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
70 select SPAPR_TCE_IOMMU if IOMMU_SUPPORT
72 Support running unmodified book3s_64 and book3s_32 guest kernels
73 in virtual machines on book3s_64 host processors.
75 This module provides access to the hardware capabilities through
76 a character device node named /dev/kvm.
80 config KVM_BOOK3S_64_HV
81 tristate "KVM for POWER7 and later using hypervisor mode in host"
82 depends on KVM_BOOK3S_64 && PPC_POWERNV
83 select KVM_BOOK3S_HV_POSSIBLE
87 Support running unmodified book3s_64 guest kernels in
88 virtual machines on POWER7 and newer processors that have
89 hypervisor mode available to the host.
91 If you say Y here, KVM will use the hardware virtualization
92 facilities of POWER7 (and later) processors, meaning that
93 guest operating systems will run at full hardware speed
94 using supervisor and user modes. However, this also means
95 that KVM is not usable under PowerVM (pHyp), is only usable
96 on POWER7 or later processors, and cannot emulate a
97 different processor from the host processor.
101 config KVM_BOOK3S_64_PR
102 tristate "KVM support without using hypervisor mode in host"
103 depends on KVM_BOOK3S_64
104 select KVM_BOOK3S_PR_POSSIBLE
106 Support running guest kernels in virtual machines on processors
107 without using hypervisor mode in the host, by running the
108 guest in user mode (problem state) and emulating all
109 privileged instructions and registers.
111 This is not as fast as using hypervisor mode, but works on
112 machines where hypervisor mode is not available or not usable,
113 and can emulate processors that are different from the host
114 processor, including emulating 32-bit processors on a 64-bit
117 config KVM_BOOK3S_HV_EXIT_TIMING
118 bool "Detailed timing for hypervisor real-mode code"
119 depends on KVM_BOOK3S_HV_POSSIBLE && DEBUG_FS
121 Calculate time taken for each vcpu in the real-mode guest entry,
122 exit, and interrupt handling code, plus time spent in the guest
123 and in nap mode due to idle (cede) while other threads are still
124 in the guest. The total, minimum and maximum times in nanoseconds
125 together with the number of executions are reported in debugfs in
126 kvm/vm#/vcpu#/timings. The overhead is of the order of 30 - 40
127 ns per exit on POWER8.
134 config KVM_EXIT_TIMING
135 bool "Detailed exit timing"
136 depends on KVM_E500V2 || KVM_E500MC
138 Calculate elapsed time for every exit/enter cycle. A per-vcpu
139 report is available in debugfs kvm/vm#_vcpu#_timing.
140 The overhead is relatively small, however it is not recommended for
141 production environments.
146 bool "KVM support for PowerPC E500v2 processors"
147 depends on E500 && !PPC_E500MC
152 Support running unmodified E500 guest kernels in virtual machines on
153 E500v2 host processors.
155 This module provides access to the hardware capabilities through
156 a character device node named /dev/kvm.
161 bool "KVM support for PowerPC E500MC/E5500/E6500 processors"
162 depends on PPC_E500MC
168 Support running unmodified E500MC/E5500/E6500 guest kernels in
169 virtual machines on E500MC/E5500/E6500 host processors.
171 This module provides access to the hardware capabilities through
172 a character device node named /dev/kvm.
177 bool "KVM in-kernel MPIC emulation"
178 depends on KVM && E500
179 select HAVE_KVM_IRQCHIP
180 select HAVE_KVM_IRQFD
181 select HAVE_KVM_IRQ_ROUTING
184 Enable support for emulating MPIC devices inside the
185 host kernel, rather than relying on userspace to emulate.
186 Currently, support is limited to certain versions of
187 Freescale's MPIC implementation.
190 bool "KVM in-kernel XICS emulation"
191 depends on KVM_BOOK3S_64 && !KVM_MPIC
192 select HAVE_KVM_IRQCHIP
193 select HAVE_KVM_IRQFD
196 Include support for the XICS (eXternal Interrupt Controller
197 Specification) interrupt controller architecture used on
198 IBM POWER (pSeries) servers.
203 depends on KVM_XICS && PPC_XIVE_NATIVE && KVM_BOOK3S_HV_POSSIBLE
205 source drivers/vhost/Kconfig
207 endif # VIRTUALIZATION