Struct HvCall

pub struct HvCall {
    initialized: bool,
    vtl: Vtl,
    tdx_io_page: Option<TdxHypercallPage>,
}

Provides mechanisms to invoke hypercalls within the boot shim. Internally uses static buffers for the hypercall page, the input page, and the output page, so this should not be used in any multi-threaded capacity (which the boot shim currently is not).

Fields

initialized: bool

vtl: Vtl

tdx_io_page: Option<TdxHypercallPage>

Implementations

impl HvCall

fn input_page() -> &'static mut HvcallPage

fn output_page() -> &'static mut HvcallPage

pub fn hypercall_page(&mut self) -> u64

Returns the address of the hypercall page, mapping it first if necessary.

fn init_if_needed(&mut self)

pub fn initialize(&mut self)

Hypercall initialization.

pub fn uninitialize(&mut self)

Call before jumping to kernel.

pub fn vtl(&mut self) -> Vtl

Returns the environment’s VTL.

fn dispatch_hvcall( &mut self, code: HypercallCode, rep_count: Option<usize>, ) -> HypercallOutput

Makes a hypercall. rep_count is Some for rep hypercalls

pub fn set_register( &mut self, name: HvRegisterName, value: HvRegisterValue, ) -> Result<(), HvError>

Hypercall for setting a register to a value.

pub fn get_register( &mut self, name: HvRegisterName, ) -> Result<HvRegisterValue, HvError>

Hypercall for setting a register to a value.

pub fn apply_vtl2_protections( &mut self, range: MemoryRange, ) -> Result<(), HvError>

Hypercall to apply vtl protections to the pages from address start to end

pub fn accept_vtl2_pages( &mut self, range: MemoryRange, memory_type: AcceptMemoryType, ) -> Result<(), HvError>

Hypercall to accept vtl2 pages from address start to end with VTL 2 protections and no host visibility

pub fn get_vp_index_from_hw_id<const N: usize>( &mut self, hw_ids: &[u32], output: &mut ArrayVec<u32, N>, ) -> Result<(), HvError>

Get the corresponding VP indices from a list of VP hardware IDs (APIC IDs on x64, MPIDR on ARM64).

This always queries VTL0, since the hardware IDs are the same across the VTLs in practice, and the hypercall only succeeds for VTL2 once VTL2 has been enabled (which it might not be at this point).

impl HvCall

pub fn initialize_tdx(&mut self, tdx_io_page: TdxHypercallPage)

Initialize HvCall for use in a TDX CVM

pub fn uninitialize_tdx(&mut self)

Uninitialize HvCall for TDX, unshare IO pages with the hypervisor

pub fn tdx_enable_vp_vtl2(&mut self, vp_index: u32) -> Result<(), HvError>

Hypercall to enable VTL2 on a TDX VP

pub fn tdx_start_vp(&mut self, vp_index: u32) -> Result<(), HvError>

Hypercall to start VP on TDX