Warner Losh [Fri, 28 Jul 2023 16:29:27 +0000 (10:29 -0600)]
bsd-user: Specify host page alignment if none specified
We're hitting an assert when we pass in alignment == 0 since that's not
a power of two. so pass in the ideal page size.
Signed-off-by: Warner Losh <imp@bsdimp.com>
Message-Id: <20230728162927.5009-1-imp@bsdimp.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
With reserved_va, mmap.c expects to have pre-allocated host address
space for the entire guest address space. When combined with the -B
command-line option, ensure that the chosen address does not overlap
anything else. Ensure that mmap_next_start is within reserved_va,
as we use it within mmap.c without checking.
Reviewed by: Warner Losh <imp@bsdimp.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230727161148.444988-1-richard.henderson@linaro.org>
accel/tcg: Clear tcg_ctx->gen_tb on buffer overflow
On overflow of code_gen_buffer, we unlock the guest pages we had been
translating, but failed to clear gen_tb. On restart, if we cannot
allocate a TB, we exit to the main loop to perform the flush of all
TBs as soon as possible. With garbage in gen_tb, we hit an assert:
util/interval-tree: Use qatomic_read/set for rb_parent_color
While less susceptible to optimization problems than left and right,
interval_tree_iter_next also reads rb_parent(), so make sure that
stores and loads are atomic.
This goes further than technically required, changing all loads to
be atomic, rather than simply the ones in the iteration side. But
it doesn't really affect the code generation on the rebalance side
and is cleaner to handle everything the same.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
util/interval-tree: Use qatomic_set_mb in rb_link_node
Ensure that the stores to rb_left and rb_right are complete before
inserting the new node into the tree. Otherwise a concurrent reader
could see garbage in the new leaf.
Cc: qemu-stable@nongnu.org Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
* tag 'pull-target-arm-20230731' of https://git.linaro.org/people/pmaydell/qemu-arm:
gdbstub: Fix client Ctrl-C handling
kvm: Fix crash due to access uninitialized kvm_state
target/arm/tcg: Don't build AArch64 decodetree files for qemu-system-arm
target/arm: Avoid writing to constant TCGv in trans_CSEL()
elf2dmp: Don't abandon when Prcb is set to 0
target/arm: Fix MemOp for STGP
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Nicholas Piggin [Tue, 11 Jul 2023 08:59:03 +0000 (18:59 +1000)]
gdbstub: Fix client Ctrl-C handling
The gdb remote protocol has a special interrupt character (0x03) that is
transmitted outside the regular packet processing, and represents a
Ctrl-C pressed in the client. Despite not being a regular packet, it
does expect a regular stop response if the stub successfully stops the
running program.
Inhibiting the stop reply packet can lead to gdb client hang. So permit
a stop response when receiving a character from gdb that stops the vm.
Additionally, add a warning if that was not a 0x03 character, because
the gdb session is likely to end up getting confused if this happens.
Cc: qemu-stable@nongnu.org Fixes: 758370052fb ("gdbstub: only send stop-reply packets when allowed to") Reported-by: Frederic Barrat <fbarrat@linux.ibm.com> Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Tested-by: Joel Stanley <joel@jms.id.au>
Message-id: 20230711085903.304496-1-npiggin@gmail.com Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
kvm: Fix crash due to access uninitialized kvm_state
Runs into core dump on arm64 and the backtrace extracted from the
core dump is shown as below. It's caused by accessing uninitialized
@kvm_state in kvm_flush_coalesced_mmio_buffer() due to commit 176d073029
("hw/arm/virt: Use machine_memory_devices_init()"), where the machine's
memory region is added earlier than before.
Peter Maydell [Tue, 18 Jul 2023 10:46:28 +0000 (11:46 +0100)]
target/arm/tcg: Don't build AArch64 decodetree files for qemu-system-arm
Currently we list all the Arm decodetree files together and add them
unconditionally to arm_ss. This means we build them for both
qemu-system-aarch64 and qemu-system-arm. However, some of them are
AArch64-specific, so there is no need to build them for
qemu-system-arm. (Meson is smart enough to notice that the generated
.c.inc file is not used by any objects that go into qemu-system-arm,
so we only unnecessarily run decodetree, not anything more
heavyweight like a recompile or relink, but it's still unnecessary
work.)
Split gen into gen_a32 and gen_a64, and only add gen_a64 for
TARGET_AARCH64 compiles.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-id: 20230718104628.1137734-1-peter.maydell@linaro.org
Peter Maydell [Thu, 27 Jul 2023 10:39:06 +0000 (11:39 +0100)]
target/arm: Avoid writing to constant TCGv in trans_CSEL()
In commit 0b188ea05acb5 we changed the implementation of
trans_CSEL() to use tcg_constant_i32(). However, this change
was incorrect, because the implementation of the function
sets up the TCGv_i32 rn and rm to be either zero or else
a TCG temp created in load_reg(), and these TCG temps are
then in both cases written to by the emitted TCG ops.
The result is that we hit a TCG assertion:
(or on a non-debug build, just produce a garbage result)
Adjust the code so that rn and rm are always writeable
temporaries whether the instruction is using the special
case "0" or a normal register as input.
Cc: qemu-stable@nongnu.org Fixes: 0b188ea05acb5 ("target/arm: Use tcg_constant in trans_CSEL") Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20230727103906.2641264-1-peter.maydell@linaro.org
Akihiko Odaki [Sun, 11 Jun 2023 03:34:34 +0000 (12:34 +0900)]
elf2dmp: Don't abandon when Prcb is set to 0
Prcb may be set to 0 for some CPUs if the dump was taken before they
start. The dump may still contain valuable information for started CPUs
so don't abandon conversion in such a case.
Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com> Reviewed-by: Viktor Prutyanov <viktor.prutyanov@phystech.edu>
Message-id: 20230611033434.14659-1-akihiko.odaki@daynix.com Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Klaus Jensen [Thu, 20 Jul 2023 09:42:24 +0000 (11:42 +0200)]
hw/nvme: use stl/ldl pci dma api
Use the stl/ldl pci dma api for writing/reading doorbells. This removes
the explicit endian conversions.
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Cédric Le Goater <clg@redhat.com> Tested-by: Cédric Le Goater <clg@redhat.com> Reviewed-by: Thomas Huth <thuth@redhat.com> Signed-off-by: Klaus Jensen <k.jensen@samsung.com>
* tag 'block-pull-request' of https://gitlab.com/stefanha/qemu:
block/blkio: use blkio_set_int("fd") to check fd support
block/blkio: fall back on using `path` when `fd` setting fails
block/blkio: retry blkio_connect() if it fails using `fd`
block/blkio: move blkio_connect() in the drivers functions
block: Fix pad_request's request restriction
block/file-posix: fix g_file_get_contents return path
block/blkio: do not use open flags in qemu_open()
block/blkio: enable the completion eventfd
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
block/blkio: use blkio_set_int("fd") to check fd support
Setting the `fd` property fails with virtio-blk-* libblkio drivers
that do not support fd passing since
https://gitlab.com/libblkio/libblkio/-/merge_requests/208.
Getting the `fd` property, on the other hand, always succeeds for
virtio-blk-* libblkio drivers even when they don't support fd passing.
This patch switches to setting the `fd` property because it is a
better mechanism for probing fd passing support than getting the `fd`
property.
Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
Message-id: 20230727161020.84213-5-sgarzare@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
block/blkio: fall back on using `path` when `fd` setting fails
qemu_open() fails if called with an unix domain socket in this way:
-blockdev node-name=drive0,driver=virtio-blk-vhost-user,path=vhost-user-blk.sock,cache.direct=on: Could not open 'vhost-user-blk.sock': No such device or address
Since virtio-blk-vhost-user does not support fd passing, let`s always fall back
on using `path` if we fail the fd passing.
Fixes: cad2ccc395 ("block/blkio: use qemu_open() to support fd passing for virtio-blk") Reported-by: Qing Wang <qinwang@redhat.com> Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
Message-id: 20230727161020.84213-4-sgarzare@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
block/blkio: retry blkio_connect() if it fails using `fd`
libblkio 1.3.0 added support of "fd" property for virtio-blk-vhost-vdpa
driver. In QEMU, starting from commit cad2ccc395 ("block/blkio: use
qemu_open() to support fd passing for virtio-blk") we are using
`blkio_get_int(..., "fd")` to check if the "fd" property is supported
for all the virtio-blk-* driver.
Unfortunately that property is also available for those driver that do
not support it, such as virtio-blk-vhost-user.
So, `blkio_get_int()` is not enough to check whether the driver supports
the `fd` property or not. This is because the virito-blk common libblkio
driver only checks whether or not `fd` is set during `blkio_connect()`
and fails with -EINVAL for those transports that do not support it
(all except vhost-vdpa for now).
So let's handle the `blkio_connect()` failure, retrying it using `path`
directly.
Fixes: cad2ccc395 ("block/blkio: use qemu_open() to support fd passing for virtio-blk") Suggested-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
Message-id: 20230727161020.84213-3-sgarzare@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Hanna Czenczek [Fri, 14 Jul 2023 08:59:38 +0000 (10:59 +0200)]
block: Fix pad_request's request restriction
bdrv_pad_request() relies on requests' lengths not to exceed SIZE_MAX,
which bdrv_check_qiov_request() does not guarantee.
bdrv_check_request32() however will guarantee this, and both of
bdrv_pad_request()'s callers (bdrv_co_preadv_part() and
bdrv_co_pwritev_part()) already run it before calling
bdrv_pad_request(). Therefore, bdrv_pad_request() can safely call
bdrv_check_request32() without expecting error, too.
In effect, this patch will not change guest-visible behavior. It is a
clean-up to tighten a condition to match what is guaranteed by our
callers, and which exists purely to show clearly why the subsequent
assertion (`assert(*bytes <= SIZE_MAX)`) is always true.
Note there is a difference between the interfaces of
bdrv_check_qiov_request() and bdrv_check_request32(): The former takes
an errp, the latter does not, so we can no longer just pass
&error_abort. Instead, we need to check the returned value. While we
do expect success (because the callers have already run this function),
an assert(ret == 0) is not much simpler than just to return an error if
it occurs, so let us handle errors by returning them up the stack now.
Reported-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Hanna Czenczek <hreitz@redhat.com>
Message-id: 20230714085938.202730-1-hreitz@redhat.com Fixes: 18743311b829cafc1737a5f20bc3248d5f91ee2a
("block: Collapse padded I/O vecs exceeding IOV_MAX") Signed-off-by: Hanna Czenczek <hreitz@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
The g_file_get_contents() function returns a g_boolean. If it fails, the
returned value will be 0 instead of -1. Solve the issue by skipping
assigning ret value.
This issue was found by Matthew Rosato using virtio-blk-{pci,ccw} backed
by an NVMe partition e.g. /dev/nvme0n1p1 on s390x.
Signed-off-by: Sam Li <faithilikerun@gmail.com> Reviewed-by: Matthew Rosato <mjrosato@linux.ibm.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Message-id: 20230727115844.8480-1-faithilikerun@gmail.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
qemu-nbd: regression with arguments passing into nbd_client_thread()
Unfortunately
commit 03b67621445d601c9cdc7dfe25812e9f19b81488
Author: Denis V. Lunev <den@openvz.org>
Date: Mon Jul 17 16:55:40 2023 +0200
qemu-nbd: pass structure into nbd_client_thread instead of plain char*
has introduced a regression. struct NbdClientOpts resides on stack inside
'if' block. This specifically means that this stack space could be reused
once the execution will leave that block of the code.
This means that parameters passed into nbd_client_thread could be
overwritten at any moment.
The patch moves the data to the namespace of main() function effectively
preserving it for the whole process lifetime.
Signed-off-by: Denis V. Lunev <den@openvz.org> CC: Eric Blake <eblake@redhat.com> CC: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru> CC: <qemu-stable@nongnu.org> Reviewed-by: Eric Blake <eblake@redhat.com>
Message-ID: <20230727105828.324314-1-den@openvz.org> Signed-off-by: Eric Blake <eblake@redhat.com>
qemu_open() in blkio_virtio_blk_common_open() is used to open the
character device (e.g. /dev/vhost-vdpa-0 or /dev/vfio/vfio) or in
the future eventually the unix socket.
In all these cases we cannot open the path in read-only mode,
when the `read-only` option of blockdev is on, because the exchange
of IOCTL commands for example will fail.
In order to open the device read-only, we have to use the `read-only`
property of the libblkio driver as we already do in blkio_file_open().
Fixes: cad2ccc395 ("block/blkio: use qemu_open() to support fd passing for virtio-blk") Buglink: https://bugzilla.redhat.com/show_bug.cgi?id=2225439 Reported-by: Qing Wang <qinwang@redhat.com> Signed-off-by: Stefano Garzarella <sgarzare@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Message-id: 20230726074807.14041-1-sgarzare@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Merge tag 'pull-qapi-2023-07-26-v2' of https://repo.or.cz/qemu/armbru into staging
QAPI patches patches for 2023-07-26
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# gpg: Good signature from "Markus Armbruster <armbru@redhat.com>" [undefined]
# gpg: aka "Markus Armbruster <armbru@pond.sub.org>" [undefined]
# gpg: WARNING: This key is not certified with a trusted signature!
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* tag 'pull-qapi-2023-07-26-v2' of https://repo.or.cz/qemu/armbru:
qapi: Reformat recent doc comments to conform to current conventions
qapi/trace: Tidy up trace-event-get-state, -set-state documentation
qapi/qdev: Tidy up device_add documentation
qapi/block: Tidy up block-latency-histogram-set documentation
qapi/block-core: Tidy up BlockLatencyHistogramInfo documentation
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Merge tag 'migration-20230726-pull-request' of https://gitlab.com/juan.quintela/qemu into staging
Migration Pull request
Hi
This is the migration PULL request. It is the same than yesterday with proper PULL headers.
It pass CI. It contains:
- Fabiano rosas trheadinfo cleanups
- Hyman Huang dirtylimit changes
- Part of my changes
- Peter Xu documentation
- Tejus updato to migration descriptions
- Wei want improvements for postocpy and multifd setup
Please apply.
Thanks, Juan.
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* tag 'migration-20230726-pull-request' of https://gitlab.com/juan.quintela/qemu: (25 commits)
migration/rdma: Split qemu_fopen_rdma() into input/output functions
qemu-file: Make qemu_file_get_error_obj() static
qemu-file: Simplify qemu_file_shutdown()
qemu_file: Make qemu_file_is_writable() static
migration: Change qemu_file_transferred to noflush
qemu-file: Rename qemu_file_transferred_ fast -> noflush
qtest/migration-tests.c: use "-incoming defer" for postcopy tests
migration: enforce multifd and postcopy preempt to be set before incoming
migration: Update error description whenever migration fails
docs/migration: Update postcopy bits
migration: skipped field is really obsolete.
migration-test: machine_opts is really arch specific
migration-test: Create arch_opts
migration-test: Make machine_opts regular with other options
migration-test: Be consistent for ppc
migration: Extend query-migrate to provide dirty page limit info
migration: Implement dirty-limit convergence algo
migration: Put the detection logic before auto-converge checking
migration: Refactor auto-converge capability logic
migration: Introduce dirty-limit capability
...
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
qapi: Reformat recent doc comments to conform to current conventions
Since commit a937b6aa739 (qapi: Reformat doc comments to conform to
current conventions), a number of comments not conforming to the
current formatting conventions were added. No problem, just sweep
the entire documentation once more.
To check the generated documentation does not change, I compared the
generated HTML before and after this commit with "wdiff -3". Finds no
differences. Comparing with diff is not useful, as the reflown
paragraphs are visible there.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-ID: <20230720071610.1096458-7-armbru@redhat.com>
qapi/trace: Tidy up trace-event-get-state, -set-state documentation
trace-event-set-state's explanation of how events are selected is
under "Features". Doesn't belong there. Simply delete it, as it
feels redundant with documentation of member @name.
trace-event-get-state's explanation is under "Returns". Tolerable,
but similarly redundant. Delete it, too.
Cc: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-ID: <20230720071610.1096458-5-armbru@redhat.com>
1. For detailed information about this command, please refer to the
‘docs/qdev-device-use.txt’ file.
2. It’s possible to list device properties by running QEMU with the
“-device DEVICE,help” command-line argument, where DEVICE is the
device’s name
The first item isn't numbered. Fix that:
1. Additional arguments depend on the type.
2. For detailed information about this command, please refer to the
‘docs/qdev-device-use.txt’ file.
3. It’s possible to list device properties by running QEMU with the
“-device DEVICE,help” command-line argument, where DEVICE is the
device’s name
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-ID: <20230720071610.1096458-4-armbru@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
qapi/block: Tidy up block-latency-histogram-set documentation
Examples come out like
Example
set new histograms for all io types with intervals [0, 10), [10,
50), [50, 100), [100, +inf):
The sentence "set new histograms ..." starts with a lower case letter.
Capitalize it. Same for the other examples.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-ID: <20230720071610.1096458-3-armbru@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
qapi/block-core: Tidy up BlockLatencyHistogramInfo documentation
Documentation for member @bin comes out like
list of io request counts corresponding to histogram intervals.
len("bins") = len("boundaries") + 1 For the example above, "bins"
may be something like [3, 1, 5, 2], and corresponding histogram
looks like:
Note how the equation and the sentence following it run together.
Replace the equation:
list of io request counts corresponding to histogram intervals,
one more element than "boundaries" has. For the example above,
"bins" may be something like [3, 1, 5, 2], and corresponding
histogram looks like:
Cc: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru> Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-ID: <20230720071610.1096458-2-armbru@redhat.com>
[Off by one fixed]
Juan Quintela [Tue, 30 May 2023 18:39:39 +0000 (20:39 +0200)]
qemu_file: Make qemu_file_is_writable() static
It is not used outside of qemu_file, and it shouldn't.
Signed-off-by: Juan Quintela <quintela@redhat.com>
Message-ID: <20230530183941.7223-19-quintela@redhat.com> Signed-off-by: Juan Quintela <quintela@redhat.com>
Juan Quintela [Tue, 30 May 2023 18:39:23 +0000 (20:39 +0200)]
migration: Change qemu_file_transferred to noflush
We do a qemu_fclose() just after that, that also does a qemu_fflush(),
so remove one qemu_fflush().
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <20230530183941.7223-3-quintela@redhat.com> Signed-off-by: Juan Quintela <quintela@redhat.com>
Juan Quintela [Tue, 30 May 2023 18:39:22 +0000 (20:39 +0200)]
qemu-file: Rename qemu_file_transferred_ fast -> noflush
Fast don't say much. Noflush indicates more clearly that it is like
qemu_file_transferred but without the flush.
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <20230530183941.7223-2-quintela@redhat.com> Signed-off-by: Juan Quintela <quintela@redhat.com>
Wei Wang [Tue, 6 Jun 2023 10:19:10 +0000 (18:19 +0800)]
qtest/migration-tests.c: use "-incoming defer" for postcopy tests
The Postcopy preempt capability is expected to be set before incoming
starts, so change the postcopy tests to start with deferred incoming and
call migrate-incoming after the cap has been set.
Why the existing tests (without this patch) didn't fail?
There could be two reasons:
1) "backlog" specifies the number of pending connections. As long as the
server accepts the connections faster than the clients side connecting,
connection will succeed. For the preempt test, it uses only 2 channels,
so very likely to not have pending connections.
2) per my tests (on kernel 6.2), the number of pending connections allowed
is actually "backlog + 1", which is 2 in this case.
That said, the implementation of socket_start_incoming_migration_internal
expects "migrate defer" to be used, and for safety, change the test to
work with the expected usage.
Signed-off-by: Wei Wang <wei.w.wang@intel.com> Reviewed-by: Peter Xu <peterx@redhat.com> Reviewed-by: Juan Quintela <quintela@redhat.com>
Message-ID: <20230606101910.20456-3-wei.w.wang@intel.com> Signed-off-by: Juan Quintela <quintela@redhat.com>
Wei Wang [Tue, 6 Jun 2023 10:19:09 +0000 (18:19 +0800)]
migration: enforce multifd and postcopy preempt to be set before incoming
qemu_start_incoming_migration needs to check the number of multifd
channels or postcopy ram channels to configure the backlog parameter (i.e.
the maximum length to which the queue of pending connections for sockfd
may grow) of listen(). So enforce the usage of postcopy-preempt and
multifd as below:
- need to use "-incoming defer" on the destination; and
- set_capability and set_parameter need to be done before migrate_incoming
Otherwise, disable the use of the features and report error messages to
remind users to adjust the commands.
Signed-off-by: Wei Wang <wei.w.wang@intel.com> Reviewed-by: Peter Xu <peterx@redhat.com> Reviewed-by: Juan Quintela <quintela@redhat.com>
Message-ID: <20230606101910.20456-2-wei.w.wang@intel.com> Signed-off-by: Juan Quintela <quintela@redhat.com> Acked-by: Juan Quintela <quintela@redhat.com>
There are places in migration.c where the migration is marked failed with
MIGRATION_STATUS_FAILED, but the failure reason is never updated. Hence
libvirt doesn't know why the migration failed when it queries for it.
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com Reviewed-by: Juan Quintela <quintela@redhat.com> Signed-off-by: Tejus GK <tejus.gk@nutanix.com>
Message-ID: <20230621130940.178659-2-tejus.gk@nutanix.com> Signed-off-by: Juan Quintela <quintela@redhat.com>
Peter Xu [Thu, 6 Jul 2023 11:56:11 +0000 (07:56 -0400)]
docs/migration: Update postcopy bits
We have postcopy recovery but not reflected in the document, do an update
for that.
Add a very small section on postcopy preempt.
Touch up the pagemap section, dropping the unsent map because it's already
been dropped in the source code in commit 1e7cf8c323 ("migration/postcopy:
unsentmap is not necessary for postcopy").
Touch up the postcopy section to remove "network connection" failures as
downside, because now it's not fatal and can be recovered. Suggested by
Laszlo.
Acked-by: Laszlo Ersek <lersek@redhat.com> Signed-off-by: Peter Xu <peterx@redhat.com> Reviewed-by: Juan Quintela <quintela@redhat.com>
Message-ID: <20230706115611.371048-1-peterx@redhat.com> Signed-off-by: Juan Quintela <quintela@redhat.com>
during bulk stage of ram migration if a page is a
zero page do not send it at all.
the memory at the destination reads as zero anyway.
even if there is an madvise with QEMU_MADV_DONTNEED
at the target upon receipt of a zero page I have observed
that the target starts swapping if the memory is overcommitted.
it seems that the pages are dropped asynchronously.
this patch also updates QMP to return the number of
skipped pages in MigrationStats.
Revert "migration: do not sent zero pages in bulk stage"
Not sending zero pages breaks migration if a page is zero
at the source but not at the destination. This can e.g. happen
if different BIOS versions are used at source and destination.
It has also been reported that migration on pseries is completely
broken with this patch.
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Message-ID: <20230612193344.3796-2-quintela@redhat.com> Signed-off-by: Juan Quintela <quintela@redhat.com>
Hyman Huang(黄勇) [Wed, 7 Jun 2023 16:21:58 +0000 (00:21 +0800)]
migration: Extend query-migrate to provide dirty page limit info
Extend query-migrate to provide throttle time and estimated
ring full time with dirty-limit capability enabled, through which
we can observe if dirty limit take effect during live migration.
Signed-off-by: Hyman Huang(黄勇) <yong.huang@smartx.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Juan Quintela <quintela@redhat.com>
Message-ID: <168733225273.5845.15871826788879741674-8@git.sr.ht> Signed-off-by: Juan Quintela <quintela@redhat.com>
Hyman Huang(黄勇) [Wed, 7 Jun 2023 16:12:40 +0000 (00:12 +0800)]
migration: Implement dirty-limit convergence algo
Implement dirty-limit convergence algo for live migration,
which is kind of like auto-converge algo but using dirty-limit
instead of cpu throttle to make migration convergent.
Enable dirty page limit if dirty_rate_high_cnt greater than 2
when dirty-limit capability enabled, Disable dirty-limit if
migration be canceled.
Note that "set_vcpu_dirty_limit", "cancel_vcpu_dirty_limit"
commands are not allowed during dirty-limit live migration.
Signed-off-by: Hyman Huang(黄勇) <yong.huang@smartx.com> Reviewed-by: Markus Armbruster <armbru@redhat.com>
Message-ID: <168733225273.5845.15871826788879741674-7@git.sr.ht> Reviewed-by: Juan Quintela <quintela@redhat.com> Signed-off-by: Juan Quintela <quintela@redhat.com>
Hyman Huang(黄勇) [Thu, 15 Jun 2023 13:29:44 +0000 (21:29 +0800)]
migration: Put the detection logic before auto-converge checking
This commit is prepared for the implementation of dirty-limit
convergence algo.
The detection logic of throttling condition can apply to both
auto-converge and dirty-limit algo, putting it's position
before the checking logic for auto-converge feature.
Signed-off-by: Hyman Huang(黄勇) <yong.huang@smartx.com> Reviewed-by: Juan Quintela <quintela@redhat.com>
Message-ID: <168733225273.5845.15871826788879741674-6@git.sr.ht> Signed-off-by: Juan Quintela <quintela@redhat.com>
Check if block migration is running before throttling
guest down in auto-converge way.
Note that this modification is kind of like code clean,
because block migration does not depend on auto-converge
capability, so the order of checks can be adjusted.
Signed-off-by: Hyman Huang(黄勇) <yong.huang@smartx.com> Acked-by: Peter Xu <peterx@redhat.com> Reviewed-by: Juan Quintela <quintela@redhat.com>
Message-Id: <168618975839.6361.17407633874747688653-5@git.sr.ht> Signed-off-by: Juan Quintela <quintela@redhat.com>
Hyman Huang(黄勇) [Wed, 7 Jun 2023 15:30:50 +0000 (23:30 +0800)]
migration: Introduce dirty-limit capability
Introduce migration dirty-limit capability, which can
be turned on before live migration and limit dirty
page rate durty live migration.
Introduce migrate_dirty_limit function to help check
if dirty-limit capability enabled during live migration.
Meanwhile, refactor vcpu_dirty_rate_stat_collect
so that period can be configured instead of hardcoded.
dirty-limit capability is kind of like auto-converge
but using dirty limit instead of traditional cpu-throttle
to throttle guest down. To enable this feature, turn on
the dirty-limit capability before live migration using
migrate-set-capabilities, and set the parameters
"x-vcpu-dirty-limit-period", "vcpu-dirty-limit" suitably
to speed up convergence.
Signed-off-by: Hyman Huang(黄勇) <yong.huang@smartx.com> Acked-by: Peter Xu <peterx@redhat.com> Reviewed-by: Juan Quintela <quintela@redhat.com>
Message-Id: <168618975839.6361.17407633874747688653-4@git.sr.ht> Signed-off-by: Juan Quintela <quintela@redhat.com>
Introduce "vcpu-dirty-limit" migration parameter used
to limit dirty page rate during live migration.
"vcpu-dirty-limit" and "x-vcpu-dirty-limit-period" are
two dirty-limit-related migration parameters, which can
be set before and during live migration by qmp
migrate-set-parameters.
This two parameters are used to help implement the dirty
page rate limit algo of migration.
Signed-off-by: Hyman Huang(黄勇) <yong.huang@smartx.com> Acked-by: Peter Xu <peterx@redhat.com> Reviewed-by: Juan Quintela <quintela@redhat.com>
Message-Id: <168618975839.6361.17407633874747688653-3@git.sr.ht> Signed-off-by: Juan Quintela <quintela@redhat.com>
Introduce "x-vcpu-dirty-limit-period" migration experimental
parameter, which is in the range of 1 to 1000ms and used to
make dirtyrate calculation period configurable.
Currently with the "x-vcpu-dirty-limit-period" varies, the
total time of live migration changes, test results show the
optimal value of "x-vcpu-dirty-limit-period" ranges from
500ms to 1000 ms. "x-vcpu-dirty-limit-period" should be made
stable once it proves best value can not be determined with
developer's experiments.
Signed-off-by: Hyman Huang(黄勇) <yong.huang@smartx.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Juan Quintela <quintela@redhat.com>
Message-Id: <168618975839.6361.17407633874747688653-2@git.sr.ht> Signed-off-by: Juan Quintela <quintela@redhat.com>
Fabiano Rosas [Wed, 7 Jun 2023 16:13:05 +0000 (13:13 -0300)]
migration/multifd: Protect accesses to migration_threads
This doubly linked list is common for all the multifd and migration
threads so we need to avoid concurrent access.
Add a mutex to protect the data from concurrent access. This fixes a
crash when removing two MigrationThread objects from the list at the
same time during cleanup of multifd threads.
Fixes: 671326201d ("migration: Introduce interface query-migrationthreads") Signed-off-by: Fabiano Rosas <farosas@suse.de> Reviewed-by: Peter Xu <peterx@redhat.com> Reviewed-by: Juan Quintela <quintela@redhat.com>
Message-Id: <20230607161306.31425-3-farosas@suse.de> Signed-off-by: Juan Quintela <quintela@redhat.com>
Until libblkio 1.3.0, virtio-blk drivers had completion eventfd
notifications enabled from the start, but from the next releases
this is no longer the case, so we have to explicitly enable them.
In fact, the libblkio documentation says they could be disabled,
so we should always enable them at the start if we want to be
sure to get completion eventfd notifications:
By default, the driver might not generate completion events for
requests so it is necessary to explicitly enable the completion
file descriptor before use:
Apache license is considered by some to be not compatible
with GPLv2+. Since QEMU as combined work is GPLv2-only,
these two files should be made compatible.
Reported-by: "Daniel P. Berrangé" <berrange@redhat.com> Link: https://lore.kernel.org/qemu-devel/ZEpKXncC%2Fe6FKRe9@redhat.com/ Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Acked-By: canokeys.org (http://canokeys.org) <contact@canokeys.org> Acked-by: YuanYang Meng <mkfssion@mkfssion.com> Signed-off-by: Hongren (Zenithal) Zheng <i@zenithal.me> Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Akihiko Odaki [Mon, 22 May 2023 11:47:37 +0000 (20:47 +0900)]
crypto: Always initialize splitkeylen
When _FORTIFY_SOURCE=2, glibc version is 2.35, and GCC version is
12.1.0, the compiler complains as follows:
In file included from /usr/include/string.h:535,
from /home/alarm/q/var/qemu/include/qemu/osdep.h:99,
from ../crypto/block-luks.c:21:
In function 'memset',
inlined from 'qcrypto_block_luks_store_key' at ../crypto/block-luks.c:843:9:
/usr/include/bits/string_fortified.h:59:10: error: 'splitkeylen' may be used uninitialized [-Werror=maybe-uninitialized]
59 | return __builtin___memset_chk (__dest, __ch, __len,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
60 | __glibc_objsize0 (__dest));
| ~~~~~~~~~~~~~~~~~~~~~~~~~~
../crypto/block-luks.c: In function 'qcrypto_block_luks_store_key':
../crypto/block-luks.c:699:12: note: 'splitkeylen' was declared here
699 | size_t splitkeylen;
| ^~~~~~~~~~~
It seems the compiler cannot see that splitkeylen will not be used
when splitkey is NULL. Suppress the warning by initializing splitkeylen
even when splitkey stays NULL.
Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com> Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
* tag 'pull-trivial-patches' of https://gitlab.com/mjt0k/qemu:
qapi: Correct "eg." to "e.g." in documentation
hw/pci: add comment to explain checking for available function 0 in pci hotplug
target/tricore: Rename tricore_feature
hw/9pfs: spelling fixes
other architectures: spelling fixes
arm: spelling fixes
s390x: spelling fixes
migration: spelling fixes
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Peter Maydell [Tue, 25 Jul 2023 15:30:39 +0000 (16:30 +0100)]
Merge tag 'misc-fixes-20230725' of https://github.com/philmd/qemu into staging
Misc patches queue
hw/sd/sdhci: Default I/O ops to little endian
hw/mips/loongson3-virt: Only use default USB if available
hw/char/escc: Implement loopback mode to allow self-testing
target/mips: Avoid overruns and shifts by negative number
target/sparc: Handle FPRS correctly on big-endian hosts
target/tricore: Rename tricore_feature to avoid clash with libcapstone
* tag 'misc-fixes-20230725' of https://github.com/philmd/qemu:
target/tricore: Rename tricore_feature
target/sparc: Handle FPRS correctly on big-endian hosts
target/mips: Avoid shift by negative number in page_table_walk_refill()
target/mips: Pass directory/leaf shift values to walk_directory()
target/mips/mxu: Avoid overrun in gen_mxu_q8adde()
target/mips/mxu: Avoid overrun in gen_mxu_S32SLT()
target/mips/mxu: Replace magic array size by its definition
hw/char/escc: Implement loopback mode
hw/mips: Improve the default USB settings in the loongson3-virt machine
hw/sd/sdhci: Do not force sdhci_mmio_*_ops onto all SD controllers
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
this name is used by capstone and will lead to a build failure of QEMU,
when capstone is enabled. So we rename it to tricore_has_feature(), to
match has_feature() in translate.c.
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/1774 Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de> Reviewed-by: Thomas Huth <thuth@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
this name is used by capstone and will lead to a build failure of QEMU,
when capstone is enabled. So we rename it to tricore_has_feature(), to
match has_feature() in translate.c.
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/1774 Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20230721060605.76636-1-kbastian@mail.uni-paderborn.de>
Peter Maydell [Mon, 17 Jul 2023 10:35:44 +0000 (11:35 +0100)]
target/sparc: Handle FPRS correctly on big-endian hosts
In CPUSparcState we define the fprs field as uint64_t. However we
then refer to it in translate.c via a TCGv_i32 which we set up with
tcg_global_mem_new_ptr(). This means that on a big-endian host when
the guest does something to writo te the FPRS register this value
ends up in the wrong half of the uint64_t, and the QEMU C code that
refers to env->fprs sees the wrong value. The effect of this is that
guest code that enables the FPU crashes with spurious FPU Disabled
exceptions. In particular, this is why
tests/avocado/machine_sparc64_sun4u.py:Sun4uMachine.test_sparc64_sun4u
times out on an s390 host.
There are multiple ways we could fix this; since there are actually
only three bits in the FPRS register and the code in translate.c
would be a bit painful to convert to dealing with a TCGv_i64, change
the type of the CPU state struct field to match what translate.c is
expecting.
(None of the other fields referenced by the r32[] array in
sparc_tcg_init() have the wrong type.)
Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Message-Id: <20230717103544.637453-1-peter.maydell@linaro.org>
Peter Maydell [Mon, 17 Jul 2023 16:29:40 +0000 (18:29 +0200)]
target/mips: Avoid shift by negative number in page_table_walk_refill()
Coverity points out that in page_table_walk_refill() we can
shift by a negative number, which is undefined behaviour
(CID 1452918, 1452920, 1452922). We already catch the
negative directory_shift and leaf_shift as being a "bail
out early" case, but not until we've already used them to
calculated some offset values.
The shifts can be negative only if ptew > 1, so make the
bail-out-early check look directly at that, and only
calculate the shift amounts and the offsets based on them
after we have done that check. This allows
us to simplify the expressions used to calculate the
shift amounts, use an unsigned type, and avoids the
undefined behaviour.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
[PMD: Check for ptew > 1, use unsigned type] Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-Id: <20230717213504.24777-3-philmd@linaro.org>
target/mips: Pass directory/leaf shift values to walk_directory()
We already evaluated directory_shift and leaf_shift in
page_table_walk_refill(), no need to do that again: pass
as argument.
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-Id: <20230717213504.24777-2-philmd@linaro.org>
target/mips/mxu: Avoid overrun in gen_mxu_q8adde()
Coverity reports a potential overruns (CID 1517770):
Overrunning array "mxu_gpr" of 15 8-byte elements at
element index 4294967295 (byte offset 34359738367)
using index "XRb - 1U" (which evaluates to 4294967295).
Add a gen_extract_mxu_gpr() helper similar to
gen_load_mxu_gpr() to safely extract MXU registers.
Fixes: eb79951ab6 ("target/mips/mxu: Add Q8ADDE ... insns") Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230712060806.82323-4-philmd@linaro.org>
target/mips/mxu: Avoid overrun in gen_mxu_S32SLT()
Coverity reports a potential overrun (CID 1517769):
Overrunning array "mxu_gpr" of 15 8-byte elements at
element index 4294967295 (byte offset 34359738367)
using index "XRb - 1U" (which evaluates to 4294967295).
Use gen_load_mxu_gpr() to safely load MXU registers.
Fixes: ff7936f009 ("target/mips/mxu: Add S32SLT ... insns") Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230712060806.82323-3-philmd@linaro.org>
target/mips/mxu: Replace magic array size by its definition
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230712060806.82323-2-philmd@linaro.org>
Thomas Huth [Sun, 16 Jul 2023 15:35:19 +0000 (17:35 +0200)]
hw/char/escc: Implement loopback mode
The firmware of the m68k next-cube machine uses the loopback mode
for self-testing the hardware and currently fails during this step.
By implementing the loopback mode, we can make the firmware pass
to the next step.
Signed-off-by: Thomas Huth <huth@tuxfamily.org> Reviewed-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-Id: <20230716153519.31722-1-huth@tuxfamily.org>
Thomas Huth [Fri, 14 Jul 2023 10:49:03 +0000 (12:49 +0200)]
hw/mips: Improve the default USB settings in the loongson3-virt machine
It's possible to compile QEMU without the USB devices (e.g. when using
"--without-default-devices" as option for the "configure" script).
To be still able to run the loongson3-virt machine in default mode with
such a QEMU binary, we have to check here for the availability of the
OHCI controller first before instantiating the USB devices.
Signed-off-by: Thomas Huth <thuth@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-Id: <20230714104903.284845-1-thuth@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
hw/sd/sdhci: Do not force sdhci_mmio_*_ops onto all SD controllers
Since commit c0a55a0c9da2 "hw/sd/sdhci: Support big endian SD host controller
interfaces" sdhci_common_realize() forces all SD card controllers to use either
sdhci_mmio_le_ops or sdhci_mmio_be_ops, depending on the "endianness" property.
However, there are device models which use different MMIO ops: TYPE_IMX_USDHC
uses usdhc_mmio_ops and TYPE_S3C_SDHCI uses sdhci_s3c_mmio_ops.
Forcing sdhci_mmio_le_ops breaks SD card handling on the "sabrelite" board, for
example. Fix this by defaulting the io_ops to little endian and switch to big
endian in sdhci_common_realize() only if there is a matchig big endian variant
available.
Fixes: c0a55a0c9da2 ("hw/sd/sdhci: Support big endian SD host controller
interfaces")
Signed-off-by: Bernhard Beschow <shentey@gmail.com> Tested-by: Guenter Roeck <linux@roeck-us.net>
Message-Id: <20230709080950.92489-1-shentey@gmail.com>
Peter Maydell [Tue, 25 Jul 2023 11:44:39 +0000 (12:44 +0100)]
Merge tag 'pull-target-arm-20230725' of https://git.linaro.org/people/pmaydell/qemu-arm into staging
target-arm queue:
* tests/decode: Suppress "error: " string for expected-failure tests
* ui/curses: For curses display, recognize a few more control keys
* target/arm: Special case M-profile in debug_helper.c code
* scripts/git-submodule.sh: Don't rely on non-POSIX 'read' behaviour
* hw/arm/smmu: Handle big-endian hosts correctly
* tag 'pull-target-arm-20230725' of https://git.linaro.org/people/pmaydell/qemu-arm:
tests/decode: Suppress "error: " string for expected-failure tests
For curses display, recognize a few more control keys
target/arm: Special case M-profile in debug_helper.c code
scripts/git-submodule.sh: Don't rely on non-POSIX 'read' behaviour
hw/arm/smmu: Handle big-endian hosts correctly
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This then produces false positives when scanning the
logfiles for strings like "error: ".
For the expected-failure tests, make decodetree print
"detected:" instead of "error:".
Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20230720131521.1325905-1-peter.maydell@linaro.org
Sean Estabrooks [Tue, 25 Jul 2023 09:56:51 +0000 (10:56 +0100)]
For curses display, recognize a few more control keys
The curses display handles most control-X keys, and translates
them into their corresponding keycode. Here we recognize
a few that are missing, Ctrl-@ (null), Ctrl-\ (backslash),
Ctrl-] (right bracket), Ctrl-^ (caret), Ctrl-_ (underscore).
Signed-off-by: Sean Estabrooks <sean.estabrooks@gmail.com>
Message-id: CAHyVn3Bh9CRgDuOmf7G7Ngwamu8d4cVozAcB2i4ymnnggBXNmg@mail.gmail.com Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Peter Maydell [Tue, 25 Jul 2023 09:56:51 +0000 (10:56 +0100)]
target/arm: Special case M-profile in debug_helper.c code
A lot of the code called from helper_exception_bkpt_insn() is written
assuming A-profile, but we will also call this helper on M-profile
CPUs when they execute a BKPT insn. This used to work by accident,
but recent changes mean that we will hit an assert when some of this
code calls down into lower level functions that end up calling
arm_security_space_below_el3(), arm_el_is_aa64(), and other functions
that now explicitly assert that the guest CPU is not M-profile.
Handle M-profile directly to avoid the assertions:
* in arm_debug_target_el(), M-profile debug exceptions always
go to EL1
* in arm_debug_exception_fsr(), M-profile always uses the short
format FSR (compare commit d7fe699be54b2, though in this case
the code in arm_v7m_cpu_do_interrupt() does not need to
look at the FSR value at all)
Cc: qemu-stable@nongnu.org
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/1775 Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20230721143239.1753066-1-peter.maydell@linaro.org
Peter Maydell [Tue, 25 Jul 2023 09:56:51 +0000 (10:56 +0100)]
scripts/git-submodule.sh: Don't rely on non-POSIX 'read' behaviour
The POSIX definition of the 'read' utility requires that you
specify the variable name to set; omitting the name and
having it default to 'REPLY' is a bashism. If your system
sh is dash, then it will print an error message during build:
Fixes: fdb8fd8cb915647b ("git-submodule: allow partial update of .git-submodule-status") Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-id: 20230720153038.1587196-1-peter.maydell@linaro.org
Peter Maydell [Tue, 25 Jul 2023 09:56:51 +0000 (10:56 +0100)]
hw/arm/smmu: Handle big-endian hosts correctly
The implementation of the SMMUv3 has multiple places where it reads a
data structure from the guest and directly operates on it without
doing a guest-to-host endianness conversion. Since all SMMU data
structures are little-endian, this means that the SMMU doesn't work
on a big-endian host. In particular, this causes the Avocado test
machine_aarch64_virt.py:Aarch64VirtMachine.test_alpine_virt_tcg_gic_max
to fail on an s390x host.
Add appropriate byte-swapping on reads and writes of guest in-memory
data structures so that the device works correctly on big-endian
hosts.
As part of this we constrain queue_read() to operate only on Cmd
structs and queue_write() on Evt structs, because in practice these
are the only data structures the two functions are used with, and we
need to know what the data structure is to be able to byte-swap its
parts correctly.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Tested-by: Thomas Huth <thuth@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Eric Auger <eric.auger@redhat.com>
Message-id: 20230717132641.764660-1-peter.maydell@linaro.org Cc: qemu-stable@nongnu.org
* tag 'pull-request-2023-07-24' of https://gitlab.com/thuth/qemu:
tests/avocado/machine_s390_ccw_virtio: Skip the flaky virtio-gpu test by default
target/loongarch: Fix the CSRRD CPUID instruction on big endian hosts
tests/avocado/migration: Remove the malfunctioning s390x tests
tests/tcg/s390x: Test VCKSM
tests/tcg/s390x: Test STPQ
tests/tcg/s390x: Test MC
tests/tcg/s390x: Test ICM
tests/tcg/s390x: Test CLM
tests/tcg/s390x: Test CLGEBR and CGEBRA
tests/tcg/s390x: Test CKSM
target/s390x: Fix assertion failure in VFMIN/VFMAX with type 13
target/s390x: Make MC raise specification exception when class >= 16
target/s390x: Fix ICM with M3=0
target/s390x: Fix CONVERT TO LOGICAL/FIXED with out-of-range inputs
target/s390x: Fix CLM with M3=0
target/s390x: Make CKSM raise an exception if R2 is odd
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
* tag 'pull-qapi-2023-07-10' of https://repo.or.cz/qemu/armbru:
migration.json: Don't use space before colon
qapi: better docs for calc-dirty-rate and friends
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Thomas Huth [Mon, 24 Jul 2023 08:48:51 +0000 (10:48 +0200)]
tests/avocado/machine_s390_ccw_virtio: Skip the flaky virtio-gpu test by default
The virtio-gpu test is known to be flaky - that's why we also did
not enable the test_s390x_fedora in the gitlab CI. However, a flaky
test can also be annoying when testing locally, so let's rather skip
this subtest by default and start running the test_s390x_fedora test
in the gitlab CI again (since the other things that are tested here
are quite valuable).
Message-Id: <20230724084851.24251-1-thuth@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Cédric Le Goater <clg@redhat.com> Signed-off-by: Thomas Huth <thuth@redhat.com>
Thomas Huth [Thu, 20 Jul 2023 17:53:07 +0000 (19:53 +0200)]
target/loongarch: Fix the CSRRD CPUID instruction on big endian hosts
The test in tests/avocado/machine_loongarch.py is currently failing
on big endian hosts like s390x. By comparing the traces between running
the QEMU_EFI.fd bios on a s390x and on a x86 host, it's quickly obvious
that the CSRRD instruction for the CPUID is behaving differently. And
indeed: The code currently does a long read (i.e. 64 bit) from the
address that points to the CPUState->cpu_index field (with tcg_gen_ld_tl()
in the trans_csrrd() function). But this cpu_index field is only an "int"
(i.e. 32 bit). While this dirty pointer magic works on little endian hosts,
it of course fails on big endian hosts. Fix it by using a proper helper
function instead.
Message-Id: <20230720175307.854460-1-thuth@redhat.com> Reviewed-by: Song Gao <gaosong@loongson.cn> Signed-off-by: Thomas Huth <thuth@redhat.com>
Thomas Huth [Fri, 21 Jul 2023 16:43:46 +0000 (18:43 +0200)]
tests/avocado/migration: Remove the malfunctioning s390x tests
The tests from tests/avocado/migration.py do not work at all
on s390x - the bios shuts down immediately when it cannot find
a boot disk, so there is nothing left to migrate here. For doing
a proper migration test, we would need a proper payload, but we
already do such tests in the migration *qtest*, so it is unnecessary
to redo such a test here, thus let's simply remove this test.
Message-Id: <20230721164346.10112-1-thuth@redhat.com> Reviewed-by: Juan Quintela <quintela@redhat.com> Signed-off-by: Thomas Huth <thuth@redhat.com>
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