Merge remote-tracking branch 'remotes/mst/tags/for_upstream' into staging

pc,vhost,virtio fixes, enhancements

virtio bi-endian support
new command to resync RTC
misc bugfixes and cleanups

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

# gpg: Signature made Sun 29 Jun 2014 17:41:13 BST using RSA key ID D28D5469
# gpg: Good signature from "Michael S. Tsirkin <mst@kernel.org>"
# gpg:                 aka "Michael S. Tsirkin <mst@redhat.com>"

* remotes/mst/tags/for_upstream: (37 commits)
  tests: add human format test for string output visitor
  vhost-net: disable when cross-endian
  target-ppc: enable virtio endian ambivalent support
  virtio-9p: use virtio wrappers to access headers
  virtio-serial-bus: use virtio wrappers to access headers
  virtio-scsi: use virtio wrappers to access headers
  virtio-blk: use virtio wrappers to access headers
  virtio-balloon: use virtio wrappers to access page frame numbers
  virtio-net: use virtio wrappers to access headers
  virtio: allow byte swapping for vring
  virtio: memory accessors for endian-ambivalent targets
  virtio: add endian-ambivalent support to VirtIODevice
  cpu: introduce CPUClass::virtio_is_big_endian()
  exec: introduce target_words_bigendian() helper
  virtio: add subsections to the migration stream
  virtio-rng: implement per-device migration calls
  virtio-balloon: implement per-device migration calls
  virtio-serial: implement per-device migration calls
  virtio-blk: implement per-device migration calls
  virtio-net: implement per-device migration calls
  ...

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

2 files changed, 186 insertions, 1 deletions

diff --git a/include/hw/virtio/virtio-access.h b/include/hw/virtio/virtio-access.h
new file mode 100644
index 0000000000..46456fd9da
--- /dev/null
+++ b/include/hw/virtio/virtio-access.h
@@ -0,0 +1,170 @@
+/*
+ * Virtio Accessor Support: In case your target can change endian.
+ *
+ * Copyright IBM, Corp. 2013
+ *
+ * Authors:
+ *  Rusty Russell   <rusty@au.ibm.com>
+ *
+ * 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.
+ *
+ */
+#ifndef _QEMU_VIRTIO_ACCESS_H
+#define _QEMU_VIRTIO_ACCESS_H
+#include "hw/virtio/virtio.h"
+#include "exec/address-spaces.h"
+
+static inline bool virtio_access_is_big_endian(VirtIODevice *vdev)
+{
+#if defined(TARGET_IS_BIENDIAN)
+    return virtio_is_big_endian(vdev);
+#elif defined(TARGET_WORDS_BIGENDIAN)
+    return true;
+#else
+    return false;
+#endif
+}
+
+static inline uint16_t virtio_lduw_phys(VirtIODevice *vdev, hwaddr pa)
+{
+    if (virtio_access_is_big_endian(vdev)) {
+        return lduw_be_phys(&address_space_memory, pa);
+    }
+    return lduw_le_phys(&address_space_memory, pa);
+}
+
+static inline uint32_t virtio_ldl_phys(VirtIODevice *vdev, hwaddr pa)
+{
+    if (virtio_access_is_big_endian(vdev)) {
+        return ldl_be_phys(&address_space_memory, pa);
+    }
+    return ldl_le_phys(&address_space_memory, pa);
+}
+
+static inline uint64_t virtio_ldq_phys(VirtIODevice *vdev, hwaddr pa)
+{
+    if (virtio_access_is_big_endian(vdev)) {
+        return ldq_be_phys(&address_space_memory, pa);
+    }
+    return ldq_le_phys(&address_space_memory, pa);
+}
+
+static inline void virtio_stw_phys(VirtIODevice *vdev, hwaddr pa,
+                                   uint16_t value)
+{
+    if (virtio_access_is_big_endian(vdev)) {
+        stw_be_phys(&address_space_memory, pa, value);
+    } else {
+        stw_le_phys(&address_space_memory, pa, value);
+    }
+}
+
+static inline void virtio_stl_phys(VirtIODevice *vdev, hwaddr pa,
+                                   uint32_t value)
+{
+    if (virtio_access_is_big_endian(vdev)) {
+        stl_be_phys(&address_space_memory, pa, value);
+    } else {
+        stl_le_phys(&address_space_memory, pa, value);
+    }
+}
+
+static inline void virtio_stw_p(VirtIODevice *vdev, void *ptr, uint16_t v)
+{
+    if (virtio_access_is_big_endian(vdev)) {
+        stw_be_p(ptr, v);
+    } else {
+        stw_le_p(ptr, v);
+    }
+}
+
+static inline void virtio_stl_p(VirtIODevice *vdev, void *ptr, uint32_t v)
+{
+    if (virtio_access_is_big_endian(vdev)) {
+        stl_be_p(ptr, v);
+    } else {
+        stl_le_p(ptr, v);
+    }
+}
+
+static inline void virtio_stq_p(VirtIODevice *vdev, void *ptr, uint64_t v)
+{
+    if (virtio_access_is_big_endian(vdev)) {
+        stq_be_p(ptr, v);
+    } else {
+        stq_le_p(ptr, v);
+    }
+}
+
+static inline int virtio_lduw_p(VirtIODevice *vdev, const void *ptr)
+{
+    if (virtio_access_is_big_endian(vdev)) {
+        return lduw_be_p(ptr);
+    } else {
+        return lduw_le_p(ptr);
+    }
+}
+
+static inline int virtio_ldl_p(VirtIODevice *vdev, const void *ptr)
+{
+    if (virtio_access_is_big_endian(vdev)) {
+        return ldl_be_p(ptr);
+    } else {
+        return ldl_le_p(ptr);
+    }
+}
+
+static inline uint64_t virtio_ldq_p(VirtIODevice *vdev, const void *ptr)
+{
+    if (virtio_access_is_big_endian(vdev)) {
+        return ldq_be_p(ptr);
+    } else {
+        return ldq_le_p(ptr);
+    }
+}
+
+static inline uint16_t virtio_tswap16(VirtIODevice *vdev, uint16_t s)
+{
+#ifdef HOST_WORDS_BIGENDIAN
+    return virtio_access_is_big_endian(vdev) ? s : bswap16(s);
+#else
+    return virtio_access_is_big_endian(vdev) ? bswap16(s) : s;
+#endif
+}
+
+static inline void virtio_tswap16s(VirtIODevice *vdev, uint16_t *s)
+{
+    *s = virtio_tswap16(vdev, *s);
+}
+
+static inline uint32_t virtio_tswap32(VirtIODevice *vdev, uint32_t s)
+{
+#ifdef HOST_WORDS_BIGENDIAN
+    return virtio_access_is_big_endian(vdev) ? s : bswap32(s);
+#else
+    return virtio_access_is_big_endian(vdev) ? bswap32(s) : s;
+#endif
+}
+
+static inline void virtio_tswap32s(VirtIODevice *vdev, uint32_t *s)
+{
+    *s = virtio_tswap32(vdev, *s);
+}
+
+static inline uint64_t virtio_tswap64(VirtIODevice *vdev, uint64_t s)
+{
+#ifdef HOST_WORDS_BIGENDIAN
+    return virtio_access_is_big_endian(vdev) ? s : bswap64(s);
+#else
+    return virtio_access_is_big_endian(vdev) ? bswap64(s) : s;
+#endif
+}
+
+static inline void virtio_tswap64s(VirtIODevice *vdev, uint64_t *s)
+{
+    *s = virtio_tswap64(vdev, *s);
+}
+#endif /* _QEMU_VIRTIO_ACCESS_H */
diff --git a/include/hw/virtio/virtio.h b/include/hw/virtio/virtio.h
index 3e54e90aad..a60104ca24 100644
--- a/include/hw/virtio/virtio.h
+++ b/include/hw/virtio/virtio.h
@@ -104,6 +104,12 @@ typedef struct VirtQueueElement
 #define VIRTIO_DEVICE(obj) \
         OBJECT_CHECK(VirtIODevice, (obj), TYPE_VIRTIO_DEVICE)
 
+enum virtio_device_endian {
+    VIRTIO_DEVICE_ENDIAN_UNKNOWN,
+    VIRTIO_DEVICE_ENDIAN_LITTLE,
+    VIRTIO_DEVICE_ENDIAN_BIG,
+};
+
 struct VirtIODevice
 {
     DeviceState parent_obj;
@@ -121,6 +127,7 @@ struct VirtIODevice
     bool vm_running;
     VMChangeStateEntry *vmstate;
     char *bus_name;
+    uint8_t device_endian;
 };
 
 typedef struct VirtioDeviceClass {
@@ -150,6 +157,8 @@ typedef struct VirtioDeviceClass {
      * must mask in frontend instead.
      */
     void (*guest_notifier_mask)(VirtIODevice *vdev, int n, bool mask);
+    void (*save)(VirtIODevice *vdev, QEMUFile *f);
+    int (*load)(VirtIODevice *vdev, QEMUFile *f, int version_id);
 } VirtioDeviceClass;
 
 void virtio_init(VirtIODevice *vdev, const char *name,
@@ -184,7 +193,7 @@ void virtio_notify(VirtIODevice *vdev, VirtQueue *vq);
 
 void virtio_save(VirtIODevice *vdev, QEMUFile *f);
 
-int virtio_load(VirtIODevice *vdev, QEMUFile *f);
+int virtio_load(VirtIODevice *vdev, QEMUFile *f, int version_id);
 
 void virtio_notify_config(VirtIODevice *vdev);
 
@@ -253,4 +262,10 @@ void virtio_queue_set_host_notifier_fd_handler(VirtQueue *vq, bool assign,
                                                bool set_handler);
 void virtio_queue_notify_vq(VirtQueue *vq);
 void virtio_irq(VirtQueue *vq);
+
+static inline bool virtio_is_big_endian(VirtIODevice *vdev)
+{
+    assert(vdev->device_endian != VIRTIO_DEVICE_ENDIAN_UNKNOWN);
+    return vdev->device_endian == VIRTIO_DEVICE_ENDIAN_BIG;
+}
 #endif