Commit Graph

150 Commits

Author SHA1 Message Date
Paolo Bonzini
1645b8eee5 serial: only resample THR interrupt on rising edge of IER.THRI
There is disagreement on whether LSR.THRE should be resampled when
IER.THRI goes from 1 to 1.  Bochs only does it if IER.THRI goes from 0
to 1; PCE does it even if IER.THRI is unchanged.  But the Windows driver
seems to always go from 1 to 0 and back to 1, so do things in agreement
with Bochs, because the handling of thr_ipending was reported in 2010
(https://lists.gnu.org/archive/html/qemu-devel/2010-03/msg01914.html)
as breaking DR-DOS Plus.

Reported-by: Roy Tam <roytam@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-12-15 17:34:42 +01:00
Paolo Bonzini
023c3a9707 serial: update LSR on enabling/disabling FIFOs
When the transmit FIFO is emptied or enabled, the transmitter
hold register is empty.  When it is disabled, it is also emptied and
in addition the previous contents of the transmitter hold register
are discarded.  In either case, the THRE bit in LSR must be set and
THRI raised.

When the receive FIFO is emptied or enabled, the data ready and break
bits must be cleared in LSR.  Likewise when the receive FIFO is disabled.

Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-12-15 17:34:05 +01:00
Paolo Bonzini
0d931d7062 serial: clean up THRE/TEMT handling
- assert TEMT is cleared before sending a character; we'll get one from
TSR if tsr_retry > 0, from the FIFO or THR otherwise

- assert THRE cleared and FIFO not empty (if enabled) before fetching a
character to send.  This effectively reverts dffacd46, but the check
makes no sense and commit f702e62 (serial: change retry logic to avoid
concurrency, 2014-07-11) must have made it unnecessary.  The commit
message for f702e62 talks about multiple calls to qemu_chr_fe_add_watch
triggering s->tsr_retry >= MAX_XMIT_RETRY, but other failures were
possible.  For example, if you have multiple calls, the subsequent ones
will see s->tsr_retry == 0 and will find THRE and/or TEMT on entry.

- for clarity, raise THRI immediately after the code sets THRE

- check THRE to see if another character has to be sent.  This makes
the assertions more obvious and also means TEMT has to be set as soon as
the loop ends.  It makes the loop send both TSR and THR if flow-control
happens in non-FIFO mode.  Previously, THR would be lost.

- clear TEMT together with THRE even in the non-FIFO case

The last two items are bugfixes, but they were just found by inspection
and do not squash known bugs.

Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-12-15 17:33:37 +01:00
Paolo Bonzini
4e02b0fcf5 serial: reset thri_pending on IER writes with THRI=0
This is responsible for failure of migration from 2.2 to 2.1, because
thr_ipending is always one in practice.

serial.c is setting thr_ipending unconditionally.  However, thr_ipending
is not used at all if THRI=0, and it will be overwritten again the next
time THRE or THRI changes.  For that reason, we can set thr_ipending to
zero every time THRI is reset.

There is disagreement on whether LSR.THRE should be resampled when IER.THRI
goes from 1 to 1.  This patch does not touch the code, leaving that for
QEMU 2.3+.

This has no semantic change and is enough to fix migration in the common
case where the interrupt is not pending or is reported in IIR.  It does not
change the migration format, so 2.2.0 -> 2.1 will remain broken but we
can fix 2.2.1 -> 2.1 without breaking 2.2.1 <-> 2.2.0.

The case that remains broken (the one in which the subsection is strictly
necessary) is when THRE=1, the THRI interrupt has *not* been acknowledged
yet, and a higher-priority interrupt comes.  In this case, you need the
subsection to tell the source that the lower-priority THRI interrupt is
pending.  The subsection's breakage of migration, in this case, prevents
continuing the VM on the destination with an invalid state.

Cc: qemu-stable@nongnu.org
Reported-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-12-15 14:35:53 +01:00
Peter Maydell
7a8dda7e5d Several bugfixes for s390x:
- instruction decoding and sparse warning in kvm
 - overlong input and hangs in the sclp consoles
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1.4.11 (GNU/Linux)
 
 iQIcBAABAgAGBQJUWkVWAAoJEN7Pa5PG8C+vB1oP/1UIcGNXd4L8iaDeT5Q2Uq9q
 sBfd81EkuR7F80p1l3KfEq+4krdcNj/5zQTDG0Mq8dsH+qBvgI5gjaih18ECpRRl
 hCvPsRRPaTu7intLLVbjLopkOJLFOPnSyIn91jjQVfZxm6gNAH8/G1/EM9xRjWU6
 q7FN7bXDi8reERllsMfWNpMoVZXXd5Nw+oChHO9neo3jKfSSBVaqJQvhp4PZLHhE
 Bchn0HbsrMe0xaabRA6AqOeKgw7bSlUsgMc8U98OaBkWoCDnj8Vb3ZK2xKa3aHY4
 +BWxwDSEM0hEG7r3mI+YDbXANEiiFFtArX9A6v6RzydR/nezL5m7Ngbdwlxq3MQK
 xiJ98kQGoufaq2/oFhwqy9CGAOBAr4i8PRHSoe5cyOuoiPrblZ91CiwV9H615HBr
 /CSdu8uQQr3m1U8tELOEqMWERNv3LnVxL45SZf1NYihttp4Uj//+eWrqy16L/fdB
 IYpfLMbRB06V7K1TJEiwLnoh1oiUsY7iG86cLfUPzrExxR0aDehJiJ3vTHDLCbk8
 Ep9ko+CUcEZwqQ4/GgN+SWObfPlZ3jiLg1GNU3VbbLhtHQC26FZJ6xxVZztfkh9p
 hJx594jDMsttoN1DuZeX7Xo4qf/5Sw0qGk7hl98KuwgX8Yuy+DkqMQP9DApd3RYC
 v8OCU4hKv7kw96EJ1zOV
 =hUn1
 -----END PGP SIGNATURE-----

Merge remote-tracking branch 'remotes/cohuck/tags/s390x-20141105' into staging

Several bugfixes for s390x:
- instruction decoding and sparse warning in kvm
- overlong input and hangs in the sclp consoles

# gpg: Signature made Wed 05 Nov 2014 15:42:14 GMT using RSA key ID C6F02FAF
# gpg: Good signature from "Cornelia Huck <huckc@linux.vnet.ibm.com>"
# gpg:                 aka "Cornelia Huck <cornelia.huck@de.ibm.com>"

* remotes/cohuck/tags/s390x-20141105:
  s390x/sclpconsole: Avoid hanging SCLP ASCII console
  s390x/sclpconsole-lm: Fix hanging SCLP line mode console
  s390x/sclpconsole-lm: truncate input if line is too long
  s390x/kvm: Fix warning from sparse
  s390x/kvm: Fix opcode decoding for eb instruction handler

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-11-10 14:58:59 +00:00
Marc-André Lureau
7eb7311427 virtio-serial: avoid crash when port has no name
It seems "name" is not mandatory, and the following command line (based
on one generated by current libvirt) will crash qemu at start:

qemu-system-x86_64 \
    -device virtio-serial-pci \
    -device virtserialport,name=foo \
    -device virtconsole

Program received signal SIGSEGV, Segmentation fault.
__strcmp_ssse3 () at ../sysdeps/x86_64/strcmp.S:210
210        movlpd    (%rsi), %xmm2
Missing separate debuginfos, use: debuginfo-install
python-libs-2.7.5-13.fc20.x86_64
(gdb) bt
 #0  __strcmp_ssse3 () at ../sysdeps/x86_64/strcmp.S:210
 #1  0x000055555566bdc6 in find_port_by_name (name=0x0) at /home/elmarco/src/qemu/hw/char/virtio-serial-bus.c:67

Signed-off-by: Marc-André Lureau <marcandre.lureau@gmail.com>
Reviewed-by: Amos Kong <akong@redhat.com>
Signed-off-by: Amit Shah <amit.shah@redhat.com>
2014-11-07 10:27:11 +05:30
Heinz Graalfs
bb3e9e1fd7 s390x/sclpconsole: Avoid hanging SCLP ASCII console
Force recalculation of file descriptor sets for main loop's poll(),
in order to be able to readd a possibly removed input file descriptor
after can_read() returned 0 (zero).

Signed-off-by: Heinz Graalfs <graalfs@linux.vnet.ibm.com>
Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2014-11-05 16:35:56 +01:00
Heinz Graalfs
87f2eff016 s390x/sclpconsole-lm: Fix hanging SCLP line mode console
Trigger recalculating sets of file descriptors for the main loop's poll()
in order to make sure a possibly removed FD 0 from the poll() file
descriptor array is re-added. FD 0 is removed from the decriptor array
when the console's can_read() callback returns 0.

Signed-off-by: Heinz Graalfs <graalfs@linux.vnet.ibm.com>
Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2014-11-05 16:35:56 +01:00
Heinz Graalfs
b3191432cf s390x/sclpconsole-lm: truncate input if line is too long
As the SCLP line mode console input length is limited by the available
SCCB buffer space, it might lock up if the input does not fit into the
buffer.

With this patch, characters that don't fit are 'eaten' up to the next
CR/LF and the input line is sent truncated to the guest.

Signed-off-by: Heinz Graalfs <graalfs@linux.vnet.ibm.com>
Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2014-11-05 16:35:55 +01:00
Igor Mammedov
0ddef15b04 virtio-serial: Convert to hotplug-handler API
Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
2014-10-15 05:03:13 +02:00
Paolo Bonzini
a30cf8760f serial: check if backed by a physical serial port at realize time
Right now, s->poll_msl may linger at "0" value for an arbitrarily long
time, until serial_update_msl is called for the first time.  This is
unnecessary, and will lead to the s->poll_msl field being unnecessarily
migrated.

We can call serial_update_msl immediately at realize time (via
serial_reset) and be done with it.  The memory-mapped UART was already
doing that, but not the ISA and PCI variants.

Regarding the delta bits, be consistent with what serial_reset does when
the serial port is not backed by a physical serial port, and always clear
them at reset time.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-09-19 10:50:07 +02:00
Paolo Bonzini
4df7961faa serial: reset state at startup
When a serial port is started, its initial state is all zero.  Make
it consistent with reset state instead.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-09-19 10:50:07 +02:00
Pavel Dovgalyuk
7385b275d9 serial: fixing vmstate for save/restore
Some fields were added to VMState by this patch to preserve correct
loading of the serial port controller state.
Updating FCR value while loading was also modified to disable generating
an interrupt by loadvm.

Signed-off-by: Pavel Dovgalyuk <Pavel.Dovgaluk@ispras.ru>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-09-11 12:20:32 +02:00
Pavel Dovgalyuk
461a2753a1 parallel: adding vmstate for save/restore
VMState added by this patch preserves correct
loading of the parallel port controller state.

Signed-off-by: Pavel Dovgalyuk <Pavel.Dovgaluk@ispras.ru>
Acked-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-09-11 12:20:32 +02:00
Peter Maydell
0e4a773705 SCSI changes that enable sending vendor-specific commands via virtio-scsi.
Memory changes for QOMification and automatic tracking of MR lifetime.
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v2.0.22 (GNU/Linux)
 
 iQIcBAABAgAGBQJT8et9AAoJEBvWZb6bTYbyIJAQAI3AlLSe27xWoUGfQUgWH30z
 Rt/pShHz3BJMfQpD79JfTH8u6uBpkQmKtflerNT7FhXN9ULDzNq+b/jRtke8nkuy
 ctCt05FhhK00rfWpUoRue4XiCuvbizBU7MK0DI3yCyNdXQyYnFvgnvsJtlqox8Zh
 J5HZcBJEmdCiWBxq7UPk0qBitp4PqNoy7jlD/Ex3m7fJN5WK2cyspQIT9zmhehVn
 B8Nwp+RitDDbXbwm0r18col5rFr/6Nj6+dW1gr+7sVJDLNsmJEqC2l3Kgk0wbPkG
 Uqwbih29me9PC9/L1VLGHY0ApKDQ8JGE0GrYgEg162hbhoxEHkjjoHMhDUfV6Pj8
 NkqcjjWl11UUhgkNqrGafayXbBVnOiEglxy8uXCeq14y9Xd/gjK9Fz6MQvRSOjms
 PFmaKknhdmpxh0DuZmTix7WBmKim8zOiCE0/vrAPvwx5L+d1bn5xh6yQvtVjBMpU
 Sru3Mhdm9bL9dUDBgOM/G6WCxSTVLBlExOblcYkQh03MfabD7bfplcrKYPXt5ull
 Y8YLjqkoIfoy5t0ErvtlpdBJjeEz99JXU+wLQ6NYHnzwzTV+oUtSaEph14mAFOcY
 XkFKdoPDI9PnyEfvy4193du8z/dSbhu7sWgHWbTCQyrcaNnSaVhlH43NUC+p23YN
 8vfEsVLd1X7MFkDBUmWp
 =M+/m
 -----END PGP SIGNATURE-----

Merge remote-tracking branch 'remotes/bonzini/tags/for-upstream' into staging

SCSI changes that enable sending vendor-specific commands via virtio-scsi.

Memory changes for QOMification and automatic tracking of MR lifetime.

# gpg: Signature made Mon 18 Aug 2014 13:03:09 BST using RSA key ID 9B4D86F2
# gpg: Good signature from "Paolo Bonzini <pbonzini@redhat.com>"
# gpg:                 aka "Paolo Bonzini <bonzini@gnu.org>"

* remotes/bonzini/tags/for-upstream:
  mtree: remove write-only field
  memory: Use canonical path component as the name
  memory: Use memory_region_name for name access
  memory: constify memory_region_name
  exec: Abstract away ref to memory region names
  loader: Abstract away ref to memory region names
  tpm_tis: remove instance_finalize callback
  memory: remove memory_region_destroy
  memory: convert memory_region_destroy to object_unparent
  ioport: split deletion and destruction
  nic: do not destroy memory regions in cleanup functions
  vga: do not dynamically allocate chain4_alias
  sysbus: remove unused function sysbus_del_io
  qom: object: move unparenting to the child property's release callback
  qom: object: delete properties before calling instance_finalize
  virtio-scsi: implement parse_cdb
  scsi-block, scsi-generic: implement parse_cdb
  scsi-block: extract scsi_block_is_passthrough
  scsi-bus: introduce parse_cdb in SCSIDeviceClass and SCSIBusInfo
  scsi-bus: prepare scsi_req_new for introduction of parse_cdb

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-08-19 13:00:57 +01:00
Amit Shah
d0a0bfe672 virtio-serial: search for duplicate port names before adding new ports
Before adding new ports to VirtIOSerial devices, check if there's a
conflict in the 'name' parameter.  This ensures two virtserialports with
identical names are not initialized.

Reported-by: <mazhang@redhat.com>
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
2014-08-18 22:42:49 +05:30
Amit Shah
a1857ad1ac virtio-serial: create a linked list of all active devices
To ensure two virtserialports don't get added to the system with the
same 'name' parameter, we need to access all the ports on all the
devices added, and compare the names.

We currently don't have a list of all VirtIOSerial devices added to the
system.  This commit adds a simple linked list in which devices are put
when they're initialized, and removed when they go away.

Signed-off-by: Amit Shah <amit.shah@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
2014-08-18 22:42:37 +05:30
Paolo Bonzini
469b046ead memory: remove memory_region_destroy
The function is empty after the previous patch, so remove it.

Reviewed-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-08-18 12:06:21 +02:00
KONRAD Frederic
af52fe862f cadence_uart: check for serial backend before using it.
This checks that s->chr is not NULL before using it.

Signed-off-by: KONRAD Frederic <fred.konrad@greensocs.com>
Reviewed-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-07-17 16:36:17 +01:00
Amit Shah
57d84cf353 virtio-serial-bus: keep port 0 reserved for virtconsole even on unplug
We keep port 0 reserved for compat with older guests, where only
virtio-console was expected.  Even if a system is started without a
virtio-console port, port #0 is kept aside.  However, after a
virtconsole port is unplugged, port id 0 became available, and the next
hotplug of a virtserialport caused failure due to it not being a console
port.

Steps to reproduce:

$ ./x86_64-softmmu/qemu-system-x86_64 -m 512 -cpu host -enable-kvm -device virtio-serial-pci -monitor stdio  -vnc :1
QEMU 2.0.91 monitor - type 'help' for more information
(qemu) device_add virtconsole,id=p1
(qemu) device_del p1
(qemu) device_add virtserialport,id=p1
Port number 0 on virtio-serial devices reserved for virtconsole devices for backward compatibility.
Device 'virtserialport' could not be initialized
(qemu) quit

Reported-by: dengmin <mdeng@redhat.com>
Reviewed-by: Amos Kong <akong@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Amit Shah <amit.shah@redhat.com>
2014-07-16 14:32:40 +05:30
Paolo Bonzini
7497bce6c2 serial-pci: remove memory regions from BAR before destroying them
Otherwise, hot-unplug of pci-serial-2x trips the assertion
in memory_region_destroy:

    (qemu) device_del gg
    (qemu) qemu-system-x86_64: /work/armbru/tmp/qemu/memory.c:1021: memory_region_destroy: Assertion `((&mr->subregions)->tqh_first == ((void *)0))' failed.
    Aborted (core dumped)

Reported-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-07-14 16:14:15 +02:00
Kirill Batuzov
f702e62a19 serial: change retry logic to avoid concurrency
Whenever serial_xmit fails to transmit a byte it adds a watch that would
call it again when the "line" becomes ready. This results in a retry
chain:
  serial_xmit -> add_watch -> serial_xmit
Each chain is able to transmit one character, and for every character
passed to serial by the guest driver a new chain is spawned.

The problem lays with the fact that a new chain is spawned even when
there is one already waiting on the watch. So there can be several retry
chains waiting concurrently on one "line". Every chain tries to transmit
current character, so character order is not messed up. But also every
chain increases retry counter (tsr_retry). If there are enough
concurrent chains this counter will hit MAX_XMIT_RETRY value and
the character will be dropped.

To reproduce this bug you need to feed serial output to some program
consuming it slowly enough. A python script from bug #1335444
description is an example of such program.

This commit changes retry logic in the following way to avoid
concurrency: instead of spawning a new chain for each character being
transmitted spawn only one and make it transmit characters until FIFO is
empty.

The change consists of two parts:
 - add a do {} while () loop in serial_xmit (diff is a bit erratic
   for this part, diff -w will show actual change),
 - do not call serial_xmit from serial_ioport_write if there is one
   waiting on the watch already.

This should fix another issue causing bug #1335444.

Signed-off-by: Kirill Batuzov <batuzovk@ispras.ru>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-07-14 16:14:14 +02:00
Peter Crosthwaite
f173d57a4c irq: Allocate IRQs individually
Allocate each IRQ individually on array allocations. This prepares for
QOMification of IRQs, where pointers to individual IRQs may be taken
and handed around for usage as QOM Links. The g_renew() scheme used here
is too fragile and would break all existing links should an IRQ list
be extended.

We now have to pass the IRQ count to qemu_free_irqs(). We have so few
call sites however, so this change is reasonably trivial.

Cc: agarcia@igalia.com
Cc: mst@redhat.com
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Acked-by: Alberto Garcia <agarcia@igalia.com>
Signed-off-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
2014-07-01 04:02:53 +02:00
Roger Pau Monne
e02bc6de30 serial: poll the serial console with G_IO_HUP
On FreeBSD polling a master pty while the other end is not connected
with G_IO_OUT only results in an endless wait. This is different from
the Linux behaviour, that returns immediately. In order to demonstrate
this, I have the following example code:

http://xenbits.xen.org/people/royger/test_poll.c

When executed on Linux:

$ ./test_poll
In callback

On FreeBSD instead, the callback never gets called:

$ ./test_poll

So, in order to workaround this, poll the source with G_IO_HUP (which
makes the code behave the same way on both Linux and FreeBSD).

Signed-off-by: Roger Pau Monné <roger.pau@citrix.com>
Cc: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
Cc: Michael Tokarev <mjt@tls.msk.ru>
Cc: "Andreas Färber" <afaerber@suse.de>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: xen-devel@lists.xenproject.org
[Add hw/char/cadence_uart.c too. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-06-30 15:04:34 +02:00
Rusty Russell
e0ab7fac65 virtio-serial-bus: use virtio wrappers to access headers
We also fix max_nr_ports at reset time as the device endianness may have
changed.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Reviewed-by: Anthony Liguori <aliguori@us.ibm.com>
[ pass VirtIODevice * to memory accessors,
  fix max_nr_ports at reset time,
  Greg Kurz <gkurz@linux.vnet.ibm.com> ]
Signed-off-by: Greg Kurz <gkurz@linux.vnet.ibm.com>
Reviewed-by: Alexander Graf <agraf@suse.de>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2014-06-29 19:39:43 +03:00
Greg Kurz
13c6855ab0 virtio-serial: implement per-device migration calls
Signed-off-by: Greg Kurz <gkurz@linux.vnet.ibm.com>
Reviewed-by: Alexander Graf <agraf@suse.de>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2014-06-29 19:39:41 +03:00
Greg Kurz
1b5fc0dea4 virtio: introduce device specific migration calls
In order to migrate virtio subsections, they should be streamed after
the device itself. We need the device specific code to be called from
the common migration code to achieve this. This patch introduces load
and save methods for this purpose.

Suggested-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Greg Kurz <gkurz@linux.vnet.ibm.com>
Reviewed-by: Alexander Graf <agraf@suse.de>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2014-06-29 19:39:41 +03:00
Alexander Graf
e38e943a1f virtio-serial: don't migrate the config space
The device configuration is set at realize time and never changes. It
should not be migrated as it is done today. For the sake of compatibility,
let's just skip them at load time.

Signed-off-by: Alexander Graf <agraf@suse.de>
[ added missing casts to uint16_t *,
  added From, SoB and commit message,
  Greg Kurz <gkurz@linux.vnet.ibm.com> ]
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Greg Kurz <gkurz@linux.vnet.ibm.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2014-06-29 19:39:41 +03:00
Laszlo Ersek
e2ae6159de virtio-serial: report frontend connection state via monitor
Libvirt wants to know about the guest-side connection state of some
virtio-serial ports (in particular the one(s) assigned to guest agent(s)).
Report such states with a new monitor event.

RHBZ: https://bugzilla.redhat.com/show_bug.cgi?id=1080376
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
2014-06-27 09:33:27 -04:00
Paolo Bonzini
10358b6a1c virtio-serial: remove useless set_config function
Its only contents are a dead memcpy.  Since it is optional,
drop the function altogether.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2014-06-24 20:01:24 +04:00
Juan Quintela
d49805aeea savevm: Remove all the unneeded version_minimum_id_old (x86)
After previous Peter patch, they are redundant.  This way we don't
assign them except when needed.  Once there, there were lots of case
where the ".fields" indentation was wrong:

     .fields = (VMStateField []) {
and
     .fields =      (VMStateField []) {

Change all the combinations to:

     .fields = (VMStateField[]){

The biggest problem (appart from aesthetics) was that checkpatch complained
when we copy&pasted the code from one place to another.

Signed-off-by: Juan Quintela <quintela@redhat.com>
Acked-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
2014-06-16 04:55:26 +02:00
Juan Quintela
3aff6c2fea savevm: Remove all the unneeded version_minimum_id_old (ppc)
After previous Peter patch, they are redundant.  This way we don't
assign them except when needed.  Once there, there were lots of case
where the ".fields" indentation was wrong:

     .fields = (VMStateField []) {
and
     .fields =      (VMStateField []) {

Change all the combinations to:

     .fields = (VMStateField[]){

The biggest problem (appart from aesthetics) was that checkpatch complained
when we copy&pasted the code from one place to another.

Signed-off-by: Juan Quintela <quintela@redhat.com>
Acked-by: Alexey Kardashevskiy <aik@ozlabs.ru>
2014-06-16 04:55:26 +02:00
Peter Crosthwaite
aa0f607f61 char: xilinx_uartlite: Convert to realize()
SysBusDevice::init is depracated. Convert to Object::init and
Device::realize as prescribed by QOM conventions.

Signed-off-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
2014-06-09 00:33:03 +02:00
Peter Crosthwaite
95faaa73df char: xilinx_uartlite: Don't reset from init
This refresh of the device state is intended to be a reset side
effect. Move it to a proper reset handler rather than do it at
init time.

Signed-off-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
2014-06-09 00:33:03 +02:00
BALATON Zoltan
13cc2c3e86 serial-pci: Set prog interface field of pci config to 16550 compatible
Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Gerd Hoffmann <kraxel@redhat.com>
2014-05-21 15:47:50 +03:00
Gerd Hoffmann
59e7a13005 input: sparc32 kbd: claim en-us layout
Reported-by: Olivier Danet <odanet@caramail.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2014-05-16 08:30:12 +02:00
Gerd Hoffmann
97256073b1 input: sparc32 kbd: fix some key mappings
Reported-by: Olivier Danet <odanet@caramail.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2014-05-16 08:30:12 +02:00
Gerd Hoffmann
65e7545ea3 input: switch sparc32 kbd to new input api
Nasty 0xe0 logic is gone.  We map through QKeyCode now, giving us a
nice, readable mapping table.

Quick smoke test in OpenFirmware looks ok.  Careful check from arch
maintainers would be very nice, especially on the capslock and numlock
logic.  I'm not fully sure whenever I got it translated correctly and
also what it is supposed to do in the first place ...

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2014-05-16 08:30:12 +02:00
Peter Maydell
895527eea5 migration/next for 20140515
-----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1
 
 iQIcBAABCAAGBQJTdBkpAAoJEPSH7xhYctcj5jAQAJKiJ/43TBk0S0wlpoPjw1yA
 WSC/oJ2yvf+i6EndJPdnxIA/3K3s7suRFBJVYwLVnGJTUZ6gwGcI7cc/EX/iK0vf
 1Ffv/RAuh3nkohFw1ZMLQGqACFskSer0K1wZgQg+YjiJRPzzpVOpaAVm3+c04LRN
 AjO9LTqudi2pFaDHfGQMFES3j/5+h2srdad7YLMu4h/17SLtcowO7Yf7GT+GHRyD
 c3OHcL6vNoCKkIJQULC8X5czh6zapQZG3SRZ/nLt58yjEyVuq4L2cNRA/614K+5b
 1YLz4dX6slj8y17tg8On60emU0Sdu4mOws9HtYSytfmEu045iuF+Wr4kNjO74UGd
 NnnjD1pdnuF7356pz87PiVBf7qer5yrv+Bog1KRUwn3ETFqpSOMiKJo0JAGBMKdN
 w6Mbkg9C7IR62OfmM5157Mj2Xd681GImNiYzerBMfuFAWk5XsMxuz9Xh03I7WpzS
 ASow6SCBIr7bsiKENV7twuz1mIQclsYWXaVt8ldH8bMsTCqiefVeDs4o6A3Na+WC
 LztUHzlhVLZU92uJDiIsyQnwmsw032RjhKY9sV/NMa5HLAhF/zZLcn1OfXshrv8t
 mVnWngGbY185kml0GmLu9TSnSCBSD8lcwZlRA9JVyxfusxElJUOrQzKzvu69Rn6U
 XBWPBwppnDQ0MjOgSZD+
 =gg8m
 -----END PGP SIGNATURE-----

Merge remote-tracking branch 'remotes/juanquintela/tags/migration/20140515' into staging

migration/next for 20140515

# gpg: Signature made Thu 15 May 2014 02:32:25 BST using RSA key ID 5872D723
# gpg: Can't check signature: public key not found

* remotes/juanquintela/tags/migration/20140515:
  usb: fix up post load checks
  migration: show average throughput when migration finishes
  savevm: Remove all the unneeded version_minimum_id_old (rest)
  savevm: Remove all the unneeded version_minimum_id_old (usb)
  Split ram_save_block
  arch_init: Simplify code for load_xbzrle()

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-05-15 17:29:03 +01:00
Juan Quintela
35d08458a9 savevm: Remove all the unneeded version_minimum_id_old (rest)
After previous Peter patch, they are redundant.  This way we don't
assign them except when needed.  Once there, there were lots of case
where the ".fields" indentation was wrong:

     .fields = (VMStateField []) {
and
     .fields =      (VMStateField []) {

Change all the combinations to:

     .fields = (VMStateField[]){

The biggest problem (appart from aesthetics) was that checkpatch complained
when we copy&pasted the code from one place to another.

Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
2014-05-14 15:24:51 +02:00
Juan Quintela
8f1e884b38 savevm: Remove all the unneeded version_minimum_id_old (arm)
After commit 767adce2d, they are redundant.  This way we don't assign them
except when needed.  Once there, there were lots of cases where the ".fields"
indentation was wrong:

     .fields = (VMStateField []) {
and
     .fields =      (VMStateField []) {

Change all the combinations to:

     .fields = (VMStateField[]){

The biggest problem (apart from aesthetics) was that checkpatch complained
when we copy&pasted the code from one place to another.

Signed-off-by: Juan Quintela <quintela@redhat.com>
[PMM: fixed minor conflict, corrected commit message typos]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-05-13 16:09:35 +01:00
Don Slutz
dffacd4654 char/serial: Fix emptyness handling
The commit 88c1ee73d3
char/serial: Fix emptyness check

Still causes extra NULL byte(s) to be sent.

So if the fifo is empty, do not send an extra NULL byte.

Reviewed-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
Signed-off-by: Don Slutz <dslutz@verizon.com>
Message-id: 1395160174-16006-1-git-send-email-dslutz@verizon.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-04-07 14:51:32 +01:00
Rob Herring
f72dbf3d26 pl011: fix incorrect logic to set the RXFF flag
The receive fifo full bit should be set when 1 character is received and
the fifo is disabled or when 16 characters are in the fifo.

Signed-off-by: Rob Herring <rob.herring@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 1395166721-15716-4-git-send-email-robherring2@gmail.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-03-18 19:38:56 +00:00
Rob Herring
ce8f0905a5 pl011: fix UARTRSR accesses corrupting the UARTCR value
Offset 4 is UARTRSR/UARTECR, not the UARTCR. The UARTCR would be
corrupted if the UARTRSR is ever written. Fix by implementing a correct
model of the UARTRSR/UARTECR register. Reads of this register simply
reflect the error bits in data register. Only breaks can be triggered in
QEMU. With the pl011_can_receive function, we effectively have flow
control between the host and the model. Framing and parity errors simply
don't make sense in the model and will never occur.

Signed-off-by: Rob Herring <rob.herring@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 1395166721-15716-3-git-send-email-robherring2@gmail.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-03-18 19:38:55 +00:00
Rob Herring
22709e90a2 pl011: reset the fifo when enabled or disabled
Intermittent issues have been seen where no serial input occurs. It
appears the pl011 gets in a state where the rx interrupt never fires
because the rx interrupt only asserts when crossing the fifo trigger
level. The fifo state appears to get out of sync when the pl011 is
re-configured. This combined with the rx timeout interrupt not being
modeled results in no more rx interrupts.

Disabling the fifo is the recommended way to clear the tx fifo in the
TRM (section 3.3.8). The behavior in this case for the rx fifo is
undefined in the TRM, but having fifo contents to be maintained during
configuration changes is not likely expected behavior. Reseting the
fifo state when the fifo size is changed is the simplest solution.

Signed-off-by: Rob Herring <rob.herring@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 1395166721-15716-2-git-send-email-robherring2@gmail.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-03-18 19:36:49 +00:00
Christian Borntraeger
4f3ed190a6 s390x/sclpconsole-lm: Fix and simplify irq setup
valgrind complains about a memory leak in irq setup of sclpconsole:

==42117== 8 bytes in 1 blocks are definitely lost in loss record 89of 833
==42117==    at 0x4031AFE: malloc (vg_replace_malloc.c:292)
==42117==    by 0x8022F855: malloc_and_trace (vl.c:2715)
==42117==    by 0x4145569: g_malloc (in /usr/lib64/libglib-2.0.so.0.3400.2)
==42117==    by 0x800F696D: qemu_extend_irqs (irq.c:51)
==42117==    by 0x800F6AF7: qemu_allocate_irqs (irq.c:68)
==42117==    by 0x800F5685: console_init (sclpconsole.c:235)
==42117==    by 0x80297C79: event_realize (event-facility.c:386)
==42117==    by 0x80105071: device_set_realized (qdev.c:693)
==42117==    by 0x801CDC4B: property_set_bool (object.c:1337)
 ==42117==    by 0x801CBD7F: object_property_set (object.c:819)
[...]

We dont need the indirection of an qemu irq to inject an slcp interrupt.
Fixes a valgrind error and makes the code simpler.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Acked-by: Heinz Graalfs <graalfs@linux.vnet.ibm.com>
2014-03-17 22:01:19 +01:00
Christian Borntraeger
b074e62205 s390x/sclpconsole: Fix and simplify interrupt injection
valgrind complains about a memory leak in irq setup of sclpconsole:

==42117== 8 bytes in 1 blocks are definitely lost in loss record 89 of 833
==42117==    at 0x4031AFE: malloc (vg_replace_malloc.c:292)
==42117==    by 0x8022F855: malloc_and_trace (vl.c:2715)
==42117==    by 0x4145569: g_malloc (in /usr/lib64/libglib-2.0.so.0.3400.2)
==42117==    by 0x800F696D: qemu_extend_irqs (irq.c:51)
==42117==    by 0x800F6AF7: qemu_allocate_irqs (irq.c:68)
==42117==    by 0x800F5685: console_init (sclpconsole.c:235)
==42117==    by 0x80297C79: event_realize (event-facility.c:386)
==42117==    by 0x80105071: device_set_realized (qdev.c:693)
==42117==    by 0x801CDC4B: property_set_bool (object.c:1337)
==42117==    by 0x801CBD7F: object_property_set (object.c:819)
[...]

Turns out that we actually dont need the indirection, so trigger the
sclp interrupt directly.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Acked-by: Heinz Graalfs <graalfs@linux.vnet.ibm.com>
2014-03-17 22:01:19 +01:00
Andreas Färber
be21c33616 virtio-console: Fix VIRTIO_CONSOLE() cast macro
Commit 0399a3819b (virtio-console: QOM
cast cleanup for VirtConsole) broke virtserialport since it shares
functions and state struct with virtconsole. Let virtconsole inherit
from virtserialport, and use virtserialport type for casting.

Note that virtio-serial-port is the abstract base type in
virtio-serial-bus.c, whereas virtserialport is the user-instantiatable
type in virtio-console.c. Therefore using TYPE_VIRTIO_CONSOLE_SERIAL_PORT.

Reported-by: Richard W.M. Jones <rjones@redhat.com>
Acked-by: Richard W.M. Jones <rjones@redhat.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
2014-03-13 21:12:07 +01:00
Andreas Färber
2ef66625f3 virtio-serial-port: Convert to QOM realize/unrealize
Signed-off-by: Andreas Färber <afaerber@suse.de>
2014-03-13 01:21:57 +01:00
Andreas Färber
0399a3819b virtio-console: QOM cast cleanup for VirtConsole
Introduce type constant, cast macro and rename parent field.

Signed-off-by: Andreas Färber <afaerber@suse.de>
2014-03-13 01:21:57 +01:00