On 2/9/22 12:37, Nico Boehr wrote:
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.
Which second operand?
- 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?
--
Pierre Morel
IBM Lab Boeblingen
