diff mbox series

[Stable-8.0.4,09/31] target/s390x: Fix LRA overwriting the top 32 bits on DAT error

Message ID 20230725134517.3370706-9-mjt@tls.msk.ru
State New
Headers show
Series Patch Round-up for stable 8.0.4, freeze on 2023-08-05 | expand

Commit Message

Michael Tokarev July 25, 2023, 1:44 p.m. UTC 
From: Ilya Leoshkevich <iii@linux.ibm.com>

When a DAT error occurs, LRA is supposed to write the error information
to the bottom 32 bits of R1, and leave the top 32 bits of R1 alone.

Fix by passing the original value of R1 into helper and copying the
top 32 bits to the return value.

Fixes: d8fe4a9c284f ("target-s390: Convert LRA")
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Cc: qemu-stable@nongnu.org
Message-Id: <20230704081506.276055-6-iii@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
(cherry picked from commit 6da311a60d58dba27f5f790217d5ebba944e34ab)
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
diff mbox series

Patch

diff --git a/target/s390x/helper.h b/target/s390x/helper.h
index f629f0fbcf..5038cfe851 100644
--- a/target/s390x/helper.h
+++ b/target/s390x/helper.h
@@ -359,7 +359,7 @@  DEF_HELPER_FLAGS_4(idte, TCG_CALL_NO_RWG, void, env, i64, i64, i32)
 DEF_HELPER_FLAGS_4(ipte, TCG_CALL_NO_RWG, void, env, i64, i64, i32)
 DEF_HELPER_FLAGS_1(ptlb, TCG_CALL_NO_RWG, void, env)
 DEF_HELPER_FLAGS_1(purge, TCG_CALL_NO_RWG, void, env)
-DEF_HELPER_2(lra, i64, env, i64)
+DEF_HELPER_3(lra, i64, env, i64, i64)
 DEF_HELPER_1(per_check_exception, void, env)
 DEF_HELPER_FLAGS_3(per_branch, TCG_CALL_NO_RWG, void, env, i64, i64)
 DEF_HELPER_FLAGS_2(per_ifetch, TCG_CALL_NO_RWG, void, env, i64)
diff --git a/target/s390x/tcg/mem_helper.c b/target/s390x/tcg/mem_helper.c
index 7141d0ad88..51894f17f5 100644
--- a/target/s390x/tcg/mem_helper.c
+++ b/target/s390x/tcg/mem_helper.c
@@ -2374,7 +2374,7 @@  void HELPER(purge)(CPUS390XState *env)
 }
 
 /* load real address */
-uint64_t HELPER(lra)(CPUS390XState *env, uint64_t addr)
+uint64_t HELPER(lra)(CPUS390XState *env, uint64_t r1, uint64_t addr)
 {
     uint64_t asc = env->psw.mask & PSW_MASK_ASC;
     uint64_t ret, tec;
@@ -2388,7 +2388,7 @@  uint64_t HELPER(lra)(CPUS390XState *env, uint64_t addr)
     exc = mmu_translate(env, addr, MMU_S390_LRA, asc, &ret, &flags, &tec);
     if (exc) {
         cc = 3;
-        ret = exc | 0x80000000;
+        ret = (r1 & 0xFFFFFFFF00000000ULL) | exc | 0x80000000;
     } else {
         cc = 0;
         ret |= addr & ~TARGET_PAGE_MASK;
diff --git a/target/s390x/tcg/translate.c b/target/s390x/tcg/translate.c
index 0c22d2f17f..c7498ff3f2 100644
--- a/target/s390x/tcg/translate.c
+++ b/target/s390x/tcg/translate.c
@@ -2941,7 +2941,7 @@  static DisasJumpType op_lctlg(DisasContext *s, DisasOps *o)
 
 static DisasJumpType op_lra(DisasContext *s, DisasOps *o)
 {
-    gen_helper_lra(o->out, cpu_env, o->in2);
+    gen_helper_lra(o->out, cpu_env, o->out, o->in2);
     set_cc_static(s);
     return DISAS_NEXT;
 }