KVM: arm64: gic-v5: Create and initialise vgic_v5

Browse source

Update kvm_vgic_create to create a vgic_v5 device. When creating a
vgic, FEAT_GCIE in the ID_AA64PFR2 is only exposed to vgic_v5-based
guests, and is hidden otherwise. GIC in ~ID_AA64PFR0_EL1 is never
exposed for a vgic_v5 guest.

When initialising a vgic_v5, skip kvm_vgic_dist_init as GICv5 doesn't
support one. The current vgic_v5 implementation only supports PPIs, so
no SPIs are initialised either.

The current vgic_v5 support doesn't extend to nested guests. Therefore,
the init of vgic_v5 for a nested guest is failed in vgic_v5_init.

As the current vgic_v5 doesn't require any resources to be mapped,
vgic_v5_map_resources is simply used to check that the vgic has indeed
been initialised. Again, this will change as more GICv5 support is
merged in.

Signed-off-by: Sascha Bischoff <sascha.bischoff@arm.com>
Reviewed-by: Jonathan Cameron <jonathan.cameron@huawei.com>
Link: https://patch.msgid.link/20260319154937.3619520-29-sascha.bischoff@arm.com
Signed-off-by: Marc Zyngier <maz@kernel.org>

...

This commit is contained in:

Sascha Bischoff 2026-03-19 15:56:59 +00:00 • committed by Marc Zyngier

parent b88d05a893

commit f4d37c7c35

4 changed files with 63 additions and 20 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

56

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

View file

26

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

View file

2

arch/arm64/kvm/vgic/vgic.h

View file

1

include/kvm/arm_vgic.h

View file