From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from e5.ny.us.ibm.com (e5.ny.us.ibm.com [32.97.182.145]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "e5.ny.us.ibm.com", Issuer "Equifax" (not verified)) by ozlabs.org (Postfix) with ESMTPS id 42571B6F6E for ; Thu, 22 Mar 2012 08:38:28 +1100 (EST) Received: from /spool/local by e5.ny.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Wed, 21 Mar 2012 17:38:22 -0400 Received: from d01relay05.pok.ibm.com (d01relay05.pok.ibm.com [9.56.227.237]) by d01dlp01.pok.ibm.com (Postfix) with ESMTP id 84CA738C8062 for ; Wed, 21 Mar 2012 17:37:17 -0400 (EDT) Received: from d01av02.pok.ibm.com (d01av02.pok.ibm.com [9.56.224.216]) by d01relay05.pok.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id q2LLbHfs254448 for ; Wed, 21 Mar 2012 17:37:17 -0400 Received: from d01av02.pok.ibm.com (loopback [127.0.0.1]) by d01av02.pok.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id q2LLbHHe018525 for ; Wed, 21 Mar 2012 18:37:17 -0300 Message-ID: <1332365890.3858.26.camel@key-ThinkPad-W510> Subject: [PATCH 02/17] powerpc: Add pseries update notifier for OFDT prop changes From: Kent Yoder To: linux-kernel@vger.kernel.org Date: Wed, 21 Mar 2012 16:38:10 -0500 In-Reply-To: <1332365297.3858.5.camel@key-ThinkPad-W510> References: <1332365297.3858.5.camel@key-ThinkPad-W510> Content-Type: text/plain; charset="UTF-8" Mime-Version: 1.0 Cc: rcj@linux.vnet.ibm.com, linuxppc-dev@lists.ozlabs.org, linux-crypto@vger.kernel.org List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , From: Robert Jennings 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 Signed-off-by: Kent Yoder --- arch/powerpc/include/asm/pSeries_reconfig.h | 12 ++++++++++++ arch/powerpc/platforms/pseries/reconfig.c | 7 +++++++ 2 files changed, 19 insertions(+), 0 deletions(-) diff --git a/arch/powerpc/include/asm/pSeries_reconfig.h b/arch/powerpc/include/asm/pSeries_reconfig.h index 23cd6cc..c07edfe 100644 --- a/arch/powerpc/include/asm/pSeries_reconfig.h +++ b/arch/powerpc/include/asm/pSeries_reconfig.h @@ -13,6 +13,18 @@ #define PSERIES_RECONFIG_REMOVE 0x0002 #define PSERIES_DRCONF_MEM_ADD 0x0003 #define PSERIES_DRCONF_MEM_REMOVE 0x0004 +#define PSERIES_UPDATE_PROPERTY 0x0005 + +/** + * pSeries_reconfig_notify - Notifier value structure for OFDT property updates + * + * @node: Device tree node which owns the property being updated + * @property: Updated property + */ +struct pSeries_reconfig_prop_update { + struct device_node *node; + struct property *property; +}; #ifdef CONFIG_PPC_PSERIES extern int pSeries_reconfig_notifier_register(struct notifier_block *); diff --git a/arch/powerpc/platforms/pseries/reconfig.c b/arch/powerpc/platforms/pseries/reconfig.c index 168651a..7b3bf76 100644 --- a/arch/powerpc/platforms/pseries/reconfig.c +++ b/arch/powerpc/platforms/pseries/reconfig.c @@ -103,11 +103,13 @@ int pSeries_reconfig_notifier_register(struct notifier_block *nb) { return blocking_notifier_chain_register(&pSeries_reconfig_chain, nb); } +EXPORT_SYMBOL_GPL(pSeries_reconfig_notifier_register); void pSeries_reconfig_notifier_unregister(struct notifier_block *nb) { blocking_notifier_chain_unregister(&pSeries_reconfig_chain, nb); } +EXPORT_SYMBOL_GPL(pSeries_reconfig_notifier_unregister); int pSeries_reconfig_notify(unsigned long action, void *p) { @@ -426,6 +428,7 @@ static int do_remove_property(char *buf, size_t bufsize) static int do_update_property(char *buf, size_t bufsize) { struct device_node *np; + struct pSeries_reconfig_prop_update upd_value; unsigned char *value; char *name, *end, *next_prop; int rc, length; @@ -454,6 +457,10 @@ static int do_update_property(char *buf, size_t bufsize) return -ENODEV; } + upd_value.node = np; + upd_value.property = newprop; + pSeries_reconfig_notify(PSERIES_UPDATE_PROPERTY, &upd_value); + rc = prom_update_property(np, newprop, oldprop); if (rc) return rc; -- 1.7.1