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Linux/arch/x86/xen/Kconfig

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  1 # SPDX-License-Identifier: GPL-2.0
  2 #
  3 # This Kconfig describes xen options
  4 #
  5 
  6 config XEN
  7         bool "Xen guest support"
  8         depends on PARAVIRT
  9         select PARAVIRT_CLOCK
 10         select X86_HV_CALLBACK_VECTOR
 11         depends on X86_64 || (X86_32 && X86_PAE)
 12         depends on X86_64 || (X86_GENERIC || MPENTIUM4 || MCORE2 || MATOM || MK8)
 13         depends on X86_LOCAL_APIC && X86_TSC
 14         help
 15           This is the Linux Xen port.  Enabling this will allow the
 16           kernel to boot in a paravirtualized environment under the
 17           Xen hypervisor.
 18 
 19 config XEN_PV
 20         bool "Xen PV guest support"
 21         default y
 22         depends on XEN
 23         depends on X86_64
 24         select PARAVIRT_XXL
 25         select XEN_HAVE_PVMMU
 26         select XEN_HAVE_VPMU
 27         select GUEST_PERF_EVENTS
 28         help
 29           Support running as a Xen PV guest.
 30 
 31 config XEN_512GB
 32         bool "Limit Xen pv-domain memory to 512GB"
 33         depends on XEN_PV
 34         default y
 35         help
 36           Limit paravirtualized user domains to 512GB of RAM.
 37 
 38           The Xen tools and crash dump analysis tools might not support
 39           pv-domains with more than 512 GB of RAM. This option controls the
 40           default setting of the kernel to use only up to 512 GB or more.
 41           It is always possible to change the default via specifying the
 42           boot parameter "xen_512gb_limit".
 43 
 44 config XEN_PV_SMP
 45         def_bool y
 46         depends on XEN_PV && SMP
 47 
 48 config XEN_PV_DOM0
 49         def_bool y
 50         depends on XEN_PV && XEN_DOM0
 51 
 52 config XEN_PVHVM
 53         def_bool y
 54         depends on XEN && X86_LOCAL_APIC
 55 
 56 config XEN_PVHVM_SMP
 57         def_bool y
 58         depends on XEN_PVHVM && SMP
 59 
 60 config XEN_PVHVM_GUEST
 61         bool "Xen PVHVM guest support"
 62         default y
 63         depends on XEN_PVHVM && PCI
 64         help
 65           Support running as a Xen PVHVM guest.
 66 
 67 config XEN_SAVE_RESTORE
 68         bool
 69         depends on XEN
 70         select HIBERNATE_CALLBACKS
 71         default y
 72 
 73 config XEN_DEBUG_FS
 74         bool "Enable Xen debug and tuning parameters in debugfs"
 75         depends on XEN && DEBUG_FS
 76         help
 77           Enable statistics output and various tuning options in debugfs.
 78           Enabling this option may incur a significant performance overhead.
 79 
 80 config XEN_PVH
 81         bool "Xen PVH guest support"
 82         depends on XEN && XEN_PVHVM && ACPI
 83         select PVH
 84         help
 85           Support for running as a Xen PVH guest.
 86 
 87 config XEN_DOM0
 88         bool "Xen Dom0 support"
 89         default XEN_PV
 90         depends on (XEN_PV && SWIOTLB_XEN) || (XEN_PVH && X86_64)
 91         depends on X86_IO_APIC && ACPI && PCI
 92         select X86_X2APIC if XEN_PVH && X86_64
 93         help
 94           Support running as a Xen Dom0 guest.
 95 
 96 config XEN_PV_MSR_SAFE
 97         bool "Always use safe MSR accesses in PV guests"
 98         default y
 99         depends on XEN_PV
100         help
101           Use safe (not faulting) MSR access functions even if the MSR access
102           should not fault anyway.
103           The default can be changed by using the "xen_msr_safe" boot parameter.

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