Struct enarx_shim_kvm::allocator::EnarxAllocator

pub struct EnarxAllocator { /* private fields */ }

The allocator

The allocator struct is holding a linked list Heap allocator and information about the hypervisor’s capabilities to extend the available memory.

It also implements:

• paging::FrameAllocator
• paging::FrameAllocator

Implementations

impl EnarxAllocator

pub fn allocate_and_map_memory(
    &mut self,
    map_to: VirtAddr,
    size: usize,
    flags: PageTableFlags,
    parent_flags: PageTableFlags
) -> Result<&'static mut [u8], AllocateError>

Allocate memory and map it to the given virtual address

pub fn map_memory(
    &mut self,
    map_from: PhysAddr,
    map_to: VirtAddr,
    size: usize,
    flags: PageTableFlags,
    parent_flags: PageTableFlags
) -> Result<(), AllocateError>

Map physical memory to the given virtual address

FIXME: change PhysAddr to ShimPhysAddr to ensure encrypted memory

pub fn unmap_memory(
    &mut self,
    virt_addr: VirtAddr,
    size: usize
) -> Result<(), UnmapError>

FIXME: unmap

pub fn try_alloc(&mut self, layout: Layout) -> Option<NonNull<u8>>

Allocate memory by Layout

pub unsafe fn deallocate(&mut self, ptr: *mut u8, layout: Layout)

Deallocate memory

Safety

Unsafe, because the caller has to ensure to not use any references left.

pub fn free(&self) -> usize

returns the amount of free memory

Trait Implementations

impl Debug for EnarxAllocator

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl FrameAllocator<Size1GiB> for EnarxAllocator

fn allocate_frame(&mut self) -> Option<PhysFrame<Size1GiB>>

Allocate a frame of the appropriate size and return it if possible.

impl FrameAllocator<Size2MiB> for EnarxAllocator

fn allocate_frame(&mut self) -> Option<PhysFrame<Size2MiB>>

Allocate a frame of the appropriate size and return it if possible.

impl FrameAllocator<Size4KiB> for EnarxAllocator

fn allocate_frame(&mut self) -> Option<PhysFrame<Size4KiB>>

Allocate a frame of the appropriate size and return it if possible.