diff options
Diffstat (limited to 'target-arm/cpu64.c')
| -rw-r--r-- | target-arm/cpu64.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/target-arm/cpu64.c b/target-arm/cpu64.c index bb778b3d92..823c739f08 100644 --- a/target-arm/cpu64.c +++ b/target-arm/cpu64.c @@ -32,6 +32,11 @@ static inline void set_feature(CPUARMState *env, int feature) env->features |= 1ULL << feature; } +static inline void unset_feature(CPUARMState *env, int feature) +{ + env->features &= ~(1ULL << feature); +} + #ifndef CONFIG_USER_ONLY static uint64_t a57_l2ctlr_read(CPUARMState *env, const ARMCPRegInfo *ri) { @@ -170,8 +175,42 @@ static const ARMCPUInfo aarch64_cpus[] = { { .name = NULL } }; +static bool aarch64_cpu_get_aarch64(Object *obj, Error **errp) +{ + ARMCPU *cpu = ARM_CPU(obj); + + return arm_feature(&cpu->env, ARM_FEATURE_AARCH64); +} + +static void aarch64_cpu_set_aarch64(Object *obj, bool value, Error **errp) +{ + ARMCPU *cpu = ARM_CPU(obj); + + /* At this time, this property is only allowed if KVM is enabled. This + * restriction allows us to avoid fixing up functionality that assumes a + * uniform execution state like do_interrupt. + */ + if (!kvm_enabled()) { + error_setg(errp, "'aarch64' feature cannot be disabled " + "unless KVM is enabled"); + return; + } + + if (value == false) { + unset_feature(&cpu->env, ARM_FEATURE_AARCH64); + } else { + set_feature(&cpu->env, ARM_FEATURE_AARCH64); + } +} + static void aarch64_cpu_initfn(Object *obj) { + object_property_add_bool(obj, "aarch64", aarch64_cpu_get_aarch64, + aarch64_cpu_set_aarch64, NULL); + object_property_set_description(obj, "aarch64", + "Set on/off to enable/disable aarch64 " + "execution state ", + NULL); } static void aarch64_cpu_finalizefn(Object *obj) |