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* kvm-arm64/tlbi-range: : . : FEAT_TLBIRANGE support, courtesy of Raghavendra Rao Ananta. : From the cover letter: : : "In certain code paths, KVM/ARM currently invalidates the entire VM's : page-tables instead of just invalidating a necessary range. For example, : when collapsing a table PTE to a block PTE, instead of iterating over : each PTE and flushing them, KVM uses 'vmalls12e1is' TLBI operation to : flush all the entries. This is inefficient since the guest would have : to refill the TLBs again, even for the addresses that aren't covered : by the table entry. The performance impact would scale poorly if many : addresses in the VM is going through this remapping. : : For architectures that implement FEAT_TLBIRANGE, KVM can replace such : inefficient paths by performing the invalidations only on the range of : addresses that are in scope. This series tries to achieve the same in : the areas of stage-2 map, unmap and write-protecting the pages." : . KVM: arm64: Use TLBI range-based instructions for unmap KVM: arm64: Invalidate the table entries upon a range KVM: arm64: Flush only the memslot after write-protect KVM: arm64: Implement kvm_arch_flush_remote_tlbs_range() KVM: arm64: Define kvm_tlb_flush_vmid_range() KVM: arm64: Implement __kvm_tlb_flush_vmid_range() arm64: tlb: Implement __flush_s2_tlb_range_op() arm64: tlb: Refactor the core flush algorithm of __flush_tlb_range KVM: Move kvm_arch_flush_remote_tlbs_memslot() to common code KVM: Allow range-based TLB invalidation from common code KVM: Remove CONFIG_HAVE_KVM_ARCH_TLB_FLUSH_ALL KVM: arm64: Use kvm_arch_flush_remote_tlbs() KVM: Declare kvm_arch_flush_remote_tlbs() globally KVM: Rename kvm_arch_flush_remote_tlb() to kvm_arch_flush_remote_tlbs() Signed-off-by: Marc Zyngier <maz@kernel.org>
75 lines
1.9 KiB
Plaintext
75 lines
1.9 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/lib/Kconfig"
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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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menuconfig KVM
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bool "Kernel-based Virtual Machine (KVM) support"
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depends on HAVE_KVM
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select KVM_GENERIC_HARDWARE_ENABLING
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select MMU_NOTIFIER
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select PREEMPT_NOTIFIERS
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select HAVE_KVM_CPU_RELAX_INTERCEPT
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select KVM_MMIO
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select KVM_GENERIC_DIRTYLOG_READ_PROTECT
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select KVM_XFER_TO_GUEST_WORK
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select KVM_VFIO
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select HAVE_KVM_EVENTFD
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select HAVE_KVM_IRQFD
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select HAVE_KVM_DIRTY_RING_ACQ_REL
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select NEED_KVM_DIRTY_RING_WITH_BITMAP
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select HAVE_KVM_MSI
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select HAVE_KVM_IRQCHIP
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select HAVE_KVM_IRQ_ROUTING
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select IRQ_BYPASS_MANAGER
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select HAVE_KVM_IRQ_BYPASS
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select HAVE_KVM_VCPU_RUN_PID_CHANGE
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select SCHED_INFO
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select GUEST_PERF_EVENTS if PERF_EVENTS
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select INTERVAL_TREE
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select XARRAY_MULTI
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help
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Support hosting virtualized guest machines.
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If unsure, say N.
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config NVHE_EL2_DEBUG
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bool "Debug mode for non-VHE EL2 object"
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depends on KVM
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help
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Say Y here to enable the debug mode for the non-VHE KVM EL2 object.
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Failure reports will BUG() in the hypervisor. This is intended for
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local EL2 hypervisor development.
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If unsure, say N.
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config PROTECTED_NVHE_STACKTRACE
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bool "Protected KVM hypervisor stacktraces"
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depends on NVHE_EL2_DEBUG
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default n
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help
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Say Y here to enable pKVM hypervisor stacktraces on hyp_panic()
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If using protected nVHE mode, but cannot afford the associated
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memory cost (less than 0.75 page per CPU) of pKVM stacktraces,
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say N.
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If unsure, or not using protected nVHE (pKVM), say N.
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endif # VIRTUALIZATION
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