[PATCH -next 021/491] KERNEL VIRTUAL MACHINE FOR X86 (KVM/x86): Use fallthrough;

From: Joe Perches
Date: Wed Mar 11 2020 - 01:07:38 EST

Convert the various uses of fallthrough comments to fallthrough;

Done via script
Link: https://lore.kernel.org/lkml/b56602fcf79f849e733e7b521bb0e17895d390fa.1582230379.git.joe.com/

Signed-off-by: Joe Perches <joe@xxxxxxxxxxx>
---
arch/x86/kvm/emulate.c | 2 +-
arch/x86/kvm/hyperv.c | 2 +-
arch/x86/kvm/irq_comm.c | 2 +-
arch/x86/kvm/lapic.c | 6 +++---
arch/x86/kvm/mmu/mmu.c | 2 +-
arch/x86/kvm/svm.c | 2 +-
arch/x86/kvm/vmx/vmx.c | 15 +++++++--------
arch/x86/kvm/x86.c | 12 ++++--------
8 files changed, 19 insertions(+), 24 deletions(-)

diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
index bc00642..bae4d8 100644
--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -3025,7 +3025,7 @@ static void string_registers_quirk(struct x86_emulate_ctxt *ctxt)
case 0xa4: /* movsb */
case 0xa5: /* movsd/w */
*reg_rmw(ctxt, VCPU_REGS_RSI) &= (u32)-1;
- /* fall through */
+ fallthrough;
case 0xaa: /* stosb */
case 0xab: /* stosd/w */
*reg_rmw(ctxt, VCPU_REGS_RDI) &= (u32)-1;
diff --git a/arch/x86/kvm/hyperv.c b/arch/x86/kvm/hyperv.c
index a86fda7..934bfb4 100644
--- a/arch/x86/kvm/hyperv.c
+++ b/arch/x86/kvm/hyperv.c
@@ -1652,7 +1652,7 @@ int kvm_hv_hypercall(struct kvm_vcpu *vcpu)
ret = kvm_hvcall_signal_event(vcpu, fast, ingpa);
if (ret != HV_STATUS_INVALID_PORT_ID)
break;
- /* fall through - maybe userspace knows this conn_id. */
+ fallthrough; /* maybe userspace knows this conn_id */
case HVCALL_POST_MESSAGE:
/* don't bother userspace if it has no way to handle it */
if (unlikely(rep || !vcpu_to_synic(vcpu)->active)) {
diff --git a/arch/x86/kvm/irq_comm.c b/arch/x86/kvm/irq_comm.c
index c47d2a..4aa1c2e 100644
--- a/arch/x86/kvm/irq_comm.c
+++ b/arch/x86/kvm/irq_comm.c
@@ -285,7 +285,7 @@ int kvm_set_routing_entry(struct kvm *kvm,
switch (ue->u.irqchip.irqchip) {
case KVM_IRQCHIP_PIC_SLAVE:
e->irqchip.pin += PIC_NUM_PINS / 2;
- /* fall through */
+ fallthrough;
case KVM_IRQCHIP_PIC_MASTER:
if (ue->u.irqchip.pin >= PIC_NUM_PINS / 2)
return -EINVAL;
diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c
index e3099c..64b7a9c 100644
--- a/arch/x86/kvm/lapic.c
+++ b/arch/x86/kvm/lapic.c
@@ -1023,7 +1023,7 @@ static int __apic_accept_irq(struct kvm_lapic *apic, int delivery_mode,
switch (delivery_mode) {
case APIC_DM_LOWEST:
vcpu->arch.apic_arb_prio++;
- /* fall through */
+ fallthrough;
case APIC_DM_FIXED:
if (unlikely(trig_mode && !level))
break;
@@ -1311,7 +1311,7 @@ static u32 __apic_read(struct kvm_lapic *apic, unsigned int offset)
break;
case APIC_TASKPRI:
report_tpr_access(apic, false);
- /* fall thru */
+ fallthrough;
default:
val = kvm_lapic_get_reg(apic, offset);
break;
@@ -1952,7 +1952,7 @@ int kvm_lapic_reg_write(struct kvm_lapic *apic, u32 reg, u32 val)

case APIC_LVT0:
apic_manage_nmi_watchdog(apic, val);
- /* fall through */
+ fallthrough;
case APIC_LVTTHMR:
case APIC_LVTPC:
case APIC_LVT1:
diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c
index 87e9ba..8593cd 100644
--- a/arch/x86/kvm/mmu/mmu.c
+++ b/arch/x86/kvm/mmu/mmu.c
@@ -4475,7 +4475,7 @@ __reset_rsvds_bits_mask(struct kvm_vcpu *vcpu,
rsvd_bits(maxphyaddr, 51);
rsvd_check->rsvd_bits_mask[1][4] =
rsvd_check->rsvd_bits_mask[0][4];
- /* fall through */
+ fallthrough;
case PT64_ROOT_4LEVEL:
rsvd_check->rsvd_bits_mask[0][3] = exb_bit_rsvd |
nonleaf_bit8_rsvd | rsvd_bits(7, 7) |
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index 910005..73fa903 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -4449,7 +4449,7 @@ static int svm_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr)
case MSR_IA32_APICBASE:
if (kvm_vcpu_apicv_active(vcpu))
avic_update_vapic_bar(to_svm(vcpu), data);
- /* Fall through */
+ fallthrough;
default:
return kvm_set_msr_common(vcpu, msr);
}
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index 69c5bd..1577cd 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -4538,12 +4538,12 @@ static bool rmode_exception(struct kvm_vcpu *vcpu, int vec)
vmcs_read32(VM_EXIT_INSTRUCTION_LEN);
if (vcpu->guest_debug & KVM_GUESTDBG_USE_SW_BP)
return false;
- /* fall through */
+ fallthrough;
case DB_VECTOR:
if (vcpu->guest_debug &
(KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP))
return false;
- /* fall through */
+ fallthrough;
case DE_VECTOR:
case OF_VECTOR:
case BR_VECTOR:
@@ -4692,7 +4692,7 @@ static int handle_exception_nmi(struct kvm_vcpu *vcpu)
}
kvm_run->debug.arch.dr6 = dr6 | DR6_FIXED_1;
kvm_run->debug.arch.dr7 = vmcs_readl(GUEST_DR7);
- /* fall through */
+ fallthrough;
case BP_VECTOR:
/*
* Update instruction length as we may reinject #BP from
@@ -5119,7 +5119,7 @@ static int handle_task_switch(struct kvm_vcpu *vcpu)
error_code =
vmcs_read32(IDT_VECTORING_ERROR_CODE);
}
- /* fall through */
+ fallthrough;
case INTR_TYPE_SOFT_EXCEPTION:
kvm_clear_exception_queue(vcpu);
break;
@@ -5469,8 +5469,7 @@ static int handle_invpcid(struct kvm_vcpu *vcpu)
* global flush. If needed, we could optimize this later by
* keeping track of global entries in shadow page tables.
*/
-
- /* fall-through */
+ fallthrough;
case INVPCID_TYPE_ALL_INCL_GLOBAL:
kvm_mmu_unload(vcpu);
return kvm_skip_emulated_instruction(vcpu);
@@ -6401,7 +6400,7 @@ static void __vmx_complete_interrupts(struct kvm_vcpu *vcpu,
break;
case INTR_TYPE_SOFT_EXCEPTION:
vcpu->arch.event_exit_inst_len = vmcs_read32(instr_len_field);
- /* fall through */
+ fallthrough;
case INTR_TYPE_HARD_EXCEPTION:
if (idt_vectoring_info & VECTORING_INFO_DELIVER_CODE_MASK) {
u32 err = vmcs_read32(error_code_field);
@@ -6411,7 +6410,7 @@ static void __vmx_complete_interrupts(struct kvm_vcpu *vcpu,
break;
case INTR_TYPE_SOFT_INTR:
vcpu->arch.event_exit_inst_len = vmcs_read32(instr_len_field);
- /* fall through */
+ fallthrough;
case INTR_TYPE_EXT_INTR:
kvm_queue_interrupt(vcpu, vector, type == INTR_TYPE_SOFT_INTR);
break;
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 2bbc0e0..e6280e 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -1071,7 +1071,6 @@ static int __kvm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long val)
vcpu->arch.eff_db[dr] = val;
break;
case 4:
- /* fall through */
case 6:
if (val & 0xffffffff00000000ULL)
return -1; /* #GP */
@@ -1079,7 +1078,6 @@ static int __kvm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long val)
kvm_update_dr6(vcpu);
break;
case 5:
- /* fall through */
default: /* 7 */
if (!kvm_dr7_valid(val))
return -1; /* #GP */
@@ -1110,7 +1108,6 @@ int kvm_get_dr(struct kvm_vcpu *vcpu, int dr, unsigned long *val)
*val = vcpu->arch.db[array_index_nospec(dr, size)];
break;
case 4:
- /* fall through */
case 6:
if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)
*val = vcpu->arch.dr6;
@@ -1118,7 +1115,6 @@ int kvm_get_dr(struct kvm_vcpu *vcpu, int dr, unsigned long *val)
*val = kvm_x86_ops->get_dr6(vcpu);
break;
case 5:
- /* fall through */
default: /* 7 */
*val = vcpu->arch.dr7;
break;
@@ -2885,7 +2881,8 @@ int kvm_set_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr_info)

case MSR_K7_PERFCTR0 ... MSR_K7_PERFCTR3:
case MSR_P6_PERFCTR0 ... MSR_P6_PERFCTR1:
- pr = true; /* fall through */
+ pr = true;
+ fallthrough;
case MSR_K7_EVNTSEL0 ... MSR_K7_EVNTSEL3:
case MSR_P6_EVNTSEL0 ... MSR_P6_EVNTSEL1:
if (kvm_pmu_is_valid_msr(vcpu, msr))
@@ -4181,8 +4178,7 @@ static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
case KVM_CAP_HYPERV_SYNIC2:
if (cap->args[0])
return -EINVAL;
- /* fall through */
-
+ fallthrough;
case KVM_CAP_HYPERV_SYNIC:
if (!irqchip_in_kernel(vcpu->kvm))
return -EINVAL;
@@ -8478,7 +8474,7 @@ static inline int vcpu_block(struct kvm *kvm, struct kvm_vcpu *vcpu)
vcpu->arch.pv.pv_unhalted = false;
vcpu->arch.mp_state =
KVM_MP_STATE_RUNNABLE;
- /* fall through */
+ fallthrough;
case KVM_MP_STATE_RUNNABLE:
vcpu->arch.apf.halted = false;
break;
--
2.24.0