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powerpc+of: Add of node/property notification chain for adds and removes

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This patch moves the notification chain for updates to the device tree
from the powerpc/pseries code to the base OF code. This makes this
functionality available to all architectures.

Additionally the notification chain is updated to allow notifications
for property add/remove/update. To make this work a pointer to a new
struct (of_prop_reconfig) is passed to the routines in the notification chain.
The of_prop_reconfig property contains a pointer to the node containing the
property and a pointer to the property itself. In the case of property
updates, the property pointer refers to the new property.

Signed-off-by: Nathan Fontenot <nfont@linux.vnet.ibm.com>
Acked-by: Rob Herring <rob.herring@calxeda.com>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Nathan Fontenot
2012-10-02 16:57:57 +00:00
committed by Benjamin Herrenschmidt
parent f594972083
commit 1cf3d8b3d2
12 changed files with 163 additions and 154 deletions
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8
arch/powerpc/platforms/pseries/hotplug-cpu.c
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@@ -23,12 +23,12 @@
#include <linux/delay.h>
#include <linux/sched.h> /* for idle_task_exit */
#include <linux/cpu.h>
#include <linux/of.h>
#include <asm/prom.h>
#include <asm/rtas.h>
#include <asm/firmware.h>
#include <asm/machdep.h>
#include <asm/vdso_datapage.h>
#include <asm/pSeries_reconfig.h>
#include <asm/xics.h>
#include "plpar_wrappers.h"
#include "offline_states.h"
@@ -333,10 +333,10 @@ static int pseries_smp_notifier(struct notifier_block *nb,
int err = 0;
switch (action) {
case PSERIES_RECONFIG_ADD:
case OF_RECONFIG_ATTACH_NODE:
err = pseries_add_processor(node);
break;
case PSERIES_RECONFIG_REMOVE:
case OF_RECONFIG_DETACH_NODE:
pseries_remove_processor(node);
break;
}
@@ -399,7 +399,7 @@ static int __init pseries_cpu_hotplug_init(void)
/* Processors can be added/removed only on LPAR */
if (firmware_has_feature(FW_FEATURE_LPAR)) {
pSeries_reconfig_notifier_register(&pseries_smp_nb);
of_reconfig_notifier_register(&pseries_smp_nb);
cpu_maps_update_begin();
if (cede_offline_enabled && parse_cede_parameters() == 0) {
default_offline_state = CPU_STATE_INACTIVE;