KVM: arm/arm64: vgic-v2: Make GICD_SGIR quicker to hit

The GICD_SGIR register lives a long way from the beginning of
the handler array, which is searched linearly. As this is hit
pretty often, let's move it up. This saves us some precious
cycles when the guest is generating IPIs.

Acked-by: Christoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>

diff --git a/virt/kvm/arm/vgic-v2-emul.c b/virt/kvm/arm/vgic-v2-emul.c
index 13907970d11c3a94b8dc0a5b1848973035cc41cf..1b0bee095427ecb4a563dcdc51a152073c4f157d 100644 (file)
--- a/virt/kvm/arm/vgic-v2-emul.c
+++ b/virt/kvm/arm/vgic-v2-emul.c
@@ -320,6 +320,11 @@ static bool handle_mmio_sgi_clear(struct kvm_vcpu *vcpu,
 }
 
 static const struct vgic_io_range vgic_dist_ranges[] = {
+       {
+               .base           = GIC_DIST_SOFTINT,
+               .len            = 4,
+               .handle_mmio    = handle_mmio_sgi_reg,
+       },
        {
                .base           = GIC_DIST_CTRL,
                .len            = 12,
@@ -386,11 +391,6 @@ static const struct vgic_io_range vgic_dist_ranges[] = {
                .bits_per_irq   = 2,
                .handle_mmio    = handle_mmio_cfg_reg,
        },
-       {
-               .base           = GIC_DIST_SOFTINT,
-               .len            = 4,
-               .handle_mmio    = handle_mmio_sgi_reg,
-       },
        {
                .base           = GIC_DIST_SGI_PENDING_CLEAR,
                .len            = VGIC_NR_SGIS,