Commit Graph

101479 Commits

Author SHA1 Message Date
Kevin Wolf
eeb4777544 block: Mark bdrv_co_do_pwrite_zeroes() GRAPH_RDLOCK
All callers are already GRAPH_RDLOCK, so just add the annotation and
remove assume_graph_lock().

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20230203152202.49054-14-kwolf@redhat.com>
Reviewed-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2023-02-23 19:49:19 +01:00
Kevin Wolf
b24a4c41ba block: Mark bdrv_co_pwrite_sync() and callers GRAPH_RDLOCK
This adds GRAPH_RDLOCK annotations to declare that callers of
bdrv_co_pwrite_sync() need to hold a reader lock for the graph.

For some places, we know that they will hold the lock, but we don't have
the GRAPH_RDLOCK annotations yet. In this case, add assume_graph_lock()
with a FIXME comment. These places will be removed once everything is
properly annotated.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20230203152202.49054-13-kwolf@redhat.com>
Reviewed-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2023-02-23 19:49:18 +01:00
Kevin Wolf
b9b10c35e5 block: Mark public read/write functions GRAPH_RDLOCK
This adds GRAPH_RDLOCK annotations to declare that callers of
bdrv_co_pread*/pwrite*() need to hold a reader lock for the graph.

For some places, we know that they will hold the lock, but we don't have
the GRAPH_RDLOCK annotations yet. In this case, add assume_graph_lock()
with a FIXME comment. These places will be removed once everything is
properly annotated.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20230203152202.49054-12-kwolf@redhat.com>
Reviewed-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2023-02-23 19:49:17 +01:00
Kevin Wolf
7b1fb72e2c block: Mark read/write in block/io.c GRAPH_RDLOCK
This adds GRAPH_RDLOCK annotations to declare that callers of
bdrv_driver_*() need to hold a reader lock for the graph. It doesn't add
the annotation to public functions yet.

For some places, we know that they will hold the lock, but we don't have
the GRAPH_RDLOCK annotations yet. In this case, add assume_graph_lock()
with a FIXME comment. These places will be removed once everything is
properly annotated.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20230203152202.49054-11-kwolf@redhat.com>
Reviewed-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2023-02-23 19:49:16 +01:00
Kevin Wolf
abaf8b750b block: Mark bdrv_co_pwrite_zeroes() and callers GRAPH_RDLOCK
This adds GRAPH_RDLOCK annotations to declare that callers of
bdrv_co_pwrite_zeroes() need to hold a reader lock for the graph.

For some places, we know that they will hold the lock, but we don't have
the GRAPH_RDLOCK annotations yet. In this case, add assume_graph_lock()
with a FIXME comment. These places will be removed once everything is
properly annotated.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20230203152202.49054-10-kwolf@redhat.com>
Reviewed-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2023-02-23 19:49:14 +01:00
Emanuele Giuseppe Esposito
9a5a1c621e block: Mark bdrv_co_pdiscard() and callers GRAPH_RDLOCK
This adds GRAPH_RDLOCK annotations to declare that callers of
bdrv_co_pdiscard() need to hold a reader lock for the graph.

For some places, we know that they will hold the lock, but we don't have
the GRAPH_RDLOCK annotations yet. In this case, add assume_graph_lock()
with a FIXME comment. These places will be removed once everything is
properly annotated.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20230203152202.49054-9-kwolf@redhat.com>
Reviewed-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2023-02-23 19:49:13 +01:00
Emanuele Giuseppe Esposito
8809534933 block: Mark bdrv_co_flush() and callers GRAPH_RDLOCK
This adds GRAPH_RDLOCK annotations to declare that callers of
bdrv_co_flush() need to hold a reader lock for the graph.

For some places, we know that they will hold the lock, but we don't have
the GRAPH_RDLOCK annotations yet. In this case, add assume_graph_lock()
with a FIXME comment. These places will be removed once everything is
properly annotated.

Signed-off-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20230203152202.49054-8-kwolf@redhat.com>
Reviewed-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2023-02-23 19:49:12 +01:00
Emanuele Giuseppe Esposito
c16b8bd4e5 block/qed: add missing graph rdlock in qed_need_check_timer_entry
This function is called in two different places:
- timer callback, which does not take the graph rdlock.
- bdrv_qed_drain_begin(), which is .bdrv_drain_begin()
  callback documented as function that does not take the lock.

Since it calls recursive functions that traverse the
graph, we need to protect them with the graph rdlock.

Signed-off-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20230203152202.49054-7-kwolf@redhat.com>
Reviewed-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2023-02-23 19:49:10 +01:00
Kevin Wolf
26c518ab1e block: Mark bdrv_co_ioctl() and callers GRAPH_RDLOCK
This adds GRAPH_RDLOCK annotations to declare that callers of
bdrv_co_ioctl() need to hold a reader lock for the graph.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20230203152202.49054-6-kwolf@redhat.com>
Reviewed-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2023-02-23 19:49:09 +01:00
Kevin Wolf
7ff9579e60 block: Mark bdrv_co_block_status() and callers GRAPH_RDLOCK
This adds GRAPH_RDLOCK annotations to declare that callers of
bdrv_co_block_status() need to hold a reader lock for the graph.

For some places, we know that they will hold the lock, but we don't have
the GRAPH_RDLOCK annotations yet. In this case, add assume_graph_lock()
with a FIXME comment. These places will be removed once everything is
properly annotated.

Signed-off-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20230203152202.49054-5-kwolf@redhat.com>
Reviewed-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2023-02-23 19:49:07 +01:00
Kevin Wolf
c2b8e31516 block: Mark bdrv_co_truncate() and callers GRAPH_RDLOCK
This adds GRAPH_RDLOCK annotations to declare that callers of
bdrv_co_truncate() need to hold a reader lock for the graph.

For some places, we know that they will hold the lock, but we don't have
the GRAPH_RDLOCK annotations yet. In this case, add assume_graph_lock()
with a FIXME comment. These places will be removed once everything is
properly annotated.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20230203152202.49054-4-kwolf@redhat.com>
Reviewed-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2023-02-23 19:49:03 +01:00
Kevin Wolf
32125b1460 mirror: Fix access of uninitialised fields during start
bdrv_mirror_top_pwritev() accesses the job object when active mirroring
is enabled. It disables this code during early initialisation while
s->job isn't set yet.

However, s->job is still set way too early when the job object isn't
fully initialised. For example, &s->ops_in_flight isn't initialised yet
and the in_flight bitmap doesn't exist yet. This causes crashes when a
write request comes in too early.

Move the assignment of s->job to when the mirror job is actually fully
initialised to make sure that the mirror_top driver doesn't access it
too early.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20230203152202.49054-3-kwolf@redhat.com>
Reviewed-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2023-02-23 19:48:57 +01:00
Kevin Wolf
10e5d70787 block: Make bdrv_can_set_read_only() static
It is never called outside of block.c.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20230203152202.49054-2-kwolf@redhat.com>
Reviewed-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2023-02-23 19:48:28 +01:00
Markus Armbruster
1178710247 rocker: Tweak stubbed out monitor commands' error messages
The QERR_ macros are leftovers from the days of "rich" error objects.
We've been trying to reduce their remaining use.

The stubbed out Rocker monitor commands are the last remaining users
of QERR_FEATURE_DISABLED.  They fail like this:

    (qemu) info rocker mumble
    Error: The feature 'rocker' is not enabled

The real rocker commands fail like this when the named object doesn't
exist:

    Error: rocker mumble not found

If that's good enough when Rocker is enabled, then it's good enough
when it's disabled, so replace QERR_FEATURE_DISABLED with that, and
drop the macro.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20230207075115.1525-13-armbru@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Juan Quintela <quintela@redhat.com>
2023-02-23 14:10:17 +01:00
Markus Armbruster
43aef7e632 migration/colo: Improve an x-colo-lost-heartbeat error message
The QERR_ macros are leftovers from the days of "rich" error objects.
We've been trying to reduce their remaining use.

Get rid of a use of QERR_FEATURE_DISABLED, and improve the somewhat
imprecise error message

    (qemu) x_colo_lost_heartbeat
    Error: The feature 'colo' is not enabled

to

    Error: VM is not in COLO mode

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20230207075115.1525-12-armbru@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Juan Quintela <quintela@redhat.com>
2023-02-23 14:10:17 +01:00
Markus Armbruster
0ac02656e2 hw/core: Improve the query-hotpluggable-cpus error message
The QERR_ macros are leftovers from the days of "rich" error objects.
We've been trying to reduce their remaining use.

Get rid of a use of QERR_FEATURE_DISABLED, and improve the slightly
awkward error message

    (qemu) info hotpluggable-cpus
    Error: The feature 'query-hotpluggable-cpus' is not enabled

to

    Error: machine does not support hot-plugging CPUs

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20230207075115.1525-11-armbru@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
2023-02-23 14:10:17 +01:00
Markus Armbruster
0ec8384f83 replay: Simplify setting replay blockers
replay_add_blocker() takes an Error *.  All callers pass one created
like this:

    error_setg(&blocker, QERR_REPLAY_NOT_SUPPORTED, "some feature");

Folding this into replay_add_blocker() simplifies the callers, losing
a bit of generality we haven't needed in more than six years.

Since there are no other uses of macro QERR_REPLAY_NOT_SUPPORTED,
replace the remaining one by its expansion, and drop the macro.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20230207075115.1525-10-armbru@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
2023-02-23 14:10:17 +01:00
Markus Armbruster
c40233593e qga: Drop dangling reference to QERR_QGA_LOGGING_DISABLED
slog()'s function comment advises to use QERR_QGA_LOGGING_DISABLED.
This macro never existed.  The reference got added in commit
e3d4d25206 "guest agent: add guest agent RPCs/commands" along with
QERR_QGA_LOGGING_FAILED, so maybe that one was meant.  However,
QERR_QGA_LOGGING_FAILED was never actually used, and was removed in
commit d73f0beadb "qerror.h: Remove unused error classes".

Drop the dangling reference.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20230207075115.1525-9-armbru@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Konstantin Kostiuk <kkostiuk@redhat.com>
2023-02-23 14:10:17 +01:00
Markus Armbruster
36ebc7db79 hw/acpi: Move QMP command to hw/core/
The QERR_ macros are leftovers from the days of "rich" error objects.
We've been trying to reduce their remaining use.

qmp_query_vm_generation_id() in stubs/vmgenid.c is the last user of
QERR_UNSUPPORTED outside qga/.  Unlike the stubs we just dropped, it
is actually reachable, namely when CONFIG_ACPI_VMGENID is off.  It
always fails like

    (qemu) info vm-generation-id
    Error: this feature or command is not currently supported

Turns out the real qmp_query_vm_generation_id() doesn't actually
depend on CONFIG_ACPI_VMGENID, and fails safely when it's off.  Move
it to hw/core/machine-qmp-cmds.c, and drop the stub.  The error
message becomes

    Error: VM Generation ID device not found

Feels like an improvement to me.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20230207075115.1525-8-armbru@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Juan Quintela <quintela@redhat.com>
2023-02-23 14:10:17 +01:00
Markus Armbruster
588c13fcb0 hw/acpi: Dumb down acpi_table_add() stub
The QERR_ macros are leftovers from the days of "rich" error objects.
We've been trying to reduce their remaining use.

acpi_table_add() is only ever called on behalf of CLI option
-acpitable.  Since qemu-options.hx sets @arch_mask to QEMU_ARCH_I386,
it is reachable only for these targets.  Since they provide a real
acpi_table_add(), the stub is unreachable.

There's no point in unreachable code keeping QERR_UNSUPPORTED alive.
Dumb it down to g_assert_not_reached().

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20230207075115.1525-7-armbru@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Juan Quintela <quintela@redhat.com>
2023-02-23 14:10:17 +01:00
Markus Armbruster
0ca6745c74 hw/smbios: Dumb down smbios_entry_add() stub
The QERR_ macros are leftovers from the days of "rich" error objects.
We've been trying to reduce their remaining use.

smbios_entry_add() is only ever called on behalf of CLI option
-smbios.  Since qemu-options.hx sets @arch_mask to QEMU_ARCH_I386 |
QEMU_ARCH_ARM, it is reachable only for these targets.  Since they
provide a real smbios_entry_add(), the stub is unreachable.

There's no point in unreachable code keeping QERR_UNSUPPORTED alive.
Dumb it down to g_assert_not_reached().

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20230207075115.1525-6-armbru@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Juan Quintela <quintela@redhat.com>
2023-02-23 14:10:17 +01:00
Markus Armbruster
a0d0267779 hw/core: Improve error message when machine doesn't provide NMIs
The QERR_ macros are leftovers from the days of "rich" error objects.
We've been trying to reduce their remaining use.

Get rid of a use of QERR_UNSUPPORTED, and improve the rather vague
error message

    (qemu) nmi
    Error: this feature or command is not currently supported

to

    Error: machine does not provide NMIs

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20230207075115.1525-5-armbru@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Juan Quintela <quintela@redhat.com>
2023-02-23 14:10:17 +01:00
Markus Armbruster
f1a4697c23 dump: Assert cpu_get_note_size() can't fail
The only way cpu_get_note_size() can return a negative value is
integer overflow in the non-stub versions, which is a programming
error.  The stub version is not actually reachable, because the
cpu_get_dump_info() stub will fail first.  Use assert().  This gets
rid of another use of QERR_UNSUPPORTED.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20230207075115.1525-4-armbru@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Juan Quintela <quintela@redhat.com>
2023-02-23 14:10:17 +01:00
Markus Armbruster
f969c627e3 dump: Improve error message when target doesn't support memory dump
The QERR_ macros are leftovers from the days of "rich" error objects.
We've been trying to reduce their remaining use.

Get rid of a use of QERR_UNSUPPORTED, and improve the rather vague
error message

    (qemu) dump-guest-memory mumble
    Error: this feature or command is not currently supported

to

    Error: dumping guest memory is not supported on this target

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20230207075115.1525-3-armbru@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Juan Quintela <quintela@redhat.com>
[Error message tweaked]
2023-02-23 14:00:32 +01:00
Markus Armbruster
6f1e91f716 error: Drop superfluous #include "qapi/qmp/qerror.h"
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20230207075115.1525-2-armbru@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Konstantin Kostiuk <kkostiuk@redhat.com>
2023-02-23 13:56:14 +01:00
John Snow
c7b7a7ded9 qapi: remove JSON value FIXME
With the two major JSON-ish type hierarchies clarified for distinct
purposes; QAPIExpression for parsed expressions and JSONValue for
introspection data, remove this FIXME as no longer an action item.

A third JSON-y data type, _ExprValue, is not meant to represent JSON in
the abstract but rather only the possible legal return values from a
single function, get_expr(). It isn't appropriate to attempt to merge it
with either of the above two types.

In theory, it may be possible to define a completely agnostic
one-size-fits-all JSON type hierarchy that any other user could borrow -
in practice, it's tough to wrangle the differences between invariant,
covariant and contravariant types: input and output parameters demand
different properties of such a structure.

However, QAPIExpression serves to authoritatively type user input to the
QAPI parser, while JSONValue serves to authoritatively type qapi
generator *output* to be served back to client users at runtime via
QMP. The AST for these two types are different and cannot be wholly
merged into a unified syntax.

They could, in theory, share some JSON primitive definitions. In
practice, this is currently more trouble than it's worth with mypy's
current expressive power. As such, declare this "done enough for now".

Signed-off-by: John Snow <jsnow@redhat.com>
Message-Id: <20230215000011.1725012-7-jsnow@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
2023-02-23 13:01:45 +01:00
John Snow
67a81f9fb7 qapi: remove _JSONObject
We can remove this alias as it only has two usages now, and no longer
pays for the confusion of "yet another type".

Signed-off-by: John Snow <jsnow@redhat.com>
Message-Id: <20230215000011.1725012-6-jsnow@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
2023-02-23 13:01:45 +01:00
John Snow
420110591c qapi/parser: add QAPIExpression type
This patch creates a new type, QAPIExpression, which represents a parsed
expression complete with QAPIDoc and QAPISourceInfo.

This patch turns parser.exprs into a list of QAPIExpression instead,
and adjusts expr.py to match.

This allows the types we specify in parser.py to be "remembered" all the
way through expr.py and into schema.py. Several assertions around
packing and unpacking this data can be removed as a result.

It also corrects a harmless typing error.  Before the patch,
check_exprs() allegedly takes a List[_JSONObject].  It actually takes
a list of dicts of the form

    {'expr': E, 'info': I, 'doc': D}

where E is of type _ExprValue, I is of type QAPISourceInfo, and D is
of type QAPIDoc.  Key 'doc' is optional.  This is not a _JSONObject!
Passes type checking anyway, because _JSONObject is Dict[str, object].

Signed-off-by: John Snow <jsnow@redhat.com>
Message-Id: <20230215000011.1725012-5-jsnow@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
[Commit message amended to point out the typing fix]
2023-02-23 13:01:45 +01:00
John Snow
c60caf8086 qapi: Add minor typing workaround for 3.6
Pylint under 3.6 does not believe that Collection is subscriptable at
runtime. It is, making this a Pylint
bug. https://github.com/PyCQA/pylint/issues/2377

They closed it as fixed, but that doesn't seem to be true as of Pylint
2.13.9, the latest version you can install under Python 3.6. 2.13.9 was
released 2022-05-13, about seven months after the bug was closed.

The least-annoying fix here is to just use the concret type.

Signed-off-by: John Snow <jsnow@redhat.com>
Message-Id: <20230215000011.1725012-4-jsnow@redhat.com>
[Dumbed down from Sequence[str] to List[str], commit message adjusted]
Reviewed-by: Markus Armbruster <armbru@redhat.com>
2023-02-23 13:01:14 +01:00
John Snow
885ecdbec9 qapi: update pylint configuration
Newer versions of pylint disable the "no-self-use" message by
default. Older versions don't, though. If we leave the suppressions in,
pylint yelps about useless options. Just tell pylint to shush.

Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20230215000011.1725012-3-jsnow@redhat.com>
2023-02-23 12:49:39 +01:00
John Snow
6f2ddcde77 qapi: Update flake8 config
New versions of flake8 don't like same-line comments. (It's a version
newer than what fc37 ships, but it still makes my life easier to fix it
now.)

Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20230215000011.1725012-2-jsnow@redhat.com>
2023-02-23 12:49:39 +01:00
Markus Armbruster
c2985e38f0 docs/devel/qapi-code-gen: Fix a missing 'may', clarify SchemaInfo
Documentation of enumeration value conditions lacks a 'may'.  Fix
that.

Clarify SchemaInfo documentation for struct and union types.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20230213132009.918801-3-armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>
2023-02-23 12:49:09 +01:00
Markus Armbruster
ebf1b324e8 docs/devel/qapi-code-gen: Belatedly update features documentation
Commit 013b4efc9b "qapi: Add feature flags to remaining
definitions" (v5.0.0), commit 84ab008687 "qapi: Add feature flags to
struct members" (v5.0.0), and commit b6c18755e4 "qapi: Add feature
flags to enum members" (v6.2.0) neglected to update section
"Features".  Make up for that.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20230213132009.918801-2-armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>
2023-02-23 12:48:39 +01:00
John Snow
6832189fd7 python: drop pipenv
The pipenv tool was nice in theory, but in practice it's just too hard
to update selectively, and it makes using it a pain. The qemu.qmp repo
dropped pipenv support a while back and it's been functioning just fine,
so I'm backporting that change here to qemu.git.

Signed-off-by: John Snow <jsnow@redhat.com>
Message-id: 20230210003147.1309376-3-jsnow@redhat.com
Signed-off-by: John Snow <jsnow@redhat.com>
2023-02-22 23:35:03 -05:00
John Snow
aef633e765 python: support pylint 2.16
Pylint 2.16 adds a few new checks that cause the optional check-tox CI
job to fail.

1. The superfluous-parens check seems to be a bit more aggressive,
2. broad-exception-raised is new; it discourages "raise Exception".

Fix these minor issues and turn the lights green.

Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Beraldo Leal <bleal@redhat.com>
Message-id: 20230210003147.1309376-2-jsnow@redhat.com
Signed-off-by: John Snow <jsnow@redhat.com>
2023-02-22 23:35:03 -05:00
Pierrick Bouvier
dbd672c87f sysemu/os-win32: fix setjmp/longjmp on windows-arm64
Windows implementation of setjmp/longjmp is done in
C:/WINDOWS/system32/ucrtbase.dll. Alas, on arm64, it seems to *always*
perform stack unwinding, which crashes from generated code.

By using alternative implementation built in mingw, we avoid doing stack
unwinding and this fixes crash when calling longjmp.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Acked-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230221153006.20300-3-pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-02-21 13:45:48 -10:00
Pierrick Bouvier
b3c3260295 util/cacheflush: fix cache on windows-arm64
ctr_el0 access is privileged on this platform and fails as an illegal
instruction.

Windows does not offer a way to flush data cache from userspace, and
only FlushInstructionCache is available in Windows API.

The generic implementation of flush_idcache_range uses,
__builtin___clear_cache, which already use the FlushInstructionCache
function. So we rely on that.

Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230221153006.20300-2-pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-02-21 08:53:03 -10:00
Richard Henderson
c3bef3b4de target/microblaze: Add gdbstub xml
Mirroring the upstream gdb xml files, the two stack boundary
registers are separated out.

Reviewed-by: Edgar E. Iglesias <edgar@zeroasic.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-02-21 08:52:17 -10:00
Ilya Leoshkevich
d7d5601c78 linux-user/microblaze: Handle privileged exception
Follow what kernel's full_exception() is doing.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Message-Id: <20230214140829.45392-4-iii@linux.ibm.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-02-21 08:44:13 -10:00
Ilya Leoshkevich
df8a688032 cpus: Make {start,end}_exclusive() recursive
Currently dying to one of the core_dump_signal()s deadlocks, because
dump_core_and_abort() calls start_exclusive() two times: first via
stop_all_tasks(), and then via preexit_cleanup() ->
qemu_plugin_user_exit().

There are a number of ways to solve this: resume after dumping core;
check cpu_in_exclusive_context() in qemu_plugin_user_exit(); or make
{start,end}_exclusive() recursive. Pick the last option, since it's
the most straightforward one.

Fixes: da91c19202 ("linux-user: Clean up when exiting due to a signal")
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Message-Id: <20230214140829.45392-3-iii@linux.ibm.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-02-21 08:44:13 -10:00
Ilya Leoshkevich
7de0816f69 linux-user: Always exit from exclusive state in fork_end()
fork()ed processes currently start with
current_cpu->in_exclusive_context set, which is, strictly speaking, not
correct, but does not cause problems (even assertion failures).

With one of the next patches, the code begins to rely on this value, so
fix it by always calling end_exclusive() in fork_end().

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Message-Id: <20230214140829.45392-2-iii@linux.ibm.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-02-21 08:44:13 -10:00
Richard Henderson
21a474c41d linux-user/sparc: Raise SIGILL for all unhandled software traps
The linux kernel's trap tables vector all unassigned trap
numbers to BAD_TRAP, which then raises SIGILL.

Tested-by: Ilya Leoshkevich <iii@linux.ibm.com>
Reported-by: Ilya Leoshkevich <iii@linux.ibm.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-02-21 08:44:13 -10:00
Richard Henderson
2627e4524e accel/tcg: Allow the second page of an instruction to be MMIO
If an instruction straddles a page boundary, and the first page
was ram, but the second page was MMIO, we would abort.  Handle
this as if both pages are MMIO, by setting the ram_addr_t for
the first page to -1.

Reported-by: Sid Manning <sidneym@quicinc.com>
Reported-by: Jørgen Hansen <Jorgen.Hansen@wdc.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-02-21 08:44:13 -10:00
TaiseiIto
49be78ca02 target/i386/gdbstub: Fix a bug about order of FPU stack in 'g' packets.
Before this commit, when GDB attached an OS working on QEMU, order of FPU
stack registers printed by GDB command 'info float' was wrong. There was a
bug causing the problem in 'g' packets sent by QEMU to GDB. The packets have
values of registers of machine emulated by QEMU containing FPU stack
registers. There are 2 ways to specify a x87 FPU stack register. The first
is specifying by absolute indexed register names (R0, ..., R7). The second
is specifying by stack top relative indexed register names (ST0, ..., ST7).
Values of the FPU stack registers should be located in 'g' packet and be
ordered by the relative index. But QEMU had located these registers ordered
by the absolute index. After this commit, when QEMU reads registers to make
a 'g' packet, QEMU specifies FPU stack registers by the relative index.
Then, the registers are ordered correctly in the packet. As a result, GDB,
the packet receiver, can print FPU stack registers in the correct order.

Signed-off-by: TaiseiIto <taisei1212@outlook.jp>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <TY0PR0101MB4285923FBE9AD97CE832D95BA4E59@TY0PR0101MB4285.apcprd01.prod.exchangelabs.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2023-02-21 13:46:49 +01:00
Peter Maydell
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Merge tag 'net-pull-request' of https://github.com/jasowang/qemu into staging

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# gpg: Signature made Fri 17 Feb 2023 05:37:28 GMT
# gpg:                using RSA key EF04965B398D6211
# gpg: Good signature from "Jason Wang (Jason Wang on RedHat) <jasowang@redhat.com>" [marginal]
# gpg: WARNING: This key is not certified with sufficiently trusted signatures!
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* tag 'net-pull-request' of https://github.com/jasowang/qemu:
  vdpa: fix VHOST_BACKEND_F_IOTLB_ASID flag check
  net: stream: add a new option to automatically reconnect
  vmnet: stop recieving events when VM is stopped
  net: Increase L2TPv3 buffer to fit jumboframes
  hw/net/vmxnet3: allow VMXNET3_MAX_MTU itself as a value
  hw/net/lan9118: log [read|write]b when mode_16bit is enabled rather than abort
  net: Replace "Supported NIC models" with "Available NIC models"
  net: Restore printing of the help text with "-nic help"
  net: Move the code to collect available NIC models to a separate function

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2023-02-21 11:28:31 +00:00
Peter Maydell
4919d0c44a Replace fork-based fuzzing with reboots.
Now the fuzzers will reboot the guest between inputs.
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Merge tag 'pr-2023-02-16' of https://gitlab.com/a1xndr/qemu into staging

Replace fork-based fuzzing with reboots.
Now the fuzzers will reboot the guest between inputs.

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# gpg: Signature made Fri 17 Feb 2023 04:04:10 GMT
# gpg:                using RSA key FAD4E2BF871375D6340517C44E661DDE583A964E
# gpg: Good signature from "Alexander Bulekov <alxndr@bu.edu>" [unknown]
# gpg: WARNING: This key is not certified with a trusted signature!
# gpg:          There is no indication that the signature belongs to the owner.
# Primary key fingerprint: FAD4 E2BF 8713 75D6 3405  17C4 4E66 1DDE 583A 964E

* tag 'pr-2023-02-16' of https://gitlab.com/a1xndr/qemu:
  docs/fuzz: remove mentions of fork-based fuzzing
  fuzz: remove fork-fuzzing scaffolding
  fuzz/i440fx: remove fork-based fuzzer
  fuzz/virtio-blk: remove fork-based fuzzer
  fuzz/virtio-net: remove fork-based fuzzer
  fuzz/virtio-scsi: remove fork-based fuzzer
  fuzz/generic-fuzz: add a limit on DMA bytes written
  fuzz/generic-fuzz: use reboots instead of forks to reset state
  fuzz: add fuzz_reset API
  hw/sparse-mem: clear memory on reset

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2023-02-21 11:28:01 +00:00
Peter Maydell
9b0699ab80 VFIO updates 2023-02-16
* Initial v2 migration support for vfio (Avihai Horon)
 
  * Add Cédric as vfio reviewer (Cédric Le Goater)
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Merge tag 'vfio-updates-20230216.0' of https://gitlab.com/alex.williamson/qemu into staging

VFIO updates 2023-02-16

 * Initial v2 migration support for vfio (Avihai Horon)

 * Add Cédric as vfio reviewer (Cédric Le Goater)

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# gpg: Signature made Thu 16 Feb 2023 21:03:17 GMT
# gpg:                using RSA key 42F6C04E540BD1A99E7B8A90239B9B6E3BB08B22
# gpg:                issuer "alex.williamson@redhat.com"
# gpg: Good signature from "Alex Williamson <alex.williamson@redhat.com>" [full]
# gpg:                 aka "Alex Williamson <alex@shazbot.org>" [full]
# gpg:                 aka "Alex Williamson <alwillia@redhat.com>" [full]
# gpg:                 aka "Alex Williamson <alex.l.williamson@gmail.com>" [full]
# Primary key fingerprint: 42F6 C04E 540B D1A9 9E7B  8A90 239B 9B6E 3BB0 8B22

* tag 'vfio-updates-20230216.0' of https://gitlab.com/alex.williamson/qemu:
  MAINTAINERS: Add myself as VFIO reviewer
  docs/devel: Align VFIO migration docs to v2 protocol
  vfio: Alphabetize migration section of VFIO trace-events file
  vfio/migration: Remove VFIO migration protocol v1
  vfio/migration: Implement VFIO migration protocol v2
  vfio/migration: Rename functions/structs related to v1 protocol
  vfio/migration: Move migration v1 logic to vfio_migration_init()
  vfio/migration: Block multiple devices migration
  vfio/common: Change vfio_devices_all_running_and_saving() logic to equivalent one
  vfio/migration: Allow migration without VFIO IOMMU dirty tracking support
  vfio/migration: Fix NULL pointer dereference bug
  linux-headers: Update to v6.2-rc8

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2023-02-20 17:08:05 +00:00
Peter Maydell
0aaf44776e Remove C virtiofsd
We deprecated the C virtiofsd in commit 34deee7b6a
 in v7.0 in favour of the Rust implementation at
 
   https://gitlab.com/virtio-fs/virtiofsd
 
 since then, the Rust version has had more development and
 has held up well.  It's time to say goodbye to the C version
 that got us going.
 
 Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
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Merge tag 'pull-virtiofs-20230216b' of https://gitlab.com/dagrh/qemu into staging

Remove C virtiofsd

We deprecated the C virtiofsd in commit 34deee7b6a
in v7.0 in favour of the Rust implementation at

  https://gitlab.com/virtio-fs/virtiofsd

since then, the Rust version has had more development and
has held up well.  It's time to say goodbye to the C version
that got us going.

Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>

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* tag 'pull-virtiofs-20230216b' of https://gitlab.com/dagrh/qemu:
  virtiofsd: Swing deprecated message to removed-features
  virtiofsd: Remove source
  virtiofsd: Remove build and docs glue
  virtiofsd: Remove test

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2023-02-20 17:07:30 +00:00
Paolo Bonzini
8d0efbcfa0 docs: build-platforms: refine requirements on Python build dependencies
Historically, the critical dependency for both building and running
QEMU has been the distro packages.  Because QEMU is written in C and C's
package management has been tied to distros (at least if you do not want
to bundle libraries with the binary, otherwise I suppose you could use
something like conda or wrapdb), C dependencies of QEMU would target the
version that is shipped in relatively old but still commonly used distros.

For non-C libraries, however, the situation is different, as these
languages have their own package management tool (cpan, pip, gem, npm,
and so on).  For some of these languages, the amount of dependencies
for even a simple program can easily balloon to the point that many
distros have given up on packaging non-C code.  For this reason, it has
become increasingly normal for developers to download dependencies into
a self-contained local environment, instead of relying on distro packages.

Fortunately, this affects QEMU only at build time, as qemu.git does
not package non-C artifacts such as the qemu.qmp package; but still,
as we make more use of Python, we experience a clash between a support
policy that is written for the C world, and dependencies (both direct
and indirect) that increasingly do not care for the distro versions
and are quick at moving past Python runtime versions that are declared
end-of-life.

For example, Python 3.6 has been EOL'd since December 2021 and Meson 0.62
(released the following March) already dropped support for it.  Yet,
Python 3.6 is the default version of the Python runtime for RHEL/CentOS
8 and SLE 15, respectively the penultimate and the most recent version
of two distros that QEMU would like to support.  (It is also the version
used by Ubuntu 18.04, but QEMU stopped supporting it in April 2022).

There are good reasons to move forward with the deprecation of Python
3.6 in QEMU as well: completing the configure->meson switch (which
requires Meson 0.63), and making the QAPI generator fully typed (which
requires newer versions of not just mypy but also Python, due to PEP563).

Fortunately, these long-term support distros do include newer versions of
the Python runtime.  However, these more recent runtimes only come with
a very small subset of the Python packages that the distro includes.
Because most dependencies are optional tests (avocado, mypy, flake8)
and Meson is bundled with QEMU, the most noticeably missing package is
Sphinx (and the readthedocs theme).  There are four possibilities:

* we change the support policy and stop supporting CentOS 8 and SLE 15;
  not a good idea since CentOS 8 is not an unreasonable distro for us to
  want to continue to support

* we keep supporting Python 3.6 until CentOS 8 and SLE 15 stop being
  supported.  This is a possibility---but we may want to revise the support
  policy anyway because SLE 16 has not even been released, so this would
  mean delaying those desirable reasons for perhaps three years;

* we support Python 3.6 just for building documentation, i.e. we are
  careful not to use Python 3.7+ features in our Sphinx extensions but are
  free to use them elsewhere.  Besides being more complicated to understand
  for developers, this can be quite limiting; parts of the QAPI generator
  run at sphinx-build time, which would exclude one of the areas which
  would benefit from a newer version of the runtime;

* we only support Python 3.7+, which means CentOS 8 CI and users
  have to either install Sphinx from pip or disable documentation.

This proposed update to the support policy chooses the last of these
possibilities.  It does by modifying three aspects of the support
policy:

* it introduces different support periods for *native* vs. *non-native*
  dependencies.  Non-native dependencies are currently Python ones only,
  and for simplicity the policy only mentions Python; however, the concept
  generalizes to other languages with a well-known upstream package
  manager, that users of older distributions can fetch dependencies from;

* it opens up the possibility of taking non-native dependencies from their
  own package index instead of using the version in the distribution.  The
  wording right now is specific to dependencies that are only required at
  build time.  In the future we may have to refine it if, for example, parts
  of QEMU will be written in Rust; in that case, crates would be handled
  in a similar way to submodules and vendored in the release tarballs.

* it mentions specifically that optional build dependencies are excluded
  from the platform policy.  Tools such as mypy don't affect the ability
  to build QEMU and move fast enough that distros cannot standardize on
  a single version of them (for example RHEL9 does not package them at
  all, nor does it run them at rpmbuild time).  In other cases, such as
  cross compilers, we have alternatives.

Right now, non-native dependencies have to be download manually by
running "pip" before "configure".  In the future, it will be desirable
for configure to set up a virtual environment and download them in the
same way that it populates git submodules (but, in this case, without
vendoring them in the release tarballs).

Just like with submodules, this would make things easier for people
that can afford accessing the network in their build environment; the
option to populate the build environment manually would remain for
people whose build machines lack network access.  The change to the
support policy neither requires nor forbids this future change.

[Thanks to Daniel P. Berrangé, Peter Maydell and others for discussions
 that were copied or summarized in the above commit message]

Cc: Markus Armbruster <armbru@redhat.com>
Cc: Peter Maydell <peter.maydell@linaro.org>
Cc: John Snow <jsnow@redhat.com>
Cc: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2023-02-20 17:58:48 +01:00
Peter Maydell
2d89cb1fe5 Block layer patches
- configure: Enable -Wthread-safety if present
 - no_co_wrapper to fix bdrv_open*() calls from coroutine context
 - curl fixes, including enablement of newer libcurl versions
 - MAINTAINERS: drop Vladimir from parallels block driver
 - hbitmap: fix hbitmap_status() return value for first dirty bit case
 - file-posix: Fix assertion failure in write_zeroes after moving
   bdrv_getlength() to co_wrapper
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Merge tag 'for-upstream' of https://repo.or.cz/qemu/kevin into staging

Block layer patches

- configure: Enable -Wthread-safety if present
- no_co_wrapper to fix bdrv_open*() calls from coroutine context
- curl fixes, including enablement of newer libcurl versions
- MAINTAINERS: drop Vladimir from parallels block driver
- hbitmap: fix hbitmap_status() return value for first dirty bit case
- file-posix: Fix assertion failure in write_zeroes after moving
  bdrv_getlength() to co_wrapper

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# gpg: Signature made Fri 17 Feb 2023 13:34:37 GMT
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* tag 'for-upstream' of https://repo.or.cz/qemu/kevin: (22 commits)
  hbitmap: fix hbitmap_status() return value for first dirty bit case
  block/file-posix: don't use functions calling AIO_WAIT_WHILE in worker threads
  MAINTAINERS: drop Vladimir from parallels block driver
  block: temporarily hold the new AioContext of bs_top in bdrv_append()
  block: Handle curl 7.55.0, 7.85.0 version changes
  block: Assert non-coroutine context for bdrv_open_inherit()
  block: Fix bdrv_co_create_opts_simple() to open images with no_co_wrapper
  vpc: Fix .bdrv_co_create(_opts) to open images with no_co_wrapper
  vmdk: Fix .bdrv_co_create(_opts) to open images with no_co_wrapper
  vhdx: Fix .bdrv_co_create(_opts) to open images with no_co_wrapper
  vdi: Fix .bdrv_co_create(_opts) to open images with no_co_wrapper
  qed: Fix .bdrv_co_create(_opts) to open images with no_co_wrapper
  qcow2: Fix open/create to open images with no_co_wrapper
  qcow: Fix .bdrv_co_create(_opts) to open images with no_co_wrapper
  parallels: Fix .bdrv_co_create(_opts) to open images with no_co_wrapper
  luks: Fix .bdrv_co_create(_opts) to open images with no_co_wrapper
  block: Create no_co_wrappers for open functions
  block-coroutine-wrapper: Introduce no_co_wrapper
  curl: Fix error path in curl_open()
  configure: Enable -Wthread-safety if present
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2023-02-20 13:39:18 +00:00