This is test assumes that shared static/global variables are coherent
between the CPUs. That's true on incoherent platforms only when
CONFIG_KERNEL_COHERENCE=y. Normally that gets turned on along with
SMP, but this is using the lower level mp API directly and didn't have
that.
Signed-off-by: Andy Ross <andrew.j.ross@intel.com>
This was a very early test and got bitrotten inside a esp32-only
whitelist. Make it run generically.
SMP must be forced off by the test (it's commonly a platform default).
Add a build-time failure when the configuration is single-CPU, for
clarity.
Filter the test likewise so it runs on all supported systems.
Also, the key argument to the CPU startup function is vestigial and
the test was being too strict by requiring it to be non-zero.
Finally, the qemu command line needs to predicate the "-smp" argument
on CONFIG_MP_NUM_CPUS and not just CONFIG_SMP so we have an extra CPU
to test against.
Signed-off-by: Andy Ross <andrew.j.ross@intel.com>
