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 select SRCU 25 26config KVM_BOOK3S_HANDLER 27 bool 28 29config KVM_BOOK3S_32_HANDLER 30 bool 31 select KVM_BOOK3S_HANDLER 32 select KVM_MMIO 33 34config KVM_BOOK3S_64_HANDLER 35 bool 36 select KVM_BOOK3S_HANDLER 37 38config KVM_BOOK3S_PR_POSSIBLE 39 bool 40 select KVM_MMIO 41 select MMU_NOTIFIER 42 43config KVM_BOOK3S_HV_POSSIBLE 44 bool 45 46config KVM_BOOK3S_32 47 tristate "KVM support for PowerPC book3s_32 processors" 48 depends on PPC_BOOK3S_32 && !SMP && !PTE_64BIT 49 select KVM 50 select KVM_BOOK3S_32_HANDLER 51 select KVM_BOOK3S_PR_POSSIBLE 52 ---help--- 53 Support running unmodified book3s_32 guest kernels 54 in virtual machines on book3s_32 host processors. 55 56 This module provides access to the hardware capabilities through 57 a character device node named /dev/kvm. 58 59 If unsure, say N. 60 61config KVM_BOOK3S_64 62 tristate "KVM support for PowerPC book3s_64 processors" 63 depends on PPC_BOOK3S_64 64 select KVM_BOOK3S_64_HANDLER 65 select KVM 66 select KVM_BOOK3S_PR_POSSIBLE if !KVM_BOOK3S_HV_POSSIBLE 67 ---help--- 68 Support running unmodified book3s_64 and book3s_32 guest kernels 69 in virtual machines on book3s_64 host processors. 70 71 This module provides access to the hardware capabilities through 72 a character device node named /dev/kvm. 73 74 If unsure, say N. 75 76config KVM_BOOK3S_64_HV 77 tristate "KVM support for POWER7 and PPC970 using hypervisor mode in host" 78 depends on KVM_BOOK3S_64 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_EXIT_TIMING 117 bool "Detailed exit timing" 118 depends on KVM_E500V2 || KVM_E500MC 119 ---help--- 120 Calculate elapsed time for every exit/enter cycle. A per-vcpu 121 report is available in debugfs kvm/vm#_vcpu#_timing. 122 The overhead is relatively small, however it is not recommended for 123 production environments. 124 125 If unsure, say N. 126 127config KVM_E500V2 128 bool "KVM support for PowerPC E500v2 processors" 129 depends on E500 && !PPC_E500MC 130 select KVM 131 select KVM_MMIO 132 select MMU_NOTIFIER 133 ---help--- 134 Support running unmodified E500 guest kernels in virtual machines on 135 E500v2 host processors. 136 137 This module provides access to the hardware capabilities through 138 a character device node named /dev/kvm. 139 140 If unsure, say N. 141 142config KVM_E500MC 143 bool "KVM support for PowerPC E500MC/E5500/E6500 processors" 144 depends on PPC_E500MC 145 select KVM 146 select KVM_MMIO 147 select KVM_BOOKE_HV 148 select MMU_NOTIFIER 149 ---help--- 150 Support running unmodified E500MC/E5500/E6500 guest kernels in 151 virtual machines on E500MC/E5500/E6500 host processors. 152 153 This module provides access to the hardware capabilities through 154 a character device node named /dev/kvm. 155 156 If unsure, say N. 157 158config KVM_MPIC 159 bool "KVM in-kernel MPIC emulation" 160 depends on KVM && E500 161 select HAVE_KVM_IRQCHIP 162 select HAVE_KVM_IRQFD 163 select HAVE_KVM_IRQ_ROUTING 164 select HAVE_KVM_MSI 165 help 166 Enable support for emulating MPIC devices inside the 167 host kernel, rather than relying on userspace to emulate. 168 Currently, support is limited to certain versions of 169 Freescale's MPIC implementation. 170 171config KVM_XICS 172 bool "KVM in-kernel XICS emulation" 173 depends on KVM_BOOK3S_64 && !KVM_MPIC 174 select HAVE_KVM_IRQCHIP 175 select HAVE_KVM_IRQFD 176 default y 177 ---help--- 178 Include support for the XICS (eXternal Interrupt Controller 179 Specification) interrupt controller architecture used on 180 IBM POWER (pSeries) servers. 181 182source drivers/vhost/Kconfig 183 184endif # VIRTUALIZATION 185