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Disclosed is a method to broaden the practice to provide a simple and
effective solution for transforming a normal function resource into a
protected function resource for a Logical Partitioning (LPAR)
English (United States)
This text was extracted from a PDF file.
100% of the total text.
Page 1 of 1
A Method To Establish And Treat Logical Function Device(s) Of A Multifunctional Chip As Protected Hypervisor Resource(s)
A method, system, and apparatus has been established to move the functional control area of a multifunctional chip to a secure area of memory while the functions are remapped to the normal ranges expected by the operating system instance in the respective logical partition. However, there arises a situation in which a function must be removed so that the removed function can serve as a protected hypervisor of the LPAR system.
Employing this newly disclosed method, the Real Time Clock (RTC) function is removed and protected as a hypervisor resource in order to provide time-keeping for the LPAR system. This is accomplished by remapping the RTC address into a secured 4K-page address owned by the hypervisor instead of the address expected by the partition's operating system. Since the address of the RTC is in hypervisor space, the RTC becomes a protected hypervisor resource.
In fact, we can establish and treat any function of a multifunctional chip by the same method. For example, if the hypervisor want to reserve a serial port for its communication need, that serial port will be mapped to the same secured 4K-page as the RTC function being mapped into.
Disclosed by International Business Machines Corporation