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| author | Marc Zyngier <maz@kernel.org> | 2022-04-05 19:23:26 +0100 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2022-05-04 14:09:53 +0100 |
| commit | 4645d11f4a5538ec1221f36e397cfb0115718ffe (patch) | |
| tree | 6ad52be9cbdd181135c5a4b2baa5af4bbd7425d6 /include/kvm | |
| parent | 94828468a6085e6ae148986d300b634b87f86516 (diff) | |
| download | linux-4645d11f4a5538ec1221f36e397cfb0115718ffe.tar.gz | |
KVM: arm64: vgic-v3: Implement MMIO-based LPI invalidation
Since GICv4.1, it has become legal for an implementation to advertise
GICR_{INVLPIR,INVALLR,SYNCR} while having an ITS, allowing for a more
efficient invalidation scheme (no guest command queue contention when
multiple CPUs are generating invalidations).
Provide the invalidation registers as a primitive to their ITS
counterpart. Note that we don't advertise them to the guest yet
(the architecture allows an implementation to do this).
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Oliver Upton <oupton@google.com>
Link: https://lore.kernel.org/r/20220405182327.205520-4-maz@kernel.org
Diffstat (limited to 'include/kvm')
| -rw-r--r-- | include/kvm/arm_vgic.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/kvm/arm_vgic.h b/include/kvm/arm_vgic.h index fdf1c2c322e5..401236f97cf2 100644 --- a/include/kvm/arm_vgic.h +++ b/include/kvm/arm_vgic.h @@ -344,6 +344,7 @@ struct vgic_cpu { struct vgic_io_device rd_iodev; struct vgic_redist_region *rdreg; u32 rdreg_index; + atomic_t syncr_busy; /* Contains the attributes and gpa of the LPI pending tables. */ u64 pendbaser; |