hw/s390x: Introduce s390_skeys_get|set() helpers

s390_skeys_set() dispatch to S390SKeysClass::set_skeys(),
and s390_skeys_get() to S390SKeysClass::get_skeys().

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20240613104415.9643-2-philmd@linaro.org>

hw/s390x/s390-skeys.c

@@ -23,6 +23,7 @@
 #include "sysemu/kvm.h"
 #include "migration/qemu-file-types.h"
 #include "migration/register.h"
+#include "trace.h"
 
 #define S390_SKEYS_BUFFER_SIZE (128 * KiB)  /* Room for 128k storage keys */
 #define S390_SKEYS_SAVE_FLAG_EOS 0x01
@@ -54,6 +55,32 @@ void s390_skeys_init(void)
     qdev_realize(DEVICE(obj), NULL, &error_fatal);
 }
 
+int s390_skeys_get(S390SKeysState *ks, uint64_t start_gfn,
+                   uint64_t count, uint8_t *keys)
+{
+    S390SKeysClass *kc = S390_SKEYS_GET_CLASS(ks);
+    int rc;
+
+    rc = kc->get_skeys(ks, start_gfn, count, keys);
+    if (rc) {
+        trace_s390_skeys_get_nonzero(rc);
+    }
+    return rc;
+}
+
+int s390_skeys_set(S390SKeysState *ks, uint64_t start_gfn,
+                   uint64_t count, uint8_t *keys)
+{
+    S390SKeysClass *kc = S390_SKEYS_GET_CLASS(ks);
+    int rc;
+
+    rc = kc->set_skeys(ks, start_gfn, count, keys);
+    if (rc) {
+        trace_s390_skeys_set_nonzero(rc);
+    }
+    return rc;
+}
+
 static void write_keys(FILE *f, uint8_t *keys, uint64_t startgfn,
                        uint64_t count, Error **errp)
 {

hw/s390x/trace-events

@@ -36,3 +36,7 @@ s390_pci_unknown(const char *msg, uint32_t cmd) "%s unknown command 0x%x"
 s390_pci_bar(uint32_t bar, uint32_t addr, uint64_t size, uint32_t barsize) "bar %d addr 0x%x size 0x%" PRIx64 "barsize 0x%x"
 s390_pci_nodev(const char *cmd, uint32_t fh) "%s no pci dev fh 0x%x"
 s390_pci_invalid(const char *cmd, uint32_t fh) "%s invalid space fh 0x%x"
+
+# s390-skeys.c
+s390_skeys_get_nonzero(int rc) "SKEY: Call to get_skeys unexpectedly returned %d"
+s390_skeys_set_nonzero(int rc) "SKEY: Call to set_skeys unexpectedly returned %d"

include/hw/s390x/storage-keys.h

@@ -111,6 +111,16 @@ struct QEMUS390SKeysState {
 };
 
 void s390_skeys_init(void);
+/**
+ * @s390_skeys_get: See S390SKeysClass::get_skeys()
+ */
+int s390_skeys_get(S390SKeysState *ks, uint64_t start_gfn,
+                   uint64_t count, uint8_t *keys);
+/**
+ * @s390_skeys_set: See S390SKeysClass::set_skeys()
+ */
+int s390_skeys_set(S390SKeysState *ks, uint64_t start_gfn,
+                   uint64_t count, uint8_t *keys);
 
 S390SKeysState *s390_get_skeys_device(void);