Merge remote-tracking branch 'remotes/cohuck/tags/s390x-20180702' into staging

s390x updates:
- add bpb/ppa15 features to default cpu model for z196 and later
- rework TOD handling and fix cpu hotplug under tcg
- various fixes

# gpg: Signature made Mon 02 Jul 2018 12:09:40 BST
# gpg:                using RSA key DECF6B93C6F02FAF
# gpg: Good signature from "Cornelia Huck <conny@cornelia-huck.de>"
# gpg:                 aka "Cornelia Huck <huckc@linux.vnet.ibm.com>"
# gpg:                 aka "Cornelia Huck <cornelia.huck@de.ibm.com>"
# gpg:                 aka "Cornelia Huck <cohuck@kernel.org>"
# gpg:                 aka "Cornelia Huck <cohuck@redhat.com>"
# Primary key fingerprint: C3D0 D66D C362 4FF6 A8C0  18CE DECF 6B93 C6F0 2FAF

* remotes/cohuck/tags/s390x-20180702:
  s390x/tcg: fix locking problem with tcg_s390_tod_updated
  s390x/kvm: indicate alignment in legacy_s390_alloc()
  s390x/kvm: legacy_s390_alloc() only supports one allocation
  s390x/tcg: fix CPU hotplug with single-threaded TCG
  s390x/tcg: rearm the CKC timer during migration
  s390x/tcg: implement SET CLOCK
  s390x/tcg: SET CLOCK COMPARATOR can clear CKC interrupts
  s390x/tcg: properly implement the TOD
  s390x/tcg: drop tod_basetime
  s390x/tod: factor out TOD into separate device
  s390x/kvm: pass values instead of pointers to kvm_s390_set_clock_*()
  s390x/tcg: avoid overflows in time2tod/tod2time
  s390x/cpumodel: default enable bpb and ppa15 for z196 and later
  loader: Check access size when calling rom_ptr() to avoid crashes
  s390/ipl: fix ipl with -no-reboot

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

3 files changed, 70 insertions, 1 deletions

diff --git a/include/hw/loader.h b/include/hw/loader.h
index 5ed3fd8..e98b84b 100644
--- a/include/hw/loader.h
+++ b/include/hw/loader.h
@@ -226,7 +226,7 @@ void rom_set_fw(FWCfgState *f);
 void rom_set_order_override(int order);
 void rom_reset_order_override(void);
 int rom_copy(uint8_t *dest, hwaddr addr, size_t size);
-void *rom_ptr(hwaddr addr);
+void *rom_ptr(hwaddr addr, size_t size);
 void hmp_info_roms(Monitor *mon, const QDict *qdict);
 
 #define rom_add_file_fixed(_f, _a, _i)          \
diff --git a/include/hw/s390x/tod.h b/include/hw/s390x/tod.h
new file mode 100644
index 0000000..413c0d7
--- /dev/null
+++ b/include/hw/s390x/tod.h
@@ -0,0 +1,65 @@
+/*
+ * TOD (Time Of Day) clock
+ *
+ * Copyright 2018 Red Hat, Inc.
+ * Author(s): David Hildenbrand <david@redhat.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+
+#ifndef HW_S390_TOD_H
+#define HW_S390_TOD_H
+
+#include "hw/qdev.h"
+
+typedef struct S390TOD {
+    uint8_t high;
+    uint64_t low;
+} S390TOD;
+
+#define TYPE_S390_TOD "s390-tod"
+#define S390_TOD(obj) OBJECT_CHECK(S390TODState, (obj), TYPE_S390_TOD)
+#define S390_TOD_CLASS(oc) OBJECT_CLASS_CHECK(S390TODClass, (oc), \
+                                              TYPE_S390_TOD)
+#define S390_TOD_GET_CLASS(obj) OBJECT_GET_CLASS(S390TODClass, (obj), \
+                                                 TYPE_S390_TOD)
+#define TYPE_KVM_S390_TOD TYPE_S390_TOD "-kvm"
+#define TYPE_QEMU_S390_TOD TYPE_S390_TOD "-qemu"
+
+typedef struct S390TODState {
+    /* private */
+    DeviceState parent_obj;
+
+    /* unused by KVM implementation */
+    S390TOD base;
+} S390TODState;
+
+typedef struct S390TODClass {
+    /* private */
+    DeviceClass parent_class;
+
+    /* public */
+    void (*get)(const S390TODState *td, S390TOD *tod, Error **errp);
+    void (*set)(S390TODState *td, const S390TOD *tod, Error **errp);
+} S390TODClass;
+
+/* The value of the TOD clock for 1.1.1970. */
+#define TOD_UNIX_EPOCH 0x7d91048bca000000ULL
+
+/* Converts ns to s390's clock format */
+static inline uint64_t time2tod(uint64_t ns)
+{
+    return (ns << 9) / 125 + (((ns & 0xff10000000000000ull) / 125) << 9);
+}
+
+/* Converts s390's clock format to ns */
+static inline uint64_t tod2time(uint64_t t)
+{
+    return ((t >> 9) * 125) + (((t & 0x1ff) * 125) >> 9);
+}
+
+void s390_init_tod(void);
+S390TODState *s390_get_todstate(void);
+
+#endif
diff --git a/include/sysemu/sysemu.h b/include/sysemu/sysemu.h
index b921c6f..76ef619 100644
--- a/include/sysemu/sysemu.h
+++ b/include/sysemu/sysemu.h
@@ -44,6 +44,10 @@ typedef enum ShutdownCause {
                                      turns that into a shutdown */
     SHUTDOWN_CAUSE_GUEST_PANIC,   /* Guest panicked, and command line turns
                                      that into a shutdown */
+    SHUTDOWN_CAUSE_SUBSYSTEM_RESET,/* Partial guest reset that does not trigger
+                                      QMP events and ignores --no-reboot. This
+                                      is useful for sanitize hypercalls on s390
+                                      that are used during kexec/kdump/boot */
     SHUTDOWN_CAUSE__MAX,
 } ShutdownCause;