| // Copyright 2020 The Chromium OS Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| use base::Result; |
| use downcast_rs::impl_downcast; |
| |
| use crate::{Hypervisor, IrqRoute, IrqSource, IrqSourceChip, Vcpu, Vm}; |
| |
| /// A wrapper for using a VM on aarch64 and getting/setting its state. |
| pub trait VmAArch64: Vm { |
| /// Gets the `Hypervisor` that created this VM. |
| fn get_hypervisor(&self) -> &dyn Hypervisor; |
| |
| /// Create a Vcpu with the specified Vcpu ID. |
| fn create_vcpu(&self, id: usize) -> Result<Box<dyn VcpuAArch64>>; |
| } |
| |
| /// A wrapper around creating and using a VCPU on aarch64. |
| pub trait VcpuAArch64: Vcpu { |
| /// Does ARM-specific initialization of this VCPU. Inits the VCPU with the preferred target |
| /// VCPU type and the specified `features`, and resets the value of all registers to defaults. |
| /// All VCPUs should be created before calling this function. |
| fn init(&self, features: &[VcpuFeature]) -> Result<()>; |
| |
| /// Initializes the ARM Performance Monitor Unit v3 on this VCPU, with overflow interrupt number |
| /// `irq`. |
| fn init_pmu(&self, irq: u64) -> Result<()>; |
| |
| /// Sets the value of a register on this VCPU. `reg_id` is the register ID, as specified in the |
| /// KVM API documentation for KVM_SET_ONE_REG. |
| fn set_one_reg(&self, reg_id: u64, data: u64) -> Result<()>; |
| } |
| |
| impl_downcast!(VcpuAArch64); |
| |
| // Convenience constructors for IrqRoutes |
| impl IrqRoute { |
| pub fn gic_irq_route(irq_num: u32) -> IrqRoute { |
| IrqRoute { |
| gsi: irq_num, |
| source: IrqSource::Irqchip { |
| chip: IrqSourceChip::Gic, |
| pin: irq_num, |
| }, |
| } |
| } |
| } |
| |
| /// A feature that can be enabled on a VCPU with `VcpuAArch64::init`. |
| #[derive(Clone, Copy, Debug, PartialEq, Eq)] |
| pub enum VcpuFeature { |
| /// Emulate PSCI v0.2 (or a future revision backward compatible with v0.2) for the VCPU. |
| PsciV0_2, |
| /// Emulate Performance Monitor Unit v3 for the VCPU. |
| PmuV3, |
| /// Starts the VCPU in a power-off state. |
| PowerOff, |
| } |