The migration of LPARs across Power systems affects many attributes
including that of the associativity of memory blocks and CPUs. The
patches in this set execute when a system is coming up fresh upon a
migration target. They are intended to,
* Recognize changes to the associativity of memory and CPUs recorded
in internal data structures when compared to the latest copies in
the device tree (e.g. ibm,dynamic-memory, ibm,dynamic-memory-v2,
cpus),
* Recognize changes to the associativity mapping (e.g. ibm,
associativity-lookup-arrays), locate all assigned memory blocks
corresponding to each changed row, and readd all such blocks.
* Generate calls to other code layers to reset the data structures
related to associativity of the CPUs and memory.
* Re-register the 'changed' entities into the target system.
Re-registration of CPUs and memory blocks mostly entails acting as
if they have been newly hot-added into the target system.
Signed-off-by: Michael Bringmann <m...@linux.vnet.ibm.com>
Michael Bringmann (3):
powerpc migration/drmem: Modify DRMEM code to export more features
powerpc migration/cpu: Associativity & cpu changes
powerpc migration/memory: Associativity & memory updates
---
Changes in RFC:
-- Restructure and rearrange content of patches to co-locate
similar or related modifications
-- Rename pseries_update_drconf_cpu to pseries_update_cpu
-- Simplify code to update CPU nodes during mobility checks.
Remove functions to generate extra HP_ELOG messages in favor
of direct function calls to dlpar_cpu_readd_by_index, or
dlpar_memory_readd_by_index.
-- Revise code order in dlpar_cpu_readd_by_index() to present
more appropriate error codes from underlying layers of the
implementation.
-- Add hotplug device lock around all property updates
-- Schedule all CPU and memory changes due to device-tree updates /
LPAR mobility as workqueue operations
-- Export DRMEM accessor functions to parse 'ibm,dynamic-memory-v2'
-- Export DRMEM functions to provide user copies of LMB array
-- Compress code using DRMEM accessor functions.
-- Split topology timer crash fix into new patch.
-- Modify DRMEM code to replace usages of dt_root_addr_cells, and
dt_mem_next_cell, as these are only available at first boot.
-- Correct a bug in DRC index selection for queued operation.
-- Rebase to 4.17-rc5 kernel
