arch/powerpc/kvm/Kconfig

   1 #
   2 # KVM configuration
   3 #
   4
   5 source "virt/kvm/Kconfig"
   6
   7 menuconfig 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
  17 if VIRTUALIZATION
  18
  19 config KVM
  20         bool
  21         select PREEMPT_NOTIFIERS
  22         select ANON_INODES
  23         select HAVE_KVM_EVENTFD
  24         select SRCU
  25
  26 config KVM_BOOK3S_HANDLER
  27         bool
  28
  29 config KVM_BOOK3S_32_HANDLER
  30         bool
  31         select KVM_BOOK3S_HANDLER
  32         select KVM_MMIO
  33
  34 config KVM_BOOK3S_64_HANDLER
  35         bool
  36         select KVM_BOOK3S_HANDLER
  37
  38 config KVM_BOOK3S_PR_POSSIBLE
  39         bool
  40         select KVM_MMIO
  41         select MMU_NOTIFIER
  42
  43 config KVM_BOOK3S_HV_POSSIBLE
  44         bool
  45
  46 config 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
  61 config 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
  76 config KVM_BOOK3S_64_HV
  77         tristate "KVM for POWER7 and later using hypervisor mode in host"
  78         depends on KVM_BOOK3S_64 && PPC_POWERNV
  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 newer 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 cannot emulate a
  93           different processor from the host processor.
  94
  95           If unsure, say N.
  96
  97 config 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
 113 config KVM_BOOK3S_HV_EXIT_TIMING
 114         bool "Detailed timing for hypervisor real-mode code"
 115         depends on KVM_BOOK3S_HV_POSSIBLE && DEBUG_FS
 116         ---help---
 117           Calculate time taken for each vcpu in the real-mode guest entry,
 118           exit, and interrupt handling code, plus time spent in the guest
 119           and in nap mode due to idle (cede) while other threads are still
 120           in the guest.  The total, minimum and maximum times in nanoseconds
 121           together with the number of executions are reported in debugfs in
 122           kvm/vm#/vcpu#/timings.  The overhead is of the order of 30 - 40
 123           ns per exit on POWER8.
 124
 125           If unsure, say N.
 126
 127 config KVM_BOOKE_HV
 128         bool
 129
 130 config KVM_EXIT_TIMING
 131         bool "Detailed exit timing"
 132         depends on 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
 141 config 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
 156 config 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
 172 config KVM_MPIC
 173         bool "KVM in-kernel MPIC emulation"
 174         depends on KVM && E500
 175         select HAVE_KVM_IRQCHIP
 176         select HAVE_KVM_IRQFD
 177         select HAVE_KVM_IRQ_ROUTING
 178         select HAVE_KVM_MSI
 179         help
 180           Enable support for emulating MPIC devices inside the
 181           host kernel, rather than relying on userspace to emulate.
 182           Currently, support is limited to certain versions of
 183           Freescale's MPIC implementation.
 184
 185 config KVM_XICS
 186         bool "KVM in-kernel XICS emulation"
 187         depends on KVM_BOOK3S_64 && !KVM_MPIC
 188         select HAVE_KVM_IRQCHIP
 189         select HAVE_KVM_IRQFD
 190         default y
 191         ---help---
 192           Include support for the XICS (eXternal Interrupt Controller
 193           Specification) interrupt controller architecture used on
 194           IBM POWER (pSeries) servers.
 195
 196 source drivers/vhost/Kconfig
 197
 198 endif # VIRTUALIZATION