x86/xen: no need to explicitly register an NMI callback
Remove xen_enable_nmi() to fix a 64-bit guest crash when registering
the NMI callback on Xen 3.1 and earlier.
It's not needed since the NMI callback is set by a set_trap_table
hypercall (in xen_load_idt() or xen_write_idt_entry()).
It's also broken since it only set the current VCPU's callback.
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Reported-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Tested-by: Vitaly Kuznetsov <vkuznets@redhat.com>
diff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c
index bdd22ec..e366b98 100644
--- a/arch/x86/xen/setup.c
+++ b/arch/x86/xen/setup.c
@@ -594,13 +594,7 @@
}
#endif /* CONFIG_X86_64 */
}
-void xen_enable_nmi(void)
-{
-#ifdef CONFIG_X86_64
- if (register_callback(CALLBACKTYPE_nmi, (char *)nmi))
- BUG();
-#endif
-}
+
void __init xen_pvmmu_arch_setup(void)
{
HYPERVISOR_vm_assist(VMASST_CMD_enable, VMASST_TYPE_4gb_segments);
@@ -615,7 +609,6 @@
xen_enable_sysenter();
xen_enable_syscall();
- xen_enable_nmi();
}
/* This function is not called for HVM domains */