[kvm-unit-tests PATCH v4] s390x: Add strict mode to specification exception interpretation test

Janis Schoetterl-Glausch
2022-08-25T11:21:04Z

While specification exception interpretation is not required to occur,
it can be useful for automatic regression testing to fail the test if it
does not occur.
Add a `--strict` argument to enable this.
`--strict` takes a list of machine types (as reported by STIDP)
for which to enable strict mode, for example
`--strict 3931,8562,8561,3907,3906,2965,2964`
will enable it for models z16 - z13.
Alternatively, strict mode can be enabled for all but the listed machine
types by prefixing the list with a `!`, for example
`--strict !1090,1091,2064,2066,2084,2086,2094,2096,2097,2098,2817,2818,2827,2828`
will enable it for z/Architecture models except those older than z13.
`--strict !` will enable it always.

Signed-off-by: Janis Schoetterl-Glausch <scgl@linux.ibm.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
---
v3 -> v4
* fix compiler warning due to format string (thanks Janosch)
see range diff below
* add R-b (thanks Thomas)

v2 -> v3
* rebase on master
* global strict bool
* fix style issue

Range-diff against v3:
1: 76199f42 ! 1: ef697f15 s390x: Add strict mode to specification exception interpretation test
@@ Commit message
`--strict !` will enable it always.

Signed-off-by: Janis Schoetterl-Glausch <scgl@linux.ibm.com>
+ Reviewed-by: Thomas Huth <thuth@redhat.com>

## s390x/spec_ex-sie.c ##
@@
@@ s390x/spec_ex-sie.c: static void test_spec_ex_sie(void)
- report_info("Interpreted initial exception, intercepted invalid program new PSW exception");
+ msg = "Interpreted initial exception, intercepted invalid program new PSW exception";
+ if (strict)
-+ report(vm.sblk->gpsw.addr == 0xdeadbeee, msg);
++ report(vm.sblk->gpsw.addr == 0xdeadbeee, "%s", msg);
+ else if (vm.sblk->gpsw.addr == 0xdeadbeee)
-+ report_info(msg);
++ report_info("%s", msg);
else
report_info("Did not interpret initial exception");
report_prefix_pop();

s390x/spec_ex-sie.c | 53 +++++++++++++++++++++++++++++++++++++++++++--
1 file changed, 51 insertions(+), 2 deletions(-)

diff --git a/s390x/spec_ex-sie.c b/s390x/spec_ex-sie.c
index d8e25e75..5fa135b8 100644
--- a/s390x/spec_ex-sie.c
+++ b/s390x/spec_ex-sie.c
@@ -7,16 +7,19 @@
* specification exception interpretation is off/on.
*/
#include <libcflat.h>
+#include <stdlib.h>
#include <sclp.h>
#include <asm/page.h>
#include <asm/arch_def.h>
#include <alloc_page.h>
#include <sie.h>
#include <snippet.h>
+#include <hardware.h>

static struct vm vm;
extern const char SNIPPET_NAME_START(c, spec_ex)[];
extern const char SNIPPET_NAME_END(c, spec_ex)[];
+static bool strict;

static void setup_guest(void)
{
@@ -37,6 +40,8 @@ static void reset_guest(void)

static void test_spec_ex_sie(void)
{
+ const char *msg;
+
setup_guest();

report_prefix_push("SIE spec ex interpretation");
@@ -60,16 +65,60 @@ static void test_spec_ex_sie(void)
report(vm.sblk->icptcode == ICPT_PROGI
&& vm.sblk->iprcc == PGM_INT_CODE_SPECIFICATION,
"Received specification exception intercept");
- if (vm.sblk->gpsw.addr == 0xdeadbeee)
- report_info("Interpreted initial exception, intercepted invalid program new PSW exception");
+ msg = "Interpreted initial exception, intercepted invalid program new PSW exception";
+ if (strict)
+ report(vm.sblk->gpsw.addr == 0xdeadbeee, "%s", msg);
+ else if (vm.sblk->gpsw.addr == 0xdeadbeee)
+ report_info("%s", msg);
else
report_info("Did not interpret initial exception");
report_prefix_pop();
report_prefix_pop();
}

+static bool parse_strict(int argc, char **argv)
+{
+ uint16_t machine_id;
+ char *list;
+ bool ret;
+
+ if (argc < 1)
+ return false;
+ if (strcmp("--strict", argv[0]))
+ return false;
+
+ machine_id = get_machine_id();
+ if (argc < 2) {
+ printf("No argument to --strict, ignoring\n");
+ return false;
+ }
+ list = argv[1];
+ if (list[0] == '!') {
+ ret = true;
+ list++;
+ } else {
+ ret = false;
+ }
+ while (true) {
+ long input = 0;
+
+ if (strlen(list) == 0)
+ return ret;
+ input = strtol(list, &list, 16);
+ if (*list == ',')
+ list++;
+ else if (*list != '\0')
+ break;
+ if (input == machine_id)
+ return !ret;
+ }
+ printf("Invalid --strict argument \"%s\", ignoring\n", list);
+ return ret;
+}
+
int main(int argc, char **argv)
{
+ strict = parse_strict(argc - 1, argv + 1);
if (!sclp_facilities.has_sief2) {
report_skip("SIEF2 facility unavailable");
goto out;

base-commit: ca85dda2671e88d34acfbca6de48a9ab32b1810d
--
2.36.1