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The IOMMU handles this re-mapping, allowing the native device drivers to be used in a guest operating system. In some architectures IOMMU also performs hardware interrupt re-mapping, in a manner similar to standard memory address re-mapping. Peripheral memory paging can be supported by an IOMMU.
List of AMD and AMD-based hardware that supports IOMMU. AMD's implementation of IOMMU is also known as AMD-Vi. [101] Please note that just because a motherboard uses a chipset that supports IOMMU does not mean it is able to and the bios must have an ACPI IVRS
The graphics address remapping table (GART), [1] also known as the graphics aperture remapping table, [2] or graphics translation table (GTT), [3] is an I/O memory management unit (IOMMU) used by Accelerated Graphics Port (AGP) and PCI Express (PCIe) graphics cards.
The new API will do away with automatic resource-management and pipeline-management tasks and allow developers to take full low-level control of adapter memory and rendering states. The display driver model from Windows 8.1 and Windows Phone have converged into a unified model for Windows 10.
If the address field is non-zero, it is a disk address of the block, which has previously been rolled out — the block is fetched from disk, the pbit is set to one and the physical memory address updated to point to the block in memory. This makes descriptors equivalent to a page-table entry in an MMU system, but descriptors are free of a table.
Currently only available in Mac OS X 10.6 "Snow Leopard", Mac OS X 10.7 "Lion", and OS X 10.8 "Mountain Lion" Added Support to Install ISO files from USB; 5.0.5033: March 14, 2013 Support for Windows 8 and Windows 8 Pro (64-bit only) Boot Camp support for Macs with a 3 TB hard drive; Drops support for 32-bit Windows 7
HSA defines a special case of memory sharing, where the MMU of the CPU and the IOMMU of the GPU have an identical pageable virtual address space.. In computer hardware, shared memory refers to a (typically large) block of random access memory (RAM) that can be accessed by several different central processing units (CPUs) in a multiprocessor computer system.
The DMA command is issued by specifying a pair of a local address and a remote address: for example when a SPE program issues a put DMA command, it specifies an address of its own local memory as the source and a virtual memory address (pointing to either the main memory or the local memory of another SPE) as the target, together with a block size.