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Commit e91aa8e6ec ("KVM: PPC: Enable IOMMU_API for KVM_BOOK3S_64
permanently", 2017-03-22) enabled the SPAPR TCE code for all 64-bit
Book 3S kernel configurations in order to simplify the code and
reduce #ifdefs. However, 64-bit Book 3S PPC platforms other than
pseries and powernv don't implement the necessary IOMMU callbacks,
leading to build failures like the following (for a pasemi config):
scripts/kconfig/conf --silentoldconfig Kconfig
warning: (KVM_BOOK3S_64) selects SPAPR_TCE_IOMMU which has unmet direct dependencies (IOMMU_SUPPORT && (PPC_POWERNV || PPC_PSERIES))
...
CC [M] arch/powerpc/kvm/book3s_64_vio.o
/home/paulus/kernel/kvm/arch/powerpc/kvm/book3s_64_vio.c: In function ‘kvmppc_clear_tce’:
/home/paulus/kernel/kvm/arch/powerpc/kvm/book3s_64_vio.c:363:2: error: implicit declaration of function ‘iommu_tce_xchg’ [-Werror=implicit-function-declaration]
iommu_tce_xchg(tbl, entry, &hpa, &dir);
^
To fix this, we make the inclusion of the SPAPR TCE support, and the
code that uses it in book3s_vio.c and book3s_vio_hv.c, depend on
the inclusion of support for the pseries and/or powernv platforms.
This means that when running a 'pseries' guest on those platforms,
the guest won't have in-kernel acceleration of the PAPR TCE hypercalls,
but at least now they compile.
Reviewed-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
208 lines
5.9 KiB
Plaintext
208 lines
5.9 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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---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 ANON_INODES
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select HAVE_KVM_EVENTFD
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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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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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---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_SERIES || 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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source drivers/vhost/Kconfig
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endif # VIRTUALIZATION
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