83fe27ea53
SRCU is not necessary to be compiled by default in all cases. For tinification efforts not compiling SRCU unless necessary is desirable. The current patch tries to make compiling SRCU optional by introducing a new Kconfig option CONFIG_SRCU which is selected when any of the components making use of SRCU are selected. If we do not select CONFIG_SRCU, srcu.o will not be compiled at all. text data bss dec hex filename 2007 0 0 2007 7d7 kernel/rcu/srcu.o Size of arch/powerpc/boot/zImage changes from text data bss dec hex filename 831552 64180 23944 919676 e087c arch/powerpc/boot/zImage : before 829504 64180 23952 917636 e0084 arch/powerpc/boot/zImage : after so the savings are about ~2000 bytes. Signed-off-by: Pranith Kumar <bobby.prani@gmail.com> CC: Paul E. McKenney <paulmck@linux.vnet.ibm.com> CC: Josh Triplett <josh@joshtriplett.org> CC: Lai Jiangshan <laijs@cn.fujitsu.com> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> [ paulmck: resolve conflict due to removal of arch/ia64/kvm/Kconfig. ]
73 lines
1.8 KiB
Plaintext
73 lines
1.8 KiB
Plaintext
#
|
|
# KVM configuration
|
|
#
|
|
|
|
source "virt/kvm/Kconfig"
|
|
|
|
menuconfig VIRTUALIZATION
|
|
bool "Virtualization"
|
|
---help---
|
|
Say Y here to get to see options for using your Linux host to run
|
|
other operating systems inside virtual machines (guests).
|
|
This option alone does not add any kernel code.
|
|
|
|
If you say N, all options in this submenu will be skipped and
|
|
disabled.
|
|
|
|
if VIRTUALIZATION
|
|
|
|
config KVM
|
|
bool "Kernel-based Virtual Machine (KVM) support"
|
|
select PREEMPT_NOTIFIERS
|
|
select ANON_INODES
|
|
select HAVE_KVM_CPU_RELAX_INTERCEPT
|
|
select KVM_MMIO
|
|
select KVM_ARM_HOST
|
|
select SRCU
|
|
depends on ARM_VIRT_EXT && ARM_LPAE
|
|
---help---
|
|
Support hosting virtualized guest machines. You will also
|
|
need to select one or more of the processor modules below.
|
|
|
|
This module provides access to the hardware capabilities through
|
|
a character device node named /dev/kvm.
|
|
|
|
If unsure, say N.
|
|
|
|
config KVM_ARM_HOST
|
|
bool "KVM host support for ARM cpus."
|
|
depends on KVM
|
|
depends on MMU
|
|
select MMU_NOTIFIER
|
|
---help---
|
|
Provides host support for ARM processors.
|
|
|
|
config KVM_ARM_MAX_VCPUS
|
|
int "Number maximum supported virtual CPUs per VM"
|
|
depends on KVM_ARM_HOST
|
|
default 4
|
|
help
|
|
Static number of max supported virtual CPUs per VM.
|
|
|
|
If you choose a high number, the vcpu structures will be quite
|
|
large, so only choose a reasonable number that you expect to
|
|
actually use.
|
|
|
|
config KVM_ARM_VGIC
|
|
bool "KVM support for Virtual GIC"
|
|
depends on KVM_ARM_HOST && OF
|
|
select HAVE_KVM_IRQCHIP
|
|
default y
|
|
---help---
|
|
Adds support for a hardware assisted, in-kernel GIC emulation.
|
|
|
|
config KVM_ARM_TIMER
|
|
bool "KVM support for Architected Timers"
|
|
depends on KVM_ARM_VGIC && ARM_ARCH_TIMER
|
|
select HAVE_KVM_IRQCHIP
|
|
default y
|
|
---help---
|
|
Adds support for the Architected Timers in virtual machines
|
|
|
|
endif # VIRTUALIZATION
|