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Kernel: Sandbox each GPU3DDevice file description into own host context

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This commit is contained in:
Sahan Fernando 2022-03-10 13:04:48 +11:00 • committed by Ali Mohammad Pur
parent fe7d801dd9
commit 683de841e5
4 changed files with 70 additions and 7 deletions
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25
Kernel/Graphics/VirtIOGPU/GPU3DDevice.h
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@ -91,6 +91,27 @@ public:
GPU3DDevice() = delete;
explicit GPU3DDevice(GraphicsAdapter& graphics_adapter);
class PerContextState : public RefCounted<PerContextState> {
public:
static ErrorOr<RefPtr<PerContextState>> try_create(ContextID context_id)
{
auto region_result = TRY(MM.allocate_kernel_region(
NUM_TRANSFER_REGION_PAGES * PAGE_SIZE,
"VIRGL3D userspace upload buffer",
Memory::Region::Access::ReadWrite,
AllocationStrategy::AllocateNow));
return TRY(adopt_nonnull_ref_or_enomem(new (nothrow) PerContextState(context_id, move(region_result))));
}
ContextID context_id() { return m_context_id; }
Memory::Region& transfer_buffer_region() { return *m_transfer_buffer_region; }
private:
PerContextState() = delete;
explicit PerContextState(ContextID context_id, OwnPtr<Memory::Region> transfer_buffer_region);
ContextID m_context_id;
OwnPtr<Memory::Region> m_transfer_buffer_region;
};
virtual bool can_read(const OpenFileDescription&, u64) const override { return true; }
virtual bool can_write(const OpenFileDescription&, u64) const override { return true; }
virtual ErrorOr<size_t> read(OpenFileDescription&, u64, UserOrKernelBuffer&, size_t) override { return ENOTSUP; }
@ -98,11 +119,15 @@ public:
virtual StringView class_name() const override { return "virgl3d"; }
virtual ErrorOr<void> ioctl(OpenFileDescription&, unsigned request, Userspace<void*> arg) override;
virtual void detach(OpenFileDescription&) override;
private:
ErrorOr<RefPtr<PerContextState>> get_context_for_description(OpenFileDescription&);
Kernel::Graphics::VirtIOGPU::GraphicsAdapter& m_graphics_adapter;
// Context used for kernel operations (e.g. flushing resources to scanout)
ContextID m_kernel_context_id;
HashMap<RefPtr<OpenFileDescription>, RefPtr<PerContextState>> m_context_state_lookup;
// Memory management for backing buffers
OwnPtr<Memory::Region> m_transfer_buffer_region;
constexpr static size_t NUM_TRANSFER_REGION_PAGES = 256;