1# SPDX-License-Identifier: GPL-2.0 2# 3# KVM configuration 4# 5 6source "virt/kvm/Kconfig" 7 8menuconfig VIRTUALIZATION 9 bool "Virtualization" 10 depends on HAVE_KVM || X86 11 default y 12 help 13 Say Y here to get to see options for using your Linux host to run other 14 operating systems inside virtual machines (guests). 15 This option alone does not add any kernel code. 16 17 If you say N, all options in this submenu will be skipped and disabled. 18 19if VIRTUALIZATION 20 21config KVM 22 tristate "Kernel-based Virtual Machine (KVM) support" 23 depends on HAVE_KVM 24 depends on HIGH_RES_TIMERS 25 depends on X86_LOCAL_APIC 26 select PREEMPT_NOTIFIERS 27 select MMU_NOTIFIER 28 select HAVE_KVM_IRQCHIP 29 select HAVE_KVM_PFNCACHE 30 select HAVE_KVM_IRQFD 31 select HAVE_KVM_DIRTY_RING_TSO 32 select HAVE_KVM_DIRTY_RING_ACQ_REL 33 select IRQ_BYPASS_MANAGER 34 select HAVE_KVM_IRQ_BYPASS 35 select HAVE_KVM_IRQ_ROUTING 36 select HAVE_KVM_EVENTFD 37 select KVM_ASYNC_PF 38 select USER_RETURN_NOTIFIER 39 select KVM_MMIO 40 select SCHED_INFO 41 select PERF_EVENTS 42 select GUEST_PERF_EVENTS 43 select HAVE_KVM_MSI 44 select HAVE_KVM_CPU_RELAX_INTERCEPT 45 select HAVE_KVM_NO_POLL 46 select KVM_XFER_TO_GUEST_WORK 47 select KVM_GENERIC_DIRTYLOG_READ_PROTECT 48 select KVM_VFIO 49 select SRCU 50 select INTERVAL_TREE 51 select HAVE_KVM_PM_NOTIFIER if PM 52 select KVM_GENERIC_HARDWARE_ENABLING 53 help 54 Support hosting fully virtualized guest machines using hardware 55 virtualization extensions. You will need a fairly recent 56 processor equipped with virtualization extensions. You will also 57 need to select one or more of the processor modules below. 58 59 This module provides access to the hardware capabilities through 60 a character device node named /dev/kvm. 61 62 To compile this as a module, choose M here: the module 63 will be called kvm. 64 65 If unsure, say N. 66 67config KVM_WERROR 68 bool "Compile KVM with -Werror" 69 # KASAN may cause the build to fail due to larger frames 70 default y if X86_64 && !KASAN 71 # We use the dependency on !COMPILE_TEST to not be enabled 72 # blindly in allmodconfig or allyesconfig configurations 73 depends on KVM 74 depends on (X86_64 && !KASAN) || !COMPILE_TEST 75 depends on EXPERT 76 help 77 Add -Werror to the build flags for KVM. 78 79 If in doubt, say "N". 80 81config KVM_INTEL 82 tristate "KVM for Intel (and compatible) processors support" 83 depends on KVM && IA32_FEAT_CTL 84 help 85 Provides support for KVM on processors equipped with Intel's VT 86 extensions, a.k.a. Virtual Machine Extensions (VMX). 87 88 To compile this as a module, choose M here: the module 89 will be called kvm-intel. 90 91config X86_SGX_KVM 92 bool "Software Guard eXtensions (SGX) Virtualization" 93 depends on X86_SGX && KVM_INTEL 94 help 95 96 Enables KVM guests to create SGX enclaves. 97 98 This includes support to expose "raw" unreclaimable enclave memory to 99 guests via a device node, e.g. /dev/sgx_vepc. 100 101 If unsure, say N. 102 103config KVM_AMD 104 tristate "KVM for AMD processors support" 105 depends on KVM 106 help 107 Provides support for KVM on AMD processors equipped with the AMD-V 108 (SVM) extensions. 109 110 To compile this as a module, choose M here: the module 111 will be called kvm-amd. 112 113config KVM_AMD_SEV 114 def_bool y 115 bool "AMD Secure Encrypted Virtualization (SEV) support" 116 depends on KVM_AMD && X86_64 117 depends on CRYPTO_DEV_SP_PSP && !(KVM_AMD=y && CRYPTO_DEV_CCP_DD=m) 118 help 119 Provides support for launching Encrypted VMs (SEV) and Encrypted VMs 120 with Encrypted State (SEV-ES) on AMD processors. 121 122config KVM_SMM 123 bool "System Management Mode emulation" 124 default y 125 depends on KVM 126 help 127 Provides support for KVM to emulate System Management Mode (SMM) 128 in virtual machines. This can be used by the virtual machine 129 firmware to implement UEFI secure boot. 130 131 If unsure, say Y. 132 133config KVM_XEN 134 bool "Support for Xen hypercall interface" 135 depends on KVM 136 help 137 Provides KVM support for the hosting Xen HVM guests and 138 passing Xen hypercalls to userspace. 139 140 If in doubt, say "N". 141 142config KVM_EXTERNAL_WRITE_TRACKING 143 bool 144 145endif # VIRTUALIZATION 146