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After the vcpu_load/vcpu_put pushdown, the handling of asynchronous VCPU ioctl is already much clearer in that it is obvious that they bypass vcpu_load and vcpu_put. However, it is still not perfect in that the different state of the VCPU mutex is still hidden in the caller. Separate those ioctls into a new function kvm_arch_vcpu_async_ioctl that returns -ENOIOCTLCMD for more "traditional" synchronous ioctls. Cc: James Hogan <jhogan@kernel.org> Cc: Paul Mackerras <paulus@ozlabs.org> Cc: Christian Borntraeger <borntraeger@de.ibm.com> Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org> Reviewed-by: Cornelia Huck <cohuck@redhat.com> Suggested-by: Cornelia Huck <cohuck@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
63 lines
1.6 KiB
Plaintext
63 lines
1.6 KiB
Plaintext
# 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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def_bool y
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prompt "KVM"
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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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def_tristate y
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prompt "Kernel-based Virtual Machine (KVM) support"
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depends on HAVE_KVM
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select PREEMPT_NOTIFIERS
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select ANON_INODES
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select HAVE_KVM_CPU_RELAX_INTERCEPT
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select HAVE_KVM_VCPU_ASYNC_IOCTL
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select HAVE_KVM_EVENTFD
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select KVM_ASYNC_PF
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select KVM_ASYNC_PF_SYNC
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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_INVALID_WAKEUPS
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select SRCU
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select KVM_VFIO
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---help---
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Support hosting paravirtualized guest machines using the SIE
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virtualization capability on the mainframe. This should work
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on any 64bit machine.
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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_S390_UCONTROL
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bool "Userspace controlled virtual machines"
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depends on KVM
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---help---
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Allow CAP_SYS_ADMIN users to create KVM virtual machines that are
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controlled by userspace.
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If unsure, say N.
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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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endif # VIRTUALIZATION
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