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Kernel: Activate queues and enable interrutps in VirtIODevices

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This patch actually enables virtio queues after configuring them
so the device can use them, it also enables interrupt handling in
VirtIODevice so they are not ignored.

Co-authored-by: Sahan <sahan.h.fernando@gmail.com>
This commit is contained in:
Idan Horowitz 2021-04-15 19:17:49 +10:00 • committed by Andreas Kling
parent 4a467c553a
commit 42b1eb5af1
4 changed files with 30 additions and 6 deletions
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3
Kernel/VirtIO/VirtIOQueue.cpp
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@ -77,10 +77,11 @@ bool VirtIOQueue::supply_buffer(const u8* buffer, u32 len, BufferType buffer_typ
m_free_buffers--;
m_free_head = (m_free_head + 1) % m_queue_size;
m_driver->rings[m_driver->index % m_queue_size] = descriptor_index;
m_driver->rings[m_driver_index_shadow % m_queue_size] = descriptor_index; // m_driver_index_shadow is used to prevent accesses to index before the rings are updated
full_memory_barrier();
m_driver_index_shadow++;
m_driver->index++;
full_memory_barrier();