On Fri, 29 Jan 2021 15:34:29 +0100 Pierre Morel <pmorel@xxxxxxxxxxxxx> wrote: > Measurement block format 1 is made available by the extended > mesurement block facility and is indicated in the SCHIB by > the bit in the PMCW. > > The MBO is specified in the SCHIB of each channel and the MBO > defined by the SCHM instruction is ignored. > > The test of the MB format 1 is just skip if the feature is s/skip/skipped/ > not available. > > Signed-off-by: Pierre Morel <pmorel@xxxxxxxxxxxxx> > --- > s390x/css.c | 51 +++++++++++++++++++++++++++++++++++++++++++++++++++ > 1 file changed, 51 insertions(+) > (...) > @@ -208,6 +251,14 @@ static void test_schm(void) > schm(mb0, SCHM_MBU); > test_schm_fmt0(mb0); > > + mb1 = alloc_io_mem(sizeof(struct measurement_block_format1), 0); > + if (!mb1) { I'm wondering whether you should move this into the format 1 invocation, so you won't try to allocate memory if format 1 is not even supported. > + report(0, "mesurement_block_format0 allocation"); In any case, s/mesurement_block_format0/measurement_block_format1/ :) > + goto end_free; > + } > + test_schm_fmt1(mb1); > + > + free_io_mem(mb1, sizeof(struct measurement_block_format1)); > end_free: > free_io_mem(mb0, sizeof(struct measurement_block_format0)); > }