diff options
Diffstat (limited to 'docs')
| -rw-r--r-- | docs/about/deprecated.rst | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/docs/about/deprecated.rst b/docs/about/deprecated.rst index 4a3c302962..29de49351d 100644 --- a/docs/about/deprecated.rst +++ b/docs/about/deprecated.rst @@ -204,6 +204,27 @@ is going to be so much slower it wouldn't make sense for any serious instrumentation. Due to implementation differences there will also be anomalies in things like memory instrumentation. +linux-user mode CPUs +-------------------- + +iwMMXt emulation and the ``pxa`` CPUs (since 10.0) +'''''''''''''''''''''''''''''''''''''''''''''''''' + +The ``pxa`` CPU family (``pxa250``, ``pxa255``, ``pxa260``, +``pxa261``, ``pxa262``, ``pxa270-a0``, ``pxa270-a1``, ``pxa270``, +``pxa270-b0``, ``pxa270-b1``, ``pxa270-c0``, ``pxa270-c5``) are no +longer used in system emulation, because all the machine types which +used these CPUs were removed in the QEMU 9.2 release. These CPUs can +now only be used in linux-user mode, and to do that you would have to +explicitly select one of these CPUs with the ``-cpu`` command line +option or the ``QEMU_CPU`` environment variable. + +We don't believe that anybody is using the iwMMXt emulation, and we do +not have any tests to validate it or any real hardware or similar +known-good implementation to test against. GCC is in the process of +dropping their support for iwMMXt codegen. These CPU types are +therefore deprecated in QEMU, and will be removed in a future release. + System emulator CPUs -------------------- |