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memory/iommu: QOM'fy IOMMU MemoryRegion

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This defines new QOM object - IOMMUMemoryRegion - with MemoryRegion
as a parent.

This moves IOMMU-related fields from MR to IOMMU MR. However to avoid
dymanic QOM casting in fast path (address_space_translate, etc),
this adds an @is_iommu boolean flag to MR and provides new helper to
do simple cast to IOMMU MR - memory_region_get_iommu. The flag
is set in the instance init callback. This defines
memory_region_is_iommu as memory_region_get_iommu()!=NULL.

This switches MemoryRegion to IOMMUMemoryRegion in most places except
the ones where MemoryRegion may be an alias.

Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Message-Id: <20170711035620.4232-2-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 13:56:19 +10:00 • committed by Paolo Bonzini
parent 98fab4c163
commit 3df9d74806
20 changed files with 170 additions and 109 deletions
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3
include/hw/ppc/spapr.h
View file

@ -594,7 +594,8 @@ struct sPAPRTCETable {
bool bypass;
bool need_vfio;
int fd;
MemoryRegion root, iommu;
MemoryRegion root;
IOMMUMemoryRegion iommu;
struct VIOsPAPRDevice *vdev; /* for @bypass migration compatibility only */
QLIST_ENTRY(sPAPRTCETable) list;
};