On Thu, 24 Jul 2025, Stewart Hildebrand wrote:
> All IOMMU_QUARANTINE_* options are exposed on Arm since 163c6b589879
> ("xen/arm: pci: introduce PCI_PASSTHROUGH Kconfig option"). However,
> only NONE and BASIC are implemented in any Arm iommu driver since
> 63919fc4d1ca ("xen/arm: smmuv3: Add PCI devices support for SMMUv3") and
> ca8f6ffeb6e3 ("xen/arm: smmuv2: Add PCI devices support for SMMUv2").
> SCRATCH_PAGE is not yet implemented in any Arm iommu driver. Restrict
> scratch page quarantining to x86 for now.
>
> Reported-by: Jan Beulich <jbeul...@suse.com>
> Signed-off-by: Stewart Hildebrand <stewart.hildebr...@amd.com>
Acked-by: Stefano Stabellini <sstabell...@kernel.org>
> ---
> Cc'ing Arm maintainers to request an Arm ack.
> ---
> xen/drivers/passthrough/Kconfig | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/xen/drivers/passthrough/Kconfig b/xen/drivers/passthrough/Kconfig
> index 78edd805365e..11aece5f7bda 100644
> --- a/xen/drivers/passthrough/Kconfig
> +++ b/xen/drivers/passthrough/Kconfig
> @@ -90,4 +90,5 @@ choice
> bool "basic"
> config IOMMU_QUARANTINE_SCRATCH_PAGE
> bool "scratch page"
> + depends on X86
> endchoice
>
> base-commit: 150b773a484c911e2926f65adb576e1cdf9de7cf
> --
> 2.50.1
>
