linux-kernel - Re: [PATCH] nvme: Enable acceleration feature of A64FX processor

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Message-ID: <20190201155120.GA5180@lst.de>
Date:   Fri, 1 Feb 2019 16:51:20 +0100
From:   Christoph Hellwig <hch@....de>
To:     Takao Indoh <indou.takao@...fujitsu.com>
Cc:     keith.busch@...el.com, axboe@...com, hch@....de, sagi@...mberg.me,
        linux-nvme@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Takao Indoh <indou.takao@...itsu.com>
Subject: Re: [PATCH] nvme: Enable acceleration feature of A64FX processor

On Fri, Feb 01, 2019 at 09:46:15PM +0900, Takao Indoh wrote:
> From: Takao Indoh <indou.takao@...itsu.com>
> 
> Fujitsu A64FX processor has a feature to accelerate data transfer of
> internal bus by relaxed ordering. It is enabled when the bit 56 of dma
> address is set to 1.
> 
> This patch introduces this acceleration feature to the NVMe driver to
> enhance NVMe device performance.

This has absolutely no business in a PCIe driver, sorry.