KVM: arm/arm64: vgic: Use a single IO device per redistributor

At the moment we use 2 IO devices per GICv3 redistributor: one
one for the RD_base frame and one for the SGI_base frame.

Instead we can use a single IO device per redistributor (the 2
frames are contiguous). This saves slots on the KVM_MMIO_BUS
which is currently limited to NR_IOBUS_DEVS (1000).

This change allows to instantiate up to 512 redistributors and may
speed the guest boot with a large number of VCPUs.

Signed-off-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>

1 files changed, 0 insertions, 1 deletions

diff --git a/include/kvm/arm_vgic.h b/include/kvm/arm_vgic.h
index ded50a30e2d5..af4f09c02bf1 100644
--- a/include/kvm/arm_vgic.h
+++ b/include/kvm/arm_vgic.h
@@ -314,7 +314,6 @@ struct vgic_cpu {
          * parts of the redistributor.
          */
         struct vgic_io_device   rd_iodev;
-        struct vgic_io_device   sgi_iodev;
         struct vgic_redist_region *rdreg;
 
         /* Contains the attributes and gpa of the LPI pending tables. */