KVM: x86: Make kvm_lapic_reg_{read,write}() static

Make the low level read/write lapic helpers static, any accesses to the
local APIC from vendor code or non-APIC code should be routed through
proper helpers.

No functional change intended.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20220204214205.3306634-8-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

arch/x86/kvm/lapic.c

@@ -1378,8 +1378,8 @@ static inline struct kvm_lapic *to_lapic(struct kvm_io_device *dev)
 #define APIC_REGS_MASK(first, count) \
 	(APIC_REG_MASK(first) * ((1ull << (count)) - 1))
 
-int kvm_lapic_reg_read(struct kvm_lapic *apic, u32 offset, int len,
-		void *data)
+static int kvm_lapic_reg_read(struct kvm_lapic *apic, u32 offset, int len,
+			      void *data)
 {
 	unsigned char alignment = offset & 0xf;
 	u32 result;
@@ -1435,7 +1435,6 @@ int kvm_lapic_reg_read(struct kvm_lapic *apic, u32 offset, int len,
 	}
 	return 0;
 }
-EXPORT_SYMBOL_GPL(kvm_lapic_reg_read);
 
 static int apic_mmio_in_range(struct kvm_lapic *apic, gpa_t addr)
 {
@@ -1996,7 +1995,7 @@ static void apic_manage_nmi_watchdog(struct kvm_lapic *apic, u32 lvt0_val)
 	}
 }
 
-int kvm_lapic_reg_write(struct kvm_lapic *apic, u32 reg, u32 val)
+static int kvm_lapic_reg_write(struct kvm_lapic *apic, u32 reg, u32 val)
 {
 	int ret = 0;
 
@@ -2143,7 +2142,6 @@ int kvm_lapic_reg_write(struct kvm_lapic *apic, u32 reg, u32 val)
 
 	return ret;
 }
-EXPORT_SYMBOL_GPL(kvm_lapic_reg_write);
 
 static int apic_mmio_write(struct kvm_vcpu *vcpu, struct kvm_io_device *this,
 			    gpa_t address, int len, const void *data)

arch/x86/kvm/lapic.h

@@ -85,9 +85,6 @@ void kvm_lapic_set_base(struct kvm_vcpu *vcpu, u64 value);
 u64 kvm_lapic_get_base(struct kvm_vcpu *vcpu);
 void kvm_recalculate_apic_map(struct kvm *kvm);
 void kvm_apic_set_version(struct kvm_vcpu *vcpu);
-int kvm_lapic_reg_write(struct kvm_lapic *apic, u32 reg, u32 val);
-int kvm_lapic_reg_read(struct kvm_lapic *apic, u32 offset, int len,
-		       void *data);
 bool kvm_apic_match_dest(struct kvm_vcpu *vcpu, struct kvm_lapic *source,
 			   int shorthand, unsigned int dest, int dest_mode);
 int kvm_apic_compare_prio(struct kvm_vcpu *vcpu1, struct kvm_vcpu *vcpu2);