cloud-hypervisor/arch/src/aarch64/mod.rs
Michael Zhao 8f7dc73562 vmm: Move Vcpu::configure() to arch crate
Signed-off-by: Michael Zhao <michael.zhao@arm.com>
2020-06-03 11:27:29 +02:00

82 lines
2.6 KiB
Rust

// Copyright 2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
pub mod layout;
use crate::RegionType;
use kvm_ioctls::*;
use vm_memory::{GuestAddress, GuestMemoryAtomic, GuestMemoryMmap, GuestUsize};
#[derive(Debug)]
pub enum Error {}
impl From<Error> for super::Error {
fn from(e: Error) -> super::Error {
super::Error::AArch64Setup(e)
}
}
/// Stub function that needs to be implemented when aarch64 functionality is added.
pub fn arch_memory_regions(size: GuestUsize) -> Vec<(GuestAddress, usize, RegionType)> {
vec![(GuestAddress(0), size as usize, RegionType::Ram)]
}
#[derive(Debug, Copy, Clone)]
/// Specifies the entry point address where the guest must start
/// executing code.
pub struct EntryPoint {
/// Address in guest memory where the guest must start execution
pub entry_addr: GuestAddress,
}
pub fn configure_vcpu(
_fd: &VcpuFd,
_id: u8,
_kernel_entry_point: Option<EntryPoint>,
_vm_memory: &GuestMemoryAtomic<GuestMemoryMmap>,
) -> super::Result<()> {
unimplemented!();
}
/// Stub function that needs to be implemented when aarch64 functionality is added.
pub fn configure_system(
_guest_mem: &GuestMemoryMmap,
_cmdline_addr: GuestAddress,
_cmdline_size: usize,
_num_cpus: u8,
_rsdp_addr: Option<GuestAddress>,
) -> super::Result<()> {
Ok(())
}
/// Stub function that needs to be implemented when aarch64 functionality is added.
pub fn get_reserved_mem_addr() -> usize {
0
}
pub fn get_host_cpu_phys_bits() -> u8 {
// The value returned here is used to determine the physical address space size
// for a VM (IPA size).
// In recent kernel versions, the maxium IPA size supported by the host can be
// known by querying cap KVM_CAP_ARM_VM_IPA_SIZE. And the IPA size for a
// guest can be configured smaller.
// But in Cloud-Hypervisor we simply use the maxium value for the VM.
// Reference https://lwn.net/Articles/766767/.
//
// The correct way to query KVM_CAP_ARM_VM_IPA_SIZE is via rust-vmm/kvm-ioctls,
// which wraps all IOCTL's and provides easy interface to user hypervisors.
// For now the cap hasn't been supported. A separate patch will be submitted to
// rust-vmm to add it.
// So a hardcoded value is used here as a temporary solution.
// It will be replace once rust-vmm/kvm-ioctls is ready.
//
40
}
pub fn check_required_kvm_extensions(kvm: &Kvm) -> super::Result<()> {
if !kvm.check_extension(Cap::SignalMsi) {
return Err(super::Error::CapabilityMissing(Cap::SignalMsi));
}
Ok(())
}