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    • 1. 发明申请
    • Infrastructure Support for Accelerated Processing Device Memory Paging Without Operating System Integration
    • 基础设施支持加速处理设备内存寻呼,无需操作系统集成
    • US20130159664A1
    • 2013-06-20
    • US13325282
    • 2011-12-14
    • Paul BLINZERLeendert Peter Van DoornGongxian Jeffrey ChengElene TerryThomas Roy WollerArshad Rahman
    • Paul BLINZERLeendert Peter Van DoornGongxian Jeffrey ChengElene TerryThomas Roy WollerArshad Rahman
    • G06F12/10
    • G06F12/1009G06F9/3004G06F9/3881G06F12/1081G06F2009/3883G06F2212/683
    • In a CPU of the combined CPU/APD architecture system, the CPU having multiple CPU cores, each core having a first machine specific register for receiving a physical page table/page directory base address, a second machine specific register for receiving a physical address pointing to a location controlled by an IOMMUv2 that is communicatively coupled to an APD, and microcode which when executed causes a write notification to be issued to the physical address contained in the second machine specific register; receiving in the first machine specific register of a CPU core, a physical page table/page directory base address, receiving in the second machine specific register of the CPU core, a physical address pointing to a location controlled by the IOMMUv2, determining that a control register of the CPU core has been updated, and responsive to the determination that the control register has been updated, executing microcode in the CPU core that causes a write notification to be issued to the physical address contained in the second machine specific register, wherein the physical address is able to receive writes that affect IOMMUv2 page table invalidations.
    • 在组合的CPU / APD架构系统的CPU中,CPU具有多个CPU内核,每个核具有用于接收物理页表/页目录基地址的第一机器特定寄存器,用于接收物理地址指向 到由通信地耦合到APD的IOMMUv2控制的位置,以及当被执行时导致向包含在第二机器特定寄存器中的物理地址发出写入通知的微代码; 在CPU核心的第一机器特定寄存器中接收物理页表/页目录基地址,在CPU核心的第二机器特定寄存器中接收指向由IOMMUv2控制的位置的物理地址,确定控制 已经更新了CPU核心的寄存器,并且响应于控制寄存器被更新的确定,执行CPU核心中的微代码,使得向第二机器特定寄存器中包含的物理地址发出写入通知,其中, 物理地址能够接收影响IOMMUv2页表无效的写入。