linux-kernel - Re: [PATCH] nvme: Add support for Apple 2018+ models

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Message-ID: <20190715122953.GB3937@lst.de>
Date:   Mon, 15 Jul 2019 14:29:53 +0200
From:   Christoph Hellwig <hch@....de>
To:     Maxim Levitsky <mlevitsk@...hat.com>
Cc:     Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Christoph Hellwig <hch@....de>,
        Keith Busch <kbusch@...nel.org>, Jens Axboe <axboe@...com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        linux-nvme@...ts.infradead.org, Paul Pawlowski <paul@...rm.io>
Subject: Re: [PATCH] nvme: Add support for Apple 2018+ models

On Mon, Jul 15, 2019 at 12:28:05PM +0300, Maxim Levitsky wrote:
> 
> To be honest, the spec explicitly states that minimum submission queue entry size is 64 
> and minimum completion entry size should be is 16 bytes for NVM command set:

That doesn't keep Apple from implementing whatever they want and soldering
that down on their MacBook mainboards unfortunately :(