KVM: x86: Rename get_msr_feature() APIs to get_feature_msr()

Rename all APIs related to feature MSRs from get_msr_feature() to
get_feature_msr().  The APIs get "feature MSRs", not "MSR features".
And unlike kvm_{g,s}et_msr_common(), the "feature" adjective doesn't
describe the helper itself.

No functional change intended.

Link: https://lore.kernel.org/r/20240802181935.292540-6-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>

Author: sean-jc

arch/x86/include/asm/kvm-x86-ops.h

@@ -125,7 +125,7 @@ KVM_X86_OP_OPTIONAL(mem_enc_unregister_region)
 KVM_X86_OP_OPTIONAL(vm_copy_enc_context_from)
 KVM_X86_OP_OPTIONAL(vm_move_enc_context_from)
 KVM_X86_OP_OPTIONAL(guest_memory_reclaimed)
-KVM_X86_OP(get_msr_feature)
+KVM_X86_OP(get_feature_msr)
 KVM_X86_OP(check_emulate_instruction)
 KVM_X86_OP(apic_init_signal_blocked)
 KVM_X86_OP_OPTIONAL(enable_l2_tlb_flush)

arch/x86/include/asm/kvm_host.h

@@ -1806,7 +1806,7 @@ struct kvm_x86_ops {
 	int (*vm_move_enc_context_from)(struct kvm *kvm, unsigned int source_fd);
 	void (*guest_memory_reclaimed)(struct kvm *kvm);
 
-	int (*get_msr_feature)(u32 msr, u64 *data);
+	int (*get_feature_msr)(u32 msr, u64 *data);
 
 	int (*check_emulate_instruction)(struct kvm_vcpu *vcpu, int emul_type,
 					 void *insn, int insn_len);

arch/x86/kvm/svm/svm.c

@@ -2825,7 +2825,7 @@ static int efer_trap(struct kvm_vcpu *vcpu)
 	return kvm_complete_insn_gp(vcpu, ret);
 }
 
-static int svm_get_msr_feature(u32 msr, u64 *data)
+static int svm_get_feature_msr(u32 msr, u64 *data)
 {
 	*data = 0;
 
@@ -3181,7 +3181,7 @@ static int svm_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr)
 	case MSR_AMD64_DE_CFG: {
 		u64 supported_de_cfg;
 
-		if (svm_get_msr_feature(ecx, &supported_de_cfg))
+		if (svm_get_feature_msr(ecx, &supported_de_cfg))
 			return 1;
 
 		if (data & ~supported_de_cfg)
@@ -5002,7 +5002,7 @@ static struct kvm_x86_ops svm_x86_ops __initdata = {
 	.vcpu_unblocking = avic_vcpu_unblocking,
 
 	.update_exception_bitmap = svm_update_exception_bitmap,
-	.get_msr_feature = svm_get_msr_feature,
+	.get_feature_msr = svm_get_feature_msr,
 	.get_msr = svm_get_msr,
 	.set_msr = svm_set_msr,
 	.get_segment_base = svm_get_segment_base,

arch/x86/kvm/vmx/main.c

@@ -41,7 +41,7 @@ struct kvm_x86_ops vt_x86_ops __initdata = {
 	.vcpu_put = vmx_vcpu_put,
 
 	.update_exception_bitmap = vmx_update_exception_bitmap,
-	.get_msr_feature = vmx_get_msr_feature,
+	.get_feature_msr = vmx_get_feature_msr,
 	.get_msr = vmx_get_msr,
 	.set_msr = vmx_set_msr,
 	.get_segment_base = vmx_get_segment_base,

arch/x86/kvm/vmx/vmx.c

@@ -1998,7 +1998,7 @@ static inline bool is_vmx_feature_control_msr_valid(struct vcpu_vmx *vmx,
 	return !(msr->data & ~valid_bits);
 }
 
-int vmx_get_msr_feature(u32 msr, u64 *data)
+int vmx_get_feature_msr(u32 msr, u64 *data)
 {
 	switch (msr) {
 	case KVM_FIRST_EMULATED_VMX_MSR ... KVM_LAST_EMULATED_VMX_MSR:

arch/x86/kvm/vmx/x86_ops.h

@@ -56,7 +56,7 @@ bool vmx_has_emulated_msr(struct kvm *kvm, u32 index);
 void vmx_msr_filter_changed(struct kvm_vcpu *vcpu);
 void vmx_prepare_switch_to_guest(struct kvm_vcpu *vcpu);
 void vmx_update_exception_bitmap(struct kvm_vcpu *vcpu);
-int vmx_get_msr_feature(u32 msr, u64 *data);
+int vmx_get_feature_msr(u32 msr, u64 *data);
 int vmx_get_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info);
 u64 vmx_get_segment_base(struct kvm_vcpu *vcpu, int seg);
 void vmx_get_segment(struct kvm_vcpu *vcpu, struct kvm_segment *var, int seg);

arch/x86/kvm/x86.c

@@ -1659,7 +1659,7 @@ static u64 kvm_get_arch_capabilities(void)
 	return data;
 }
 
-static int kvm_get_msr_feature(struct kvm_msr_entry *msr)
+static int kvm_get_feature_msr(struct kvm_msr_entry *msr)
 {
 	switch (msr->index) {
 	case MSR_IA32_ARCH_CAPABILITIES:
@@ -1672,20 +1672,20 @@ static int kvm_get_msr_feature(struct kvm_msr_entry *msr)
 		rdmsrl_safe(msr->index, &msr->data);
 		break;
 	default:
-		return kvm_x86_call(get_msr_feature)(msr->index, &msr->data);
+		return kvm_x86_call(get_feature_msr)(msr->index, &msr->data);
 	}
 	return 0;
 }
 
-static int do_get_msr_feature(struct kvm_vcpu *vcpu, unsigned index, u64 *data)
+static int do_get_feature_msr(struct kvm_vcpu *vcpu, unsigned index, u64 *data)
 {
 	struct kvm_msr_entry msr;
 	int r;
 
 	/* Unconditionally clear the output for simplicity */
 	msr.data = 0;
 	msr.index = index;
-	r = kvm_get_msr_feature(&msr);
+	r = kvm_get_feature_msr(&msr);
 
 	if (r == KVM_MSR_RET_UNSUPPORTED && kvm_msr_ignored_check(index, 0, false))
 		r = 0;
@@ -4943,7 +4943,7 @@ long kvm_arch_dev_ioctl(struct file *filp,
 		break;
 	}
 	case KVM_GET_MSRS:
-		r = msr_io(NULL, argp, do_get_msr_feature, 1);
+		r = msr_io(NULL, argp, do_get_feature_msr, 1);
 		break;
 #ifdef CONFIG_KVM_HYPERV
 	case KVM_GET_SUPPORTED_HV_CPUID:
@@ -7382,7 +7382,7 @@ static void kvm_probe_feature_msr(u32 msr_index)
 		.index = msr_index,
 	};
 
-	if (kvm_get_msr_feature(&msr))
+	if (kvm_get_feature_msr(&msr))
 		return;
 
 	msr_based_features[num_msr_based_features++] = msr_index;