From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 71FE4598C09; Tue, 8 Sep 2026 19:17:34 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788895055; cv=none; b=jzg3OmXuKVNMQdV7XdS+NyS5KpaGjvLKhqfHfV1LfBW4X7cA2tMxcAU5sJa1+UZHl4VmsrSNIBs19rmi8perogXh1JWPCc9J8INtugkVSe1XKo/NYvHDOfFE/KvFriOp2cIDN98kj+5oeg7Mgv8N/d1bfnx6m/tuivX6a2U/UpY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788895055; c=relaxed/simple; bh=9QkntcPPUEwY/jW/GjtPbqLai0VmW6YmWvMHnF6n4Ko=; h=From:Subject:To:Cc:In-Reply-To:References:Content-Type:Date: Message-Id; b=dAEcNCNemz/3M0tyO8WwxJxO+fe7LfWfkNsnX2UEgprDZEvWOG6RrN+Tei79FousQgUsV8MkXFzUscji/R8vLFRIOUUnFy9CHwWvQUV7icnTYF2T9jRVSAsBWxd4eOLwomt/nHv21d3PcP/5uneWhCagXHARdH8F6I5b8QU6TBA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=O33Tkxty; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="O33Tkxty" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C4A981F00A3A; Tue, 8 Sep 2026 19:17:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1788895054; bh=9QkntcPPUEwY/jW/GjtPbqLai0VmW6YmWvMHnF6n4Ko=; h=From:Subject:Reply-To:To:Cc:In-Reply-To:References:Date; b=O33Tkxty9su/6V4Mv6eCK6lia+nVVc5oygA4da/ajscoKGQzoAs+6z5Hf3D9v94D2 IAX6rFJziXGCgpYMxg3g7eyN8DYxB2CuJEHgLd6Yc/eh4mwb5hMhPmdlxRrkYK+6E9 6H3tmT8k4ilOVWT4sdVdsc+OqeO4nGWrVDaYb0kxqpa9LVEwWdfKKEpzKyrRwITeV/ mmA4YPBXVVnxszY8taoXnerWa2BdYB9/xKN3KapW4wsaQS5m1ulrO+PG0m5/31EALs A/3fA7f1rA143q0cjq4ihs8bM6bcnmNczYoOPggnEfB3KXFjG34F6tEdZXP0FSB3iA srO0UHQWN+MJg== From: sashiko-bot@kernel.org Subject: Re: [PATCH v2 1/2] x86/PCI: Disable enhanced atomics on some AMD PCIe ports Reply-To: sashiko-reviews@lists.linux.dev To: "Mario Limonciello" Cc: linux-pci@vger.kernel.org, cassel@kernel.org, linux-ide@vger.kernel.org, dlemoal@kernel.org In-Reply-To: <20260908190600.226485-2-mario.limonciello@amd.com> References: <20260908190600.226485-1-mario.limonciello@amd.com> <20260908190600.226485-2-mario.limonciello@amd.com> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Date: Tue, 08 Sep 2026 19:17:33 +0000 Message-Id: <20260908191733.C4A981F00A3A@smtp.kernel.org> Precedence: bulk X-Mailing-List: linux-pci@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: > 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. >=20 > 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. >=20 > Disable enhanced atomics using SMN for NBIO 7.7 and 7.11 based models. >=20 > Cc: david.laight.linux@gmail.com > Cc: John Smith > Cc: Lennert Buytenhek > Cc: Niklas Cassel > Cc: Roland Waltersson > Reported-by: Mikael Etienne > Closes: https://lore.kernel.org/all/178789300872.392066.15963676631650361= 573@gmail.com/ > Reported-by: Arthur Husband > Closes: https://lore.kernel.org/linux-ide/20260406222335.379935-1-artmoty= @gmail.com/ > Reported-by: Alvin Lim > Closes: https://lore.kernel.org/linux-ide/20260621100844.1224301-1-alvinw= ylim@gmail.com/ > Signed-off-by: Mario Limonciello Sashiko has reviewed this patch and found no issues. It looks great! --=20 Sashiko AI review =C2=B7 https://sashiko.dev/#/patchset/20260908190600.2264= 85-1-mario.limonciello@amd.com?part=3D1