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hypervisor: Add guest pause notification

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Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This commit is contained in:
Sebastien Boeuf 2020-06-23 16:42:00 +02:00
parent 9fa8438063
commit 309924eca8
2 changed files with 21 additions and 0 deletions
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11
hypervisor/src/cpu.rs
View File

@ -139,6 +139,11 @@ pub enum HypervisorCpuError {
///
#[error("Failed to init vcpu: {0}")]
GetOneReg(#[source] anyhow::Error),
///
/// Getting guest clock paused error
///
#[error("Failed to notify guest its clock was paused: {0}")]
NotifyGuestClockPaused(#[source] anyhow::Error),
}
///
@ -248,6 +253,12 @@ pub trait Vcpu: Send + Sync {
/// states of the vcpu.
///
fn get_vcpu_events(&self) -> Result<VcpuEvents>;
#[cfg(target_arch = "x86_64")]
///
/// Let the guest know that it has been paused, which prevents from
/// potential soft lockups when being resumed.
///
fn notify_guest_clock_paused(&self) -> Result<()>;
///
/// Sets the type of CPU to be exposed to the guest and optional features.
///

10
hypervisor/src/kvm/mod.rs
View File

@ -525,6 +525,16 @@ impl cpu::Vcpu for KvmVcpu {
.get_vcpu_events()
.map_err(|e| cpu::HypervisorCpuError::GetVcpuEvents(e.into()))
}
#[cfg(target_arch = "x86_64")]
///
/// Let the guest know that it has been paused, which prevents from
/// potential soft lockups when being resumed.
///
fn notify_guest_clock_paused(&self) -> cpu::Result<()> {
self.fd
.kvmclock_ctrl()
.map_err(|e| cpu::HypervisorCpuError::NotifyGuestClockPaused(e.into()))
}
#[cfg(any(target_arch = "arm", target_arch = "aarch64"))]
fn vcpu_init(&self, kvi: &VcpuInit) -> cpu::Result<()> {
self.fd