hw/riscv/virt: Restrict ACLINT to TCG

The Advanced Core Local Interruptor (ACLINT) device can
only be used with TCG. Check for TCG enabled instead of
KVM being not. Only add the property when TCG is used.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20230629121103.87733-3-philmd@linaro.org>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>

docs/system/riscv/virt.rst

@@ -93,6 +93,7 @@ The following machine-specific options are supported:
 
   When this option is "on", ACLINT devices will be emulated instead of
   SiFive CLINT. When not specified, this option is assumed to be "off".
+  This option is restricted to the TCG accelerator.
 
 - aia=[none|aplic|aplic-imsic]
 

hw/riscv/virt.c

@@ -44,6 +44,7 @@
 #include "chardev/char.h"
 #include "sysemu/device_tree.h"
 #include "sysemu/sysemu.h"
+#include "sysemu/tcg.h"
 #include "sysemu/kvm.h"
 #include "sysemu/tpm.h"
 #include "hw/pci/pci.h"
@@ -776,7 +777,7 @@ static void create_fdt_sockets(RISCVVirtState *s, const MemMapEntry *memmap,
 
         g_free(clust_name);
 
-        if (!kvm_enabled()) {
+        if (tcg_enabled()) {
             if (s->have_aclint) {
                 create_fdt_socket_aclint(s, memmap, socket,
                     &intc_phandles[phandle_pos]);
@@ -1370,7 +1371,7 @@ static void virt_machine_init(MachineState *machine)
                                 hart_count, &error_abort);
         sysbus_realize(SYS_BUS_DEVICE(&s->soc[i]), &error_fatal);
 
-        if (!kvm_enabled()) {
+        if (tcg_enabled()) {
             if (s->have_aclint) {
                 if (s->aia_type == VIRT_AIA_TYPE_APLIC_IMSIC) {
                     /* Per-socket ACLINT MTIMER */
@@ -1682,12 +1683,13 @@ static void virt_machine_class_init(ObjectClass *oc, void *data)
     machine_class_allow_dynamic_sysbus_dev(mc, TYPE_TPM_TIS_SYSBUS);
 #endif
 
-    object_class_property_add_bool(oc, "aclint", virt_get_aclint,
-                                   virt_set_aclint);
-    object_class_property_set_description(oc, "aclint",
-                                          "Set on/off to enable/disable "
-                                          "emulating ACLINT devices");
-
+    if (tcg_enabled()) {
+        object_class_property_add_bool(oc, "aclint", virt_get_aclint,
+                                       virt_set_aclint);
+        object_class_property_set_description(oc, "aclint",
+                                              "Set on/off to enable/disable "
+                                              "emulating ACLINT devices");
+    }
     object_class_property_add_str(oc, "aia", virt_get_aia,
                                   virt_set_aia);
     object_class_property_set_description(oc, "aia",