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

vhost, virtio, pci, pc

Fixes all over the place.
virtio dataplane migration support.
Old q35 machine types removed.

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

# gpg: Signature made Thu 25 Feb 2016 11:16:46 GMT 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: (21 commits)
  q35: No need to check gigabyte_align
  q35: Remove unused q35-acpi-dsdt.aml file
  ich9: Remove enable_tco arguments from init functions
  machine: Remove no_tco field
  q35: Remove old machine versions
  tests/vhost-user-bridge: fix build on 32 bit systems
  vring: remove
  virtio-scsi: do not use vring in dataplane
  virtio-blk: do not use vring in dataplane
  virtio-blk: fix "disabled data plane" mode
  virtio: export vring_notify as virtio_should_notify
  virtio: add AioContext-specific function for host notifiers
  vring: make vring_enable_notification return void
  block-migration: acquire AioContext as necessary
  pci core: function pci_bus_init() cleanup
  pci core: function pci_host_bus_register() cleanup
  balloon: Use only 'pc-dimm' type dimm for ballooning
  virtio-balloon: rewrite get_current_ram_size()
  move get_current_ram_size to virtio-balloon.c
  vhost-user: don't merge regions with different fds
  ...

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

6 files changed, 9 insertions, 149 deletions

diff --git a/include/hw/virtio/dataplane/vring-accessors.h b/include/hw/virtio/dataplane/vring-accessors.h
deleted file mode 100644
index 815c19b6ef..0000000000
--- a/include/hw/virtio/dataplane/vring-accessors.h
+++ /dev/null
@@ -1,75 +0,0 @@
-#ifndef VRING_ACCESSORS_H
-#define VRING_ACCESSORS_H
-
-#include "standard-headers/linux/virtio_ring.h"
-#include "hw/virtio/virtio.h"
-#include "hw/virtio/virtio-access.h"
-
-static inline uint16_t vring_get_used_idx(VirtIODevice *vdev, Vring *vring)
-{
-    return virtio_tswap16(vdev, vring->vr.used->idx);
-}
-
-static inline void vring_set_used_idx(VirtIODevice *vdev, Vring *vring,
-                                      uint16_t idx)
-{
-    vring->vr.used->idx = virtio_tswap16(vdev, idx);
-}
-
-static inline uint16_t vring_get_avail_idx(VirtIODevice *vdev, Vring *vring)
-{
-    return virtio_tswap16(vdev, vring->vr.avail->idx);
-}
-
-static inline uint16_t vring_get_avail_ring(VirtIODevice *vdev, Vring *vring,
-                                            int i)
-{
-    return virtio_tswap16(vdev, vring->vr.avail->ring[i]);
-}
-
-static inline void vring_set_used_ring_id(VirtIODevice *vdev, Vring *vring,
-                                          int i, uint32_t id)
-{
-    vring->vr.used->ring[i].id = virtio_tswap32(vdev, id);
-}
-
-static inline void vring_set_used_ring_len(VirtIODevice *vdev, Vring *vring,
-                                          int i, uint32_t len)
-{
-    vring->vr.used->ring[i].len = virtio_tswap32(vdev, len);
-}
-
-static inline uint16_t vring_get_used_flags(VirtIODevice *vdev, Vring *vring)
-{
-    return virtio_tswap16(vdev, vring->vr.used->flags);
-}
-
-static inline uint16_t vring_get_avail_flags(VirtIODevice *vdev, Vring *vring)
-{
-    return virtio_tswap16(vdev, vring->vr.avail->flags);
-}
-
-static inline void vring_set_used_flags(VirtIODevice *vdev, Vring *vring,
-                                        uint16_t flags)
-{
-    vring->vr.used->flags |= virtio_tswap16(vdev, flags);
-}
-
-static inline void vring_clear_used_flags(VirtIODevice *vdev, Vring *vring,
-                                          uint16_t flags)
-{
-    vring->vr.used->flags &= virtio_tswap16(vdev, ~flags);
-}
-
-static inline unsigned int vring_get_num(Vring *vring)
-{
-    return vring->vr.num;
-}
-
-/* Are there more descriptors available? */
-static inline bool vring_more_avail(VirtIODevice *vdev, Vring *vring)
-{
-    return vring_get_avail_idx(vdev, vring) != vring->last_avail_idx;
-}
-
-#endif
diff --git a/include/hw/virtio/dataplane/vring.h b/include/hw/virtio/dataplane/vring.h
deleted file mode 100644
index e80985ee4c..0000000000
--- a/include/hw/virtio/dataplane/vring.h
+++ /dev/null
@@ -1,51 +0,0 @@
-/* Copyright 2012 Red Hat, Inc. and/or its affiliates
- * Copyright IBM, Corp. 2012
- *
- * Based on Linux 2.6.39 vhost code:
- * Copyright (C) 2009 Red Hat, Inc.
- * Copyright (C) 2006 Rusty Russell IBM Corporation
- *
- * Author: Michael S. Tsirkin <mst@redhat.com>
- *         Stefan Hajnoczi <stefanha@redhat.com>
- *
- * Inspiration, some code, and most witty comments come from
- * Documentation/virtual/lguest/lguest.c, by Rusty Russell
- *
- * This work is licensed under the terms of the GNU GPL, version 2.
- */
-
-#ifndef VRING_H
-#define VRING_H
-
-#include "qemu-common.h"
-#include "standard-headers/linux/virtio_ring.h"
-#include "hw/virtio/virtio.h"
-
-typedef struct {
-    MemoryRegion *mr_desc;          /* memory region for the vring desc */
-    MemoryRegion *mr_avail;         /* memory region for the vring avail */
-    MemoryRegion *mr_used;          /* memory region for the vring used */
-    struct vring vr;                /* virtqueue vring mapped to host memory */
-    uint16_t last_avail_idx;        /* last processed avail ring index */
-    uint16_t last_used_idx;         /* last processed used ring index */
-    uint16_t signalled_used;        /* EVENT_IDX state */
-    bool signalled_used_valid;
-    bool broken;                    /* was there a fatal error? */
-} Vring;
-
-/* Fail future vring_pop() and vring_push() calls until reset */
-static inline void vring_set_broken(Vring *vring)
-{
-    vring->broken = true;
-}
-
-bool vring_setup(Vring *vring, VirtIODevice *vdev, int n);
-void vring_teardown(Vring *vring, VirtIODevice *vdev, int n);
-void vring_disable_notification(VirtIODevice *vdev, Vring *vring);
-bool vring_enable_notification(VirtIODevice *vdev, Vring *vring);
-bool vring_should_notify(VirtIODevice *vdev, Vring *vring);
-void *vring_pop(VirtIODevice *vdev, Vring *vring, size_t sz);
-void vring_push(VirtIODevice *vdev, Vring *vring, VirtQueueElement *elem,
-                int len);
-
-#endif /* VRING_H */
diff --git a/include/hw/virtio/vhost-backend.h b/include/hw/virtio/vhost-backend.h
index d6b012f6be..95fcc96676 100644
--- a/include/hw/virtio/vhost-backend.h
+++ b/include/hw/virtio/vhost-backend.h
@@ -69,6 +69,9 @@ typedef int (*vhost_set_vring_enable_op)(struct vhost_dev *dev,
 typedef bool (*vhost_requires_shm_log_op)(struct vhost_dev *dev);
 typedef int (*vhost_migration_done_op)(struct vhost_dev *dev,
                                        char *mac_addr);
+typedef bool (*vhost_backend_can_merge_op)(struct vhost_dev *dev,
+                                           uint64_t start1, uint64_t size1,
+                                           uint64_t start2, uint64_t size2);
 
 typedef struct VhostOps {
     VhostBackendType backend_type;
@@ -96,6 +99,7 @@ typedef struct VhostOps {
     vhost_set_vring_enable_op vhost_set_vring_enable;
     vhost_requires_shm_log_op vhost_requires_shm_log;
     vhost_migration_done_op vhost_migration_done;
+    vhost_backend_can_merge_op vhost_backend_can_merge;
 } VhostOps;
 
 extern const VhostOps user_ops;
diff --git a/include/hw/virtio/virtio-blk.h b/include/hw/virtio/virtio-blk.h
index 199bb0ebd5..ae84d92107 100644
--- a/include/hw/virtio/virtio-blk.h
+++ b/include/hw/virtio/virtio-blk.h
@@ -53,9 +53,7 @@ typedef struct VirtIOBlock {
     unsigned short sector_mask;
     bool original_wce;
     VMChangeStateEntry *change;
-    /* Function to push to vq and notify guest */
-    void (*complete_request)(struct VirtIOBlockReq *req, unsigned char status);
-    Notifier migration_state_notifier;
+    bool dataplane_started;
     struct VirtIOBlockDataPlane *dataplane;
 } VirtIOBlock;
 
diff --git a/include/hw/virtio/virtio-scsi.h b/include/hw/virtio/virtio-scsi.h
index a8029aa017..209eaa4466 100644
--- a/include/hw/virtio/virtio-scsi.h
+++ b/include/hw/virtio/virtio-scsi.h
@@ -22,7 +22,6 @@
 #include "hw/pci/pci.h"
 #include "hw/scsi/scsi.h"
 #include "sysemu/iothread.h"
-#include "hw/virtio/dataplane/vring.h"
 
 #define TYPE_VIRTIO_SCSI_COMMON "virtio-scsi-common"
 #define VIRTIO_SCSI_COMMON(obj) \
@@ -58,13 +57,6 @@ struct VirtIOSCSIConf {
 
 struct VirtIOSCSI;
 
-typedef struct {
-    struct VirtIOSCSI *parent;
-    Vring vring;
-    EventNotifier host_notifier;
-    EventNotifier guest_notifier;
-} VirtIOSCSIVring;
-
 typedef struct VirtIOSCSICommon {
     VirtIODevice parent_obj;
     VirtIOSCSIConf conf;
@@ -96,18 +88,12 @@ typedef struct VirtIOSCSI {
     QTAILQ_HEAD(, VirtIOSCSIBlkChangeNotifier) insert_notifiers;
     QTAILQ_HEAD(, VirtIOSCSIBlkChangeNotifier) remove_notifiers;
 
-    /* Vring is used instead of vq in dataplane code, because of the underlying
-     * memory layer thread safety */
-    VirtIOSCSIVring *ctrl_vring;
-    VirtIOSCSIVring *event_vring;
-    VirtIOSCSIVring **cmd_vrings;
     bool dataplane_started;
     bool dataplane_starting;
     bool dataplane_stopping;
     bool dataplane_disabled;
     bool dataplane_fenced;
     Error *blocker;
-    Notifier migration_state_notifier;
     uint32_t host_features;
 } VirtIOSCSI;
 
@@ -123,9 +109,6 @@ typedef struct VirtIOSCSIReq {
     QEMUSGList qsgl;
     QEMUIOVector resp_iov;
 
-    /* Set by dataplane code. */
-    VirtIOSCSIVring *vring;
-
     union {
         /* Used for two-stage request submission */
         QTAILQ_ENTRY(VirtIOSCSIReq) next;
@@ -168,8 +151,6 @@ void virtio_scsi_push_event(VirtIOSCSI *s, SCSIDevice *dev,
 void virtio_scsi_set_iothread(VirtIOSCSI *s, IOThread *iothread);
 void virtio_scsi_dataplane_start(VirtIOSCSI *s);
 void virtio_scsi_dataplane_stop(VirtIOSCSI *s);
-void virtio_scsi_vring_push_notify(VirtIOSCSIReq *req);
-VirtIOSCSIReq *virtio_scsi_pop_req_vring(VirtIOSCSI *s,
-                                         VirtIOSCSIVring *vring);
+void virtio_scsi_dataplane_notify(VirtIODevice *vdev, VirtIOSCSIReq *req);
 
 #endif /* _QEMU_VIRTIO_SCSI_H */
diff --git a/include/hw/virtio/virtio.h b/include/hw/virtio/virtio.h
index c38a2fef04..2b5b248b0c 100644
--- a/include/hw/virtio/virtio.h
+++ b/include/hw/virtio/virtio.h
@@ -163,6 +163,7 @@ void virtqueue_get_avail_bytes(VirtQueue *vq, unsigned int *in_bytes,
                                unsigned int *out_bytes,
                                unsigned max_in_bytes, unsigned max_out_bytes);
 
+bool virtio_should_notify(VirtIODevice *vdev, VirtQueue *vq);
 void virtio_notify(VirtIODevice *vdev, VirtQueue *vq);
 
 void virtio_save(VirtIODevice *vdev, QEMUFile *f);
@@ -249,6 +250,8 @@ void virtio_queue_set_guest_notifier_fd_handler(VirtQueue *vq, bool assign,
 EventNotifier *virtio_queue_get_host_notifier(VirtQueue *vq);
 void virtio_queue_set_host_notifier_fd_handler(VirtQueue *vq, bool assign,
                                                bool set_handler);
+void virtio_queue_aio_set_host_notifier_handler(VirtQueue *vq, AioContext *ctx,
+                                                bool assign, bool set_handler);
 void virtio_queue_notify_vq(VirtQueue *vq);
 void virtio_irq(VirtQueue *vq);
 VirtQueue *virtio_vector_first_queue(VirtIODevice *vdev, uint16_t vector);