When trying to "device_add bcm2837" on a machine that is not suitable for
this device, you can quickly crash QEMU afterwards, e.g. with "info qtree":
echo "{'execute':'qmp_capabilities'} {'execute':'device_add', " \
"'arguments':{'driver':'bcm2837'}} {'execute': 'human-monitor-command', " \
"'arguments': {'command-line': 'info qtree'}}" | \
aarch64-softmmu/qemu-system-aarch64 -M integratorcp,accel=qtest -S -qmp stdio
{"QMP": {"version": {"qemu": {"micro": 50, "minor": 12, "major": 2},
"package": "build-all"}, "capabilities": []}}
{"return": {}}
{"error": {"class": "GenericError", "desc": "Device 'bcm2837' can not be
hotplugged on this machine"}}
Segmentation fault (core dumped)
The qdev_set_parent_bus() from instance_init adds a link to the child devices
which is not valid anymore after the bcm2837 instance has been destroyed.
Unfortunately, the child devices do not get destroyed / unlinked correctly
because both object_initialize() and object_property_add_child() increase
the reference count of the child objects by one, but only one reference
is dropped when the parent gets removed. So let's use the new functions
object_initialize_child() and sysbus_init_child_obj() instead to create
the objects, which will take care of creating the child objects with the
correct reference count of one.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-id: 1531745974-17187-4-git-send-email-thuth@redhat.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
A lot of functions are initializing an object and attach it immediately
afterwards to the system bus. Provide a common function for this, which
also uses object_initialize_child() to make sure that the reference
counter is correctly initialized to 1 afterwards.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-id: 1531745974-17187-3-git-send-email-thuth@redhat.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
A lot of code is using the object_initialize() function followed by a call
to object_property_add_child() to add the newly initialized object as a child
of the current object. Both functions increase the reference counter of the
new object, but many spots that call these two functions then forget to drop
one of the superfluous references. So the newly created object is often not
cleaned up correctly when the parent is destroyed. In the worst case, this
can cause crashes, e.g. because device objects are not correctly removed from
their parent_bus.
Since this is a common pattern between many code spots, let's introduce a
new function that takes care of calling all three required initialization
functions, first object_initialize(), then object_property_add_child() and
finally object_unref(). And since the function does a similar job like
object_new_with_props(), also allow to set additional properties via
varargs, and use user_creatable_complete() to make sure that the functions
can be used similarly.
And while we're at object.h, also fix some copy-n-paste errors in the
comments there ("to store the area" --> "to store the error").
Signed-off-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
Message-id: 1531745974-17187-2-git-send-email-thuth@redhat.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
The file descriptor for /sys/power/state was never closed. Reported
by Coverity.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
'driver' is leaked when the loop is not broken.
Leak introduced by commit 743c71d03c,
spotted by ASAN.
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
* accel/tcg: Use correct test when looking in victim TLB for code
* bcm2835_aux: Swap RX and TX interrupt assignments
* hw/arm/bcm2836: Mark the bcm2836 / bcm2837 devices with user_creatable = false
* hw/intc/arm_gic: Fix handling of GICD_ITARGETSR
* hw/intc/arm_gic: Check interrupt number in gic_deactivate_irq()
* aspeed: Implement write-1-{set, clear} for AST2500 strapping
* target/arm: Fix LD1W and LDFF1W (scalar plus vector)
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Merge remote-tracking branch 'remotes/pmaydell/tags/pull-target-arm-20180716' into staging
target-arm queue:
* accel/tcg: Use correct test when looking in victim TLB for code
* bcm2835_aux: Swap RX and TX interrupt assignments
* hw/arm/bcm2836: Mark the bcm2836 / bcm2837 devices with user_creatable = false
* hw/intc/arm_gic: Fix handling of GICD_ITARGETSR
* hw/intc/arm_gic: Check interrupt number in gic_deactivate_irq()
* aspeed: Implement write-1-{set, clear} for AST2500 strapping
* target/arm: Fix LD1W and LDFF1W (scalar plus vector)
# gpg: Signature made Mon 16 Jul 2018 17:38:36 BST
# gpg: using RSA key 3C2525ED14360CDE
# gpg: Good signature from "Peter Maydell <peter.maydell@linaro.org>"
# gpg: aka "Peter Maydell <pmaydell@gmail.com>"
# gpg: aka "Peter Maydell <pmaydell@chiark.greenend.org.uk>"
# Primary key fingerprint: E1A5 C593 CD41 9DE2 8E83 15CF 3C25 25ED 1436 0CDE
* remotes/pmaydell/tags/pull-target-arm-20180716:
accel/tcg: Assert that tlb fill gave us a valid TLB entry
accel/tcg: Use correct test when looking in victim TLB for code
bcm2835_aux: Swap RX and TX interrupt assignments
hw/arm/bcm2836: Mark the bcm2836 / bcm2837 devices with user_creatable = false
hw/intc/arm_gic: Fix handling of GICD_ITARGETSR
hw/intc/arm_gic: Check interrupt number in gic_deactivate_irq()
aspeed: Implement write-1-{set, clear} for AST2500 strapping
target/arm: Fix LD1W and LDFF1W (scalar plus vector)
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
In commit 4b1a3e1e34 we added a check for whether the TLB entry
we had following a tlb_fill had the INVALID bit set. This could
happen in some circumstances because a stale or wrong TLB entry was
pulled out of the victim cache. However, after commit
68fea03855 (which prevents stale entries being in the victim
cache) and the previous commit (which ensures we don't incorrectly
hit in the victim cache)) this should never be possible.
Drop the check on TLB_INVALID_MASK from the "is this a TLB_RECHECK?"
condition, and instead assert that the tlb fill procedure has given
us a valid TLB entry (or longjumped out with a guest exception).
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20180713141636.18665-3-peter.maydell@linaro.org
In get_page_addr_code(), we were incorrectly looking in the victim
TLB for an entry which matched the target address for reads, not
for code accesses. This meant that we could hit on a victim TLB
entry that indicated that the address was readable but not
executable, and incorrectly bypass the call to tlb_fill() which
should generate the guest MMU exception. Fix this bug.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20180713141636.18665-2-peter.maydell@linaro.org
RX and TX interrupt bits were reversed, resulting in an endless sequence
of serial interupts in the emulated system and the following repeated
error message when booting Linux.
serial8250: too much work for irq61
This results in a boot failure most of the time.
Qemu command line used to reproduce the problem:
qemu-system-aarch64 -M raspi3 -m 1024 \
-kernel arch/arm64/boot/Image \
--append "rdinit=/sbin/init console=ttyS1,115200"
-initrd rootfs.cpio \
-dtb arch/arm64/boot/dts/broadcom/bcm2837-rpi-3-b.dtb \
-nographic -monitor null -serial null -serial stdio
This is with arm64:defconfig. The root file system was generated using
buildroot.
NB that this error likely arises from an erratum in the
BCM2835 datasheet where the TX and RX bits were swapped
in the AU_MU_IER_REG description (but correct for IIR):
https://elinux.org/BCM2835_datasheet_errata#p12
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Message-id: 1529355846-25102-1-git-send-email-linux@roeck-us.net
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
[PMM: added NB about datasheet]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
These devices are currently causing some problems when a user is trying
to hot-plug or introspect them during runtime. Since these devices can
not be instantiated by the user at all (they need to be wired up in code
instead), we should mark them with user_creatable = false anyway, then we
avoid at least the crashes with the hot-plugging. The introspection problem
will be handled by a separate patch.
Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-id: 1531415537-26037-1-git-send-email-thuth@redhat.com
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
The GICD_ITARGETSR implementation still has some 11MPCore behaviour
that we were incorrectly using in our GICv1 and GICv2 implementations
for the case where the interrupt number is less than GIC_INTERNAL.
The desired behaviour here is:
* for 11MPCore: RAZ/WI for irqs 0..28; read a number matching the
CPU doing the read for irqs 29..31
* for GICv1 and v2: RAZ/WI if uniprocessor; otherwise read a
number matching the CPU doing the read for all irqs < 32
Stop squashing GICD_ITARGETSR to 0 for IRQs 0..28 unless this
is an 11MPCore GIC.
Reported-by: Jan Kiszka <jan.kiszka@web.de>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Luc Michel <luc.michel@greensocs.com>
Message-id: 20180712154152.32183-3-peter.maydell@linaro.org
In gic_deactivate_irq() the interrupt number comes from the guest
(on a write to the GICC_DIR register), so we need to sanity check
that it isn't out of range before we use it as an array index.
Handle this in a similar manner to the check we do in
gic_complete_irq() for the GICC_EOI register.
The array overrun is not disastrous because the calling code
uses (value & 0x3ff) to extract the interrupt field, so the
only out-of-range values possible are 1020..1023, which allow
overrunning only from irq_state[] into the following
irq_target[] array which the guest can already manipulate.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Luc Michel <luc.michel@greensocs.com>
Message-id: 20180712154152.32183-2-peter.maydell@linaro.org
The AST2500 SoC family changes the runtime behaviour of the hardware
strapping register (SCU70) to write-1-set/write-1-clear, with
write-1-clear implemented on the "read-only" SoC revision register
(SCU7C). For the the AST2400, the hardware strapping is
runtime-configured with read-modify-write semantics.
Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
Reviewed-by: Joel Stanley <joel@jms.id.au>
Message-id: 20180709143524.17480-1-andrew@aj.id.au
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
'I' was being double-incremented; correctly within the inner loop
and incorrectly within the outer loop.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Laurent Desnogues <laurent.desnogues@gmail.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Tested-by: Alex Bennée <alex.bennee@linaro.org>
Message-id: 20180711103957.3040-1-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
There is a race condition during hotplug when iothread is used. It
occurs because virtio-scsi may be processing command queues in the
iothread while the monitor performs SCSI device hotplug.
When a SCSI device is hotplugged the HotplugHandler->plug() callback is
invoked and virtio-scsi emits a rescan event to the guest.
If the guest submits a SCSI command at this point then it may be
cancelled before hotplug completes. This happens because ->reset() is
called by hw/core/qdev.c:device_set_realized() after
HotplugHandler->plug() has been called and
hw/scsi/scsi-disk.c:scsi_disk_reset() purges all requests.
This patch uses the new HotplugHandler->post_plug() callback to emit the
rescan event after ->reset(). This eliminates the race conditions where
requests could be cancelled.
Reported-by: l00284672 <lizhengui@huawei.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Fam Zheng <famz@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-Id: <20180716083732.3347-3-stefanha@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
The ->pre_plug() callback is invoked before the device is realized. The
->plug() callback is invoked when the device is being realized but
before it is reset.
This patch adds a ->post_plug() callback which is invoked after the
device has been reset. This callback is needed by HotplugHandlers that
need to wait until after ->reset().
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-Id: <20180716083732.3347-2-stefanha@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This fixes several problems I found in the UART serial implementation.
Now all divisor values are allowed, while before divisor values of zero
and below the base baud rate were rejected. All changes are in reference
to http://www.sci.muni.cz/docs/pc/serport.txt
Signed-off-by: Calvin Lee <cyrus296@gmail.com>
Message-Id: <20180512000545.966-2-cyrus296@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
server->bus in _test_server_free() could be NULL, since TestServer
*dest in test_migrate() was not properly initialized like TestServer *s.
Added init_virtio_dev(dest) and uninit_virtio_dev(dest), so the fields
are properly set and when test_server_free(dest); is called, they can
be correctly freed.
The reason for that is init_virtio_dev() calls qpci_init_pc(), that
creates a QPCIBusPC * (returned as QPCIBus *), while test_server_free()
calls qpci_free_pc(), that frees the QPCIBus *. Not calling
init_virtio_dev() would leave the QPCIBus * of TestServer unset.
Problem came out once I modified pci-pc.c and pci-pc.h, modifying
QPCIBusPC by adding another field before QPCIBus bus. Re-running the
tests showed vhost-user-test failing.
Signed-off-by: Emanuele Giuseppe Esposito <e.emanuelegiuseppe@gmail.com>
Message-Id: <1530022733-29581-1-git-send-email-esposem@usi.ch>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Hyper-V identifies vCPUs by Virtual Processor (VP) index which can be
queried by the guest via HV_X64_MSR_VP_INDEX msr. It is defined by the
spec as a sequential number which can't exceed the maximum number of
vCPUs per VM.
It has to be owned by QEMU in order to preserve it across migration.
However, the initial implementation in KVM didn't allow to set this
msr, and KVM used its own notion of VP index. Fortunately, the way
vCPUs are created in QEMU/KVM makes it likely that the KVM value is
equal to QEMU cpu_index.
So choose cpu_index as the value for vp_index, and push that to KVM on
kernels that support setting the msr. On older ones that don't, query
the kernel value and assert that it's in sync with QEMU.
Besides, since handling errors from vCPU init at hotplug time is
impossible, disable vCPU hotplug.
This patch also introduces accessor functions to encapsulate the mapping
between a vCPU and its vp_index.
Signed-off-by: Roman Kagan <rkagan@virtuozzo.com>
Message-Id: <20180702134156.13404-3-rkagan@virtuozzo.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
In Hyper-V-related code, vCPUs are identified by their VP (virtual
processor) index. Since it's customary for "vcpu_id" in QEMU to mean
APIC id, rename the respective variables to "vp_index" to make the
distinction clear.
Signed-off-by: Roman Kagan <rkagan@virtuozzo.com>
Message-Id: <20180702134156.13404-2-rkagan@virtuozzo.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
The typo was found by codespell.
Signed-off-by: Stefan Weil <sw@weilnetz.de>
Message-Id: <20180712194454.26765-1-sw@weilnetz.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This patch adds field with content of KERNEL_GS_BASE MSR to QEMU note in
ELF dump.
On Windows, if all vCPUs are running usermode tasks at the time the dump is
created, this can be helpful in the discovery of guest system structures
during conversion ELF dump to MEMORY.DMP dump.
Signed-off-by: Viktor Prutyanov <viktor.prutyanov@virtuozzo.com>
Message-Id: <20180714123000.11326-1-viktor.prutyanov@virtuozzo.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
When tracepoint handle_qmp_command is enabled, we crash on JSON syntax
errors. Broken in commit 1cc3747152. Fix by skipping the tracepoint
on JSON syntax error. Before the flawed commit, we skipped it by
returning early.
Fixes: CID 1394216
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20180716091012.29510-1-armbru@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Libvirt developers would like to be copied on patches to qemu-doc
appendix "Deprecated features". Do them the favor.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20180716073226.21127-3-armbru@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Consumers of QEMU need to track feature deprecation. Keeping
deprecation documentation in its own file helps in two small ways:
* You can track changes the easy and obvious way, with git-log.
Before, you had to resort to more complex gittery like "git-log
--oneline -L '/@node Deprecated features/,/@node Supported build
platforms/:qemu-doc.texi'"
* It lets us use MAINTAINERS to copy interested parties on deprecation
patches, so they can advise or object before they're a done deal.
The next commit will do that for libvirt.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20180716073226.21127-2-armbru@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Committing to the current --preconfig / exit-preconfig interface
before it has seen any use is premature. Mark both as experimental,
the former in documentation, the latter by renaming it to
x-exit-preconfig.
See the previous commit for more detailed rationale.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20180705091402.26244-3-armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Acked-by: Eduardo Habkost <ehabkost@redhat.com>
Acked-by: Igor Mammedov <imammedo@redhat.com>
[Straightforward conflict with commit 514337c142 resolved]
According to commit 047f7038f5, option --preconfig
[...] allows pausing QEMU in the new RUN_STATE_PRECONFIG state,
allowing the configuration of QEMU from QMP before the machine
jumps into board initialization code of machine_run_board_init()
The intent is to allow management to query machine state and
additionally configure it using previous query results within one
QEMU instance (i.e. eliminate the need to start QEMU twice, 1st to
query board specific parameters and 2nd for actual VM start using
query results for additional parameters).
The implementation is a bit of a hack: it splices in an additional
main loop before machine creation, in special runstate preconfig. New
command exit-preconfig exits that main loop. QEMU continues
initializing, creates the machine, and runs the good old main loop.
The replacement of the main loop is transparent to monitors.
Sadly, some commands expect initialization to be complete. Running
them in --preconfig's main loop violates their preconditions. Since
we don't really know which commands are safe, we use a whitelist.
This drags the concept of run state into the QMP core.
The whitelist is done as a command flag in the QAPI schema (commit
d6fe3d02e9). Drags the concept of run state further into the QAPI
language.
The command flag is exposed in query-qmp-schema (also commit
d6fe3d02e9). This makes it ABI.
I consider the whole thing an offensively ugly hack, but sometimes an
ugly hack is the best we can do to solve a problem people have.
The need described by the commit message quote above is genuine. The
proper solution would be a main loop that permits complete
configuration via QMP. This is out of reach, thus the hack.
However, even though the need is genuine, it isn't urgent: libvirt is
not going to use this anytime soon. Baking a hack into ABI before it
has any users is a bad idea.
This commit reverts the parts of commit d6fe3d02e9 that affect ABI
via query-qmp-schema. The commit did the following:
(1) Add command flag 'allow-preconfig' to the QAPI schema language
(2) Pass it to code generators
(3) Have the commands.py code generator pass it to the command
registry (so commit 047f7038f5 can use it as whitelist)
(4) Add 'allow-preconfig' to SchemaInfoCommand (neglecting to update
qapi-code-gen.txt section "Client JSON Protocol introspection")
(5) Set 'allow-preconfig': true for commands qmp_capabilities,
query-commands, query-command-line-options, query-status
Revert exactly (4), plus a bit of documentation added to
qemu-tech.info in commit 047f7038f5.
Shrinks query-qmp-schema's output from 126.5KiB to 121.8KiB for me.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20180705091402.26244-2-armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Acked-by: Eduardo Habkost <ehabkost@redhat.com>
Acked-by: Igor Mammedov <imammedo@redhat.com>
[Straightforward conflict with commit d626b6c1ae resolved]
Here's my first hard freeze pull request for qemu-3.0. This contains
an assortment of bugfixes. Several are for regressions, others are for
bugs that I think are significant enough to address during hard freeze.
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Merge remote-tracking branch 'remotes/dgibson/tags/ppc-for-3.0-20180716' into staging
ppc patch queue 2018-07-16
Here's my first hard freeze pull request for qemu-3.0. This contains
an assortment of bugfixes. Several are for regressions, others are for
bugs that I think are significant enough to address during hard freeze.
# gpg: Signature made Mon 16 Jul 2018 09:28:37 BST
# gpg: using RSA key 6C38CACA20D9B392
# 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-3.0-20180716:
sm501: Fix warning about unreachable code
sam460ex: Correct use after free error
etsec: fix IRQ (un)masking
ppc/xics: fix ICP reset path
spapr: Correct inverted test in spapr_pc_dimm_node()
sm501: Update screen on frame buffer address change
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Coverity warned that the false arm of conditional expression is
unreachable when it is inside an if with the same condition.
Remove the unreachable code to avoid the warning.
Fixes: CID 1394215
Reported-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Commit 51b0d834c changed error handling to report file name in error
message but forgot to move freeing it after usage. Noticed by Coverity.
Fixes: CID 1394217
Reported-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Interrupt conditions occurring while masked are not being
signaled when later unmasked.
The fix is to raise/lower IRQs when IMASK is changed.
To avoid problems like this in future, consolidate
IRQ pin update logic in one function.
Also fix probable typo "IEVENT_TXF | IEVENT_TXF",
and update IRQ pins on reset.
Signed-off-by: Michael Davidsaver <mdavidsaver@gmail.com>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Recent cleanup in commit a028dd423e dropped the ICPStateClass::reset
handler. It is now up to child ICP classes to call the DeviceClass::reset
handler of the parent class, thanks to device_class_set_parent_reset().
This is a better object programming pattern, but unfortunately it causes
QEMU to crash during CPU hotplug:
(qemu) device_add host-spapr-cpu-core,id=core1,core-id=1
Segmentation fault (core dumped)
When the hotplug path tries to reset the ICP device, we end up calling:
static void icp_kvm_reset(DeviceState *dev)
{
ICPStateClass *icpc = ICP_GET_CLASS(dev);
icpc->parent_reset(dev);
but icpc->parent_reset is NULL... This happens because icp_kvm_class_init()
calls:
device_class_set_parent_reset(dc, icp_kvm_reset,
&icpc->parent_reset);
but dc->reset, ie, DeviceClass::reset for the TYPE_ICP type, is
itself NULL.
This patch hence sets DeviceClass::reset for the TYPE_ICP type to
point to icp_reset(). It then registers a reset handler that calls
DeviceClass::reset. If the ICP subtype has configured its own reset
handler with device_class_set_parent_reset(), this ensures it will
be called first and it can then call ICPStateClass::parent_reset
safely. This fixes the reset path for the TYPE_KVM_ICP type, which
is the only subtype that defines its own reset function.
Reported-by: Satheesh Rajendran <sathnaga@linux.vnet.ibm.com>
Suggested-by: David Gibson <david@gibson.dropbear.id.au>
Fixes: a028dd423e
Signed-off-by: Greg Kurz <groug@kaod.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This function was introduced between v2.11 and v2.12 to replace obsolete
ways of specifying the NUMA nodes for DIMMs. It's used to find the correct
node for an LMB, by locating which DIMM object it lies within.
Unfortunately, one of the checks is inverted, so we check whether the
address is less than two different things, rather than actually checking
a range. This introduced a regression, meaning that after a reboot qemu
will advertise incorrect node information for memory to the guest.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: Greg Kurz <groug@kaod.org>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
When the guest changes the address of the frame buffer we need to
refresh the screen to correctly display the new content. This fixes
display update problems when changing between screens on AmigaOS.
Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
If this is not done, qemu would drop any control message after the first
one.
This is because glibc's `CMSG_NXTHDR` macro accesses the uninitialized
cmsghdr's length field in order to find out if the message fits into the
`msg_control` buffer, wrongly assuming that it doesn't because the
length field contains garbage. Accessing the length field is fine for
completed messages we receive from the kernel, but is - as far as I know
- not needed since the kernel won't return such an invalid cmsghdr in
the first place.
This is tracked as this glibc bug:
https://sourceware.org/bugzilla/show_bug.cgi?id=13500
It's probably also a good idea to bail with an error if `CMSG_NXTHDR`
returns NULL but `TARGET_CMSG_NXTHDR` doesn't (ie. we still expect
cmsgs).
Signed-off-by: Jonas Schievink <jonasschievink@gmail.com>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20180711221244.31869-1-jonasschievink@gmail.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
The value given by mmap_find_vma_reserved() is used with mmap(),
so it is needed to be aligned with the host page size.
Since commit 18e80c55bb, reserved_va is only aligned to TARGET_PAGE_SIZE,
and it works well if this size is greater or equal to the host page size.
But ppc64 hosts have 64kB page size and when we start a 4kiB page size
guest (like i386), it fails when it tries to mmap the stack:
mmap stack: Invalid argument
Fixes: 18e80c55bb (linux-user: Tidy and enforce reserved_va initialization)
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20180714193553.30846-1-laurent@vivier.eu>
Commit 435da5e709 didn't convert a fcntl() call to safe_fcntl()
for TARGET_NR_fcntl64 case. There is no reason to not use it
in this case.
Fixes: 435da5e709 linux-user: Use safe_syscall wrapper for fcntl
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20180713125805.10749-1-laurent@vivier.eu>
Qemu includes the glibc headers for the host defines and target headers are
part of the qemu source themselves. The glibc has the F_GETLK64, F_SETLK64
and F_SETLKW64 defined to 12, 13 and 14 for all archs in
sysdeps/unix/sysv/linux/bits/fcntl-linux.h. The linux kernel generic
definition for F_*LK is 5, 6 & 7 and F_*LK64* is 12,13, and 14 as seen in
include/uapi/asm-generic/fcntl.h. On 64bit machine, by default the kernel
assumes all F_*LK to 64bit calls and doesnt support use of F_*LK64* as
can be seen in include/linux/fcntl.h in linux source.
On x86_64 host, the values for F_*LK64* are set to 5, 6 and 7
explicitly in /usr/include/x86_64-linux-gnu/bits/fcntl.h by the glibc.
Whereas, a PPC64 host doesn't have such a definition in
/usr/include/powerpc64le-linux-gnu/bits/fcntl.h by the glibc. So,
the sources on PPC64 host sees the default value of F_*LK64*
as 12, 13 & 14(fcntl-linux.h).
Since the 64bit kernel doesnt support 12, 13 & 14; the glibc fcntl syscall
implementation(__libc_fcntl*(), __fcntl64_nocancel) does the F_*LK64* value
convertion back to F_*LK* values on PPC64 as seen in
sysdeps/unix/sysv/linux/powerpc/powerpc64/sysdep.h with FCNTL_ADJUST_CMD()
macro. Whereas on x86_64 host the values for F_*LK64* are set to 5, 6 and 7
and no adjustments are needed.
Since qemu doesnt use the glibc fcntl, but makes the safe_syscall* on its
own, the PPC64 qemu is calling the syscall with 12, 13, and 14(without
adjustment) and they all fail. The fcntl calls to F_GETLK/F_SETLK|W all
fail by all pplications run on PPC64 host user emulation.
The fix here could be to see why on PPC64 the glibc is still keeping
F_*LK64* different from F_*LK and why adjusting them to 5, 6 and 7 before
the syscall for PPC only. See if we can make the
/usr/include/powerpc64le-linux-gnu/bits/fcntl.h to have the values
5, 6 & 7 just like x86_64 and remove the adjustment code in glibc. That
way, qemu sources see the kernel supported values in glibc headers.
OR
On PPC64 host, qemu sources see both F_*LK & F_*LK64* as same and set to
12, 13 and 14 because __USE_FILE_OFFSET64 is defined in qemu
sources(also refer sysdeps/unix/sysv/linux/bits/fcntl-linux.h).
Do the value adjustment just like it is done by glibc source by using
F_GETLK value of 5. That way, we make the syscalls with the actual
supported values in Qemu. The patch is taking this approach.
Signed-off-by: Shivaprasad G Bhat <sbhat@linux.vnet.ibm.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <153148521235.87746.14142430397318741182.stgit@lep8c.aus.stglabs.ibm.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Signed-off-by: Ville Skyttä <ville.skytta@iki.fi>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-id: 20180612065150.21110-1-ville.skytta@iki.fi
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
We currently don't enforce that the sparse segments we detect during convert are
aligned. This leads to unnecessary and costly read-modify-write cycles either
internally in Qemu or in the background on the storage device as nearly all
modern filesystems or hardware have a 4k alignment internally.
This patch modifies is_allocated_sectors so that its *pnum result will always
end at an alignment boundary. This way all requests will end at an alignment
boundary. The start of all requests will also be aligned as long as the results
of get_block_status do not lead to an unaligned offset.
The number of RMW cycles when converting an example image [1] to a raw device that
has 4k sector size is about 4600 4k read requests to perform a total of about 15000
write requests. With this path the additional 4600 read requests are eliminated while
the number of total write requests stays constant.
[1] https://cloud-images.ubuntu.com/releases/16.04/release/ubuntu-16.04-server-cloudimg-amd64-disk1.vmdk
Signed-off-by: Peter Lieven <pl@kamp.de>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
The current BDC VPD page (page 0xb1) is too short. This can be
seen running sg_utils:
$ sg_vpd --page=bdc /dev/sda
Block device characteristics VPD page (SBC):
Block device characteristics VPD page length too short=8
By the SCSI spec, the expected size of the SBC page is 0x40.
There is no telling how the guest will behave with a shorter
message - it can ignore it, or worse, make (wrong)
assumptions.
This patch fixes the emulation by setting the size to 0x40.
This is the output of the previous sg_vpd command after
applying it:
$ sg_vpd --page=bdc /dev/sda -v
inquiry cdb: 12 01 b1 00 fc 00
Block device characteristics VPD page (SBC):
[PQual=0 Peripheral device type: disk]
Medium rotation rate is not reported
Product type: Not specified
WABEREQ=0
WACEREQ=0
Nominal form factor not reported
FUAB=0
VBULS=0
To improve readability, this patch also adds the VBULS value
explictly and add comments on the existing fields we're
setting.
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Test that we're rejecting what we ought to for file,
host_driver and host_cdrom drivers. Test that we're
seeing the deprecated message for block and chardevs
on the file driver.
Signed-off-by: John Snow <jsnow@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Adjust each caller of raw_open_common to specify if they are expecting
host and character devices or not. Tighten expectations of file types upon
open in the common code and refuse types that are not expected.
This has two effects:
(1) Character and block devices are now considered deprecated for the
'file' driver, which expects only S_IFREG, and
(2) no file-posix driver (file, host_cdrom, or host_device) can open
directories now.
I don't think there's a legitimate reason to open directories as if
they were files. This prevents QEMU from opening and attempting to probe
a directory inode, which can break in exciting ways. One of those ways
is lseek on ext4/xfs, which will return 0x7fffffffffffffff as the file
size instead of EISDIR. This can coax QEMU into responding with a
confusing "file too big" instead of "Hey, that's not a file".
See: https://bugs.launchpad.net/qemu/+bug/1739304/
Signed-off-by: John Snow <jsnow@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Explicitly enabling zero detection or compression suppresses copy
offloading during convert. Document it.
Suggested-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Fam Zheng <famz@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
197 is one example where _make_test_img is used twice without stopping
the NBD server in between. An error will occur like this:
@@ -26,9 +26,13 @@
=== Partial final cluster ===
+qemu-img: TEST_DIR/t.IMGFMT: Failed to get "resize" lock
+Is another process using the image?
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1024
+Failed to find an available port: Address already in use
read 1024/1024 bytes at offset 0
Patch _make_test_img to stop the old qemu-nbd before starting a new one,
which fixes this problem, and similarly 215.
Signed-off-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
