linux-kernel - Re: nvme: IO_PAGE_FAULT logged with Intel SSDPEKKF512G8

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Message-ID: <YfgC8H/EJRLRpgES@8bytes.org>
Date:   Mon, 31 Jan 2022 16:40:32 +0100
From:   Jörg Rödel <joro@...tes.org>
To:     Paul Menzel <pmenzel@...gen.mpg.de>
Cc:     Keith Busch <kbusch@...nel.org>, Jens Axboe <axboe@...nel.dk>,
        Christoph Hellwig <hch@...radead.org>,
        Sagi Grimberg <sagi@...mberg.me>,
        linux-nvme@...ts.infradead.org, iommu@...ts.linux-foundation.org,
        LKML <linux-kernel@...r.kernel.org>,
        Suravee Suthikulpanit <suravee.suthikulpanit@....com>
Subject: Re: nvme: IO_PAGE_FAULT logged with Intel SSDPEKKF512G8

On Tue, Jan 18, 2022 at 06:01:06PM +0100, Paul Menzel wrote:
> > >      $ dmesg --level=err
> > >      [    4.194306] nvme 0000:01:00.0: AMD-Vi: Event logged [IO_PAGE_FAULT domain=0x000c address=0xffffc080 flags=0x0050]
> > >      [    4.206970] nvme 0000:01:00.0: AMD-Vi: Event logged [IO_PAGE_FAULT domain=0x000c address=0xffffc000 flags=0x0050]

This was caused by a DMA read to a write-only page. Looks like a bug in
the driver or the devices firmware.

Regards,

	Joerg