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aa34b81165
It is possible to correctly do aging without taking the KVM MMU lock, or while taking it for read; add a Kconfig to let architectures do so. Architectures that select KVM_MMU_LOCKLESS_AGING are responsible for correctness. Suggested-by: Yu Zhao <yuzhao@google.com> Signed-off-by: James Houghton <jthoughton@google.com> Reviewed-by: David Matlack <dmatlack@google.com> Link: https://lore.kernel.org/r/20250204004038.1680123-3-jthoughton@google.com [sean: massage shortlog+changelog, fix Kconfig goof and shorten name] Signed-off-by: Sean Christopherson <seanjc@google.com>
131 lines
2.6 KiB
Plaintext
131 lines
2.6 KiB
Plaintext
# SPDX-License-Identifier: GPL-2.0
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# KVM common configuration items and defaults
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config KVM_COMMON
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bool
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select EVENTFD
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select INTERVAL_TREE
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select PREEMPT_NOTIFIERS
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config HAVE_KVM_PFNCACHE
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bool
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config HAVE_KVM_IRQCHIP
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bool
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config HAVE_KVM_IRQ_ROUTING
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bool
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config HAVE_KVM_DIRTY_RING
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bool
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# Only strongly ordered architectures can select this, as it doesn't
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# put any explicit constraint on userspace ordering. They can also
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# select the _ACQ_REL version.
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config HAVE_KVM_DIRTY_RING_TSO
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bool
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select HAVE_KVM_DIRTY_RING
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depends on X86
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# Weakly ordered architectures can only select this, advertising
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# to userspace the additional ordering requirements.
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config HAVE_KVM_DIRTY_RING_ACQ_REL
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bool
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select HAVE_KVM_DIRTY_RING
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# Allow enabling both the dirty bitmap and dirty ring. Only architectures
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# that need to dirty memory outside of a vCPU context should select this.
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config NEED_KVM_DIRTY_RING_WITH_BITMAP
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bool
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depends on HAVE_KVM_DIRTY_RING
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config KVM_MMIO
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bool
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config KVM_ASYNC_PF
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bool
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# Toggle to switch between direct notification and batch job
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config KVM_ASYNC_PF_SYNC
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bool
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config HAVE_KVM_MSI
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bool
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config HAVE_KVM_READONLY_MEM
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bool
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config HAVE_KVM_CPU_RELAX_INTERCEPT
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bool
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config KVM_VFIO
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bool
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config HAVE_KVM_INVALID_WAKEUPS
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bool
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config KVM_GENERIC_DIRTYLOG_READ_PROTECT
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bool
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config KVM_GENERIC_PRE_FAULT_MEMORY
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bool
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config KVM_COMPAT
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def_bool y
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depends on KVM && COMPAT && !(S390 || ARM64 || RISCV)
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config HAVE_KVM_IRQ_BYPASS
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bool
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select IRQ_BYPASS_MANAGER
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config HAVE_KVM_VCPU_ASYNC_IOCTL
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bool
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config HAVE_KVM_VCPU_RUN_PID_CHANGE
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bool
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config HAVE_KVM_NO_POLL
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bool
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config KVM_XFER_TO_GUEST_WORK
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bool
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config HAVE_KVM_PM_NOTIFIER
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bool
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config KVM_GENERIC_HARDWARE_ENABLING
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bool
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config KVM_GENERIC_MMU_NOTIFIER
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select MMU_NOTIFIER
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bool
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config KVM_ELIDE_TLB_FLUSH_IF_YOUNG
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depends on KVM_GENERIC_MMU_NOTIFIER
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bool
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config KVM_MMU_LOCKLESS_AGING
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depends on KVM_GENERIC_MMU_NOTIFIER
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bool
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config KVM_GENERIC_MEMORY_ATTRIBUTES
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depends on KVM_GENERIC_MMU_NOTIFIER
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bool
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config KVM_PRIVATE_MEM
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select XARRAY_MULTI
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bool
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config KVM_GENERIC_PRIVATE_MEM
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select KVM_GENERIC_MEMORY_ATTRIBUTES
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select KVM_PRIVATE_MEM
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bool
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config HAVE_KVM_ARCH_GMEM_PREPARE
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bool
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depends on KVM_PRIVATE_MEM
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config HAVE_KVM_ARCH_GMEM_INVALIDATE
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bool
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depends on KVM_PRIVATE_MEM
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