KVM: arm/arm64: vgic-v3: Make the LR indexing macro public

We store GICv3 LRs in reverse order so that the CPU can save/restore
them in rever order as well (don't ask why, the design is crazy),
and yet generate memory traffic that doesn't completely suck.

We need this macro to be available to the C version of save/restore.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>

1 files changed, 2 insertions, 8 deletions

diff --git a/virt/kvm/arm/vgic-v3.c b/virt/kvm/arm/vgic-v3.c
index 487d6357b7e7..3813d23ebb80 100644
--- a/virt/kvm/arm/vgic-v3.c
+++ b/virt/kvm/arm/vgic-v3.c
@@ -36,18 +36,12 @@
 #define GICH_LR_PHYSID_CPUID            (7UL << GICH_LR_PHYSID_CPUID_SHIFT)
 #define ICH_LR_VIRTUALID_MASK           (BIT_ULL(32) - 1)
 
-/*
- * LRs are stored in reverse order in memory. make sure we index them
- * correctly.
- */
-#define LR_INDEX(lr)                    (VGIC_V3_MAX_LRS - 1 - lr)
-
 static u32 ich_vtr_el2;
 
 static struct vgic_lr vgic_v3_get_lr(const struct kvm_vcpu *vcpu, int lr)
 {
         struct vgic_lr lr_desc;
-        u64 val = vcpu->arch.vgic_cpu.vgic_v3.vgic_lr[LR_INDEX(lr)];
+        u64 val = vcpu->arch.vgic_cpu.vgic_v3.vgic_lr[VGIC_V3_LR_INDEX(lr)];
 
         if (vcpu->kvm->arch.vgic.vgic_model == KVM_DEV_TYPE_ARM_VGIC_V3)
                 lr_desc.irq = val & ICH_LR_VIRTUALID_MASK;
@@ -111,7 +105,7 @@ static void vgic_v3_set_lr(struct kvm_vcpu *vcpu, int lr,
                 lr_val |= ((u64)lr_desc.hwirq) << ICH_LR_PHYS_ID_SHIFT;
         }
 
-        vcpu->arch.vgic_cpu.vgic_v3.vgic_lr[LR_INDEX(lr)] = lr_val;
+        vcpu->arch.vgic_cpu.vgic_v3.vgic_lr[VGIC_V3_LR_INDEX(lr)] = lr_val;
 
         if (!(lr_desc.state & LR_STATE_MASK))
                 vcpu->arch.vgic_cpu.vgic_v3.vgic_elrsr |= (1U << lr);