On 1/23/25 04:37, Ilya Leoshkevich wrote:
Executing PERFORM RANDOM NUMBER OPERATION makes QEMU exit with "Bad
icount read" when using record/replay. This is caused by
icount_get_raw_locked() if the current instruction is not the last one
in the respective translation block.

For the x86_64's rdrand this is resolved by calling
translator_io_start(). On s390x one uses IF_IO in order to make this
call happen automatically.

Signed-off-by: Ilya Leoshkevich <i...@linux.ibm.com>
---
  target/s390x/tcg/insn-data.h.inc | 2 +-
  1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/target/s390x/tcg/insn-data.h.inc b/target/s390x/tcg/insn-data.h.inc
index e7d61cdec28..ec730ee0919 100644
--- a/target/s390x/tcg/insn-data.h.inc
+++ b/target/s390x/tcg/insn-data.h.inc
@@ -1012,7 +1012,7 @@
      D(0xb92e, KM,      RRE,   MSA,  0, 0, 0, 0, msa, 0, S390_FEAT_TYPE_KM)
      D(0xb92f, KMC,     RRE,   MSA,  0, 0, 0, 0, msa, 0, S390_FEAT_TYPE_KMC)
      D(0xb929, KMA,     RRF_b, MSA8, 0, 0, 0, 0, msa, 0, S390_FEAT_TYPE_KMA)
-    D(0xb93c, PPNO,    RRE,   MSA5, 0, 0, 0, 0, msa, 0, S390_FEAT_TYPE_PPNO)
+    E(0xb93c, PPNO,    RRE,   MSA5, 0, 0, 0, 0, msa, 0, S390_FEAT_TYPE_PPNO, 
IF_IO)
      D(0xb93e, KIMD,    RRE,   MSA,  0, 0, 0, 0, msa, 0, S390_FEAT_TYPE_KIMD)
      D(0xb93f, KLMD,    RRE,   MSA,  0, 0, 0, 0, msa, 0, S390_FEAT_TYPE_KLMD)

Reviewed-by: Richard Henderson <richard.hender...@linaro.org>

r~

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