[Qemu-devel] [RFC v2 1/2] ARM: cpu: add "reset_hivecs" property (high vectors on reset)

[Antony Pavlov <antonynpavlov@gmail.com>]

Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
---
 target-arm/cpu-qom.h |  1 +
 target-arm/cpu.c     | 24 ++++++++++++++++++++++++
 2 files changed, 25 insertions(+)

diff --git a/target-arm/cpu-qom.h b/target-arm/cpu-qom.h
index b55306a..116320c 100644
--- a/target-arm/cpu-qom.h
+++ b/target-arm/cpu-qom.h
@@ -128,6 +128,7 @@ typedef struct ARMCPU {
     uint32_t ccsidr[16];
     uint32_t reset_cbar;
     uint32_t reset_auxcr;
+    bool reset_hivecs;
 } ARMCPU;
 
 #define TYPE_AARCH64_CPU "aarch64-cpu"
diff --git a/target-arm/cpu.c b/target-arm/cpu.c
index cbe108b..b60e3fc 100644
--- a/target-arm/cpu.c
+++ b/target-arm/cpu.c
@@ -224,6 +224,20 @@ static void arm_cpu_initfn(Object *obj)
     }
 }
 
+static bool reset_hivecs_get(Object *obj, Error **err)
+{
+    ARMCPU *cpu = ARM_CPU(obj);
+
+    return cpu->reset_hivecs;
+}
+
+static void reset_hivecs_set(Object *obj, bool value, Error **err)
+{
+    ARMCPU *cpu = ARM_CPU(obj);
+
+    cpu->reset_hivecs = value;
+}
+
 static void arm_cpu_post_init(Object *obj)
 {
     ARMCPU *cpu = ARM_CPU(obj);
@@ -234,6 +248,12 @@ static void arm_cpu_post_init(Object *obj)
                                        &err);
         assert_no_error(err);
     }
+
+    if (!arm_feature(&cpu->env, ARM_FEATURE_M)) {
+        object_property_add_bool(obj, "reset-hivecs",
+            reset_hivecs_get, reset_hivecs_set, &err);
+        assert_no_error(err);
+    }
 }
 
 static void arm_cpu_finalizefn(Object *obj)
@@ -295,6 +315,10 @@ static void arm_cpu_realizefn(DeviceState *dev, Error **errp)
         set_feature(env, ARM_FEATURE_PXN);
     }
 
+    if (cpu->reset_hivecs) {
+            cpu->reset_sctlr |= (1 << 13);
+    }
+
     register_cp_regs_for_features(cpu);
     arm_cpu_register_gdb_regs_for_features(cpu);
 
-- 
1.8.5