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