diff mbox series

[v3,05/14] target/s390x: Make MC raise specification exception when class >= 16

Message ID 20230719221310.1968845-6-iii@linux.ibm.com
State New
Headers show
Series target/s390x: Miscellaneous TCG fixes, part 2 | expand

Commit Message

Ilya Leoshkevich July 19, 2023, 10:11 p.m. UTC 
MC requires bit positions 8-11 (upper 4 bits of class) to be zeros,
otherwise it must raise a specification exception.

Cc: qemu-stable@nongnu.org
Fixes: 20d143e2cab8 ("s390x/tcg: Implement MONITOR CALL")
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
---
 target/s390x/tcg/excp_helper.c | 2 +-
 target/s390x/tcg/translate.c   | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

Comments

Richard Henderson July 23, 2023, 4:33 p.m. UTC | #1 
On 7/19/23 23:11, Ilya Leoshkevich wrote:
> MC requires bit positions 8-11 (upper 4 bits of class) to be zeros,
> otherwise it must raise a specification exception.
> 
> Cc:qemu-stable@nongnu.org
> Fixes: 20d143e2cab8 ("s390x/tcg: Implement MONITOR CALL")
> Reviewed-by: David Hildenbrand<david@redhat.com>
> Signed-off-by: Ilya Leoshkevich<iii@linux.ibm.com>
> ---
>   target/s390x/tcg/excp_helper.c | 2 +-
>   target/s390x/tcg/translate.c   | 4 ++--
>   2 files changed, 3 insertions(+), 3 deletions(-)

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

r~
diff mbox series

Patch

diff --git a/target/s390x/tcg/excp_helper.c b/target/s390x/tcg/excp_helper.c
index 228aa9f2373..3da337f7c72 100644
--- a/target/s390x/tcg/excp_helper.c
+++ b/target/s390x/tcg/excp_helper.c
@@ -639,7 +639,7 @@  void monitor_event(CPUS390XState *env,
 void HELPER(monitor_call)(CPUS390XState *env, uint64_t monitor_code,
                           uint32_t monitor_class)
 {
-    g_assert(monitor_class <= 0xff);
+    g_assert(monitor_class <= 0xf);
 
     if (env->cregs[8] & (0x8000 >> monitor_class)) {
         monitor_event(env, monitor_code, monitor_class, GETPC());
diff --git a/target/s390x/tcg/translate.c b/target/s390x/tcg/translate.c
index 2f193339709..9a4fd3d8911 100644
--- a/target/s390x/tcg/translate.c
+++ b/target/s390x/tcg/translate.c
@@ -3184,9 +3184,9 @@  static DisasJumpType op_lcbb(DisasContext *s, DisasOps *o)
 
 static DisasJumpType op_mc(DisasContext *s, DisasOps *o)
 {
-    const uint16_t monitor_class = get_field(s, i2);
+    const uint8_t monitor_class = get_field(s, i2);
 
-    if (monitor_class & 0xff00) {
+    if (monitor_class & 0xf0) {
         gen_program_exception(s, PGM_SPECIFICATION);
         return DISAS_NORETURN;
     }