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hypervisor: add has/set trait for vcpu

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Like devicefd, vcpufd also has ability to set/has attribute through kvm
ioctl. These traits are used when enable PMU on arm64, so add it here.

Signed-off-by: Jianyong Wu <jianyong.wu@arm.com>
This commit is contained in:
Jianyong Wu
2022-01-11 14:39:42 +08:00
committed by Xin Wang
parent ae68c2f31a
commit 9bcb984962
3 changed files with 44 additions and 2 deletions
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21
hypervisor/src/kvm/mod.rs
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@@ -777,6 +777,27 @@ impl cpu::Vcpu for KvmVcpu {
.set_regs(regs)
.map_err(|e| cpu::HypervisorCpuError::SetStandardRegs(e.into()))
}
#[cfg(target_arch = "aarch64")]
///
/// Set attribute for vcpu.
///
fn set_vcpu_attr(&self, attr: &DeviceAttr) -> cpu::Result<()> {
self.fd
.set_device_attr(attr)
.map_err(|e| cpu::HypervisorCpuError::SetVcpuAttribute(e.into()))
}
#[cfg(target_arch = "aarch64")]
///
/// Check if vcpu has a certain attribute.
///
fn has_vcpu_attr(&self, attr: &DeviceAttr) -> cpu::Result<()> {
self.fd
.has_device_attr(attr)
.map_err(|e| cpu::HypervisorCpuError::HasVcpuAttribute(e.into()))
}
#[cfg(target_arch = "x86_64")]
///
/// Returns the vCPU special registers.