Commit d01b9a9f authored by Saurabh Sengar's avatar Saurabh Sengar Committed by Wei Liu
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Drivers: hv: Kconfig: Add HYPERV_VTL_MODE 



Add HYPERV_VTL_MODE Kconfig flag for VTL mode.

Signed-off-by: default avatarSaurabh Sengar <ssengar@linux.microsoft.com>
Reviewed-by: default avatarMichael Kelley <mikelley@microsoft.com>
Link: https://lore.kernel.org/r/1681192532-15460-5-git-send-email-ssengar@linux.microsoft.com


Signed-off-by: default avatarWei Liu <wei.liu@kernel.org>
parent 0a7a0058

drivers/hv/Kconfig

+24 −0
Original line number Diff line number Diff line
@@ -13,6 +13,30 @@ config HYPERV 
	  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