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

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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>
This commit is contained in:
Akinobu Mita 2009-07-19 00:00:01 +09:00 committed by Avi Kivity
parent 46a359e715
commit b792c344df
2 changed files with 5 additions and 6 deletions
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6
arch/x86/kvm/svm.c
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@ -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);

5
arch/x86/kvm/x86.c
View file

@ -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));