When an error was passed down to the guest because it was recoverable,
the sense length was not copied from the SG_IO data. As a result,
the guest saw the CHECK CONDITION status but not the sense data.
Signed-off-by: Shinichiro Kawasaki <shinichiro.kawasaki@wdc.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Turn helper_retaddr into a multi-state flag that may now also
indicate when we're performing a read on behalf of the translator.
In this case, release the mmap_lock before the longjmp back to
the main cpu loop, and thereby avoid a failing assert therein.
Fixes: https://bugs.launchpad.net/qemu/+bug/1832353
Tested-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This code block is already surrounded by #ifndef CODE_ACCESS.
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
These functions are not used, and are not usable in the
context of code generation, because we never have a helper
return address to pass in to them.
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
At present we have a potential error in that helper_retaddr contains
data for handle_cpu_signal, but we have not ensured that those stores
will be scheduled properly before the operation that may fault.
It might be that these races are not in practice observable, due to
our use of -fno-strict-aliasing, but better safe than sorry.
Adjust all of the setters of helper_retaddr.
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
We have some potential race conditions vs our user-exec signal
handler that will be solved with this barrier.
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This patch fixes two problems:
(1) The inputs to the EXTR insn were reversed,
(2) The input constraints use rZ, which means that we need to use
the REG0 macro in order to supply XZR for a constant 0 input.
Fixes: 464c2969d5
Reported-by: Peter Maydell <peter.maydell@linaro.org>
Tested-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
On a 64-bit host, discard any replications of the 32-bit
sign bit when performing the shift and merge.
Fixes: https://bugs.launchpad.net/bugs/1834496
Tested-by: Christophe Lyon <christophe.lyon@linaro.org>
Tested-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
A bunch of fixes all over the place.
ACPI tests will now run on more systems: might
introduce new failure reports but that's for
the best, isn't it?
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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Merge remote-tracking branch 'remotes/mst/tags/for_upstream' into staging
virtio, pc, pci: fixes, cleanups, tests
A bunch of fixes all over the place.
ACPI tests will now run on more systems: might
introduce new failure reports but that's for
the best, isn't it?
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
# gpg: Signature made Fri 12 Jul 2019 15:57:40 BST
# gpg: using RSA key 281F0DB8D28D5469
# gpg: Good signature from "Michael S. Tsirkin <mst@kernel.org>" [full]
# gpg: aka "Michael S. Tsirkin <mst@redhat.com>" [full]
# Primary key fingerprint: 0270 606B 6F3C DF3D 0B17 0970 C350 3912 AFBE 8E67
# Subkey fingerprint: 5D09 FD08 71C8 F85B 94CA 8A0D 281F 0DB8 D28D 5469
* remotes/mst/tags/for_upstream:
virtio pmem: remove transitional names
virtio pmem: remove memdev null check
virtio pmem: fix wrong mem region condition
tests: acpi: do not skip tests when IASL is not installed
tests: acpi: do not require IASL for dumping AML blobs
virtio-balloon: fix QEMU 4.0 config size migration incompatibility
pcie: consistent names for function args
xio3130_downstream: typo fix
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Remove transitional & non transitional names for virtio pmem.
Only virtio 1.0 and up is supported.
Signed-off-by: Pankaj Gupta <pagupta@redhat.com>
Message-Id: <20190712073554.21918-4-pagupta@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Coverity reports that when we're assigning vi->size we handle the
"pmem->memdev is NULL" case; but we then pass it into
object_get_canonical_path(), which unconditionally dereferences it
and will crash if it is NULL. If this pointer can be NULL then we
need to do something else here.
We are removing 'pmem->memdev' null check here as memdev will never
be null in this function.
Signed-off-by: Pankaj Gupta <pagupta@redhat.com>
Message-Id: <20190712073554.21918-3-pagupta@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Coverity reported memory region returns zero
for non-null value. This is because of wrong
arguments to '?:' , fixing this.
Signed-off-by: Pankaj Gupta <pagupta@redhat.com>
Message-Id: <20190712073554.21918-2-pagupta@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
tests do binary comparision so we can check tables without
IASL. Move IASL condition right before decompilation step
and skip it if IASL is not installed.
Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20190708092410.11167-3-imammedo@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
IASL isn't needed when dumping ACPI tables from guest for
rebuild purposes. So move this part out from IASL branch.
Makes rebuild-expected-aml.sh work without IASL installed
on host.
Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Message-Id: <20190708092410.11167-2-imammedo@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
The virtio-balloon config size changed in QEMU 4.0 even for existing
machine types. Migration from QEMU 3.1 to 4.0 can fail in some
circumstances with the following error:
qemu-system-x86_64: get_pci_config_device: Bad config data: i=0x10 read: a1 device: 1 cmask: ff wmask: c0 w1cmask:0
This happens because the virtio-balloon config size affects the VIRTIO
Legacy I/O Memory PCI BAR size.
Introduce a qdev property called "qemu-4-0-config-size" and enable it
only for the QEMU 4.0 machine types. This way <4.0 machine types use
the old size, 4.0 uses the larger size, and >4.0 machine types use the
appropriate size depending on enabled virtio-balloon features.
Live migration to and from old QEMUs to QEMU 4.1 works again as long as
a versioned machine type is specified (do not use just "pc"!).
Originally-by: Wolfgang Bumiller <w.bumiller@proxmox.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-Id: <20190710141440.27635-1-stefanha@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Tested-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Tested-by: Wolfgang Bumiller <w.bumiller@proxmox.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
The function declarations for pci_cap_slot_get and
pci_cap_slot_write_config call the argument "slot_ctl", but the function
definitions and all the call sites drop the 'o' and call it "slt_ctl".
Let's be consistent.
Reported-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Marcel Apfelbaum <marcel.apfelbaum@gmail.com>
slt ctl/status are passed in incorrect order.
Fix this up.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reported-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Marcel Apfelbaum <marcel.apfelbaum@gmail.com>
Regular kernel block devices (/dev/sda*, /dev/nvme*, etc) don't have
max segment size/max segment count hardware requirements exposed
to the userspace, but rather the kernel block layer
takes care to split the incoming requests that
violate these requirements.
Allowing the kernel to do the splitting allows qemu to avoid
various overheads that arise otherwise from this.
This is especially visible in nbd server,
exposing as a raw file, a mostly empty qcow2 image over the net.
In this case most of the reads by the remote user
won't even hit the underlying kernel block device,
and therefore most of the overhead will be in the
nbd traffic which increases significantly with lower max transfer size.
In addition to that even for local block device
access the peformance improves a bit due to less
traffic between qemu and the kernel when large
transfer sizes are used (e.g for image conversion)
More info can be found at:
https://bugzilla.redhat.com/show_bug.cgi?id=1647104
Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Pankaj Gupta <pagupta@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
A recent tweak to the '-o help' output for qemu-img needs to be
reflected into the iotests expected outputs.
Fixes: f7077c98
Reported-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
First 4.1 hard freeze pull request. Not much here, just a bug fix for
the XICS interrupt controller and a SLOF firmware update to fix a bug
with IP discovery when there are multiple NICs.
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Merge remote-tracking branch 'remotes/dgibson/tags/ppc-for-4.1-20190712' into staging
ppc patch queue for 2019-07-12
First 4.1 hard freeze pull request. Not much here, just a bug fix for
the XICS interrupt controller and a SLOF firmware update to fix a bug
with IP discovery when there are multiple NICs.
# gpg: Signature made Fri 12 Jul 2019 06:51:24 BST
# gpg: using RSA key 75F46586AE61A66CC44E87DC6C38CACA20D9B392
# gpg: Good signature from "David Gibson <david@gibson.dropbear.id.au>" [full]
# gpg: aka "David Gibson (Red Hat) <dgibson@redhat.com>" [full]
# gpg: aka "David Gibson (ozlabs.org) <dgibson@ozlabs.org>" [full]
# gpg: aka "David Gibson (kernel.org) <dwg@kernel.org>" [unknown]
# Primary key fingerprint: 75F4 6586 AE61 A66C C44E 87DC 6C38 CACA 20D9 B392
* remotes/dgibson/tags/ppc-for-4.1-20190712:
xics/kvm: Always set the MASKED bit if interrupt is masked
pseries: Update SLOF firmware image
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
The ics_set_kvm_state_one() function is called either to restore the
state of an interrupt source during migration or to set the interrupt
source to a default state during reset.
Since always, ie. 2013, the code only sets the MASKED bit if the 'current
priority' and the 'saved priority' are different. This is likely true
when restoring an interrupt that had been previously masked with the
ibm,int-off RTAS call. However this is always false in the case of
reset since both 'current priority' and 'saved priority' are equal to
0xff, and the MASKED bit is never set.
The legacy KVM XICS device gets away with that because it ends updating
its internal structure the same way, whether the MASKED bit is set or
the priority is 0xff.
The XICS-on-XIVE device for POWER9 is different. It sticks to the KVM
documentation [1] and _really_ relies on the MASKED bit to correctly
set. If not, it will configure the interrupt source in the XIVE HW, even
though the guest hasn't configured the interrupt yet. This disturbs the
complex logic implemented in XICS-on-XIVE and may result in the loss of
subsequent queued events.
Always set the MASKED bit if interrupt is masked as expected by the KVM
XICS-on-XIVE device. This has no impact on the legacy KVM XICS.
[1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/virtual/kvm/devices/xics.txt
Signed-off-by: Greg Kurz <groug@kaod.org>
Message-Id: <156217454083.559957.7359208229523652842.stgit@bahia.lan>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This only has a fix for ipv4-after-ipv6 booting problem.
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
The annotated style json we use in QMP documentation is not strict json
and depending on the version of Sphinx (2.0+) or Pygments installed,
might cause the build to fail.
Use the new QMP lexer.
Further, some versions of Sphinx can not apply custom lexers to "code"
directives and require the use of "code-block" directives instead, so
make that change at this time as well.
Tested under:
- Sphinx 1.3.6 and Pygments 2.4
- Sphinx 1.7.6 and Pygments 2.2 (Fedora 29 packages)
- Sphinx 2.0.1 and Pygments 2.4
- Sphinx 3.0.0+/f396b3a783 and Pygments 2.4 (From Sphinx git c4f44bdd)
Reported-by: Aarushi Mehta <mehta.aaru20@gmail.com>
Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
Message-id: 20190603214653.29369-4-jsnow@redhat.com
Signed-off-by: John Snow <jsnow@redhat.com>
Sphinx, through Pygments, does not like annotated json examples very
much. In some versions of Sphinx (1.7), it will render the non-json
portions of code blocks in red, but in newer versions (2.0) it will
throw an exception and not highlight the block at all. Though we can
suppress this warning, it doesn't bring back highlighting on non-strict
json blocks.
We can alleviate this by creating a custom lexer for QMP examples that
allows us to properly highlight these examples in a robust way, keeping
our directionality and elision notations.
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: John Snow <jsnow@redhat.com>
Reported-by: Aarushi Mehta <mehta.aaru20@gmail.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20190603214653.29369-3-jsnow@redhat.com
Signed-off-by: John Snow <jsnow@redhat.com>
Pygments and Sphinx get pickier all the time; Sphinx 2.1+ now catches
these errors.
Signed-off-by: John Snow <jsnow@redhat.com>
Reported-by: Aarushi Mehta <mehta.aaru20@gmail.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Message-id: 20190603214653.29369-2-jsnow@redhat.com
Signed-off-by: John Snow <jsnow@redhat.com>
The refactoring of handle_set_reg missed the fact we previously had
responded with an empty packet when we were not using XML based
protocols. This broke the fallback behaviour for architectures that
don't have registers defined in QEMU's gdb-xml directory.
Revert to the previous behaviour and clean up the commentary for what
is going on.
Fixes: 62b3320bdd
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Tested-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Cc: Jon Doron <arilou@gmail.com>
Add a link to the remote protocol spec and an SPDX tag.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
A side effect of piping the output to head is squash the exit status
of the diff command. Fix this by only doing the pipe if the diff
failed and then ensuring the status is non-zero.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
We never shipped the reference data in the source tree because it's
quite big (64M). As a result the only option is to generate it
locally. Although we have a rule to generate the reference file we
missed the dependency and location changes, probably because it's only
run for SLOW test runs.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Recent commit "Makefile: Reuse all's recursion machinery for clean and
install" broke targets clean and distclean in the source directory
before running configure:
$ make clean
LD recurse-clean.mo
cc: fatal error: no input files
compilation terminated.
make: *** [rules.mak:118: recurse-clean.mo] Error 1
Root cause is missing .PHONY. Fix that.
Fixes: 1338a4b726
Reported-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Tested-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This reverts commit 3ae0343db6.
Stephen Checkoway noticed commit 3ae0343db6 is incorrect.
This commit state all parallel flashes are limited to 16-bit
accesses, however the x32 configuration exists in some models,
such the Cypress S29CL032J, which CFI Device Geometry Definition
announces:
CFI ADDR DATA
0x28,0x29 = 0x0003 (x32-only asynchronous interface)
Guests should not be affected by the previous change, because
QEMU does not announce itself as x32 capable:
/* Flash device interface (8 & 16 bits) */
pfl->cfi_table[0x28] = 0x02;
pfl->cfi_table[0x29] = 0x00;
Commit 3ae0343db6 does not restrict the bus to 16-bit accesses,
but restrict the implementation as 16-bit access max, so a guest
32-bit access will result in 2x 16-bit calls.
Now, we have 2 boards that register the flash device in 32-bit
access:
- PPC: taihu_405ep
The CFI id matches the S29AL008J that is a 1MB in x16, while
the code QEMU forces it to be 2MB, and checking Linux it expects
a 4MB flash.
- ARM: Digic4
While the comment says "Samsung K8P3215UQB 64M Bit (4Mx16)",
this flash is 32Mb (2MB). Also note the CFI id does not match
the comment.
To avoid unexpected side effect, we revert commit 3ae0343db6,
and will clean the board code later.
Reported-by: Stephen Checkoway <stephen.checkoway@oberlin.edu>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
...so that the compiler properly recognizes it.
Reported-by: Stefan Weil <sw@weilnetz.de>
Fixes: f180da83c0 ("s390x/tcg: Implement VECTOR LOAD LOGICAL ELEMENT AND ZERO")
Message-Id: <20190708125433.16927-3-cohuck@redhat.com>
Reviewed-by: Stefan Weil <sw@weilnetz.de>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
The new facility is called "Vector-Packed-Decimal-Enhancement Facility"
and not "Vector BCD enhancements facility 1". As the shortname might
have already found its way into some backports, let's keep vxbeh.
Fixes: 54d65de0b5 ("s390x/cpumodel: vector enhancements")
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Message-Id: <20190708150931.93448-1-borntraeger@de.ibm.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
This operation can always be emitted, even if we need to
fall back to xor. Adjust the assertions to match.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Commit 269bd5d8 "cpu: Move the softmmu tlb to CPUNegativeOffsetState'
broke the RISC-V host build as there are two variables that are used but
not defined.
This patch renames the undefined variables mask_off and table_off to the
existing (but unused) mask_ofs and table_ofs variables.
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <79729cc88ca509e08b5c4aa0aa8a52847af70c0f.1561039316.git.alistair.francis@wdc.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
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-----END PGP SIGNATURE-----
Merge remote-tracking branch 'remotes/stefanberger/tags/pull-tpm-2019-07-08-1' into staging
Merge tpm 2019/07/08 v1
# gpg: Signature made Mon 08 Jul 2019 15:04:46 BST
# gpg: using RSA key 75AD65802A0B4211
# gpg: Good signature from "Stefan Berger <stefanb@linux.vnet.ibm.com>" [unknown]
# gpg: WARNING: This key is not certified with a trusted signature!
# gpg: There is no indication that the signature belongs to the owner.
# Primary key fingerprint: B818 B9CA DF90 89C2 D5CE C66B 75AD 6580 2A0B 4211
* remotes/stefanberger/tags/pull-tpm-2019-07-08-1:
hw/tpm: Only build tpm_ppi.o if any of TPM_TIS/TPM_CRB is built
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
The TPM Physical Presence Interface routines are only used
by the CRB/TIS interfaces. Do not compile this file if any
of them is built.
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Stefan Berger <stefanb@linux.ibm.com>
Signed-off-by: Stefan Berger <stefanb@linux.ibm.com>
Commit b76b4f60 allowed '-o compat=v3' as an alias for the
less-appealing '-o compat=1.1' for 'qemu-img create' since we want to
use the QMP form as much as possible, but forgot to do likewise for
qemu-img amend. Also, it doesn't help that '-o help' doesn't list our
new preferred spellings.
Signed-off-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Remove Josh as per his request since he is no longer the upstream RBD
tech lead. Add myself as the maintainer since I am the current RBD tech
lead.
Signed-off-by: Jason Dillaman <dillaman@redhat.com>
Reviewed-by: Josh Durgin <jdurgin@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reported-by: radmehrsaeed7@gmail.com
Fixes: https://bugs.launchpad.net/bugs/1832914
Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
When the 'cont' command resumes guest execution the vm change state
handlers are invoked. Unfortunately there is no explicit ordering
between classic qemu_add_vm_change_state_handler() callbacks. When two
layers of code both use vm change state handlers, we don't control which
handler runs first.
virtio-scsi with iothreads hits a deadlock when a failed SCSI command is
restarted and completes before the iothread is re-initialized.
This patch uses the new qdev_add_vm_change_state_handler() API to
guarantee that virtio-scsi's virtio change state handler executes before
the SCSI bus children. This way DMA is restarted after the iothread has
re-initialized.
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
