KVM: arm64: GICv3: Handle in-LR deactivation when possible

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Even when we have either an LR overflow or SPIs in flight, it is
extremely likely that the interrupt being deactivated is still in
the LRs, and that going all the way back to the the generic trap
handling code is a waste of time.

Instead, try and deactivate in place when possible, and only if
this fails, perform a full exit.

Tested-by: Fuad Tabba <tabba@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Tested-by: Mark Brown <broonie@kernel.org>
Link: https://msgid.link/20251120172540.2267180-33-maz@kernel.org
Signed-off-by: Oliver Upton <oupton@kernel.org>

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Marc Zyngier 2025-11-20 17:25:22 +00:00 • committed by Oliver Upton

parent 1c3b3cadcd

commit ca3c34da36

1 changed files with 28 additions and 10 deletions

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arch/arm64/kvm/hyp/vgic-v3-sr.c

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