KVM: Drop kvm_get_gdt() in favor of generic linux function

Linux now has native_store_gdt() to do the same. Use it instead of
kvm local version.
Signed-off-by: NGleb Natapov <gleb@redhat.com>
Signed-off-by: NAvi Kivity <avi@redhat.com>

arch/x86/include/asm/kvm_host.h

@@ -723,11 +723,6 @@ static inline void kvm_get_idt(struct desc_ptr *table)
 	asm("sidt %0" : "=m"(*table));
 }
 
-static inline void kvm_get_gdt(struct desc_ptr *table)
-{
-	asm("sgdt %0" : "=m"(*table));
-}
-
 static inline unsigned long kvm_read_tr_base(void)
 {
 	u16 tr;

arch/x86/kvm/svm.c

@@ -368,7 +368,7 @@ static int svm_hardware_enable(void *garbage)
 	sd->max_asid = cpuid_ebx(SVM_CPUID_FUNC) - 1;
 	sd->next_asid = sd->max_asid + 1;
 
-	kvm_get_gdt(&gdt_descr);
+	native_store_gdt(&gdt_descr);
 	gdt = (struct desc_struct *)gdt_descr.address;
 	sd->tss_desc = (struct kvm_ldttss_desc *)(gdt + GDT_ENTRY_TSS);
 

arch/x86/kvm/vmx.c

@@ -603,7 +603,7 @@ static void reload_tss(void)
 	struct desc_ptr gdt;
 	struct desc_struct *descs;
 
-	kvm_get_gdt(&gdt);
+	native_store_gdt(&gdt);
 	descs = (void *)gdt.address;
 	descs[GDT_ENTRY_TSS].type = 9; /* available TSS */
 	load_TR_desc();
@@ -767,7 +767,7 @@ static void vmx_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
 		 * processors.
 		 */
 		vmcs_writel(HOST_TR_BASE, kvm_read_tr_base()); /* 22.2.4 */
-		kvm_get_gdt(&dt);
+		native_store_gdt(&dt);
 		vmcs_writel(HOST_GDTR_BASE, dt.address);   /* 22.2.4 */
 
 		rdmsrl(MSR_IA32_SYSENTER_ESP, sysenter_esp);

arch/x86/kvm/x86.c

@@ -233,7 +233,7 @@ unsigned long segment_base(u16 selector)
 	if (selector == 0)
 		return 0;
 
-	kvm_get_gdt(&gdt);
+	native_store_gdt(&gdt);
 	table_base = gdt.address;
 
 	if (selector & 4) {           /* from ldt */