KVM: arm64: gic-v5: Finalize GICv5 PPIs and generate mask

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We only want to expose a subset of the PPIs to a guest. If a PPI does
not have an owner, it is not being actively driven by a device. The
SW_PPI is a special case, as it is likely for userspace to wish to
inject that.

Therefore, just prior to running the guest for the first time, we need
to finalize the PPIs. A mask is generated which, when combined with
trapping a guest's PPI accesses, allows for the guest's view of the
PPI to be filtered. This mask is global to the VM as all VCPUs PPI
configurations must match.

In addition, the PPI HMR is calculated.

Signed-off-by: Sascha Bischoff <sascha.bischoff@arm.com>
Reviewed-by: Jonathan Cameron <jonathan.cameron@huawei.com>
Link: https://patch.msgid.link/20260319154937.3619520-19-sascha.bischoff@arm.com
Signed-off-by: Marc Zyngier <maz@kernel.org>

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Sascha Bischoff 2026-03-19 15:54:23 +00:00 • committed by Marc Zyngier

parent 9b8e3d4ca0

commit 8f1fbe2fd2

3 changed files with 63 additions and 0 deletions

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4

arch/arm64/kvm/arm.c

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arch/arm64/kvm/vgic/vgic-v5.c

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include/kvm/arm_vgic.h

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