x86/paravirt, 64-bit: make load_gs_index() a paravirt operation

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: xen-devel <xen-devel@lists.xensource.com>
Cc: Stephen Tweedie <sct@redhat.com>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Cc: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

2 files changed, 5 insertions, 2 deletions

diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S
index 70fe13a1c41d..07d69f262337 100644
--- a/arch/x86/kernel/entry_64.S
+++ b/arch/x86/kernel/entry_64.S
@@ -944,7 +944,7 @@ KPROBE_END(error_entry)
         
        /* Reload gs selector with exception handling */
        /* edi:  new selector */ 
-ENTRY(load_gs_index)
+ENTRY(native_load_gs_index)
         CFI_STARTPROC
         pushf
         CFI_ADJUST_CFA_OFFSET 8
@@ -958,7 +958,7 @@ gs_change:
         CFI_ADJUST_CFA_OFFSET -8
         ret
         CFI_ENDPROC
-ENDPROC(load_gs_index)
+ENDPROC(native_load_gs_index)
        
         .section __ex_table,"a"
         .align 8
diff --git a/arch/x86/kernel/paravirt.c b/arch/x86/kernel/paravirt.c
index b20c369cb89d..27819e3e4245 100644
--- a/arch/x86/kernel/paravirt.c
+++ b/arch/x86/kernel/paravirt.c
@@ -329,6 +329,9 @@ struct pv_cpu_ops pv_cpu_ops = {
         .store_idt = native_store_idt,
         .store_tr = native_store_tr,
         .load_tls = native_load_tls,
+#ifdef CONFIG_X86_64
+        .load_gs_index = native_load_gs_index,
+#endif
         .write_ldt_entry = native_write_ldt_entry,
         .write_gdt_entry = native_write_gdt_entry,
         .write_idt_entry = native_write_idt_entry,