sdk/emulator/qemu.git
10 years agotarget-tricore: Add instructions of SSR opcode format
Bastian Koppelmann [Mon, 1 Sep 2014 11:59:53 +0000 (12:59 +0100)]
target-tricore: Add instructions of SSR opcode format

Add instructions of SSR opcode format.

Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Message-id: 1409572800-4116-9-git-send-email-kbastian@mail.uni-paderborn.de
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
10 years agotarget-tricore: Add instructions of SRR opcode format
Bastian Koppelmann [Mon, 1 Sep 2014 11:59:52 +0000 (12:59 +0100)]
target-tricore: Add instructions of SRR opcode format

Add instructions of SRR opcode format.
Add helper for add/sub_ssov.

Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Message-id: 1409572800-4116-8-git-send-email-kbastian@mail.uni-paderborn.de
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
10 years agotarget-tricore: Add instructions of SRC opcode format
Bastian Koppelmann [Mon, 1 Sep 2014 11:59:51 +0000 (12:59 +0100)]
target-tricore: Add instructions of SRC opcode format

Add instructions of SRC opcode format.
Add micro-op generator functions for add, conditional add/sub and shi/shai.

Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Message-id: 1409572800-4116-7-git-send-email-kbastian@mail.uni-paderborn.de
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
10 years agotarget-tricore: Add masks and opcodes for decoding
Bastian Koppelmann [Mon, 1 Sep 2014 11:59:50 +0000 (12:59 +0100)]
target-tricore: Add masks and opcodes for decoding

Add masks and opcodes for decoding TriCore instructions.

Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Message-id: 1409572800-4116-6-git-send-email-kbastian@mail.uni-paderborn.de
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
10 years agotarget-tricore: Add initialization for translation and activate target
Bastian Koppelmann [Mon, 1 Sep 2014 11:59:49 +0000 (12:59 +0100)]
target-tricore: Add initialization for translation and activate target

Add tcg and cpu model initialization.
Add gen_intermediate_code function.
Activate target in configure and add softmmu config.

Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Message-id: 1409572800-4116-5-git-send-email-kbastian@mail.uni-paderborn.de
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
10 years agotarget-tricore: Add softmmu support
Bastian Koppelmann [Mon, 1 Sep 2014 11:59:48 +0000 (12:59 +0100)]
target-tricore: Add softmmu support

Add basic softmmu support for TriCore

Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Message-id: 1409572800-4116-4-git-send-email-kbastian@mail.uni-paderborn.de
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
10 years agotarget-tricore: Add board for systemmode
Bastian Koppelmann [Mon, 1 Sep 2014 11:59:47 +0000 (12:59 +0100)]
target-tricore: Add board for systemmode

Add basic board to allow systemmode emulation

Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Message-id: 1409572800-4116-3-git-send-email-kbastian@mail.uni-paderborn.de
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
10 years agotarget-tricore: Add target stubs and qom-cpu
Bastian Koppelmann [Mon, 1 Sep 2014 11:59:46 +0000 (12:59 +0100)]
target-tricore: Add target stubs and qom-cpu

Add TriCore target stubs, and QOM cpu, and Maintainer

Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Message-id: 1409572800-4116-2-git-send-email-kbastian@mail.uni-paderborn.de
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
10 years agoMerge remote-tracking branch 'remotes/borntraeger/tags/kvm-s390-20140901' into staging
Peter Maydell [Mon, 1 Sep 2014 12:57:45 +0000 (13:57 +0100)]
Merge remote-tracking branch 'remotes/borntraeger/tags/kvm-s390-20140901' into staging

s390x/kvm: Several updates/fixes/features

1. s390x/kvm: avoid synchronize_rcu's in kernel
----------------------------------------------
The first patches change s390x/kvm code to issue VCPU specific ioctls
from the VCPU thread. This will avoid unnecessary synchronize_rcu in
the kernel, which caused a noticably slowdown with many guest CPUs.
It speeds up all start/restart/reset operations involving cpus
drastically.

2. s390-ccw.img: block size and DASD format support
---------------------------------------------------
The second part changes the s390-ccw bios to IPL (boot)  more disk
formats than before. Furthermore a small fix is made to the console
output of the bios.

3. s390: Support for Hotplug of Standby Memory
----------------------------------------------
The third part adds support in s390 for a pool of standby memory,
which can be set online/offline by the guest (ie, via chmem).
The standby pool of memory is allocated as the difference between
the initial memory setting and the maxmem setting.
As part of this work, additional results are provided for the
Read SCP Information SCLP, and new implentation is added for the
Read Storage Element Information, Attach Storage Element,
Assign Storage and Unassign Storage SCLPs, which enables the s390
guest to manipulate the standby memory pool.

This patchset is based on work originally done by Jeng-Fang (Nick)
Wang.

Sample qemu command snippet:

qemu -machine s390-ccw-virtio  -m 1024M,maxmem=2048M,slots=32 -enable-kvm

This will allocate 1024M of active memory, and another 1024M
of standby memory.  Example output from s390-tools lsmem:
=============================================================================
0x0000000000000000-0x000000000fffffff        256  online   no         0-127
0x0000000010000000-0x000000001fffffff        256  online   yes        128-255
0x0000000020000000-0x000000003fffffff        512  online   no         256-511
0x0000000040000000-0x000000007fffffff       1024  offline  -          512-1023

Memory device size  : 2 MB
Memory block size   : 256 MB
Total online memory : 1024 MB
Total offline memory: 1024 MB

The guest can dynamically enable part or all of the standby pool
via the s390-tools chmem, for example:

chmem -e 512M

And can attempt to dynamically disable:

chmem -d 512M

4. s390x/gdb: various fixes
---------------------------
* Patch 1 fixes a bug where the cc was changed accidentally.
* Patch 2 adds the gdb feature XML files for s390x
* Patch 3 Define acr and fpr registers as coprocessor registers. This allows us
   to reuse the feature XML files.
* Patch 4 whitespace fixes

# gpg: Signature made Mon 01 Sep 2014 12:53:39 BST using RSA key ID B5A61C7C
# gpg: Can't check signature: public key not found

* remotes/borntraeger/tags/kvm-s390-20140901:
  s390x/gdb: coding style fixes
  s390x/gdb: generate target.xml and handle fp/ac as coprocessors
  s390x/gdb: add the feature xml files for s390x
  s390x/gdb: don't touch the cc if tcg is not enabled
  sclp-s390: Add memory hotplug SCLPs
  s390-virtio: Apply same memory boundaries as virtio-ccw
  virtio-ccw: Include standby memory when calculating storage increment
  sclp-s390: Add device to manage s390 memory hotplug
  pc-bios/s390-ccw.img binary update
  pc-bios/s390-ccw: Do proper console setup
  pc-bios/s390-ccw: IPL from DASD with format variations
  pc-bios/s390-ccw Really big EAV ECKD DASD handling
  pc-bios/s390-ccw Improve ECKD informational message
  pc-bios/s390-ccw: handle more ECKD DASD block sizes
  pc-bios/s390-ccw: support all virtio block size
  s390x/kvm: execute the first cpu reset on the vcpu thread
  s390x/kvm: execute "system reset" cpu resets on the vcpu thread
  s390x/kvm: execute sigp orders on the target vcpu thread
  s390x/kvm: run guest triggered resets on the target vcpu thread

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
10 years agos390x/gdb: coding style fixes
David Hildenbrand [Fri, 29 Aug 2014 13:52:17 +0000 (15:52 +0200)]
s390x/gdb: coding style fixes

This patch cleanes up two coding style issues (missing whitespaces).

Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
10 years agos390x/gdb: generate target.xml and handle fp/ac as coprocessors
David Hildenbrand [Fri, 29 Aug 2014 13:52:16 +0000 (15:52 +0200)]
s390x/gdb: generate target.xml and handle fp/ac as coprocessors

This patch reduces the core registers to the psw and the general purpose
registers. The fpc and ac registers are handled as coprocessors registers by gdb.
This allows to reuse the feature xml files taken from gdb without further
modification and is what other architectures do.

The target.xml is now generated and provided to the gdb client. Therefore, the
client doesn't have to guess which registers are available at which logical
register number.

Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
10 years agos390x/gdb: add the feature xml files for s390x
David Hildenbrand [Fri, 29 Aug 2014 13:52:15 +0000 (15:52 +0200)]
s390x/gdb: add the feature xml files for s390x

This patch adds the relevant s390x feature xml files taken from gdb.

Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
10 years agos390x/gdb: don't touch the cc if tcg is not enabled
David Hildenbrand [Fri, 29 Aug 2014 13:52:14 +0000 (15:52 +0200)]
s390x/gdb: don't touch the cc if tcg is not enabled

When reading/writing the psw mask, the condition code may only be touched if
running on tcg.

Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
10 years agosclp-s390: Add memory hotplug SCLPs
Matthew Rosato [Thu, 28 Aug 2014 15:25:35 +0000 (11:25 -0400)]
sclp-s390: Add memory hotplug SCLPs

Add memory information to read SCP info and add handlers for
Read Storage Element Information, Attach Storage Element,
Assign Storage and Unassign Storage.

Signed-off-by: Matthew Rosato <mjrosato@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
10 years agos390-virtio: Apply same memory boundaries as virtio-ccw
Matthew Rosato [Thu, 28 Aug 2014 15:25:34 +0000 (11:25 -0400)]
s390-virtio: Apply same memory boundaries as virtio-ccw

Although s390-virtio won't support memory hotplug, it should
enforce the same memory boundaries so that it can use shared codepaths
(like read_SCP_info).

Signed-off-by: Matthew Rosato <mjrosato@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
10 years agovirtio-ccw: Include standby memory when calculating storage increment
Matthew Rosato [Thu, 28 Aug 2014 15:25:33 +0000 (11:25 -0400)]
virtio-ccw: Include standby memory when calculating storage increment

When determining the memory increment size, use the maxmem size if
it was specified.

Signed-off-by: Matthew Rosato <mjrosato@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
10 years agosclp-s390: Add device to manage s390 memory hotplug
Matthew Rosato [Thu, 28 Aug 2014 15:25:32 +0000 (11:25 -0400)]
sclp-s390: Add device to manage s390 memory hotplug

Add sclpMemoryHotplugDev to contain associated data structures, etc.

Signed-off-by: Matthew Rosato <mjrosato@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
10 years agopc-bios/s390-ccw.img binary update
Eugene (jno) Dvurechenski [Fri, 29 Aug 2014 09:01:42 +0000 (11:01 +0200)]
pc-bios/s390-ccw.img binary update

Rebuild of s390-ccw.img containing these patches:

  pc-bios/s390-ccw: Do proper console setup
  pc-bios/s390-ccw: support all virtio block size
  pc-bios/s390-ccw: handle more ECKD DASD block sizes
  pc-bios/s390-ccw Improve ECKD informational message
  pc-bios/s390-ccw Really big EAV ECKD DASD handling
  pc-bios/s390-ccw: IPL from DASD with format variations

Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
10 years agopc-bios/s390-ccw: Do proper console setup
Christian Borntraeger [Fri, 29 Aug 2014 09:01:41 +0000 (11:01 +0200)]
pc-bios/s390-ccw: Do proper console setup

The final newline/return must happen before we reset the sclp via
diag 308.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
10 years agopc-bios/s390-ccw: IPL from DASD with format variations
Eugene (jno) Dvurechenski [Fri, 29 Aug 2014 09:01:40 +0000 (11:01 +0200)]
pc-bios/s390-ccw: IPL from DASD with format variations

There are two known cases of DASD format where signatures are
incomplete or absent:

1. result of <dasdfmt -d ldl -L ...> (ECKD_LDL_UNLABELED)
2. CDL with zero keys in IPL1 and IPL2 records

Now the code attempts to
1. find zIPL and use SCSI layout
2. find IPL1 and use CDL layout
3. find CMS1 and use LDL layout
3. find LNX1 and use LDL layout
4. find zIPL and use unlabeled LDL layout
5. find zIPL and use CDL layout
6. die
in this sequence.

Signed-off-by: Eugene (jno) Dvurechenski <jno@linux.vnet.ibm.com>
Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
10 years agopc-bios/s390-ccw Really big EAV ECKD DASD handling
Eugene (jno) Dvurechenski [Fri, 29 Aug 2014 09:01:39 +0000 (11:01 +0200)]
pc-bios/s390-ccw Really big EAV ECKD DASD handling

For EAV ECKD DASD, the cylinder count will have the magic value
0xfffeU. Therefore, use the block number to test for valid eckd
addresses instead.

Signed-off-by: Eugene (jno) Dvurechenski <jno@linux.vnet.ibm.com>
Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
10 years agopc-bios/s390-ccw Improve ECKD informational message
Eugene (jno) Dvurechenski [Fri, 29 Aug 2014 09:01:38 +0000 (11:01 +0200)]
pc-bios/s390-ccw Improve ECKD informational message

Add block size display to ECKD scheme report.

Signed-off-by: Eugene (jno) Dvurechenski <jno@linux.vnet.ibm.com>
Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
10 years agopc-bios/s390-ccw: handle more ECKD DASD block sizes
Eugene (jno) Dvurechenski [Fri, 29 Aug 2014 09:01:37 +0000 (11:01 +0200)]
pc-bios/s390-ccw: handle more ECKD DASD block sizes

Using dasdfmt(8) to format a DASD allows to choose a block size.
There are four supported values: 512, 1024, 2048, and 4096 bytes
per block. Each block size leads to selection of new count of
sectors per track. The head count remains always the same: 15.

This empiric knowledge is used to detect ECKD DASD to IPL from.

Signed-off-by: Eugene (jno) Dvurechenski <jno@linux.vnet.ibm.com>
Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
10 years agopc-bios/s390-ccw: support all virtio block size
Eugene (jno) Dvurechenski [Fri, 29 Aug 2014 09:01:36 +0000 (11:01 +0200)]
pc-bios/s390-ccw: support all virtio block size

The block size value may be given "as is" OR as a base value and
a shift count (exponent). So, we have to use calculation to get
the proper number in the code.

The main expression reads as
        (blk_cfg.blk_size << blk_cfg.physical_block_exp)

E.g., various combinations between blk_size=1/physical_block_exp=12
and blk_size=4096/physical_block_exp=0 are valid for 4K blocks.

Signed-off-by: Eugene (jno) Dvurechenski <jno@linux.vnet.ibm.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
10 years agos390x/kvm: execute the first cpu reset on the vcpu thread
David Hildenbrand [Thu, 28 Aug 2014 11:58:52 +0000 (13:58 +0200)]
s390x/kvm: execute the first cpu reset on the vcpu thread

As all full cpu resets currently call into the kernel to do initial cpu reset,
let's run this reset (triggered by cpu_s390x_init()) on the proper vcpu thread.

Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
10 years agos390x/kvm: execute "system reset" cpu resets on the vcpu thread
David Hildenbrand [Thu, 28 Aug 2014 11:58:51 +0000 (13:58 +0200)]
s390x/kvm: execute "system reset" cpu resets on the vcpu thread

Let's execute resets triggered by qemu system resets on the target vcpu thread.
This will avoid synchronize_rcu's in the kernel.

Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
10 years agos390x/kvm: execute sigp orders on the target vcpu thread
David Hildenbrand [Thu, 28 Aug 2014 11:58:50 +0000 (13:58 +0200)]
s390x/kvm: execute sigp orders on the target vcpu thread

All sigp orders that can result in ioctls on the target vcpu should be executed
on the associated vcpu thread.

Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
10 years agos390x/kvm: run guest triggered resets on the target vcpu thread
David Hildenbrand [Thu, 28 Aug 2014 11:58:49 +0000 (13:58 +0200)]
s390x/kvm: run guest triggered resets on the target vcpu thread

Currently, load_normal_reset() and modified_clear_reset() as triggered
by a guest vcpu will initiate cpu resets on the current vcpu thread for
all cpus. The reset should happen on the individual vcpu thread
instead, so let's use run_on_cpu() for this.

This avoids calls to synchronize_rcu() in the kernel.

Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
10 years agoMerge remote-tracking branch 'remotes/stefanha/tags/block-pull-request' into staging
Peter Maydell [Fri, 29 Aug 2014 17:40:04 +0000 (18:40 +0100)]
Merge remote-tracking branch 'remotes/stefanha/tags/block-pull-request' into staging

Block pull request

# gpg: Signature made Fri 29 Aug 2014 17:25:58 BST using RSA key ID 81AB73C8
# gpg: Good signature from "Stefan Hajnoczi <stefanha@redhat.com>"
# gpg:                 aka "Stefan Hajnoczi <stefanha@gmail.com>"

* remotes/stefanha/tags/block-pull-request: (35 commits)
  quorum: Fix leak of opts in quorum_open
  blkverify: Fix leak of opts in blkverify_open
  nfs: Fix leak of opts in nfs_file_open
  curl: Don't deref NULL pointer in call to aio_poll.
  curl: Allow a cookie or cookies to be sent with http/https requests.
  virtio-blk: allow drive_del with dataplane
  block: acquire AioContext in do_drive_del()
  linux-aio: avoid deadlock in nested aio_poll() calls
  qemu-iotests: add multiwrite test cases
  block: fix overlapping multiwrite requests
  nbd: Follow the BDS' AIO context
  block: Add AIO context notifiers
  nbd: Drop nbd_can_read()
  sheepdog: fix a core dump while do auto-reconnecting
  aio-win32: add support for sockets
  qemu-coroutine-io: fix for Win32
  AioContext: introduce aio_prepare
  aio-win32: add aio_set_dispatching optimization
  test-aio: test timers on Windows too
  AioContext: export and use aio_dispatch
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
10 years agoquorum: Fix leak of opts in quorum_open
Fam Zheng [Thu, 28 Aug 2014 05:56:12 +0000 (13:56 +0800)]
quorum: Fix leak of opts in quorum_open

Signed-off-by: Fam Zheng <famz@redhat.com>
Reviewed-by: Benoît Canet <benoit.canet@nodalink.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
10 years agoblkverify: Fix leak of opts in blkverify_open
Fam Zheng [Thu, 28 Aug 2014 05:56:11 +0000 (13:56 +0800)]
blkverify: Fix leak of opts in blkverify_open

Signed-off-by: Fam Zheng <famz@redhat.com>
Reviewed-by: Benoît Canet <benoit.canet@nodalink.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
10 years agonfs: Fix leak of opts in nfs_file_open
Fam Zheng [Thu, 28 Aug 2014 05:56:10 +0000 (13:56 +0800)]
nfs: Fix leak of opts in nfs_file_open

Signed-off-by: Fam Zheng <famz@redhat.com>
Reviewed-by: Benoît Canet <benoit.canet@nodalink.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
10 years agocurl: Don't deref NULL pointer in call to aio_poll.
Richard W.M. Jones [Thu, 28 Aug 2014 08:04:21 +0000 (09:04 +0100)]
curl: Don't deref NULL pointer in call to aio_poll.

In commit 63f0f45f2e89b60ff8245fec81328ddfde42a303 the following
mechanical change was made:

         if (!state) {
-            qemu_aio_wait();
+            aio_poll(state->s->aio_context, true);
         }

The new code now checks if state is NULL and then dereferences it
('state->s') which is obviously incorrect.

This commit replaces state->s->aio_context with
bdrv_get_aio_context(bs), fixing this problem.  The two other hunks
are concerned with getting the BlockDriverState pointer bs to where it
is needed.

The original bug causes a segfault when using libguestfs to access a
VMware vCenter Server and doing any kind of complex read-heavy
operations.  With this commit the segfault goes away.

Signed-off-by: Richard W.M. Jones <rjones@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Benoît Canet <benoit.canet@nodalink.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
10 years agocurl: Allow a cookie or cookies to be sent with http/https requests.
Richard W.M. Jones [Fri, 29 Aug 2014 15:03:12 +0000 (16:03 +0100)]
curl: Allow a cookie or cookies to be sent with http/https requests.

In order to access VMware ESX efficiently, we need to send a session
cookie.  This patch is very simple and just allows you to send that
session cookie.  It punts on the question of how you get the session
cookie in the first place, but in practice you can just run a `curl'
command against the server and extract the cookie that way.

To use it, add file.cookie to the curl URL.  For example:

$ qemu-img info 'json: {
    "file.driver":"https",
    "file.url":"https://vcenter/folder/Windows%202003/Windows%202003-flat.vmdk?dcPath=Datacenter&dsName=datastore1",
    "file.sslverify":"off",
    "file.cookie":"vmware_soap_session=\"52a01262-bf93-ccce-d379-8dabb3e55560\""}'
image: [...]
file format: raw
virtual size: 8.0G (8589934592 bytes)
disk size: unavailable

Signed-off-by: Richard W.M. Jones <rjones@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
10 years agovirtio-blk: allow drive_del with dataplane
Stefan Hajnoczi [Mon, 18 Aug 2014 15:07:13 +0000 (16:07 +0100)]
virtio-blk: allow drive_del with dataplane

Now that drive_del acquires the AioContext we can safely allow deleting
the drive.  As with non-dataplane mode, all I/Os submitted by the guest
after drive_del will return EIO.

This patch makes hot unplug work with virtio-blk dataplane.  Previously
drive_del reported an error because the device was busy.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
10 years agoblock: acquire AioContext in do_drive_del()
Stefan Hajnoczi [Mon, 18 Aug 2014 15:07:12 +0000 (16:07 +0100)]
block: acquire AioContext in do_drive_del()

Make drive_del safe for dataplane where another thread may be running
the BlockDriverState's AioContext.

Note the assumption that AioContext's lifetime exceeds DriveInfo and
BlockDriverState.  We release AioContext after DriveInfo and
BlockDriverState are potentially freed.

This is clearly safe with the global AioContext but also with -object
iothread and implicit iothreads created by -device
virtio-blk-pci,x-data-plane=on (their lifetime is tied to DeviceState,
not BlockDriverState).

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
10 years agolinux-aio: avoid deadlock in nested aio_poll() calls
Stefan Hajnoczi [Mon, 4 Aug 2014 15:56:33 +0000 (16:56 +0100)]
linux-aio: avoid deadlock in nested aio_poll() calls

If two Linux AIO request completions are fetched in the same
io_getevents() call, QEMU will deadlock if request A's callback waits
for request B to complete using an aio_poll() loop.  This was reported
to happen with the mirror blockjob.

This patch moves completion processing into a BH and makes it resumable.
Nested event loops can resume completion processing so that request B
will complete and the deadlock will not occur.

Cc: Kevin Wolf <kwolf@redhat.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Ming Lei <ming.lei@canonical.com>
Cc: Marcin Gibuła <m.gibula@beyond.pl>
Reported-by: Marcin Gibuła <m.gibula@beyond.pl>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Tested-by: Marcin Gibuła <m.gibula@beyond.pl>
10 years agoMerge remote-tracking branch 'remotes/pmaydell/tags/pull-target-arm-20140829' into...
Peter Maydell [Fri, 29 Aug 2014 14:48:15 +0000 (15:48 +0100)]
Merge remote-tracking branch 'remotes/pmaydell/tags/pull-target-arm-20140829' into staging

target-arm queue:
 * support PMCCNTR in ARMv8
 * various GIC fixes and cleanups
 * Correct Cortex-A57 ISAR5 and AA64ISAR0 ID register values
 * Fix regression that disabled VFP for ARMv5 CPUs
 * Update to upstream VIXL 1.5

# gpg: Signature made Fri 29 Aug 2014 15:34:47 BST using RSA key ID 14360CDE
# gpg: Good signature from "Peter Maydell <peter.maydell@linaro.org>"

* remotes/pmaydell/tags/pull-target-arm-20140829:
  target-arm: Implement pmccfiltr_write function
  target-arm: Remove old code and replace with new functions
  target-arm: Implement pmccntr_sync function
  target-arm: Add arm_ccnt_enabled function
  target-arm: Implement PMCCNTR_EL0 and related registers
  arm: Implement PMCCNTR 32b read-modify-write
  target-arm: Make the ARM PMCCNTR register 64-bit
  hw/intc/arm_gic: honor target mask in gic_update()
  aarch64: raise max_cpus to 8
  arm_gic: Use GIC_NR_SGIS constant
  arm_gic: Do not force PPIs to edge-triggered mode
  arm_gic: GICD_ICFGR: Write model only for pre v1 GICs
  arm_gic: Fix read of GICD_ICFGR
  target-arm: Correct Cortex-A57 ISAR5 and AA64ISAR0 ID register values
  target-arm: Fix regression that disabled VFP for ARMv5 CPUs
  disas/libvixl: Update to upstream VIXL 1.5

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
10 years agotarget-arm: Implement pmccfiltr_write function
Alistair Francis [Fri, 29 Aug 2014 14:00:30 +0000 (15:00 +0100)]
target-arm: Implement pmccfiltr_write function

This is the function that is called when writing to the
PMCCFILTR_EL0 register

Signed-off-by: Alistair Francis <alistair.francis@xilinx.com>
Signed-off-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
Message-id: 73da3da6404855b17d5ae82975a32ff3a4dcae3d.1409025949.git.peter.crosthwaite@xilinx.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
10 years agotarget-arm: Remove old code and replace with new functions
Alistair Francis [Fri, 29 Aug 2014 14:00:30 +0000 (15:00 +0100)]
target-arm: Remove old code and replace with new functions

Remove the old PMCCNTR code and replace it with calls to the new
pmccntr_sync() and arm_ccnt_enabled() functions.

Signed-off-by: Alistair Francis <alistair.francis@xilinx.com>
Signed-off-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
Message-id: 693a6e437d915c2195fd3dc7303f384ca538b7bf.1409025949.git.peter.crosthwaite@xilinx.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
10 years agotarget-arm: Implement pmccntr_sync function
Alistair Francis [Fri, 29 Aug 2014 14:00:29 +0000 (15:00 +0100)]
target-arm: Implement pmccntr_sync function

This is used to synchronise the PMCCNTR counter and swap its
state between enabled and disabled if required. It must always
be called twice, both before and after any logic that could
change the state of the PMCCNTR counter.

Signed-off-by: Alistair Francis <alistair.francis@xilinx.com>
Signed-off-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
Message-id: 62811d4c0f7b1384f7aab62ea2fcfda3dcb0db50.1409025949.git.peter.crosthwaite@xilinx.com
[PMM: fixed minor typos in pmccntr_sync doc comment]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
10 years agotarget-arm: Add arm_ccnt_enabled function
Alistair Francis [Fri, 29 Aug 2014 14:00:29 +0000 (15:00 +0100)]
target-arm: Add arm_ccnt_enabled function

Include a helper function to determine if the CCNT counter
is enabled.

Signed-off-by: Alistair Francis <alistair.francis@xilinx.com>
Signed-off-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
Message-id: e1a64f17a756e06c8bda8238ad4826d705049f7a.1409025949.git.peter.crosthwaite@xilinx.com
[ PC changes
  * Remove EL based checks
]
Signed-off-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
10 years agotarget-arm: Implement PMCCNTR_EL0 and related registers
Alistair Francis [Fri, 29 Aug 2014 14:00:29 +0000 (15:00 +0100)]
target-arm: Implement PMCCNTR_EL0 and related registers

This patch adds support for the ARMv8 version of the PMCCNTR and
related registers. It also starts to implement the PMCCFILTR_EL0
register.

Signed-off-by: Alistair Francis <alistair.francis@xilinx.com>
Signed-off-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
Message-id: b5d1094764a5416363ee95216799b394ecd011e8.1409025949.git.peter.crosthwaite@xilinx.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
10 years agoarm: Implement PMCCNTR 32b read-modify-write
Peter Crosthwaite [Fri, 29 Aug 2014 14:00:29 +0000 (15:00 +0100)]
arm: Implement PMCCNTR 32b read-modify-write

The register is now 64bit, however a 32 bit write to the register
should leave the higher bits unchanged. The open coded write handler
does not implement this, so we need to read-modify-write accordingly.

Signed-off-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
Reviewed-by: Alistair Francis <alistair23@gmail.com>
Message-id: ec350573424bb2adc1701c3b9278d26598e2f2d1.1409025949.git.peter.crosthwaite@xilinx.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
10 years agotarget-arm: Make the ARM PMCCNTR register 64-bit
Alistair Francis [Fri, 29 Aug 2014 14:00:29 +0000 (15:00 +0100)]
target-arm: Make the ARM PMCCNTR register 64-bit

This makes the PMCCNTR register 64-bit to allow for the
64-bit ARMv8 version.

Signed-off-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
Signed-off-by: Alistair Francis <alistair.francis@xilinx.com>
Message-id: 6c5bac5fd0ea54963b1fc0e7f9464909f2e19a73.1409025949.git.peter.crosthwaite@xilinx.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
10 years agohw/intc/arm_gic: honor target mask in gic_update()
Sergey Fedorov [Fri, 29 Aug 2014 14:00:29 +0000 (15:00 +0100)]
hw/intc/arm_gic: honor target mask in gic_update()

Take IRQ target mask into account when determining the highest priority
pending interrupt.

Signed-off-by: Sergey Fedorov <serge.fdrv@gmail.com>
Acked-by: Christoffer Dall <christoffer.dall@linaro.org>
Message-id: 1407947471-26981-1-git-send-email-serge.fdrv@gmail.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
10 years agoaarch64: raise max_cpus to 8
Joel Schopp [Fri, 29 Aug 2014 14:00:29 +0000 (15:00 +0100)]
aarch64: raise max_cpus to 8

I'm running on a system with 8 cpus and it would be nice to have qemu
support all of them.  The attached patch does that and has been tested.

That said, I'm not sure if 8 is enough or if we want to bump this even higher
now before systems with many more cpus come along. 255 anyone?

Cc: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Joel Schopp <joel.schopp@amd.com>
Message-id: 20140819213304.19537.2834.stgit@joelaarch64.amd.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
10 years agoarm_gic: Use GIC_NR_SGIS constant
Adam Lackorzynski [Fri, 29 Aug 2014 14:00:29 +0000 (15:00 +0100)]
arm_gic: Use GIC_NR_SGIS constant

Use constant rather than a plain number.

Acked-by: Christoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: Adam Lackorzynski <adam@os.inf.tu-dresden.de>
Message-id: 1408372255-12358-5-git-send-email-adam@os.inf.tu-dresden.de
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
10 years agoarm_gic: Do not force PPIs to edge-triggered mode
Adam Lackorzynski [Fri, 29 Aug 2014 14:00:28 +0000 (15:00 +0100)]
arm_gic: Do not force PPIs to edge-triggered mode

Only SGIs must be WI, done by forcing them to their default
(edge-triggered).

Acked-by: Christoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: Adam Lackorzynski <adam@os.inf.tu-dresden.de>
Message-id: 1408372255-12358-4-git-send-email-adam@os.inf.tu-dresden.de
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
10 years agoarm_gic: GICD_ICFGR: Write model only for pre v1 GICs
Adam Lackorzynski [Fri, 29 Aug 2014 14:00:28 +0000 (15:00 +0100)]
arm_gic: GICD_ICFGR: Write model only for pre v1 GICs

Setting the model is only available in pre-v1 GIC models.

Acked-by: Christoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: Adam Lackorzynski <adam@os.inf.tu-dresden.de>
Message-id: 1408372255-12358-3-git-send-email-adam@os.inf.tu-dresden.de
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
10 years agoarm_gic: Fix read of GICD_ICFGR
Adam Lackorzynski [Fri, 29 Aug 2014 14:00:28 +0000 (15:00 +0100)]
arm_gic: Fix read of GICD_ICFGR

The GICD_ICFGR register covers 4 interrupts per byte.

Acked-by: Christoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: Adam Lackorzynski <adam@os.inf.tu-dresden.de>
Message-id: 1408372255-12358-2-git-send-email-adam@os.inf.tu-dresden.de
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
10 years agotarget-arm: Correct Cortex-A57 ISAR5 and AA64ISAR0 ID register values
Peter Maydell [Fri, 29 Aug 2014 14:00:28 +0000 (15:00 +0100)]
target-arm: Correct Cortex-A57 ISAR5 and AA64ISAR0 ID register values

We implement the crypto extensions but were incorrectly reporting
ID register values for the Cortex-A57 which did not advertise
crypto. Use the correct values as described in the TRM.
With this fix Linux correctly detects presence of the crypto
features and advertises them in /proc/cpuinfo.

Reported-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 1408718660-7295-1-git-send-email-peter.maydell@linaro.org
Cc: qemu-stable@nongnu.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
10 years agotarget-arm: Fix regression that disabled VFP for ARMv5 CPUs
Peter Maydell [Fri, 29 Aug 2014 14:00:28 +0000 (15:00 +0100)]
target-arm: Fix regression that disabled VFP for ARMv5 CPUs

Commit 2c7ffc414 added support for honouring the CPACR coprocessor
access control register bits which may disable access to VFP
and Neon instructions. However it failed to account for the
fact that the CPACR is only present starting from the ARMv6
architecture version, so it accidentally disabled VFP completely
for ARMv5 CPUs like the ARM926. Linux would detect this as
"no VFP present" and probably fall back to its own emulation,
but other guest OSes might crash or misbehave.

This fixes bug LP:1359930.

Reported-by: Jakub Jermar <jakub@jermar.eu>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 1408714940-7192-1-git-send-email-peter.maydell@linaro.org
Cc: qemu-stable@nongnu.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
10 years agodisas/libvixl: Update to upstream VIXL 1.5
Peter Maydell [Fri, 29 Aug 2014 14:00:27 +0000 (15:00 +0100)]
disas/libvixl: Update to upstream VIXL 1.5

Update our copy of libvixl to upstream's 1.5 release.
This includes the upstream versions of the fixes we
were carrying locally (commit ffebe899).

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 1407162987-4659-1-git-send-email-peter.maydell@linaro.org

10 years agoqemu-iotests: add multiwrite test cases
Stefan Hajnoczi [Wed, 30 Jul 2014 08:53:31 +0000 (09:53 +0100)]
qemu-iotests: add multiwrite test cases

This test case covers the basic bdrv_aio_multiwrite() scenarios:
1. Single request
2. Sequential requests (AABB)
3. Superset overlapping requests (AABBAA)
4. Subset overlapping requests (BBAABB)
5. Head overlapping requests (AABB)
6. Tail overlapping requests (BBAA)
7. Disjoint requests (AA BB)

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Benoit Canet <benoit@irqsave.net>
10 years agoblock: fix overlapping multiwrite requests
Stefan Hajnoczi [Wed, 30 Jul 2014 08:53:30 +0000 (09:53 +0100)]
block: fix overlapping multiwrite requests

When request A is a strict superset of request B:

  AAAAAAAA
    BBBB

multiwrite_merge() merges them as follows:

  AABBBB

The tail of request A should have been included:

  AABBBBAA

This patch fixes data loss but this code path is probably rare.  Since
guests cannot assume ordering between in-flight requests, few
applications submit overlapping write requests.

Reported-by: Slava Pestov <sviatoslav.pestov@gmail.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Benoit Canet <benoit@irqsave.net>
10 years agoMerge remote-tracking branch 'remotes/kraxel/tags/pull-usb-20140829-1' into staging
Peter Maydell [Fri, 29 Aug 2014 12:08:04 +0000 (13:08 +0100)]
Merge remote-tracking branch 'remotes/kraxel/tags/pull-usb-20140829-1' into staging

usb: bugfix collection.
usb: add cleanup functions for host adapters,
     in preparation for hotplug support.
usb: add simple qtests for uhci,ohci,xhci.

# gpg: Signature made Fri 29 Aug 2014 12:56:20 BST using RSA key ID D3E87138
# gpg: Good signature from "Gerd Hoffmann (work) <kraxel@redhat.com>"
# gpg:                 aka "Gerd Hoffmann <gerd@kraxel.org>"
# gpg:                 aka "Gerd Hoffmann (private) <kraxel@gmail.com>"

* remotes/kraxel/tags/pull-usb-20140829-1:
  tests: add xHCI qtest
  tests: add UHCI qtest
  tests: add OHCI qtest
  usb: add usb host adapters exit trace
  usb-xhci: add exit function
  usb-ehci: add ehci-pci device exit function
  usb-ehci: add ehci unrealize funciton
  usb-ehci: add vmstate properity for EHCIState
  usb-uhci: clean up uhci resource when pci-uhci exit
  usb-ohci: add exit function
  usb-ohci: Fix memory leak for ohci timer
  usb: add usb_bus_release function
  Revert "xhci: Fix number of streams allocated when using streams"
  xhci: use (1u << i)
  Fix OHCI ISO TD state never being written back.
  xhci: fix debug print compiling error
  usb: Fix bootindex for portnr > 9

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
10 years agotests: add xHCI qtest
Gonglei [Mon, 23 Jun 2014 11:53:53 +0000 (19:53 +0800)]
tests: add xHCI qtest

Signed-off-by: Gonglei <arei.gonglei@huawei.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
10 years agotests: add UHCI qtest
Gonglei [Mon, 23 Jun 2014 11:53:52 +0000 (19:53 +0800)]
tests: add UHCI qtest

Signed-off-by: Gonglei <arei.gonglei@huawei.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
10 years agotests: add OHCI qtest
Gonglei [Mon, 23 Jun 2014 11:53:51 +0000 (19:53 +0800)]
tests: add OHCI qtest

Signed-off-by: Gonglei <arei.gonglei@huawei.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
10 years agousb: add usb host adapters exit trace
Gonglei [Wed, 4 Jun 2014 08:31:55 +0000 (16:31 +0800)]
usb: add usb host adapters exit trace

Signed-off-by: Gonglei <arei.gonglei@huawei.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
10 years agousb-xhci: add exit function
Gonglei [Wed, 4 Jun 2014 08:31:53 +0000 (16:31 +0800)]
usb-xhci: add exit function

clean up xhci resource when xhci pci device exit.

Signed-off-by: Gonglei <arei.gonglei@huawei.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
10 years agousb-ehci: add ehci-pci device exit function
Gonglei [Wed, 4 Jun 2014 08:31:52 +0000 (16:31 +0800)]
usb-ehci: add ehci-pci device exit function

clean up ehci resource when ehci pci device exit.

Signed-off-by: Gonglei <arei.gonglei@huawei.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
10 years agousb-ehci: add ehci unrealize funciton
Gonglei [Wed, 4 Jun 2014 08:31:51 +0000 (16:31 +0800)]
usb-ehci: add ehci unrealize funciton

cleanup ehci controller resource, both pci and sysbus
if they're necessary.

Signed-off-by: Gonglei <arei.gonglei@huawei.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
10 years agousb-ehci: add vmstate properity for EHCIState
Gonglei [Wed, 4 Jun 2014 08:31:50 +0000 (16:31 +0800)]
usb-ehci: add vmstate properity for EHCIState

since hotunplug the ehci host adapter, we should
delete vm_change_state_handler also, so the
VMChangeStateEntry should be saved in EHCIState.

Signed-off-by: Gonglei <arei.gonglei@huawei.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
10 years agousb-uhci: clean up uhci resource when pci-uhci exit
Gonglei [Wed, 4 Jun 2014 08:31:49 +0000 (16:31 +0800)]
usb-uhci: clean up uhci resource when pci-uhci exit

clean up uhci resource when uhci pci device exit.

Signed-off-by: Gonglei <arei.gonglei@huawei.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
10 years agousb-ohci: add exit function
Gonglei [Wed, 4 Jun 2014 08:31:48 +0000 (16:31 +0800)]
usb-ohci: add exit function

clean up ohci resource when ohci pci device exit.

Signed-off-by: Gonglei <arei.gonglei@huawei.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
10 years agousb-ohci: Fix memory leak for ohci timer
Gonglei [Wed, 4 Jun 2014 08:31:47 +0000 (16:31 +0800)]
usb-ohci: Fix memory leak for ohci timer

Signed-off-by: Gonglei <arei.gonglei@huawei.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
10 years agousb: add usb_bus_release function
Gonglei [Wed, 4 Jun 2014 08:31:46 +0000 (16:31 +0800)]
usb: add usb_bus_release function

add global variables releasing logic when the usb buses
were removed or hot-unpluged.

Signed-off-by: Gonglei <arei.gonglei@huawei.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
10 years agoRevert "xhci: Fix number of streams allocated when using streams"
Gerd Hoffmann [Fri, 29 Aug 2014 10:40:55 +0000 (12:40 +0200)]
Revert "xhci: Fix number of streams allocated when using streams"

This reverts commit d063c3112c4cd23a479ee18720c2bd119da2d315.

"2 << x" is the same as "2 ^ (x + 1)", so the old code is correct.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
10 years agoxhci: use (1u << i)
Gerd Hoffmann [Thu, 28 Aug 2014 08:51:35 +0000 (10:51 +0200)]
xhci: use (1u << i)

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
10 years agoFix OHCI ISO TD state never being written back.
Jack Un [Sat, 9 Aug 2014 20:34:36 +0000 (23:34 +0300)]
Fix OHCI ISO TD state never being written back.

There appears to be typo in OHCI with isochronous transfers
resulting in isoch. transfer descriptor state never being written back.
The'put_words' function is in a OR statement hence it is never called.

Signed-off-by: Jack Un <jack.un@gmail.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
10 years agoxhci: fix debug print compiling error
Gonglei [Thu, 21 Aug 2014 12:48:58 +0000 (20:48 +0800)]
xhci: fix debug print compiling error

after commit 003e15a180373048f0c1f4df0bfe303746eb2676
the DPRINTF will broke compiling, adjust its location.

Signed-off-by: Gonglei <arei.gonglei@huawei.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
10 years agousb: Fix bootindex for portnr > 9
Markus Armbruster [Fri, 15 Aug 2014 11:32:36 +0000 (13:32 +0200)]
usb: Fix bootindex for portnr > 9

We identify devices by their Open Firmware device paths.  The encoding
of the host controller and hub port numbers is incorrect:
usb_get_fw_dev_path() formats them in decimal, while SeaBIOS uses
hexadecimal.  When some port number > 9, SeaBIOS will miss the
bootindex (lucky case), or apply it to another device (unlucky case).

The relevant spec[*] agrees with SeaBIOS (and OVMF, for that matter).
Change %d to %x.

Bug can bite only with host controllers or hubs sporting more than ten
ports.  I'm not aware of any.

[*] Open Firmware Recommended Practice: Universal Serial Bus,
Version 1, Section 3.2.1 Device Node Address Representation
http://www.openfirmware.org/1275/bindings/usb/usb-1_0.ps

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Note: xhci can be configured with up to 15 ports (default is 4 ports).

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
10 years agonbd: Follow the BDS' AIO context
Max Reitz [Fri, 20 Jun 2014 19:57:34 +0000 (21:57 +0200)]
nbd: Follow the BDS' AIO context

Keep the NBD server always in the same AIO context as the exported BDS
by calling bdrv_add_aio_context_notifier() and implementing the required
callbacks.

Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
10 years agoblock: Add AIO context notifiers
Max Reitz [Fri, 20 Jun 2014 19:57:33 +0000 (21:57 +0200)]
block: Add AIO context notifiers

If a long-running operation on a BDS wants to always remain in the same
AIO context, it somehow needs to keep track of the BDS changing its
context. This adds a function for registering callbacks on a BDS which
are called whenever the BDS is attached or detached from an AIO context.

Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
10 years agonbd: Drop nbd_can_read()
Max Reitz [Fri, 20 Jun 2014 19:57:32 +0000 (21:57 +0200)]
nbd: Drop nbd_can_read()

There is no variant of aio_set_fd_handler() like qemu_set_fd_handler2(),
so we cannot give a can_read() callback function. Instead, unregister
the nbd_read() function whenever we cannot read and re-register it as
soon as we can read again.

All this is hidden behind the functions nbd_set_handlers() (which
registers all handlers for the AIO context and file descriptor belonging
to the given client), nbd_unset_handlers() (which unregisters them) and
nbd_update_can_read() (which checks whether NBD can read for the given
client and acts accordingly).

Signed-off-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
10 years agosheepdog: fix a core dump while do auto-reconnecting
Liu Yuan [Thu, 28 Aug 2014 10:27:55 +0000 (18:27 +0800)]
sheepdog: fix a core dump while do auto-reconnecting

We should reinit local_err as NULL inside the while loop or g_free() will report
corrupption and abort the QEMU when sheepdog driver tries reconnecting.

This was broken in commit 356b4ca.

qemu-system-x86_64: failed to get the header, Resource temporarily unavailable
qemu-system-x86_64: Failed to connect to socket: Connection refused
qemu-system-x86_64: (null)
[xcb] Unknown sequence number while awaiting reply
[xcb] Most likely this is a multi-threaded client and XInitThreads has not been called
[xcb] Aborting, sorry about that.
qemu-system-x86_64: ../../src/xcb_io.c:298: poll_for_response: Assertion `!xcb_xlib_threads_sequence_lost' failed.
Aborted (core dumped)

Cc: qemu-devel@nongnu.org
Cc: Markus Armbruster <armbru@redhat.com>
Cc: Kevin Wolf <kwolf@redhat.com>
Cc: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Liu Yuan <namei.unix@gmail.com>
Reviewed-by: Benoît Canet <benoit.canet@nodalink.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
10 years agoaio-win32: add support for sockets
Paolo Bonzini [Wed, 9 Jul 2014 09:53:10 +0000 (11:53 +0200)]
aio-win32: add support for sockets

Uses the same select/WSAEventSelect scheme as main-loop.c.
WSAEventSelect() is edge-triggered, so it cannot be used
directly, but it is still used as a way to exit from a
blocking g_poll().

Before g_poll() is called, we poll sockets with a non-blocking
select() to achieve the level-triggered semantics we require:
if a socket is ready, the g_poll() is made non-blocking too.

Based on a patch from Or Goshen.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
10 years agoqemu-coroutine-io: fix for Win32
Paolo Bonzini [Wed, 9 Jul 2014 09:53:09 +0000 (11:53 +0200)]
qemu-coroutine-io: fix for Win32

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
10 years agoAioContext: introduce aio_prepare
Paolo Bonzini [Wed, 9 Jul 2014 09:53:08 +0000 (11:53 +0200)]
AioContext: introduce aio_prepare

This will be used to implement socket polling on Windows.
On Windows, select() and g_poll() are completely different;
sockets are polled with select() before calling g_poll,
and the g_poll must be nonblocking if select() says a
socket is ready.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
10 years agoaio-win32: add aio_set_dispatching optimization
Paolo Bonzini [Wed, 9 Jul 2014 09:53:07 +0000 (11:53 +0200)]
aio-win32: add aio_set_dispatching optimization

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
10 years agotest-aio: test timers on Windows too
Paolo Bonzini [Wed, 9 Jul 2014 09:53:06 +0000 (11:53 +0200)]
test-aio: test timers on Windows too

Use EventNotifier instead of a pipe, which makes it trivial to test
timers on Windows.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
10 years agoAioContext: export and use aio_dispatch
Paolo Bonzini [Wed, 9 Jul 2014 09:53:05 +0000 (11:53 +0200)]
AioContext: export and use aio_dispatch

So far, aio_poll's scheme was dispatch/poll/dispatch, where
the first dispatch phase was used only in the GSource case in
order to avoid a blocking poll.  Earlier patches changed it to
dispatch/prepare/poll/dispatch, where prepare is aio_compute_timeout.

By making aio_dispatch public, we can remove the first dispatch
phase altogether, so that both aio_poll and the GSource use the same
prepare/poll/dispatch scheme.

This patch breaks the invariant that aio_poll(..., true) will not block
the first time it returns false.  This used to be fundamental for
qemu_aio_flush's implementation as "while (qemu_aio_wait()) {}" but
no code in QEMU relies on this invariant anymore.  The return value
of aio_poll() is now comparable with that of g_main_context_iteration.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
10 years agoAioContext: run bottom halves after polling
Paolo Bonzini [Wed, 9 Jul 2014 09:53:04 +0000 (11:53 +0200)]
AioContext: run bottom halves after polling

Make the dispatching phase the same before blocking and afterwards.
The next patch will make aio_dispatch public and use it directly
for the GSource case, instead of aio_poll.  aio_poll can then be
simplified heavily.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
10 years agoaio-win32: Factor out duplicate code into aio_dispatch_handlers
Paolo Bonzini [Wed, 9 Jul 2014 09:53:03 +0000 (11:53 +0200)]
aio-win32: Factor out duplicate code into aio_dispatch_handlers

Later, the call to aio_dispatch will move int the GSource wrapper, while the
standalone case will still be call the component functions aio_bh_poll,
aio_dispatch_handlers and timerlistgroup_run_timers.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
10 years agoaio-win32: Evaluate timers after handles
Paolo Bonzini [Wed, 9 Jul 2014 09:53:02 +0000 (11:53 +0200)]
aio-win32: Evaluate timers after handles

This is similar to what aio_poll does in the stand-alone case.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
10 years agoAioContext: take bottom halves into account when computing aio_poll timeout
Paolo Bonzini [Wed, 9 Jul 2014 09:53:01 +0000 (11:53 +0200)]
AioContext: take bottom halves into account when computing aio_poll timeout

Right now, QEMU invokes aio_bh_poll before the "poll" phase
of aio_poll.  It is simpler to do it afterwards and skip the
"poll" phase altogether when the OS-dependent parts of AioContext
are invoked from GSource.  This way, AioContext behaves more
similarly when used as a GSource vs. when used as stand-alone.

As a start, take bottom halves into account when computing the
poll timeout.  If a bottom half is ready, do a non-blocking
poll.  As a side effect, this makes idle bottom halves work
with aio_poll; an improvement, but not really an important
one since they are deprecated.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
10 years agoblockdev: fix drive-mirror 'granularity' error message
Stefan Hajnoczi [Wed, 27 Aug 2014 13:29:59 +0000 (14:29 +0100)]
blockdev: fix drive-mirror 'granularity' error message

Name the 'granularity' parameter and give its expected value range.
Previously the device name was mistakenly reported as the parameter
name.

Note that the error class is unchanged from ERROR_CLASS_GENERIC_ERROR.

Reported-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Benoît Canet <benoit.canet@nodalink.com>
10 years agocoroutine: Drop co_sleep_ns
Fam Zheng [Tue, 26 Aug 2014 07:15:43 +0000 (15:15 +0800)]
coroutine: Drop co_sleep_ns

block_job_sleep_ns is the only user. Since we are moving towards
AioContext aware code, it's better to use the explicit version and drop
the old one.

Signed-off-by: Fam Zheng <famz@redhat.com>
Reviewed-by: Benoît Canet <benoit.canet@nodalink.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
10 years agoblock/quorum: add simple read pattern support
Liu Yuan [Mon, 18 Aug 2014 09:41:05 +0000 (17:41 +0800)]
block/quorum: add simple read pattern support

This patch adds single read pattern to quorum driver and quorum vote is default
pattern.

For now we do a quorum vote on all the reads, it is designed for unreliable
underlying storage such as non-redundant NFS to make sure data integrity at the
cost of the read performance.

For some use cases as following:

        VM
  --------------
  |            |
  v            v
  A            B

Both A and B has hardware raid storage to justify the data integrity on its own.
So it would help performance if we do a single read instead of on all the nodes.
Further, if we run VM on either of the storage node, we can make a local read
request for better performance.

This patch generalize the above 2 nodes case in the N nodes. That is,

vm -> write to all the N nodes, read just one of them. If single read fails, we
try to read next node in FIFO order specified by the startup command.

The 2 nodes case is very similar to DRBD[1] though lack of auto-sync
functionality in the single device/node failure for now. But compared with DRBD
we still have some advantages over it:

- Suppose we have 20 VMs running on one(assume A) of 2 nodes' DRBD backed
storage. And if A crashes, we need to restart all the VMs on node B. But for
practice case, we can't because B might not have enough resources to setup 20 VMs
at once. So if we run our 20 VMs with quorum driver, and scatter the replicated
images over the data center, we can very likely restart 20 VMs without any
resource problem.

After all, I think we can build a more powerful replicated image functionality
on quorum and block jobs(block mirror) to meet various High Availibility needs.

E.g, Enable single read pattern on 2 children,

-drive driver=quorum,children.0.file.filename=0.qcow2,\
children.1.file.filename=1.qcow2,read-pattern=fifo,vote-threshold=1

[1] http://en.wikipedia.org/wiki/Distributed_Replicated_Block_Device

[Dropped \n from an error_setg() error message
--Stefan]

Cc: Benoit Canet <benoit@irqsave.net>
Cc: Eric Blake <eblake@redhat.com>
Cc: Kevin Wolf <kwolf@redhat.com>
Cc: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Liu Yuan <namei.unix@gmail.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
10 years agoqapi: add read-pattern enum for quorum
Liu Yuan [Mon, 18 Aug 2014 09:41:04 +0000 (17:41 +0800)]
qapi: add read-pattern enum for quorum

Cc: Eric Blake <eblake@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Benoît Canet <benoit.canet@nodalink.com>
Signed-off-by: Liu Yuan <namei.unix@gmail.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
10 years agosheepdog: improve error handling for a case of failed lock
Hitoshi Mitake [Mon, 11 Aug 2014 05:43:46 +0000 (14:43 +0900)]
sheepdog: improve error handling for a case of failed lock

Recently, sheepdog revived its VDI locking functionality. This patch
updates sheepdog driver of QEMU for this feature. It changes an error
code for a case of failed locking. -EBUSY is a suitable one.

Reported-by: Valerio Pachera <sirio81@gmail.com>
Cc: Kevin Wolf <kwolf@redhat.com>
Cc: Stefan Hajnoczi <stefanha@redhat.com>
Cc: Liu Yuan <namei.unix@gmail.com>
Cc: MORITA Kazutaka <morita.kazutaka@gmail.com>
Signed-off-by: Hitoshi Mitake <mitake.hitoshi@lab.ntt.co.jp>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
10 years agosheepdog: adopting protocol update for VDI locking
Hitoshi Mitake [Mon, 11 Aug 2014 05:43:45 +0000 (14:43 +0900)]
sheepdog: adopting protocol update for VDI locking

The update is required for supporting iSCSI multipath. It doesn't
affect behavior of QEMU driver but adding a new field to vdi request
struct is required.

Cc: Kevin Wolf <kwolf@redhat.com>
Cc: Stefan Hajnoczi <stefanha@redhat.com>
Cc: Liu Yuan <namei.unix@gmail.com>
Cc: MORITA Kazutaka <morita.kazutaka@gmail.com>
Signed-off-by: Hitoshi Mitake <mitake.hitoshi@lab.ntt.co.jp>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
10 years agoqemu-img: always goto out in img_snapshot() error paths
Stefan Hajnoczi [Tue, 26 Aug 2014 18:17:56 +0000 (19:17 +0100)]
qemu-img: always goto out in img_snapshot() error paths

The out label has the qemu_progress_end() and other cleanup calls.
Always goto out in error paths so the cleanup happens.  These error
paths now return 1 instead of -1.

Note that bdrv_unref(NULL) is safe.  We just need to initialize bs to
NULL at the top of the function.

We can now remove the obsolete bs_old_backing = NULL and bs_new_backing
= NULL for safe mode.  Originally it was necessary in commit 3e85c6fd
("qemu-img rebase") but became useless in commit c2abcce ("qemu-img:
avoid calling exit(1) to release resources properly") because the
variables are already initialized during declaration.

Reported-by: John Snow <jsnow@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
10 years agoqemu-img: fix img_compare() flags error path
Stefan Hajnoczi [Tue, 26 Aug 2014 18:17:55 +0000 (19:17 +0100)]
qemu-img: fix img_compare() flags error path

If img_compare() fails to parse the cache flags the goto out3 code path
will call qemu_progress_end().  Make sure we actually call
qemu_progress_init() first.

Reported-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
10 years agoqemu-img: fix img_commit() error return value
Stefan Hajnoczi [Tue, 26 Aug 2014 18:17:54 +0000 (19:17 +0100)]
qemu-img: fix img_commit() error return value

The img_commit() return value is a process exit code.  Use 1 for failure
instead of -1.  The other failure paths in this function already use 1.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
10 years agoblock.curl: adding 'timeout' option
Daniel Henrique Barboza [Wed, 13 Aug 2014 15:44:27 +0000 (12:44 -0300)]
block.curl: adding 'timeout' option

The curl hardcoded timeout (5 seconds) sometimes is not long
enough depending on the remote server configuration and network
traffic. The user should be able to set how much long he is
willing to wait for the connection.

Adding a new option to set this timeout gives the user this
flexibility. The previous default timeout of 5 seconds will be
used if this option is not present.

Reviewed-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Daniel Henrique Barboza <danielhb@linux.vnet.ibm.com>
Reviewed-by: Benoit Canet <benoit.canet@nodalink.com>
Tested-by: Richard W.M. Jones <rjones@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
10 years agoide: Fix bootindex for bus_id > 9
Markus Armbruster [Fri, 15 Aug 2014 11:32:37 +0000 (13:32 +0200)]
ide: Fix bootindex for bus_id > 9

We identify devices by their Open Firmware device paths.  The encoding
of bus numbers is incorrect: idebus_get_fw_dev_path() formats them in
decimal, while SeaBIOS uses hexadecimal.  With bus number > 9, SeaBIOS
will miss the bootindex (lucky case), or apply it to another device
(unlucky case).

Bug can't bite right now: ich9-ahci has six ports, and the sysbus-ahci
created by Calxeda Highbank has just one.

Fix it anyway, by changing %d to %x.

I couldn't find an Open Firmware spec covering this.  For what it's
worth, OVMF agrees with SeaBIOS.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
10 years agoMerge remote-tracking branch 'remotes/bonzini/tags/for-upstream' into staging
Peter Maydell [Thu, 28 Aug 2014 16:08:13 +0000 (17:08 +0100)]
Merge remote-tracking branch 'remotes/bonzini/tags/for-upstream' into staging

SCSI patches include bug fixes from Fam and Peter, improved error
reporting from Fam and a fix for DPRINTF bitrot.  Memory patches try
again to initialize name from the QOM name.

# gpg: Signature made Thu 28 Aug 2014 15:10:31 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:
  memory: Lazy init name from QOM name as needed
  xen: hvm: Abstract away memory region name ref
  xen-hvm: Constify string
  virtio-scsi: Report error if num_queues is 0 or too large
  scsi-generic: remove superfluous DPRINTF avoid to break compiling
  block/iscsi: fix memory corruption on iscsi resize
  scsi-bus: Convert DeviceClass init to realize
  block: Pass errp in blkconf_geometry

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