The VirtIOFeature structure isn't modified, mark it const.
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20210511104157.2880306-2-philmd@redhat.com>
The MSYS2 task in the Cirrus-CI is currently failing with error messages
like this:
warning: database file for 'ucrt64' does not exist (use '-Sy' to download)
:: Starting core system upgrade...
there is nothing to do
:: Starting full system upgrade...
error: failed to prepare transaction (could not find database)
Seems like it can be fixed by switching to a newer release and by refreshing
the database one more time after changing the /etc/pacman.conf file.
Message-Id: <20210504100223.25427-30-alex.bennee@linaro.org>
Reviewed-by: Yonggang Luo <luoyonggang@gmail.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
The default "alabaster" sphinx theme has a couple shortcomings:
- the navbar moves along the page
- the search bar is not always at the same place
- it lacks some contrast and colours
The "rtd" theme from readthedocs.org is a popular third party theme used
notably by the kernel, with a custom style sheet. I like it better,
perhaps others do too. It also simplifies the "Edit on Gitlab" links.
Tweak a bit the custom theme to match qemu.org style, use the
QEMU logo, and favicon etc.
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Tested-by: Bin Meng <bmeng.cn@gmail.com>
Message-Id: <20210323115328.4146052-1-marcandre.lureau@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Fix of the 2021-05-11 version, with a fix to build on the armhf
cross.
The largest change in this set is David's changes for ram block size
changing; then there's a pile of other cleanups and fixes.
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
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Merge remote-tracking branch 'remotes/dgilbert/tags/pull-migration-20210513a' into staging
Migration pull 2021-05-13
Fix of the 2021-05-11 version, with a fix to build on the armhf
cross.
The largest change in this set is David's changes for ram block size
changing; then there's a pile of other cleanups and fixes.
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
# gpg: Signature made Thu 13 May 2021 18:36:06 BST
# gpg: using RSA key 45F5C71B4A0CB7FB977A9FA90516331EBC5BFDE7
# gpg: Good signature from "Dr. David Alan Gilbert (RH2) <dgilbert@redhat.com>" [full]
# Primary key fingerprint: 45F5 C71B 4A0C B7FB 977A 9FA9 0516 331E BC5B FDE7
* remotes/dgilbert/tags/pull-migration-20210513a:
tests/migration: introduce multifd into guestperf
tests/qtest/migration-test: Use g_autofree to avoid leaks on error paths
tests/migration-test: Fix "true" vs true
migration/ram: Use offset_in_ramblock() in range checks
migration/multifd: Print used_length of memory block
migration/ram: Handle RAM block resizes during postcopy
migration/ram: Simplify host page handling in ram_load_postcopy()
migration/ram: Discard RAM when growing RAM blocks after ram_postcopy_incoming_init()
exec: Relax range check in ram_block_discard_range()
migration/ram: Handle RAM block resizes during precopy
numa: Make all callbacks of ram block notifiers optional
numa: Teach ram block notifiers about resizeable ram blocks
util: vfio-helpers: Factor out and fix processing of existing ram blocks
migration: Drop redundant query-migrate result @blocked
migration/ram: Optimize ram_save_host_page()
migration/ram: Reduce unnecessary rate limiting
migrate/ram: remove "ram_bulk_stage" and "fpo_enabled"
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Clang versions before v11.0 insist on having the %rX or %cX register
names instead of just a number. Since our Travis-CI is currently
still using Clang v6.0, we have to fix this to avoid failing jobs.
Message-Id: <20210512171550.476130-2-thuth@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Coverity notices that several places in the migration-test code fail
to free memory in error-exit paths. This is pretty unimportant in
test case code, but we can avoid having to manually free the memory
entirely by using g_autofree.
The places where Coverity spotted a leak were relating to early exits
not freeing 'uri' in test_precopy_unix(), do_test_validate_uuid(),
migrate_postcopy_prepare() and test_migrate_auto_converge(). This
patch converts all the string-allocation in the test code to
g_autofree for consistency.
Fixes: Coverity CID 1432313, 1432315, 1432352, 1432364
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Message-Id: <20210506185819.9010-1-peter.maydell@linaro.org>
Signed-off-by: Thomas Huth <thuth@redhat.com>
We are generating a lot of target-specific defines in the *-config-devices.h
and *-config-target.h files. Using them in common code is wrong and leads
to very subtle bugs since a "#ifdef CONFIG_SOMETHING" is not working there
as expected. To avoid these issues, we are already poisoning many of the
macros in include/exec/poison.h - but it's cumbersome to maintain this
list manually. Thus let's generate an additional list of poisoned macros
automatically from the current config switches - this should give us a
much better test coverage via the different CI configurations.
Note that CONFIG_TCG (which is also defined in config-host.h) and
CONFIG_USER_ONLY are special, so we have to filter these out.
Message-Id: <20210414112004.943383-5-thuth@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
The CONFIG_VFIO switch only works in target specific code. Since
migration/migration.c is common code, the #ifdef does not have
the intended behavior here. Move the related code to a separate
file now which gets compiled via specific_ss instead.
Fixes: 3710586caa ("qapi: Add VFIO devices migration stats in Migration stats")
Message-Id: <20210414112004.943383-3-thuth@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
We are already poisoning CONFIG_KVM since this switch is not working
in common code. Do the same with the other accelerator switches, too
(except for CONFIG_TCG, which is special, since it is also defined in
config-host.h).
Message-Id: <20210414112004.943383-2-thuth@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
For us, assertions are always enabled, but side-effect expressions
inside the argument to g_assert() are bad style anyway. Fix three
occurrences in IPMI related tests, which will silence some Coverity
nits.
Fixes: CID 1432322, CID 1432287, CID 1432291
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20210503165525.26221-4-peter.maydell@linaro.org>
Signed-off-by: Thomas Huth <thuth@redhat.com>
In rtc-test.c we know that s is non-NULL because qtest_start()
will return a non-NULL value, and we assume this when we
pass s to qtest_irq_intercept_in(). So we can drop the
initial assignment of NULL and the "if (s)" condition at
the end of the function.
Fixes: Coverity CID 1432353
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20210503165525.26221-3-peter.maydell@linaro.org>
Signed-off-by: Thomas Huth <thuth@redhat.com>
tpm_util_migration_start_qemu() allocates memory with g_strdup_printf()
but frees it with free() rather than g_free(), which provokes Coverity
complaints (CID 1432379, 1432350). Use the correct free function.
Fixes: Coverity CID 1432379, CID 1432350
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Stefan Berger <stefanb@linux.ibm.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20210503165525.26221-2-peter.maydell@linaro.org>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Accidental use of "true" as a boolean; spotted by coverity
and Peter.
Fixes: b99784ef6c
Fixes: d795f47466
Reported-by: Peter Maydell <peter.maydell@linaro.org>
Reported-by: Coverity (CID 1432373, 1432292, 1432288)
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20210504100545.112213-1-dgilbert@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
In the glib API, the distinction between g_assert() and
g_assert_true() is that the former is for "bug, terminate the
application" and the latter is for "test check, on failure either
terminate or just mark the testcase as failed". For QEMU, g_assert()
is always fatal, so code can assume that if the assertion fails
execution does not proceed, but this is not true of g_assert_true().
In npcm7xx_pwm-test, the pwm_index() and pwm_module_index() functions
include some assertions that are just guarding against possible bugs
in the test code that might lead us to out-of-bounds array accesses.
These should use g_assert() because they aren't part of what the test
is testing and the code does not correctly handle the case where the
condition was false.
This fixes some Coverity issues where Coverity knows that
g_assert_true() can continue when the condition is false and
complains about the possible array overrun at various callsites.
Fixes: Coverity CID 1442340, 1442341, 1442343, 1442344, 1442345, 1442346
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Hao Wu <wuhaotsh@google.com>
Reviewed-by: Havard Skinnemoen <hskinnemoen@google.com>
Message-Id: <20210505135516.21097-1-peter.maydell@linaro.org>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Coverity notes that when calculating the 64-bit iso_size value in
ahci_test_cdrom() we actually only do it with 32-bit arithmetic.
This doesn't matter for the current test code because nsectors is
always small; but adding the cast avoids the coverity complaints.
Fixes: Coverity CID 1432343
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Message-Id: <20210506194358.3925-1-peter.maydell@linaro.org>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Replaced a call to malloc() and its respective call to free()
with g_malloc() and g_free().
g_malloc() is preferred more than g_try_* functions, which
return NULL on error, when the size of the requested
allocation is small. This is because allocating few
bytes should not be a problem in a healthy system.
Otherwise, the system is already in a critical state.
Subsequently, removed NULL-checking after g_malloc().
Signed-off-by: Mahmoud Mandour <ma.mandourr@gmail.com>
Message-Id: <20210315105814.5188-3-ma.mandourr@gmail.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Some downstreams rename the QEMU binary to "qemu-kvm". This breaks
qtest_get_arch(), which attempts to parse the target architecture from
the QTEST_QEMU_BINARY environment variable.
Print an error instead of returning the architecture "kvm". Things fail
in weird ways when the architecture string is bogus.
Arguably qtests should always be run in a build directory instead of
against an installed QEMU. In any case, printing a clear error when this
happens is helpful.
Since this is an error that is triggered by the user and not a test
failure, use exit(1) instead of abort(). Change the existing abort()
call in qtest_get_arch() to exit(1) too for the same reason and to be
consistent.
Reported-by: Qin Wang <qinwang@rehdat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Cc: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Message-Id: <20210412143050.725918-1-stefanha@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
It can be tricky to troubleshoot qos-test when a test won't execute. Add
an explanation of how to trace qgraph node connectivity and find which
node has the problem.
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-Id: <20210412143437.727560-3-stefanha@redhat.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-Id: <20210412143437.727560-2-stefanha@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
'extends' is an alternative to using YAML anchors
and is a little more flexible and readable. See:
https://docs.gitlab.com/ee/ci/yaml/#extends
Reviewed-by: Wainer dos Santos Moschetta <wainersm@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20210418233448.1267991-4-f4bug@amsat.org>
Signed-off-by: Thomas Huth <thuth@redhat.com>
'extends' is an alternative to using YAML anchors
and is a little more flexible and readable. See:
https://docs.gitlab.com/ee/ci/yaml/#extends
Reviewed-by: Wainer dos Santos Moschetta <wainersm@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20210418233448.1267991-3-f4bug@amsat.org>
Signed-off-by: Thomas Huth <thuth@redhat.com>
'extends' is an alternative to using YAML anchors
and is a little more flexible and readable. See:
https://docs.gitlab.com/ee/ci/yaml/#extends
Reviewed-by: Wainer dos Santos Moschetta <wainersm@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20210418233448.1267991-2-f4bug@amsat.org>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Make sure that ccache is available in all containers.
Message-Id: <20210414081907.871437-2-thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Guestperf tool does not cover the multifd-enabled migration
currently, it is worth supporting so that developers can
analysis the migration performance with all kinds of
migration.
To request that multifd is enabled, with 4 channels:
$ ./tests/migration/guestperf.py \
--multifd --multifd-channels 4 --output output.json
To run the entire standardized set of multifd-enabled
comparisons, with unix migration:
$ ./tests/migration/guestperf-batch.py \
--dst-host localhost --transport unix \
--filter compr-multifd* --output outputdir
Signed-off-by: Hyman Huang(黄勇) <huangy81@chinatelecom.cn>
Message-Id: <cfeeb04d17ad932c42a9871294058b77429ad1b7.1616171924.git.huangy81@chinatelecom.cn>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Coverity notices that several places in the migration-test code fail
to free memory in error-exit paths. This is pretty unimportant in
test case code, but we can avoid having to manually free the memory
entirely by using g_autofree.
The places where Coverity spotted a leak were relating to early exits
not freeing 'uri' in test_precopy_unix(), do_test_validate_uuid(),
migrate_postcopy_prepare() and test_migrate_auto_converge(). This
patch converts all the string-allocation in the test code to
g_autofree for consistency.
Fixes: Coverity CID 1432313, 1432315, 1432352, 1432364
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-Id: <20210506185819.9010-1-peter.maydell@linaro.org>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Accidental use of "true" as a boolean; spotted by coverity
and Peter.
Fixes: b99784ef6c
Fixes: d795f47466
Reported-by: Peter Maydell <peter.maydell@linaro.org>
Reported-by: Coverity (CID 1432373, 1432292, 1432288)
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Message-Id: <20210504100545.112213-1-dgilbert@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
We never read or write beyond the used_length of memory blocks when
migrating. Make this clearer by using offset_in_ramblock() consistently.
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20210429112708.12291-11-david@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
We actually want to print the used_length, against which we check.
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20210429112708.12291-10-david@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Resizing while migrating is dangerous and does not work as expected.
The whole migration code works with the usable_length of a ram block and
does not expect this value to change at random points in time.
In the case of postcopy, relying on used_length is racy as soon as the
guest is running. Also, when used_length changes we might leave the
uffd handler registered for some memory regions, reject valid pages
when migrating and fail when sending the recv bitmap to the source.
Resizing can be trigger *after* (but not during) a reset in
ACPI code by the guest
- hw/arm/virt-acpi-build.c:acpi_ram_update()
- hw/i386/acpi-build.c:acpi_ram_update()
Let's remember the original used_length in a separate variable and
use it in relevant postcopy code. Make sure to update it when we resize
during precopy, when synchronizing the RAM block sizes with the source.
Reviewed-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20210429112708.12291-9-david@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Add two new helper functions. This will come in come handy once we want to
handle ram block resizes while postcopy is active.
Note that ram_block_from_stream() will already print proper errors.
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20210429112708.12291-8-david@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
dgilbert: Added brackets in host_page_from_ram_block_offset
to cause uintptr_t to cast the sum, to fix armhf-cross build
In case we grow our RAM after ram_postcopy_incoming_init() (e.g., when
synchronizing the RAM block state with the migration source), the resized
part would not get discarded. Let's perform that when being notified
about a resize while postcopy has been advised, but is not listening
yet. With precopy, the process is as following:
1. VM created
- RAM blocks are created
2. Incomming migration started
- Postcopy is advised
- All pages in RAM blocks are discarded
3. Precopy starts
- RAM blocks are resized to match the size on the migration source.
- RAM pages from precopy stream are loaded
- Uffd handler is registered, postcopy starts listening
4. Guest started, postcopy running
- Pagefaults get resolved, pages get placed
Reviewed-by: Peter Xu <peterx@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20210429112708.12291-7-david@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
We want to make use of ram_block_discard_range() in the RAM block resize
callback when growing a RAM block, *before* used_length is changed.
Let's relax the check. As RAM blocks always mmap the whole max_length area,
we cannot corrupt unrelated data.
Reviewed-by: Peter Xu <peterx@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20210429112708.12291-6-david@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Resizing while migrating is dangerous and does not work as expected.
The whole migration code works on the usable_length of ram blocks and does
not expect this to change at random points in time.
In the case of precopy, the ram block size must not change on the source,
after syncing the RAM block list in ram_save_setup(), so as long as the
guest is still running on the source.
Resizing can be trigger *after* (but not during) a reset in
ACPI code by the guest
- hw/arm/virt-acpi-build.c:acpi_ram_update()
- hw/i386/acpi-build.c:acpi_ram_update()
Use the ram block notifier to get notified about resizes. Let's simply
cancel migration and indicate the reason. We'll continue running on the
source. No harm done.
Update the documentation. Postcopy will be handled separately.
Reviewed-by: Peter Xu <peterx@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20210429112708.12291-5-david@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Manual merge
Let's make add/remove optional. We want to introduce a RAM block
notifier for RAM migration that is only interested in resize events.
Reviewed-by: Peter Xu <peterx@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20210429112708.12291-4-david@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Ram block notifiers are currently not aware of resizes. To properly
handle resizes during migration, we want to teach ram block notifiers about
resizeable ram.
Introduce the basic infrastructure but keep using max_size in the
existing notifiers. Supply the max_size when adding and removing ram
blocks. Also, notify on resizes.
Acked-by: Paul Durrant <paul@xen.org>
Reviewed-by: Peter Xu <peterx@redhat.com>
Cc: xen-devel@lists.xenproject.org
Cc: haxm-team@intel.com
Cc: Paul Durrant <paul@xen.org>
Cc: Stefano Stabellini <sstabellini@kernel.org>
Cc: Anthony Perard <anthony.perard@citrix.com>
Cc: Wenchao Wang <wenchao.wang@intel.com>
Cc: Colin Xu <colin.xu@intel.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20210429112708.12291-3-david@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Factor it out into common code when a new notifier is registered, just
as done with the memory region notifier. This keeps logic about how to
process existing ram blocks at a central place.
Just like when adding a new ram block, we have to register the max_length.
Ram blocks are only "fake resized". All memory (max_length) is mapped.
Print the warning from inside qemu_vfio_ram_block_added().
Reviewed-by: Peter Xu <peterx@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20210429112708.12291-2-david@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Result @blocked is redundant. Unfortunately, we realized this too
close to the release to risk dropping it, so we deprecated it
instead, in commit e11ce6c06.
Since it was deprecated from the start, we can delete it without
the customary grace period. Do so.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <20210429140424.2802929-1-armbru@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Starting from pss->page, ram_save_host_page() will check every page
and send the dirty pages up to the end of the current host page or
the boundary of used_length of the block. If the host page size is
a huge page, the step "check" will take a lot of time.
It will improve performance to use migration_bitmap_find_dirty().
Tested on Kunpeng 920; VM parameters: 1U 4G (page size 1G)
The time of ram_save_host_page() in the last round of ram saving:
before optimize: 9250us after optimize: 34us
Signed-off-by: Keqian Zhu <zhukeqian1@huawei.com>
Signed-off-by: Kunkun Jiang <jiangkunkun@huawei.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Message-Id: <20210316125716.1243-3-jiangkunkun@huawei.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
When the host page is a huge page and something is sent in the
current iteration, migration_rate_limit() should be executed.
If not, it can be omitted.
Signed-off-by: Keqian Zhu <zhukeqian1@huawei.com>
Signed-off-by: Kunkun Jiang <jiangkunkun@huawei.com>
Reviewed-by: David Edmondson <david.edmondson@oracle.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Message-Id: <20210316125716.1243-2-jiangkunkun@huawei.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
The bulk stage is kind of weird: migration_bitmap_find_dirty() will
indicate a dirty page, however, ram_save_host_page() will never save it, as
migration_bitmap_clear_dirty() detects that it is not dirty.
We already fill the bitmap in ram_list_init_bitmaps() with ones, marking
everything dirty - it didn't used to be that way, which is why we needed
an explicit first bulk stage.
Let's simplify: make the bitmap the single source of thuth. Explicitly
handle the "xbzrle_enabled after first round" case.
Regarding XBZRLE (implicitly handled via "ram_bulk_stage = false" right
now), there is now a slight change in behavior:
- Colo: When starting, it will be disabled (was implicitly enabled)
until the first round actually finishes.
- Free page hinting: When starting, XBZRLE will be disabled (was implicitly
enabled) until the first round actually finished.
- Snapshots: When starting, XBZRLE will be disabled. We essentially only
do a single run, so I guess it will never actually get disabled.
Postcopy seems to indirectly disable it in ram_save_page(), so there
shouldn't be really any change.
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Juan Quintela <quintela@redhat.com>
Cc: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
Cc: Andrey Gruzdev <andrey.gruzdev@virtuozzo.com>
Cc: Peter Xu <peterx@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20210216105039.40680-1-david@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Running the WDR opcode triggers a segfault:
$ cat > foo.S << EOF
> __start:
> wdr
> EOF
$ avr-gcc -nostdlib -nostartfiles -mmcu=avr6 foo.S -o foo.elf
$ qemu-system-avr -serial mon:stdio -nographic -no-reboot \
-M mega -bios foo.elf -d in_asm --singlestep
IN:
0x00000000: WDR
Segmentation fault (core dumped)
(gdb) bt
#0 0x00005555add0b23a in gdb_get_cpu_pid (cpu=0x5555af5a4af0) at ../gdbstub.c:718
#1 0x00005555add0b2dd in gdb_get_cpu_process (cpu=0x5555af5a4af0) at ../gdbstub.c:743
#2 0x00005555add0e477 in gdb_set_stop_cpu (cpu=0x5555af5a4af0) at ../gdbstub.c:2742
#3 0x00005555adc99b96 in cpu_handle_guest_debug (cpu=0x5555af5a4af0) at ../softmmu/cpus.c:306
#4 0x00005555adcc66ab in rr_cpu_thread_fn (arg=0x5555af5a4af0) at ../accel/tcg/tcg-accel-ops-rr.c:224
#5 0x00005555adefaf12 in qemu_thread_start (args=0x5555af5d9870) at ../util/qemu-thread-posix.c:521
#6 0x00007f692d940ea5 in start_thread () from /lib64/libpthread.so.0
#7 0x00007f692d6699fd in clone () from /lib64/libc.so.6
Since the watchdog peripheral is not implemented, simply
log the opcode as unimplemented and keep going.
Reported-by: Fred Konrad <konrad@adacore.com>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: KONRAD Frederic <frederic.konrad@adacore.com>
Message-Id: <20210502190900.604292-1-f4bug@amsat.org>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
According to the as documentation:
(https://sourceware.org/binutils/docs-2.36/as/AVR-Options.html)
"Instruction set avr51 is for the enhanced AVR core with exactly 128K
program memory space (MCU types: atmega128, atmega128a, atmega1280,
atmega1281, atmega1284, atmega1284p, atmega128rfa1, atmega128rfr2,
atmega1284rfr2, at90can128, at90usb1286, at90usb1287, m3000)."
But when compiling a program for atmega1280 or avr51 and trying to execute
it:
$ cat > test.S << EOF
> loop:
> rjmp loop
> EOF
$ avr-gcc -nostdlib -nostartfiles -mmcu=atmega1280 test.S -o test.elf
$ qemu-system-avr -serial mon:stdio -nographic -no-reboot -M mega \
-bios test.elf
qemu-system-avr: Current machine: Arduino Mega (ATmega1280) with 'avr6' CPU
qemu-system-avr: ELF image 'test.elf' is for 'avr51' CPU
So this fixes the atmega1280 class to use an avr51 CPU.
Signed-off-by: Frederic Konrad <frederic.konrad@adacore.com>
Reviewed-by: Joaquin de Andres <me@xcancerberox.com.ar>
Message-Id: <1619637319-22299-1-git-send-email-frederic.konrad@adacore.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
If the get_physical_address() call fails, the SH4 get_phys_page_debug()
handler returns an uninitialized address. Instead return -1, which
correspond to "no page found" (see cpu_get_phys_page_debug() doc
string).
This fixes a warning emitted when building with CFLAGS=-O3
(using GCC 10.2.1 20201125):
target/sh4/helper.c: In function ‘superh_cpu_get_phys_page_debug’:
target/sh4/helper.c:446:12: warning: ‘physical’ may be used uninitialized in this function [-Wmaybe-uninitialized]
446 | return physical;
| ^~~~~~~~
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Yoshinori Sato <ysato@users.sourceforge.jp>
Message-Id: <20210505161046.1397608-1-f4bug@amsat.org>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Fixes an if statement that performs a logical AND of mutually exclusive
tests
Buglink: https://bugs.launchpad.net/qemu/+bug/1926995
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Jagannathan Raman <jag.raman@oracle.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-Id: <1620402803-9237-1-git-send-email-jag.raman@oracle.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Since its introduction in commit 5b85eabe68 ("acpi: add
acpi_dsdt_add_gpex") we build gpex-acpi.c if ACPI is selected,
even if the GPEX_HOST device isn't build. Add the missing
Kconfig dependency.
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Gerd Hoffmann <kraxel@redhat.com>
Message-Id: <20210425182124.3735214-1-f4bug@amsat.org>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
sparse-mem.c is added to the 'mem_ss' source set, which itself
is conditionally added to softmmu_ss if CONFIG_MEM_DEVICE is
selected.
But if CONFIG_MEM_DEVICE isn't selected, we get a link failure
even if CONFIG_FUZZ is selected:
/usr/bin/ld: tests_qtest_fuzz_generic_fuzz.c.o: in function `generic_pre_fuzz':
tests/qtest/fuzz/generic_fuzz.c:826: undefined reference to `sparse_mem_init'
clang-10: error: linker command failed with exit code 1 (use -v to see invocation)
Fix by adding sparse-mem.c directly to the softmmu_ss set.
Fixes: 230376d285 ("memory: add a sparse memory device for fuzzing")
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Alexander Bulekov <alxndr@bu.edu>
Message-Id: <20210406133944.4193691-1-philmd@redhat.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
get_relocated_path() allocates a GString object and returns the
character data (C string) to the caller without freeing the memory
allocated for that object as reported by valgrind:
24 bytes in 1 blocks are definitely lost in loss record 2,805 of 6,532
at 0x4839809: malloc (vg_replace_malloc.c:307)
by 0x55AABB8: g_malloc (in /usr/lib64/libglib-2.0.so.0.6600.8)
by 0x55C2481: g_slice_alloc (in /usr/lib64/libglib-2.0.so.0.6600.8)
by 0x55C4827: g_string_sized_new (in /usr/lib64/libglib-2.0.so.0.6600.8)
by 0x55C4CEA: g_string_new (in /usr/lib64/libglib-2.0.so.0.6600.8)
by 0x906314: get_relocated_path (cutils.c:1036)
by 0x6E1F77: qemu_read_default_config_file (vl.c:2122)
by 0x6E1F77: qemu_init (vl.c:2687)
by 0x3E3AF8: main (main.c:49)
Let's use g_string_free(gstring, false) to free only the GString object
and transfer the ownership of the character data to the caller.
Fixes: f4f5ed2cbd ("cutils: introduce get_relocated_path")
Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20210412170255.231406-1-sgarzare@redhat.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
TYPE_MC146818_RTC is an ISA device, so its DeviceClass::reset()
handler is called automatically when its qbus parent is reset
(we don't need to register it manually).
We have 2 reset() methods: a generic one and the qdev one.
Merge them into a reset_enter handler (keeping the IRQ lowering
to a reset_hold one), and remove the qemu_register_reset() call.
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Message-Id: <20210502163931.552675-3-f4bug@amsat.org>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
TYPE_ETRAX_FS_TIMER is a sysbus device, so its DeviceClass::reset()
handler is called automatically when its qbus parent is reset
(we don't need to register it manually).
Convert the generic reset to a enter/hold resettable ones, and
remove the qemu_register_reset() call.
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Message-Id: <20210502163931.552675-2-f4bug@amsat.org>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
