From: Catalin Marinas <catalin.marinas@arm.com>
To: Qinxin Xia <xiaqinxin@huawei.com>
Cc: will@kernel.org, anshuman.khandual@arm.com, BenNiu@meta.com,
robin.murphy@arm.com, xiqi2@huawei.com,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, linuxarm@huawei.com,
wangzhou1@hisilicon.com, sunnanyong@huawei.com,
prime.zeng@hisilicon.com
Subject: Re: [PATCH] arm64: uaccess: Optimize copy_to/from_user with LSUI extension
Date: Fri, 7 Aug 2026 17:55:17 +0100 [thread overview]
Message-ID: <anYN9ei0W6FyClcF@arm.com> (raw)
In-Reply-To: <20260805035251.2813306-1-xiaqinxin@huawei.com>
On Wed, Aug 05, 2026 at 11:52:51AM +0800, Qinxin Xia wrote:
> Add support for the ARMv9.6/LSUI (Load/Store Unprivileged Immediate)
> extension to optimize copy_from_user operations. The implementation
> uses the alternative mechanism to select between the standard unprivileged
> load-pair sequence and the new ldtp/sttp instruction at runtime based on
> hardware capability.
That's all good but do you have any numbers to back the change up?
--
Catalin
prev parent reply other threads:[~2026-08-07 16:55 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-05 3:52 [PATCH] arm64: uaccess: Optimize copy_to/from_user with LSUI extension Qinxin Xia
2026-08-07 16:55 ` Catalin Marinas [this message]
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