target/s390x: Move diag helpers to a separate file

misc_helper.c won't be compiled with --disable-tcg anymore, but we
still need the diag helpers in KVM builds, too, so move the helper
functions to a separate file.

Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-Id: <1500886370-14572-3-git-send-email-thuth@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>

1 files changed, 179 insertions, 0 deletions

diff --git a/target/s390x/diag.c b/target/s390x/diag.c
new file mode 100644
index 0000000000..10ac845bcd
--- /dev/null
+++ b/target/s390x/diag.c
@@ -0,0 +1,179 @@
+/*
+ * S390x DIAG instruction helper functions
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include "qemu/osdep.h"
+#include "cpu.h"
+#include "exec/address-spaces.h"
+#include "exec/exec-all.h"
+#include "hw/watchdog/wdt_diag288.h"
+#include "sysemu/cpus.h"
+#include "hw/s390x/ipl.h"
+
+static int modified_clear_reset(S390CPU *cpu)
+{
+    S390CPUClass *scc = S390_CPU_GET_CLASS(cpu);
+    CPUState *t;
+
+    pause_all_vcpus();
+    cpu_synchronize_all_states();
+    CPU_FOREACH(t) {
+        run_on_cpu(t, s390_do_cpu_full_reset, RUN_ON_CPU_NULL);
+    }
+    s390_cmma_reset();
+    subsystem_reset();
+    s390_crypto_reset();
+    scc->load_normal(CPU(cpu));
+    cpu_synchronize_all_post_reset();
+    resume_all_vcpus();
+    return 0;
+}
+
+static int load_normal_reset(S390CPU *cpu)
+{
+    S390CPUClass *scc = S390_CPU_GET_CLASS(cpu);
+    CPUState *t;
+
+    pause_all_vcpus();
+    cpu_synchronize_all_states();
+    CPU_FOREACH(t) {
+        run_on_cpu(t, s390_do_cpu_reset, RUN_ON_CPU_NULL);
+    }
+    s390_cmma_reset();
+    subsystem_reset();
+    scc->initial_cpu_reset(CPU(cpu));
+    scc->load_normal(CPU(cpu));
+    cpu_synchronize_all_post_reset();
+    resume_all_vcpus();
+    return 0;
+}
+
+int handle_diag_288(CPUS390XState *env, uint64_t r1, uint64_t r3)
+{
+    uint64_t func = env->regs[r1];
+    uint64_t timeout = env->regs[r1 + 1];
+    uint64_t action = env->regs[r3];
+    Object *obj;
+    DIAG288State *diag288;
+    DIAG288Class *diag288_class;
+
+    if (r1 % 2 || action != 0) {
+        return -1;
+    }
+
+    /* Timeout must be more than 15 seconds except for timer deletion */
+    if (func != WDT_DIAG288_CANCEL && timeout < 15) {
+        return -1;
+    }
+
+    obj = object_resolve_path_type("", TYPE_WDT_DIAG288, NULL);
+    if (!obj) {
+        return -1;
+    }
+
+    diag288 = DIAG288(obj);
+    diag288_class = DIAG288_GET_CLASS(diag288);
+    return diag288_class->handle_timer(diag288, func, timeout);
+}
+
+#define DIAG_308_RC_OK              0x0001
+#define DIAG_308_RC_NO_CONF         0x0102
+#define DIAG_308_RC_INVALID         0x0402
+
+void handle_diag_308(CPUS390XState *env, uint64_t r1, uint64_t r3)
+{
+    uint64_t addr =  env->regs[r1];
+    uint64_t subcode = env->regs[r3];
+    IplParameterBlock *iplb;
+
+    if (env->psw.mask & PSW_MASK_PSTATE) {
+        program_interrupt(env, PGM_PRIVILEGED, ILEN_AUTO);
+        return;
+    }
+
+    if ((subcode & ~0x0ffffULL) || (subcode > 6)) {
+        program_interrupt(env, PGM_SPECIFICATION, ILEN_AUTO);
+        return;
+    }
+
+    switch (subcode) {
+    case 0:
+        modified_clear_reset(s390_env_get_cpu(env));
+        if (tcg_enabled()) {
+            cpu_loop_exit(CPU(s390_env_get_cpu(env)));
+        }
+        break;
+    case 1:
+        load_normal_reset(s390_env_get_cpu(env));
+        if (tcg_enabled()) {
+            cpu_loop_exit(CPU(s390_env_get_cpu(env)));
+        }
+        break;
+    case 3:
+        s390_reipl_request();
+        if (tcg_enabled()) {
+            cpu_loop_exit(CPU(s390_env_get_cpu(env)));
+        }
+        break;
+    case 5:
+        if ((r1 & 1) || (addr & 0x0fffULL)) {
+            program_interrupt(env, PGM_SPECIFICATION, ILEN_AUTO);
+            return;
+        }
+        if (!address_space_access_valid(&address_space_memory, addr,
+                                        sizeof(IplParameterBlock), false)) {
+            program_interrupt(env, PGM_ADDRESSING, ILEN_AUTO);
+            return;
+        }
+        iplb = g_malloc0(sizeof(IplParameterBlock));
+        cpu_physical_memory_read(addr, iplb, sizeof(iplb->len));
+        if (!iplb_valid_len(iplb)) {
+            env->regs[r1 + 1] = DIAG_308_RC_INVALID;
+            goto out;
+        }
+
+        cpu_physical_memory_read(addr, iplb, be32_to_cpu(iplb->len));
+
+        if (!iplb_valid_ccw(iplb) && !iplb_valid_fcp(iplb)) {
+            env->regs[r1 + 1] = DIAG_308_RC_INVALID;
+            goto out;
+        }
+
+        s390_ipl_update_diag308(iplb);
+        env->regs[r1 + 1] = DIAG_308_RC_OK;
+out:
+        g_free(iplb);
+        return;
+    case 6:
+        if ((r1 & 1) || (addr & 0x0fffULL)) {
+            program_interrupt(env, PGM_SPECIFICATION, ILEN_AUTO);
+            return;
+        }
+        if (!address_space_access_valid(&address_space_memory, addr,
+                                        sizeof(IplParameterBlock), true)) {
+            program_interrupt(env, PGM_ADDRESSING, ILEN_AUTO);
+            return;
+        }
+        iplb = s390_ipl_get_iplb();
+        if (iplb) {
+            cpu_physical_memory_write(addr, iplb, be32_to_cpu(iplb->len));
+            env->regs[r1 + 1] = DIAG_308_RC_OK;
+        } else {
+            env->regs[r1 + 1] = DIAG_308_RC_NO_CONF;
+        }
+        return;
+    default:
+        hw_error("Unhandled diag308 subcode %" PRIx64, subcode);
+        break;
+    }
+}