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drivers: vhost: Add Xen-MMIO VIRTIO backend #91605

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drivers: vhost: Add Xen-MMIO VIRTIO backend #91605

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25056b2
drivers: xen: add xen version hypercall
dsemenets May 31, 2023
fff9abd
drivers: xen: dom0: add Xen sysctl hypercall
dsemenets May 31, 2023
a151a04
drivers: xen: dom0: add getvcpuinfo domctl call
dsemenets May 31, 2023
a579520
xen: domctl: fix function parameter name in set/get_paging_mempool_size
Deedone Apr 29, 2024
4a66a7d
xen: domctl: add doxygen comments for domctl functions
Deedone Apr 29, 2024
1e74e98
xen: domctl: Get back created domain id
Deedone Apr 24, 2024
89ae6a2
xen: Add support for changing Xen Domctl interface version
Deedone Jun 14, 2024
962319c
xen: Add support for changing Xen Sysctl interface version
Deedone Jun 14, 2024
b16cc64
drivers: xen: add DMOP hypercall wrappers
soburi May 18, 2025
f4256f3
[DNM] manifest: add `zephyr-xenlib` module
soburi Jun 13, 2025
32e0fd0
drivers: Introduce vhost driver subsystem
soburi Jul 21, 2025
edec3d4
drivers: vhost: add Xen MMIO VirtIO backend
soburi Jun 13, 2025
3641e2d
samples: drivers: virtualization: add vhost sample application
soburi May 17, 2025
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22 changes: 22 additions & 0 deletions arch/arm64/core/xen/Kconfig
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Original file line number Diff line number Diff line change
Expand Up @@ -33,3 +33,25 @@ config XEN_INTERFACE_VERSION
help
Xen interface version to use. This is the version of the
interface that Zephyr will use to communicate with the hypervisor.

config XEN_DOMCTL_INTERFACE_VERSION
hex "Xen Domctl interface version"
default 0x17
range 0x15 0x17
depends on XEN
help
Xen Domctl interface version to use. This is the version of the
domctl interface that Zephyr will use to communicate with
the hypervisor. The default value is the latest version supported
by the kernel.

config XEN_SYSCTL_INTERFACE_VERSION
hex "Xen Sysctl interface version"
default 0x15
range 0x15 0x15
depends on XEN
help
Xen Sysctl interface version to use. This is the version of the
domctl interface that Zephyr will use to communicate with
the hypervisor. The default value is the latest version supported
by the kernel.
5 changes: 4 additions & 1 deletion arch/arm64/core/xen/hypercall.S
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@@ -1,6 +1,6 @@
/* SPDX-License-Identifier: Apache-2.0 */
/*
* Copyright (c) 2021-2023 EPAM Systems
* Copyright (c) 2021-2025 EPAM Systems
*/

#include <zephyr/toolchain.h>
Expand All @@ -23,7 +23,10 @@ HYPERCALL(sched_op);
HYPERCALL(event_channel_op);
HYPERCALL(hvm_op);
HYPERCALL(memory_op);
HYPERCALL(dm_op);
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@firscity firscity Aug 8, 2025

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Generic comment regarding commit message for arch: arm64: core: xen: hypercall: Add dm_op hypercall:

You need to not only describe what was added, but also explain why it is needed in Zephyr and how it will be used.

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@soburi soburi Oct 13, 2025

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I have separated the PR to #96727. This has also been looked at. I think it will be merged soon, so I plan to rebase it. Thank you.

HYPERCALL(xen_version);

#ifdef CONFIG_XEN_DOM0
HYPERCALL(domctl);
HYPERCALL(sysctl);
#endif
1 change: 1 addition & 0 deletions drivers/CMakeLists.txt
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Expand Up @@ -93,6 +93,7 @@ add_subdirectory_ifdef(CONFIG_STEPPER stepper)
add_subdirectory_ifdef(CONFIG_SYSCON syscon)
add_subdirectory_ifdef(CONFIG_SYS_CLOCK_EXISTS timer)
add_subdirectory_ifdef(CONFIG_TEE tee)
add_subdirectory_ifdef(CONFIG_VHOST vhost)
add_subdirectory_ifdef(CONFIG_VIDEO video)
add_subdirectory_ifdef(CONFIG_VIRTIO virtio)
add_subdirectory_ifdef(CONFIG_VIRTUALIZATION virtualization)
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1 change: 1 addition & 0 deletions drivers/Kconfig
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Expand Up @@ -92,6 +92,7 @@ source "drivers/syscon/Kconfig"
source "drivers/timer/Kconfig"
source "drivers/usb/Kconfig"
source "drivers/usb_c/Kconfig"
source "drivers/vhost/Kconfig"
source "drivers/video/Kconfig"
source "drivers/virtio/Kconfig"
source "drivers/virtualization/Kconfig"
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7 changes: 7 additions & 0 deletions drivers/vhost/CMakeLists.txt
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Original file line number Diff line number Diff line change
@@ -0,0 +1,7 @@
# Copyright (c) 2025 TOKITA Hiroshi
# SPDX-License-Identifier: Apache-2.0

zephyr_library()

zephyr_library_sources_ifdef(CONFIG_VHOST vringh.c)
zephyr_library_sources_ifdef(CONFIG_VHOST_XEN_MMIO vhost_xen_mmio.c)
24 changes: 24 additions & 0 deletions drivers/vhost/Kconfig
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@@ -0,0 +1,24 @@
# Copyright (c) 2025 TOKITA Hiroshi
# SPDX-License-Identifier: Apache-2.0

config VHOST
bool "support for VIRTIO"
help
Enable options for VIRTIO

if VHOST

config VHOST_XEN_MMIO
bool "support for MMIO-based VIRTIO backend on Xen hypervisor"
default y
depends on DT_HAS_XEN_VHOST_MMIO_ENABLED
select XEN_STORE_CLI
select XEN_DMOP
help
Enable VIRTIO-MMIO backend on Xen hypervisor

endif # VIRTIO

module = VHOST
module-str = VHOST
source "subsys/logging/Kconfig.template.log_config"
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