KVM: VMX: Rename "vmx_msr_index" to "vmx_uret_msrs_list"

Rename "vmx_msr_index" to "vmx_uret_msrs_list" to associate it with the
uret MSRs array, and to avoid conflating "MSR's ECX index" with "MSR's
index into an array".  Similarly, don't use "slot" in the name as that
terminology is claimed by the common x86 "user_return_msrs" mechanism.

No functional change intended.
Signed-off-by: NSean Christopherson <sean.j.christopherson@intel.com>
Message-Id: <20200923180409.32255-15-sean.j.christopherson@intel.com>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>

arch/x86/kvm/vmx/vmx.c

@@ -435,9 +435,9 @@ static unsigned long host_idt_base;
  * will emulate SYSCALL in legacy mode if the vendor string in guest
  * CPUID.0:{EBX,ECX,EDX} is "AuthenticAMD" or "AMDisbetter!" To
  * support this emulation, IA32_STAR must always be included in
- * vmx_msr_index[], even in i386 builds.
+ * vmx_uret_msrs_list[], even in i386 builds.
  */
-const u32 vmx_msr_index[] = {
+const u32 vmx_uret_msrs_list[] = {
 #ifdef CONFIG_X86_64
 	MSR_SYSCALL_MASK, MSR_LSTAR, MSR_CSTAR,
 #endif
@@ -616,7 +616,7 @@ static inline int __vmx_find_uret_msr(struct vcpu_vmx *vmx, u32 msr)
 	int i;
 
 	for (i = 0; i < vmx->nr_uret_msrs; ++i)
-		if (vmx_msr_index[vmx->guest_uret_msrs[i].index] == msr)
+		if (vmx_uret_msrs_list[vmx->guest_uret_msrs[i].index] == msr)
 			return i;
 	return -1;
 }
@@ -6718,10 +6718,10 @@ static int vmx_create_vcpu(struct kvm_vcpu *vcpu)
 			goto free_vpid;
 	}
 
-	BUILD_BUG_ON(ARRAY_SIZE(vmx_msr_index) != MAX_NR_USER_RETURN_MSRS);
+	BUILD_BUG_ON(ARRAY_SIZE(vmx_uret_msrs_list) != MAX_NR_USER_RETURN_MSRS);
 
-	for (i = 0; i < ARRAY_SIZE(vmx_msr_index); ++i) {
-		u32 index = vmx_msr_index[i];
+	for (i = 0; i < ARRAY_SIZE(vmx_uret_msrs_list); ++i) {
+		u32 index = vmx_uret_msrs_list[i];
 		u32 data_low, data_high;
 		int j = vmx->nr_uret_msrs;
 
@@ -7577,8 +7577,8 @@ static __init int hardware_setup(void)
 	store_idt(&dt);
 	host_idt_base = dt.address;
 
-	for (i = 0; i < ARRAY_SIZE(vmx_msr_index); ++i)
-		kvm_define_user_return_msr(i, vmx_msr_index[i]);
+	for (i = 0; i < ARRAY_SIZE(vmx_uret_msrs_list); ++i)
+		kvm_define_user_return_msr(i, vmx_uret_msrs_list[i]);
 
 	if (setup_vmcs_config(&vmcs_config, &vmx_capability) < 0)
 		return -EIO;