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# SPDX-License-Identifier: GPL-2.0
#
# This Kconfig describes xen options
#
config XEN
bool "Xen guest support"
depends on PARAVIRT
select PARAVIRT_CLOCK
select X86_HV_CALLBACK_VECTOR
depends on X86_64 || (X86_32 && X86_PAE)
depends on X86_64 || (X86_GENERIC || MPENTIUM4 || MCORE2 || MATOM || MK8)
depends on X86_LOCAL_APIC && X86_TSC
help
This is the Linux Xen port. Enabling this will allow the
kernel to boot in a paravirtualized environment under the
Xen hypervisor.
config XEN_PV
bool "Xen PV guest support"
default y
depends on XEN
depends on X86_64
select PARAVIRT_XXL
select XEN_HAVE_PVMMU
select XEN_HAVE_VPMU
select GUEST_PERF_EVENTS
help
Support running as a Xen PV guest.
config XEN_512GB
bool "Limit Xen pv-domain memory to 512GB"
depends on XEN_PV
default y
help
Limit paravirtualized user domains to 512GB of RAM.
The Xen tools and crash dump analysis tools might not support
pv-domains with more than 512 GB of RAM. This option controls the
default setting of the kernel to use only up to 512 GB or more.
It is always possible to change the default via specifying the
boot parameter "xen_512gb_limit".
config XEN_PV_SMP
def_bool y
depends on XEN_PV && SMP
config XEN_PV_DOM0
def_bool y
depends on XEN_PV && XEN_DOM0
config XEN_PVHVM
def_bool y
depends on XEN && X86_LOCAL_APIC
config XEN_PVHVM_SMP
def_bool y
depends on XEN_PVHVM && SMP
config XEN_PVHVM_GUEST
bool "Xen PVHVM guest support"
default y
depends on XEN_PVHVM && PCI
help
Support running as a Xen PVHVM guest.
config XEN_SAVE_RESTORE
bool
depends on XEN
select HIBERNATE_CALLBACKS
default y
config XEN_DEBUG_FS
bool "Enable Xen debug and tuning parameters in debugfs"
depends on XEN && DEBUG_FS
help
Enable statistics output and various tuning options in debugfs.
Enabling this option may incur a significant performance overhead.
config XEN_PVH
bool "Xen PVH guest support"
depends on XEN && XEN_PVHVM && ACPI
select PVH
help
Support for running as a Xen PVH guest.
config XEN_DOM0
bool "Xen Dom0 support"
default XEN_PV
depends on (XEN_PV && SWIOTLB_XEN) || (XEN_PVH && X86_64)
depends on X86_IO_APIC && ACPI && PCI
select X86_X2APIC if XEN_PVH && X86_64
help
Support running as a Xen Dom0 guest.
config XEN_PV_MSR_SAFE
bool "Always use safe MSR accesses in PV guests"
default y
depends on XEN_PV
help
Use safe (not faulting) MSR access functions even if the MSR access
should not fault anyway.
The default can be changed by using the "xen_msr_safe" boot parameter.
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