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Linux/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 support for POWER7 and PPC970 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 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 
 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

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