target/loongarch: fix vcpu reset command word issue

When the KVM_REG_LOONGARCH_VCPU_RESET command word
is sent to the kernel through the kvm_set_one_reg interface,
the parameter source needs to be a legal address,
otherwise the kernel will return an error and the command word
will fail to be sent.

Signed-off-by: Xianglai Li <lixianglai@loongson.cn>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Bibo Mao <maobibo@loongson.cn>

diff --git a/target/loongarch/kvm/kvm.c b/target/loongarch/kvm/kvm.c
index a3f55155b0301d91dc69eac9f9485d09733d8212..27df02fa3a4485686353a0c9bb8180577b665175 100644 (file)
--- a/target/loongarch/kvm/kvm.c
+++ b/target/loongarch/kvm/kvm.c
@@ -581,9 +581,16 @@ static int kvm_loongarch_get_lbt(CPUState *cs)
 void kvm_arch_reset_vcpu(CPUState *cs)
 {
     CPULoongArchState *env = cpu_env(cs);
+    int ret = 0;
+    uint64_t unused = 0;
 
     env->mp_state = KVM_MP_STATE_RUNNABLE;
-    kvm_set_one_reg(cs, KVM_REG_LOONGARCH_VCPU_RESET, 0);
+    ret = kvm_set_one_reg(cs, KVM_REG_LOONGARCH_VCPU_RESET, &unused);
+    if (ret) {
+        error_report("Failed to set KVM_REG_LOONGARCH_VCPU_RESET: %s",
+                     strerror(errno));
+        exit(EXIT_FAILURE);
+    }
 }
 
 static int kvm_loongarch_get_mpstate(CPUState *cs)