From: Catalin Marinas <catalin.marinas@arm.com>
To: Dave Martin <Dave.Martin@arm.com>
Cc: linux-arm-kernel@lists.infradead.org,
"Will Deacon" <will.deacon@arm.com>,
"Ard Biesheuvel" <ard.biesheuvel@linaro.org>,
"Alex Bennée" <alex.bennee@linaro.org>,
"Szabolcs Nagy" <szabolcs.nagy@arm.com>,
"Richard Sandiford" <richard.sandiford@arm.com>,
kvmarm@lists.cs.columbia.edu, libc-alpha@sourceware.org,
linux-arch@vger.kernel.org, gdb@sourceware.org,
"Alan Hayward" <alan.hayward@arm.com>, "Yao Qi" <Yao.Qi@arm.com>
Subject: Re: [PATCH v2 14/28] arm64/sve: Backend logic for setting the vector length
Date: Wed, 13 Sep 2017 17:29:00 -0000 [thread overview]
Message-ID: <20170913172911.3ca2h6cpju7etifi@localhost> (raw)
In-Reply-To: <1504198860-12951-15-git-send-email-Dave.Martin@arm.com>
On Thu, Aug 31, 2017 at 06:00:46PM +0100, Dave P Martin wrote:
> This patch implements the core logic for changing a task's vector
> length on request from userspace. This will be used by the ptrace
> and prctl frontends that are implemented in later patches.
>
> The SVE architecture permits, but does not require, implementations
> to support vector lengths that are not a power of two. To handle
> this, logic is added to check a requested vector length against a
> possibly sparse bitmap of available vector lengths at runtime, so
> that the best supported value can be chosen.
>
> Signed-off-by: Dave Martin <Dave.Martin@arm.com>
> Cc: Alex Bennée <alex.bennee@linaro.org>
Can this be merged with patch 20? It seems to add the PR_ definitions
which get actually used later when the prctl interface is added.
--
Catalin
next prev parent reply other threads:[~2017-09-13 17:29 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1504198860-12951-1-git-send-email-Dave.Martin@arm.com>
2017-08-31 17:01 ` [PATCH v2 09/28] arm64/sve: Signal frame and context structure definition Dave Martin
2017-09-13 13:36 ` Catalin Marinas
2017-09-13 21:33 ` Dave Martin
2017-08-31 17:02 ` [PATCH v2 19/28] arm64/sve: ptrace and ELF coredump support Dave Martin
2017-09-06 16:22 ` Okamoto, Takayuki
[not found] ` <20170906181634.GF6321@e103592.cambridge.arm.com>
2017-09-07 5:11 ` Okamoto, Takayuki
2017-09-08 13:11 ` Dave Martin
2017-09-14 12:57 ` Alex Bennée
2017-09-28 14:57 ` Dave Martin
2017-09-29 12:46 ` Dave Martin
2017-08-31 17:09 ` [PATCH v2 14/28] arm64/sve: Backend logic for setting the vector length Dave Martin
2017-09-13 17:29 ` Catalin Marinas [this message]
2017-09-13 19:06 ` Dave Martin
2017-09-13 22:11 ` Catalin Marinas
2017-10-05 16:42 ` Dave Martin
2017-10-05 16:53 ` Catalin Marinas
2017-10-05 17:04 ` Dave Martin
2017-09-20 11:00 ` Alan Hayward
[not found] ` <20170920110902.GG24231@e103592.cambridge.arm.com>
2017-09-20 18:08 ` Alan Hayward
2017-09-21 11:19 ` Dave Martin
2017-09-21 11:57 ` Alan Hayward
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