[PATCH v2 2/4] target/loongarch/kvm: pass device attr by reference to kvm_vcpu_ioctl

[Tao Cui <cui.tao@linux.dev>]

From: Tao Cui <cuitao@kylinos.cn>

kvm_vcpu_ioctl() is variadic and reads its argument as a pointer, but
kvm_get_stealtime(), kvm_set_stealtime() and kvm_set_pv_features() pass
the local struct kvm_device_attr by value. It currently works because of
how the calling convention passes large structs; pass &attr so the
argument is passed as intended.

Reviewed-by: Bibo Mao <maobibo@loongson.cn>
Signed-off-by: Tao Cui <cuitao@kylinos.cn>
---
 target/loongarch/kvm/kvm.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/target/loongarch/kvm/kvm.c b/target/loongarch/kvm/kvm.c
index 5bd5e268b9..4bb5be6864 100644
--- a/target/loongarch/kvm/kvm.c
+++ b/target/loongarch/kvm/kvm.c
@@ -46,12 +46,12 @@ static int kvm_get_stealtime(CPUState *cs)
         .addr = (uint64_t)&env->stealtime.guest_addr,
     };
 
-    err = kvm_vcpu_ioctl(cs, KVM_HAS_DEVICE_ATTR, attr);
+    err = kvm_vcpu_ioctl(cs, KVM_HAS_DEVICE_ATTR, &attr);
     if (err) {
         return 0;
     }
 
-    err = kvm_vcpu_ioctl(cs, KVM_GET_DEVICE_ATTR, attr);
+    err = kvm_vcpu_ioctl(cs, KVM_GET_DEVICE_ATTR, &attr);
     if (err) {
         error_report("PVTIME: KVM_GET_DEVICE_ATTR: %s", strerror(errno));
         return err;
@@ -70,12 +70,12 @@ static int kvm_set_stealtime(CPUState *cs)
         .addr = (uint64_t)&env->stealtime.guest_addr,
     };
 
-    err = kvm_vcpu_ioctl(cs, KVM_HAS_DEVICE_ATTR, attr);
+    err = kvm_vcpu_ioctl(cs, KVM_HAS_DEVICE_ATTR, &attr);
     if (err) {
         return 0;
     }
 
-    err = kvm_vcpu_ioctl(cs, KVM_SET_DEVICE_ATTR, attr);
+    err = kvm_vcpu_ioctl(cs, KVM_SET_DEVICE_ATTR, &attr);
     if (err) {
         error_report("PVTIME: KVM_SET_DEVICE_ATTR %s with gpa "TARGET_FMT_lx,
                       strerror(errno), env->stealtime.guest_addr);
@@ -96,13 +96,13 @@ static int kvm_set_pv_features(CPUState *cs)
         .addr = (uint64_t)&val,
     };
 
-    err = kvm_vcpu_ioctl(cs, KVM_HAS_DEVICE_ATTR, attr);
+    err = kvm_vcpu_ioctl(cs, KVM_HAS_DEVICE_ATTR, &attr);
     if (err) {
         return 0;
     }
 
     val = env->pv_features;
-    err = kvm_vcpu_ioctl(cs, KVM_SET_DEVICE_ATTR, attr);
+    err = kvm_vcpu_ioctl(cs, KVM_SET_DEVICE_ATTR, &attr);
     if (err) {
         error_report("Fail to set pv feature "TARGET_FMT_lx " with error %s",
                       val, strerror(errno));
-- 
2.43.0