5 source "virt/kvm/Kconfig"
7 menuconfig VIRTUALIZATION
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.
14 If you say N, all options in this submenu will be skipped and
21 select PREEMPT_NOTIFIERS
23 select HAVE_KVM_EVENTFD
26 select IRQ_BYPASS_MANAGER
27 select HAVE_KVM_IRQ_BYPASS
29 config KVM_BOOK3S_HANDLER
32 config KVM_BOOK3S_32_HANDLER
34 select KVM_BOOK3S_HANDLER
37 config KVM_BOOK3S_64_HANDLER
39 select KVM_BOOK3S_HANDLER
41 config KVM_BOOK3S_PR_POSSIBLE
46 config KVM_BOOK3S_HV_POSSIBLE
50 tristate "KVM support for PowerPC book3s_32 processors"
51 depends on PPC_BOOK3S_32 && !SMP && !PTE_64BIT
53 select KVM_BOOK3S_32_HANDLER
54 select KVM_BOOK3S_PR_POSSIBLE
56 Support running unmodified book3s_32 guest kernels
57 in virtual machines on book3s_32 host processors.
59 This module provides access to the hardware capabilities through
60 a character device node named /dev/kvm.
65 tristate "KVM support for PowerPC book3s_64 processors"
66 depends on PPC_BOOK3S_64
67 select KVM_BOOK3S_64_HANDLER
69 select KVM_BOOK3S_PR_POSSIBLE if !KVM_BOOK3S_HV_POSSIBLE
71 Support running unmodified book3s_64 and book3s_32 guest kernels
72 in virtual machines on book3s_64 host processors.
74 This module provides access to the hardware capabilities through
75 a character device node named /dev/kvm.
79 config KVM_BOOK3S_64_HV
80 tristate "KVM for POWER7 and later using hypervisor mode in host"
81 depends on KVM_BOOK3S_64 && PPC_POWERNV
82 select KVM_BOOK3S_HV_POSSIBLE
86 Support running unmodified book3s_64 guest kernels in
87 virtual machines on POWER7 and newer processors that have
88 hypervisor mode available to the host.
90 If you say Y here, KVM will use the hardware virtualization
91 facilities of POWER7 (and later) processors, meaning that
92 guest operating systems will run at full hardware speed
93 using supervisor and user modes. However, this also means
94 that KVM is not usable under PowerVM (pHyp), is only usable
95 on POWER7 or later processors, and cannot emulate a
96 different processor from the host processor.
100 config KVM_BOOK3S_64_PR
101 tristate "KVM support without using hypervisor mode in host"
102 depends on KVM_BOOK3S_64
103 select KVM_BOOK3S_PR_POSSIBLE
105 Support running guest kernels in virtual machines on processors
106 without using hypervisor mode in the host, by running the
107 guest in user mode (problem state) and emulating all
108 privileged instructions and registers.
110 This is not as fast as using hypervisor mode, but works on
111 machines where hypervisor mode is not available or not usable,
112 and can emulate processors that are different from the host
113 processor, including emulating 32-bit processors on a 64-bit
116 config KVM_BOOK3S_HV_EXIT_TIMING
117 bool "Detailed timing for hypervisor real-mode code"
118 depends on KVM_BOOK3S_HV_POSSIBLE && DEBUG_FS
120 Calculate time taken for each vcpu in the real-mode guest entry,
121 exit, and interrupt handling code, plus time spent in the guest
122 and in nap mode due to idle (cede) while other threads are still
123 in the guest. The total, minimum and maximum times in nanoseconds
124 together with the number of executions are reported in debugfs in
125 kvm/vm#/vcpu#/timings. The overhead is of the order of 30 - 40
126 ns per exit on POWER8.
133 config KVM_EXIT_TIMING
134 bool "Detailed exit timing"
135 depends on KVM_E500V2 || KVM_E500MC
137 Calculate elapsed time for every exit/enter cycle. A per-vcpu
138 report is available in debugfs kvm/vm#_vcpu#_timing.
139 The overhead is relatively small, however it is not recommended for
140 production environments.
145 bool "KVM support for PowerPC E500v2 processors"
146 depends on E500 && !PPC_E500MC
151 Support running unmodified E500 guest kernels in virtual machines on
152 E500v2 host processors.
154 This module provides access to the hardware capabilities through
155 a character device node named /dev/kvm.
160 bool "KVM support for PowerPC E500MC/E5500/E6500 processors"
161 depends on PPC_E500MC
167 Support running unmodified E500MC/E5500/E6500 guest kernels in
168 virtual machines on E500MC/E5500/E6500 host processors.
170 This module provides access to the hardware capabilities through
171 a character device node named /dev/kvm.
176 bool "KVM in-kernel MPIC emulation"
177 depends on KVM && E500
178 select HAVE_KVM_IRQCHIP
179 select HAVE_KVM_IRQFD
180 select HAVE_KVM_IRQ_ROUTING
183 Enable support for emulating MPIC devices inside the
184 host kernel, rather than relying on userspace to emulate.
185 Currently, support is limited to certain versions of
186 Freescale's MPIC implementation.
189 bool "KVM in-kernel XICS emulation"
190 depends on KVM_BOOK3S_64 && !KVM_MPIC
191 select HAVE_KVM_IRQCHIP
192 select HAVE_KVM_IRQFD
195 Include support for the XICS (eXternal Interrupt Controller
196 Specification) interrupt controller architecture used on
197 IBM POWER (pSeries) servers.
199 source drivers/vhost/Kconfig
201 endif # VIRTUALIZATION