The implementation for these instructions handles -0 as an invalid float
point value, whereas the Hexagon hardware considers it the same as +0
(which is valid). Let's fix that and add a regression test.
Signed-off-by: Matheus Tavares Bernardino <quic_mathbern@quicinc.com>
Reviewed-by: Brian Cain <bcain@quicinc.com>
Reviewed-by: Taylor Simpson <ltaylorsimpson@gmail.com>
Signed-off-by: Brian Cain <bcain@quicinc.com>
Apparently 'qemu-img info' doesn't report the backing file format field
for qed (as it does for qcow2):
$ qemu-img create -f qed base.qed 1M && qemu-img create -f qed -b base.qed -F qed top.qed 1M
$ qemu-img create -f qcow2 base.qcow2 1M && qemu-img create -f qcow2 -b base.qcow2 -F qcow2 top.qcow2 1M
$ qemu-img info top.qed | grep 'backing file format'
$ qemu-img info top.qcow2 | grep 'backing file format'
backing file format: qcow2
This leads to the 024 test failure with -qed. Let's just filter the
field out and exclude it from the output.
This is a fixup for the commit f93e65ee51 ("iotests/{024, 271}: add
testcases for qemu-img rebase").
Reported-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Andrey Drobyshev <andrey.drobyshev@virtuozzo.com>
Message-ID: <20240730094701.790624-1-andrey.drobyshev@virtuozzo.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
When reading with `read_cluster` we get the `mapping` with
`find_mapping_for_cluster` and then we call `open_file` for this
mapping.
The issue appear when its the same file, but a second cluster that is
not immediately after it, imagine clusters `500 -> 503`, this will give
us 2 mappings one has the range `500..501` and another `503..504`, both
point to the same file, but different offsets.
When we don't open the file since the path is the same, we won't assign
`s->current_mapping` and thus accessing way out of bound of the file.
From our example above, after `open_file` (that didn't open anything) we
will get the offset into the file with
`s->cluster_size*(cluster_num-s->current_mapping->begin)`, which will
give us `0x2000 * (504-500)`, which is out of bound for this mapping and
will produce some issues.
Signed-off-by: Amjad Alsharafi <amjadsharafi10@gmail.com>
Message-ID: <1f3ea115779abab62ba32c788073cdc99f9ad5dd.1721470238.git.amjadsharafi10@gmail.com>
[kwolf: Simplified the patch based on Amjad's analysis and input]
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
How this `abort` was intended to check for was:
- if the `mapping->first_mapping_index` is not the same as
`first_mapping_index`, which **should** happen only in one case,
when we are handling the first mapping, in that case
`mapping->first_mapping_index == -1`, in all other cases, the other
mappings after the first should have the condition `true`.
- From above, we know that this is the first mapping, so if the offset
is not `0`, then abort, since this is an invalid state.
The issue was that `first_mapping_index` is not set if we are
checking from the middle, the variable `first_mapping_index` is
only set if we passed through the check `cluster_was_modified` with the
first mapping, and in the same function call we checked the other
mappings.
One approach is to go into the loop even if `cluster_was_modified`
is not true so that we will be able to set `first_mapping_index` for the
first mapping, but since `first_mapping_index` is only used here,
another approach is to just check manually for the
`mapping->first_mapping_index != -1` since we know that this is the
value for the only entry where `offset == 0` (i.e. first mapping).
Signed-off-by: Amjad Alsharafi <amjadsharafi10@gmail.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Message-ID: <b0fbca3ee208c565885838f6a7deeaeb23f4f9c2.1721470238.git.amjadsharafi10@gmail.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Before this commit, the behavior when calling `commit_one_file` for
example with `offset=0x2000` (second cluster), what will happen is that
we won't fetch the next cluster from the fat, and instead use the first
cluster for the read operation.
This is due to off-by-one error here, where `i=0x2000 !< offset=0x2000`,
thus not fetching the next cluster.
Signed-off-by: Amjad Alsharafi <amjadsharafi10@gmail.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Tested-by: Kevin Wolf <kwolf@redhat.com>
Message-ID: <b97c1e1f1bc2f776061ae914f95d799d124fcd73.1721470238.git.amjadsharafi10@gmail.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
In the case of scsi-block, RESERVATION_CONFLICT is not a backend error,
but indicates that the guest tried to make a request that it isn't
allowed to execute. Pass the error to the guest so that it can decide
what to do with it.
Without this, if we stop the VM in response to a RESERVATION_CONFLICT
(as is the default policy in management software such as oVirt or
KubeVirt), it can happen that the VM cannot be resumed any more because
every attempt to resume it immediately runs into the same error and
stops the VM again.
One case that expects RESERVATION_CONFLICT errors to be visible in the
guest is running the validation tests in Windows 2019's Failover Cluster
Manager, which intentionally tries to execute invalid requests to see if
they are properly rejected.
Buglink: https://issues.redhat.com/browse/RHEL-50000
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Message-ID: <20240731123207.27636-5-kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
scsi_block_sgio_complete() has surprising behaviour in that there are
error cases in which it directly completes the request and never calls
the passed callback. In the current state of the code, this doesn't seem
to result in bugs, but with future code changes, we must be careful to
never rely on the callback doing some cleanup until this code smell is
fixed. For now, just add warnings to make people aware of the trap.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Message-ID: <20240731123207.27636-4-kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Instead of calling into scsi_handle_rw_error() directly from
scsi_block_sgio_complete() and skipping the normal callback, go through
the normal cleanup path by calling the callback with a positive error
value.
The important difference here is not only that the code path is cleaner,
but that the callbacks set r->req.aiocb = NULL. If we skip setting this
and the error action is BLOCK_ERROR_ACTION_STOP, resuming the VM runs
into an assertion failure in scsi_read_data() or scsi_write_data()
because the dangling aiocb pointer is unexpected.
Fixes: a108557bbf ("scsi: inline sg_io_sense_from_errno() into the callers.")
Buglink: https://issues.redhat.com/browse/RHEL-50000
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Message-ID: <20240731123207.27636-3-kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
In some error cases, scsi_block_sgio_complete() never calls the passed
callback, but directly completes the request. This leads to bugs because
its error paths are not exact copies of what the callback would normally
do.
In preparation to fix this, allow passing positive return values to the
callbacks that represent the status code that should be used to complete
the request.
scsi_handle_rw_error() already handles positive values for its ret
parameter because scsi_block_sgio_complete() calls directly into it.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Message-ID: <20240731123207.27636-2-kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Upstream clang 18 (and backports to clang 17 in Fedora and RHEL)
implemented support for __attribute__((cleanup())) in its Thread Safety
Analysis, so we can now actually have a proper implementation of
WITH_GRAPH_RDLOCK_GUARD() that understands when we acquire and when we
release the lock.
-Wthread-safety is now only enabled if the compiler is new enough to
understand this pattern. In theory, we could have used some #ifdefs to
keep the existing basic checks on old compilers, but as long as someone
runs a newer compiler (and our CI does), we will catch locking problems,
so it's probably not worth keeping multiple implementations for this.
The implementation can't use g_autoptr any more because the glib macros
define wrapper functions that don't have the right TSA attributes, so
the compiler would complain about them. Just use the cleanup attribute
directly instead.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-ID: <20240627181245.281403-3-kwolf@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
The graph lock needs to be held when calling bdrv_co_pdiscard(). Fix
block_copy_task_entry() to take it for the call.
WITH_GRAPH_RDLOCK_GUARD() was implemented in a weak way because of
limitations in clang's Thread Safety Analysis at the time, so that it
only asserts that the lock is held (which allows calling functions that
require the lock), but we never deal with the unlocking (so even after
the scope of the guard, the compiler assumes that the lock is still
held). This is why the compiler didn't catch this locking error.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-ID: <20240627181245.281403-2-kwolf@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
BlockdevSnapshotInternal is the arguments type of command
blockdev-snapshot-internal-sync. Its doc comment contains this note:
# .. note:: In a transaction, if @name is empty or any snapshot matching
# @name exists, the operation will fail. Only some image formats
# support it; for example, qcow2, and rbd.
"In a transaction" is misleading, and "if @name is empty or any
snapshot matching @name exists, the operation will fail" is redundant
with the command's Errors documentation. Drop.
The remainder is fine. Move it to the command's doc comment, where it
is more prominently visible, with a slight rephrasing for clarity.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-ID: <20240718123609.3063055-1-armbru@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Misc HW & UI patches
- Replace Loongson IPI with LoongArch IPI on LoongArch Virt machine (Bibo)
- SD card: Do not abort when reading DAT lines on invalid cmd state (Phil)
- SDHCI: Reset @data_count index on invalid ADMA transfers (Phil)
- Don't decrement PFlash counter below 0 (Peter)
- Explicit a 8bit truncate on IDE ATAPI (Peter)
- Silent Coverity warning in ISA FDC (Peter)
- Remove dead code in PCI IDE bmdma_prepare_buf (Peter)
- Improve OpenGL and related display error messages (Peter)
- Set PCI base address register write mask on GC64120 host bridge (Phil)
- List PCIe Root Port and PCIe-to-PCI bridge in QEMU PCI IDs list (George)
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# gpg: using RSA key FAABE75E12917221DCFD6BB2E3E32C2CDEADC0DE
# gpg: Good signature from "Philippe Mathieu-Daudé (F4BUG) <f4bug@amsat.org>" [full]
* tag 'hw-misc-20240806' of https://github.com/philmd/qemu: (28 commits)
docs/specs/pci-ids: Fix markup
docs/specs/pci-ids: Add missing devices
hw/pci-host/gt64120: Reset config registers during RESET phase
hw/pci-host/gt64120: Set PCI base address register write mask
ui/console: Note in '-display help' that some backends support suboptions
system/vl.c: Expand OpenGL related errors
hw/display/virtio-gpu: Improve "opengl is not available" error message
hw/ide/pci: Remove dead code from bmdma_prepare_buf()
hw/block/fdc-isa: Assert that isa_fdc_get_drive_max_chs() found something
hw/ide/atapi: Be explicit that assigning to s->lcyl truncates
hw/block/pflash_cfi01: Don't decrement pfl->counter below 0
hw/sd/sdhci: Reset @data_count index on invalid ADMA transfers
hw/sd/sdcard: Do not abort when reading DAT lines on invalid cmd state
hw/sd/sdcard: Explicit dummy byte value
hw/intc/loongson_ipi: Restrict to MIPS
hw/loongarch/virt: Replace Loongson IPI with LoongArch IPI
hw/intc/loongarch_ipi: Add loongarch IPI support
hw/intc/loongson_ipi: Move common code to loongson_ipi_common.c
hw/intc/loongson_ipi: Expose loongson_ipi_core_read/write helpers
hw/intc/loongson_ipi: Add LoongsonIPICommonClass::cpu_by_arch_id handler
...
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reset config values in the device RESET phase, not only once
when the device is realized, because otherwise the device can
use unknown values at reset.
Since we are adding a new reset method, use the preferred
Resettable API (for a simple leaf device reset, a
DeviceClass::reset method and a ResettableClass::reset_hold
method are essentially identical).
Reported-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: BALATON Zoltan <balaton@eik.bme.hu>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-Id: <20240802213122.86852-3-philmd@linaro.org>
When booting Linux we see:
PCI host bridge to bus 0000:00
pci_bus 0000:00: root bus resource [mem 0x10000000-0x17ffffff]
pci_bus 0000:00: root bus resource [io 0x1000-0x1fffff]
pci_bus 0000:00: No busn resource found for root bus, will use [bus 00-ff]
pci 0000:00:00.0: [11ab:4620] type 00 class 0x060000
pci 0000:00:00.0: [Firmware Bug]: reg 0x14: invalid BAR (can't size)
pci 0000:00:00.0: [Firmware Bug]: reg 0x18: invalid BAR (can't size)
pci 0000:00:00.0: [Firmware Bug]: reg 0x1c: invalid BAR (can't size)
pci 0000:00:00.0: [Firmware Bug]: reg 0x20: invalid BAR (can't size)
pci 0000:00:00.0: [Firmware Bug]: reg 0x24: invalid BAR (can't size)
This is due to missing base address register write mask.
Add it to get:
PCI host bridge to bus 0000:00
pci_bus 0000:00: root bus resource [mem 0x10000000-0x17ffffff]
pci_bus 0000:00: root bus resource [io 0x1000-0x1fffff]
pci_bus 0000:00: No busn resource found for root bus, will use [bus 00-ff]
pci 0000:00:00.0: [11ab:4620] type 00 class 0x060000
pci 0000:00:00.0: reg 0x10: [mem 0x00000000-0x00000fff pref]
pci 0000:00:00.0: reg 0x14: [mem 0x01000000-0x01000fff pref]
pci 0000:00:00.0: reg 0x18: [mem 0x1c000000-0x1c000fff]
pci 0000:00:00.0: reg 0x1c: [mem 0x1f000000-0x1f000fff]
pci 0000:00:00.0: reg 0x20: [mem 0x1be00000-0x1be00fff]
pci 0000:00:00.0: reg 0x24: [io 0x14000000-0x14000fff]
Since this device is only used by MIPS machines which aren't
versioned, we don't need to update migration compat machinery.
Mention the datasheet referenced. Remove the "Malta assumptions
ahead" comment since the reset values from the datasheet are used.
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: BALATON Zoltan <balaton@eik.bme.hu>
Message-Id: <20240802213122.86852-2-philmd@linaro.org>
Currently '-display help' only prints the available backends. Some
of those backends support suboptions (e.g. '-display gtk,gl=on').
Mention that in the help output, and point the user to where they
might be able to find more information about the suboptions.
The new output looks like this:
$ qemu-system-aarch64 -display help
Available display backend types:
none
gtk
sdl
egl-headless
curses
spice-app
dbus
Some display backends support suboptions, which can be set with
-display backend,option=value,option=value...
For a short list of the suboptions for each display, see the top-level -help output; more detail is in the documentation.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Acked-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-ID: <20240731154136.3494621-4-peter.maydell@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Expand the OpenGL related error messages we produce for various
"OpenGL not present/not supported" cases, to hopefully guide the
user towards how to fix things.
Now if the user tries to enable GL on a backend that doesn't
support it the error message is a bit more precise:
$ qemu-system-aarch64 -M virt -device virtio-gpu-gl -display curses,gl=on
qemu-system-aarch64: OpenGL is not supported by display backend 'curses'
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Acked-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
[AJB: Improved error report message]
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Message-ID: <20240731154136.3494621-3-peter.maydell@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
If the user tries to use the virtio-gpu-gl device but the display
backend doesn't have OpenGL support enabled, we currently print a
rather uninformative error message:
$ qemu-system-aarch64 -M virt -device virtio-gpu-gl
qemu-system-aarch64: -device virtio-gpu-gl: opengl is not available
Since OpenGL is not enabled on display frontends by default, users
are quite likely to run into this. Improve the error message to
be more specific and to suggest to the user a path forward.
Note that the case of "user tried to enable OpenGL but the display
backend doesn't handle it" is caught elsewhere first, so we can
assume that isn't the problem:
$ qemu-system-aarch64 -M virt -device virtio-gpu-gl -display curses,gl=on
qemu-system-aarch64: OpenGL is not supported by the display
(Use of error_append_hint() requires us to add an ERRP_GUARD() to
the function, as noted in include/qapi/error.h.)
With this commit we now produce the hopefully more helpful error:
$ ./build/x86/qemu-system-aarch64 -M virt -device virtio-gpu-gl
qemu-system-aarch64: -device virtio-gpu-gl: The display backend does not have OpenGL support enabled
It can be enabled with '-display BACKEND,gl=on' where BACKEND is the name of the display backend to use.
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/2443
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Acked-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Message-ID: <20240731154136.3494621-2-peter.maydell@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Coverity notes that the code at the end of the loop in
bmdma_prepare_buf() is unreachable. This is because in commit
9fbf0fa81f ("ide: remove hardcoded 2GiB transactional limit")
we removed the only codepath in the loop which could "break" out of
it, but didn't notice that this meant we should also remove the code
at the end of the loop.
Remove the dead code.
Resolves: Coverity CID 1547772
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
[PMD: Break and return once at EOF]
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20240805182419.22239-1-philmd@linaro.org>
Coverity complains about an overflow in isa_fdc_get_drive_max_chs()
that can happen if the loop over fd_formats never finds a match,
because we initialize *maxc to 0 and then at the end of the
function decrement it.
This can't ever actually happen because fd_formats has at least
one entry for each FloppyDriveType, so we must at least once
find a match and update *maxc, *maxh and *maxs. Assert that we
did find a match, which should keep Coverity happy and will also
detect possible bugs in the data in fd_formats.
Resolves: Coverity CID 1547663
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <20240731143617.3391947-6-peter.maydell@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
In ide_atapi_cmd_reply_end() we calculate a 16-bit size, and then
assign its two halves to s->lcyl and s->hcyl like this:
s->lcyl = size;
s->hcyl = size >> 8;
Coverity warns that the first line here can overflow the
8-bit s->lcyl variable. This is true, and in this case we're
deliberately only after the low 8 bits of the value. The
code is clearer to both humans and Coverity if we're explicit
that we only wanted the low 8 bits, though.
Resolves: Coverity CID 1547621
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Message-ID: <20240731143617.3391947-5-peter.maydell@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
In pflash_write() Coverity points out that we can decrement the
unsigned pfl->counter below zero, which makes it wrap around. In
fact this is harmless, because if pfl->counter is 0 at this point we
also increment pfl->wcycle to 3, and the wcycle == 3 handling doesn't
look at counter; the only way back into code which looks at the
counter value is via wcycle == 1, which will reinitialize the counter.
But it's arguably a little clearer to break early in the "counter ==
0" if(), to avoid the decrement-below-zero.
Resolves: Coverity CID 1547611
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Message-ID: <20240731143617.3391947-4-peter.maydell@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
A new minor version of OpenSBI was just released after our bump to
OpenSBI 1.5. It contains significant bug fixes that it's worth doing
a new update for QEMU 9.1.
Submodule roms/opensbi 455de672dd..43cace6c36:
> lib: sbi: check result of pmp_get() in is_pmp_entry_mapped()
> lib: sbi: fwft: fix incorrect size passed to sbi_zalloc()
> lib: sbi: dbtr: fix potential NULL pointer dereferences
> include: Adjust Sscofpmf mhpmevent mask for upper 8 bits
> lib: sbi_hsm: Save/restore menvcfg only when it exists
Signed-off-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
Message-ID: <20240805120259.1705016-2-dbarboza@ventanamicro.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Anton Johansson