underhill_mem

Struct HardwareIsolatedMemoryProtector

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pub struct HardwareIsolatedMemoryProtector { /* private fields */ }
Expand description

An implementation of ProtectIsolatedMemory for Underhill VMs.

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impl HardwareIsolatedMemoryProtector

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pub fn new( shared: Arc<GuestMemoryMapping>, encrypted: Arc<GuestMemoryMapping>, layout: MemoryLayout, acceptor: Arc<MemoryAcceptor>, ) -> Self

Returns a new instance.

shared provides the mapping for shared memory. vtl0 provides the mapping for encrypted memory.

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impl ProtectIsolatedMemory for HardwareIsolatedMemoryProtector

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fn change_host_visibility( &self, shared: bool, gpns: &[u64], tlb_access: &mut dyn TlbFlushLockAccess, ) -> Result<(), (HvError, usize)>

Changes host visibility on guest memory.
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fn query_host_visibility( &self, gpns: &[u64], host_visibility: &mut [HostVisibilityType], ) -> Result<(), (HvError, usize)>

Queries host visibility on guest memory.
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fn default_vtl0_protections(&self) -> HvMapGpaFlags

Gets the default protections/permissions for VTL 0.
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fn change_default_vtl_protections( &self, vtl: GuestVtl, vtl_protections: HvMapGpaFlags, tlb_access: &mut dyn TlbFlushLockAccess, ) -> Result<(), HvError>

Changes the default protections/permissions for a VTL. For VBS-isolated VMs, the protections apply to all vtls lower than the specified one. For hardware-isolated VMs, they apply just to the given vtl.
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fn change_vtl_protections( &self, vtl: GuestVtl, gpns: &[u64], protections: HvMapGpaFlags, tlb_access: &mut dyn TlbFlushLockAccess, ) -> Result<(), (HvError, usize)>

Changes the vtl protections on a range of guest memory.
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fn change_hypercall_overlay( &self, vtl: GuestVtl, gpn: u64, tlb_access: &mut dyn TlbFlushLockAccess, )

Changes the overlay for the hypercall code page for a target VTL.
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fn disable_hypercall_overlay( &self, vtl: GuestVtl, tlb_access: &mut dyn TlbFlushLockAccess, )

Disables the overlay for the hypercall code page for a target VTL.
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fn set_vtl1_protections_enabled(&self)

Alerts the memory protector that vtl 1 is ready to set vtl protections on lower-vtl memory, and that these protections should be enforced.
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fn vtl1_protections_enabled(&self) -> bool

Whether VTL 1 is prepared to modify vtl protections on lower-vtl memory, and therefore whether these protections should be enforced.

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