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accel: Add Meson and config support for MSHV accelerator

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Introduce a Meson feature option and default-config entry to allow
building QEMU with MSHV (Microsoft Hypervisor) acceleration support.

This is the first step toward implementing an MSHV backend in QEMU.

Signed-off-by: Magnus Kulke <magnuskulke@linux.microsoft.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Link: https://lore.kernel.org/r/20250916164847.77883-2-magnuskulke@linux.microsoft.com
[Add error for unavailable accelerator. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Magnus Kulke 2025-09-16 18:48:21 +02:00 • committed by Paolo Bonzini
parent 6529f31e0d
commit 37e12da5df
4 changed files with 21 additions and 0 deletions
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3
accel/Kconfig
View file

@ -13,6 +13,9 @@ config TCG
config KVM
bool
config MSHV
bool
config XEN
bool
select FSDEV_9P if VIRTFS

13
meson.build
View file

@ -334,6 +334,7 @@ elif cpu == 'x86_64'
'CONFIG_HVF': ['x86_64-softmmu'],
'CONFIG_NVMM': ['i386-softmmu', 'x86_64-softmmu'],
'CONFIG_WHPX': ['i386-softmmu', 'x86_64-softmmu'],
'CONFIG_MSHV': ['x86_64-softmmu'],
}
endif
@ -883,6 +884,14 @@ accelerators = []
if get_option('kvm').allowed() and host_os == 'linux'
accelerators += 'CONFIG_KVM'
endif
if get_option('mshv').allowed() and host_os == 'linux'
if get_option('mshv').enabled() and host_machine.cpu() != 'x86_64'
error('mshv accelerator requires x64_64 host')
endif
accelerators += 'CONFIG_MSHV'
endif
if get_option('whpx').allowed() and host_os == 'windows'
if get_option('whpx').enabled() and host_machine.cpu() != 'x86_64'
error('WHPX requires 64-bit host')
@ -952,6 +961,9 @@ endif
if 'CONFIG_WHPX' not in accelerators and get_option('whpx').enabled()
error('WHPX not available on this platform')
endif
if 'CONFIG_MSHV' not in accelerators and get_option('mshv').enabled()
error('mshv not available on this platform')
endif
xen = not_found
if get_option('xen').enabled() or (get_option('xen').auto() and have_system)
@ -4827,6 +4839,7 @@ if have_system
summary_info += {'HVF support': config_all_accel.has_key('CONFIG_HVF')}
summary_info += {'WHPX support': config_all_accel.has_key('CONFIG_WHPX')}
summary_info += {'NVMM support': config_all_accel.has_key('CONFIG_NVMM')}
summary_info += {'MSHV support': config_all_accel.has_key('CONFIG_MSHV')}
summary_info += {'Xen support': xen.found()}
if xen.found()
summary_info += {'xen ctrl version': xen.version()}

2
meson_options.txt
View file

@ -71,6 +71,8 @@ option('malloc', type : 'combo', choices : ['system', 'tcmalloc', 'jemalloc'],
option('kvm', type: 'feature', value: 'auto',
description: 'KVM acceleration support')
option('mshv', type: 'feature', value: 'auto',
description: 'MSHV acceleration support')
option('whpx', type: 'feature', value: 'auto',
description: 'WHPX acceleration support')
option('hvf', type: 'feature', value: 'auto',

3
scripts/meson-buildoptions.sh
View file

@ -154,6 +154,7 @@ meson_options_help() {
printf "%s\n" ' membarrier membarrier system call (for Linux 4.14+ or Windows'
printf "%s\n" ' modules modules support (non Windows)'
printf "%s\n" ' mpath Multipath persistent reservation passthrough'
printf "%s\n" ' mshv MSHV acceleration support'
printf "%s\n" ' multiprocess Out of process device emulation support'
printf "%s\n" ' netmap netmap network backend support'
printf "%s\n" ' nettle nettle cryptography support'
@ -408,6 +409,8 @@ _meson_option_parse() {
--disable-modules) printf "%s" -Dmodules=disabled ;;
--enable-mpath) printf "%s" -Dmpath=enabled ;;
--disable-mpath) printf "%s" -Dmpath=disabled ;;
--enable-mshv) printf "%s" -Dmshv=enabled ;;
--disable-mshv) printf "%s" -Dmshv=disabled ;;
--enable-multiprocess) printf "%s" -Dmultiprocess=enabled ;;
--disable-multiprocess) printf "%s" -Dmultiprocess=disabled ;;
--enable-netmap) printf "%s" -Dnetmap=enabled ;;