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memory/iommu: introduce IOMMUMemoryRegionClass

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This finishes QOM'fication of IOMMUMemoryRegion by introducing
a IOMMUMemoryRegionClass. This also provides a fastpath analog for
IOMMU_MEMORY_REGION_GET_CLASS().

This makes IOMMUMemoryRegion an abstract class.

Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Message-Id: <20170711035620.4232-3-aik@ozlabs.ru>
Acked-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Alexey Kardashevskiy 2017-07-11 13:56:20 +10:00 • committed by Paolo Bonzini
parent 3df9d74806
commit 1221a47467
15 changed files with 205 additions and 70 deletions
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6
exec.c
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@ -481,6 +481,7 @@ static MemoryRegionSection address_space_do_translate(AddressSpace *as,
IOMMUTLBEntry iotlb;
MemoryRegionSection *section;
IOMMUMemoryRegion *iommu_mr;
IOMMUMemoryRegionClass *imrc;
for (;;) {
AddressSpaceDispatch *d = atomic_rcu_read(&as->dispatch);
@ -490,9 +491,10 @@ static MemoryRegionSection address_space_do_translate(AddressSpace *as,
if (!iommu_mr) {
break;
}
imrc = memory_region_get_iommu_class_nocheck(iommu_mr);
iotlb = iommu_mr->iommu_ops->translate(iommu_mr, addr, is_write ?
IOMMU_WO : IOMMU_RO);
iotlb = imrc->translate(iommu_mr, addr, is_write ?
IOMMU_WO : IOMMU_RO);
addr = ((iotlb.translated_addr & ~iotlb.addr_mask)
| (addr & iotlb.addr_mask));
*plen = MIN(*plen, (addr | iotlb.addr_mask) - addr + 1);