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

[Antony Pavlov]

Signed-off-by: Antony Pavlov <antonynpav...@gmail.com>
---
 target-arm/cpu-qom.h |  1 +
 target-arm/cpu.c     | 13 +++++++++++++
 2 files changed, 14 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 d40f2a7..f838499 100644
--- a/target-arm/cpu.c
+++ b/target-arm/cpu.c
@@ -20,6 +20,7 @@
 
 #include "cpu.h"
 #include "qemu-common.h"
+#include "hw/qdev-properties.h"
 #if !defined(CONFIG_USER_ONLY)
 #include "hw/loader.h"
 #endif
@@ -119,6 +120,12 @@ static void arm_cpu_reset(CPUState *s)
             env->regs[15] = pc & ~1;
         }
     }
+
+    if (cpu->reset_hivecs) {
+            uint32_t c1_sys = env->cp15.c1_sys;
+            env->cp15.c1_sys = c1_sys | (1 << 13);
+    }
+
     env->vfp.xregs[ARM_VFP_FPEXC] = 0;
 #endif
     set_flush_to_zero(1, &env->vfp.standard_fp_status);
@@ -854,6 +861,11 @@ typedef struct ARMCPUInfo {
     void (*class_init)(ObjectClass *oc, void *data);
 } ARMCPUInfo;
 
+static Property arm_cpu_properties[] = {
+    DEFINE_PROP_BOOL("hivecs", ARMCPU, reset_hivecs, false),
+    DEFINE_PROP_END_OF_LIST(),
+};
+
 static const ARMCPUInfo arm_cpus[] = {
 #if !defined(CONFIG_USER_ONLY) || !defined(TARGET_AARCH64)
     { .name = "arm926",      .initfn = arm926_initfn },
@@ -902,6 +914,7 @@ static void arm_cpu_class_init(ObjectClass *oc, void *data)
 
     acc->parent_realize = dc->realize;
     dc->realize = arm_cpu_realizefn;
+    dc->props = arm_cpu_properties;
 
     acc->parent_reset = cc->reset;
     cc->reset = arm_cpu_reset;
-- 
1.8.5