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AArch64: Preparation for vCPU save/restore

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This commit ports code from firecracker and refactors the existing
AArch64 code as the preparation for implementing save/restore
AArch64 vCPU, including:

1. Modification of `arm64_core_reg` macro to retrive the index of
arm64 core register and implemention of a helper to determine if
a register is a system register.

2. Move some macros and helpers in `arch` crate to the `hypervisor`
crate.

3. Added related unit tests for above functions and macros.

Signed-off-by: Henry Wang <Henry.Wang@arm.com>
This commit is contained in:
Henry Wang
2020-08-28 17:06:54 +08:00
committed by Rob Bradford
parent 5c3f4dbe6f
commit e3d45be6f7
6 changed files with 171 additions and 99 deletions
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13
hypervisor/src/kvm/mod.rs
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@@ -9,7 +9,9 @@
//
#[cfg(target_arch = "aarch64")]
pub use crate::aarch64::{check_required_kvm_extensions, VcpuInit, VcpuKvmState as CpuState};
pub use crate::aarch64::{
check_required_kvm_extensions, VcpuInit, VcpuKvmState as CpuState, MPIDR_EL1,
};
use crate::cpu;
use crate::device;
use crate::hypervisor;
@@ -763,6 +765,15 @@ impl cpu::Vcpu for KvmVcpu {
.get_one_reg(reg_id)
.map_err(|e| cpu::HypervisorCpuError::GetOneReg(e.into()))
}
///
/// Read the MPIDR - Multiprocessor Affinity Register.
///
#[cfg(any(target_arch = "arm", target_arch = "aarch64"))]
fn read_mpidr(&self) -> cpu::Result<u64> {
self.fd
.get_one_reg(MPIDR_EL1)
.map_err(|e| cpu::HypervisorCpuError::GetSysRegister(e.into()))
}
#[cfg(target_arch = "x86_64")]
///
/// Get the current CPU state