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Subject[PATCH 43 of 55] xen64: implement xen_load_gs_index()
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From: Eduardo Habkost <ehabkost@redhat.com>

xen-64: implement xen_load_gs_index()

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
---
arch/x86/xen/enlighten.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -384,6 +384,14 @@
if (paravirt_get_lazy_mode() == PARAVIRT_LAZY_CPU)
loadsegment(gs, 0);
}
+
+#ifdef CONFIG_X86_64
+static void xen_load_gs_index(unsigned int idx)
+{
+ if (HYPERVISOR_set_segment_base(SEGBASE_GS_USER_SEL, idx))
+ BUG();
+}
+#endif

static void xen_write_ldt_entry(struct desc_struct *dt, int entrynum,
const void *ptr)
@@ -1063,6 +1071,9 @@
.load_gdt = xen_load_gdt,
.load_idt = xen_load_idt,
.load_tls = xen_load_tls,
+#ifdef CONFIG_X86_64
+ .load_gs_index = xen_load_gs_index,
+#endif

.store_gdt = native_store_gdt,
.store_idt = native_store_idt,



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