KVM: arm64: Only open the interrupt window on exit due to an interrupt
authorMarc Zyngier <maz@kernel.org>
Fri, 4 Mar 2022 12:04:49 +0000 (12:04 +0000)
committerMarc Zyngier <maz@kernel.org>
Fri, 4 Mar 2022 15:07:04 +0000 (15:07 +0000)
commitf7659f8bcdf86b119d945f3335f20eda219a23ff
tree7c8e2e9daab50b50a3561f8c975e1c3a18b666d1
parent4c11113c1a3d10f5b617e5d2b9acd8d1d715450f
KVM: arm64: Only open the interrupt window on exit due to an interrupt

Now that we properly account for interrupts taken whilst the guest
was running, it becomes obvious that there is no need to open
this accounting window if we didn't exit because of an interrupt.

This saves a number of system register accesses and other barriers
if we exited for any other reason (such as a trap, for example).

Signed-off-by: Marc Zyngier <maz@kernel.org>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Link: https://lore.kernel.org/r/20220304135914.1464721-1-maz@kernel.org
arch/arm64/kvm/arm.c