KVM: arm64: Kill arch_timer_context::direct field

The newly introduced arch_timer_context::direct field is a bit pointless,
as it is always set on timers that are... err... direct, while
we already have a way to get to that by doing a get_map() operation.

Additionally, this field is:

- only set when get_map() is called

- never cleared

and the single point where it is actually checked doesn't call get_map()
at all.

At this stage, it is probably better to just kill it, and rely on
get_map() to give us the correct information.

Reviewed-by: Sascha Bischoff <sascha.bischoff@arm.com>
Fixes: 9491c63b6c ("KVM: arm64: gic-v5: Enlighten arch timer for GICv5")
Link: https://sashiko.dev/#/patchset/20260319154937.3619520-1-sascha.bischoff%40arm.com
Link: https://patch.msgid.link/20260401103611.357092-12-maz@kernel.org
Signed-off-by: Marc Zyngier <maz@kernel.org>

arch/arm64/kvm/arch_timer.c

@@ -183,10 +183,6 @@ void get_timer_map(struct kvm_vcpu *vcpu, struct timer_map *map)
 		map->emul_ptimer = vcpu_ptimer(vcpu);
 	}
 
-	map->direct_vtimer->direct = true;
-	if (map->direct_ptimer)
-		map->direct_ptimer->direct = true;
-
 	trace_kvm_get_timer_map(vcpu->vcpu_id, map);
 }
 
@@ -462,8 +458,15 @@ static void kvm_timer_update_irq(struct kvm_vcpu *vcpu, bool new_level,
 		return;
 
 	/* Skip injecting on GICv5 for directly injected (DVI'd) timers */
-	if (vgic_is_v5(vcpu->kvm) && timer_ctx->direct)
-		return;
+	if (vgic_is_v5(vcpu->kvm)) {
+		struct timer_map map;
+
+		get_timer_map(vcpu, &map);
+
+		if (map.direct_ptimer == timer_ctx ||
+		    map.direct_vtimer == timer_ctx)
+			return;
+	}
 
 	kvm_vgic_inject_irq(vcpu->kvm, vcpu,
 			    timer_irq(timer_ctx),