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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>
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- 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>
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Change-Id: Ie3f3fb2050428af1fc398b1577dfc090cd7d26cf
Reviewed-on: http://gfw160.austin.ibm.com:8080/gerrit/591
Tested-by: Jenkins Server
Reviewed-by: MIKE J. JONES <mjjones@us.ibm.com>
Reviewed-by: Melissa J. Connell <missyc@us.ibm.com>
Reviewed-by: Douglas R. Gilbert <dgilbert@us.ibm.com>
Reviewed-by: MATTHEW S. BARTH <msbarth@us.ibm.com>
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Most interactions with the stack-segment are under the VMM
subsystem where the VMM lock is held. The 'createStack'
function is called by TaskMgr when creating a task and the
VMM lock is not held. Needed to ensure that manipulating
the block list in the stack-segment is spinlock protected.
Change-Id: I0d961661c21cb9c6367eb4f341bf744659fbc7b7
Reviewed-on: http://gfw160.austin.ibm.com:8080/gerrit/441
Tested-by: Jenkins Server
Reviewed-by: MATTHEW S. BARTH <msbarth@us.ibm.com>
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redundancies and also to have a single place to update the memory
map if needed.
See Task 3507.
Change-Id: I8f2d632983abe6d6798784e975cd93057018594b
Reviewed-on: http://gfw160.austin.ibm.com:8080/gerrit/330
Tested-by: Jenkins Server
Reviewed-by: Daniel M. Crowell <dcrowell@us.ibm.com>
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- Create stack segment.
- Allocate stack blocks on stack create.
Change-Id: Ida90055afb68f208c479b5fdc19d3d931d026105
Reviewed-on: http://gfw160.austin.ibm.com:8080/gerrit/271
Tested-by: Jenkins Server
Reviewed-by: A. Patrick Williams III <iawillia@us.ibm.com>
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