Merge tag 'mm-stable-2023-04-27-15-30' of git://git.kernel.org/pub/scm/linux/kernel...

[linux-2.6-microblaze.git] / drivers / hv / Kconfig

diff --git a/drivers/hv/Kconfig b/drivers/hv/Kconfig
index 0747a8f..0024210 100644 (file)
--- a/drivers/hv/Kconfig
+++ b/drivers/hv/Kconfig
@@ -4,15 +4,39 @@ menu "Microsoft Hyper-V guest support"
 
 config HYPERV
        tristate "Microsoft Hyper-V client drivers"
-       depends on ACPI && ((X86 && X86_LOCAL_APIC && HYPERVISOR_GUEST) \
-               || (ARM64 && !CPU_BIG_ENDIAN))
+       depends on (X86 && X86_LOCAL_APIC && HYPERVISOR_GUEST) \
+               || (ACPI && ARM64 && !CPU_BIG_ENDIAN)
        select PARAVIRT
        select X86_HV_CALLBACK_VECTOR if X86
-       select VMAP_PFN
+       select OF_EARLY_FLATTREE if OF
        help
          Select this option to run Linux as a Hyper-V client operating
          system.
 
+config HYPERV_VTL_MODE
+       bool "Enable Linux to boot in VTL context"
+       depends on X86_64 && HYPERV
+       default n
+       help
+         Virtual Secure Mode (VSM) is a set of hypervisor capabilities and
+         enlightenments offered to host and guest partitions which enables
+         the creation and management of new security boundaries within
+         operating system software.
+
+         VSM achieves and maintains isolation through Virtual Trust Levels
+         (VTLs). Virtual Trust Levels are hierarchical, with higher levels
+         being more privileged than lower levels. VTL0 is the least privileged
+         level, and currently only other level supported is VTL2.
+
+         Select this option to build a Linux kernel to run at a VTL other than
+         the normal VTL0, which currently is only VTL2.  This option
+         initializes the x86 platform for VTL2, and adds the ability to boot
+         secondary CPUs directly into 64-bit context as required for VTLs other
+         than 0.  A kernel built with this option must run at VTL2, and will
+         not run as a normal guest.
+
+         If unsure, say N
+
 config HYPERV_TIMER
        def_bool HYPERV && X86