linux/virt/kvm/Kconfig
Paolo Bonzini 3a373e027d KVM: fix direction of dependency on MMU notifiers
KVM_GENERIC_MEMORY_ATTRIBUTES requires the generic MMU notifier code, because
it uses kvm_mmu_invalidate_begin/end.  However, it would not work with a bespoke
implementation of MMU notifiers that does not use KVM_GENERIC_MMU_NOTIFIER,
because most likely it would not synchronize correctly on invalidation.  So
the right thing to do is to note the problematic configuration if the
architecture does not select itself KVM_GENERIC_MMU_NOTIFIER; not to
enable it blindly.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2024-01-08 08:09:38 -05:00

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# SPDX-License-Identifier: GPL-2.0
# KVM common configuration items and defaults
config HAVE_KVM
bool
config KVM_COMMON
bool
select EVENTFD
select INTERVAL_TREE
select PREEMPT_NOTIFIERS
config HAVE_KVM_PFNCACHE
bool
config HAVE_KVM_IRQCHIP
bool
config HAVE_KVM_IRQ_ROUTING
bool
config HAVE_KVM_DIRTY_RING
bool
# Only strongly ordered architectures can select this, as it doesn't
# put any explicit constraint on userspace ordering. They can also
# select the _ACQ_REL version.
config HAVE_KVM_DIRTY_RING_TSO
bool
select HAVE_KVM_DIRTY_RING
depends on X86
# Weakly ordered architectures can only select this, advertising
# to userspace the additional ordering requirements.
config HAVE_KVM_DIRTY_RING_ACQ_REL
bool
select HAVE_KVM_DIRTY_RING
# Allow enabling both the dirty bitmap and dirty ring. Only architectures
# that need to dirty memory outside of a vCPU context should select this.
config NEED_KVM_DIRTY_RING_WITH_BITMAP
bool
depends on HAVE_KVM_DIRTY_RING
config KVM_MMIO
bool
config KVM_ASYNC_PF
bool
# Toggle to switch between direct notification and batch job
config KVM_ASYNC_PF_SYNC
bool
config HAVE_KVM_MSI
bool
config HAVE_KVM_CPU_RELAX_INTERCEPT
bool
config KVM_VFIO
bool
config HAVE_KVM_INVALID_WAKEUPS
bool
config KVM_GENERIC_DIRTYLOG_READ_PROTECT
bool
config KVM_COMPAT
def_bool y
depends on KVM && COMPAT && !(S390 || ARM64 || RISCV)
config HAVE_KVM_IRQ_BYPASS
bool
config HAVE_KVM_VCPU_ASYNC_IOCTL
bool
config HAVE_KVM_VCPU_RUN_PID_CHANGE
bool
config HAVE_KVM_NO_POLL
bool
config KVM_XFER_TO_GUEST_WORK
bool
config HAVE_KVM_PM_NOTIFIER
bool
config KVM_GENERIC_HARDWARE_ENABLING
bool
config KVM_GENERIC_MMU_NOTIFIER
select MMU_NOTIFIER
bool
config KVM_GENERIC_MEMORY_ATTRIBUTES
depends on KVM_GENERIC_MMU_NOTIFIER
bool
config KVM_PRIVATE_MEM
select XARRAY_MULTI
bool
config KVM_GENERIC_PRIVATE_MEM
select KVM_GENERIC_MEMORY_ATTRIBUTES
select KVM_PRIVATE_MEM
bool