kernel.git/arch/powerpc/platforms/pseries/hotplug-memory.c, branch linux-4.8.y

powerpc: Fix unused function warning 'lmb_to_memblock'

2016-08-09T06:52:00Z

This patch fixes the following warning: arch/powerpc/platforms/pseries/hotplug-memory.c:323:29: error: 'lmb_to_memblock' defined but not used [-Werror=unused-function] static struct memory_block *lmb_to_memblock(struct of_drconf_cell *lmb) ^~~~~~~~~~~~~~~ The only consumer of this function is 'dlpar_remove_lmb', which is enabled with CONFIG_MEMORY_HOTREMOVE, so move it into the same ifdef block. Signed-off-by: Michael Ellerman

powerpc/pseries: Remove call to memblock_add()

2016-07-15T10:18:37Z

The call to memblock_add is not needed, this is already done by memory_add(). This patch removes this call which shrinks dlpar_add_lmb_memory() enough that it can be merged into dlpar_add_lmb(). Signed-off-by: Nathan Fontenot Signed-off-by: Michael Ellerman

powerpc/pseries: Auto-online hotplugged memory

2016-07-15T10:18:37Z

A recent update (commit id 31bc3858ea3) allows for automatically onlining memory that is added. This patch sets the config option CONFIG_MEMORY_HOTPLUG_DEFAULT_ONLINE=y for pseries and updates the pseries memory hotplug code so that DLPAR added memory can be automatically onlined instead of explicitly onlining the memory. Signed-off-by: Nathan Fontenot Signed-off-by: Michael Ellerman

powerpc/pseries: Dynamic add entires to associativity lookup array

2016-07-15T10:18:26Z

Dynamically add entries to the associativity lookup array The ibm,associativity-lookup-arrays property may only contain associativity arrays for LMBs present at boot time. When hotplug adding a LMB its associativity array may not be in the associativity lookup array, this patch adds the ability to add new entries to the associativity lookup array. Signed-off-by: Nathan Fontenot Signed-off-by: Michael Ellerman

powerpc/pseries: Move property cloning into its own routine

2016-07-15T05:02:26Z

Move property cloning code into its own routine Split the pieces of dlpar_clone_drconf_property() that create a copy of the property struct into its own routine. This allows for creating clones of more than just the ibm,dynamic-memory property used in memory hotplug. Signed-off-by: Nathan Fontenot Signed-off-by: Michael Ellerman

powerpc/pseries: Update LMB associativity index during DLPAR add/remove

2016-04-11T01:23:39Z

The associativity array index specified for a LMB in the device tree, /ibm,dynamic-reconfiguration-memory/ibm,dynamic-memory, needs to be updated prior to DLPAR adding a LMB and after DLPAR removing a LMB. Without doing this step in the DLPAR add process a LMB could be configured with the incorrect affinity. For a LMB that was not present at boot the affinity index is set to 0xffffffff, which defaults to adding the LMB to the first online node since the index is not a valid value. Or, the affinity index could contain a stale value if the LMB was present at boot but later DLPAR removed and is being DLPAR added back to the system. This patch adds a step in the DLPAR add flow to look up the associativity index for a LMB prior to adding a LMB and setting the associativity to 0xffffffff when a LMB is removed. This patch also modifies the DLPAR add/remove flow to no longer do a single update of the device tree property after all of the requested DLPAR operations are complete and now does a property update during the add or remove of each LMB. Signed-off-by: Nathan Fontenot Signed-off-by: Michael Ellerman

powerpc/pseries: Refactor dlpar_add_lmb() code

2016-04-11T01:23:38Z

Re-factor dlpar_lmb_add() routine by moving the validation of the lmb flags and the acquireing of the DRC to a wrapper around the work to add the memory to the system. This is done to make handling of errors during the addition of the memory easier and to facilitate the upcoming addition of updating the lmb's affinity prior to adding the memory. Signed-off-by: Nathan Fontenot Signed-off-by: Michael Ellerman

powerpc/pseries: use kmemdup rather than duplicating its implementation

2015-08-18T09:34:42Z

The patch was generated using fixed coccinelle semantic patch scripts/coccinelle/api/memdup.cocci [1]. [1]: http://permalink.gmane.org/gmane.linux.kernel/2014320 Signed-off-by: Andrzej Hajda Reviewed-by: Nathan Fontenot Signed-off-by: Michael Ellerman

powerpc/pseries: Fix compile of memory hotplug without CONFIG_MEMORY_HOTREMOVE

2015-04-15T01:55:28Z

51925fb3c5 "powerpc/pseries: Implement memory hotplug remove in the kernel" broke compile when CONFIG_MEMORY_HOTREMOVE is not defined due to missing symbols. This fixes the issue by adding the missing symbols. Signed-off-by: Alexey Kardashevskiy Acked-by: Nathan Fontenot Signed-off-by: Michael Ellerman

powerpc/pseries: Correct memory hotplug locking

2015-04-13T23:26:08Z

Memory dlpar handling can return from dlpar_memory() without releasing the device_hotplug lock. Correct this routine to ensure the lock is released. Fixes: 5f97b2a0d176 ("powerpc/pseries: Implement memory hotplug add in the kernel") Signed-off-by: Nathan Fontenot Signed-off-by: Michael Ellerman