Commit Graph

1713 Commits

Author SHA1 Message Date
Richard Henderson
7c18f2d663 * Fix compilation issues under Debian 10
* Update kernel headers to 6.3rc5
 * Suppress GCC13 false positive in aio_bh_poll()
 * Add new x86 feature bits
 * Coverity fixes
 * More steps towards removing qatomic_mb_set/read
 * Fix reduced-phys-bits value for AMD SEV
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Merge tag 'for-upstream' of https://gitlab.com/bonzini/qemu into staging

* Fix compilation issues under Debian 10
* Update kernel headers to 6.3rc5
* Suppress GCC13 false positive in aio_bh_poll()
* Add new x86 feature bits
* Coverity fixes
* More steps towards removing qatomic_mb_set/read
* Fix reduced-phys-bits value for AMD SEV

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# gpg:                using RSA key F13338574B662389866C7682BFFBD25F78C7AE83
# gpg:                issuer "pbonzini@redhat.com"
# gpg: Good signature from "Paolo Bonzini <bonzini@gnu.org>" [undefined]
# gpg:                 aka "Paolo Bonzini <pbonzini@redhat.com>" [undefined]
# 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: 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:
  cpus-common: stop using mb_set/mb_read
  async: Suppress GCC13 false positive in aio_bh_poll()
  tests: vhost-user-test: release mutex on protocol violation
  Update linux headers to v6.3rc5
  update-linux-headers.sh: Add missing kernel headers.
  Fix libvhost-user.c compilation.
  target/i386: Add support for PREFETCHIT0/1 in CPUID enumeration
  target/i386: Add support for AVX-NE-CONVERT in CPUID enumeration
  target/i386: Add support for AVX-VNNI-INT8 in CPUID enumeration
  target/i386: Add support for AVX-IFMA in CPUID enumeration
  target/i386: Add support for AMX-FP16 in CPUID enumeration
  target/i386: Add support for CMPCCXADD in CPUID enumeration
  i386/cpu: Update how the EBX register of CPUID 0x8000001F is set
  i386/sev: Update checks and information related to reduced-phys-bits
  qemu-options.hx: Update the reduced-phys-bits documentation
  qapi, i386/sev: Change the reduced-phys-bits value from 5 to 1

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-04-29 23:07:17 +01:00
Cédric Le Goater
d66ba6dc1c async: Suppress GCC13 false positive in aio_bh_poll()
GCC13 reports an error :

../util/async.c: In function ‘aio_bh_poll’:
include/qemu/queue.h:303:22: error: storing the address of local variable ‘slice’ in ‘*ctx.bh_slice_list.sqh_last’ [-Werror=dangling-pointer=]
  303 |     (head)->sqh_last = &(elm)->field.sqe_next;                          \
      |     ~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
../util/async.c:169:5: note: in expansion of macro ‘QSIMPLEQ_INSERT_TAIL’
  169 |     QSIMPLEQ_INSERT_TAIL(&ctx->bh_slice_list, &slice, next);
      |     ^~~~~~~~~~~~~~~~~~~~
../util/async.c:161:17: note: ‘slice’ declared here
  161 |     BHListSlice slice;
      |                 ^~~~~
../util/async.c:161:17: note: ‘ctx’ declared here

But the local variable 'slice' is removed from the global context list
in following loop of the same routine. Add a pragma to silent GCC.

Cc: Stefan Hajnoczi <stefanha@redhat.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Cédric Le Goater <clg@redhat.com>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Tested-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Message-Id: <20230420202939.1982044-1-clg@kaod.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2023-04-29 14:19:01 +02:00
Richard Henderson
2074424ef6 * Prevent reentrant DMA accesses by default
* Only compile hw/rdma code when necessary
 * Fix a potential locking issue in the vhost-user-test
 * Offer more registers in GDB for s390x TCG
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Merge tag 'pull-request-2023-04-28' of https://gitlab.com/thuth/qemu into staging

* Prevent reentrant DMA accesses by default
* Only compile hw/rdma code when necessary
* Fix a potential locking issue in the vhost-user-test
* Offer more registers in GDB for s390x TCG

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# gpg: Signature made Fri 28 Apr 2023 10:39:05 AM BST
# gpg:                using RSA key 27B88847EEE0250118F3EAB92ED9D774FE702DB5
# gpg:                issuer "thuth@redhat.com"
# gpg: Good signature from "Thomas Huth <th.huth@gmx.de>" [undefined]
# gpg:                 aka "Thomas Huth <thuth@redhat.com>" [undefined]
# gpg:                 aka "Thomas Huth <th.huth@posteo.de>" [unknown]
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* tag 'pull-request-2023-04-28' of https://gitlab.com/thuth/qemu:
  apic: disable reentrancy detection for apic-msi
  raven: disable reentrancy detection for iomem
  bcm2835_property: disable reentrancy detection for iomem
  lsi53c895a: disable reentrancy detection for script RAM
  hw: replace most qemu_bh_new calls with qemu_bh_new_guarded
  checkpatch: add qemu_bh_new/aio_bh_new checks
  async: Add an optional reentrancy guard to the BH API
  memory: prevent dma-reentracy issues
  tests: vhost-user-test: release mutex on protocol violation
  hw/rdma: VMW_PVRDMA should depend on VMXNET3_PCI
  hw/rdma: Compile target-independent parts of the rdma code only once
  hw/rdma: Remove unused macros PG_DIR_SZ and PG_TBL_SZ
  s390x/gdb: Split s390-virt.xml

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-04-28 10:55:57 +01:00
Alexander Bulekov
9c86c97f12 async: Add an optional reentrancy guard to the BH API
Devices can pass their MemoryReentrancyGuard (from their DeviceState),
when creating new BHes. Then, the async API will toggle the guard
before/after calling the BH call-back. This prevents bh->mmio reentrancy
issues.

Signed-off-by: Alexander Bulekov <alxndr@bu.edu>
Reviewed-by: Darren Kenny <darren.kenny@oracle.com>
Message-Id: <20230427211013.2994127-3-alxndr@bu.edu>
[thuth: Fix "line over 90 characters" checkpatch.pl error]
Signed-off-by: Thomas Huth <thuth@redhat.com>
2023-04-28 11:31:07 +02:00
Paolo Bonzini
7757b55eed stat64: Add stat64_set() operation
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Juan Quintela <quintela@redhat.com>
2023-04-27 16:39:43 +02:00
Emanuele Giuseppe Esposito
aef04fc790 thread-pool: avoid passing the pool parameter every time
thread_pool_submit_aio() is always called on a pool taken from
qemu_get_current_aio_context(), and that is the only intended
use: each pool runs only in the same thread that is submitting
work to it, it can't run anywhere else.

Therefore simplify the thread_pool_submit* API and remove the
ThreadPool function parameter.

Signed-off-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Message-Id: <20230203131731.851116-5-eesposit@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2023-04-25 13:17:28 +02:00
Emanuele Giuseppe Esposito
0fdb73112b thread-pool: use ThreadPool from the running thread
Use qemu_get_current_aio_context() where possible, since we always
submit work to the current thread anyways.

We want to also be sure that the thread submitting the work is
the same as the one processing the pool, to avoid adding
synchronization to the pool list.

Signed-off-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Message-Id: <20230203131731.851116-4-eesposit@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2023-04-25 13:17:28 +02:00
Peter Xu
fa45f8dab9 util/mmap-alloc: qemu_fd_getfs()
This new helper fetches file system type for a fd.  Only Linux is
implemented so far.  Currently only tmpfs and hugetlbfs are defined,
but it can grow as needed.

Signed-off-by: Peter Xu <peterx@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
2023-04-24 11:29:00 +02:00
Paolo Bonzini
512c90c90e qemu-coroutine: remove qatomic_mb_read()
Replace with an explicit barrier and a comment.

Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2023-04-20 11:17:35 +02:00
Peter Maydell
64f1c63d87 Fix use-after-free in util/error.c
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Merge tag 'pull_error_handle_fix_use_after_free.v1' of https://github.com/stefanberger/qemu-tpm into staging

Fix use-after-free in util/error.c

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* tag 'pull_error_handle_fix_use_after_free.v1' of https://github.com/stefanberger/qemu-tpm:
  util/error: Fix use-after-free errors reported by Coverity

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2023-04-10 11:47:40 +01:00
Stefan Berger
cc40b8b844 util/error: Fix use-after-free errors reported by Coverity
Fix use-after-free errors in the code path that called error_handle(). A
call to error_handle() will now either free the passed Error 'err' or
assign it to '*errp' if '*errp' is currently NULL. This ensures that 'err'
either has been freed or is assigned to '*errp' if this function returns.
Adjust the two callers of this function to not assign the 'err' to '*errp'
themselves, since this is now handled by error_handle().

Fixes: commit 3ffef1a55c ("error: add global &error_warn destination")
Signed-off-by: Stefan Berger <stefanb@linux.ibm.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-id: 20230406154347.4100700-1-stefanb@linux.ibm.com
2023-04-06 12:38:42 -04:00
Emilio Cota
1ff4a81bd3 tcg: use QTree instead of GTree
qemu-user can hang in a multi-threaded fork. One common
reason is that when creating a TB, between fork and exec
we manipulate a GTree whose memory allocator (GSlice) is
not fork-safe.

Although POSIX does not mandate it, the system's allocator
(e.g. tcmalloc, libc malloc) is probably fork-safe.

Fix some of these hangs by using QTree, which uses the system's
allocator regardless of the Glib version that we used at
configuration time.

Tested with the test program in the original bug report, i.e.:
```

void garble() {
  int pid = fork();
  if (pid == 0) {
    exit(0);
  } else {
    int wstatus;
    waitpid(pid, &wstatus, 0);
  }
}

void supragarble(unsigned depth) {
  if (depth == 0)
    return ;

  std::thread a(supragarble, depth-1);
  std::thread b(supragarble, depth-1);
  garble();
  a.join();
  b.join();
}

int main() {
  supragarble(10);
}
```

Resolves: https://gitlab.com/qemu-project/qemu/-/issues/285
Reported-by: Valentin David <me@valentindavid.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Emilio Cota <cota@braap.org>
Message-Id: <20230205163758.416992-3-cota@braap.org>
[rth: Add QEMU_DISABLE_CFI for all callback using functions.]
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-03-28 15:23:10 -07:00
Emilio Cota
e3feb2cc22 util: import GTree as QTree
The only reason to add this implementation is to control the memory allocator
used. Some users (e.g. TCG) cannot work reliably in multi-threaded
environments (e.g. forking in user-mode) with GTree's allocator, GSlice.
See https://gitlab.com/qemu-project/qemu/-/issues/285 for details.

Importing GTree is a temporary workaround until GTree migrates away
from GSlice.

This implementation is identical to that in glib v2.75.0, except that
we don't import recent additions to the API nor deprecated API calls,
none of which are used in QEMU.

I've imported tests from glib and added a benchmark just to
make sure that performance is similar. Note: it cannot be identical
because (1) we are not using GSlice, (2) we use different compilation flags
(e.g. -fPIC) and (3) we're linking statically.

$ cat /proc/cpuinfo| grep 'model name' | head -1
model name      : AMD Ryzen 7 PRO 5850U with Radeon Graphics
$ echo '0' | sudo tee /sys/devices/system/cpu/cpufreq/boost
$ tests/bench/qtree-bench

 Tree         Op      32            1024            4096          131072         1048576
------------------------------------------------------------------------------------------------
GTree     Lookup   83.23           43.08           25.31           19.40           16.22
QTree     Lookup  113.42 (1.36x)   53.83 (1.25x)   28.38 (1.12x)   17.64 (0.91x)   13.04 (0.80x)
GTree     Insert   44.23           29.37           25.83           19.49           17.03
QTree     Insert   46.87 (1.06x)   25.62 (0.87x)   24.29 (0.94x)   16.83 (0.86x)   12.97 (0.76x)
GTree     Remove   53.27           35.15           31.43           24.64           16.70
QTree     Remove   57.32 (1.08x)   41.76 (1.19x)   38.37 (1.22x)   29.30 (1.19x)   15.07 (0.90x)
GTree  RemoveAll  135.44          127.52          126.72          120.11           64.34
QTree  RemoveAll  127.15 (0.94x)  110.37 (0.87x)  107.97 (0.85x)   97.13 (0.81x)   55.10 (0.86x)
GTree   Traverse  277.71          276.09          272.78          246.72           98.47
QTree   Traverse  370.33 (1.33x)  411.97 (1.49x)  400.23 (1.47x)  262.82 (1.07x)   78.52 (0.80x)
------------------------------------------------------------------------------------------------

As a sanity check, the same benchmark when Glib's version
is >= $glib_dropped_gslice_version (i.e. QTree == GTree):

 Tree         Op      32            1024            4096          131072         1048576
------------------------------------------------------------------------------------------------
GTree     Lookup   82.72           43.09           24.18           19.73           16.09
QTree     Lookup   81.82 (0.99x)   43.10 (1.00x)   24.20 (1.00x)   19.76 (1.00x)   16.26 (1.01x)
GTree     Insert   45.07           29.62           26.34           19.90           17.18
QTree     Insert   45.72 (1.01x)   29.60 (1.00x)   26.38 (1.00x)   19.71 (0.99x)   17.20 (1.00x)
GTree     Remove   54.48           35.36           31.77           24.97           16.95
QTree     Remove   54.46 (1.00x)   35.32 (1.00x)   31.77 (1.00x)   24.91 (1.00x)   17.15 (1.01x)
GTree  RemoveAll  140.68          127.36          125.43          121.45           68.20
QTree  RemoveAll  140.65 (1.00x)  127.64 (1.00x)  125.01 (1.00x)  121.73 (1.00x)   67.06 (0.98x)
GTree   Traverse  278.68          276.05          266.75          251.65          104.93
QTree   Traverse  278.31 (1.00x)  275.78 (1.00x)  266.42 (1.00x)  247.89 (0.99x)  104.58 (1.00x)
------------------------------------------------------------------------------------------------

Signed-off-by: Emilio Cota <cota@braap.org>
Message-Id: <20230205163758.416992-2-cota@braap.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-03-28 15:23:10 -07:00
Stefan Hajnoczi
e62da98527 aio-posix: fix race between epoll upgrade and aio_set_fd_handler()
If another thread calls aio_set_fd_handler() while the IOThread event
loop is upgrading from ppoll(2) to epoll(7) then we might miss new
AioHandlers. The epollfd will not monitor the new AioHandler's fd,
resulting in hangs.

Take the AioHandler list lock while upgrading to epoll. This prevents
AioHandlers from changing while epoll is being set up. If we cannot lock
because we're in a nested event loop, then don't upgrade to epoll (it
will happen next time we're not in a nested call).

The downside to taking the lock is that the aio_set_fd_handler() thread
has to wait until the epoll upgrade is finished, which involves many
epoll_ctl(2) system calls. However, this scenario is rare and I couldn't
think of another solution that is still simple.

Reported-by: Qing Wang <qinwang@redhat.com>
Buglink: https://bugzilla.redhat.com/show_bug.cgi?id=2090998
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Fam Zheng <fam@euphon.net>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-Id: <20230323144859.1338495-1-stefanha@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2023-03-27 15:12:17 +02:00
Stefan Hajnoczi
2957dc40a2 block/export: only acquire AioContext once for vhost_user_server_stop()
vhost_user_server_stop() uses AIO_WAIT_WHILE(). AIO_WAIT_WHILE()
requires that AioContext is only acquired once.

Since blk_exp_request_shutdown() already acquires the AioContext it
shouldn't be acquired again in vhost_user_server_stop().

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-Id: <20230323145853.1345527-1-stefanha@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2023-03-27 13:46:30 +02:00
Marc-André Lureau
f3ab43accf win32: add qemu_close_socket_osfhandle()
Close the given file descriptor, but returns the underlying SOCKET.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <20230320133643.1618437-2-marcandre.lureau@redhat.com>
2023-03-21 11:16:03 +04:00
Yeqi Fu
48805df9c2 replace TABs with spaces
Bring the files in line with the QEMU coding style, with spaces
for indentation.

Resolves: https://gitlab.com/qemu-project/qemu/-/issues/378
Signed-off-by: Yeqi Fu <fufuyqqqqqq@gmail.com>
Message-Id: <20230315032649.57568-1-fufuyqqqqqq@gmail.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
2023-03-20 12:43:50 +01:00
Marc-André Lureau
0a237f4de4 osdep: implement qemu_socketpair() for win32
Manually implement a socketpair() function, using UNIX sockets and
simple peer credential checking.

QEMU doesn't make much use of socketpair, beside vhost-user which is not
available for win32 at this point. However, I intend to use it for
writing some new portable tests.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <20230306122751.2355515-5-marcandre.lureau@redhat.com>
2023-03-13 15:39:31 +04:00
Marc-André Lureau
25657fc6c1 win32: replace closesocket() with close() wrapper
Use a close() wrapper instead, so that we don't need to worry about
closesocket() vs close() anymore, let's hope.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Stefan Berger <stefanb@linux.ibm.com>
Message-Id: <20230221124802.4103554-17-marcandre.lureau@redhat.com>
2023-03-13 15:39:31 +04:00
Marc-André Lureau
abe34282b0 win32: avoid mixing SOCKET and file descriptor space
Until now, a win32 SOCKET handle is often cast to an int file
descriptor, as this is what other OS use for sockets. When necessary,
QEMU eventually queries whether it's a socket with the help of
fd_is_socket(). However, there is no guarantee of conflict between the
fd and SOCKET space. Such conflict would have surprising consequences,
we shouldn't mix them.

Also, it is often forgotten that SOCKET must be closed with
closesocket(), and not close().

Instead, let's make the win32 socket wrapper functions return and take a
file descriptor, and let util/ wrappers do the fd/SOCKET conversion as
necessary. A bit of adaptation is necessary in io/ as well.

Unfortunately, we can't drop closesocket() usage, despite
_open_osfhandle() documentation claiming transfer of ownership, testing
shows bad behaviour if you forget to call closesocket().

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Stefan Berger <stefanb@linux.ibm.com>
Message-Id: <20230221124802.4103554-15-marcandre.lureau@redhat.com>
2023-03-13 15:39:31 +04:00
Marc-André Lureau
faa4ec1641 main-loop: remove qemu_fd_register(), win32/slirp/socket specific
Open-code the socket registration where it's needed, to avoid
artificially used or unclear generic interface.

Furthermore, the following patches are going to make socket handling use
FD-only inside QEMU, but we need to handle win32 SOCKET from libslirp.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Stefan Berger <stefanb@linux.ibm.com>
Message-Id: <20230221124802.4103554-12-marcandre.lureau@redhat.com>
2023-03-13 15:39:31 +04:00
Marc-André Lureau
e2a3a2193e aio/win32: aio_set_fd_handler() only supports SOCKET
Let's check if the argument is actually a SOCKET, else report an error
and return.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Stefan Berger <stefanb@linux.ibm.com>
Message-Id: <20230221124802.4103554-10-marcandre.lureau@redhat.com>
2023-03-13 15:23:37 +04:00
Marc-André Lureau
6eeef4477a aio: make aio_set_fd_poll() static to aio-posix.c
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Stefan Berger <stefanb@linux.ibm.com>
Message-Id: <20230221124802.4103554-9-marcandre.lureau@redhat.com>
2023-03-13 15:23:37 +04:00
Marc-André Lureau
a4aafea261 win32/socket: introduce qemu_socket_unselect() helper
A more explicit version of qemu_socket_select() with no events.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Stefan Berger <stefanb@linux.ibm.com>
Message-Id: <20230221124802.4103554-8-marcandre.lureau@redhat.com>
2023-03-13 15:23:37 +04:00
Marc-André Lureau
f5fd677ae7 win32/socket: introduce qemu_socket_select() helper
This is a wrapper for WSAEventSelect, with Error handling. By default,
it will produce a warning, so callers don't have to be modified
now, and yet we can spot potential mis-use.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Stefan Berger <stefanb@linux.ibm.com>
Message-Id: <20230221124802.4103554-7-marcandre.lureau@redhat.com>
2023-03-13 15:23:37 +04:00
Marc-André Lureau
3ffef1a55c error: add global &error_warn destination
This can help debugging issues or develop, when error handling is
introduced.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Stefan Berger <stefanb@linux.ibm.com>
Message-Id: <20230221124802.4103554-6-marcandre.lureau@redhat.com>
2023-03-13 15:23:37 +04:00
Marc-André Lureau
8278e30c45 util: drop qemu_fork()
Fortunately, qemu_fork() is no longer used since commit
a95570e3e4 ("io/command: use glib GSpawn, instead of open-coding
fork/exec"). (GSpawn uses posix_spawn() whenever possible instead)

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <20230221124802.4103554-2-marcandre.lureau@redhat.com>
2023-03-13 15:23:37 +04:00
Peter Maydell
555ce1d855 MIPS (and few misc) patches
- MIPS
   - Remove obsolete "mips" board from target-mips.rst
   - Fix JALS32/J32/SWM32 instructions for microMIPS
   - Fix CP0.Config7.WII handling on pre-R6 cores
 
 - HW
   - Revert "Remove intermediate IRQ forwarder" commits
   - Implement legacy LTIM Edge/Level Bank Select in Intel 8259 INTC
   - Improve PCI IRQ routing in VT82C686 / Pegasos II
   - Basic implementation of VIA AC97 audio playback
   - Implement 'resume on connection status change' in USB OHCI
 
 - UI
   - Override windowDidResignKey
 
 - memory
   - Dump HPA and access type in HMP 'info ramblock'
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Merge tag 'mips-misc-20230308' of https://github.com/philmd/qemu into staging

MIPS (and few misc) patches

- MIPS
  - Remove obsolete "mips" board from target-mips.rst
  - Fix JALS32/J32/SWM32 instructions for microMIPS
  - Fix CP0.Config7.WII handling on pre-R6 cores

- HW
  - Revert "Remove intermediate IRQ forwarder" commits
  - Implement legacy LTIM Edge/Level Bank Select in Intel 8259 INTC
  - Improve PCI IRQ routing in VT82C686 / Pegasos II
  - Basic implementation of VIA AC97 audio playback
  - Implement 'resume on connection status change' in USB OHCI

- UI
  - Override windowDidResignKey

- memory
  - Dump HPA and access type in HMP 'info ramblock'

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# gpg:                using RSA key FAABE75E12917221DCFD6BB2E3E32C2CDEADC0DE
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# 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: FAAB E75E 1291 7221 DCFD  6BB2 E3E3 2C2C DEAD C0DE

* tag 'mips-misc-20230308' of https://github.com/philmd/qemu:
  log: Remove unneeded new line
  memory: Dump HPA and access type of ramblocks
  ui/cocoa: Override windowDidResignKey
  hw/usb/ohci: Implement resume on connection status change
  hw/audio/via-ac97: Basic implementation of audio playback
  hw/usb/vt82c686-uhci-pci: Use PCI IRQ routing
  hw/ppc/pegasos2: Fix PCI interrupt routing
  hw/isa/vt82c686: Implement PCI IRQ routing
  hw/intc/i8259: Implement legacy LTIM Edge/Level Bank Select
  hw/display/sm501: Add debug property to control pixman usage
  Revert "hw/isa/vt82c686: Remove intermediate IRQ forwarder"
  Revert "hw/isa/i82378: Remove intermediate IRQ forwarder"
  hw/mips/itu: Pass SAAR using QOM link property
  hw/mips: Declare all length properties as unsigned
  target/mips: Set correct CP0.Config[4, 5] values for M14K(c)
  target/mips: Implement CP0.Config7.WII bit support
  target/mips: Fix SWM32 handling for microMIPS
  target/mips: Fix JALS32/J32 instruction handling for microMIPS
  target/mips: Replace [g_]assert(0) -> g_assert_not_reached()
  docs/system: Remove "mips" board from target-mips.rst

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2023-03-09 10:22:50 +00:00
BALATON Zoltan
cb9291e550 log: Remove unneeded new line
The help text of the -d plugin option has a new line at the end which
is not needed as one is added automatically. Fixing it removes the
unexpected empty line in -d help output.

Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-Id: <20230119214033.600FB74645F@zero.eik.bme.hu>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
2023-03-08 00:37:48 +01:00
Peter Maydell
7b0f0aa55f * Fix missing memory barriers
* Fix comments about memory ordering
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Merge tag 'for-upstream-mb' of https://gitlab.com/bonzini/qemu into staging

* Fix missing memory barriers
* Fix comments about memory ordering

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# gpg: Signature made Tue 07 Mar 2023 11:40:26 GMT
# 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
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* tag 'for-upstream-mb' of https://gitlab.com/bonzini/qemu:
  async: clarify usage of barriers in the polling case
  async: update documentation of the memory barriers
  physmem: add missing memory barrier
  qemu-coroutine-lock: add smp_mb__after_rmw()
  aio-wait: switch to smp_mb__after_rmw()
  edu: add smp_mb__after_rmw()
  qemu-thread-win32: cleanup, fix, document QemuEvent
  qemu-thread-posix: cleanup, fix, document QemuEvent
  qatomic: add smp_mb__before/after_rmw()

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2023-03-07 17:02:06 +00:00
Paolo Bonzini
6229438cca async: clarify usage of barriers in the polling case
Explain that aio_context_notifier_poll() relies on
aio_notify_accept() to catch all the memory writes that were
done before ctx->notified was set to true.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2023-03-07 12:39:53 +01:00
Paolo Bonzini
8dd48650b4 async: update documentation of the memory barriers
Ever since commit 8c6b0356b5 ("util/async: make bh_aio_poll() O(1)",
2020-02-22), synchronization between qemu_bh_schedule() and aio_bh_poll()
is happening when the bottom half is enqueued in the bh_list; not
when the flags are set.  Update the documentation to match.

Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2023-03-07 12:39:53 +01:00
Paolo Bonzini
e3a3b6ec81 qemu-coroutine-lock: add smp_mb__after_rmw()
mutex->from_push and mutex->handoff in qemu-coroutine-lock implement
the familiar pattern:

   write a                                  write b
   smp_mb()                                 smp_mb()
   read b                                   read a

The memory barrier is required by the C memory model even after a
SEQ_CST read-modify-write operation such as QSLIST_INSERT_HEAD_ATOMIC.
Add it and avoid the unclear qatomic_mb_read() operation.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2023-03-07 12:39:53 +01:00
Paolo Bonzini
6c5df4b48f qemu-thread-win32: cleanup, fix, document QemuEvent
QemuEvent is currently broken on ARM due to missing memory barriers
after qatomic_*().  Apart from adding the memory barrier, a closer look
reveals some unpaired memory barriers that are not really needed and
complicated the functions unnecessarily.  Also, it is relying on
a memory barrier in ResetEvent(); the barrier _ought_ to be there
but there is really no documentation about it, so make it explicit.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2023-03-07 12:38:40 +01:00
Paolo Bonzini
9586a1329f qemu-thread-posix: cleanup, fix, document QemuEvent
QemuEvent is currently broken on ARM due to missing memory barriers
after qatomic_*().  Apart from adding the memory barrier, a closer look
reveals some unpaired memory barriers too.  Document more clearly what
is going on.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2023-03-07 12:38:40 +01:00
Richard Henderson
5d133dd839 include/qemu/cpuid: Introduce xgetbv_low
Replace the two uses of asm to expand xgetbv with an inline function.
Since one of the two has been using the mnemonic, assume that the
comment about "older versions of the assember" is obsolete, as even
that is 4 years old.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-03-05 13:44:07 -08:00
Philippe Mathieu-Daudé
5b5968c477 replay: Extract core API to 'exec/replay-core.h'
replay API is used deeply within TCG common code (common to user
and system emulation). Unfortunately "sysemu/replay.h" requires
some QAPI headers for few system-specific declarations, example:

  void replay_input_event(QemuConsole *src, InputEvent *evt);

Since commit c2651c0eaa ("qapi/meson: Restrict UI module to system
emulation and tools") the QAPI header defining the InputEvent is
not generated anymore.
To keep it simple, extract the 'core' replay prototypes to a new
"exec/replay-core.h" header which we include in the TCG code that
doesn't need the rest of the replay API.

Reviewed-by: Pavel Dovgalyuk <Pavel.Dovgalyuk@ispras.ru>
Message-Id: <20221219170806.60580-5-philmd@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
2023-02-27 22:29:01 +01:00
Khadija Kamran
0c201cc17f Updated the FSF address to <https://www.gnu.org/licenses/>
The Free Software Foundation moved to a new address and some
sources in QEMU referred to their old location.
The address should be updated and replaced by a pointer to
<https://www.gnu.org/licenses/>

Resolves: https://gitlab.com/qemu-project/qemu/-/issues/379
Signed-off-by: Khadija Kamran <kkamran.bese16seecs@seecs.edu.pk>
Message-Id: <576ee9203fdac99d7251a98faa66b9ce1e7febc5.1675941486.git.kkamran.bese16seecs@seecs.edu.pk>
Reviewed-by: Stefan Weil <sw@weilnetz.de>
Signed-off-by: Thomas Huth <thuth@redhat.com>
2023-02-27 09:15:39 +01:00
Peter Maydell
c259930c2e Error reporting patches patches for 2023-02-23
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Merge tag 'pull-error-2023-02-23' of https://repo.or.cz/qemu/armbru into staging

Error reporting patches patches for 2023-02-23

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# gpg: Signature made Thu 23 Feb 2023 13:13:44 GMT
# gpg:                using RSA key 354BC8B3D7EB2A6B68674E5F3870B400EB918653
# gpg:                issuer "armbru@redhat.com"
# gpg: Good signature from "Markus Armbruster <armbru@redhat.com>" [full]
# gpg:                 aka "Markus Armbruster <armbru@pond.sub.org>" [full]
# Primary key fingerprint: 354B C8B3 D7EB 2A6B 6867  4E5F 3870 B400 EB91 8653

* tag 'pull-error-2023-02-23' of https://repo.or.cz/qemu/armbru:
  rocker: Tweak stubbed out monitor commands' error messages
  migration/colo: Improve an x-colo-lost-heartbeat error message
  hw/core: Improve the query-hotpluggable-cpus error message
  replay: Simplify setting replay blockers
  qga: Drop dangling reference to QERR_QGA_LOGGING_DISABLED
  hw/acpi: Move QMP command to hw/core/
  hw/acpi: Dumb down acpi_table_add() stub
  hw/smbios: Dumb down smbios_entry_add() stub
  hw/core: Improve error message when machine doesn't provide NMIs
  dump: Assert cpu_get_note_size() can't fail
  dump: Improve error message when target doesn't support memory dump
  error: Drop superfluous #include "qapi/qmp/qerror.h"

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2023-02-24 15:08:51 +00:00
Peter Maydell
3f21065f09 * x86 bugfixes
* OpenBSD support for naming threads
 * Refined Python support policy
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Merge tag 'for-upstream' of https://gitlab.com/bonzini/qemu into staging

* x86 bugfixes
* OpenBSD support for naming threads
* Refined Python support policy

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# gpg: Signature made Tue 21 Feb 2023 13:10:49 GMT
# 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:
  target/i386/gdbstub: Fix a bug about order of FPU stack in 'g' packets.
  docs: build-platforms: refine requirements on Python build dependencies
  thread-posix: add support for setting threads name on OpenBSD
  target/i386: Fix 32-bit AD[CO]X insns in 64-bit mode

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2023-02-24 12:46:59 +00:00
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
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
Andrey Zhadchenko
a4d5224c2c hbitmap: fix hbitmap_status() return value for first dirty bit case
The last return statement should return true, as we already evaluated that
start == next_dirty

Also, fix hbitmap_status() description in header

Cc: qemu-stable@nongnu.org
Fixes: a6426475a7 ("block/dirty-bitmap: introduce bdrv_dirty_bitmap_status()")
Signed-off-by: Andrey Zhadchenko <andrey.zhadchenko@virtuozzo.com>
Message-Id: <20230202181523.423131-1-andrey.zhadchenko@virtuozzo.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2023-02-17 14:34:24 +01:00
Emanuele Giuseppe Esposito
deb9c2ad0b util/qemu-thread-posix: use TSA_NO_TSA to suppress clang TSA warnings in FreeBSD
FreeBSD implements pthread headers using TSA (thread safety analysis)
annotations, therefore when an application is compiled with
-Wthread-safety there are some locking/annotation requirements that the
user of the pthread API has to follow.

This will also be the case in QEMU, since util/qemu-thread-posix.c uses
the pthread API. Therefore when building it with -Wthread-safety, the
compiler will throw warnings because the functions are not properly
annotated. We need TSA to be enabled because it ensures that the
critical sections of an annotated variable are properly locked.

In order to make the compiler happy and avoid adding all the necessary
macros to all callers (lock functions should use TSA_ACQUIRE, while
unlock TSA_RELEASE, and this applies to all users of pthread_mutex_lock
and pthread_mutex_unlock), simply use TSA_NO_TSA to supppress such
warnings.

Signed-off-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Message-Id: <20230117135203.3049709-2-eesposit@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2023-02-17 11:22:19 +01:00
Brad Smith
3ada67a306 thread-posix: add support for setting threads name on OpenBSD
Make use of pthread_set_name_np() to be able to set the threads name
on OpenBSD.

Signed-off-by: Brad Smith <brad@comstyle.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <Y57NrCmPTVSXLWC4@humpty.home.comstyle.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2023-02-17 09:56:34 +01:00
Thomas Huth
5feed38c21 Do not include "qemu/error-report.h" in headers that do not need it
Include it in the .c files instead that use the error reporting
functions.

Message-Id: <20230210111931.1115489-1-thuth@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Thomas Huth <thuth@redhat.com>
2023-02-14 09:11:27 +01:00
Peter Xu
c40c046341 util/userfaultfd: Support /dev/userfaultfd
Teach QEMU to use /dev/userfaultfd when it existed and fallback to the
system call if either it's not there or doesn't have enough permission.

Firstly, as long as the app has permission to access /dev/userfaultfd, it
always have the ability to trap kernel faults which QEMU mostly wants.
Meanwhile, in some context (e.g. containers) the userfaultfd syscall can be
forbidden, so it can be the major way to use postcopy in a restricted
environment with strict seccomp setup.

Signed-off-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
2023-02-11 16:51:09 +01:00
Markus Armbruster
a67dfa660b Drop duplicate #include
Tracked down with the help of scripts/clean-includes.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Acked-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Greg Kurz <groug@kaod.org>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Message-Id: <20230202133830.2152150-21-armbru@redhat.com>
2023-02-08 07:28:05 +01:00
Markus Armbruster
bfe7bf8590 Don't include headers already included by qemu/osdep.h
This commit was created with scripts/clean-includes.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Acked-by: Christian Schoenebeck <qemu_oss@crudebyte.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Message-Id: <20230202133830.2152150-19-armbru@redhat.com>
2023-02-08 07:28:05 +01:00
Markus Armbruster
2ca10faeb8 Fix non-first inclusions of qemu/osdep.h
This commit was created with scripts/clean-includes.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Message-Id: <20230202133830.2152150-18-armbru@redhat.com>
2023-02-08 07:28:05 +01:00