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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>
16 lines
303 B
Meson
16 lines
303 B
Meson
specific_ss.add(files('accel-common.c', 'accel-blocker.c'))
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softmmu_ss.add(files('accel-softmmu.c'))
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user_ss.add(files('accel-user.c'))
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subdir('tcg')
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if have_system
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subdir('hvf')
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subdir('qtest')
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subdir('kvm')
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subdir('xen')
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subdir('stubs')
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endif
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# qtest
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softmmu_ss.add(files('dummy-cpus.c'))
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