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Kernel: Support multiport for VirtIOConsole

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This involves refactoring VirtIOConsole into VirtIOConsole and
VirtIOConsolePort. VirtIOConsole is the VirtIODevice, it owns multiple
VirtIOConsolePorts as well as two control queues. Each
VirtIOConsolePort is a CharacterDevice.
This commit is contained in:
x-yl 2021-06-23 15:19:24 +04:00 • committed by Ali Mohammad Pur
parent 1492bb2fd6
commit 1fe08759e3
6 changed files with 419 additions and 126 deletions
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3
Kernel/VM/RingBuffer.h
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@ -8,6 +8,7 @@
#include <AK/String.h>
#include <Kernel/PhysicalAddress.h>
#include <Kernel/UserOrKernelBuffer.h>
namespace Kernel {
@ -25,6 +26,8 @@ public:
SpinLock<u8>& lock() { return m_lock; }
size_t used_bytes() const { return m_num_used_bytes; }
PhysicalAddress start_of_region() const { return m_region->physical_page(0)->paddr(); }
VirtualAddress vaddr() const { return m_region->vaddr(); }
size_t bytes_till_end() const { return (m_capacity_in_bytes - ((m_start_of_used + m_num_used_bytes) % m_capacity_in_bytes)) % m_capacity_in_bytes; };
private:
OwnPtr<Region> m_region;