docs/devel/kconfig.rst

13 SCSI adapters.  Arm, s390 and x86 boards can all present a virtio-blk
21 QEMU uses a simple domain-specific language to describe the dependencies
28   user can add to that board;
36 This domain-specific language is based on the Kconfig language that
37 originated in the Linux kernel, though it was heavily simplified and
40 Unlike Linux, there is no user interface to edit the configuration, which
41 is instead specified in per-target files under the ``configs/``
42 directory of the QEMU source tree.  This is because, unlike Linux,
48 --------------------
78 include it for clarity and future-proofing.  After ``bool`` the following
99   Note that unlike Linux's Kconfig implementation, QEMU will detect
106   set by the user via ``configs/*.mak`` files, and only if
136 ------------------------------------
199   for example only VFIO (passthrough) and virtio-pci devices.
202   board (and not ones which are very board-specific or that need
215       depends on SPARC && !SPARC64
258 --------------------------------------------
261 a file called ``configs/TARGETNAME-softmmu.mak``.  These files
262 initialize some Kconfig variables to non-default values and provide the
267     # Default configuration for alpha-softmmu
278 The first part, consisting of commented-out ``=n`` assignments, tells
279 the user which devices or device groups are implied by the boards.
280 The second part, consisting of ``=y`` assignments, tells the user which
281 boards are supported by the target.  The user will typically modify
286 ``--without-default-devices`` option.  When this is done, everything defaults
289 are disabled.  When QEMU is built with this option, the user will probably
298 machine, and even then only if ``--nodefaults`` is specified on the
299 command line.  Starting a VM *without* ``--nodefaults`` is allowed to
301 ``--without-default-devices`` are considered bugs in the test code:
302 the tests should either use ``--nodefaults``, and should be skipped
312 ----------------
324 and also listed as follows in the top-level meson.build's host_kconfig
329       (host_os == 'linux' ? ['CONFIG_LINUX=y'] : []) + \