tree 3ee3d0cf1d939f6c7ecfb1f02357bf7ec0ba54ae
parent 3fdd04592d38bb31a0bea567d9a66672b484bed3
author Oliver Upton <oupton@google.com> 1651634680 +0000
committer Marc Zyngier <maz@kernel.org> 1651652925 +0100

KVM: arm64: Add support for userspace to suspend a vCPU

Introduce a new MP state, KVM_MP_STATE_SUSPENDED, which indicates a vCPU
is in a suspended state. In the suspended state the vCPU will block
until a wakeup event (pending interrupt) is recognized.

Add a new system event type, KVM_SYSTEM_EVENT_WAKEUP, to indicate to
userspace that KVM has recognized one such wakeup event. It is the
responsibility of userspace to then make the vCPU runnable, or leave it
suspended until the next wakeup event.

Signed-off-by: Oliver Upton <oupton@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20220504032446.4133305-7-oupton@google.com