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