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# SPDX-License-Identifier: GPL-2.0-only
#
# Virtualization support drivers
#
menuconfig VIRT_DRIVERS
bool "Virtualization drivers"
help
Say Y here to get to see options for device drivers that support
virtualization environments.
If you say N, all options in this submenu will be skipped and disabled.
if VIRT_DRIVERS
config VMGENID
tristate "Virtual Machine Generation ID driver"
default y
help
Say Y here to use the hypervisor-provided Virtual Machine Generation ID
to reseed the RNG when the VM is cloned. This is highly recommended if
you intend to do any rollback / cloning / snapshotting of VMs.
Prefer Y to M so that this protection is activated very early.
config FSL_HV_MANAGER
tristate "Freescale hypervisor management driver"
depends on FSL_SOC
select EPAPR_PARAVIRT
help
The Freescale hypervisor management driver provides several services
to drivers and applications related to the Freescale hypervisor:
1) An ioctl interface for querying and managing partitions.
2) A file interface to reading incoming doorbells.
3) An interrupt handler for shutting down the partition upon
receiving the shutdown doorbell from a manager partition.
4) A kernel interface for receiving callbacks when a managed
partition shuts down.
config STEAL_GOVERNOR
tristate "Dynamic vCPU management based on steal time"
depends on PARAVIRT && SMP
select PREFERRED_CPU
default m
help
This driver helps to reduce the steal time in paravirtualized
environments, thereby reducing vCPU preemption costs.
By default preferred CPUs will be same as active CPUs. Depending
on the steal time when steal_governor driver is enabled,
preferred CPUs could become subset of active CPUs.
More details are at: Documentation/driver-api/steal-governor.rst
It is recommended to build it as module and load the module
to enable it.
source "drivers/virt/vboxguest/Kconfig"
source "drivers/virt/nitro_enclaves/Kconfig"
source "drivers/virt/acrn/Kconfig"
endif
source "drivers/virt/coco/Kconfig"
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