[kvm-unit-tests PATCH 8/9] s390x: Add sthyi cc==0 r2+1 verification

Janosch Frank
2021-09-22T07:19:38Z

On success r2 + 1 should be 0, let's also check for that.

Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
---
s390x/sthyi.c | 20 +++++++++++---------
1 file changed, 11 insertions(+), 9 deletions(-)

diff --git a/s390x/sthyi.c b/s390x/sthyi.c
index db90b56f..4b153bf4 100644
--- a/s390x/sthyi.c
+++ b/s390x/sthyi.c
@@ -24,16 +24,16 @@ static inline int sthyi(uint64_t vaddr, uint64_t fcode, uint64_t *rc,
{
register uint64_t code asm("0") = fcode;
register uint64_t addr asm("2") = vaddr;
- register uint64_t rc3 asm("3") = 0;
+ register uint64_t rc3 asm("3") = 42;
int cc = 0;

- asm volatile(".insn rre,0xB2560000,%[r1],%[r2]\n"
- "ipm %[cc]\n"
- "srl %[cc],28\n"
- : [cc] "=d" (cc)
- : [code] "d" (code), [addr] "a" (addr), [r1] "i" (r1),
- [r2] "i" (r2)
- : "memory", "cc", "r3");
+ asm volatile(
+ ".insn rre,0xB2560000,%[r1],%[r2]\n"
+ "ipm %[cc]\n"
+ "srl %[cc],28\n"
+ : [cc] "=d" (cc), "+d" (rc3)
+ : [code] "d" (code), [addr] "a" (addr), [r1] "i" (r1), [r2] "i" (r2)
+ : "memory", "cc");
if (rc)
*rc = rc3;
return cc;
@@ -139,16 +139,18 @@ static void test_fcode0(void)
struct sthyi_hdr_sctn *hdr;
struct sthyi_mach_sctn *mach;
struct sthyi_par_sctn *par;
+ uint64_t rc = 42;

/* Zero destination memory. */
memset(pagebuf, 0, PAGE_SIZE);

report_prefix_push("fcode 0");
- sthyi((uint64_t)pagebuf, 0, NULL, 0, 2);
+ sthyi((uint64_t)pagebuf, 0, &rc, 0, 2);
hdr = (void *)pagebuf;
mach = (void *)pagebuf + hdr->INFMOFF;
par = (void *)pagebuf + hdr->INFPOFF;

+ report(!rc, "r2 + 1 == 0");
test_fcode0_hdr(hdr);
test_fcode0_mach(mach);
test_fcode0_par(par);
--
2.30.2