linux.git/tools/virtio, branch v7.2-rc1

tools/virtio: fix build for kmalloc_obj API and missing stubs

2026-06-10T06:16:59+00:00

Add stubs for kmalloc_obj() and kmalloc_objs() to the tools/virtio
test harness, matching the new kernel allocator API. Also add the
DMA_ATTR_CPU_CACHE_CLEAN definition and include kernel.h from err.h
for the unlikely() macro.

Assisted-by: Claude:claude-opus-4-6
Signed-off-by: Michael S. Tsirkin 
Message-ID:

tools/virtio: check mmap return value in vringh_test

2026-06-10T06:16:59+00:00

In parallel_test(), the return values of mmap() for both host_map and
guest_map are not checked against MAP_FAILED. If mmap() fails, the
subsequent code will dereference the invalid pointer, leading to a
segmentation fault.

Add MAP_FAILED checks after both mmap() calls, using err() to report
the error and exit, consistent with the existing error handling style
in this file (e.g., the open() call on line 149).

Fixes: 1515c5ce26ae ("tools/virtio: add vring_test.")
Signed-off-by: longlong yan 
Signed-off-by: Michael S. Tsirkin 
Message-ID: <20260605021446.1611-1-yanlonglong@kylinos.cn>

tools/virtio: add device, device_driver stubs

2025-12-24T13:02:56+00:00

Add stubs needed by virtio.h

Message-ID: <0fabf13f6ea812ebc73b1c919fb17d4dec1545db.1764873799.git.mst@redhat.com>
Acked-by: Jason Wang 
Signed-off-by: Michael S. Tsirkin

tools/virtio: fix up oot build

2025-12-24T13:02:56+00:00

oot build tends to help uncover bugs so it's worth keeping around,
as long as it's low effort.
add stubs for a couple of macros virtio gained recently,
and disable vdpa in the test build.

Message-ID: <33968faa7994b86d1f78057358a50b8f460c7a23.1764873799.git.mst@redhat.com>
Acked-by: Jason Wang 
Signed-off-by: Michael S. Tsirkin

tools/virtio: switch to kernel's virtio_config.h

2025-12-24T13:02:56+00:00

Drops stubs in virtio_config.h, use the kernel's version instead - we
are now activly developing it, so the stub became too hard to maintain.

Message-ID: <8e5c85dc8aad001f161f7e2d8799ffbccfc31381.1764873799.git.mst@redhat.com>
Acked-by: Jason Wang 
Signed-off-by: Michael S. Tsirkin

tools/virtio: stub might_sleep and synchronize_rcu

2025-12-24T13:02:56+00:00

Add might_sleep() and synchronize_rcu() stubs needed by virtio_config.h.

might_sleep() is a no-op, synchronize_rcu doesn't work but we don't
need it to.

Created using Cursor CLI.

Message-ID: <5557e026335d808acd7b890693ee1382e73dd33a.1764873799.git.mst@redhat.com>
Acked-by: Jason Wang 
Signed-off-by: Michael S. Tsirkin

tools/virtio: add struct cpumask to cpumask.h

2025-12-24T13:02:56+00:00

Add struct cpumask stub used by virtio_config.h.

Created using Cursor CLI.

Message-ID: 
Acked-by: Jason Wang 
Signed-off-by: Michael S. Tsirkin

tools/virtio: pass KCFLAGS to module build

2025-12-24T13:02:56+00:00

Update the mod target to pass KCFLAGS with the in-tree vhost driver
include path. This way vhost_test can find vhost headers.

Created using Cursor CLI.

Message-ID: <5473e5a5dfd2fcd261a778f2017cac669c031f23.1764873799.git.mst@redhat.com>
Acked-by: Jason Wang 
Signed-off-by: Michael S. Tsirkin

tools/virtio: add ucopysize.h stub

2025-12-24T13:02:56+00:00

Add ucopysize.h with stub implementations of check_object_size,
copy_overflow, and check_copy_size.

Created using Cursor CLI.

Message-ID: <5046df90002bb744609248404b81d33b559fe813.1764873799.git.mst@redhat.com>
Acked-by: Jason Wang 
Signed-off-by: Michael S. Tsirkin

tools/virtio: add dev_WARN_ONCE and is_vmalloc_addr stubs

2025-12-24T13:02:56+00:00

Add dev_WARN_ONCE and is_vmalloc_addr stubs needed by virtio_ring.c.
is_vmalloc_addr stub always returns false - that's fine since it's
merely a sanity check.

Created using Cursor CLI.

Message-ID: <749e7a03b7cd56baf50a27efc3b05e50cf8f36b6.1764873799.git.mst@redhat.com>
Acked-by: Jason Wang 
Signed-off-by: Michael S. Tsirkin