s390x: smp: Test all CRs on initial reset
All CRs are set to 0 and CRs 0 and 14 are set to pre-defined values,
so we also need to test 1-13 and 15 for 0.
And while we're at it, let's also set some values to cr 1, 7 and 13, so
we can actually be sure that they will be zeroed.
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Message-Id: <20200424093356.11931-1-frankja@linux.ibm.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
diff --git a/s390x/smp.c b/s390x/smp.c
index 1641979..08fa770 100644
--- a/s390x/smp.c
+++ b/s390x/smp.c
@@ -195,16 +195,28 @@
report_prefix_pop();
}
+/* Used to dirty registers of cpu #1 before it is reset */
+static void test_func_initial(void)
+{
+ lctlg(1, 0x42000UL);
+ lctlg(7, 0x43000UL);
+ lctlg(13, 0x44000UL);
+ set_flag(1);
+}
+
static void test_reset_initial(void)
{
struct cpu_status *status = alloc_pages(0);
struct psw psw;
+ int i;
psw.mask = extract_psw_mask();
- psw.addr = (unsigned long)test_func;
+ psw.addr = (unsigned long)test_func_initial;
report_prefix_push("reset initial");
+ set_flag(0);
smp_cpu_start(1, psw);
+ wait_for_flag();
sigp_retry(1, SIGP_INITIAL_CPU_RESET, 0, NULL);
sigp(1, SIGP_STORE_STATUS_AT_ADDRESS, (uintptr_t)status, NULL);
@@ -215,6 +227,10 @@
report(!status->fpc, "fpc");
report(!status->cputm, "cpu timer");
report(!status->todpr, "todpr");
+ for (i = 1; i <= 13; i++) {
+ report(status->crs[i] == 0, "cr%d == 0", i);
+ }
+ report(status->crs[15] == 0, "cr15 == 0");
report_prefix_pop();
report_prefix_push("initialized");
