DMAR2IODOM

[br]

Summary

o Add DMAR2IODOM() macro;
o Add IODOM2DMAR() macro.

[kib]

Basically I want to get rid of all conversion relying on the layout. And add macros for common conversions e.g. from domain to dmar unit etc.

sys/x86/iommu/intel_ctx.c

181

Can you add CTX2DMARDOM ?

182

This expression should be macro-ified as well (domain->dmar unit)

sys/x86/iommu/intel_dmar.h

94

I want this to look like &((domain)->iodom), i.e. stop relying on the dmar_domain layout whre iodom is the first member.

95

And this would be __container_of((iodom), struct dmar_domain, iodom). Unless I mixed arg order.

[br]

Add macroses:

DMAR2IOMMU()
IOMMU2DMAR()

DOM2IODOM()
IODOM2DOM()

CTX2IOCTX()
IOCTX2CTX()

[kib]

sys/dev/iommu/iommu_gas.c

177

Commit these assert improvements for gas.c separately.

sys/x86/iommu/intel_ctx.c

339

Do we want a constructor and destructor for iommu_domain ? I believe it makes sense.