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hypervisor, vmm: introduce trait functions for aarch64 PMU

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The original code uses kvm_device_attr directly outside of the
hyeprvisor crate. That leaks hypervisor details.

No functional change intended.

Signed-off-by: Wei Liu <liuwe@microsoft.com>
This commit is contained in:
Wei Liu
2022-07-20 11:42:24 +00:00
committed by Liu Wei
parent b5d10eb28b
commit f84ddedb1a
3 changed files with 49 additions and 30 deletions
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29
hypervisor/src/kvm/mod.rs
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@@ -2063,6 +2063,35 @@ impl cpu::Vcpu for KvmVcpu {
]
.to_vec()
}
#[cfg(target_arch = "aarch64")]
fn has_pmu_support(&self) -> bool {
let cpu_attr = kvm_bindings::kvm_device_attr {
group: kvm_bindings::KVM_ARM_VCPU_PMU_V3_CTRL,
attr: u64::from(kvm_bindings::KVM_ARM_VCPU_PMU_V3_INIT),
addr: 0x0,
flags: 0,
};
self.has_vcpu_attr(&cpu_attr).is_ok()
}
#[cfg(target_arch = "aarch64")]
fn init_pmu(&self, irq: u32) -> cpu::Result<()> {
let cpu_attr = kvm_bindings::kvm_device_attr {
group: kvm_bindings::KVM_ARM_VCPU_PMU_V3_CTRL,
attr: u64::from(kvm_bindings::KVM_ARM_VCPU_PMU_V3_INIT),
addr: 0x0,
flags: 0,
};
let cpu_attr_irq = kvm_bindings::kvm_device_attr {
group: kvm_bindings::KVM_ARM_VCPU_PMU_V3_CTRL,
attr: u64::from(kvm_bindings::KVM_ARM_VCPU_PMU_V3_IRQ),
addr: &irq as *const u32 as u64,
flags: 0,
};
self.set_vcpu_attr(&cpu_attr_irq)
.map_err(|_| cpu::HypervisorCpuError::InitializePmu)?;
self.set_vcpu_attr(&cpu_attr)
.map_err(|_| cpu::HypervisorCpuError::InitializePmu)
}
}
impl KvmVcpu {