hw/arm/virt: Simplify create_its()

No need to strstr() check the class name when we can use
kvm_irqchip_in_kernel() to check if the ITS from the host can be used.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Gustavo Romero <gustavo.romero@linaro.org>
Message-id: 20250628195722.977078-4-gustavo.romero@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

1 files changed, 7 insertions, 10 deletions

diff --git a/hw/arm/virt.c b/hw/arm/virt.c
index 6d9256a525..ae419e8671 100644
--- a/hw/arm/virt.c
+++ b/hw/arm/virt.c
@@ -705,21 +705,18 @@ static inline DeviceState *create_acpi_ged(VirtMachineState *vms)
 
 static void create_its(VirtMachineState *vms)
 {
-    const char *itsclass = its_class_name();
     DeviceState *dev;
 
-    if (!strcmp(itsclass, "arm-gicv3-its")) {
-        if (!vms->tcg_its) {
-            itsclass = NULL;
-        }
-    }
-
-    if (!itsclass) {
-        /* Do nothing if not supported */
+    assert(vms->its);
+    if (!kvm_irqchip_in_kernel() && !vms->tcg_its) {
+        /*
+         * Do nothing if ITS is neither supported by the host nor emulated by
+         * the machine.
+         */
         return;
     }
 
-    dev = qdev_new(itsclass);
+    dev = qdev_new(its_class_name());
 
     object_property_set_link(OBJECT(dev), "parent-gicv3", OBJECT(vms->gic),
                              &error_abort);