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    • 4. 发明授权
    • Apparatus for protecting memory storage blocks from I/O accesses
    • 用于保护存储器存储块免受I / O访问的装置
    • US5900019A
    • 1999-05-04
    • US652079
    • 1996-05-23
    • Paul Gregory GreensteinRichard Roland GuyetteJohn Ted Rodell
    • Paul Gregory GreensteinRichard Roland GuyetteJohn Ted Rodell
    • G06F12/14
    • G06F12/1475
    • Apparatus for protecting memory storage blocks (page frames) against unwanted I/O accesses, including I/O data transferred in an unwanted direction. I/O storage keys are provided in an I/O protection array. Each I/O key is comprised of one or two bits and is associated with a respective storage block in computer memory. If the array contains two bit I/O keys, each key has 4 settings for controlling I/O accesses to an associated storage block; which: 1) inhibit an I/O access in the input direction of I/O data flow, 2) inhibit an I/O access in the output direction of I/O data flow, 3) allow I/O accesses in both directions, or 4) prevent all I/O accesses. If the array contains single bit I/O storage keys, each key has two settings, which: 1) prevent all I/O accesses in the associated storage block, or 2) allow all I/O accesses in the associated block. No I/O program keys are needed for controlling this type of I/O protection, which avoids key comparison operations by the I/O access protection apparatus. Nevertheless, the use of the subject I/O protection apparatus does not prevent the use of apparatus for protecting the same storage blocks from unwanted accesses by central processors, which may use CPU storage keys. Such CPU storage keys may be contained in a hardware array, or may be contained in a virtual storage page table without having any hardware CPU storage key array. If desired, the subject I/O storage protection apparatus may be used without providing any CPU storage protection.
    • 用于保护存储器存储块(页面帧)以防止不期望的I / O访问的装置,包括以不希望的方向传送的I / O数据。 I / O存储键在I / O保护阵列中提供。 每个I / O密钥由一位或两位构成,并与计算机存储器中的相应存储块相关联。 如果阵列包含两个位I / O键,每个键都有4个设置用于控制对相关存储块的I / O访问; 其中:1)禁止I / O数据流输入方向的I / O访问,2)禁止I / O数据流输出方向的I / O访问,3)允许双向I / O访问 ,或4)防止所有I / O访问。 如果阵列包含单个位I / O存储键,则每个键都有两个设置,其中:1)防止相关存储块中的所有I / O访问,或2)允许相关块中的所有I / O访问。 不需要I / O程序键来控制这种类型的I / O保护,避免了I / O访问保护装置的关键比较操作。 然而,使用主体I / O保护装置并不妨碍使用用于保护相同存储块的装置免受中央处理器的不必要的访问,中央处理器可能使用CPU存储键。 这样的CPU存储密钥可以包含在硬件阵列中,或者可以包含在虚拟存储页表中,而不需要任何硬件CPU存储密钥阵列。 如果需要,可以使用主体I / O存储保护装置,而不提供任何CPU存储保护。
    • 7. 发明授权
    • Resource-capability-based method and system for handling service
processor requests
    • 基于资源能力的方法和处理服务处理器请求的系统
    • US5784617A
    • 1998-07-21
    • US758618
    • 1996-11-27
    • Paul Gregory GreensteinJohn Ted RodellMichael Allen Wright
    • Paul Gregory GreensteinJohn Ted RodellMichael Allen Wright
    • G06F9/50G06F13/14
    • G06F9/5027G06F2209/503G06F2209/509
    • A method and system are provided for executing a service processor request within a data processing system having one or more processors within a central processing complex, each of the processors within the central processing complex including allocatable processor resources. Each of the processors within the central processing complex is provided with the capability of processing selected service processor requests by reserving a portion of the allocatable processor resources within each of the processors for such purpose. A service processor request within the central processing complex is initially processed utilizing at least one of the processors in response to receiving a service processor request, if sufficient processor resources are available to process the service processor request within the reserved portion of the allocatable resources. Alternatively, the service processor request is transmitted to an external processing complex, if insufficient processor resources are available to process the service processor request within the reserved portion of the allocatable resources.
    • 提供了一种用于在具有中央处理复合体内的一个或多个处理器的数据处理系统内执行服务处理器请求的方法和系统,所述中央处理复合体中的每个处理器包括可分配的处理器资源。 中央处理复合体中的每个处理器具有处理所选择的服务处理器请求的能力,通过在每个处理器内预留一部分可分配处理器资源用于此目的。 如果足够的处理器资源可用于在可分配资源的保留部分内处理服务处理器请求,则响应于接收服务处理器请求,利用至少一个处理器来最初处理中央处理复合体内的服务处理器请求。 或者,如果处理器资源不足以在可分配资源的预留部分内处理服务处理器请求,则服务处理器请求被发送到外部处理复合体。