On Tue, 2022-02-08 at 14:27 +0100, Pierre Morel wrote:
> We check the PTF instruction.
You could test some very basic things as well:
- you get a privileged pgm int in problem state,
- reserved bits in first operand cause specification pgm int,
- reserved FC values result in a specification pgm int,
- second operand is ignored.
>
> - We do not expect to support vertical polarization.
>
> - We do not expect the Modified Topology Change Report to be
[...]
Forgive me if I'm missing something, but why _Modified_ Topology Change
Report?
> diff --git a/s390x/topology.c b/s390x/topology.c
> new file mode 100644
> index 00000000..a1f9ce51
> --- /dev/null
> +++ b/s390x/topology.c
[...]
> +static int ptf(unsigned long fc, unsigned long *rc)
> +{
> + int cc;
> +
> + asm volatile(
> + " .insn rre,0xb9a20000,%1,0\n"
> + " ipm %0\n"
> + " srl %0,28\n"
> + : "=d" (cc), "+d" (fc)
> + : "d" (fc)
Why list fc here again?
