linux-kernel - Re: [PATCH RESEND] PCI: Add function 1 DMA alias quirk for Marvell 88SE9235

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Date:   Thu, 8 Jun 2023 12:19:32 -0500
From:   Bjorn Helgaas <helgaas@...nel.org>
To:     Robin Murphy <robin.murphy@....com>
Cc:     bhelgaas@...gle.com, linux-pci@...r.kernel.org,
        linux-kernel@...r.kernel.org, iommu@...ts.linux.dev,
        hch@...radead.org, stable@...r.kernel.org,
        Jason Adriaanse <jason_a69@...oo.co.uk>
Subject: Re: [PATCH RESEND] PCI: Add function 1 DMA alias quirk for Marvell
 88SE9235

On Wed, Jun 07, 2023 at 06:18:47PM +0100, Robin Murphy wrote:
> Marvell's own product brief implies the 92xx series are a closely
> related family, and sure enough it turns out that 9235 seems to need the
> same quirk as the other three, although possibly only when certain ports
> are used.
> 
> CC: stable@...r.kernel.org
> Reported-by: Jason Adriaanse <jason_a69@...oo.co.uk>
> Link: https://lore.kernel.org/linux-iommu/2a699a99-545c-1324-e052-7d2f41fed1ae@yahoo.co.uk/
> Signed-off-by: Robin Murphy <robin.murphy@....com>

Applied with Christoph's reviewed-by to pci/virtualization for v6.5,
thanks!

> ---
> 
> Note that the actual regression which started the thread is a different
> matter, wherein a particular combination of parameters which used to put
> intel-iommu into passthrough mode now enables full translation instead.
> 
> Take #2, hopefully not royally screwing up my email alises this time.
> Sorry about that...
> 
>  drivers/pci/quirks.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
> index f4e2a88729fd..3186f2c84eab 100644
> --- a/drivers/pci/quirks.c
> +++ b/drivers/pci/quirks.c
> @@ -4174,6 +4174,8 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_MARVELL_EXT, 0x9220,
>  /* https://bugzilla.kernel.org/show_bug.cgi?id=42679#c49 */
>  DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_MARVELL_EXT, 0x9230,
>  			 quirk_dma_func1_alias);
> +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_MARVELL_EXT, 0x9235,
> +			 quirk_dma_func1_alias);
>  DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_TTI, 0x0642,
>  			 quirk_dma_func1_alias);
>  DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_TTI, 0x0645,
> -- 
> 2.39.2.101.g768bb238c484.dirty
>