KVM: arm64: Change the return type of kvm_vcpu_preferred_target()

kvm_vcpu_preferred_target() always return 0 because kvm_target_cpu()
never returns a negative error code.

Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Reviewed-by: Alexandru Elisei <alexandru.elisei@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20211105011500.16280-1-yuehaibing@huawei.com

diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h
index d0221fb..f7e36e3 100644 (file)
--- a/arch/arm64/include/asm/kvm_host.h
+++ b/arch/arm64/include/asm/kvm_host.h
@@ -584,7 +584,7 @@ struct kvm_vcpu_stat {
        u64 exits;
 };
 
-int kvm_vcpu_preferred_target(struct kvm_vcpu_init *init);
+void kvm_vcpu_preferred_target(struct kvm_vcpu_init *init);
 unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu);
 int kvm_arm_copy_reg_indices(struct kvm_vcpu *vcpu, u64 __user *indices);
 int kvm_arm_get_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg);

diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c
index 24a1e86..e2dd575 100644 (file)
--- a/arch/arm64/kvm/arm.c
+++ b/arch/arm64/kvm/arm.c
@@ -1397,12 +1397,9 @@ long kvm_arch_vm_ioctl(struct file *filp,
                return kvm_vm_ioctl_set_device_addr(kvm, &dev_addr);
        }
        case KVM_ARM_PREFERRED_TARGET: {
-               int err;
                struct kvm_vcpu_init init;
 
-               err = kvm_vcpu_preferred_target(&init);
-               if (err)
-                       return err;
+               kvm_vcpu_preferred_target(&init);
 
                if (copy_to_user(argp, &init, sizeof(init)))
                        return -EFAULT;

diff --git a/arch/arm64/kvm/guest.c b/arch/arm64/kvm/guest.c
index 5ce26be..e116c77 100644 (file)
--- a/arch/arm64/kvm/guest.c
+++ b/arch/arm64/kvm/guest.c
@@ -869,13 +869,10 @@ u32 __attribute_const__ kvm_target_cpu(void)
        return KVM_ARM_TARGET_GENERIC_V8;
 }
 
-int kvm_vcpu_preferred_target(struct kvm_vcpu_init *init)
+void kvm_vcpu_preferred_target(struct kvm_vcpu_init *init)
 {
        u32 target = kvm_target_cpu();
 
-       if (target < 0)
-               return -ENODEV;
-
        memset(init, 0, sizeof(*init));
 
        /*
@@ -885,8 +882,6 @@ int kvm_vcpu_preferred_target(struct kvm_vcpu_init *init)
         * target type.
         */
        init->target = (__u32)target;
-
-       return 0;
 }
 
 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)