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This reverts commits99101dda29andb80b701d5a. Linus reports that the sysreg reserved bit checks in KVM have led to build failures, arising from commitfdd867fe9b("arm64/sysreg: Add register fields for ID_AA64DFR1_EL1") giving meaning to fields that were previously RES0. Of course, this is a genuine issue, since KVM's sysreg emulation depends heavily on the definition of reserved fields. But at this point the build breakage is far more offensive, and the right course of action is to revert and retry later. All of these build-time assertions were on by default before commit99101dda29("KVM: arm64: Make build-time check of RES0/RES1 bits optional"), so deliberately revert it all atomically to avoid introducing further breakage of bisection. Link: https://lore.kernel.org/all/CAHk-=whCvkhc8BbFOUf1ddOsgSGgEjwoKv77=HEY1UiVCydGqw@mail.gmail.com/ Acked-by: Marc Zyngier <maz@kernel.org> Signed-off-by: Oliver Upton <oliver.upton@linux.dev> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
69 lines
1.8 KiB
Plaintext
69 lines
1.8 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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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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select KVM_COMMON
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select KVM_GENERIC_HARDWARE_ENABLING
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select KVM_GENERIC_MMU_NOTIFIER
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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_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 HAVE_KVM_IRQ_BYPASS
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select HAVE_KVM_READONLY_MEM
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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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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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