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1# SPDX-License-Identifier: GPL-2.0
2#
3# KVM configuration
4#
5source "virt/kvm/Kconfig"
6
7menuconfig 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 disabled.
15
16if VIRTUALIZATION
17
18config KVM
19 tristate "Kernel-based Virtual Machine (KVM) support"
20 depends on HAVE_KVM
21 depends on MIPS_FP_SUPPORT
22 select EXPORT_UASM
23 select PREEMPT_NOTIFIERS
24 select KVM_GENERIC_DIRTYLOG_READ_PROTECT
25 select HAVE_KVM_EVENTFD
26 select HAVE_KVM_VCPU_ASYNC_IOCTL
27 select KVM_MMIO
28 select MMU_NOTIFIER
29 select SRCU
30 help
31 Support for hosting Guest kernels.
32
33choice
34 prompt "Virtualization mode"
35 depends on KVM
36 default KVM_MIPS_TE
37
38config KVM_MIPS_TE
39 bool "Trap & Emulate"
40 depends on CPU_MIPS32_R2
41 help
42 Use trap and emulate to virtualize 32-bit guests in user mode. This
43 does not require any special hardware Virtualization support beyond
44 standard MIPS32 r2 or later, but it does require the guest kernel
45 to be configured with CONFIG_KVM_GUEST=y so that it resides in the
46 user address segment.
47
48config KVM_MIPS_VZ
49 bool "MIPS Virtualization (VZ) ASE"
50 help
51 Use the MIPS Virtualization (VZ) ASE to virtualize guests. This
52 supports running unmodified guest kernels (with CONFIG_KVM_GUEST=n),
53 but requires hardware support.
54
55endchoice
56
57config KVM_MIPS_DYN_TRANS
58 bool "KVM/MIPS: Dynamic binary translation to reduce traps"
59 depends on KVM_MIPS_TE
60 default y
61 help
62 When running in Trap & Emulate mode patch privileged
63 instructions to reduce the number of traps.
64
65 If unsure, say Y.
66
67config KVM_MIPS_DEBUG_COP0_COUNTERS
68 bool "Maintain counters for COP0 accesses"
69 depends on KVM
70 help
71 Maintain statistics for Guest COP0 accesses.
72 A histogram of COP0 accesses is printed when the VM is
73 shutdown.
74
75 If unsure, say N.
76
77endif # VIRTUALIZATION