1 # SPDX-License-Identifier: GPL-2.0
6 source "virt/kvm/Kconfig"
8 menuconfig VIRTUALIZATION
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.
15 If you say N, all options in this submenu will be skipped and
22 select PREEMPT_NOTIFIERS
24 select HAVE_KVM_EVENTFD
27 select IRQ_BYPASS_MANAGER
28 select HAVE_KVM_IRQ_BYPASS
30 config KVM_BOOK3S_HANDLER
33 config KVM_BOOK3S_32_HANDLER
35 select KVM_BOOK3S_HANDLER
38 config KVM_BOOK3S_64_HANDLER
40 select KVM_BOOK3S_HANDLER
42 config KVM_BOOK3S_PR_POSSIBLE
47 config KVM_BOOK3S_HV_POSSIBLE
51 tristate "KVM support for PowerPC book3s_32 processors"
52 depends on PPC_BOOK3S_32 && !SMP && !PTE_64BIT
54 select KVM_BOOK3S_32_HANDLER
55 select KVM_BOOK3S_PR_POSSIBLE
57 Support running unmodified book3s_32 guest kernels
58 in virtual machines on book3s_32 host processors.
60 This module provides access to the hardware capabilities through
61 a character device node named /dev/kvm.
66 tristate "KVM support for PowerPC book3s_64 processors"
67 depends on PPC_BOOK3S_64
68 select KVM_BOOK3S_64_HANDLER
70 select KVM_BOOK3S_PR_POSSIBLE if !KVM_BOOK3S_HV_POSSIBLE
71 select SPAPR_TCE_IOMMU if IOMMU_SUPPORT && (PPC_PSERIES || PPC_POWERNV)
73 Support running unmodified book3s_64 and book3s_32 guest kernels
74 in virtual machines on book3s_64 host processors.
76 This module provides access to the hardware capabilities through
77 a character device node named /dev/kvm.
81 config KVM_BOOK3S_64_HV
82 tristate "KVM for POWER7 and later using hypervisor mode in host"
83 depends on KVM_BOOK3S_64 && PPC_POWERNV
84 select KVM_BOOK3S_HV_POSSIBLE
88 Support running unmodified book3s_64 guest kernels in
89 virtual machines on POWER7 and newer processors that have
90 hypervisor mode available to the host.
92 If you say Y here, KVM will use the hardware virtualization
93 facilities of POWER7 (and later) processors, meaning that
94 guest operating systems will run at full hardware speed
95 using supervisor and user modes. However, this also means
96 that KVM is not usable under PowerVM (pHyp), is only usable
97 on POWER7 or later processors, and cannot emulate a
98 different processor from the host processor.
102 config KVM_BOOK3S_64_PR
103 tristate "KVM support without using hypervisor mode in host"
104 depends on KVM_BOOK3S_64
105 select KVM_BOOK3S_PR_POSSIBLE
107 Support running guest kernels in virtual machines on processors
108 without using hypervisor mode in the host, by running the
109 guest in user mode (problem state) and emulating all
110 privileged instructions and registers.
112 This is not as fast as using hypervisor mode, but works on
113 machines where hypervisor mode is not available or not usable,
114 and can emulate processors that are different from the host
115 processor, including emulating 32-bit processors on a 64-bit
118 config KVM_BOOK3S_HV_EXIT_TIMING
119 bool "Detailed timing for hypervisor real-mode code"
120 depends on KVM_BOOK3S_HV_POSSIBLE && DEBUG_FS
122 Calculate time taken for each vcpu in the real-mode guest entry,
123 exit, and interrupt handling code, plus time spent in the guest
124 and in nap mode due to idle (cede) while other threads are still
125 in the guest. The total, minimum and maximum times in nanoseconds
126 together with the number of executions are reported in debugfs in
127 kvm/vm#/vcpu#/timings. The overhead is of the order of 30 - 40
128 ns per exit on POWER8.
135 config KVM_EXIT_TIMING
136 bool "Detailed exit timing"
137 depends on KVM_E500V2 || KVM_E500MC
139 Calculate elapsed time for every exit/enter cycle. A per-vcpu
140 report is available in debugfs kvm/vm#_vcpu#_timing.
141 The overhead is relatively small, however it is not recommended for
142 production environments.
147 bool "KVM support for PowerPC E500v2 processors"
148 depends on E500 && !PPC_E500MC
153 Support running unmodified E500 guest kernels in virtual machines on
154 E500v2 host processors.
156 This module provides access to the hardware capabilities through
157 a character device node named /dev/kvm.
162 bool "KVM support for PowerPC E500MC/E5500/E6500 processors"
163 depends on PPC_E500MC
169 Support running unmodified E500MC/E5500/E6500 guest kernels in
170 virtual machines on E500MC/E5500/E6500 host processors.
172 This module provides access to the hardware capabilities through
173 a character device node named /dev/kvm.
178 bool "KVM in-kernel MPIC emulation"
179 depends on KVM && E500
180 select HAVE_KVM_IRQCHIP
181 select HAVE_KVM_IRQFD
182 select HAVE_KVM_IRQ_ROUTING
185 Enable support for emulating MPIC devices inside the
186 host kernel, rather than relying on userspace to emulate.
187 Currently, support is limited to certain versions of
188 Freescale's MPIC implementation.
191 bool "KVM in-kernel XICS emulation"
192 depends on KVM_BOOK3S_64 && !KVM_MPIC
193 select HAVE_KVM_IRQCHIP
194 select HAVE_KVM_IRQFD
197 Include support for the XICS (eXternal Interrupt Controller
198 Specification) interrupt controller architecture used on
199 IBM POWER (pSeries) servers.
204 depends on KVM_XICS && PPC_XIVE_NATIVE && KVM_BOOK3S_HV_POSSIBLE
206 source drivers/vhost/Kconfig
208 endif # VIRTUALIZATION