- Graph locking part 4 (node management)
- qemu-img map: report compressed data blocks
- block-backend: process I/O in the current AioContext
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Merge tag 'for-upstream' of https://repo.or.cz/qemu/kevin into staging
Block layer patches
- Graph locking part 4 (node management)
- qemu-img map: report compressed data blocks
- block-backend: process I/O in the current AioContext
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# gpg: Signature made Wed 20 Sep 2023 12:31:49 EDT
# gpg: using RSA key DC3DEB159A9AF95D3D7456FE7F09B272C88F2FD6
# gpg: issuer "kwolf@redhat.com"
# gpg: Good signature from "Kevin Wolf <kwolf@redhat.com>" [full]
# Primary key fingerprint: DC3D EB15 9A9A F95D 3D74 56FE 7F09 B272 C88F 2FD6
* tag 'for-upstream' of https://repo.or.cz/qemu/kevin: (28 commits)
block: mark aio_poll as non-coroutine
block-backend: process zoned requests in the current AioContext
block-backend: process I/O in the current AioContext
test-bdrv-drain: avoid race with BH in IOThread drain test
block: remove AIOCBInfo->get_aio_context()
qemu-img: map: report compressed data blocks
block: add BDRV_BLOCK_COMPRESSED flag for bdrv_block_status()
block: Mark bdrv_add/del_child() and caller GRAPH_WRLOCK
block: Mark bdrv_unref_child() GRAPH_WRLOCK
block: Mark bdrv_root_unref_child() GRAPH_WRLOCK
block: Take graph rdlock in bdrv_change_aio_context()
block: Take graph rdlock in bdrv_drop_intermediate()
block: Mark bdrv_parent_cb_change_media() GRAPH_RDLOCK
block: Mark bdrv_child_perm() GRAPH_RDLOCK
block: Mark bdrv_get_cumulative_perm() and callers GRAPH_RDLOCK
block: Mark bdrv_parent_perms_conflict() and callers GRAPH_RDLOCK
block: Mark bdrv_attach_child() GRAPH_WRLOCK
block: Call transaction callbacks with lock held
block: Mark bdrv_attach_child_common() GRAPH_WRLOCK
block: Mark bdrv_replace_child_tran() GRAPH_WRLOCK
...
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
- Fix for file-posix's zoning code crashing on I/O errors
- Throttling refactoring
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Merge tag 'pull-block-2023-09-01' of https://gitlab.com/hreitz/qemu into staging
Block patches
- Fix for file-posix's zoning code crashing on I/O errors
- Throttling refactoring
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# gpg: Signature made Fri 01 Sep 2023 04:11:46 EDT
# gpg: using RSA key CB62D7A0EE3829E45F004D34A1FA40D098019CDF
# gpg: issuer "hreitz@redhat.com"
# gpg: Good signature from "Hanna Reitz <hreitz@redhat.com>" [unknown]
# gpg: WARNING: The key's User ID is not certified with a trusted signature!
# gpg: There is no indication that the signature belongs to the owner.
# Primary key fingerprint: CB62 D7A0 EE38 29E4 5F00 4D34 A1FA 40D0 9801 9CDF
* tag 'pull-block-2023-09-01' of https://gitlab.com/hreitz/qemu:
tests/file-io-error: New test
file-posix: Simplify raw_co_prw's 'out' zone code
file-posix: Fix zone update in I/O error path
file-posix: Check bs->bl.zoned for zone info
file-posix: Clear bs->bl.zoned on error
block/throttle-groups: Use ThrottleDirection instread of bool is_write
fsdev: Use ThrottleDirection instread of bool is_write
throttle: use THROTTLE_MAX/ARRAY_SIZE for hard code
throttle: use enum ThrottleDirection instead of bool is_write
cryptodev: use NULL throttle timer cb for read direction
test-throttle: test read only and write only
throttle: support read-only and write-only
test-throttle: use enum ThrottleDirection
throttle: introduce enum ThrottleDirection
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
The synchronous bdrv_aio_cancel() function needs the acb's AioContext so
it can call aio_poll() to wait for cancellation.
It turns out that all users run under the BQL in the main AioContext, so
this callback is not needed.
Remove the callback, mark bdrv_aio_cancel() GLOBAL_STATE_CODE just like
its blk_aio_cancel() caller, and poll the main loop AioContext.
The purpose of this cleanup is to identify bdrv_aio_cancel() as an API
that does not work with the multi-queue block layer.
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-ID: <20230912231037.826804-2-stefanha@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Klaus Jensen <k.jensen@samsung.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
IA-64 and PA-RISC host support is already removed with commit
b1cef6d02f ("Drop remaining bits of ia64 host support").
Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Message-Id: <20230810225922.21600-1-akihiko.odaki@daynix.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Use autofree heap allocation instead of variable-length array on the
stack.
The codebase has very few VLAs, and if we can get rid of them all we
can make the compiler error on new additions. This is a defensive
measure against security bugs where an on-stack dynamic allocation
isn't correctly size-checked (e.g. CVE-2021-3527).
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-ID: <20230824164706.2652277-1-peter.maydell@linaro.org>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
The ongoing QEMU multi-queue block layer effort makes it possible for multiple
threads to process I/O in parallel. The nbd block driver is not compatible with
the multi-queue block layer yet because QIOChannel cannot be used easily from
coroutines running in multiple threads. This series changes the QIOChannel API
to make that possible.
In the current API, calling qio_channel_attach_aio_context() sets the
AioContext where qio_channel_yield() installs an fd handler prior to yielding:
qio_channel_attach_aio_context(ioc, my_ctx);
...
qio_channel_yield(ioc); // my_ctx is used here
...
qio_channel_detach_aio_context(ioc);
This API design has limitations: reading and writing must be done in the same
AioContext and moving between AioContexts involves a cumbersome sequence of API
calls that is not suitable for doing on a per-request basis.
There is no fundamental reason why a QIOChannel needs to run within the
same AioContext every time qio_channel_yield() is called. QIOChannel
only uses the AioContext while inside qio_channel_yield(). The rest of
the time, QIOChannel is independent of any AioContext.
In the new API, qio_channel_yield() queries the AioContext from the current
coroutine using qemu_coroutine_get_aio_context(). There is no need to
explicitly attach/detach AioContexts anymore and
qio_channel_attach_aio_context() and qio_channel_detach_aio_context() are gone.
One coroutine can read from the QIOChannel while another coroutine writes from
a different AioContext.
This API change allows the nbd block driver to use QIOChannel from any thread.
It's important to keep in mind that the block driver already synchronizes
QIOChannel access and ensures that two coroutines never read simultaneously or
write simultaneously.
This patch updates all users of qio_channel_attach_aio_context() to the
new API. Most conversions are simple, but vhost-user-server requires a
new qemu_coroutine_yield() call to quiesce the vu_client_trip()
coroutine when not attached to any AioContext.
While the API is has become simpler, there is one wart: QIOChannel has a
special case for the iohandler AioContext (used for handlers that must not run
in nested event loops). I didn't find an elegant way preserve that behavior, so
I added a new API called qio_channel_set_follow_coroutine_ctx(ioc, true|false)
for opting in to the new AioContext model. By default QIOChannel uses the
iohandler AioHandler. Code that formerly called
qio_channel_attach_aio_context() now calls
qio_channel_set_follow_coroutine_ctx(ioc, true) once after the QIOChannel is
created.
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Acked-by: Daniel P. Berrangé <berrange@redhat.com>
Message-ID: <20230830224802.493686-5-stefanha@redhat.com>
[eblake: also fix migration/rdma.c]
Signed-off-by: Eric Blake <eblake@redhat.com>
* target/i386: fix BQL handling of the legacy FERR interrupts
* target/i386: fix memory operand size for CVTPS2PD
* target/i386: Add support for AMX-COMPLEX in CPUID enumeration
* compile plugins on Darwin
* configure and meson cleanups
* drop mkvenv support for Python 3.7 and Debian10
* add wrap file for libblkio
* tweak KVM stubs
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Merge tag 'for-upstream' of https://gitlab.com/bonzini/qemu into staging
* only build util/async-teardown.c when system build is requested
* target/i386: fix BQL handling of the legacy FERR interrupts
* target/i386: fix memory operand size for CVTPS2PD
* target/i386: Add support for AMX-COMPLEX in CPUID enumeration
* compile plugins on Darwin
* configure and meson cleanups
* drop mkvenv support for Python 3.7 and Debian10
* add wrap file for libblkio
* tweak KVM stubs
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# gpg: Signature made Thu 07 Sep 2023 07:44:37 EDT
# gpg: using RSA key F13338574B662389866C7682BFFBD25F78C7AE83
# gpg: issuer "pbonzini@redhat.com"
# gpg: Good signature from "Paolo Bonzini <bonzini@gnu.org>" [full]
# gpg: aka "Paolo Bonzini <pbonzini@redhat.com>" [full]
# Primary key fingerprint: 46F5 9FBD 57D6 12E7 BFD4 E2F7 7E15 100C CD36 69B1
# Subkey fingerprint: F133 3857 4B66 2389 866C 7682 BFFB D25F 78C7 AE83
* tag 'for-upstream' of https://gitlab.com/bonzini/qemu: (51 commits)
docs/system/replay: do not show removed command line option
subprojects: add wrap file for libblkio
sysemu/kvm: Restrict kvm_pc_setup_irq_routing() to x86 targets
sysemu/kvm: Restrict kvm_has_pit_state2() to x86 targets
sysemu/kvm: Restrict kvm_get_apic_state() to x86 targets
sysemu/kvm: Restrict kvm_arch_get_supported_cpuid/msr() to x86 targets
target/i386: Restrict declarations specific to CONFIG_KVM
target/i386: Allow elision of kvm_hv_vpindex_settable()
target/i386: Allow elision of kvm_enable_x2apic()
target/i386: Remove unused KVM stubs
target/i386/cpu-sysemu: Inline kvm_apic_in_kernel()
target/i386/helper: Restrict KVM declarations to system emulation
hw/i386/fw_cfg: Include missing 'cpu.h' header
hw/i386/pc: Include missing 'cpu.h' header
hw/i386/pc: Include missing 'sysemu/tcg.h' header
Revert "mkvenv: work around broken pip installations on Debian 10"
mkvenv: assume presence of importlib.metadata
Python: Drop support for Python 3.7
configure: remove dead code
meson: list leftover CONFIG_* symbols
...
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-ID: <20230901101302.3618955-9-mjt@tls.msk.ru>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Use dev_t instead of a string, and ino_t instead of uint64_t.
The latter is likely to be identical on modern systems but is
more type-correct for usage.
Tested-by: Helge Deller <deller@gmx.de>
Reviewed-by: Ilya Leoshkevich <iii@linux.ibm.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <20230823065335.1919380-3-mjt@tls.msk.ru>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
liburing does not clear sqe->user_data. We must do it ourselves to avoid
undefined behavior in process_cqe() when user_data is used.
Note that fdmon-io_uring is currently disabled, so this is a latent bug
that does not affect users. Let's merge this fix now to make it easier
to enable fdmon-io_uring in the future (and I'm working on that).
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-ID: <20230426212639.82310-1-stefanha@redhat.com>
The first dimension of both to_check and
bucket_types_size/bucket_types_units is used as throttle direction,
use THROTTLE_MAX instead of hard coded number. Also use ARRAY_SIZE()
to avoid hard coded number for the second dimension.
Hanna noticed that the two array should be static. Yes, turn them
into static variables.
Reviewed-by: Hanna Czenczek <hreitz@redhat.com>
Signed-off-by: zhenwei pi <pizhenwei@bytedance.com>
Message-Id: <20230728022006.1098509-8-pizhenwei@bytedance.com>
Signed-off-by: Hanna Czenczek <hreitz@redhat.com>
enum ThrottleDirection is already there, use ThrottleDirection instead
of 'bool is_write' for throttle API, also modify related codes from
block, fsdev, cryptodev and tests.
Reviewed-by: Hanna Czenczek <hreitz@redhat.com>
Signed-off-by: zhenwei pi <pizhenwei@bytedance.com>
Message-Id: <20230728022006.1098509-7-pizhenwei@bytedance.com>
Signed-off-by: Hanna Czenczek <hreitz@redhat.com>
Only one direction is necessary in several scenarios:
- a read-only disk
- operations on a device are considered as *write* only. For example,
encrypt/decrypt/sign/verify operations on a cryptodev use a single
*write* timer(read timer callback is defined, but never invoked).
Allow a single direction in throttle, this reduces memory, and uplayer
does not need a dummy callback any more.
Reviewed-by: Alberto Garcia <berto@igalia.com>
Reviewed-by: Hanna Czenczek <hreitz@redhat.com>
Signed-off-by: zhenwei pi <pizhenwei@bytedance.com>
Message-Id: <20230728022006.1098509-4-pizhenwei@bytedance.com>
Signed-off-by: Hanna Czenczek <hreitz@redhat.com>
Use enum ThrottleDirection instead of number index.
Reviewed-by: Alberto Garcia <berto@igalia.com>
Reviewed-by: Hanna Czenczek <hreitz@redhat.com>
Signed-off-by: zhenwei pi <pizhenwei@bytedance.com>
Message-Id: <20230728022006.1098509-2-pizhenwei@bytedance.com>
Signed-off-by: Hanna Czenczek <hreitz@redhat.com>
Fix a crash in qemu-user when running
cat /proc/self/maps
in a chroot, where /proc isn't mounted.
The problem was introduced by commit 3ce3dd8ca9 ("util/selfmap:
Rewrite using qemu/interval-tree.h") where in open_self_maps_1() the
function read_self_maps() is called and which returns NULL if it can't
read the hosts /proc/self/maps file. Afterwards that NULL is fed into
interval_tree_iter_first() which doesn't check if the root node is NULL.
Fix it by adding a check if root is NULL and return NULL in that case.
Signed-off-by: Helge Deller <deller@gmx.de>
Fixes: 3ce3dd8ca9 ("util/selfmap: Rewrite using qemu/interval-tree.h")
Message-Id: <ZNOsq6Z7t/eyIG/9@p100>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
We will want to be able to search the set of mappings.
For this patch, the two users iterate the tree in order.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Clang complains:
../util/oslib-win32.c:483:56: error: omitting the parameter name in a
function definition is a C2x extension [-Werror,-Wc2x-extensions]
win32_close_exception_handler(struct _EXCEPTION_RECORD*,
^
Fix it by adding parameter names.
Message-Id: <20230728142748.305341-4-thuth@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Thomas Huth <thuth@redhat.com>
thread_pool_free() might have been called on the `pool`, which would
be a reason for worker_thread() to quit. In this case,
`pool->request_cond` is been destroyed.
If worker_thread() didn't managed to signal `request_cond` before it
been destroyed by thread_pool_free(), we got:
util/qemu-thread-posix.c:198: qemu_cond_signal: Assertion `cond->initialized' failed.
One backtrace:
__GI___assert_fail (assertion=0x55555614abcb "cond->initialized", file=0x55555614ab88 "util/qemu-thread-posix.c", line=198,
function=0x55555614ad80 <__PRETTY_FUNCTION__.17104> "qemu_cond_signal") at assert.c:101
qemu_cond_signal (cond=0x7fffb800db30) at util/qemu-thread-posix.c:198
worker_thread (opaque=0x7fffb800dab0) at util/thread-pool.c:129
qemu_thread_start (args=0x7fffb8000b20) at util/qemu-thread-posix.c:505
start_thread (arg=<optimized out>) at pthread_create.c:486
Reported here:
https://lore.kernel.org/all/ZJwoK50FcnTSfFZ8@MacBook-Air-de-Roger.local/T/#u
To avoid issue, keep lock while sending a signal to `request_cond`.
Fixes: 900fa208f5 ("thread-pool: replace semaphore with condition variable")
Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-Id: <20230714152720.5077-1-anthony.perard@citrix.com>
Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
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>
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>
Fixes a race condition (generally without optimization) in which
the subtree is re-read after the protecting if condition.
Cc: qemu-stable@nongnu.org
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
We recently introduced "-run-with" for options that influence the
runtime behavior of QEMU. This option has the big advantage that it
can group related options (so that it is easier for the users to spot
them) and that the options become introspectable via QMP this way.
So let's start moving more switches into this option group, starting
with "-chroot" now.
Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Reviewed-by: Michael Tokarev <mjt@tls.msk.ru>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Message-Id: <20230703074447.17044-1-thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Detect CRYPTO in cpuinfo; implement the accel hooks.
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Move the code from tcg/. Fix a bug in that PPC_FEATURE2_ARCH_3_10
is actually spelled PPC_FEATURE2_ARCH_3_1.
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Introduce qemu_win32_map_alloc() and qemu_win32_map_free() to allocate
shared memory mapping. The handle can be used to share the mapping with
another process.
Teach qemu_create_displaysurface() to allocate shared memory. Following
patches will introduce other places for shared memory allocation.
Other patches for -display dbus will share the memory when possible with
the client, to avoid expensive memory copy between the processes.
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20230606115658.677673-10-marcandre.lureau@redhat.com>
* Skip Vector set tail when vta is zero
* Move zc* out of the experimental properties
* Mask the implicitly enabled extensions in isa_string based on priv version
* Rework CPU extension validation and validate MISA changes
* Fixup PMP TLB cacheing errors
* Writing to pmpaddr and MML/MMWP correctly triggers TLB flushes
* Fixup PMP bypass checks
* Deny access if access is partially inside a PMP entry
* Correct OpenTitanState parent type/size
* Fix QEMU crash when NUMA nodes exceed available CPUs
* Fix pointer mask transformation for vector address
* Updates and improvements for Smstateen
* Support disas for Zcm* extensions
* Support disas for Z*inx extensions
* Remove unused decomp_rv32/64 value for vector instructions
* Enable PC-relative translation
* Assume M-mode FW in pflash0 only when "-bios none"
* Support using pflash via -blockdev option
* Add vector registers to log
* Clean up reference of Vector MTYPE
* Remove the check for extra Vector tail elements
* Smepmp: Return error when access permission not allowed in PMP
* Fixes for smsiaddrcfg and smsiaddrcfgh in AIA
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Merge tag 'pull-riscv-to-apply-20230614' of https://github.com/alistair23/qemu into staging
Second RISC-V PR for 8.1
* Skip Vector set tail when vta is zero
* Move zc* out of the experimental properties
* Mask the implicitly enabled extensions in isa_string based on priv version
* Rework CPU extension validation and validate MISA changes
* Fixup PMP TLB cacheing errors
* Writing to pmpaddr and MML/MMWP correctly triggers TLB flushes
* Fixup PMP bypass checks
* Deny access if access is partially inside a PMP entry
* Correct OpenTitanState parent type/size
* Fix QEMU crash when NUMA nodes exceed available CPUs
* Fix pointer mask transformation for vector address
* Updates and improvements for Smstateen
* Support disas for Zcm* extensions
* Support disas for Z*inx extensions
* Remove unused decomp_rv32/64 value for vector instructions
* Enable PC-relative translation
* Assume M-mode FW in pflash0 only when "-bios none"
* Support using pflash via -blockdev option
* Add vector registers to log
* Clean up reference of Vector MTYPE
* Remove the check for extra Vector tail elements
* Smepmp: Return error when access permission not allowed in PMP
* Fixes for smsiaddrcfg and smsiaddrcfgh in AIA
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# gpg: Signature made Wed 14 Jun 2023 03:17:14 AM CEST
# gpg: using RSA key 6AE902B6A7CA877D6D659296AF7C95130C538013
# gpg: Good signature from "Alistair Francis <alistair@alistair23.me>" [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: 6AE9 02B6 A7CA 877D 6D65 9296 AF7C 9513 0C53 8013
* tag 'pull-riscv-to-apply-20230614' of https://github.com/alistair23/qemu: (60 commits)
hw/intc: If mmsiaddrcfgh.L == 1, smsiaddrcfg and smsiaddrcfgh are read-only.
target/riscv: Smepmp: Return error when access permission not allowed in PMP
target/riscv/vector_helper.c: Remove the check for extra tail elements
target/riscv/vector_helper.c: clean up reference of MTYPE
target/riscv: Fix initialized value for cur_pmmask
util/log: Add vector registers to log
docs/system: riscv: Add pflash usage details
riscv/virt: Support using pflash via -blockdev option
hw/riscv: virt: Assume M-mode FW in pflash0 only when "-bios none"
target/riscv: Remove pc_succ_insn from DisasContext
target/riscv: Enable PC-relative translation
target/riscv: Use true diff for gen_pc_plus_diff
target/riscv: Change gen_set_pc_imm to gen_update_pc
target/riscv: Change gen_goto_tb to work on displacements
target/riscv: Introduce cur_insn_len into DisasContext
target/riscv: Fix target address to update badaddr
disas/riscv.c: Remove redundant parentheses
disas/riscv.c: Fix lines with over 80 characters
disas/riscv.c: Remove unused decomp_rv32/64 value for vector instructions
disas/riscv.c: Support disas for Z*inx extensions
...
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
<libkern/OSCacheControl.h> describes sys_icache_invalidate() as
"equivalent to sys_cache_control(kCacheFunctionPrepareForExecution)",
having kCacheFunctionPrepareForExecution defined as:
/* Prepare memory for execution. This should be called
* after writing machine instructions to memory, before
* executing them. It syncs the dcache and icache. [...]
*/
Since the dcache is also sync'd, we can avoid the sys_dcache_flush()
call when both rx/rw pointers are equal.
Suggested-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Message-Id: <20230605195911.96033-1-philmd@linaro.org>
Per the cache(3) man page, sys_icache_invalidate() and
sys_dcache_flush() are declared in <libkern/OSCacheControl.h>.
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230605175647.88395-2-philmd@linaro.org>
Added QEMU option 'vpu' to log vector extension registers such as gpr\fpu.
Signed-off-by: Ivan Klokov <ivan.klokov@syntacore.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20230410124451.15929-2-ivan.klokov@syntacore.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
qatomic_mb_read and qatomic_mb_set were the very first atomic primitives
introduced for QEMU; their semantics are unclear and they provide a false
sense of safety.
The last use of qatomic_mb_read() has been removed, so delete it.
qatomic_mb_set() instead can survive as an optimized
qatomic_set()+smp_mb(), similar to Linux's smp_store_mb(), but
rename it to qatomic_set_mb() to match the order of the two
operations.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
bdrv_pad_request() was the main user of qemu_iovec_init_extended().
HEAD^ has removed that use, so we can remove qemu_iovec_init_extended()
now.
The only remaining user is qemu_iovec_init_slice(), which can easily
inline the small part it really needs.
Note that qemu_iovec_init_extended() offered a memcpy() optimization to
initialize the new I/O vector. qemu_iovec_concat_iov(), which is used
to replace its functionality, does not, but calls qemu_iovec_add() for
every single element. If we decide this optimization was important, we
will need to re-implement it in qemu_iovec_concat_iov(), which might
also benefit its pre-existing users.
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
Signed-off-by: Hanna Czenczek <hreitz@redhat.com>
Message-Id: <20230411173418.19549-4-hreitz@redhat.com>
We want to inline qemu_iovec_init_extended() in block/io.c for padding
requests, and having access to qiov_slice() is useful for this. As a
public function, it is renamed to qemu_iovec_slice().
(We will need to count the number of I/O vector elements of a slice
there, and then later process this slice. Without qiov_slice(), we
would need to call qemu_iovec_subvec_niov(), and all further
IOV-processing functions may need to skip prefixing elements to
accomodate for a qiov_offset. Because qemu_iovec_subvec_niov()
internally calls qiov_slice(), we can just have the block/io.c code call
qiov_slice() itself, thus get the number of elements, and also create an
iovec array with the superfluous prefixing elements stripped, so the
following processing functions no longer need to skip them.)
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
Signed-off-by: Hanna Czenczek <hreitz@redhat.com>
Message-Id: <20230411173418.19549-2-hreitz@redhat.com>
We have several limitations and bugs worth fixing; they are
inter-related enough that it is not worth splitting this patch into
smaller pieces:
* ".5k" should work to specify 512, just as "0.5k" does
* "1.9999k" and "1." + "9"*50 + "k" should both produce the same
result of 2048 after rounding
* "1." + "0"*350 + "1B" should not be treated the same as "1.0B";
underflow in the fraction should not be lost
* "7.99e99" and "7.99e999" look similar, but our code was doing a
read-out-of-bounds on the latter because it was not expecting ERANGE
due to overflow. While we document that scientific notation is not
supported, and the previous patch actually fixed
qemu_strtod_finite() to no longer return ERANGE overflows, it is
easier to pre-filter than to try and determine after the fact if
strtod() consumed more than we wanted. Note that this is a
low-level semantic change (when endptr is not NULL, we can now
successfully parse with a scale of 'E' and then report trailing
junk, instead of failing outright with EINVAL); but an earlier
commit already argued that this is not a high-level semantic change
since the only caller passing in a non-NULL endptr also checks that
the tail is whitespace-only.
Fixes: https://gitlab.com/qemu-project/qemu/-/issues/1629
Fixes: cf923b78 ("utils: Improve qemu_strtosz() to have 64 bits of precision", 6.0.0)
Fixes: 7625a1ed ("utils: Use fixed-point arithmetic in qemu_strtosz", 6.0.0)
Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Hanna Czenczek <hreitz@redhat.com>
Message-Id: <20230522190441.64278-20-eblake@redhat.com>
[eblake: tweak function comment for accuracy]
Previous patches changed all integral qemu_strto*() error paths to
guarantee that *value is never left uninitialized. Do likewise for
qemu_strtod. Also, tighten qemu_strtod_finite() to never return a
non-finite value (prior to this patch, we were rejecting "inf" with
-EINVAL and unspecified result 0.0, but failing "9e999" with -ERANGE
and HUGE_VAL - which is infinite on IEEE machines - despite our
function claiming to recognize only finite values).
Auditing callers, we have no external callers of qemu_strtod, and
among the callers of qemu_strtod_finite:
- qapi/qobject-input-visitor.c:qobject_input_type_number_keyval() and
qapi/string-input-visitor.c:parse_type_number() which reject all
errors (does not matter what we store)
- utils/cutils.c:do_strtosz() incorrectly assumes that *endptr points
to '.' on all failures (that is, it is not distinguishing between
EINVAL and ERANGE; and therefore still does the WRONG THING for
"9.9e999". The change here does not entirely fix that (a later
patch will tackle this more systematically), but at least it fixes
the read-out-of-bounds first diagnosed in
https://gitlab.com/qemu-project/qemu/-/issues/1629
- our testsuite, which we can update to match what we document
Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Hanna Czenczek <hreitz@redhat.com>
CC: qemu-stable@nongnu.org
Message-Id: <20230522190441.64278-19-eblake@redhat.com>
Rather than open-coding two different ways to check for an unwanted
negative sign, reuse the same code in both functions. That way, if we
decide down the road to accept "-0" instead of rejecting it, we have
fewer places to change. Also, it means we now get ERANGE instead of
EINVAL for negative values in qemu_strtosz, which is reasonable for
what it represents. This in turn changes the expected output of a
couple of iotests.
The change is not quite complete: negative fractional scaled values
can trip us up. This will be fixed in a later patch addressing other
issues with fractional scaled values.
Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Hanna Czenczek <hreitz@redhat.com>
Message-Id: <20230522190441.64278-18-eblake@redhat.com>
Our goal in writing qemu_strtoi() and friends is to have an interface
harder to abuse than libc's strtol(). Leaving the return value
uninitialized on some but not all error paths does not lend itself
well to this goal; and our documentation wasn't helpful on what to
expect.
Note that the previous patch changed all qemu_strtosz() EINVAL error
paths to slam value to 0 rather than stay uninitialized, even when the
EINVAL eror occurs because of trailing junk. But for the remaining
integral qemu_strto*, it's easier to return the parsed value than to
force things back to zero, in part because of how check_strtox_error
works; in part because people expect that from libc strto* (while
there is no libc strtosz to compare to), and in part because doing so
creates less churn in the testsuite.
Here, the list of affected callers is much longer ('git grep
"qemu_strto[ui]" "*.c" "**/*.c" | grep -v tests/ |wc -l' outputs 107,
although a few of those are the implementation in in cutils.c), so
touching as little as possible is the wisest course of action.
Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Hanna Czenczek <hreitz@redhat.com>
Message-Id: <20230522190441.64278-17-eblake@redhat.com>
Making callers determine whether or not *value was populated on error
is not nice for usability. Pre-patch, we have unit tests that check
that *result is left unchanged on most EINVAL errors and set to 0 on
many ERANGE errors. This is subtly different from libc strtoumax()
behavior which returns UINT64_MAX on ERANGE errors, as well as
different from our parse_uint() which slams to 0 on EINVAL on the
grounds that we want our functions to be harder to mis-use than
strtoumax().
Let's audit callers:
- hw/core/numa.c:parse_numa() fixed in the previous patch to check for
errors
- migration/migration-hmp-cmds.c:hmp_migrate_set_parameter(),
monitor/hmp.c:monitor_parse_arguments(),
qapi/opts-visitor.c:opts_type_size(),
qapi/qobject-input-visitor.c:qobject_input_type_size_keyval(),
qemu-img.c:cvtnum_full(), qemu-io-cmds.c:cvtnum(),
target/i386/cpu.c:x86_cpu_parse_featurestr(), and
util/qemu-option.c:parse_option_size() appear to reject all failures
(although some with distinct messages for ERANGE as opposed to
EINVAL), so it doesn't matter what is in the value parameter on
error.
- All remaining callers are in the testsuite, where we can tweak our
expectations to match our new desired behavior.
Advancing to the end of the string parsed on overflow (ERANGE), while
still returning 0, makes sense (UINT64_MAX as a size is unlikely to be
useful); likewise, our size parsing code is complex enough that it's
easier to always return 0 when endptr is NULL but trailing garbage was
found, rather than trying to return the value of the prefix actually
parsed (no current caller cared about the value of the prefix).
Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Hanna Czenczek <hreitz@redhat.com>
Message-Id: <20230522190441.64278-16-eblake@redhat.com>
All the other qemu_strto* and parse_uint allow a NULL str. Having
qemu_strtosz not crash on qemu_strtosz(NULL, NULL, &value) is an easy
fix that adds some consistency between our string parsers.
Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Hanna Czenczek <hreitz@redhat.com>
Message-Id: <20230522190441.64278-13-eblake@redhat.com>
All the qemu_strto*() functions permit a NULL endptr, just like their
libc counterparts, leaving parse_uint() as the oddball that caused
SEGFAULT on NULL and required the user to call parse_uint_full()
instead. Relax things for consistency, even though the testsuite is
the only impacted caller. Add one more unit test to ensure even
parse_uint_full(NULL, 0, &value) works. This also fixes our code to
uniformly favor EINVAL over ERANGE when both apply.
Also fixes a doc mismatch @v vs. a parameter named value.
Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Hanna Czenczek <hreitz@redhat.com>
Message-Id: <20230522190441.64278-9-eblake@redhat.com>
It's already confusing that we have two very similar functions for
wrapping the parse of a 64-bit unsigned value, differing mainly on
whether they permit leading '-'. Adjust the signature of parse_uint()
and parse_uint_full() to be like all of qemu_strto*(): put the result
parameter last, use the same types (uint64_t and unsigned long long
have the same width, but are not always the same type), and mark
endptr const (this latter change only affects the rare caller of
parse_uint). Adjust all callers in the tree.
While at it, note that since cutils.c already includes:
QEMU_BUILD_BUG_ON(sizeof(int64_t) != sizeof(long long));
we are guaranteed that the result of parse_uint* cannot exceed
UINT64_MAX (or the build would have failed), so we can drop
pre-existing dead comparisons in opts-visitor.c that were never false.
Reviewed-by: Hanna Czenczek <hreitz@redhat.com>
Message-Id: <20230522190441.64278-8-eblake@redhat.com>
[eblake: Drop dead code spotted by Markus]
Signed-off-by: Eric Blake <eblake@redhat.com>
These two functions are subtly different, and not just because of
swapped parameter order. It took me adding better unit tests to
figure out why. Document the differences to make it more obvious to
developers trying to pick which one to use, as well as to aid in
upcoming semantic changes.
While touching the documentation, adjust a mis-statement: parse_uint
does not return -EINVAL on invalid base, but assert()s, like all the
other qemu_strto* functions that take a base argument.
Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Hanna Czenczek <hreitz@redhat.com>
Message-Id: <20230522190441.64278-7-eblake@redhat.com>
