Reimplement qemu_register_reset() via qemu_register_resettable().
We define a new LegacyReset object which implements Resettable and
defines its reset hold phase method to call a QEMUResetHandler
function. When qemu_register_reset() is called, we create a new
LegacyReset object and add it to the simulation_reset
ResettableContainer. When qemu_unregister_reset() is called, we find
the LegacyReset object in the container and remove it.
This implementation of qemu_unregister_reset() means we'll end up
scanning the ResetContainer's list of child objects twice, once
to find the LegacyReset object, and once in g_ptr_array_remove().
In theory we could avoid this by having the ResettableContainer
interface include a resettable_container_remove_with_equal_func()
that took a callback method so that we could use
g_ptr_array_find_with_equal_func() and g_ptr_array_remove_index().
But we don't expect qemu_unregister_reset() to be called frequently
or in hot paths, and we expect the simulation_reset container to
usually not have many children.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Message-id: 20240220160622.114437-9-peter.maydell@linaro.org
Reviewed-by: Zhao Liu <zhao1.liu@intel.com>
Implement new functions qemu_register_resettable() and
qemu_unregister_resettable(). These are intended to be
three-phase-reset aware equivalents of the old qemu_register_reset()
and qemu_unregister_reset(). Instead of passing in a function
pointer and opaque, you register any QOM object that implements the
Resettable interface.
The implementation is simple: we have a single global instance of a
ResettableContainer, which we reset in qemu_devices_reset(), and
the Resettable objects passed to qemu_register_resettable() are
added to it.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Message-id: 20240220160622.114437-8-peter.maydell@linaro.org
Reviewed-by: Zhao Liu <zhao1.liu@intel.com>
Add the usual boilerplate license/copyright comment to reset.h (using
the text from reset.c), and document the existing functions.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Message-id: 20240220160622.114437-6-peter.maydell@linaro.org
- Update x86 CPU model docs and script
- Add missing close of chardev QIOChannel
- More trace events o nTKS handshake
- Drop unsafe VNC constants
- Increase NOFILE limit during startup
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Merge tag 'misc-fixes-pull-request' of https://gitlab.com/berrange/qemu into staging
- LUKS support for detached headers
- Update x86 CPU model docs and script
- Add missing close of chardev QIOChannel
- More trace events o nTKS handshake
- Drop unsafe VNC constants
- Increase NOFILE limit during startup
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# gpg: Signature made Fri 09 Feb 2024 14:04:05 GMT
# gpg: using RSA key DAF3A6FDB26B62912D0E8E3FBE86EBB415104FDF
# gpg: Good signature from "Daniel P. Berrange <dan@berrange.com>" [full]
# gpg: aka "Daniel P. Berrange <berrange@redhat.com>" [full]
# Primary key fingerprint: DAF3 A6FD B26B 6291 2D0E 8E3F BE86 EBB4 1510 4FDF
* tag 'misc-fixes-pull-request' of https://gitlab.com/berrange/qemu:
tests: Add case for LUKS volume with detached header
crypto: Introduce 'detached-header' field in QCryptoBlockInfoLUKS
block: Support detached LUKS header creation using qemu-img
block: Support detached LUKS header creation using blockdev-create
crypto: Modify the qcrypto_block_create to support creation flags
qapi: Make parameter 'file' optional for BlockdevCreateOptionsLUKS
crypto: Support LUKS volume with detached header
io: add trace event when cancelling TLS handshake
chardev: close QIOChannel before unref'ing
docs: re-generate x86_64 ABI compatibility CSV
docs: fix highlighting of CPU ABI header rows
scripts: drop comment about autogenerated CPU API file
softmmu: remove obsolete comment about libvirt timeouts
ui: drop VNC feature _MASK constants
qemu_init: increase NOFILE soft limit on POSIX
crypto: Introduce SM4 symmetric cipher algorithm
meson: sort C warning flags alphabetically
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
In many configurations, e.g. multiple vNICs with multiple queues or
with many Ceph OSDs, the default soft limit of 1024 is not enough.
QEMU is supposed to work fine with file descriptors >= 1024 and does
not use select() on POSIX. Bump the soft limit to the allowed hard
limit to avoid issues with the aforementioned configurations.
Of course the limit could be raised from the outside, but the man page
of systemd.exec states about 'LimitNOFILE=':
> Don't use.
> [...]
> Typically applications should increase their soft limit to the hard
> limit on their own, if they are OK with working with file
> descriptors above 1023,
If the soft limit is already the same as the hard limit, avoid the
superfluous setrlimit call. This can avoid a warning with a strict
seccomp filter blocking setrlimit if NOFILE was already raised before
executing QEMU.
Buglink: https://bugzilla.proxmox.com/show_bug.cgi?id=4507
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Fiona Ebner <f.ebner@proxmox.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
A memory page poisoned from the hypervisor level is no longer readable.
The migration of a VM will crash Qemu when it tries to read the
memory address space and stumbles on the poisoned page with a similar
stack trace:
Program terminated with signal SIGBUS, Bus error.
#0 _mm256_loadu_si256
#1 buffer_zero_avx2
#2 select_accel_fn
#3 buffer_is_zero
#4 save_zero_page
#5 ram_save_target_page_legacy
#6 ram_save_host_page
#7 ram_find_and_save_block
#8 ram_save_iterate
#9 qemu_savevm_state_iterate
#10 migration_iteration_run
#11 migration_thread
#12 qemu_thread_start
To avoid this VM crash during the migration, prevent the migration
when a known hardware poison exists on the VM.
Signed-off-by: William Roche <william.roche@oracle.com>
Link: https://lore.kernel.org/r/20240130190640.139364-2-william.roche@oracle.com
Signed-off-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <20231208113529.74067-7-philmd@linaro.org>
Rather than having to lookup for what the 0, 1, 2, ...
icount values are, use a enum definition.
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-ID: <20231208113529.74067-4-philmd@linaro.org>
Following the example documented since commit e3fe3988d7 ("error:
Document Error API usage rules"), have icount_configure()
return a boolean indicating whether an error is set or not.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <20231208113529.74067-2-philmd@linaro.org>
This allows passing the KVM device node to use as a file
descriptor via /dev/fdset/XX. Passing the device node to
use as a file descriptor allows running qemu unprivileged
even when the user running qemu is not in the kvm group
on distributions where access to /dev/kvm is gated behind
membership of the kvm group (as long as the process invoking
qemu is able to open /dev/kvm and passes the file descriptor
to qemu).
Signed-off-by: Daan De Meyer <daan.j.demeyer@gmail.com>
Message-ID: <20231021134015.1119597-1-daan.j.demeyer@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
- add a 32 bit x86 replay test case
- fix some typos
- use modern snapshot setting for tests
- update replay_dump for current ABI
- remove stale replay variables
- improve kdoc for ReplayState
- introduce common error path for replay
- always fully drain chardevs when in replay
- catch unexpected waitio on playback
- remove flaky tags from replay_kernel tests
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Merge tag 'pull-replay-fixes-080124-1' of https://gitlab.com/stsquad/qemu into staging
Record/replay fixes for replay_kernel tests
- add a 32 bit x86 replay test case
- fix some typos
- use modern snapshot setting for tests
- update replay_dump for current ABI
- remove stale replay variables
- improve kdoc for ReplayState
- introduce common error path for replay
- always fully drain chardevs when in replay
- catch unexpected waitio on playback
- remove flaky tags from replay_kernel tests
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# gpg: Signature made Mon 08 Jan 2024 14:03:04 GMT
# gpg: using RSA key 6685AE99E75167BCAFC8DF35FBD0DB095A9E2A44
# gpg: Good signature from "Alex Bennée (Master Work Key) <alex.bennee@linaro.org>" [full]
# Primary key fingerprint: 6685 AE99 E751 67BC AFC8 DF35 FBD0 DB09 5A9E 2A44
* tag 'pull-replay-fixes-080124-1' of https://gitlab.com/stsquad/qemu:
tests/avocado: remove skips from replay_kernel
chardev: force write all when recording replay logs
replay: stop us hanging in rr_wait_io_event
replay/replay-char: use report_sync_error
replay: introduce a central report point for sync errors
replay: make has_unread_data a bool
replay: add proper kdoc for ReplayState
replay: remove host_clock_last
scripts/replay_dump: track total number of instructions
scripts/replay-dump: update to latest format
tests/avocado: modernise the drive args for replay_linux
tests/avocado: fix typo in replay_linux
tests/avocado: add a simple i386 replay kernel test
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
A lot of the hang I see are when we end up spinning in
rr_wait_io_event for an event that will never come in playback. As a
new check functions which can see if we are in PLAY mode and kick us
us the wait function so the event can be processed.
This fixes most of the failures in replay_kernel.py
Fixes: https://gitlab.com/qemu-project/qemu/-/issues/2013
Cc: Pavel Dovgalyuk <pavel.dovgaluk@ispras.ru>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20231211091346.14616-12-alex.bennee@linaro.org>
Coverity reports a concurrent data access violation because be->users
is being accessed in iommufd_backend_can_be_deleted() without holding
the mutex.
However, these routines are called from the QEMU main thread when a
device is created. In this case, the code paths should be protected by
the BQL lock and it should be safe to drop the IOMMUFD backend mutex.
Simply remove it.
Fixes: CID 1531550
Fixes: CID 1531549
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
Signed-off-by: Cédric Le Goater <clg@redhat.com>
- Unify CPU QOM type checks (Gavin)
- Simplify uses of some CPU related property (Philippe)
(start-powered-off, ARM reset-cbar and mp-affinity)
- Header and documentation cleanups (Zhao, Philippe)
- Have Memory API return boolean indicating possible error
- Fix frame filter mask in CAN sja1000 model (Pavel)
- QOM embed MCF5206 timer into SoC (Thomas)
- Simplify LEON3 qemu_irq_ack handler (Clément)
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Merge tag 'hw-cpus-20240105' of https://github.com/philmd/qemu into staging
HW core patch queue
- Unify CPU QOM type checks (Gavin)
- Simplify uses of some CPU related property (Philippe)
(start-powered-off, ARM reset-cbar and mp-affinity)
- Header and documentation cleanups (Zhao, Philippe)
- Have Memory API return boolean indicating possible error
- Fix frame filter mask in CAN sja1000 model (Pavel)
- QOM embed MCF5206 timer into SoC (Thomas)
- Simplify LEON3 qemu_irq_ack handler (Clément)
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# gpg: Signature made Fri 05 Jan 2024 15:41:16 GMT
# gpg: using RSA key FAABE75E12917221DCFD6BB2E3E32C2CDEADC0DE
# gpg: Good signature from "Philippe Mathieu-Daudé (F4BUG) <f4bug@amsat.org>" [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: FAAB E75E 1291 7221 DCFD 6BB2 E3E3 2C2C DEAD C0DE
* tag 'hw-cpus-20240105' of https://github.com/philmd/qemu: (71 commits)
target/sparc: Simplify qemu_irq_ack
hw/net/can/sja1000: fix bug for single acceptance filter and standard frame
hw/m68k/mcf5206: Embed m5206_timer_state in m5206_mbar_state
hw/pci-host/raven: Propagate error in raven_realize()
hw/nvram: Simplify memory_region_init_rom_device() calls
hw/misc: Simplify memory_region_init_ram_from_fd() calls
hw/sparc: Simplify memory_region_init_ram_nomigrate() calls
hw/arm: Simplify memory_region_init_rom() calls
hw: Simplify memory_region_init_ram() calls
misc: Simplify qemu_prealloc_mem() calls
util/oslib: Have qemu_prealloc_mem() handler return a boolean
backends: Reduce variable scope in host_memory_backend_memory_complete
backends: Have HostMemoryBackendClass::alloc() handler return a boolean
backends: Simplify host_memory_backend_memory_complete()
backends: Use g_autofree in HostMemoryBackendClass::alloc() handlers
memory: Have memory_region_init_ram_from_fd() handler return a boolean
memory: Have memory_region_init_ram_from_file() handler return a boolean
memory: Have memory_region_init_resizeable_ram() return a boolean
memory: Have memory_region_init_rom_device() handler return a boolean
memory: Simplify memory_region_init_rom_device_nomigrate() calls
...
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Following the example documented since commit e3fe3988d7 ("error:
Document Error API usage rules"), have HostMemoryBackendClass::alloc
return a boolean indicating whether an error is set or not.
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
Reviewed-by: Gavin Shan <gshan@redhat.com>
Message-Id: <20231120213301.24349-17-philmd@linaro.org>
Currently, a vm in the suspended state is not completely stopped. The VCPUs
have been paused, but the cpu clock still runs, and runstate notifiers for
the transition to stopped have not been called. This causes problems for
live migration. Stale cpu timers_state is saved to the migration stream,
causing time errors in the guest when it wakes from suspend, and state that
would have been modified by runstate notifiers is wrong.
Modify vm_stop to completely stop the vm if the current state is suspended,
transition to RUN_STATE_PAUSED, and remember that the machine was suspended.
Modify vm_start to restore the suspended state.
This affects all callers of vm_stop and vm_start, notably, the qapi stop and
cont commands:
old behavior:
RUN_STATE_SUSPENDED --> stop --> RUN_STATE_SUSPENDED
new behavior:
RUN_STATE_SUSPENDED --> stop --> RUN_STATE_PAUSED
RUN_STATE_PAUSED --> cont --> RUN_STATE_SUSPENDED
For example:
(qemu) info status
VM status: paused (suspended)
(qemu) stop
(qemu) info status
VM status: paused
(qemu) system_wakeup
Error: Unable to wake up: guest is not in suspended state
(qemu) cont
(qemu) info status
VM status: paused (suspended)
(qemu) system_wakeup
(qemu) info status
VM status: running
Suggested-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Steve Sistare <steven.sistare@oracle.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Link: https://lore.kernel.org/r/1704312341-66640-3-git-send-email-steven.sistare@oracle.com
Signed-off-by: Peter Xu <peterx@redhat.com>
* Some header clean-ups by Philippe
* Restrict type names to alphanumerical range (and a few special characters)
* Fix analyze-migration.py script on s390x
* Clean up and improve some tests
* Document handling of commas in CLI options parameters
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Merge tag 'pull-request-2023-12-20' of https://gitlab.com/thuth/qemu into staging
* Add compat machines for QEMU 9.0
* Some header clean-ups by Philippe
* Restrict type names to alphanumerical range (and a few special characters)
* Fix analyze-migration.py script on s390x
* Clean up and improve some tests
* Document handling of commas in CLI options parameters
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# gpg: Signature made Wed 20 Dec 2023 04:36:11 EST
# gpg: using RSA key 27B88847EEE0250118F3EAB92ED9D774FE702DB5
# gpg: issuer "thuth@redhat.com"
# gpg: Good signature from "Thomas Huth <th.huth@gmx.de>" [full]
# gpg: aka "Thomas Huth <thuth@redhat.com>" [full]
# gpg: aka "Thomas Huth <huth@tuxfamily.org>" [full]
# gpg: aka "Thomas Huth <th.huth@posteo.de>" [unknown]
# Primary key fingerprint: 27B8 8847 EEE0 2501 18F3 EAB9 2ED9 D774 FE70 2DB5
* tag 'pull-request-2023-12-20' of https://gitlab.com/thuth/qemu:
tests/unit/test-qmp-event: Replace fixture by global variables
tests/unit/test-qmp-event: Simplify event emission check
tests/unit/test-qmp-event: Drop superfluous mutex
tests/qtest/npcm7xx_pwm-test: Only do full testing in slow mode
qemu-options: Clarify handling of commas in options parameters
tests/qtest/migration-test: Fix analyze-migration.py for s390x
qom/object: Limit type names to alphanumerical and some few special characters
tests/unit/test-io-task: Rename "qemu:dummy" to avoid colon in the name
memory: Remove "qemu:" prefix from the "qemu:ram-discard-manager" type name
hw: Replace anti-social QOM type names (again)
docs/system/arm: Fix for rename of type "xlnx.bbram-ctrl"
target: Restrict 'sysemu/reset.h' to system emulation
hw/s390x/ipl: Remove unused 'exec/exec-all.h' included header
hw/misc/mips_itu: Remove unnecessary 'exec/exec-all.h' header
hw/ppc/spapr_hcall: Remove unused 'exec/exec-all.h' included header
system/qtest: Restrict QTest API to system emulation
system/qtest: Include missing 'hw/core/cpu.h' header
MAINTAINERS: Add some more vmware-related files to the corresponding section
hw: Add compat machines for 9.0
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Outside of system emulation, only qtest_enabled() can be used.
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <20231212113016.29808-3-philmd@linaro.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Introduce an iommufd object which allows the interaction
with the host /dev/iommu device.
The /dev/iommu can have been already pre-opened outside of qemu,
in which case the fd can be passed directly along with the
iommufd object:
This allows the iommufd object to be shared accross several
subsystems (VFIO, VDPA, ...). For example, libvirt would open
the /dev/iommu once.
If no fd is passed along with the iommufd object, the /dev/iommu
is opened by the qemu code.
Suggested-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Yi Liu <yi.l.liu@intel.com>
Signed-off-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
Reviewed-by: Cédric Le Goater <clg@redhat.com>
Tested-by: Eric Auger <eric.auger@redhat.com>
Tested-by: Nicolin Chen <nicolinc@nvidia.com>
Signed-off-by: Cédric Le Goater <clg@redhat.com>
Some architectures (s390x) need to cleanup after a failed dump to be
able to continue to run the vm. Add a cleanup function pointer and
call it if it's set.
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-ID: <20231109120443.185979-3-frankja@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
kvm_get_radix_page_info() is only defined for ppc targets (in
target/ppc/kvm.c). The declaration is not useful in other targets,
reduce its scope.
Rename using the 'kvmppc_' prefix following other declarations
from target/ppc/kvm_ppc.h.
Suggested-by: Michael Tokarev <mjt@tls.msk.ru>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Message-Id: <20231003070427.69621-2-philmd@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Introduce cpu_exec_reset_hold() which call an accelerator
specific AccelOpsClass::cpu_reset_hold() handler.
Define a stub on TCG user emulation, because CPU reset is
irrelevant there.
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Anton Johansson <anjo@rev.ng>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230918104153.24433-3-philmd@linaro.org>
Selected bugfixes for mainline and stable, especially to the per-vCPU
local APIC vector delivery mode for event channel notifications, which
was broken in a number of ways.
The xen-block driver has been defaulting to the wrong protocol for x86
guest, and this fixes that — which is technically an incompatible change
but I'm fairly sure nobody relies on the broken behaviour (and in
production I *have* seen guests which rely on the correct behaviour,
which now matches the blkback driver in the Linux kernel).
A handful of other simple fixes for issues which came to light as new
features (qv) were being developed.
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Merge tag 'pull-xenfv-stable-20231106' of git://git.infradead.org/users/dwmw2/qemu into staging
Bugfixes for emulated Xen support
Selected bugfixes for mainline and stable, especially to the per-vCPU
local APIC vector delivery mode for event channel notifications, which
was broken in a number of ways.
The xen-block driver has been defaulting to the wrong protocol for x86
guest, and this fixes that — which is technically an incompatible change
but I'm fairly sure nobody relies on the broken behaviour (and in
production I *have* seen guests which rely on the correct behaviour,
which now matches the blkback driver in the Linux kernel).
A handful of other simple fixes for issues which came to light as new
features (qv) were being developed.
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# gpg: Signature made Mon 06 Nov 2023 18:25:02 HKT
# gpg: using RSA key BE07D9FD54809AB2C4B0FF5F63762CDA67E2F359
# gpg: issuer "dwmw2@infradead.org"
# gpg: Good signature from "David Woodhouse <dwmw2@infradead.org>" [unknown]
# gpg: aka "David Woodhouse <dwmw2@exim.org>" [unknown]
# gpg: aka "David Woodhouse <david@woodhou.se>" [unknown]
# gpg: aka "David Woodhouse <dwmw2@kernel.org>" [unknown]
# gpg: WARNING: The key's User ID is not certified with a trusted signature!
# gpg: There is no indication that the signature belongs to the owner.
# Primary key fingerprint: BE07 D9FD 5480 9AB2 C4B0 FF5F 6376 2CDA 67E2 F359
* tag 'pull-xenfv-stable-20231106' of git://git.infradead.org/users/dwmw2/qemu:
hw/xen: use correct default protocol for xen-block on x86
hw/xen: take iothread mutex in xen_evtchn_reset_op()
hw/xen: fix XenStore watch delivery to guest
hw/xen: don't clear map_track[] in xen_gnttab_reset()
hw/xen: select kernel mode for per-vCPU event channel upcall vector
i386/xen: fix per-vCPU upcall vector for Xen emulation
i386/xen: Don't advertise XENFEAT_supervisor_mode_kernel
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
A guest which has configured the per-vCPU upcall vector may set the
HVM_PARAM_CALLBACK_IRQ param to fairly much anything other than zero.
For example, Linux v6.0+ after commit b1c3497e604 ("x86/xen: Add support
for HVMOP_set_evtchn_upcall_vector") will just do this after setting the
vector:
/* Trick toolstack to think we are enlightened. */
if (!cpu)
rc = xen_set_callback_via(1);
That's explicitly setting the delivery to GSI#1, but it's supposed to be
overridden by the per-vCPU vector setting. This mostly works in Qemu
*except* for the logic to enable the in-kernel handling of event channels,
which falsely determines that the kernel cannot accelerate GSI delivery
in this case.
Add a kvm_xen_has_vcpu_callback_vector() to report whether vCPU#0 has
the vector set, and use that in xen_evtchn_set_callback_param() to
enable the kernel acceleration features even when the param *appears*
to be set to target a GSI.
Preserve the Xen behaviour that when HVM_PARAM_CALLBACK_IRQ is set to
*zero* the event channel delivery is disabled completely. (Which is
what that bizarre guest behaviour is working round in the first place.)
Cc: qemu-stable@nongnu.org
Fixes: 91cce75617 ("hw/xen: Add xen_evtchn device for event channel emulation")
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Reviewed-by: Paul Durrant <paul@xen.org>
The flattened format (currently output by QEMU) is used by makedumpfile
only when it is outputting a vmcore to a file which is not seekable. The
flattened format functions essentially as a set of instructions of the
form "seek to the given offset, then write the given bytes out".
The flattened format can be reconstructed using makedumpfile -R, or
makedumpfile-R.pl, but it is a slow process because it requires copying
the entire vmcore. The flattened format can also be directly read by
crash, but still, it requires a lengthy reassembly phase.
To sum up, the flattened format is not an ideal one: it should only be
used on files which are actually not seekable. This is the exact
strategy which makedumpfile uses, as seen in the implementation of
"write_buffer()" in makedumpfile [1]. However, QEMU has always used the
flattened format. For compatibility it is best not to change the default
output format without warning. So, add a flag to DumpState which changes
the output to use the normal (i.e. raw) format. This flag will be added
to the QMP and HMP commands in the next change.
[1]: f23bb94356/makedumpfile.c (L5008-L5040)
Signed-off-by: Stephen Brennan <stephen.s.brennan@oracle.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
[ Marc-André: replace loff_t with off_t ]
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20230918233233.1431858-3-stephen.s.brennan@oracle.com>
For the next patch, we need a reference to DumpState when writing data.
Signed-off-by: Stephen Brennan <stephen.s.brennan@oracle.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20230918233233.1431858-2-stephen.s.brennan@oracle.com>
The networking subsystem may wish to use defer_call(), so move the code
to util/ where it can be reused.
As a reminder of what defer_call() does:
This API defers a function call within a defer_call_begin()/defer_call_end()
section, allowing multiple calls to batch up. This is a performance
optimization that is used in the block layer to submit several I/O requests
at once instead of individually:
defer_call_begin(); <-- start of section
...
defer_call(my_func, my_obj); <-- deferred my_func(my_obj) call
defer_call(my_func, my_obj); <-- another
defer_call(my_func, my_obj); <-- another
...
defer_call_end(); <-- end of section, my_func(my_obj) is called once
Suggested-by: Ilya Maximets <i.maximets@ovn.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-ID: <20230913200045.1024233-3-stefanha@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Prepare to move the blk_io_plug_call() API out of the block layer so
that other subsystems call use this deferred call mechanism. Rename it
to defer_call() but leave the code in block/plug.c.
The next commit will move the code out of the block layer.
Suggested-by: Ilya Maximets <i.maximets@ovn.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Paul Durrant <paul@xen.org>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-ID: <20230913200045.1024233-2-stefanha@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
NR_IOBUS_DEVS was increased to 200 in Linux 2.6.34. By Linux 3.5 it had
increased to 1000 and later ioeventfds were changed to not count against
the limit. But the earlier limit of 200 would already be enough for
kvm_check_many_ioeventfds() to be true, so remove the check.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This is a remnant of pre-VFIO device assignment; it is not defined
anymore by Linux and not used by QEMU.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
KVM_IRQFD was introduced in Linux 2.6.32, and since then it has always been
available on architectures that support an in-kernel interrupt controller.
We can require it unconditionally.
Reviewed-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
KVM_IRQFD was introduced in Linux 2.6.32, and since then it has always been
available on architectures that support an in-kernel interrupt controller.
We can require it unconditionally.
Reviewed-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This was introduced in KVM in Linux 3.5, we can require it unconditionally
in kvm_irqchip_send_msi(). However, not all architectures have to implement
it so check it only in x86, the only architecture that ever had MSI injection
but not KVM_CAP_SIGNAL_MSI.
ARM uses it to detect the presence of the ITS emulation in the kernel,
introduced in Linux 4.8. Assume that it's there and possibly fail when
realizing the arm-its-kvm device.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
- Clean up coroutine versions of bdrv_{is_allocated,block_status}*
- Graph locking part 5 (protect children/parent links)
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Merge tag 'for-upstream' of https://repo.or.cz/qemu/kevin into staging
Block layer patches
- Clean up coroutine versions of bdrv_{is_allocated,block_status}*
- Graph locking part 5 (protect children/parent links)
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# gpg: Signature made Thu 12 Oct 2023 12:20:15 EDT
# gpg: using RSA key DC3DEB159A9AF95D3D7456FE7F09B272C88F2FD6
# gpg: issuer "kwolf@redhat.com"
# gpg: Good signature from "Kevin Wolf <kwolf@redhat.com>" [full]
# Primary key fingerprint: DC3D EB15 9A9A F95D 3D74 56FE 7F09 B272 C88F 2FD6
* tag 'for-upstream' of https://repo.or.cz/qemu/kevin: (26 commits)
block: Add assertion for bdrv_graph_wrlock()
block: Protect bs->children with graph_lock
block: Protect bs->parents with graph_lock
block: Mark bdrv_get_specific_info() and callers GRAPH_RDLOCK
block: Mark bdrv_apply_auto_read_only() and callers GRAPH_RDLOCK
block: Mark bdrv_op_is_blocked() and callers GRAPH_RDLOCK
qcow2: Mark check_constraints_on_bitmap() GRAPH_RDLOCK
qcow2: Mark qcow2_inactivate() and callers GRAPH_RDLOCK
qcow2: Mark qcow2_signal_corruption() and callers GRAPH_RDLOCK
block: Mark bdrv_amend_options() and callers GRAPH_RDLOCK
block: Mark bdrv_get_parent_name() and callers GRAPH_RDLOCK
block: Mark bdrv_primary_child() and callers GRAPH_RDLOCK
block: Mark bdrv_refresh_filename() and callers GRAPH_RDLOCK
block: Mark bdrv_get_xdbg_block_graph() and callers GRAPH_RDLOCK
block: Take graph rdlock in parts of reopen
block: Mark bdrv_snapshot_fallback() and callers GRAPH_RDLOCK
block: Mark bdrv_parent_cb_resize() and callers GRAPH_RDLOCK
block: Mark drain related functions GRAPH_RDLOCK
block: Mark bdrv_first_blk() and bdrv_is_root_node() GRAPH_RDLOCK
block: Take graph rdlock in bdrv_inactivate_all()
...
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
"Host Memory Backends" and "Memory devices" queue ("mem"):
- Support memory devices with multiple memslots
- Support memory devices that dynamically consume memslots
- Support memory devices that can automatically decide on the number of
memslots to use
- virtio-mem support for exposing memory dynamically via multiple
memslots
- Some required cleanups/refactorings
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Merge tag 'mem-2023-10-12' of https://github.com/davidhildenbrand/qemu into staging
Hi,
"Host Memory Backends" and "Memory devices" queue ("mem"):
- Support memory devices with multiple memslots
- Support memory devices that dynamically consume memslots
- Support memory devices that can automatically decide on the number of
memslots to use
- virtio-mem support for exposing memory dynamically via multiple
memslots
- Some required cleanups/refactorings
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# -----END PGP SIGNATURE-----
# gpg: Signature made Thu 12 Oct 2023 09:49:39 EDT
# gpg: using RSA key 1BD9CAAD735C4C3A460DFCCA4DDE10F700FF835A
# gpg: issuer "david@redhat.com"
# gpg: Good signature from "David Hildenbrand <david@redhat.com>" [unknown]
# gpg: aka "David Hildenbrand <davidhildenbrand@gmail.com>" [full]
# gpg: aka "David Hildenbrand <hildenbr@in.tum.de>" [unknown]
# gpg: WARNING: The key's User ID is not certified with a trusted signature!
# gpg: There is no indication that the signature belongs to the owner.
# Primary key fingerprint: 1BD9 CAAD 735C 4C3A 460D FCCA 4DDE 10F7 00FF 835A
* tag 'mem-2023-10-12' of https://github.com/davidhildenbrand/qemu:
virtio-mem: Mark memslot alias memory regions unmergeable
memory,vhost: Allow for marking memory device memory regions unmergeable
virtio-mem: Expose device memory dynamically via multiple memslots if enabled
virtio-mem: Update state to match bitmap as soon as it's been migrated
virtio-mem: Pass non-const VirtIOMEM via virtio_mem_range_cb
memory: Clarify mapping requirements for RamDiscardManager
memory-device,vhost: Support automatic decision on the number of memslots
vhost: Add vhost_get_max_memslots()
kvm: Add stub for kvm_get_max_memslots()
memory-device,vhost: Support memory devices that dynamically consume memslots
memory-device: Track required and actually used memslots in DeviceMemoryState
stubs: Rename qmp_memory_device.c to memory_device.c
memory-device: Support memory devices with multiple memslots
vhost: Return number of free memslots
kvm: Return number of free memslots
softmmu/physmem: Fixup qemu_ram_block_from_host() documentation
vhost: Remove vhost_backend_can_merge() callback
vhost: Rework memslot filtering and fix "used_memslot" tracking
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This adds GRAPH_RDLOCK annotations to declare that callers of
bdrv_first_blk() and bdrv_is_root_node() need to hold a reader lock
for the graph. These functions are the only functions in block-backend.c
that access the parent list of a node.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-ID: <20230929145157.45443-5-kwolf@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
* Add support for the max CPU
* Detect user choice in TCG
* Clear CSR values at reset and sync MPSTATE with host
* Fix the typo of inverted order of pmpaddr13 and pmpaddr14
* Split TCG/KVM accelerators from cpu.c
* Add extension properties for all cpus
* Replace GDB exit calls with proper shutdown
* Support KVM_GET_REG_LIST
* Remove RVG warning
* Use env_archcpu for better performance
* Deprecate capital 'Z' CPU properties
* Fix vfwmaccbf16.vf
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Merge tag 'pull-riscv-to-apply-20231012-1' of https://github.com/alistair23/qemu into staging
Second RISC-V PR for 8.2
* Add support for the max CPU
* Detect user choice in TCG
* Clear CSR values at reset and sync MPSTATE with host
* Fix the typo of inverted order of pmpaddr13 and pmpaddr14
* Split TCG/KVM accelerators from cpu.c
* Add extension properties for all cpus
* Replace GDB exit calls with proper shutdown
* Support KVM_GET_REG_LIST
* Remove RVG warning
* Use env_archcpu for better performance
* Deprecate capital 'Z' CPU properties
* Fix vfwmaccbf16.vf
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# gpg: Signature made Thu 12 Oct 2023 00:09:36 EDT
# gpg: using RSA key 6AE902B6A7CA877D6D659296AF7C95130C538013
# gpg: Good signature from "Alistair Francis <alistair@alistair23.me>" [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: 6AE9 02B6 A7CA 877D 6D65 9296 AF7C 9513 0C53 8013
* tag 'pull-riscv-to-apply-20231012-1' of https://github.com/alistair23/qemu: (54 commits)
target/riscv: Fix vfwmaccbf16.vf
target/riscv: deprecate capital 'Z' CPU properties
target/riscv: Use env_archcpu for better performance
target/riscv/tcg: remove RVG warning
target/riscv/kvm: support KVM_GET_REG_LIST
target/riscv/kvm: improve 'init_multiext_cfg' error msg
gdbstub: replace exit calls with proper shutdown for softmmu
hw/char: riscv_htif: replace exit calls with proper shutdown
hw/misc/sifive_test.c: replace exit calls with proper shutdown
softmmu: pass the main loop status to gdb "Wxx" packet
softmmu: add means to pass an exit code when requesting a shutdown
target/riscv/tcg-cpu.c: add extension properties for all cpus
target/riscv: add riscv_cpu_get_name()
target/riscv/cpu: move priv spec functions to tcg-cpu.c
target/riscv/cpu.c: export isa_edata_arr[]
target/riscv/tcg: move riscv_cpu_add_misa_properties() to tcg-cpu.c
target/riscv/cpu.c: make misa_ext_cfgs[] 'const'
target/riscv/tcg: introduce tcg_cpu_instance_init()
target/riscv/cpu.c: export set_misa()
target/riscv/kvm: do not use riscv_cpu_add_misa_properties()
...
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
We'll need the stub soon from memory device context.
While at it, use "unsigned int" as return value and place the
declaration next to kvm_get_free_memslots().
Message-ID: <20230926185738.277351-11-david@redhat.com>
Reviewed-by: Maciej S. Szmigiero <maciej.szmigiero@oracle.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
Let's return the number of free slots instead of only checking if there
is a free slot. While at it, check all address spaces, which will also
consider SMM under x86 correctly.
This is a preparation for memory devices that consume multiple memslots.
Message-ID: <20230926185738.277351-5-david@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Maciej S. Szmigiero <maciej.szmigiero@oracle.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
gdb_exit function aims to close gdb sessions and sends the exit code of
the current execution. It's being called by qemu_cleanup once the main
loop is over.
Until now, the exit code sent was always 0. Now that hardware can
shutdown this main loop with custom exit codes, these codes must be
transfered to gdb as well.
Signed-off-by: Clément Chigot <chigot@adacore.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-ID: <20231003071427.188697-3-chigot@adacore.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
As of now, the exit code was either EXIT_FAILURE when a panic shutdown
was requested or EXIT_SUCCESS otherwise.
However, some hardware could want to pass more complex exit codes. Thus,
introduce a new shutdown request function allowing that.
Signed-off-by: Clément Chigot <chigot@adacore.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-ID: <20231003071427.188697-2-chigot@adacore.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Commit a5e0b33119 ("vl.c: Replace smp global variables
with smp machine properties") removed the last uses of
the smp_cores / smp_threads variables but forgot to
remove their declarations. Do it now.
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
