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56 lines
1.6 KiB
C++
56 lines
1.6 KiB
C++
/*
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* Copyright (c) 2021, Liav A. <liavalb@hotmail.co.il>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <Kernel/Devices/HID/VMWareMouseDevice.h>
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#include <Kernel/Devices/VMWareBackdoor.h>
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#include <Kernel/Sections.h>
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namespace Kernel {
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UNMAP_AFTER_INIT RefPtr<VMWareMouseDevice> VMWareMouseDevice::try_to_initialize(const I8042Controller& ps2_controller)
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{
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if (!VMWareBackdoor::the())
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return {};
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if (!VMWareBackdoor::the()->vmmouse_is_absolute())
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return {};
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auto device = adopt_ref(*new VMWareMouseDevice(ps2_controller));
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if (device->initialize())
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return device;
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return {};
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}
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void VMWareMouseDevice::irq_handle_byte_read(u8)
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{
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VERIFY(VMWareBackdoor::the());
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VERIFY(VMWareBackdoor::the()->vmmouse_is_absolute());
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// We won't receive complete packets with the backdoor enabled,
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// we will only get one byte for each event, which we'll just
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// discard. If we were to wait until we *think* that we got a
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// full PS/2 packet then we would create a backlog in the VM
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// because we wouldn't read the appropriate number of mouse
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// packets from VMWareBackdoor.
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auto mouse_packet = VMWareBackdoor::the()->receive_mouse_packet();
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if (mouse_packet.has_value()) {
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m_entropy_source.add_random_event(mouse_packet.value());
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{
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ScopedSpinLock lock(m_queue_lock);
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m_queue.enqueue(mouse_packet.value());
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}
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evaluate_block_conditions();
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}
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return;
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}
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VMWareMouseDevice::VMWareMouseDevice(const I8042Controller& ps2_controller)
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: PS2MouseDevice(ps2_controller)
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{
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}
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VMWareMouseDevice::~VMWareMouseDevice()
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{
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}
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}
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