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* Change copyright prolog for all files to Apache.Patrick Williams2014-05-211-22/+22
| | | | | | | Change-Id: I5664587b4f889099290ef50d50fa9ce5e580e1eb Reviewed-on: http://gfw160.aus.stglabs.ibm.com:8080/gerrit/11167 Tested-by: Jenkins Server Reviewed-by: A. Patrick Williams III <iawillia@us.ibm.com>
* Optimize PageTableManager and associated VMM.Patrick Williams2012-04-181-1/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | - Changed overall page table behavior to no longer use C bits in page table entries. Instead, individual blocks mark pages as dirty based on stores during page faults. Initially all writable pages are marked read-only until the first store to it. At that time the block gets an exception and changes the permission on the page table entry to writable and marks its own SPTE to dirty. - Greatly reduced the number of tlbie's and page table accesses. Accomplished this by: * Skipping many of the page table manipulations, such as LRU updates, when the PTE is invalid. * Converting most of the previously general-case of "Modifying a PTE" to specific cases such as "Resetting the Reference Bit" and "Modifying the SW field". - Fixed the LRU-flush algorithm so that it is O(n) instead of O(n^2), where n = size of page table. Change-Id: I2520fa88970fd7f656e6348bf6b34d5db82fd3db Reviewed-on: http://gfw160.austin.ibm.com:8080/gerrit/892 Tested-by: Jenkins Server Reviewed-by: Douglas R. Gilbert <dgilbert@us.ibm.com> Reviewed-by: Daniel M. Crowell <dcrowell@us.ibm.com> Reviewed-by: A. Patrick Williams III <iawillia@us.ibm.com>
* Mechanism to detect low memory and cast out older pageDoug Gilbert2011-09-191-0/+6
| | | | | | | | Change-Id: Icce8e01f3d1cd2942f2b9ff802993da0441535ee Reviewed-on: http://gfw160.austin.ibm.com:8080/gerrit/344 Tested-by: Jenkins Server Reviewed-by: A. Patrick Williams III <iawillia@us.ibm.com> Reviewed-by: Douglas R. Gilbert <dgilbert@us.ibm.com>
* Adding a basic interface and implementation to the Segment/BlockDan Crowell2011-09-061-0/+14
| | | | | | | | | | | | | path to update the LRU statistics when the PageTableManager code clears the reference bit. This is not meant to be a complete implementation (different Task is open for that). This is Task 3400. Change-Id: If67efd16ead6f68a74f5f5a698013c1b852864d9 Reviewed-on: http://gfw160.austin.ibm.com:8080/gerrit/231 Tested-by: Jenkins Server Reviewed-by: Daniel M. Crowell <dcrowell@us.ibm.com>
* map virtual address to physical address in kernelDoug Gilbert2011-08-251-0/+9
| | | | | | | | Change-Id: Id18e604facd517598a18968af3dff927026ad894 Reviewed-on: http://gfw160.austin.ibm.com:8080/gerrit/272 Tested-by: Jenkins Server Reviewed-by: A. Patrick Williams III <iawillia@us.ibm.com> Reviewed-by: Daniel M. Crowell <dcrowell@us.ibm.com>
* Add copyright headers to all source files.Patrick Williams2011-08-241-0/+22
| | | | | | | Change-Id: I205f2409e56032cfc0aaf01d7e26d357f0b86373 Reviewed-on: http://gfw160.austin.ibm.com:8080/gerrit/277 Reviewed-by: A. Patrick Williams III <iawillia@us.ibm.com> Tested-by: Jenkins Server
* VMM Improvements.Patrick Williams2011-07-201-0/+52
- Segment Manager - Base / Device Segments - Block for Base image. Change-Id: Ic0c058e5c5b210ec1c48d30f6ed9f9837d74a3c8 Reviewed-on: http://gfw160.austin.ibm.com:8080/gerrit/193 Tested-by: Jenkins Server Reviewed-by: MATTHEW S. BARTH <msbarth@us.ibm.com>
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