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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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4726b7b5e5
This adds an update notifier mechanism for changes to properties in the device tree. One use of this would be a device driver that needs to act on changes to it's properties in the device tree after a live migration or a dynamic activation that is triggered by updates to ofdt properties. Signed-off-by: Robert Jennings <rcj@linux.vnet.ibm.com> Signed-off-by: Kent Yoder <key@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
48 lines
1.4 KiB
C
48 lines
1.4 KiB
C
#ifndef _PPC64_PSERIES_RECONFIG_H
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#define _PPC64_PSERIES_RECONFIG_H
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#ifdef __KERNEL__
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#include <linux/notifier.h>
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/*
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* Use this API if your code needs to know about OF device nodes being
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* added or removed on pSeries systems.
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*/
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#define PSERIES_RECONFIG_ADD 0x0001
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#define PSERIES_RECONFIG_REMOVE 0x0002
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#define PSERIES_DRCONF_MEM_ADD 0x0003
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#define PSERIES_DRCONF_MEM_REMOVE 0x0004
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#define PSERIES_UPDATE_PROPERTY 0x0005
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/**
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* pSeries_reconfig_notify - Notifier value structure for OFDT property updates
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*
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* @node: Device tree node which owns the property being updated
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* @property: Updated property
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*/
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struct pSeries_reconfig_prop_update {
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struct device_node *node;
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struct property *property;
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};
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#ifdef CONFIG_PPC_PSERIES
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extern int pSeries_reconfig_notifier_register(struct notifier_block *);
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extern void pSeries_reconfig_notifier_unregister(struct notifier_block *);
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extern int pSeries_reconfig_notify(unsigned long action, void *p);
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/* Not the best place to put this, will be fixed when we move some
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* of the rtas suspend-me stuff to pseries */
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extern void pSeries_coalesce_init(void);
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#else /* !CONFIG_PPC_PSERIES */
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static inline int pSeries_reconfig_notifier_register(struct notifier_block *nb)
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{
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return 0;
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}
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static inline void pSeries_reconfig_notifier_unregister(struct notifier_block *nb) { }
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static inline void pSeries_coalesce_init(void) { }
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#endif /* CONFIG_PPC_PSERIES */
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#endif /* __KERNEL__ */
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#endif /* _PPC64_PSERIES_RECONFIG_H */
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