Rather than asserting, we can return a value that's designated as a
programming only value to indicate that there has been no validity.
The SIE instruction will never write 0xffff as a validity code so
let's just use that constant.
Signed-off-by: Janosch Frank <frankja@xxxxxxxxxxxxx>
---
lib/s390x/sie.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/lib/s390x/sie.c b/lib/s390x/sie.c
index 9241b4b4..b44febde 100644
--- a/lib/s390x/sie.c
+++ b/lib/s390x/sie.c
@@ -23,7 +23,13 @@ void sie_expect_validity(struct vm *vm)
uint16_t sie_get_validity(struct vm *vm)
{
- assert(vm->sblk->icptcode == ICPT_VALIDITY);
+ /*
+ * 0xffff will never be returned by SIE, so we can indicate a
+ * missing validity via this value.
+ */
+ if (vm->sblk->icptcode != ICPT_VALIDITY)
+ return 0xffff;
+
return vm->sblk->ipb >> 16;
}
--
2.34.1
