Introduce host_cpu_feature_supported() helper, returning
whether a ARM feature is supported by host hardware.
Signed-off-by: Philippe Mathieu-Daudé <phi...@linaro.org>
---
target/arm/internals.h | 8 ++++++++
target/arm/hvf/hvf.c | 20 ++++++++++++++++++++
target/arm/kvm.c | 22 ++++++++++++++++++++++
3 files changed, 50 insertions(+)
diff --git a/target/arm/internals.h b/target/arm/internals.h
index 1b3d0244fd6..1742dd88443 100644
--- a/target/arm/internals.h
+++ b/target/arm/internals.h
@@ -1612,6 +1612,14 @@ bool pmsav8_mpu_lookup(CPUARMState *env, uint32_t
address,
void arm_log_exception(CPUState *cs);
+/**
+ * host_cpu_feature_supported:
+ * @feature: Feature to test for support
+ *
+ * Returns: whether @feature is supported by hardware accelerator or emulator
+ */
+bool host_cpu_feature_supported(enum arm_features feature);
+
#endif /* !CONFIG_USER_ONLY */
/*
diff --git a/target/arm/hvf/hvf.c b/target/arm/hvf/hvf.c
index 48e86e62945..05fbd8f7fc9 100644
--- a/target/arm/hvf/hvf.c
+++ b/target/arm/hvf/hvf.c
@@ -547,6 +547,26 @@ static struct hvf_sreg_match hvf_sreg_match[] = {
{ HV_SYS_REG_SP_EL1, HVF_SYSREG(4, 1, 3, 4, 0) },
};
+bool host_cpu_feature_supported(enum arm_features feature)
+{
+ if (!hvf_enabled()) {
+ return false;
+ }
+ switch (feature) {
+ case ARM_FEATURE_V8:
+ case ARM_FEATURE_NEON:
+ case ARM_FEATURE_AARCH64:
+ case ARM_FEATURE_PMU:
+ case ARM_FEATURE_GENERIC_TIMER:
+ return true;
+ case ARM_FEATURE_EL2:
+ case ARM_FEATURE_EL3:
+ return false;
+ default:
+ g_assert_not_reached();
+ }
+}
+
int hvf_get_registers(CPUState *cpu)
{
ARMCPU *arm_cpu = ARM_CPU(cpu);
diff --git a/target/arm/kvm.c b/target/arm/kvm.c
index 66723448554..93da9d67806 100644
--- a/target/arm/kvm.c
+++ b/target/arm/kvm.c
@@ -1771,6 +1771,28 @@ void kvm_arm_steal_time_finalize(ARMCPU *cpu, Error
**errp)
}
}
+bool host_cpu_feature_supported(enum arm_features feature)
+{
+ if (!kvm_enabled()) {
+ return false;
+ }
+ switch (feat) {
+ case ARM_FEATURE_V8:
+ case ARM_FEATURE_NEON:
+ case ARM_FEATURE_AARCH64:
+ case ARM_FEATURE_GENERIC_TIMER:
+ return true;
+ case ARM_FEATURE_PMU:
+ return kvm_arm_pmu_supported();
+ case ARM_FEATURE_EL2:
+ return kvm_arm_el2_supported();
+ case ARM_FEATURE_EL3:
+ return false;
+ default:
+ g_assert_not_reached();
+ }
+}
+
bool kvm_arm_aarch32_supported(void)
{
return kvm_check_extension(kvm_state, KVM_CAP_ARM_EL1_32BIT);
--
2.49.0
