Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1# SPDX-License-Identifier: GPL-2.0
2
3menu "Microsoft Hyper-V guest support"
4
5config HYPERV
6 bool "Microsoft Hyper-V core hypervisor support"
7 depends on (X86 && X86_LOCAL_APIC && HYPERVISOR_GUEST) \
8 || (ARM64 && !CPU_BIG_ENDIAN)
9 select PARAVIRT
10 select X86_HV_CALLBACK_VECTOR if X86
11 select OF_EARLY_FLATTREE if OF
12 select IRQ_MSI_LIB if X86
13 help
14 Select this option to run Linux as a Hyper-V client operating
15 system.
16
17config HYPERV_VTL_MODE
18 bool "Enable Linux to boot in VTL context"
19 depends on (X86_64 && HAVE_STATIC_CALL) || ARM64
20 depends on HYPERV
21 depends on SMP
22 default n
23 help
24 Virtual Secure Mode (VSM) is a set of hypervisor capabilities and
25 enlightenments offered to host and guest partitions which enables
26 the creation and management of new security boundaries within
27 operating system software.
28
29 VSM achieves and maintains isolation through Virtual Trust Levels
30 (VTLs). Virtual Trust Levels are hierarchical, with higher levels
31 being more privileged than lower levels. VTL0 is the least privileged
32 level, and currently only other level supported is VTL2.
33
34 Select this option to build a Linux kernel to run at a VTL other than
35 the normal VTL0, which currently is only VTL2. This option
36 initializes the kernel to run in VTL2, and adds the ability to boot
37 secondary CPUs directly into 64-bit context as required for VTLs other
38 than 0. A kernel built with this option must run at VTL2, and will
39 not run as a normal guest.
40
41 If unsure, say N
42
43config HYPERV_TIMER
44 def_bool HYPERV && X86
45
46config HYPERV_UTILS
47 tristate "Microsoft Hyper-V Utilities driver"
48 depends on HYPERV_VMBUS && CONNECTOR && NLS
49 depends on PTP_1588_CLOCK_OPTIONAL
50 help
51 Select this option to enable the Hyper-V Utilities.
52
53config HYPERV_BALLOON
54 tristate "Microsoft Hyper-V Balloon driver"
55 depends on HYPERV_VMBUS
56 select PAGE_REPORTING
57 help
58 Select this option to enable Hyper-V Balloon driver.
59
60config HYPERV_VMBUS
61 tristate "Microsoft Hyper-V VMBus driver"
62 depends on HYPERV
63 default HYPERV
64 select SYSFB if EFI && !HYPERV_VTL_MODE
65 help
66 Select this option to enable Hyper-V Vmbus driver.
67
68config MSHV_ROOT
69 tristate "Microsoft Hyper-V root partition support"
70 depends on HYPERV && (X86_64 || ARM64)
71 depends on !HYPERV_VTL_MODE
72 # The hypervisor interface operates on 4k pages. Enforcing it here
73 # simplifies many assumptions in the root partition code.
74 # e.g. When withdrawing memory, the hypervisor gives back 4k pages in
75 # no particular order, making it impossible to reassemble larger pages
76 depends on PAGE_SIZE_4KB
77 select EVENTFD
78 select VIRT_XFER_TO_GUEST_WORK
79 select HMM_MIRROR
80 select MMU_NOTIFIER
81 default n
82 help
83 Select this option to enable support for booting and running as root
84 partition on Microsoft Hyper-V.
85
86 If unsure, say N.
87
88config MSHV_VTL
89 tristate "Microsoft Hyper-V VTL driver"
90 depends on X86_64 && HYPERV_VTL_MODE
91 depends on HYPERV_VMBUS
92 # Mapping VTL0 memory to a userspace process in VTL2 is supported in OpenHCL.
93 # VTL2 for OpenHCL makes use of Huge Pages to improve performance on VMs,
94 # specially with large memory requirements.
95 depends on TRANSPARENT_HUGEPAGE
96 # MTRRs are controlled by VTL0, and are not specific to individual VTLs.
97 # Therefore, do not attempt to access or modify MTRRs here.
98 depends on !MTRR
99 select CPUMASK_OFFSTACK
100 select VIRT_XFER_TO_GUEST_WORK
101 default n
102 help
103 Select this option to enable Hyper-V VTL driver support.
104 This driver provides interfaces for Virtual Machine Manager (VMM) running in VTL2
105 userspace to create VTLs and partitions, setup and manage VTL0 memory and
106 allow userspace to make direct hypercalls. This also allows to map VTL0's address
107 space to a usermode process in VTL2 and supports getting new VMBus messages and channel
108 events in VTL2.
109
110 If unsure, say N.
111
112endmenu