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| author | Emanuele Giuseppe Esposito <eesposit@redhat.com> | 2022-11-11 10:47:56 -0500 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2023-01-11 09:59:39 +0100 |
| commit | bd688fc93120fb3e28aa70e3dfdf567ccc1e0bc1 (patch) | |
| tree | d763c7b30c195a31dedf67d708b7d770fd16b5ef /util | |
| parent | b585edca34a817fdb751dfe94fbd3cde32ffe60d (diff) | |
| download | qemu-bd688fc93120fb3e28aa70e3dfdf567ccc1e0bc1.zip qemu-bd688fc93120fb3e28aa70e3dfdf567ccc1e0bc1.tar.gz qemu-bd688fc93120fb3e28aa70e3dfdf567ccc1e0bc1.tar.bz2 | |
accel: introduce accelerator blocker API
This API allows the accelerators to prevent vcpus from issuing
new ioctls while execting a critical section marked with the
accel_ioctl_inhibit_begin/end functions.
Note that all functions submitting ioctls must mark where the
ioctl is being called with accel_{cpu_}ioctl_begin/end().
This API requires the caller to always hold the BQL.
API documentation is in sysemu/accel-blocker.h
Internally, it uses a QemuLockCnt together with a per-CPU QemuLockCnt
(to minimize cache line bouncing) to keep avoid that new ioctls
run when the critical section starts, and a QemuEvent to wait
that all running ioctls finish.
Signed-off-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-Id: <20221111154758.1372674-2-eesposit@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'util')
| -rw-r--r-- | util/meson.build | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/util/meson.build b/util/meson.build index d8d109f..26c73e5 100644 --- a/util/meson.build +++ b/util/meson.build @@ -58,6 +58,7 @@ util_ss.add(files('yank.c')) util_ss.add(files('int128.c')) util_ss.add(files('memalign.c')) util_ss.add(files('interval-tree.c')) +util_ss.add(files('lockcnt.c')) if have_user util_ss.add(files('selfmap.c')) @@ -72,7 +73,6 @@ endif if have_block or have_ga util_ss.add(files('aiocb.c', 'async.c')) util_ss.add(files('base64.c')) - util_ss.add(files('lockcnt.c')) util_ss.add(files('main-loop.c')) util_ss.add(files('qemu-coroutine.c', 'qemu-coroutine-lock.c', 'qemu-coroutine-io.c')) util_ss.add(files('coroutine-@0@.c'.format(config_host['CONFIG_COROUTINE_BACKEND']))) |