Commit Graph

111729 Commits

Author SHA1 Message Date
Zhao Liu
2ed22b2c6a hw/core: Cleanup unused included headers in cpu-common.c
Remove unused headers in cpu-common.c:
* qemu/notify.h
* exec/cpu-common.h
* qemu/error-report.h
* qemu/qemu-print.h

Tested by "./configure" and then "make".

Signed-off-by: Zhao Liu <zhao1.liu@intel.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <20240311075621.3224684-2-zhao1.liu@linux.intel.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
2024-03-11 22:10:18 +01:00
Mark Cave-Ayland
c1c73b31d9 sun4u: remap ebus BAR0 to use unassigned_io_ops instead of alias to PCI IO space
During kernel startup OpenBSD accesses addresses mapped by BAR0 of the ebus device
but at offsets where no IO devices exist. Before commit 4aa07e8649 ("hw/sparc64/ebus:
Access memory regions via pci_address_space_io()") BAR0 was mapped to legacy IO
space which allows accesses to unmapped devices to succeed, but afterwards these
accesses to unmapped PCI IO space cause a memory fault which prevents OpenBSD from
booting.

Since no devices are mapped at the addresses accessed by OpenBSD, change ebus BAR0
from a PCI IO space alias to an IO memory region using unassigned_io_ops which allows
these accesses to succeed and so allows OpenBSD to boot once again.

Fixes: 4aa07e8649 ("hw/sparc64/ebus: Access memory regions via pci_address_space_io()")
Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <20240311064345.2531197-1-mark.cave-ayland@ilande.co.uk>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
2024-03-11 22:10:18 +01:00
Zhao Liu
b691b250d3 hw/misc/ivshmem: Fix missing ERRP_GUARD() for error_prepend()
As the comment in qapi/error, passing @errp to error_prepend() requires
ERRP_GUARD():

* = Why, when and how to use ERRP_GUARD() =
*
* Without ERRP_GUARD(), use of the @errp parameter is restricted:
...
* - It should not be passed to error_prepend(), error_vprepend() or
*   error_append_hint(), because that doesn't work with &error_fatal.
* ERRP_GUARD() lifts these restrictions.
*
* To use ERRP_GUARD(), add it right at the beginning of the function.
* @errp can then be used without worrying about the argument being
* NULL or &error_fatal.

ERRP_GUARD() could avoid the case when @errp is &error_fatal, the user
can't see this additional information, because exit() happens in
error_setg earlier than information is added [1].

The ivshmem_common_realize() passes @errp to error_prepend(), and as a
DeviceClass.realize method, there are too many possible callers to check
the impact of this defect; it may or may not be harmless. Thus it is
necessary to protect @errp with ERRP_GUARD().

To avoid the issue like [1] said, add missing ERRP_GUARD() at the
beginning of this function.

[1]: Issue description in the commit message of commit ae7c80a7bd
     ("error: New macro ERRP_GUARD()").

Cc: Juan Quintela <quintela@trasno.org>
Cc: Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
Cc: Michael Galaxy <mgalaxy@akamai.com>
Cc: Steve Sistare <steven.sistare@oracle.com>
Signed-off-by: Zhao Liu <zhao1.liu@intel.com>
Message-ID: <20240311033822.3142585-17-zhao1.liu@linux.intel.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
2024-03-11 22:10:18 +01:00
Zhao Liu
688f2349a7 hw/core/qdev-properties-system: Fix missing ERRP_GUARD() for error_prepend()
As the comment in qapi/error, passing @errp to error_prepend() requires
ERRP_GUARD():

* = Why, when and how to use ERRP_GUARD() =
*
* Without ERRP_GUARD(), use of the @errp parameter is restricted:
...
* - It should not be passed to error_prepend(), error_vprepend() or
*   error_append_hint(), because that doesn't work with &error_fatal.
* ERRP_GUARD() lifts these restrictions.
*
* To use ERRP_GUARD(), add it right at the beginning of the function.
* @errp can then be used without worrying about the argument being
* NULL or &error_fatal.

ERRP_GUARD() could avoid the case when @errp is &error_fatal, the user
can't see this additional information, because exit() happens in
error_setg earlier than information is added [1].

The set_chr() passes @errp to error_prepend() without ERRP_GUARD().

As a PropertyInfo.set method, there are too many possible callers to
check the impact of this defect; it may or may not be harmless. Thus it
is necessary to protect @errp with ERRP_GUARD().

To avoid the issue like [1] said, add missing ERRP_GUARD() at the
beginning of this function.

[1]: Issue description in the commit message of commit ae7c80a7bd
     ("error: New macro ERRP_GUARD()").

Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: "Daniel P. Berrangé" <berrange@redhat.com
Cc: Eduardo Habkost <eduardo@habkost.net>
Signed-off-by: Zhao Liu <zhao1.liu@intel.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Message-ID: <20240311033822.3142585-16-zhao1.liu@linux.intel.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
2024-03-11 22:10:18 +01:00
Zhao Liu
bfd65b4ba5 hw/core/loader-fit: Fix missing ERRP_GUARD() for error_prepend()
As the comment in qapi/error, passing @errp to error_prepend() requires
ERRP_GUARD():

* = Why, when and how to use ERRP_GUARD() =
*
* Without ERRP_GUARD(), use of the @errp parameter is restricted:
...
* - It should not be passed to error_prepend(), error_vprepend() or
*   error_append_hint(), because that doesn't work with &error_fatal.
* ERRP_GUARD() lifts these restrictions.
*
* To use ERRP_GUARD(), add it right at the beginning of the function.
* @errp can then be used without worrying about the argument being
* NULL or &error_fatal.

ERRP_GUARD() could avoid the case when @errp is &error_fatal, the user
can't see this additional information, because exit() happens in
error_setg earlier than information is added [1].

In hw/core/loader-fit.c, there are 2 functions passing @errp to
error_prepend() without ERRP_GUARD():
 - fit_load_kernel()
 - fit_load_fdt()

Their @errp parameters are both the pointers of the local @err virable
in load_fit().

Though they don't cause the issue like [1] said, to follow the
requirement of @errp, add missing ERRP_GUARD() at their beginning.

[1]: Issue description in the commit message of commit ae7c80a7bd
     ("error: New macro ERRP_GUARD()").

Cc: Paul Burton <paulburton@kernel.org>
Cc: Aleksandar Rikalo <aleksandar.rikalo@syrmia.com>
Signed-off-by: Zhao Liu <zhao1.liu@intel.com>
Message-ID: <20240311033822.3142585-15-zhao1.liu@linux.intel.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
2024-03-11 22:10:18 +01:00
BALATON Zoltan
d36b2f4e78 hw/ppc/sam460ex: Support short options for adding drives
Having to use -drive if=none,... and -device ide-[cd,hd] is
inconvenient. Add support for shorter convenience options such as
-cdrom and -drive media=disk. Also adjust two nearby comments for code
style.

Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
Message-ID: <20240305225721.E9A404E6005@zero.eik.bme.hu>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
2024-03-11 22:09:46 +01:00
Vladimir Sementsov-Ogievskiy
86f0aa1d43 hw/pci: add some convenient trace-events for pcie and shpc hotplug
Add trace-events that may help to debug problems with hotplugging.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <20240301154146.761531-2-vsementsov@yandex-team.ru>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
2024-03-11 22:09:42 +01:00
BALATON Zoltan
2f73edac56 hw/ide/ahci: Rename ahci_internal.h to ahci-internal.h
Other headers now use dash instead of underscore. Rename
ahci_internal.h accordingly for consistency.

Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <20240227131310.C24EB4E6005@zero.eik.bme.hu>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
2024-03-11 22:09:42 +01:00
Hao Xiang
1815338df0 migration/multifd: Add new migration test cases for legacy zero page checking.
Now that zero page checking is done on the multifd sender threads by
default, we still provide an option for backward compatibility. This
change adds a qtest migration test case to set the zero-page-detection
option to "legacy" and run multifd migration with zero page checking on the
migration main thread.

Signed-off-by: Hao Xiang <hao.xiang@bytedance.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Link: https://lore.kernel.org/r/20240311180015.3359271-8-hao.xiang@linux.dev
Signed-off-by: Peter Xu <peterx@redhat.com>
2024-03-11 16:57:09 -04:00
Hao Xiang
70c25c92e6 migration/multifd: Enable multifd zero page checking by default.
1. Set default "zero-page-detection" option to "multifd". Now
zero page checking can be done in the multifd threads and this
becomes the default configuration.
2. Handle migration QEMU9.0 -> QEMU8.2 compatibility. We provide
backward compatibility where zero page checking is done from the
migration main thread.

Signed-off-by: Hao Xiang <hao.xiang@bytedance.com>
Reviewed-by: Fabiano Rosas <farosas@suse.de>
Reviewed-by: Peter Xu <peterx@redhat.com>
Link: https://lore.kernel.org/r/20240311180015.3359271-7-hao.xiang@linux.dev
Signed-off-by: Peter Xu <peterx@redhat.com>
2024-03-11 16:57:09 -04:00
Hao Xiang
9ae90f73e6 migration/multifd: Implement ram_save_target_page_multifd to handle multifd version of MigrationOps::ram_save_target_page.
1. Add a dedicated handler for MigrationOps::ram_save_target_page in
multifd live migration.
2. Refactor ram_save_target_page_legacy so that the legacy and multifd
handlers don't have internal functions calling into each other.

Signed-off-by: Hao Xiang <hao.xiang@bytedance.com>
Reviewed-by: Fabiano Rosas <farosas@suse.de>
Message-Id: <20240226195654.934709-4-hao.xiang@bytedance.com>
Link: https://lore.kernel.org/r/20240311180015.3359271-6-hao.xiang@linux.dev
Signed-off-by: Peter Xu <peterx@redhat.com>
2024-03-11 16:57:09 -04:00
Hao Xiang
303e6f54f9 migration/multifd: Implement zero page transmission on the multifd thread.
1. Add zero_pages field in MultiFDPacket_t.
2. Implements the zero page detection and handling on the multifd
threads for non-compression, zlib and zstd compression backends.
3. Added a new value 'multifd' in ZeroPageDetection enumeration.
4. Adds zero page counters and updates multifd send/receive tracing
format to track the newly added counters.

Signed-off-by: Hao Xiang <hao.xiang@bytedance.com>
Acked-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Fabiano Rosas <farosas@suse.de>
Link: https://lore.kernel.org/r/20240311180015.3359271-5-hao.xiang@linux.dev
Signed-off-by: Peter Xu <peterx@redhat.com>
2024-03-11 16:57:09 -04:00
Hao Xiang
5fdbb1dfcc migration/multifd: Add new migration option zero-page-detection.
This new parameter controls where the zero page checking is running.
1. If this parameter is set to 'legacy', zero page checking is
done in the migration main thread.
2. If this parameter is set to 'none', zero page checking is disabled.

Signed-off-by: Hao Xiang <hao.xiang@bytedance.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Acked-by: Markus Armbruster <armbru@redhat.com>
Link: https://lore.kernel.org/r/20240311180015.3359271-4-hao.xiang@linux.dev
Signed-off-by: Peter Xu <peterx@redhat.com>
2024-03-11 16:57:05 -04:00
Fabiano Rosas
c3cdf3fb18 migration/multifd: Allow clearing of the file_bmap from multifd
We currently only need to clear the mapped-ram file bitmap from the
migration thread during save_zero_page.

We're about to add support for zero page detection on the multifd
thread, so allow ramblock_set_file_bmap_atomic() to also clear the
bits.

Signed-off-by: Fabiano Rosas <farosas@suse.de>
Link: https://lore.kernel.org/r/20240311180015.3359271-3-hao.xiang@linux.dev
Signed-off-by: Peter Xu <peterx@redhat.com>
2024-03-11 16:56:52 -04:00
Fabiano Rosas
44fe138edc migration/multifd: Allow zero pages in file migration
Currently, it's an error to have no data pages in the multifd file
migration because zero page detection is done in the migration thread
and zero pages don't reach multifd. This is enforced with the
pages->num assert.

We're about to add zero page detection on the multifd thread. Fix the
file_write_ramblock_iov() to stop considering p->iovs_num=0 an error.

Signed-off-by: Fabiano Rosas <farosas@suse.de>
Link: https://lore.kernel.org/r/20240311180015.3359271-2-hao.xiang@linux.dev
Signed-off-by: Peter Xu <peterx@redhat.com>
2024-03-11 16:34:51 -04:00
Steve Sistare
c9539d9b14 migration: purge MigrationState from public interface
Move remaining MigrationState references from the public file
misc.h to the private file migration.h.

Signed-off-by: Steve Sistare <steven.sistare@oracle.com>
Link: https://lore.kernel.org/r/1710179338-294359-12-git-send-email-steven.sistare@oracle.com
Signed-off-by: Peter Xu <peterx@redhat.com>
2024-03-11 16:28:59 -04:00
Steve Sistare
a3ed489336 migration: delete unused accessors
Signed-off-by: Steve Sistare <steven.sistare@oracle.com>
Link: https://lore.kernel.org/r/1710179338-294359-11-git-send-email-steven.sistare@oracle.com
Signed-off-by: Peter Xu <peterx@redhat.com>
2024-03-11 16:28:59 -04:00
Steve Sistare
7395127f23 migration: privatize colo interfaces
Remove private migration interfaces from net/colo-compare.c and push them
to migration/colo.c.

Signed-off-by: Steve Sistare <steven.sistare@oracle.com>
Link: https://lore.kernel.org/r/1710179338-294359-10-git-send-email-steven.sistare@oracle.com
Signed-off-by: Peter Xu <peterx@redhat.com>
2024-03-11 16:28:59 -04:00
Steve Sistare
20c64c8a51 migration: migration_file_set_error
Define and export migration_file_set_error to eliminate a dependency
on MigrationState.

Signed-off-by: Steve Sistare <steven.sistare@oracle.com>
Link: https://lore.kernel.org/r/1710179338-294359-9-git-send-email-steven.sistare@oracle.com
Signed-off-by: Peter Xu <peterx@redhat.com>
2024-03-11 16:28:59 -04:00
Steve Sistare
9bb630c6ee migration: migration_is_device
Define and export migration_is_device to eliminate a dependency
on MigrationState.

Signed-off-by: Steve Sistare <steven.sistare@oracle.com>
Link: https://lore.kernel.org/r/1710179338-294359-8-git-send-email-steven.sistare@oracle.com
Signed-off-by: Peter Xu <peterx@redhat.com>
2024-03-11 16:28:59 -04:00
Steve Sistare
6e78563976 migration: migration_thread_is_self
Define and export migration_thread_is_self to eliminate a dependency
on MigrationState.

Signed-off-by: Steve Sistare <steven.sistare@oracle.com>
Link: https://lore.kernel.org/r/1710179338-294359-7-git-send-email-steven.sistare@oracle.com
Signed-off-by: Peter Xu <peterx@redhat.com>
2024-03-11 16:28:59 -04:00
Steve Sistare
714f33123b migration: export vcpu_dirty_limit_period
Define and export vcpu_dirty_limit_period to eliminate a dependency
on MigrationState.

Signed-off-by: Steve Sistare <steven.sistare@oracle.com>
Link: https://lore.kernel.org/r/1710179338-294359-6-git-send-email-steven.sistare@oracle.com
Signed-off-by: Peter Xu <peterx@redhat.com>
2024-03-11 16:28:59 -04:00
Steve Sistare
aeaafb1e59 migration: export migration_is_running
Delete the MigrationState parameter from migration_is_running and move
it to the public API in misc.h.

Signed-off-by: Steve Sistare <steven.sistare@oracle.com>
Link: https://lore.kernel.org/r/1710179338-294359-5-git-send-email-steven.sistare@oracle.com
Signed-off-by: Peter Xu <peterx@redhat.com>
2024-03-11 16:28:59 -04:00
Steve Sistare
3a6813b68c migration: export migration_is_active
Delete the MigrationState parameter from migration_is_active so it
can be exported and used without including migration.h.

Signed-off-by: Steve Sistare <steven.sistare@oracle.com>
Link: https://lore.kernel.org/r/1710179338-294359-4-git-send-email-steven.sistare@oracle.com
Signed-off-by: Peter Xu <peterx@redhat.com>
2024-03-11 16:28:59 -04:00
Steve Sistare
7dcb3c87d8 migration: export migration_is_setup_or_active
Delete the MigrationState parameter from migration_is_setup_or_active
and move it to the public API in misc.h.

Signed-off-by: Steve Sistare <steven.sistare@oracle.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Link: https://lore.kernel.org/r/1710179338-294359-3-git-send-email-steven.sistare@oracle.com
Signed-off-by: Peter Xu <peterx@redhat.com>
2024-03-11 16:28:59 -04:00
Steve Sistare
f853fa0714 migration: remove migration.h references
Remove migration.h from files that no longer need it due to
previous commits.

Signed-off-by: Steve Sistare <steven.sistare@oracle.com>
Link: https://lore.kernel.org/r/1710179338-294359-2-git-send-email-steven.sistare@oracle.com
Signed-off-by: Peter Xu <peterx@redhat.com>
2024-03-11 16:28:59 -04:00
Steve Sistare
f3bff6c443 migration: export fewer options
A small number of migration options are accessed by migration clients,
but to see them clients must include all of options.h, which is mostly
for migration core code.  migrate_mode() in particular will be needed by
multiple clients.

Refactor the option declarations so clients can see the necessary few via
misc.h, which already exports a portion of the client API.

Signed-off-by: Steve Sistare <steven.sistare@oracle.com>
Link: https://lore.kernel.org/r/1710179319-294320-1-git-send-email-steven.sistare@oracle.com
Signed-off-by: Peter Xu <peterx@redhat.com>
2024-03-11 16:28:59 -04:00
Peter Maydell
05ec974671 Pull request for m68k 20240311
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Merge tag 'm68k-for-9.0-pull-request' of https://github.com/vivier/qemu-m68k into staging

Pull request for m68k 20240311

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# gpg: Good signature from "Laurent Vivier <lvivier@redhat.com>" [full]
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* tag 'm68k-for-9.0-pull-request' of https://github.com/vivier/qemu-m68k:
  virt: set the CPU type in BOOTINFO

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2024-03-11 18:42:53 +00:00
Peter Maydell
e6964ee196 qga-pull-2024-03-11-2
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Merge tag 'qga-pull-2024-03-11-2' of https://github.com/kostyanf14/qemu into staging

qga-pull-2024-03-11-2

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* tag 'qga-pull-2024-03-11-2' of https://github.com/kostyanf14/qemu:
  qga-win: Add support of Windows Server 2025 in get-osinfo command
  qga/commands-win32: Do not set matrix_lookup_t/win_10_0_t arrays size
  qga/commands-win32: Declare const qualifier before type

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2024-03-11 18:42:40 +00:00
Peter Maydell
67ff703c97 vfio queue:
* Allow cpr-reboot for vfio
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Merge tag 'pull-vfio-20240310' of https://github.com/legoater/qemu into staging

vfio queue:

* Allow cpr-reboot for vfio

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* tag 'pull-vfio-20240310' of https://github.com/legoater/qemu:
  vfio: allow cpr-reboot migration if suspended
  vfio: register container for cpr

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2024-03-11 18:42:23 +00:00
Anthony PERARD
a1bb5dd169 migration: Fix format in error message
In file_write_ramblock_iov(), "offset" is "uintptr_t" and not
"ram_addr_t". While usually they are both equivalent, this is not the
case with CONFIG_XEN_BACKEND.

Use the right format. This will fix build on 32-bit.

Fixes: f427d90b98 ("migration/multifd: Support outgoing mapped-ram stream format")
Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Link: https://lore.kernel.org/r/20240311123439.16844-1-anthony.perard@citrix.com
Signed-off-by: Peter Xu <peterx@redhat.com>
2024-03-11 14:41:41 -04:00
Jonathan Cameron
47293c922c physmem: Fix wrong address in large address_space_read/write_cached_slow()
If the access is bigger than the MemoryRegion supports,
flatview_read/write_continue() will attempt to update the Memory Region.
but the address passed to flatview_translate() is relative to the cache, not
to the FlatView.

On arm/virt with interleaved CXL memory emulation and virtio-blk-pci this
lead to the first part of descriptor being read from the CXL memory and the
second part from PA 0x8 which happens to be a blank region
of a flash chip and all ffs on this particular configuration.
Note this test requires the out of tree ARM support for CXL, but
the problem is more general.

Avoid this by adding new address_space_read_continue_cached()
and address_space_write_continue_cached() which share all the logic
with the flatview versions except for the MemoryRegion lookup which
is unnecessary as the MemoryRegionCache only covers one MemoryRegion.

Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Link: https://lore.kernel.org/r/20240307153710.30907-5-Jonathan.Cameron@huawei.com
Signed-off-by: Peter Xu <peterx@redhat.com>
2024-03-11 14:41:41 -04:00
Jonathan Cameron
e7927d33cf physmem: Factor out body of flatview_read/write_continue() loop
This code will be reused for the address_space_cached accessors
shortly.

Also reduce scope of result variable now we aren't directly
calling this in the loop.

Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Link: https://lore.kernel.org/r/20240307153710.30907-4-Jonathan.Cameron@huawei.com
Signed-off-by: Peter Xu <peterx@redhat.com>
2024-03-11 14:41:40 -04:00
Jonathan Cameron
bcfd8ba4f5 physmem: Reduce local variable scope in flatview_read/write_continue()
Precursor to factoring out the inner loops for reuse.

Reviewed-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Link: https://lore.kernel.org/r/20240307153710.30907-3-Jonathan.Cameron@huawei.com
Signed-off-by: Peter Xu <peterx@redhat.com>
2024-03-11 14:41:40 -04:00
Jonathan Cameron
4c7c856319 physmem: Rename addr1 to more informative mr_addr in flatview_read/write() and similar
The calls to flatview_read/write[_continue]() have parameters addr and
addr1 but the names give no indication of what they are addresses of.
Rename addr1 to mr_addr to reflect that it is the translated address
offset within the MemoryRegion returned by flatview_translate().
Similarly rename the parameter in address_space_read/write_cached_slow()

Suggested-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Link: https://lore.kernel.org/r/20240307153710.30907-2-Jonathan.Cameron@huawei.com
Signed-off-by: Peter Xu <peterx@redhat.com>
2024-03-11 14:41:40 -04:00
Yu Zhang
69f7b00d05 migration/rdma: Fix a memory issue for migration
In commit 3fa9642ff7 change was made to convert the RDMA backend to
accept MigrateAddress struct. However, the assignment of "host" leads
to data corruption on the target host and the failure of migration.

    isock->host = rdma->host;

By allocating the memory explicitly for it with g_strdup_printf(), the
issue is fixed and the migration doesn't fail any more.

Fixes: 3fa9642ff7 ("migration: convert rdma backend to accept MigrateAddress")
Cc: qemu-stable <qemu-stable@nongnu.org>
Cc: Li Zhijian <lizhijian@fujitsu.com>
Link: https://lore.kernel.org/r/CAHEcVy4L_D6tuhJ8h=xLR4WaPaprJE3nnxZAEyUnoTrxQ6CF5w@mail.gmail.com
Signed-off-by: Yu Zhang <yu.zhang@ionos.com>
[peterx: use g_strdup() instead of g_strdup_printf(), per Zhijian]
Signed-off-by: Peter Xu <peterx@redhat.com>
2024-03-11 14:41:40 -04:00
Fabiano Rosas
61dec06082 migration/multifd: Don't fsync when closing QIOChannelFile
Commit bc38feddeb ("io: fsync before closing a file channel") added a
fsync/fdatasync at the closing point of the QIOChannelFile to ensure
integrity of the migration stream in case of QEMU crash.

The decision to do the sync at qio_channel_close() was not the best
since that function runs in the main thread and the fsync can cause
QEMU to hang for several minutes, depending on the migration size and
disk speed.

To fix the hang, remove the fsync from qio_channel_file_close().

At this moment, the migration code is the only user of the fsync and
we're taking the tradeoff of not having a sync at all, leaving the
responsibility to the upper layers.

Fixes: bc38feddeb ("io: fsync before closing a file channel")
Reviewed-by: "Daniel P. Berrangé" <berrange@redhat.com>
Signed-off-by: Fabiano Rosas <farosas@suse.de>
Link: https://lore.kernel.org/r/20240305195629.9922-1-farosas@suse.de
Link: https://lore.kernel.org/r/20240305174332.2553-1-farosas@suse.de
[peterx: add more comment to the qio_channel_close()]
Signed-off-by: Peter Xu <peterx@redhat.com>
2024-03-11 14:41:40 -04:00
Cédric Le Goater
e6e08e8323 migration: Do not call PRECOPY_NOTIFY_SETUP notifiers in case of error
When commit bd2270608f ("migration/ram.c: add a notifier chain for
precopy") added PRECOPY_NOTIFY_SETUP notifiers at the end of
qemu_savevm_state_setup(), it didn't take into account a possible
error in the loop calling vmstate_save() or .save_setup() handlers.

Check ret value before calling the notifiers.

Reviewed-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Cédric Le Goater <clg@redhat.com>
Link: https://lore.kernel.org/r/20240304122844.1888308-10-clg@redhat.com
Signed-off-by: Peter Xu <peterx@redhat.com>
2024-03-11 14:41:40 -04:00
Cédric Le Goater
ee8bb867ec migration: Add documentation for SaveVMHandlers
The SaveVMHandlers structure is still in use for complex subsystems
and devices. Document the handlers since we are going to modify a few
later.

Reviewed-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Cédric Le Goater <clg@redhat.com>
Link: https://lore.kernel.org/r/20240304122844.1888308-9-clg@redhat.com
Signed-off-by: Peter Xu <peterx@redhat.com>
2024-03-11 14:41:40 -04:00
Cédric Le Goater
f61efdee1e migration: Remove SaveStateHandler and LoadStateHandler typedefs
They are only used once.

Reviewed-by: Fabiano Rosas <farosas@suse.de>
Reviewed-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Cédric Le Goater <clg@redhat.com>
Link: https://lore.kernel.org/r/20240304122844.1888308-8-clg@redhat.com
Signed-off-by: Peter Xu <peterx@redhat.com>
2024-03-11 14:41:40 -04:00
Cédric Le Goater
e8c44363fb migration: Report error when shutdown fails
This will help detect issues regarding I/O channels usage.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Cédric Le Goater <clg@redhat.com>
Link: https://lore.kernel.org/r/20240304122844.1888308-7-clg@redhat.com
Signed-off-by: Peter Xu <peterx@redhat.com>
2024-03-11 14:41:40 -04:00
Maksim Davydov
12ab1e4fe8 migration/ram: add additional check
If a migration stream is broken, the address and flag reading can return
zero. Thus, an irrelevant flag error will be returned instead of EIO.
It can be fixed by additional check after the reading.

Signed-off-by: Maksim Davydov <davydov-max@yandex-team.ru>
Link: https://lore.kernel.org/r/20240304144203.158477-1-davydov-max@yandex-team.ru
Signed-off-by: Peter Xu <peterx@redhat.com>
2024-03-11 14:41:40 -04:00
Avihai Horon
ff64e0ba81 vfio/migration: Add a note about migration rate limiting
VFIO migration buffer size is currently limited to 1MB. Therefore, there
is no need to check if migration rate exceeded, as in the worst case it
will exceed by only 1MB.

However, if the buffer size is later changed to a bigger value,
vfio_save_iterate() should enforce migration rate (similar to migration
RAM code).

Add a note about this in vfio_save_iterate() to serve as a reminder.

Suggested-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Avihai Horon <avihaih@nvidia.com>
Reviewed-by: Fabiano Rosas <farosas@suse.de>
Link: https://lore.kernel.org/r/20240304105339.20713-4-avihaih@nvidia.com
Signed-off-by: Peter Xu <peterx@redhat.com>
2024-03-11 14:41:40 -04:00
Avihai Horon
3f6ed59ec4 vfio/migration: Refactor vfio_save_state() return value
Currently, vfio_save_state() returns 1 regardless of whether there is
more data to send or not. This was done to prevent a fast changing VFIO
device from potentially blocking other devices from sending their data,
as qemu_savevm_state_iterate() serialized devices.

Now that qemu_savevm_state_iterate() no longer serializes devices, there
is no need for that.

Refactor vfio_save_state() to return 0 if more data is available and 1
if no more data is available.

Signed-off-by: Avihai Horon <avihaih@nvidia.com>
Reviewed-by: Fabiano Rosas <farosas@suse.de>
Link: https://lore.kernel.org/r/20240304105339.20713-3-avihaih@nvidia.com
Signed-off-by: Peter Xu <peterx@redhat.com>
2024-03-11 14:41:40 -04:00
Avihai Horon
4e1871c450 migration: Don't serialize devices in qemu_savevm_state_iterate()
Commit 90697be889 ("live migration: Serialize vmstate saving in stage
2") introduced device serialization in qemu_savevm_state_iterate(). The
rationale behind it was to first complete migration of slower changing
block devices and only then migrate the RAM, to avoid sending fast
changing RAM pages over and over.

This commit was added a long time ago, and while it was useful back
then, it is not the case anymore:
1. Block migration is deprecated, see commit 66db46ca83 ("migration:
   Deprecate block migration").
2. Today there are other iterative devices besides RAM and block, such
   as VFIO, which are registered for migration after RAM. With current
   serialization behavior, a fast changing device can block other
   devices from sending their data, which may prevent migration from
   converging in some cases.

The issue described in item 2 was observed in several VFIO migration
scenarios with switchover-ack capability enabled, where some workload on
the VM prevented RAM from ever reaching a hard zero, thus blocking VFIO
initial pre-copy data from being sent. Hence, destination could not ack
switchover and migration could not converge.

Fix that by not serializing iterative devices in
qemu_savevm_state_iterate().

Note that this still doesn't fully prevent device starvation. As
correctly pointed out by Peter [1], a fast changing device might
constantly consume all allocated bandwidth and block the following
devices. However, this scenario is more likely to happen only if
max-bandwidth is low.

[1] https://lore.kernel.org/qemu-devel/Zd6iw9dBhW6wKNxx@x1n/

Signed-off-by: Avihai Horon <avihaih@nvidia.com>
Reviewed-by: Fabiano Rosas <farosas@suse.de>
Link: https://lore.kernel.org/r/20240304105339.20713-2-avihaih@nvidia.com
Signed-off-by: Peter Xu <peterx@redhat.com>
2024-03-11 14:41:40 -04:00
Ani Sinha
5dd6bfd90d docs: update copyright date to the year 2024
We are already in the third month of 2024 but the copyright notices still refer
to 2023. Update the date to 2024 in documentation and help texts.

Cc: peter.maydell@linaro.org
Cc: qemu-trivial@nongnu.org
Signed-off-by: Ani Sinha <anisinha@redhat.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20240311120346.9596-1-anisinha@redhat.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2024-03-11 17:21:21 +00:00
Akihiko Odaki
98d16e5f72 contrib/elf2dmp: Ensure phdrs fit in file
Callers of elf64_getphdr() and elf_getphdrnum() assume phdrs are
accessible.

Resolves: https://gitlab.com/qemu-project/qemu/-/issues/2202
Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Tested-by: Viktor Prutyanov <viktor.prutyanov@phystech.edu>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20240307-elf2dmp-v4-19-4f324ad4d99d@daynix.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2024-03-11 17:06:27 +00:00
Akihiko Odaki
9de37c2883 contrib/elf2dmp: Clamp QEMU note to file size
This fixes crashes with truncated dumps.

Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Tested-by: Viktor Prutyanov <viktor.prutyanov@phystech.edu>
Message-id: 20240307-elf2dmp-v4-18-4f324ad4d99d@daynix.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2024-03-11 17:06:27 +00:00
Akihiko Odaki
0c94e32dff contrib/elf2dmp: Use GPtrArray
This removes the need to enumarate QEMUCPUState twice and saves code.

Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Tested-by: Viktor Prutyanov <viktor.prutyanov@phystech.edu>
Message-id: 20240307-elf2dmp-v4-17-4f324ad4d99d@daynix.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2024-03-11 17:06:27 +00:00
Akihiko Odaki
a2de23c6e3 MAINTAINERS: Add Akihiko Odaki as a elf2dmp reviewer
Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Tested-by: Viktor Prutyanov <viktor.prutyanov@phystech.edu>
Reviewed-by: Viktor Prutyanov <viktor.prutyanov@phystech.edu>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-id: 20240307-elf2dmp-v4-15-4f324ad4d99d@daynix.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2024-03-11 17:06:06 +00:00