1# SPDX-License-Identifier: GPL-2.0 2# 3# KVM configuration 4# 5 6source "virt/kvm/Kconfig" 7 8menuconfig VIRTUALIZATION 9 bool "Virtualization" 10 help 11 Say Y here to get to see options for using your Linux host to run 12 other operating systems inside virtual machines (guests). 13 This option alone does not add any kernel code. 14 15 If you say N, all options in this submenu will be skipped and 16 disabled. 17 18if VIRTUALIZATION 19 20config KVM 21 bool 22 select PREEMPT_NOTIFIERS 23 select HAVE_KVM_EVENTFD 24 select HAVE_KVM_VCPU_ASYNC_IOCTL 25 select SRCU 26 select KVM_VFIO 27 select IRQ_BYPASS_MANAGER 28 select HAVE_KVM_IRQ_BYPASS 29 30config KVM_BOOK3S_HANDLER 31 bool 32 33config KVM_BOOK3S_32_HANDLER 34 bool 35 select KVM_BOOK3S_HANDLER 36 select KVM_MMIO 37 38config KVM_BOOK3S_64_HANDLER 39 bool 40 select KVM_BOOK3S_HANDLER 41 select PPC_DAWR_FORCE_ENABLE 42 43config KVM_BOOK3S_PR_POSSIBLE 44 bool 45 select KVM_MMIO 46 select MMU_NOTIFIER 47 48config KVM_BOOK3S_HV_POSSIBLE 49 bool 50 51config KVM_BOOK3S_32 52 tristate "KVM support for PowerPC book3s_32 processors" 53 depends on PPC_BOOK3S_32 && !SMP && !PTE_64BIT 54 select KVM 55 select KVM_BOOK3S_32_HANDLER 56 select KVM_BOOK3S_PR_POSSIBLE 57 select PPC_FPU 58 help 59 Support running unmodified book3s_32 guest kernels 60 in virtual machines on book3s_32 host processors. 61 62 This module provides access to the hardware capabilities through 63 a character device node named /dev/kvm. 64 65 If unsure, say N. 66 67config KVM_BOOK3S_64 68 tristate "KVM support for PowerPC book3s_64 processors" 69 depends on PPC_BOOK3S_64 70 select KVM_BOOK3S_64_HANDLER 71 select KVM 72 select KVM_BOOK3S_PR_POSSIBLE if !KVM_BOOK3S_HV_POSSIBLE 73 select SPAPR_TCE_IOMMU if IOMMU_SUPPORT && (PPC_PSERIES || PPC_POWERNV) 74 help 75 Support running unmodified book3s_64 and book3s_32 guest kernels 76 in virtual machines on book3s_64 host processors. 77 78 This module provides access to the hardware capabilities through 79 a character device node named /dev/kvm. 80 81 If unsure, say N. 82 83config KVM_BOOK3S_64_HV 84 tristate "KVM for POWER7 and later using hypervisor mode in host" 85 depends on KVM_BOOK3S_64 && PPC_POWERNV 86 select KVM_BOOK3S_HV_POSSIBLE 87 select MMU_NOTIFIER 88 select CMA 89 help 90 Support running unmodified book3s_64 guest kernels in 91 virtual machines on POWER7 and newer processors that have 92 hypervisor mode available to the host. 93 94 If you say Y here, KVM will use the hardware virtualization 95 facilities of POWER7 (and later) processors, meaning that 96 guest operating systems will run at full hardware speed 97 using supervisor and user modes. However, this also means 98 that KVM is not usable under PowerVM (pHyp), is only usable 99 on POWER7 or later processors, and cannot emulate a 100 different processor from the host processor. 101 102 If unsure, say N. 103 104config KVM_BOOK3S_64_PR 105 tristate "KVM support without using hypervisor mode in host" 106 depends on KVM_BOOK3S_64 107 select KVM_BOOK3S_PR_POSSIBLE 108 help 109 Support running guest kernels in virtual machines on processors 110 without using hypervisor mode in the host, by running the 111 guest in user mode (problem state) and emulating all 112 privileged instructions and registers. 113 114 This is not as fast as using hypervisor mode, but works on 115 machines where hypervisor mode is not available or not usable, 116 and can emulate processors that are different from the host 117 processor, including emulating 32-bit processors on a 64-bit 118 host. 119 120config KVM_BOOK3S_HV_EXIT_TIMING 121 bool "Detailed timing for hypervisor real-mode code" 122 depends on KVM_BOOK3S_HV_POSSIBLE && DEBUG_FS 123 help 124 Calculate time taken for each vcpu in the real-mode guest entry, 125 exit, and interrupt handling code, plus time spent in the guest 126 and in nap mode due to idle (cede) while other threads are still 127 in the guest. The total, minimum and maximum times in nanoseconds 128 together with the number of executions are reported in debugfs in 129 kvm/vm#/vcpu#/timings. The overhead is of the order of 30 - 40 130 ns per exit on POWER8. 131 132 If unsure, say N. 133 134config KVM_BOOKE_HV 135 bool 136 137config KVM_EXIT_TIMING 138 bool "Detailed exit timing" 139 depends on KVM_E500V2 || KVM_E500MC 140 help 141 Calculate elapsed time for every exit/enter cycle. A per-vcpu 142 report is available in debugfs kvm/vm#_vcpu#_timing. 143 The overhead is relatively small, however it is not recommended for 144 production environments. 145 146 If unsure, say N. 147 148config KVM_E500V2 149 bool "KVM support for PowerPC E500v2 processors" 150 depends on E500 && !PPC_E500MC 151 select KVM 152 select KVM_MMIO 153 select MMU_NOTIFIER 154 help 155 Support running unmodified E500 guest kernels in virtual machines on 156 E500v2 host processors. 157 158 This module provides access to the hardware capabilities through 159 a character device node named /dev/kvm. 160 161 If unsure, say N. 162 163config KVM_E500MC 164 bool "KVM support for PowerPC E500MC/E5500/E6500 processors" 165 depends on PPC_E500MC 166 select KVM 167 select KVM_MMIO 168 select KVM_BOOKE_HV 169 select MMU_NOTIFIER 170 help 171 Support running unmodified E500MC/E5500/E6500 guest kernels in 172 virtual machines on E500MC/E5500/E6500 host processors. 173 174 This module provides access to the hardware capabilities through 175 a character device node named /dev/kvm. 176 177 If unsure, say N. 178 179config KVM_MPIC 180 bool "KVM in-kernel MPIC emulation" 181 depends on KVM && E500 182 select HAVE_KVM_IRQCHIP 183 select HAVE_KVM_IRQFD 184 select HAVE_KVM_IRQ_ROUTING 185 select HAVE_KVM_MSI 186 help 187 Enable support for emulating MPIC devices inside the 188 host kernel, rather than relying on userspace to emulate. 189 Currently, support is limited to certain versions of 190 Freescale's MPIC implementation. 191 192config KVM_XICS 193 bool "KVM in-kernel XICS emulation" 194 depends on KVM_BOOK3S_64 && !KVM_MPIC 195 select HAVE_KVM_IRQCHIP 196 select HAVE_KVM_IRQFD 197 default y 198 help 199 Include support for the XICS (eXternal Interrupt Controller 200 Specification) interrupt controller architecture used on 201 IBM POWER (pSeries) servers. 202 203config KVM_XIVE 204 bool 205 default y 206 depends on KVM_XICS && PPC_XIVE_NATIVE && KVM_BOOK3S_HV_POSSIBLE 207 208endif # VIRTUALIZATION 209