On 23.07.2025 16:26, Stewart Hildebrand wrote: > On 7/23/25 06:18, Jan Beulich wrote: >> On 13.06.2025 17:17, Stewart Hildebrand wrote: >>> --- a/xen/arch/arm/Kconfig >>> +++ b/xen/arch/arm/Kconfig >>> @@ -8,6 +8,8 @@ config ARM_64 >>> depends on !ARM_32 >>> select 64BIT >>> select HAS_FAST_MULTIPLY >>> + select HAS_VPCI_GUEST_SUPPORT if PCI_PASSTHROUGH >>> + select HAS_PASSTHROUGH if PCI_PASSTHROUGH >> >> As I just learned, this change (or maybe it was the "select HAS_PCI" >> further down) has exposed the quarantining Kconfig option prompt, which >> (aiui) is entirely meaningless on Arm. IOW I think further adjustments >> are necessary. > > Not entirely meaningless - the choice between "none" and "basic" still > seems relevant. Just "scratch page" quarantining hasn't been implemented > in any of the Arm iommu drivers.
Is there support for "basic"? For x86, most of the involved code lives in the vendor-specific drivers, and I can't find anything related in Arm's. Note in particular the hook iommu_quarantine_dev_init() calls, which isn't provided by any of the Arm drivers afaict. Jan
