesheuvel
2017-08-16 10:40 ` Dave Martin
2017-08-17 16:42 ` Dave Martin
2017-08-17 16:46 ` Ard Biesheuvel
2017-08-22 16:21 ` Alex Bennée
2017-08-22 16:21 ` Alex Bennée
2017-08-22 17:19 ` Dave Martin
2017-08-22 18:39 ` Alex Bennée
2017-08-22 18:39 ` Alex Bennée
2017-08-09 12:05 ` [PATCH 12/27] arm64/sve: Support vector length resetting for new processes Dave Martin
2017-08-09 12:05 ` Dave Martin
2017-08-22 16:22 ` Alex Bennée
2017-08-22 16:22 ` Alex Bennée
2017-08-22 17:22 ` Dave Martin
2017-08-22 17:22 ` Dave Martin
2017-08-09 12:05 ` [PATCH 13/27] arm64/sve: Signal handling support Dave Martin
2017-08-23 9:38 ` Alex Bennée
2017-08-23 9:38 ` Alex Bennée
2017-08-23 11:30 ` Dave Martin
2017-08-09 12:05 ` [PATCH 14/27] arm64/sve: Backend logic for setting the vector length Dave Martin
2017-08-23 15:33 ` Alex Bennée
2017-08-23 15:33 ` Alex Bennée
2017-08-23 17:29 ` Dave Martin
2017-08-09 12:05 ` [PATCH 15/27] arm64/sve: Probe SVE capabilities and usable vector lengths Dave Martin
2017-08-16 17:48 ` Suzuki K Poulose
2017-08-17 10:04 ` Dave Martin
2017-08-17 10:04 ` Dave Martin
2017-08-17 10:46 ` Suzuki K Poulose
2017-08-17 10:46 ` Suzuki K Poulose
2017-08-09 12:05 ` [PATCH 16/27] arm64/sve: Preserve SVE registers around kernel-mode NEON use Dave Martin
2017-08-09 12:05 ` Dave Martin
2017-08-15 17:37 ` Ard Biesheuvel
2017-08-15 17:37 ` Ard Biesheuvel
2017-08-09 12:05 ` [PATCH 17/27] arm64/sve: Preserve SVE registers around EFI runtime service calls Dave Martin
2017-08-15 17:44 ` Ard Biesheuvel
2017-08-16 9:13 ` Dave Martin
2017-08-09 12:05 ` [PATCH 18/27] arm64/sve: ptrace and ELF coredump support Dave Martin
2017-08-09 12:05 ` [PATCH 19/27] arm64/sve: Add prctl controls for userspace vector length management Dave Martin
2017-08-09 12:05 ` [PATCH 20/27] arm64/sve: Add sysctl to set the default vector length for new processes Dave Martin
2017-08-09 12:05 ` [PATCH 21/27] arm64/sve: KVM: Prevent guests from using SVE Dave Martin
2017-08-09 12:05 ` Dave Martin
2017-08-15 16:33 ` Marc Zyngier
2017-08-15 16:33 ` Marc Zyngier
2017-08-16 10:50 ` Dave Martin
2017-08-16 11:20 ` Marc Zyngier
2017-08-16 11:22 ` Marc Zyngier
2017-08-16 11:35 ` Dave Martin
2017-08-09 12:05 ` [PATCH 22/27] arm64/sve: KVM: Treat guest SVE use as undefined instruction execution Dave Martin
2017-08-09 12:05 ` Dave Martin
2017-08-09 12:05 ` [PATCH 23/27] arm64/sve: KVM: Hide SVE from CPU features exposed to guests Dave Martin
2017-08-15 16:37 ` Marc Zyngier
2017-08-16 10:54 ` Dave Martin
2017-08-16 11:10 ` Marc Zyngier
2017-08-16 11:22 ` Dave Martin
2017-08-09 12:05 ` [PATCH 24/27] arm64/sve: Detect SVE and activate runtime support Dave Martin
2017-08-16 17:53 ` Suzuki K Poulose
2017-08-17 10:00 ` Dave Martin
2017-08-17 10:00 ` Dave Martin
2017-08-09 12:05 ` [PATCH 25/27] arm64/sve: Add documentation Dave Martin
2017-08-09 12:05 ` [RFC PATCH 26/27] arm64: signal: Report signal frame size to userspace via auxv Dave Martin
2017-08-09 12:05 ` [RFC PATCH 27/27] arm64/sve: signal: Include SVE when computing AT_MINSIGSTKSZ Dave Martin
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