Module vm_address_region 

Structs

MapResult

Result of calling VmAddressRegion::create_vm_mapping.

VmAddressRegion

A contiguous region of the virtual address space.

Enums

MemoryPriority

Memory priorities that can be applied to VMARs and mappings.

VmAddressRegionOpChildren

Whether to operate on children when unmapping or protecting.

Constants

VMAR_CAN_RWX_FLAGS

Mask of read, write, and execute permission flags.

VMAR_FLAG_ALLOW_FAULTS

Allow VMO backings that could result in faults.

VMAR_FLAG_CAN_MAP_EXECUTE

Allow VmMappings to be created inside the region with execute permissions.

VMAR_FLAG_CAN_MAP_READ

Allow VmMappings to be created inside the region with read permissions.

VMAR_FLAG_CAN_MAP_SPECIFIC

Allow VmMappings to be created inside the new region with the SPECIFIC or OFFSET_IS_UPPER_LIMIT flag.

VMAR_FLAG_CAN_MAP_WRITE

Allow VmMappings to be created inside the region with write permissions.

VMAR_FLAG_COMPACT

When randomly allocating subregions, reduce sprawl by placing allocations near each other.

VMAR_FLAG_DEBUG_DYNAMIC_KERNEL_MAPPING

Opt this VMAR out of certain debugging checks.

VMAR_FLAG_FAULT_BEYOND_STREAM_SIZE

Memory accesses past the stream size rounded up to the page boundary will fault.

VMAR_FLAG_OFFSET_IS_UPPER_LIMIT

Treat the offset as an upper limit when allocating a VMO or child VMAR.

VMAR_FLAG_REQUIRE_NON_RESIZABLE

Require that VMO backing the mapping is non-resizable.

VMAR_FLAG_SPECIFIC

Request that the new region be at the specified offset in its parent region.

VMAR_FLAG_SPECIFIC_OVERWRITE

Like VMAR_FLAG_SPECIFIC, but permits overwriting existing mappings.