hw/arm/armsse: Add unimplemented-device stub for CPU local control registers

The SSE-200 has a "CPU local security control" register bank; add an
unimplemented-device stub for it. (The register bank has only one
interesting register, which allows the guest to lock down changes
to various CPU registers so they cannot be modified further. We
don't support that in our Cortex-M33 model anyway.)

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20190121185118.18550-19-peter.maydell@linaro.org

diff --git a/hw/arm/armsse.c b/hw/arm/armsse.c
index 41e4a781e1178013fc833cc198c9fdaba5707b34..9c111ac6a40f84fbef0e128ac256ec0be21eedb7 100644 (file)
--- a/hw/arm/armsse.c
+++ b/hw/arm/armsse.c
@@ -33,6 +33,7 @@ struct ARMSSEInfo {
     bool has_mhus;
     bool has_ppus;
     bool has_cachectrl;
+    bool has_cpusecctrl;
 };
 
 static const ARMSSEInfo armsse_variants[] = {
@@ -45,6 +46,7 @@ static const ARMSSEInfo armsse_variants[] = {
         .has_mhus = false,
         .has_ppus = false,
         .has_cachectrl = false,
+        .has_cpusecctrl = false,
     },
 };
 
@@ -302,6 +304,16 @@ static void armsse_init(Object *obj)
             g_free(name);
         }
     }
+    if (info->has_cpusecctrl) {
+        for (i = 0; i < info->num_cpus; i++) {
+            char *name = g_strdup_printf("cpusecctrl%d", i);
+
+            sysbus_init_child_obj(obj, name, &s->cpusecctrl[i],
+                                  sizeof(s->cpusecctrl[i]),
+                                  TYPE_UNIMPLEMENTED_DEVICE);
+            g_free(name);
+        }
+    }
     object_initialize_child(obj, "nmi-orgate", &s->nmi_orgate,
                             sizeof(s->nmi_orgate), TYPE_OR_IRQ,
                             &error_abort, NULL);
@@ -833,6 +845,25 @@ static void armsse_realize(DeviceState *dev, Error **errp)
             memory_region_add_subregion(&s->cpu_container[i], 0x50010000, mr);
         }
     }
+    if (info->has_cpusecctrl) {
+        for (i = 0; i < info->num_cpus; i++) {
+            char *name = g_strdup_printf("CPUSECCTRL%d", i);
+            MemoryRegion *mr;
+
+            qdev_prop_set_string(DEVICE(&s->cpusecctrl[i]), "name", name);
+            g_free(name);
+            qdev_prop_set_uint64(DEVICE(&s->cpusecctrl[i]), "size", 0x1000);
+            object_property_set_bool(OBJECT(&s->cpusecctrl[i]), true,
+                                     "realized", &err);
+            if (err) {
+                error_propagate(errp, err);
+                return;
+            }
+
+            mr = sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->cpusecctrl[i]), 0);
+            memory_region_add_subregion(&s->cpu_container[i], 0x50011000, mr);
+        }
+    }
 
     /* 0x40020000 .. 0x4002ffff : ARMSSE system control peripheral region */
     /* Devices behind APB PPC1:

diff --git a/include/hw/arm/armsse.h b/include/hw/arm/armsse.h
index 9d830057d5cf35cda1dc25c130346c91bba3e353..961dbb3032a66c06f61b649ecf9de547118ff1f9 100644 (file)
--- a/include/hw/arm/armsse.h
+++ b/include/hw/arm/armsse.h
@@ -151,6 +151,7 @@ typedef struct ARMSSE {
     UnimplementedDeviceState mhu[2];
     UnimplementedDeviceState ppu[NUM_PPUS];
     UnimplementedDeviceState cachectrl[SSE_MAX_CPUS];
+    UnimplementedDeviceState cpusecctrl[SSE_MAX_CPUS];
 
     /*
      * 'container' holds all devices seen by all CPUs.