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. ]
104 lines
2.8 KiB
Plaintext
104 lines
2.8 KiB
Plaintext
#
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# KVM configuration
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#
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source "virt/kvm/Kconfig"
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menuconfig VIRTUALIZATION
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bool "Virtualization"
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depends on HAVE_KVM || X86
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default y
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---help---
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Say Y here to get to see options for using your Linux host to run other
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operating systems inside virtual machines (guests).
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This option alone does not add any kernel code.
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If you say N, all options in this submenu will be skipped and disabled.
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if VIRTUALIZATION
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config KVM
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tristate "Kernel-based Virtual Machine (KVM) support"
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depends on HAVE_KVM
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depends on HIGH_RES_TIMERS
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# for TASKSTATS/TASK_DELAY_ACCT:
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depends on NET
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select PREEMPT_NOTIFIERS
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select MMU_NOTIFIER
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select ANON_INODES
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select HAVE_KVM_IRQCHIP
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select HAVE_KVM_IRQFD
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select HAVE_KVM_IRQ_ROUTING
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select HAVE_KVM_EVENTFD
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select KVM_APIC_ARCHITECTURE
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select KVM_ASYNC_PF
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select USER_RETURN_NOTIFIER
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select KVM_MMIO
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select TASKSTATS
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select TASK_DELAY_ACCT
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select PERF_EVENTS
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select HAVE_KVM_MSI
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select HAVE_KVM_CPU_RELAX_INTERCEPT
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select KVM_VFIO
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select SRCU
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---help---
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Support hosting fully virtualized guest machines using hardware
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virtualization extensions. You will need a fairly recent
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processor equipped with virtualization extensions. You will also
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need to select one or more of the processor modules below.
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This module provides access to the hardware capabilities through
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a character device node named /dev/kvm.
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To compile this as a module, choose M here: the module
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will be called kvm.
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If unsure, say N.
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config KVM_INTEL
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tristate "KVM for Intel processors support"
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depends on KVM
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# for perf_guest_get_msrs():
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depends on CPU_SUP_INTEL
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---help---
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Provides support for KVM on Intel processors equipped with the VT
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extensions.
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To compile this as a module, choose M here: the module
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will be called kvm-intel.
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config KVM_AMD
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tristate "KVM for AMD processors support"
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depends on KVM
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---help---
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Provides support for KVM on AMD processors equipped with the AMD-V
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(SVM) extensions.
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To compile this as a module, choose M here: the module
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will be called kvm-amd.
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config KVM_MMU_AUDIT
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bool "Audit KVM MMU"
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depends on KVM && TRACEPOINTS
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---help---
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This option adds a R/W kVM module parameter 'mmu_audit', which allows
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auditing of KVM MMU events at runtime.
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config KVM_DEVICE_ASSIGNMENT
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bool "KVM legacy PCI device assignment support"
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depends on KVM && PCI && IOMMU_API
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default y
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---help---
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Provide support for legacy PCI device assignment through KVM. The
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kernel now also supports a full featured userspace device driver
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framework through VFIO, which supersedes much of this support.
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If unsure, say Y.
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# OK, it's a little counter-intuitive to do this, but it puts it neatly under
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# the virtualization menu.
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source drivers/vhost/Kconfig
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source drivers/lguest/Kconfig
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endif # VIRTUALIZATION
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