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charset="utf-8" Both the 4Gb-segments and the PAE-extended-CR3 one are applicable to 32-bit guests only. The PAE-extended-CR3 use, furthermore, was redundant with the PAE_MODE ELF note anyway. Signed-off-by: Jan Beulich Reviewed-by: Juergen Gross --- a/arch/x86/xen/setup.c +++ b/arch/x86/xen/setup.c @@ -934,12 +934,8 @@ void xen_enable_syscall(void) =20 static void __init xen_pvmmu_arch_setup(void) { - HYPERVISOR_vm_assist(VMASST_CMD_enable, VMASST_TYPE_4gb_segments); HYPERVISOR_vm_assist(VMASST_CMD_enable, VMASST_TYPE_writable_pagetables); =20 - HYPERVISOR_vm_assist(VMASST_CMD_enable, - VMASST_TYPE_pae_extended_cr3); - if (register_callback(CALLBACKTYPE_event, xen_asm_exc_xen_hypervisor_callback) || register_callback(CALLBACKTYPE_failsafe, xen_failsafe_callback))