1# 2# KVM configuration 3# 4 5source "virt/kvm/Kconfig" 6 7menuconfig VIRTUALIZATION 8 bool "Virtualization" 9 ---help--- 10 Say Y here to get to see options for using your Linux host to run 11 other operating systems inside virtual machines (guests). 12 This option alone does not add any kernel code. 13 14 If you say N, all options in this submenu will be skipped and 15 disabled. 16 17if VIRTUALIZATION 18 19config KVM 20 bool 21 select PREEMPT_NOTIFIERS 22 select ANON_INODES 23 select HAVE_KVM_EVENTFD 24 25config KVM_BOOK3S_HANDLER 26 bool 27 28config KVM_BOOK3S_32_HANDLER 29 bool 30 select KVM_BOOK3S_HANDLER 31 select KVM_MMIO 32 33config KVM_BOOK3S_64_HANDLER 34 bool 35 select KVM_BOOK3S_HANDLER 36 37config KVM_BOOK3S_PR_POSSIBLE 38 bool 39 select KVM_MMIO 40 select MMU_NOTIFIER 41 42config KVM_BOOK3S_HV_POSSIBLE 43 bool 44 45config KVM_BOOK3S_32 46 tristate "KVM support for PowerPC book3s_32 processors" 47 depends on PPC_BOOK3S_32 && !SMP && !PTE_64BIT 48 select KVM 49 select KVM_BOOK3S_32_HANDLER 50 select KVM_BOOK3S_PR_POSSIBLE 51 ---help--- 52 Support running unmodified book3s_32 guest kernels 53 in virtual machines on book3s_32 host processors. 54 55 This module provides access to the hardware capabilities through 56 a character device node named /dev/kvm. 57 58 If unsure, say N. 59 60config KVM_BOOK3S_64 61 tristate "KVM support for PowerPC book3s_64 processors" 62 depends on PPC_BOOK3S_64 63 select KVM_BOOK3S_64_HANDLER 64 select KVM 65 select KVM_BOOK3S_PR_POSSIBLE if !KVM_BOOK3S_HV_POSSIBLE 66 ---help--- 67 Support running unmodified book3s_64 and book3s_32 guest kernels 68 in virtual machines on book3s_64 host processors. 69 70 This module provides access to the hardware capabilities through 71 a character device node named /dev/kvm. 72 73 If unsure, say N. 74 75config KVM_BOOK3S_64_HV 76 tristate "KVM support for POWER7 and PPC970 using hypervisor mode in host" 77 depends on KVM_BOOK3S_64 78 depends on !CPU_LITTLE_ENDIAN 79 select KVM_BOOK3S_HV_POSSIBLE 80 select MMU_NOTIFIER 81 select CMA 82 ---help--- 83 Support running unmodified book3s_64 guest kernels in 84 virtual machines on POWER7 and PPC970 processors that have 85 hypervisor mode available to the host. 86 87 If you say Y here, KVM will use the hardware virtualization 88 facilities of POWER7 (and later) processors, meaning that 89 guest operating systems will run at full hardware speed 90 using supervisor and user modes. However, this also means 91 that KVM is not usable under PowerVM (pHyp), is only usable 92 on POWER7 (or later) processors and PPC970-family processors, 93 and cannot emulate a different processor from the host processor. 94 95 If unsure, say N. 96 97config KVM_BOOK3S_64_PR 98 tristate "KVM support without using hypervisor mode in host" 99 depends on KVM_BOOK3S_64 100 select KVM_BOOK3S_PR_POSSIBLE 101 ---help--- 102 Support running guest kernels in virtual machines on processors 103 without using hypervisor mode in the host, by running the 104 guest in user mode (problem state) and emulating all 105 privileged instructions and registers. 106 107 This is not as fast as using hypervisor mode, but works on 108 machines where hypervisor mode is not available or not usable, 109 and can emulate processors that are different from the host 110 processor, including emulating 32-bit processors on a 64-bit 111 host. 112 113config KVM_BOOKE_HV 114 bool 115 116config KVM_440 117 bool "KVM support for PowerPC 440 processors" 118 depends on 44x 119 select KVM 120 select KVM_MMIO 121 ---help--- 122 Support running unmodified 440 guest kernels in virtual machines on 123 440 host processors. 124 125 This module provides access to the hardware capabilities through 126 a character device node named /dev/kvm. 127 128 If unsure, say N. 129 130config KVM_EXIT_TIMING 131 bool "Detailed exit timing" 132 depends on KVM_440 || KVM_E500V2 || KVM_E500MC 133 ---help--- 134 Calculate elapsed time for every exit/enter cycle. A per-vcpu 135 report is available in debugfs kvm/vm#_vcpu#_timing. 136 The overhead is relatively small, however it is not recommended for 137 production environments. 138 139 If unsure, say N. 140 141config KVM_E500V2 142 bool "KVM support for PowerPC E500v2 processors" 143 depends on E500 && !PPC_E500MC 144 select KVM 145 select KVM_MMIO 146 select MMU_NOTIFIER 147 ---help--- 148 Support running unmodified E500 guest kernels in virtual machines on 149 E500v2 host processors. 150 151 This module provides access to the hardware capabilities through 152 a character device node named /dev/kvm. 153 154 If unsure, say N. 155 156config KVM_E500MC 157 bool "KVM support for PowerPC E500MC/E5500/E6500 processors" 158 depends on PPC_E500MC 159 select KVM 160 select KVM_MMIO 161 select KVM_BOOKE_HV 162 select MMU_NOTIFIER 163 ---help--- 164 Support running unmodified E500MC/E5500/E6500 guest kernels in 165 virtual machines on E500MC/E5500/E6500 host processors. 166 167 This module provides access to the hardware capabilities through 168 a character device node named /dev/kvm. 169 170 If unsure, say N. 171 172config KVM_MPIC 173 bool "KVM in-kernel MPIC emulation" 174 depends on KVM && E500 175 select HAVE_KVM_IRQCHIP 176 select HAVE_KVM_IRQ_ROUTING 177 select HAVE_KVM_MSI 178 help 179 Enable support for emulating MPIC devices inside the 180 host kernel, rather than relying on userspace to emulate. 181 Currently, support is limited to certain versions of 182 Freescale's MPIC implementation. 183 184config KVM_XICS 185 bool "KVM in-kernel XICS emulation" 186 depends on KVM_BOOK3S_64 && !KVM_MPIC 187 ---help--- 188 Include support for the XICS (eXternal Interrupt Controller 189 Specification) interrupt controller architecture used on 190 IBM POWER (pSeries) servers. 191 192source drivers/vhost/Kconfig 193 194endif # VIRTUALIZATION 195