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AArch64: Implement AArch64 vCPU states save/restore

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This commit adds methods to save/restore AArch64 vCPU registers,
including:

1. The AArch64 `VcpuKvmState` structure.

2. Some `Vcpu` trait methods of the `KvmVcpu` structure to
enable the save/restore of the AArch64 vCPU states.

Signed-off-by: Henry Wang <Henry.Wang@arm.com>
This commit is contained in:
Henry Wang
2020-08-30 16:44:39 +08:00
committed by Rob Bradford
parent e3d45be6f7
commit ffafeda4b6
4 changed files with 335 additions and 13 deletions
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48
hypervisor/src/cpu.rs
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@@ -10,6 +10,8 @@
#[cfg(target_arch = "aarch64")]
use crate::aarch64::VcpuInit;
#[cfg(target_arch = "aarch64")]
use crate::aarch64::{OneRegister, RegList, StandardRegisters};
use crate::{CpuState, MpState};
#[cfg(target_arch = "x86_64")]
@@ -154,10 +156,30 @@ pub enum HypervisorCpuError {
#[error("Failed to enable HyperV SynIC")]
EnableHyperVSynIC(#[source] anyhow::Error),
///
/// Getting AArch64 core register error
///
#[error("Failed to get core register: {0}")]
GetCoreRegister(#[source] anyhow::Error),
///
/// Setting AArch64 core register error
///
#[error("Failed to set core register: {0}")]
SetCoreRegister(#[source] anyhow::Error),
///
/// Getting AArch64 registers list error
///
#[error("Failed to retrieve list of registers: {0}")]
GetRegList(#[source] anyhow::Error),
///
/// Getting AArch64 system register error
///
#[error("Failed to get system register: {0}")]
GetSysRegister(#[source] anyhow::Error),
///
/// Setting AArch64 system register error
///
#[error("Failed to set system register: {0}")]
SetSysRegister(#[source] anyhow::Error),
}
#[derive(Debug)]
@@ -311,6 +333,32 @@ pub trait Vcpu: Send + Sync {
#[cfg(any(target_arch = "arm", target_arch = "aarch64"))]
fn get_one_reg(&self, reg_id: u64) -> Result<u64>;
///
/// Gets a list of the guest registers that are supported for the
/// KVM_GET_ONE_REG/KVM_SET_ONE_REG calls.
///
#[cfg(any(target_arch = "arm", target_arch = "aarch64"))]
fn get_reg_list(&self, reg_list: &mut RegList) -> Result<()>;
///
/// Save the state of the core registers.
///
#[cfg(any(target_arch = "arm", target_arch = "aarch64"))]
fn core_registers(&self, state: &mut StandardRegisters) -> Result<()>;
///
/// Restore the state of the core registers.
///
#[cfg(any(target_arch = "arm", target_arch = "aarch64"))]
fn set_core_registers(&self, state: &StandardRegisters) -> Result<()>;
///
/// Save the state of the system registers.
///
#[cfg(any(target_arch = "arm", target_arch = "aarch64"))]
fn system_registers(&self, state: &mut Vec<OneRegister>) -> Result<()>;
///
/// Restore the state of the system registers.
///
#[cfg(any(target_arch = "arm", target_arch = "aarch64"))]
fn set_system_registers(&self, state: &[OneRegister]) -> Result<()>;
///
/// Read the MPIDR - Multiprocessor Affinity Register.
///
#[cfg(any(target_arch = "arm", target_arch = "aarch64"))]