KVM: arm64: Offer early resume for non-blocking WFxT instructions

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For WFxT instructions used with very small delays, it is not
unlikely that the deadline is already expired by the time we
reach the WFx handling code.

Check for this condition as soon as possible, and return to the
guest immediately if we can.

Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20220419182755.601427-7-maz@kernel.org

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Marc Zyngier 2022-04-19 19:27:51 +01:00

parent 89f5074c50

commit a3fb596514

1 changed files with 26 additions and 4 deletions

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arch/arm64/kvm/handle_exit.c

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