2 # From Coreboot src/northbridge/intel/sandybridge/Kconfig
4 # Copyright (C) 2010 Google Inc.
6 # SPDX-License-Identifier: GPL-2.0
8 config NORTHBRIDGE_INTEL_IVYBRIDGE
10 select CACHE_MRC_BIN if HAVE_MRC
13 if NORTHBRIDGE_INTEL_IVYBRIDGE
15 config DCACHE_RAM_BASE
18 config DCACHE_RAM_SIZE
21 config DCACHE_RAM_MRC_VAR_SIZE
24 config CPU_SPECIFIC_OPTIONS
34 bool "Enable VMX for virtualization"
37 Virtual Machine Extensions are provided in many x86 CPUs. These
38 provide various facilities for allowing a host OS to provide an
39 environment where potentially several guest OSes have only
40 limited access to the underlying hardware. This is achieved
41 without resorting to software trapping and/or instruction set
42 emulation (which would be very slow).
44 Intel's implementation of this is called VT-x. This option enables
45 VT-x this so that the OS that is booted by U-Boot can make use of
46 these facilities. If this option is not enabled, then the host OS
47 will be unable to support virtualisation, or it will run very