KVM: x86: use kvm_get_gdt() and kvm_read_ldt()

Use kvm_get_gdt() and kvm_read_ldt() to reduce inline assembly code.

Cc: Avi Kivity <avi@redhat.com>
Cc: kvm@vger.kernel.org
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

2 files changed, 5 insertions, 6 deletions

diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index 8728e514c851..92fc0dab505d 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -290,7 +290,7 @@ static void svm_hardware_enable(void *garbage)
 
         struct svm_cpu_data *svm_data;
         uint64_t efer;
-        struct desc_ptr gdt_descr;
+        struct descriptor_table gdt_descr;
         struct desc_struct *gdt;
         int me = raw_smp_processor_id();
 
@@ -310,8 +310,8 @@ static void svm_hardware_enable(void *garbage)
         svm_data->max_asid = cpuid_ebx(SVM_CPUID_FUNC) - 1;
         svm_data->next_asid = svm_data->max_asid + 1;
 
-        asm volatile ("sgdt %0" : "=m"(gdt_descr));
-        gdt = (struct desc_struct *)gdt_descr.address;
+        kvm_get_gdt(&gdt_descr);
+        gdt = (struct desc_struct *)gdt_descr.base;
         svm_data->tss_desc = (struct kvm_ldttss_desc *)(gdt + GDT_ENTRY_TSS);
 
         rdmsrl(MSR_EFER, efer);
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 6277a316821e..c7ec0c921c01 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -132,13 +132,12 @@ unsigned long segment_base(u16 selector)
         if (selector == 0)
                 return 0;
 
-        asm("sgdt %0" : "=m"(gdt));
+        kvm_get_gdt(&gdt);
         table_base = gdt.base;
 
         if (selector & 4) {           /* from ldt */
-                u16 ldt_selector;
+                u16 ldt_selector = kvm_read_ldt();
 
-                asm("sldt %0" : "=g"(ldt_selector));
                 table_base = segment_base(ldt_selector);
         }
         d = (struct desc_struct *)(table_base + (selector & ~7));