1# SPDX-License-Identifier: GPL-2.0 2 3menu "Microsoft Hyper-V guest support" 4 5config HYPERV 6 tristate "Microsoft Hyper-V client drivers" 7 depends on (X86 && X86_LOCAL_APIC && HYPERVISOR_GUEST) \ 8 || (ACPI && ARM64 && !CPU_BIG_ENDIAN) 9 select PARAVIRT 10 select X86_HV_CALLBACK_VECTOR if X86 11 select OF_EARLY_FLATTREE if OF 12 help 13 Select this option to run Linux as a Hyper-V client operating 14 system. 15 16config HYPERV_VTL_MODE 17 bool "Enable Linux to boot in VTL context" 18 depends on X86_64 && HYPERV 19 default n 20 help 21 Virtual Secure Mode (VSM) is a set of hypervisor capabilities and 22 enlightenments offered to host and guest partitions which enables 23 the creation and management of new security boundaries within 24 operating system software. 25 26 VSM achieves and maintains isolation through Virtual Trust Levels 27 (VTLs). Virtual Trust Levels are hierarchical, with higher levels 28 being more privileged than lower levels. VTL0 is the least privileged 29 level, and currently only other level supported is VTL2. 30 31 Select this option to build a Linux kernel to run at a VTL other than 32 the normal VTL0, which currently is only VTL2. This option 33 initializes the x86 platform for VTL2, and adds the ability to boot 34 secondary CPUs directly into 64-bit context as required for VTLs other 35 than 0. A kernel built with this option must run at VTL2, and will 36 not run as a normal guest. 37 38 If unsure, say N 39 40config HYPERV_TIMER 41 def_bool HYPERV && X86 42 43config HYPERV_UTILS 44 tristate "Microsoft Hyper-V Utilities driver" 45 depends on HYPERV && CONNECTOR && NLS 46 depends on PTP_1588_CLOCK_OPTIONAL 47 help 48 Select this option to enable the Hyper-V Utilities. 49 50config HYPERV_BALLOON 51 tristate "Microsoft Hyper-V Balloon driver" 52 depends on HYPERV 53 select PAGE_REPORTING 54 help 55 Select this option to enable Hyper-V Balloon driver. 56 57endmenu 58