d21a1c83c7
The CONFIG_KVM_ARM_MAX_VCPUS symbol is needed in order to build the
kernel/context_tracking.c code, which includes the vgic data structures
implictly through the kvm headers. Definining the symbol to zero
on builds without KVM resolves this build error:
In file included from include/linux/kvm_host.h:33:0,
from kernel/context_tracking.c:18:
arch/arm/include/asm/kvm_host.h:28:23: warning: "CONFIG_KVM_ARM_MAX_VCPUS" is not defined [-Wundef]
#define KVM_MAX_VCPUS CONFIG_KVM_ARM_MAX_VCPUS
^
arch/arm/include/asm/kvm_vgic.h:34:24: note: in expansion of macro 'KVM_MAX_VCPUS'
#define VGIC_MAX_CPUS KVM_MAX_VCPUS
^
arch/arm/include/asm/kvm_vgic.h:38:6: note: in expansion of macro 'VGIC_MAX_CPUS'
#if (VGIC_MAX_CPUS > 8)
^
In file included from arch/arm/include/asm/kvm_host.h:41:0,
from include/linux/kvm_host.h:33,
from kernel/context_tracking.c:18:
arch/arm/include/asm/kvm_vgic.h:59:11: error: 'CONFIG_KVM_ARM_MAX_VCPUS' undeclared here (not in a function)
} percpu[VGIC_MAX_CPUS];
^
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Christoffer Dall <cdall@cs.columbia.edu>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Christoffer Dall <cdall@cs.columbia.edu>
72 lines
1.8 KiB
Text
72 lines
1.8 KiB
Text
#
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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 "Kernel-based Virtual Machine (KVM) support"
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select PREEMPT_NOTIFIERS
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select ANON_INODES
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select KVM_MMIO
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select KVM_ARM_HOST
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depends on ARM_VIRT_EXT && ARM_LPAE
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---help---
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Support hosting virtualized guest machines. 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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If unsure, say N.
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config KVM_ARM_HOST
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bool "KVM host support for ARM cpus."
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depends on KVM
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depends on MMU
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select MMU_NOTIFIER
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---help---
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Provides host support for ARM processors.
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config KVM_ARM_MAX_VCPUS
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int "Number maximum supported virtual CPUs per VM" if KVM_ARM_HOST
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default 4 if KVM_ARM_HOST
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default 0
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help
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Static number of max supported virtual CPUs per VM.
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If you choose a high number, the vcpu structures will be quite
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large, so only choose a reasonable number that you expect to
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actually use.
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config KVM_ARM_VGIC
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bool "KVM support for Virtual GIC"
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depends on KVM_ARM_HOST && OF
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select HAVE_KVM_IRQCHIP
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default y
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---help---
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Adds support for a hardware assisted, in-kernel GIC emulation.
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config KVM_ARM_TIMER
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bool "KVM support for Architected Timers"
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depends on KVM_ARM_VGIC && ARM_ARCH_TIMER
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select HAVE_KVM_IRQCHIP
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default y
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---help---
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Adds support for the Architected Timers in virtual machines
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source drivers/virtio/Kconfig
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endif # VIRTUALIZATION
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