Re: [PATCH v2 1/2] x86/PCI: Disable enhanced atomics on some AMD PCIe ports

[sashiko-bot@kernel.org]

> There have been multiple reports of data corruption that can occur
> with 64-bit DMA when the IOMMU is enabled. This occurs due to some
> BIOSes enabling enhanced atomic operations on PCIe ports.
> 
> When enhanced atomic operations are enabled on PCIe ports for some
> models, data corruption occurs when the 32-bit IOVA space is exhausted.
> The problem is reported on storage devices, but can affect any device
> that uses 64 bit DMA.
> 
> Disable enhanced atomics using SMN for NBIO 7.7 and 7.11 based models.
> 
> Cc: david.laight.linux@gmail.com
> Cc: John Smith <imjohnsmith4000@gmail.com>
> Cc: Lennert Buytenhek <kernel@wantstofly.org>
> Cc: Niklas Cassel <cassel@kernel.org>
> Cc: Roland Waltersson <roland.waltersson@netinsight.net>
> Reported-by: Mikael Etienne <mikael1022bzh@gmail.com>
> Closes: https://lore.kernel.org/all/178789300872.392066.15963676631650361573@gmail.com/
> Reported-by: Arthur Husband <artmoty@gmail.com>
> Closes: https://lore.kernel.org/linux-ide/20260406222335.379935-1-artmoty@gmail.com/
> Reported-by: Alvin Lim <alvinwylim@gmail.com>
> Closes: https://lore.kernel.org/linux-ide/20260621100844.1224301-1-alvinwylim@gmail.com/
> Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>

Sashiko has reviewed this patch and found no issues. It looks great!

-- 
Sashiko AI review · https://sashiko.dev/#/patchset/20260908190600.226485-1-mario.limonciello@amd.com?part=1