Messages in this thread | | | Date | Fri, 20 Jan 2023 08:27:08 +0800 | Subject | Re: [PATCH 6/8] iommu: Retire bus ops | From | Baolu Lu <> |
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On 2023/1/20 3:18, Robin Murphy wrote: > + /* > + * For FDT-based systems and ACPI IORT/VIOT, drivers register IOMMU > + * instances with non-NULL fwnodes, and client devices should have been > + * identified with a fwspec by this point. For Intel/AMD/s390/PAMU we > + * can assume a single active driver with global ops, and so grab those > + * from any registered instance, cheekily co-opting the same mechanism. > + */ > + fwspec = dev_iommu_fwspec_get(dev); > + if (fwspec && fwspec->ops) > + ops = fwspec->ops; > + else > + ops = iommu_ops_from_fwnode(NULL);
I'm imagining if Intel/AMD/s390 drivers need to give up global ops. Is there any way to allow them to make such conversion? I am just thinking about whether this is a hard limitation for these drivers.
Best regards, baolu
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