On 08/04/2025 17.55, Zhuoying Cai wrote:
From: Collin Walling <wall...@linux.ibm.com>
...
Signed-off-by: Zhuoying Cai <zy...@linux.ibm.com>
So the patch is from Collin, but S-o-b only by you? Looks weird, this should
either have an additional S-o-b by Collin, too, or not have that "From:"
line at all?
...
diff --git a/include/hw/s390x/ipl/diag320.h b/include/hw/s390x/ipl/diag320.h
new file mode 100644
index 0000000000..d6f70c65df
--- /dev/null
+++ b/include/hw/s390x/ipl/diag320.h
@@ -0,0 +1,19 @@
+/*
+ * S/390 DIAGNOSE 320 definitions and structures
+ *
+ * Copyright 2025 IBM Corp.
+ * Author(s): Zhuoying Cai <zy...@linux.ibm.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or (at
+ * your option) any later version. See the COPYING file in the top-level
+ * directory.
By the way, new files need a SPDX-License-Identifier nowadays to make
scripts/checkpatch.pl happy.
+ */
+
+#ifndef S390X_DIAG320_H
+#define S390X_DIAG320_H
+
+#define DIAG_320_SUBC_QUERY_ISM 0
+
+#define DIAG_320_RC_OK 0x0001
+
+#endif
diff --git a/target/s390x/diag.c b/target/s390x/diag.c
index da44b0133e..cb840e4b97 100644
--- a/target/s390x/diag.c
+++ b/target/s390x/diag.c
@@ -192,3 +192,39 @@ out:
break;
}
}
+
+void handle_diag_320(CPUS390XState *env, uint64_t r1, uint64_t r3, uintptr_t
ra)
+{
+ S390CPU *cpu = env_archcpu(env);
+ uint64_t subcode = env->regs[r3];
+ uint64_t addr = env->regs[r1];
+ int rc;
Do we also need a s390_has_feat(S390_FEAT_DIAG_320) check here?
+ if (env->psw.mask & PSW_MASK_PSTATE) {
+ s390_program_interrupt(env, PGM_PRIVILEGED, ra);
+ return;
+ }
+
+ if (r1 & 1) {
+ s390_program_interrupt(env, PGM_SPECIFICATION, ra);
+ return;
+ }
+
+ switch (subcode) {
+ case DIAG_320_SUBC_QUERY_ISM:
+ uint64_t ism = 0;
+
+ if (s390_cpu_virt_mem_write(cpu, addr, (uint8_t)r1, &ism,
I think you could drop the (uint8_t) here?
+ be64_to_cpu(sizeof(ism)))) {
be64_to_cpu() looks very wrong here!
Thomas
