To make sections optional, we need to do it at the beggining of the code.
Signed-off-by: NJuan Quintela <quintela@redhat.com>
Reviewed-by: NDr. David Alan Gilbert <dgilbert@redhat.com>

This includes a new section that for now just stores the current qemu state.

Right now, there are only one way to control what is the state of the
target after migration.

- If you run the target qemu with -S, it would start stopped.
- If you run the target qemu without -S, it would run just after migration finishes.

The problem here is what happens if we start the target without -S and
there happens one error during migration that puts current state as
-EIO.  Migration would ends (notice that the error happend doing block
IO, network IO, i.e. nothing related with migration), and when
migration finish, we would just "continue" running on destination,
probably hanging the guest/corruption data, whatever.
Signed-off-by: NJuan Quintela <quintela@redhat.com>
Reviewed-by: NDr. David Alan Gilbert <dgilbert@redhat.com>

Use the order of incoming RAMBlocks from the source to record
an index number; that then allows us to sort the destination
local RAMBlock list to match the source.

Now that the RAMBlocks are known to be in the same order, this
simplifies the RDMA Registration step which previously tried to
match RAMBlocks based on offset (which isn't guaranteed to match).

Looking at the existing compress code, I think it was erroneously
relying on an assumption of matching ordering, which this fixes.
Signed-off-by: NDr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: NJuan Quintela <quintela@redhat.com>

In the next patch we remove the hash on the destination,
rdma_delete_block does two things with the hash which can be avoided:
  a) The caller passes the offset and rdma_delete_block looks it up
     in the hash; fixed by getting the caller to pass the block
  b) The hash gets recreated after deletion; fixed by making that
     conditional on the hash being initialised.

While this function is currently only used during cleanup, Michael
asked that we keep it general for future dynamic block registration
work.
Signed-off-by: NDr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: NJuan Quintela <quintela@redhat.com>

We need the names of RAMBlocks as they're loaded for RDMA,
reuse a slightly modified ram_control_load_hook:
  a) Pass a 'data' parameter to use for the name in the block-reg
     case
  b) Only some hook types now require the presence of a hook function.
Signed-off-by: NDr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: NJuan Quintela <quintela@redhat.com>

In a later patch the block name will be used to match up two views
of the block list.  Keep a copy of the block name with the local block
list.

(At some point it could be argued that it would be best just to let
migration see the innards of RAMBlock and avoid the need to use
foreach).
Signed-off-by: NDr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: NMichael R. Hines <mrhines@us.ibm.com>
Signed-off-by: NJuan Quintela <quintela@redhat.com>

A couple of typo fixes.
Signed-off-by: NDr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: NJuan Quintela <quintela@redhat.com>

This patch aims at optimizing IRQ handling using irqfd framework.

Instead of handling the eventfds on user-side they are handled on
kernel side using
- the KVM irqfd framework,
- the VFIO driver virqfd framework.

the virtual IRQ completion is trapped at interrupt controller
This removes the need for fast/slow path swap.

Overall this brings significant performance improvements.
Signed-off-by: NAlvise Rigo <a.rigo@virtualopensystems.com>
Signed-off-by: NEric Auger <eric.auger@linaro.org>
Reviewed-by: NAlex Bennée <alex.bennee@linaro.org>
Tested-by: NVikram Sethi <vikrams@codeaurora.org>
Acked-by: NPeter Maydell <peter.maydell@linaro.org>
Signed-off-by: NAlex Williamson <alex.williamson@redhat.com>

Signed-off-by: NKővágó, Zoltán <DirtY.iCE.hu@gmail.com>
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

Signed-off-by: NKővágó, Zoltán <DirtY.iCE.hu@gmail.com>
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

Split qemu_savevm_state_begin to:
  qemu_savevm_state_header   That writes the initial file header.
  qemu_savevm_state_begin    That sets up devices and does the first
                             device pass.

Used later in postcopy.
Signed-off-by: NDr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: NAmit Shah <amit.shah@redhat.com>
Reviewed-by: NDavid Gibson <david@gibson.dropbear.id.au>
Reviewed-by: NJuan Quintela <quintela@redhat.com>
Signed-off-by: NJuan Quintela <quintela@redhat.com>

Now, everything is in place.
Signed-off-by: NJuan Quintela <quintela@redhat.com>
Reviewed-by: NEric Blake <eblake@redhat.com>

For historic reasons, ram migration have been on arch_init.c.  Just
split it into migration/ram.c, the same that happened with block.c.

There is only code movement, no changes altogether.
Signed-off-by: NJuan Quintela <quintela@redhat.com>
Reviewed-by: NEric Blake <eblake@redhat.com>

Remove also unneeded debug logs.
Signed-off-by: NHervé Poussineau <hpoussin@reactos.org>
Reviewed-by: NAurelien Jarno <aurelien@aurel32.net>
Signed-off-by: NLeon Alrae <leon.alrae@imgtec.com>

This patch adds the core code for virtio gpu emulation,
covering 2d support.

Written by Dave Airlie and Gerd Hoffmann.
Signed-off-by: NDave Airlie <airlied@redhat.com>
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

Exit with an error (instead of simply logging a trace event)
whenever the same fw_cfg file name is added multiple times via
one of the fw_cfg_add_file[_callback]() host-side API calls.
Signed-off-by: NGabriel Somlo <somlo@cmu.edu>
Reviewed-by: NLaszlo Ersek <lersek@redhat.com>
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

From this point forward, any guest-side writes to the fw_cfg
data register will be treated as no-ops. This patch also removes
the unused host-side API function fw_cfg_add_callback(), which
allowed the registration of a callback to be executed each time
the guest completed a full overwrite of a given fw_cfg data item.
Signed-off-by: NGabriel Somlo <somlo@cmu.edu>
Reviewed-by: NLaszlo Ersek <lersek@redhat.com>
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

This patch adds the code requested to assign interrupts to
a guest. The interrupts are mediated through user handled
eventfds only.
Signed-off-by: NEric Auger <eric.auger@linaro.org>
Tested-by: NVikram Sethi <vikrams@codeaurora.org>
Signed-off-by: NAlex Williamson <alex.williamson@redhat.com>

Minimal VFIO platform implementation supporting register space
user mapping but not IRQ assignment.
Signed-off-by: NKim Phillips <kim.phillips@linaro.org>
Signed-off-by: NEric Auger <eric.auger@linaro.org>
Tested-by: NVikram Sethi <vikrams@codeaurora.org>
Signed-off-by: NAlex Williamson <alex.williamson@redhat.com>

This is to reduce VIO noise while debugging PCI DMA.
Signed-off-by: NAlexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: NDavid Gibson <david@gibson.dropbear.id.au>
Signed-off-by: NAlexander Graf <agraf@suse.de>

Introduce a preliminary framework in virt-acpi-build.c with the main
ACPI build functions. It exposes the generated ACPI contents to
guest over fw_cfg.

The required ACPI v5.1 tables for ARM are:
- RSDP: Initial table that points to XSDT
- RSDT: Points to FADT GTDT MADT tables
- FADT: Generic information about the machine
- GTDT: Generic timer description table
- MADT: Multiple APIC description table
- DSDT: Holds all information about system devices/peripherals, pointed by FADT
Signed-off-by: NShannon Zhao <zhaoshenglong@huawei.com>
Signed-off-by: NShannon Zhao <shannon.zhao@linaro.org>
Reviewed-by: NAlex Bennée <alex.bennee@linaro.org>
Reviewed-by: NIgor Mammedov <imammedo@redhat.com>
Message-id: 1432522520-8068-5-git-send-email-zhaoshenglong@huawei.com
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>

When memory hot unplug fails, this patch adds support to send
QMP event to notify mgmt about this failure.
Reviewed-by: NIgor Mammedov <imammedo@redhat.com>
Signed-off-by: NZhu Guihua <zhugh.fnst@cn.fujitsu.com>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

- implements QEMU hardware part of memory hot unplug protocol
  described at "docs/spec/acpi_mem_hotplug.txt"
- handles memory remove notification event
- handles device eject notification
Reviewed-by: NIgor Mammedov <imammedo@redhat.com>
Signed-off-by: NZhu Guihua <zhugh.fnst@cn.fujitsu.com>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

This patch adds tracing code for all SIGP orders (including the destination
vcpu and the resulting condition code).
Reviewed-by: NThomas Huth <thuth@linux.vnet.ibm.com>
Reviewed-by: NCornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: NJens Freimann <jfrei@linux.vnet.ibm.com>
Signed-off-by: NDavid Hildenbrand <dahi@linux.vnet.ibm.com>
Message-Id: <1424783731-43426-6-git-send-email-jfrei@linux.vnet.ibm.com>
Signed-off-by: NChristian Borntraeger <borntraeger@de.ibm.com>

Add some trace events for easier debugging
Signed-off-by: Nzhanghailiang <zhang.zhanghailiang@huawei.com>
Signed-off-by: NLuiz Capitulino <lcapitulino@redhat.com>

It looks like the dtrace trace code gets upset if you have trace names
with __ in, which the migration/rdma.c code does.

Rename the functions and the associated traces.

Fixes: 733252deSigned-off-by: NDr. David Alan Gilbert <dgilbert@redhat.com>
Reported-by: NAndreas Färber <afaerber@suse.de>
Reviewed-by: NPaolo Bonzini <pbonzini@redhat.com>
Tested-by: NAndreas Färber <afaerber@suse.de>
Message-id: 1424105885-12149-1-git-send-email-dgilbert@redhat.com
Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>

Signed-off-by: NDon Koch <dkoch@verizon.com>
Signed-off-by: NMichael Tokarev <mjt@tls.msk.ru>

Add trace calls. Convert some #ifdef DEBUG printfs to trace.
Signed-off-by: NDon Koch <dkoch@verizon.com>
Signed-off-by: NMichael Tokarev <mjt@tls.msk.ru>

Signed-off-by: NDon Koch <dkoch@verizon.com>
Signed-off-by: NMichael Tokarev <mjt@tls.msk.ru>

Signed-off-by: NDon Koch <dkoch@verizon.com>
Signed-off-by: NMichael Tokarev <mjt@tls.msk.ru>

this patch finally introduces multiread support to virtio-blk. While
multiwrite support was there for a long time, read support was missing.

The complete merge logic is moved into virtio-blk.c which has
been the only user of request merging ever since. This is required
to be able to merge chunks of requests and immediately invoke callbacks
for those requests. Secondly, this is required to switch to
direct invocation of coroutines which is planned at a later stage.

The following benchmarks show the performance of running fio with
4 worker threads on a local ram disk. The numbers show the average
of 10 test runs after 1 run as warmup phase.

              |        4k        |       64k        |        4k
MB/s          | rd seq | rd rand | rd seq | rd rand | wr seq | wr rand
--------------+--------+---------+--------+---------+--------+--------
master        | 1221   | 1187    | 4178   | 4114    | 1745   | 1213
multiread     | 1829   | 1189    | 4639   | 4110    | 1894   | 1216
Signed-off-by: NPeter Lieven <pl@kamp.de>
Signed-off-by: NKevin Wolf <kwolf@redhat.com>

Turn all the D/DD/DDDPRINTFs into trace events
Turn most of the fprintf(stderr, into error_report
Signed-off-by: NDr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: NAmit Shah <amit.shah@redhat.com>
Signed-off-by: NJuan Quintela <quintela@redhat.com>

Mostly on the load side, so that when we get a complaint about
a migration failure we can figure out what it didn't like.
Signed-off-by: NDr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: NAmit Shah <amit.shah@redhat.com>
Signed-off-by: NJuan Quintela <quintela@redhat.com>

Signed-off-by: NDon Koch <dkoch@verizon.com>
Acked-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

The ioreq-server API added to Xen 4.5 offers better security than
the existing Xen/QEMU interface because the shared pages that are
used to pass emulation request/results back and forth are removed
from the guest's memory space before any requests are serviced.
This prevents the guest from mapping these pages (they are in a
well known location) and attempting to attack QEMU by synthesizing
its own request structures. Hence, this patch modifies configure
to detect whether the API is available, and adds the necessary
code to use the API if it is.
Signed-off-by: NPaul Durrant <paul.durrant@citrix.com>
Signed-off-by: NStefano Stabellini <stefano.stabellini@eu.citrix.com>
Acked-by: NStefano Stabellini <stefano.stabellini@eu.citrix.com>

A new common module is created. It implements all functions
that have no device specificity (PCI, Platform).

This patch only consists in move (no functional changes)
Signed-off-by: NKim Phillips <kim.phillips@linaro.org>
Signed-off-by: NEric Auger <eric.auger@linaro.org>
Signed-off-by: NAlex Williamson <alex.williamson@redhat.com>

Signed-off-by: NEric Auger <eric.auger@linaro.org>
Signed-off-by: NAlex Williamson <alex.williamson@redhat.com>

vfio_get_device now takes a VFIODevice as argument. The function is split
into 2 parts: vfio_get_device which is generic and vfio_populate_device
which is bus specific.

3 new fields are introduced in VFIODevice to store dev_info.

vfio_put_base_device is created.
Signed-off-by: NEric Auger <eric.auger@linaro.org>
Signed-off-by: NAlex Williamson <alex.williamson@redhat.com>

This structure is going to be shared by VFIOPCIDevice and
VFIOPlatformDevice. VFIOBAR includes it.

vfio_eoi becomes an ops of VFIODevice specialized by parent device.
This makes possible to transform vfio_bar_write/read into generic
vfio_region_write/read that will be used by VFIOPlatformDevice too.

vfio_mmap_bar becomes vfio_map_region
Signed-off-by: NEric Auger <eric.auger@linaro.org>
Signed-off-by: NAlex Williamson <alex.williamson@redhat.com>

This patch removes all DPRINTF and replace them by trace points.
A few DPRINTF used in error cases were transformed into error_report.
Signed-off-by: NEric Auger <eric.auger@linaro.org>
Signed-off-by: NAlex Williamson <alex.williamson@redhat.com>