Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
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 SYSFB if EFI && !HYPERV_VTL_MODE
13 select IRQ_MSI_LIB if X86
14 help
15 Select this option to run Linux as a Hyper-V client operating
16 system.
17
18config HYPERV_VTL_MODE
19 bool "Enable Linux to boot in VTL context"
20 depends on (X86_64 && HAVE_STATIC_CALL) || ARM64
21 depends on HYPERV
22 depends on SMP
23 default n
24 help
25 Virtual Secure Mode (VSM) is a set of hypervisor capabilities and
26 enlightenments offered to host and guest partitions which enables
27 the creation and management of new security boundaries within
28 operating system software.
29
30 VSM achieves and maintains isolation through Virtual Trust Levels
31 (VTLs). Virtual Trust Levels are hierarchical, with higher levels
32 being more privileged than lower levels. VTL0 is the least privileged
33 level, and currently only other level supported is VTL2.
34
35 Select this option to build a Linux kernel to run at a VTL other than
36 the normal VTL0, which currently is only VTL2. This option
37 initializes the kernel to run in VTL2, and adds the ability to boot
38 secondary CPUs directly into 64-bit context as required for VTLs other
39 than 0. A kernel built with this option must run at VTL2, and will
40 not run as a normal guest.
41
42 If unsure, say N
43
44config HYPERV_TIMER
45 def_bool HYPERV && X86
46
47config HYPERV_UTILS
48 tristate "Microsoft Hyper-V Utilities driver"
49 depends on HYPERV_VMBUS && CONNECTOR && NLS
50 depends on PTP_1588_CLOCK_OPTIONAL
51 help
52 Select this option to enable the Hyper-V Utilities.
53
54config HYPERV_BALLOON
55 tristate "Microsoft Hyper-V Balloon driver"
56 depends on HYPERV_VMBUS
57 select PAGE_REPORTING
58 help
59 Select this option to enable Hyper-V Balloon driver.
60
61config HYPERV_VMBUS
62 tristate "Microsoft Hyper-V VMBus driver"
63 depends on HYPERV
64 default HYPERV
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