KVM: x86: Drop unused return code from VCPU reset callback

Neither vmx nor svm nor the common part may generate an error on
kvm_vcpu_reset. So drop the return code.

Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>

4 files changed, 9 insertions, 19 deletions

diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index 635a74d22409..348d85965ead 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -643,7 +643,7 @@ struct kvm_x86_ops {
         /* Create, but do not attach this VCPU */
         struct kvm_vcpu *(*vcpu_create)(struct kvm *kvm, unsigned id);
         void (*vcpu_free)(struct kvm_vcpu *vcpu);
-        int (*vcpu_reset)(struct kvm_vcpu *vcpu);
+        void (*vcpu_reset)(struct kvm_vcpu *vcpu);
 
         void (*prepare_guest_switch)(struct kvm_vcpu *vcpu);
         void (*vcpu_load)(struct kvm_vcpu *vcpu, int cpu);
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index e1b1ce21bc00..907e4280116d 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -1191,7 +1191,7 @@ static void init_vmcb(struct vcpu_svm *svm)
         enable_gif(svm);
 }
 
-static int svm_vcpu_reset(struct kvm_vcpu *vcpu)
+static void svm_vcpu_reset(struct kvm_vcpu *vcpu)
 {
         struct vcpu_svm *svm = to_svm(vcpu);
         u32 dummy;
@@ -1207,8 +1207,6 @@ static int svm_vcpu_reset(struct kvm_vcpu *vcpu)
 
         kvm_cpuid(vcpu, &eax, &dummy, &dummy, &dummy);
         kvm_register_write(vcpu, VCPU_REGS_RDX, eax);
-
-        return 0;
 }
 
 static struct kvm_vcpu *svm_create_vcpu(struct kvm *kvm, unsigned int id)
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 473a5fe7e006..f588171be177 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -4100,11 +4100,10 @@ static int vmx_vcpu_setup(struct vcpu_vmx *vmx)
         return 0;
 }
 
-static int vmx_vcpu_reset(struct kvm_vcpu *vcpu)
+static void vmx_vcpu_reset(struct kvm_vcpu *vcpu)
 {
         struct vcpu_vmx *vmx = to_vmx(vcpu);
         u64 msr;
-        int ret;
 
         vmx->rmode.vm86_active = 0;
 
@@ -4195,10 +4194,6 @@ static int vmx_vcpu_reset(struct kvm_vcpu *vcpu)
         update_exception_bitmap(&vmx->vcpu);
 
         vpid_sync_context(vmx);
-
-        ret = 0;
-
-        return ret;
 }
 
 /*
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index b67985af1753..fadd5a750476 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -162,7 +162,7 @@ u64 __read_mostly host_xcr0;
 
 static int emulator_fix_hypercall(struct x86_emulate_ctxt *ctxt);
 
-static int kvm_vcpu_reset(struct kvm_vcpu *vcpu);
+static void kvm_vcpu_reset(struct kvm_vcpu *vcpu);
 
 static inline void kvm_async_pf_hash_reset(struct kvm_vcpu *vcpu)
 {
@@ -5858,9 +5858,7 @@ static int __vcpu_run(struct kvm_vcpu *vcpu)
                 pr_debug("vcpu %d received sipi with vector # %x\n",
                          vcpu->vcpu_id, vcpu->arch.sipi_vector);
                 kvm_lapic_reset(vcpu);
-                r = kvm_vcpu_reset(vcpu);
-                if (r)
-                        return r;
+                kvm_vcpu_reset(vcpu);
                 vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE;
         }
 
@@ -6486,9 +6484,8 @@ int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
         r = vcpu_load(vcpu);
         if (r)
                 return r;
-        r = kvm_vcpu_reset(vcpu);
-        if (r == 0)
-                r = kvm_mmu_setup(vcpu);
+        kvm_vcpu_reset(vcpu);
+        r = kvm_mmu_setup(vcpu);
         vcpu_put(vcpu);
 
         return r;
@@ -6525,7 +6522,7 @@ void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
         kvm_x86_ops->vcpu_free(vcpu);
 }
 
-static int kvm_vcpu_reset(struct kvm_vcpu *vcpu)
+static void kvm_vcpu_reset(struct kvm_vcpu *vcpu)
 {
         atomic_set(&vcpu->arch.nmi_queued, 0);
         vcpu->arch.nmi_pending = 0;
@@ -6552,7 +6549,7 @@ static int kvm_vcpu_reset(struct kvm_vcpu *vcpu)
         vcpu->arch.regs_avail = ~0;
         vcpu->arch.regs_dirty = ~0;
 
-        return kvm_x86_ops->vcpu_reset(vcpu);
+        kvm_x86_ops->vcpu_reset(vcpu);
 }
 
 int kvm_arch_hardware_enable(void *garbage)