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memory: add memory_region_is_mapped() API

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which allows to check if MemoryRegion is already mapped.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Igor Mammedov 2014-06-02 15:25:06 +02:00 committed by Michael S. Tsirkin
parent 10b7e74bf2
commit eed2bacfd2
2 changed files with 17 additions and 1 deletions
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8
include/exec/memory.h
View File

@ -847,6 +847,14 @@ void memory_region_set_alias_offset(MemoryRegion *mr,
*/ */
bool memory_region_present(MemoryRegion *container, hwaddr addr); bool memory_region_present(MemoryRegion *container, hwaddr addr);
/**
* memory_region_is_mapped: returns true if #MemoryRegion is mapped
* into any address space.
*
* @mr: a #MemoryRegion which should be checked if it's mapped
*/
bool memory_region_is_mapped(MemoryRegion *mr);
/** /**
* memory_region_find: translate an address/size relative to a * memory_region_find: translate an address/size relative to a
* MemoryRegion into a #MemoryRegionSection. * MemoryRegion into a #MemoryRegionSection.

10
memory.c
View File

@ -493,7 +493,7 @@ static AddressSpace *memory_region_to_address_space(MemoryRegion *mr)
return as; return as;
} }
} }
abort(); return NULL;
} }
/* Render a memory region into the global view. Ranges in @view obscure /* Render a memory region into the global view. Ranges in @view obscure
@ -1593,6 +1593,11 @@ bool memory_region_present(MemoryRegion *container, hwaddr addr)
return true; return true;
} }
bool memory_region_is_mapped(MemoryRegion *mr)
{
return mr->container ? true : false;
}
MemoryRegionSection memory_region_find(MemoryRegion *mr, MemoryRegionSection memory_region_find(MemoryRegion *mr,
hwaddr addr, uint64_t size) hwaddr addr, uint64_t size)
{ {
@ -1610,6 +1615,9 @@ MemoryRegionSection memory_region_find(MemoryRegion *mr,
} }
as = memory_region_to_address_space(root); as = memory_region_to_address_space(root);
if (!as) {
return ret;
}
range = addrrange_make(int128_make64(addr), int128_make64(size)); range = addrrange_make(int128_make64(addr), int128_make64(size));
view = address_space_get_flatview(as); view = address_space_get_flatview(as);