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 E7D55340400; Mon, 21 Sep 2026 04:52:10 +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=1789966332; cv=none; b=DY285WHHovB5fYimJJdpbcnt/67EnLtXxLG7ELiSdikRXUMwNMpx6iLKoOrAeqiedPPg06vkvu/dTAcVfyJtOPW2B3szCW83Dq7Rk1uTSlv8TDw3AcePm7F0Kgi3yZrPdQy4/Zw4YONN6vcfIgtESAxNsexI5NB/icRYGECzFmk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789966332; c=relaxed/simple; bh=bTqmrvpUXlA1mQVCiLQ2/VKxw52s1dgUdWL4gFNXhXk=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=P8dRMYV23iUlE+m70lLOhYfTdLyrTo9lQpASy2DeC3VKlwymrr5ki/pSxRCN8TKggXAVMPiiKKUJityOmR6psUfbX32QEKiIlkGE1jUNF4pdYcmftjlvIm8ktDnzdQJBw2H4uQhC4mU443VmbW2vNT6gnyyp91p4oWo1mzmCwTo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=F+COzuW7; 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="F+COzuW7" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6ADA61F000FF; Mon, 21 Sep 2026 04:52:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789966330; bh=MVet7qYLYYdgVfZXBN8sKyK1xnl2RfzVXflZkC/ZMYA=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=F+COzuW7/pACggwXYD5vef5yxInElwke2g5sdSnQVO+NknSy7RyK3/+CRZCV4VwEy 5d4FduQKxn32lrhko804uUa3dRF0yl5qyVgvIpmytzKkKZAvJ1o3+8S1Y3x4/W7ssM elFGsxyvtL9sWmliVhOodjUfhQYCiZVnAkW4Nz7CIC3weke8FuSNUbwP4ghLoRnAKq OSziOK3ezK6tdUKiERfpz+Qk4jzvv6KP7o6XQBKdWYEjqFKgrpD+//db6CPHGu0ujp jA0VA5TWrk78R53PvghofnOruuNZ7v1wllhePj88XcXMtC1ctonkid2FEICjUmtfh4 uuPfgj/ZwkAKQ== Message-ID: <15cebf13-1e28-40e1-9113-19205ee8d604@kernel.org> Date: Sun, 20 Sep 2026 23:52:08 -0500 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 0/2] Fix for storage corruption w/ AMD IOMMU on 64-bit addressing To: Mario Limonciello , Bjorn Helgaas , Damien Le Moal , Niklas Cassel Cc: Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , "maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)" , "H . Peter Anvin" , "open list:PCI SUBSYSTEM" , "open list:X86 ARCHITECTURE (32-BIT AND 64-BIT)" , "open list:LIBATA SUBSYSTEM (Serial and Parallel ATA drivers)" References: <20260908190600.226485-1-mario.limonciello@amd.com> Content-Language: en-US From: Mario Limonciello In-Reply-To: <20260908190600.226485-1-mario.limonciello@amd.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 9/8/26 2:05 PM, Mario Limonciello wrote: > An issue has been reported by a number of people that corruption > was occurring on storage for desktop systems. It's notably reported > on SATA, but the same issue also appears on NVME. > > At a glance it looks like an IOMMU issue as turning off the IOMMU helps > the issue, but it's actually a problem that occurs specifically with any > IOVA addressed >58 bits. > > This is because the BIOS on these systems is enabling a feature of the > root port called 'enhanced atomics' which repurposes those upper 5 bits > of address space. That feature should only be enabled by the BIOS when > the partner device supports it, but it's instead needlessly enabled on a > number of root ports. > > As some of these systems probably won't receive BIOS updates and there is > active reports of data corruption root caused to this add a quirk to > disable it on affected models, and also remove the quirk that was > introduced to work around this issue in drivers/ata. > > v2: > * Added resume fixups for the affected AMD PCIe ports > > Mario Limonciello (2): > x86/PCI: Disable enhanced atomics on some AMD PCIe ports > Revert "ata: ahci: force 32-bit DMA for JMicron JMB582/JMB585" > > arch/x86/pci/fixup.c | 99 ++++++++++++++++++++++++++++++++++++++++++++ > drivers/ata/ahci.c | 18 -------- > 2 files changed, 99 insertions(+), 18 deletions(-) > Gentle ping on this series.