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![Sean Christopherson](/assets/img/avatar_default.png)
Introduce GUEST_PERF_EVENTS and require architectures to select it to allow registering and using guest callbacks in perf. This will hopefully make it more difficult for new architectures to add useless "support" for guest callbacks, e.g. via copy+paste. Stubbing out the helpers has the happy bonus of avoiding a load of perf_guest_cbs when GUEST_PERF_EVENTS=n on arm64/x86. Signed-off-by: Sean Christopherson <seanjc@google.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Link: https://lore.kernel.org/r/20211111020738.2512932-9-seanjc@google.com
94 lines
2.2 KiB
Text
94 lines
2.2 KiB
Text
# SPDX-License-Identifier: GPL-2.0
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#
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# This Kconfig describes xen options
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#
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config XEN
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bool "Xen guest support"
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depends on PARAVIRT
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select PARAVIRT_CLOCK
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select X86_HV_CALLBACK_VECTOR
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depends on X86_64 || (X86_32 && X86_PAE)
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depends on X86_LOCAL_APIC && X86_TSC
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help
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This is the Linux Xen port. Enabling this will allow the
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kernel to boot in a paravirtualized environment under the
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Xen hypervisor.
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config XEN_PV
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bool "Xen PV guest support"
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default y
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depends on XEN
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depends on X86_64
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select PARAVIRT_XXL
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select XEN_HAVE_PVMMU
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select XEN_HAVE_VPMU
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select GUEST_PERF_EVENTS
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help
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Support running as a Xen PV guest.
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config XEN_512GB
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bool "Limit Xen pv-domain memory to 512GB"
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depends on XEN_PV
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default y
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help
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Limit paravirtualized user domains to 512GB of RAM.
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The Xen tools and crash dump analysis tools might not support
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pv-domains with more than 512 GB of RAM. This option controls the
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default setting of the kernel to use only up to 512 GB or more.
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It is always possible to change the default via specifying the
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boot parameter "xen_512gb_limit".
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config XEN_PV_SMP
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def_bool y
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depends on XEN_PV && SMP
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config XEN_PV_DOM0
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def_bool y
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depends on XEN_PV && XEN_DOM0
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config XEN_PVHVM
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def_bool y
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depends on XEN && X86_LOCAL_APIC
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config XEN_PVHVM_SMP
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def_bool y
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depends on XEN_PVHVM && SMP
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config XEN_PVHVM_GUEST
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bool "Xen PVHVM guest support"
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default y
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depends on XEN_PVHVM && PCI
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help
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Support running as a Xen PVHVM guest.
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config XEN_SAVE_RESTORE
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bool
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depends on XEN
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select HIBERNATE_CALLBACKS
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default y
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config XEN_DEBUG_FS
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bool "Enable Xen debug and tuning parameters in debugfs"
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depends on XEN && DEBUG_FS
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help
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Enable statistics output and various tuning options in debugfs.
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Enabling this option may incur a significant performance overhead.
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config XEN_PVH
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bool "Xen PVH guest support"
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depends on XEN && XEN_PVHVM && ACPI
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select PVH
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def_bool n
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help
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Support for running as a Xen PVH guest.
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config XEN_DOM0
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bool "Xen Dom0 support"
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default XEN_PV
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depends on (XEN_PV && SWIOTLB_XEN) || (XEN_PVH && X86_64)
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depends on X86_IO_APIC && ACPI && PCI
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select X86_X2APIC if XEN_PVH && X86_64
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help
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Support running as a Xen Dom0 guest.
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