diff options
| author | Naman Jain <namjain@linux.microsoft.com> | 2025-11-13 04:41:49 +0000 |
|---|---|---|
| committer | Wei Liu <wei.liu@kernel.org> | 2025-12-05 23:16:26 +0000 |
| commit | 7bfe3b8ea6e30437e01fcb8e4f56ef6e4d986d0f (patch) | |
| tree | 4235d0996adfaedaa2d615822cbb2d6e5b0d5b01 /drivers/hv/Kconfig | |
| parent | cffe9f58de1eb1a2cefce10c9512162fca3f7c89 (diff) | |
Drivers: hv: Introduce mshv_vtl driver
Provide an interface for Virtual Machine Monitor like OpenVMM and its
use as OpenHCL paravisor to control VTL0 (Virtual trust Level).
Expose devices and support IOCTLs for features like VTL creation,
VTL0 memory management, context switch, making hypercalls,
mapping VTL0 address space to VTL2 userspace, getting new VMBus
messages and channel events in VTL2 etc.
Co-developed-by: Roman Kisel <romank@linux.microsoft.com>
Signed-off-by: Roman Kisel <romank@linux.microsoft.com>
Co-developed-by: Saurabh Sengar <ssengar@linux.microsoft.com>
Signed-off-by: Saurabh Sengar <ssengar@linux.microsoft.com>
Reviewed-by: Michael Kelley <mhklinux@outlook.com>
Signed-off-by: Naman Jain <namjain@linux.microsoft.com>
Signed-off-by: Wei Liu <wei.liu@kernel.org>
Diffstat (limited to 'drivers/hv/Kconfig')
| -rw-r--r-- | drivers/hv/Kconfig | 27 |
1 files changed, 26 insertions, 1 deletions
diff --git a/drivers/hv/Kconfig b/drivers/hv/Kconfig index 0b8c391a0342..d4a8d349200c 100644 --- a/drivers/hv/Kconfig +++ b/drivers/hv/Kconfig @@ -17,7 +17,8 @@ config HYPERV config HYPERV_VTL_MODE bool "Enable Linux to boot in VTL context" - depends on (X86_64 || ARM64) && HYPERV + depends on (X86_64 && HAVE_STATIC_CALL) || ARM64 + depends on HYPERV depends on SMP default n help @@ -82,4 +83,28 @@ config MSHV_ROOT If unsure, say N. +config MSHV_VTL + tristate "Microsoft Hyper-V VTL driver" + depends on X86_64 && HYPERV_VTL_MODE + depends on HYPERV_VMBUS + # Mapping VTL0 memory to a userspace process in VTL2 is supported in OpenHCL. + # VTL2 for OpenHCL makes use of Huge Pages to improve performance on VMs, + # specially with large memory requirements. + depends on TRANSPARENT_HUGEPAGE + # MTRRs are controlled by VTL0, and are not specific to individual VTLs. + # Therefore, do not attempt to access or modify MTRRs here. + depends on !MTRR + select CPUMASK_OFFSTACK + select VIRT_XFER_TO_GUEST_WORK + default n + help + Select this option to enable Hyper-V VTL driver support. + This driver provides interfaces for Virtual Machine Manager (VMM) running in VTL2 + userspace to create VTLs and partitions, setup and manage VTL0 memory and + allow userspace to make direct hypercalls. This also allows to map VTL0's address + space to a usermode process in VTL2 and supports getting new VMBus messages and channel + events in VTL2. + + If unsure, say N. + endmenu |