ACK: [SRU][R][PATCH 0/3] Fix for storage corruption on 64 bit DMA on AMD platforms

[Ivan Hu]

Acked-by: Ivan Hu <ivan.hu at canonical.com>

On Tue, Sep 29, 2026 at 2:36 PM Yo-Jung Leo Lin (AMD) via kernel-team <
kernel-team at lists.ubuntu.com> wrote:

> BugLink: https://bugs.launchpad.net/bugs/2166838
>
> [ Impact ]
>
> We found a issue where if our BIOS enables certain enhanced features for
> PCIe atomics for PCI root port on a system where some devices don't
> support, it leads to malfunction on some of those devices.
>
> Currently this manifests as storage corruption on PCIe-connected SATA
> storage, but potentially can lead to more general PCIe device issues.
>
> [ Fix ]
>
> Cherry-pick a quirk for AMD platforms from this patcheset:
>
> - Fix for storage corruption w/ AMD IOMMU on 64-bit addressing[1]
>
> They can be found in following commits:
>
> 1. 4fde4482 (mainline) x86/PCI: Disable enhanced atomics on AMD NBIO 7.7
> and 7.11
> 2. 6b28e0e7 (linux-next) Revert "ata: ahci: force 32-bit DMA for JMicron
> JMB582/JMB585"
>
> And a dependent patch to make these 2 apply cleanly:
>
> 1. 21e7b971 (mainline) ata: Use named initializers for pci_device_id arrays
>
> This dependent patch simply cosmetic (e.g. replace struct initialization
> with designated initializer) and functionally should make no difference
> before and after.
>
> [ Test plan ]
>
> Install the kernel with the said fix, and run workload on the PCIe storage
> to deplete 32bit DMA address for the given storage. When the PCIe The
> storage start using 64 bit DMA address, content of that storage shouldn't
> be corrupted.
>
> [ Where problems could occur ]
>
> The quirk is AMD-specific. This disables certain enhancement feature on
> PHX/HPT/STX/KRK/STXH platforms. Normal PCIe AtomicOp should not get
> impacted.
>
> Although this is more of a BIOS issue, it's unlikely to get BIOS update
> for all those platforms in the field. So adding a quirk in kernel would
> help mitigate that.
>
> [ Additional Information ]
>
> [1]
> https://lore.kernel.org/linux-ide/20260908190600.226485-1-mario.limonciello@amd.com/
>
> Mario Limonciello (2):
>   x86/PCI: Disable enhanced atomics on AMD NBIO 7.7 and 7.11
>   Revert "ata: ahci: force 32-bit DMA for JMicron JMB582/JMB585"
>
> Uwe Kleine-König (The Capable Hub) (1):
>   ata: Use named initializers for pci_device_id arrays
>
>  arch/x86/pci/fixup.c            |   99 ++
>  drivers/ata/acard-ahci.c        |    8 +-
>  drivers/ata/ahci.c              | 1634 ++++++++++++++++++++++++-------
>  drivers/ata/ata_piix.c          |  532 ++++++----
>  drivers/ata/pata_acpi.c         |    5 +-
>  drivers/ata/pata_amd.c          |   88 +-
>  drivers/ata/pata_artop.c        |   11 +-
>  drivers/ata/pata_cmd64x.c       |   11 +-
>  drivers/ata/pata_opti.c         |    7 +-
>  drivers/ata/pata_pdc2027x.c     |   30 +-
>  drivers/ata/pata_pdc202xx_old.c |   13 +-
>  drivers/ata/pata_serverworks.c  |   24 +-
>  drivers/ata/pata_sis.c          |    1 -
>  drivers/ata/pata_via.c          |   19 +-
>  drivers/ata/pdc_adma.c          |    3 +-
>  drivers/ata/sata_mv.c           |   34 +-
>  drivers/ata/sata_nv.c           |   58 +-
>  drivers/ata/sata_promise.c      |   38 +-
>  drivers/ata/sata_qstor.c        |    3 +-
>  drivers/ata/sata_sil.c          |   15 +-
>  drivers/ata/sata_sil24.c        |   15 +-
>  drivers/ata/sata_sis.c          |   32 +-
>  drivers/ata/sata_svw.c          |   15 +-
>  drivers/ata/sata_sx4.c          |    3 +-
>  drivers/ata/sata_uli.c          |    7 +-
>  drivers/ata/sata_via.c          |   38 +-
>  26 files changed, 2028 insertions(+), 715 deletions(-)
>
> --
> 2.43.0
>
>
> --
> kernel-team mailing list
> kernel-team at lists.ubuntu.com
> https://lists.ubuntu.com/mailman/listinfo/kernel-team
>
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