[PATCH v2 3/3] arm/kvm: convert to read_sys_reg64

[Cornelia Huck <cohuck@redhat.com>]

We can use read_sys_reg64 to get the SVE_VLS register instead of
calling GET_ONE_REG directly.

Suggested-by: Gavin Shan <gshan@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
---
 target/arm/kvm64.c | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/target/arm/kvm64.c b/target/arm/kvm64.c
index 558c0b88dd69..d40c89a84752 100644
--- a/target/arm/kvm64.c
+++ b/target/arm/kvm64.c
@@ -500,10 +500,6 @@ uint32_t kvm_arm_sve_get_vls(CPUState *cs)
             .target = -1,
             .features[0] = (1 << KVM_ARM_VCPU_SVE),
         };
-        struct kvm_one_reg reg = {
-            .id = KVM_REG_ARM64_SVE_VLS,
-            .addr = (uint64_t)&vls[0],
-        };
         int fdarray[3], ret;
 
         probed = true;
@@ -512,7 +508,7 @@ uint32_t kvm_arm_sve_get_vls(CPUState *cs)
             error_report("failed to create scratch VCPU with SVE enabled");
             abort();
         }
-        ret = ioctl(fdarray[2], KVM_GET_ONE_REG, &reg);
+        ret = read_sys_reg64(fdarray[2], &vls[0], KVM_REG_ARM64_SVE_VLS);
         kvm_arm_destroy_scratch_host_vcpu(fdarray);
         if (ret) {
             error_report("failed to get KVM_REG_ARM64_SVE_VLS: %s",
-- 
2.41.0