The way that attaching bs->file worked was a bit unusual in that it was
the only child that would be attached to a node which is not opened yet.
Because of this, the block layer couldn't know yet which permissions the
driver would eventually need.
This patch moves the point where bs->file is attached to the beginning
of the individual .bdrv_open() implementations, so drivers already know
what they are going to do with the child. This is also more consistent
with how driver-specific children work.
For a moment, bdrv_open() gets its own BdrvChild to perform image
probing, but instead of directly assigning this BdrvChild to the BDS, it
becomes a temporary one and the node name is passed as an option to the
drivers, so that they can simply use bdrv_open_child() to create another
reference for their own use.
This duplicated child for (the not opened yet) bs is not the final
state, a follow-up patch will change the image probing code to use a
BlockBackend, which is completely independent of bs.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
This is more consistent with the commit block job, and it moves the code
to a place where we already have the necessary BlockBackends to resize
the base image when bdrv_truncate() is changed to require a BdrvChild.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
In order to able to convert bdrv_truncate() to take a BdrvChild and
later to correctly check the resize permission here, we need to use a
BlockBackend for resizing the image.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
In order to be able to do permission checking and to keep working with
the BdrvChild based bdrv_truncate() that this involves, we need to
create a temporary BlockBackend to resize the image.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
We can't rely on a non-paused job to be present and running for us.
Assume that if the job is not present that it completed already.
Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Now that we are truncating the file in both PREALLOC_MODE_FULL and
PREALLOC_MODE_OFF, not truncating in PREALLOC_MODE_FALLOC looks odd.
Add a comment explaining why we do not truncate in this case.
Signed-off-by: Nir Soffer <nirsof@gmail.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
In a previous commit (qemu-img: Do not truncate before preallocation) we
moved truncate to the PREALLOC_MODE_OFF branch to avoid slowdown in
posix_fallocate().
However this change is not optimal when using PREALLOC_MODE_FULL, since
knowing the final size from the beginning could allow the file system
driver to do less allocations and possibly avoid fragmentation of the
file.
Now we truncate also before doing full preallocation.
Signed-off-by: Nir Soffer <nirsof@gmail.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Add tests for creating raw image with and without the preallocation
option.
Signed-off-by: Nir Soffer <nirsof@gmail.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
When using file system that does not support fallocate() (e.g. NFS <
4.2), truncating the file only when preallocation=OFF speeds up creating
raw file.
Here is example run, tested on Fedora 24 machine, creating raw file on
NFS version 3 server.
$ time ./qemu-img-master create -f raw -o preallocation=falloc mnt/test 1g
Formatting 'mnt/test', fmt=raw size=1073741824 preallocation=falloc
real 0m21.185s
user 0m0.022s
sys 0m0.574s
$ time ./qemu-img-fix create -f raw -o preallocation=falloc mnt/test 1g
Formatting 'mnt/test', fmt=raw size=1073741824 preallocation=falloc
real 0m11.601s
user 0m0.016s
sys 0m0.525s
$ time dd if=/dev/zero of=mnt/test bs=1M count=1024 oflag=direct
1024+0 records in
1024+0 records out
1073741824 bytes (1.1 GB, 1.0 GiB) copied, 15.6627 s, 68.6 MB/s
real 0m16.104s
user 0m0.009s
sys 0m0.220s
Running with strace we can see that without this change we do one
pread() and one pwrite() for each block. With this change, we do only
one pwrite() per block.
$ strace ./qemu-img-master create -f raw -o preallocation=falloc mnt/test 8192
...
pread64(9, "\0", 1, 4095) = 1
pwrite64(9, "\0", 1, 4095) = 1
pread64(9, "\0", 1, 8191) = 1
pwrite64(9, "\0", 1, 8191) = 1
$ strace ./qemu-img-fix create -f raw -o preallocation=falloc mnt/test 8192
...
pwrite64(9, "\0", 1, 4095) = 1
pwrite64(9, "\0", 1, 8191) = 1
This happens because posix_fallocate is checking if each block is
allocated before writing a byte to the block, and when truncating the
file before preallocation, all blocks are unallocated.
Signed-off-by: Nir Soffer <nirsof@gmail.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Some iotests (e.g. 174) try to filter the output of _make_test_image by
piping the stdout. Pipe the server stdout to /dev/null, so that filter
pipe does not need to wait until process completion.
Signed-off-by: Jeff Cody <jcody@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Add the ability for shell script tests to exclude specific
protocols. This is useful to allow all protocols except ones known to
not support a feature used in the test (e.g. .bdrv_create).
Signed-off-by: Jeff Cody <jcody@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Since test 137 make uses of qcow2.py, only local files are supported.
Signed-off-by: Jeff Cody <jcody@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
CIRRUS_BLTMODE_MEMSYSSRC blits do NOT check blit destination
and blit width, at all. Oops. Fix it.
Security impact: high.
The missing blit destination check allows to write to host memory.
Basically same as CVE-2014-8106 for the other blit variants.
Cc: qemu-stable@nongnu.org
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This pull request has:
* Yet more POWER9 instruction implementations
* Some extensions to the softfloat code which are necesssary for
some of those instructions
* Some preliminary patches in preparation for POWER9 softmmu
implementation
* Igor Mammedov's cleanups to unify hotplug cpu handling across
architectures
* Assorted bugfixes
The softfloat and cpu hotplug changes aren't entirely ppc specific (in
fact the hotplug stuff contains some pc specific patches). However
they're included here because ppc is one of the main beneficiaries,
and the series depend on some ppc specific patches.
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Merge remote-tracking branch 'remotes/dgibson/tags/ppc-for-2.9-20170222' into staging
ppc patch queue for 2017-02-22
This pull request has:
* Yet more POWER9 instruction implementations
* Some extensions to the softfloat code which are necesssary for
some of those instructions
* Some preliminary patches in preparation for POWER9 softmmu
implementation
* Igor Mammedov's cleanups to unify hotplug cpu handling across
architectures
* Assorted bugfixes
The softfloat and cpu hotplug changes aren't entirely ppc specific (in
fact the hotplug stuff contains some pc specific patches). However
they're included here because ppc is one of the main beneficiaries,
and the series depend on some ppc specific patches.
# gpg: Signature made Wed 22 Feb 2017 06:29:47 GMT
# gpg: using RSA key 0x6C38CACA20D9B392
# gpg: Good signature from "David Gibson <david@gibson.dropbear.id.au>"
# gpg: aka "David Gibson (Red Hat) <dgibson@redhat.com>"
# gpg: aka "David Gibson (ozlabs.org) <dgibson@ozlabs.org>"
# gpg: aka "David Gibson (kernel.org) <dwg@kernel.org>"
# Primary key fingerprint: 75F4 6586 AE61 A66C C44E 87DC 6C38 CACA 20D9 B392
* remotes/dgibson/tags/ppc-for-2.9-20170222: (43 commits)
hw/ppc/ppc405_uc.c: Avoid integer overflows
hw/ppc/spapr: Check for valid page size when hot plugging memory
target-ppc: fix Book-E TLB matching
hw/net/spapr_llan: 6 byte mac address device tree entry
machine: replace query_hotpluggable_cpus() callback with has_hotpluggable_cpus flag
machine: unify [pc_|spapr_]query_hotpluggable_cpus() callbacks
spapr: reuse machine->possible_cpus instead of cores[]
change CPUArchId.cpu type to Object*
pc: pass apic_id to pc_find_cpu_slot() directly so lookup could be done without CPU object
pc: calculate topology only once when possible_cpus is initialised
pc: move pcms->possible_cpus init out of pc_cpus_init()
machine: move possible_cpus to MachineState
hw/pci-host/prep: Do not use hw_error() in realize function
target/ppc/POWER9: Direct all instr and data storage interrupts to the hypv
target/ppc/POWER9: Adapt LPCR handling for POWER9
target/ppc/POWER9: Add ISAv3.00 MMU definition
target/ppc: Fix LPCR DPFD mask define
target-ppc: Add xscvqpudz and xscvqpuwz instructions
target-ppc: Implement round to odd variants of quad FP instructions
softfloat: Add float128_to_uint32_round_to_zero()
...
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This reverts commit d3473e147a.
This commit creates a board which defaults to having 2GB of RAM.
Unfortunately on 32-bit hosts we can't create boards with 2GB of RAM,
and so 'make check' fails. I missed this during testing of the
merge, unfortunately. Luckily the offending commit is the last
one in the merge request, so we can just revert it for now.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Split xhci properties into common and nec specific.
Move the backward compat flags to nec, so the new qemu-xhci
devices doesn't carry on the compatibiity stuff.
Move the msi/msix switches too and just enable msix for qemu-xhci.
Also move the intrs and slots properties. Wasn't a great idea to
make them configurable in the first place, nobody needs this.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Message-id: 1487663432-10410-1-git-send-email-kraxel@redhat.com
It should return 1 if an error occurs when reading td.
This will avoid an infinite loop issue in ohci_service_ed_list.
Signed-off-by: Li Qiang <liqiang6-s@360.cn>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-id: 1487760990-115925-1-git-send-email-liqiang6-s@360.cn
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Curiously, unrealize() is not being used, but it seems more
appropriate than handle_destroy() together with realize(). It is more
ubiquitous destroy name in qemu code base and may throw errors.
Cc: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-id: 20170221141451.28305-25-marcandre.lureau@redhat.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Changes:
* Add MIPS Boston board support
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Merge remote-tracking branch 'remotes/yongbok/tags/mips-20170222' into staging
MIPS patches 2017-02-22
Changes:
* Add MIPS Boston board support
# gpg: Signature made Wed 22 Feb 2017 00:08:00 GMT
# gpg: using RSA key 0x2238EB86D5F797C2
# gpg: Good signature from "Yongbok Kim <yongbok.kim@imgtec.com>"
# gpg: WARNING: This key is not certified with sufficiently trusted signatures!
# gpg: It is not certain that the signature belongs to the owner.
# Primary key fingerprint: 8600 4CF5 3415 A5D9 4CFA 2B5C 2238 EB86 D5F7 97C2
* remotes/yongbok/tags/mips-20170222:
hw/mips: MIPS Boston board support
hw: xilinx-pcie: Add support for Xilinx AXI PCIe Controller
loader: Support Flattened Image Trees (FIT images)
dtc: Update requirement to v1.4.2
target-mips: Provide function to test if a CPU supports an ISA
hw/mips_gic: Update pin state on mask changes
hw/mips_gictimer: provide API for retrieving frequency
hw/mips_cmgcr: allow GCR base to be moved
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
When performing clock calculations, the ppc405_uc code
has several places where it multiplies together two
32-bit variables and assigns the result to a 64-bit
variable. This doesn't quite do what is intended because
C will compute a 32-bit multiply result. Add casts to
ensure we don't truncate the result.
(Spotted by Coverity, CID 1005504, 1005505.)
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
On POWER, the valid page sizes that the guest can use are bound
to the CPU and not to the memory region. QEMU already has some
fancy logic to find out the right maximum memory size to tell
it to the guest during boot (see getrampagesize() in the file
target/ppc/kvm.c for more information).
However, once we're booted and the guest is using huge pages
already, it is currently still possible to hot-plug memory regions
that does not support huge pages - which of course does not work
on POWER, since the guest thinks that it is possible to use huge
pages everywhere. The KVM_RUN ioctl will then abort with -EFAULT,
QEMU spills out a not very helpful error message together with
a register dump and the user is annoyed that the VM unexpectedly
died.
To avoid this situation, we should check the page size of hot-plugged
DIMMs to see whether it is possible to use it in the current VM.
If it does not fit, we can print out a better error message and
refuse to add it, so that the VM does not die unexpectely and the
user has a second chance to plug a DIMM with a matching memory
backend instead.
Buglink: https://bugzilla.redhat.com/show_bug.cgi?id=1419466
Signed-off-by: Thomas Huth <thuth@redhat.com>
[dwg: Fix a build error on 32-bit builds with KVM]
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
The Book-E TLB matching process should bail out early when a TLB
entry matches, but the access permissions are wrong. The CPU
will then raise a DSI error instead of a Data TLB error, as
described for TLB matching in Freescale and IBM documents.
Signed-off-by: Alex Zuepke <azu@sysgo.de>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
The spapr-vlan device in QEMU has always presented it's MAC address in
the device tree as an 8 byte value, even though PAPR requires it to be
6 bytes. This is because, at the time, AIX required the value to be 8
bytes. However, modern versions of AIX support the (correct) 6
byte value so they no longer require the workaround.
It would be neatest to always provide a 6 byte value but that would
cause a problem with old Linux kernel ibmveth drivers, so the old 8
byte value is still presented when necessary.
Since commit 13f85203e (3.10, May 2013) the driver has been able to
handle 6 or 8 byte addresses so versions after that don't need to be
considered specially.
Drivers from kernels before that can also handle either type of
address, but not always:
* If the first byte's lowest bits are 10, the address must be 6 bytes.
* Otherwise, the address must be 8 bytes.
(The two bits in question are significant in a MAC address: they
indicate a locally-administered unicast address.)
So to maintain compatibility the old 8 byte value is presented when
the lowest two bits of the first byte are not 10.
Signed-off-by: Sam Bobroff <sam.bobroff@au1.ibm.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Generic helper machine_query_hotpluggable_cpus() replaced
target specific query_hotpluggable_cpus() callbacks so
there is no need in it anymore. However inon NULL callback
value is used to detect/report hotpluggable cpus support,
therefore it can be removed completely.
Replace it with MachineClass.has_hotpluggable_cpus boolean
which is sufficient for the task.
Suggested-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
All callbacks FOO_query_hotpluggable_cpus() are practically
the same except of setting vcpus_count to different values.
Convert them to a generic machine_query_hotpluggable_cpus()
callback by moving vcpus_count initialization to per machine
specific callback possible_cpu_arch_ids().
Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Replace SPAPR specific cores[] array with generic
machine->possible_cpus and store core objects there.
It makes cores bookkeeping similar to x86 cpus and
will allow to unify similar code.
It would allow to replace cpu_index based NUMA node
mapping with iproperty based one (for -device created
cores) since possible_cpus carries board defined
topology/layout.
Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
so it could be reused for SPAPR cores as well
Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Fill in CpuInstanceProperties once at board init time and
just copy them whenever query_hotpluggable_cpus() is called.
It will keep topology info always available without need
to recalculate it every time it's needed.
Considering it has NUMA node id, it will be used to keep
NUMA node to cpu mapping instead of numa_info[i].node_cpu
bitmasks.
Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
possible_cpus could be initialized earlier then cpu objects,
i.e. when -smp is parsed so move init code to possible_cpu_arch_ids()
interface func and do initialization on the first call.
it should help later with making -numa cpu/-smp parsing a machine state
properties.
Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
so that it would be possible to reuse it with
spapr/virt-aarch64 targets.
Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
hw_error() is for CPU related errors only (it prints out a
register dump and calls abort()), so we should not use it
if we just failed to load the bios image. Apart from that,
realize() functions should not exit directly but always set
the errp with error_setg() in case of errors instead.
Additionally, move some code around and delete the bios memory
subregion again in case of such an error, so that we leave a
clean state when returning to the caller.
Signed-off-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Hervé Poussineau <hpoussin@reactos.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
The vpm0 bit was removed from the LPCR in POWER9, this bit controlled
whether ISI and DSI interrupts were directed to the hypervisor or the
partition. These interrupts now go to the hypervisor irrespective, thus
it is no longer necessary to check the vmp0 bit in the LPCR.
Signed-off-by: Suraj Jitindar Singh <sjitindarsingh@gmail.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
The logical partitioning control register controls a threads operation
based on the partition it is currently executing. Add new definitions and
update the mask used when writing to the LPCR based on the POWER9 spec.
Signed-off-by: Suraj Jitindar Singh <sjitindarsingh@gmail.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
POWER9 processors implement the mmu as defined in version 3.00 of the ISA.
Add a definition for this mmu model and set the POWER9 cpu model to use
this mmu model.
Signed-off-by: Suraj Jitindar Singh <sjitindarsingh@gmail.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
The DPFD field in the LPCR is 3 bits wide. This has always been defined
as 0x3 << shift which indicates a 2 bit field, which is incorrect.
Correct this.
Signed-off-by: Suraj Jitindar Singh <sjitindarsingh@gmail.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
xscvqpudz: VSX Scalar truncate & Convert Quad-Precision format to
Unsigned Doubleword format
xscvqpuwz: VSX Scalar truncate & Convert Quad-Precision format to
Unsigned Word format
Signed-off-by: Bharata B Rao <bharata@linux.vnet.ibm.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
xsaddqpo: VSX Scalar Add Quad-Precision using round to Odd
xsmulqo: VSX Scalar Multiply Quad-Precision using round to Odd
xsdivqpo: VSX Scalar Divide Quad-Precision using round to Odd
xscvqpdpo: VSX Scalar round & Convert Quad-Precision format to
Double-Precision format using round to Odd
xssqrtqpo: VSX Scalar Square Root Quad-Precision using round to Odd
xssubqpo: VSX Scalar Subtract Quad-Precision using round to Odd
In addition, fix the invalid bitmask in the instruction encoding
of xssqrtqp[o].
Signed-off-by: Bharata B Rao <bharata@linux.vnet.ibm.com>
CC: Jose Ricardo Ziviani <joserz@linux.vnet.ibm.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
float128_to_uint32_round_to_zero() is needed by xscvqpuwz instruction
of PowerPC ISA 3.0.
Signed-off-by: Bharata B Rao <bharata@linux.vnet.ibm.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Implement float128_to_uint64() and use that to implement
float128_to_uint64_round_to_zero()
This is required by xscvqpudz instruction of PowerPC ISA 3.0.
Signed-off-by: Bharata B Rao <bharata@linux.vnet.ibm.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Power ISA 3.0 introduces a few quadruple precision floating point
instructions that support round-to-odd rounding mode. The
round-to-odd mode is explained as under:
Let Z be the intermediate arithmetic result or the operand of a convert
operation. If Z can be represented exactly in the target format, the
result is Z. Otherwise the result is either Z1 or Z2 whichever is odd.
Here Z1 and Z2 are the next larger and smaller numbers representable
in the target format respectively.
Signed-off-by: Bharata B Rao <bharata@linux.vnet.ibm.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Programs run under qemu-ppc64 on an x86_64 host currently segfault
if they use pthread_create() due to the adjustment made to the NIP in
commit bd6fefe71c.
This patch changes cpu_loop() to set the NIP back to the
pre-incremented value before calling do_syscall(), which causes the
correct address to be used for the new thread and corrects the fault.
Signed-off-by: Sam Bobroff <sam.bobroff@au1.ibm.com>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Use the available wait instruction implementation.
Signed-off-by: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
slbsync: SLB Synchoronize
The instruction provides an ordering function for the effects of all
slbieg instructions executed by the thread executing the slbsync
instruction.
Signed-off-by: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Kevin Wolf
John Snow
Nir Soffer
Jeff Cody
Peter Maydell
Gerd Hoffmann
Li Qiang
Marc-André Lureau
Thomas Huth
Alex Zuepke
Sam Bobroff
Igor Mammedov
Suraj Jitindar Singh
Bharata B Rao
Laurent Vivier
Nikunj A Dadhania