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208 lines
5.8 KiB
208 lines
5.8 KiB
# SPDX-License-Identifier: GPL-2.0 |
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# |
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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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help |
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Say Y here to get to see options for using your Linux host to run |
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other 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 |
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disabled. |
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if VIRTUALIZATION |
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config KVM |
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bool |
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select PREEMPT_NOTIFIERS |
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select HAVE_KVM_EVENTFD |
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select HAVE_KVM_VCPU_ASYNC_IOCTL |
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select SRCU |
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select KVM_VFIO |
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select IRQ_BYPASS_MANAGER |
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select HAVE_KVM_IRQ_BYPASS |
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config KVM_BOOK3S_HANDLER |
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bool |
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config KVM_BOOK3S_32_HANDLER |
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bool |
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select KVM_BOOK3S_HANDLER |
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select KVM_MMIO |
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config KVM_BOOK3S_64_HANDLER |
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bool |
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select KVM_BOOK3S_HANDLER |
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select PPC_DAWR_FORCE_ENABLE |
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config KVM_BOOK3S_PR_POSSIBLE |
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bool |
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select KVM_MMIO |
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select MMU_NOTIFIER |
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config KVM_BOOK3S_HV_POSSIBLE |
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bool |
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config KVM_BOOK3S_32 |
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tristate "KVM support for PowerPC book3s_32 processors" |
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depends on PPC_BOOK3S_32 && !SMP && !PTE_64BIT |
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select KVM |
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select KVM_BOOK3S_32_HANDLER |
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select KVM_BOOK3S_PR_POSSIBLE |
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select PPC_FPU |
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help |
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Support running unmodified book3s_32 guest kernels |
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in virtual machines on book3s_32 host processors. |
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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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If unsure, say N. |
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config KVM_BOOK3S_64 |
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tristate "KVM support for PowerPC book3s_64 processors" |
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depends on PPC_BOOK3S_64 |
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select KVM_BOOK3S_64_HANDLER |
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select KVM |
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select KVM_BOOK3S_PR_POSSIBLE if !KVM_BOOK3S_HV_POSSIBLE |
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select SPAPR_TCE_IOMMU if IOMMU_SUPPORT && (PPC_PSERIES || PPC_POWERNV) |
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help |
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Support running unmodified book3s_64 and book3s_32 guest kernels |
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in virtual machines on book3s_64 host processors. |
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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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If unsure, say N. |
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config KVM_BOOK3S_64_HV |
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tristate "KVM for POWER7 and later using hypervisor mode in host" |
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depends on KVM_BOOK3S_64 && PPC_POWERNV |
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select KVM_BOOK3S_HV_POSSIBLE |
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select MMU_NOTIFIER |
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select CMA |
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help |
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Support running unmodified book3s_64 guest kernels in |
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virtual machines on POWER7 and newer processors that have |
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hypervisor mode available to the host. |
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If you say Y here, KVM will use the hardware virtualization |
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facilities of POWER7 (and later) processors, meaning that |
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guest operating systems will run at full hardware speed |
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using supervisor and user modes. However, this also means |
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that KVM is not usable under PowerVM (pHyp), is only usable |
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on POWER7 or later processors, and cannot emulate a |
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different processor from the host processor. |
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If unsure, say N. |
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config KVM_BOOK3S_64_PR |
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tristate "KVM support without using hypervisor mode in host" |
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depends on KVM_BOOK3S_64 |
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select KVM_BOOK3S_PR_POSSIBLE |
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help |
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Support running guest kernels in virtual machines on processors |
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without using hypervisor mode in the host, by running the |
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guest in user mode (problem state) and emulating all |
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privileged instructions and registers. |
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This is not as fast as using hypervisor mode, but works on |
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machines where hypervisor mode is not available or not usable, |
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and can emulate processors that are different from the host |
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processor, including emulating 32-bit processors on a 64-bit |
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host. |
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config KVM_BOOK3S_HV_EXIT_TIMING |
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bool "Detailed timing for hypervisor real-mode code" |
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depends on KVM_BOOK3S_HV_POSSIBLE && DEBUG_FS |
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help |
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Calculate time taken for each vcpu in the real-mode guest entry, |
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exit, and interrupt handling code, plus time spent in the guest |
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and in nap mode due to idle (cede) while other threads are still |
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in the guest. The total, minimum and maximum times in nanoseconds |
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together with the number of executions are reported in debugfs in |
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kvm/vm#/vcpu#/timings. The overhead is of the order of 30 - 40 |
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ns per exit on POWER8. |
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If unsure, say N. |
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config KVM_BOOKE_HV |
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bool |
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config KVM_EXIT_TIMING |
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bool "Detailed exit timing" |
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depends on KVM_E500V2 || KVM_E500MC |
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help |
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Calculate elapsed time for every exit/enter cycle. A per-vcpu |
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report is available in debugfs kvm/vm#_vcpu#_timing. |
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The overhead is relatively small, however it is not recommended for |
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production environments. |
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If unsure, say N. |
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config KVM_E500V2 |
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bool "KVM support for PowerPC E500v2 processors" |
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depends on E500 && !PPC_E500MC |
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select KVM |
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select KVM_MMIO |
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select MMU_NOTIFIER |
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help |
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Support running unmodified E500 guest kernels in virtual machines on |
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E500v2 host processors. |
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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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If unsure, say N. |
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config KVM_E500MC |
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bool "KVM support for PowerPC E500MC/E5500/E6500 processors" |
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depends on PPC_E500MC |
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select KVM |
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select KVM_MMIO |
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select KVM_BOOKE_HV |
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select MMU_NOTIFIER |
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help |
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Support running unmodified E500MC/E5500/E6500 guest kernels in |
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virtual machines on E500MC/E5500/E6500 host processors. |
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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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If unsure, say N. |
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config KVM_MPIC |
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bool "KVM in-kernel MPIC emulation" |
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depends on KVM && E500 |
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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_MSI |
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help |
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Enable support for emulating MPIC devices inside the |
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host kernel, rather than relying on userspace to emulate. |
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Currently, support is limited to certain versions of |
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Freescale's MPIC implementation. |
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config KVM_XICS |
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bool "KVM in-kernel XICS emulation" |
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depends on KVM_BOOK3S_64 && !KVM_MPIC |
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select HAVE_KVM_IRQCHIP |
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select HAVE_KVM_IRQFD |
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default y |
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help |
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Include support for the XICS (eXternal Interrupt Controller |
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Specification) interrupt controller architecture used on |
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IBM POWER (pSeries) servers. |
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config KVM_XIVE |
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bool |
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default y |
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depends on KVM_XICS && PPC_XIVE_NATIVE && KVM_BOOK3S_HV_POSSIBLE |
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endif # VIRTUALIZATION
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