From 2a0352fa4a78081c76be1e450b51a6aa27c92616 Mon Sep 17 00:00:00 2001
From: Gavin Shan <shangw@linux.vnet.ibm.com>
Date: Tue, 20 Mar 2012 21:30:27 +0000
Subject: [PATCH 01/13] powerpc/eeh: Remove eeh device from OF node

Originally, the PCI sensitive OF node is tracing the eeh device
through struct device_node->edev. However, it was regarded as
bad idea.

The patch removes struct device_node->edev and uses PCI_DN to
trace the corresponding eeh device according to BenH's comments.

Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/include/asm/pci-bridge.h    |  8 ++++++++
 arch/powerpc/platforms/pseries/eeh_dev.c |  2 +-
 include/linux/of.h                       | 10 ----------
 3 files changed, 9 insertions(+), 11 deletions(-)

diff --git a/arch/powerpc/include/asm/pci-bridge.h b/arch/powerpc/include/asm/pci-bridge.h
index 5d487657322e..21f99aec41b9 100644
--- a/arch/powerpc/include/asm/pci-bridge.h
+++ b/arch/powerpc/include/asm/pci-bridge.h
@@ -155,6 +155,7 @@ struct pci_dn {
 
 	struct	pci_dev *pcidev;	/* back-pointer to the pci device */
 #ifdef CONFIG_EEH
+	struct eeh_dev *edev;		/* eeh device */
 	int	class_code;		/* pci device class */
 	int	eeh_mode;		/* See eeh.h for possible EEH_MODEs */
 	int	eeh_config_addr;
@@ -185,6 +186,13 @@ static inline int pci_device_from_OF_node(struct device_node *np,
 	return 0;
 }
 
+#if defined(CONFIG_EEH)
+static inline struct eeh_dev *of_node_to_eeh_dev(struct device_node *dn)
+{
+	return PCI_DN(dn)->edev;
+}
+#endif
+
 /** Find the bus corresponding to the indicated device node */
 extern struct pci_bus *pcibios_find_pci_bus(struct device_node *dn);
 
diff --git a/arch/powerpc/platforms/pseries/eeh_dev.c b/arch/powerpc/platforms/pseries/eeh_dev.c
index f3aed7dcae95..c4507d095900 100644
--- a/arch/powerpc/platforms/pseries/eeh_dev.c
+++ b/arch/powerpc/platforms/pseries/eeh_dev.c
@@ -62,7 +62,7 @@ void * __devinit eeh_dev_init(struct device_node *dn, void *data)
 	}
 
 	/* Associate EEH device with OF node */
-	dn->edev  = edev;
+	PCI_DN(dn)->edev = edev;
 	edev->dn  = dn;
 	edev->phb = phb;
 
diff --git a/include/linux/of.h b/include/linux/of.h
index d46a18ffbebb..f02d8b2f799d 100644
--- a/include/linux/of.h
+++ b/include/linux/of.h
@@ -58,9 +58,6 @@ struct device_node {
 	struct	kref kref;
 	unsigned long _flags;
 	void	*data;
-#if defined(CONFIG_EEH)
-	struct eeh_dev *edev;
-#endif
 #if defined(CONFIG_SPARC)
 	char	*path_component_name;
 	unsigned int unique_id;
@@ -75,13 +72,6 @@ struct of_phandle_args {
 	uint32_t args[MAX_PHANDLE_ARGS];
 };
 
-#if defined(CONFIG_EEH)
-static inline struct eeh_dev *of_node_to_eeh_dev(struct device_node *dn)
-{
-	return dn->edev;
-}
-#endif
-
 #ifdef CONFIG_OF_DYNAMIC
 extern struct device_node *of_node_get(struct device_node *node);
 extern void of_node_put(struct device_node *node);

From 39baadbf36cee3ede5fdb8a34006d9109e5e2570 Mon Sep 17 00:00:00 2001
From: Gavin Shan <shangw@linux.vnet.ibm.com>
Date: Tue, 20 Mar 2012 21:30:28 +0000
Subject: [PATCH 02/13] powerpc/eeh: Remove eeh information from pci_dn

The patch removes the eeh information from pci_dn since the eeh
device (struct eeh_dev) already contained those information and
the copy in pci_dn is no longer used except for the pseries iommu
mapping code, which we change to retrieve the PE address from eeh
device instead.

Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/include/asm/pci-bridge.h  |  8 -------
 arch/powerpc/platforms/pseries/iommu.c | 29 ++++++++++++--------------
 2 files changed, 13 insertions(+), 24 deletions(-)

diff --git a/arch/powerpc/include/asm/pci-bridge.h b/arch/powerpc/include/asm/pci-bridge.h
index 21f99aec41b9..ac39e6a3b25a 100644
--- a/arch/powerpc/include/asm/pci-bridge.h
+++ b/arch/powerpc/include/asm/pci-bridge.h
@@ -156,14 +156,6 @@ struct pci_dn {
 	struct	pci_dev *pcidev;	/* back-pointer to the pci device */
 #ifdef CONFIG_EEH
 	struct eeh_dev *edev;		/* eeh device */
-	int	class_code;		/* pci device class */
-	int	eeh_mode;		/* See eeh.h for possible EEH_MODEs */
-	int	eeh_config_addr;
-	int	eeh_pe_config_addr; /* new-style partition endpoint address */
-	int	eeh_check_count;	/* # times driver ignored error */
-	int	eeh_freeze_count;	/* # times this device froze up. */
-	int	eeh_false_positives;	/* # times this device reported #ff's */
-	u32	config_space[16];	/* saved PCI config space */
 #endif
 #define IODA_INVALID_PE		(-1)
 #ifdef CONFIG_PPC_POWERNV
diff --git a/arch/powerpc/platforms/pseries/iommu.c b/arch/powerpc/platforms/pseries/iommu.c
index c442f2b1980f..0915b1ad66ce 100644
--- a/arch/powerpc/platforms/pseries/iommu.c
+++ b/arch/powerpc/platforms/pseries/iommu.c
@@ -809,8 +809,7 @@ machine_arch_initcall(pseries, find_existing_ddw_windows);
 static int query_ddw(struct pci_dev *dev, const u32 *ddw_avail,
 			struct ddw_query_response *query)
 {
-	struct device_node *dn;
-	struct pci_dn *pcidn;
+	struct eeh_dev *edev;
 	u32 cfg_addr;
 	u64 buid;
 	int ret;
@@ -821,12 +820,12 @@ static int query_ddw(struct pci_dev *dev, const u32 *ddw_avail,
 	 * Retrieve them from the pci device, not the node with the
 	 * dma-window property
 	 */
-	dn = pci_device_to_OF_node(dev);
-	pcidn = PCI_DN(dn);
-	cfg_addr = pcidn->eeh_config_addr;
-	if (pcidn->eeh_pe_config_addr)
-		cfg_addr = pcidn->eeh_pe_config_addr;
-	buid = pcidn->phb->buid;
+	edev = pci_dev_to_eeh_dev(dev);
+	cfg_addr = edev->config_addr;
+	if (edev->pe_config_addr)
+		cfg_addr = edev->pe_config_addr;
+	buid = edev->phb->buid;
+
 	ret = rtas_call(ddw_avail[0], 3, 5, (u32 *)query,
 		  cfg_addr, BUID_HI(buid), BUID_LO(buid));
 	dev_info(&dev->dev, "ibm,query-pe-dma-windows(%x) %x %x %x"
@@ -839,8 +838,7 @@ static int create_ddw(struct pci_dev *dev, const u32 *ddw_avail,
 			struct ddw_create_response *create, int page_shift,
 			int window_shift)
 {
-	struct device_node *dn;
-	struct pci_dn *pcidn;
+	struct eeh_dev *edev;
 	u32 cfg_addr;
 	u64 buid;
 	int ret;
@@ -851,12 +849,11 @@ static int create_ddw(struct pci_dev *dev, const u32 *ddw_avail,
 	 * Retrieve them from the pci device, not the node with the
 	 * dma-window property
 	 */
-	dn = pci_device_to_OF_node(dev);
-	pcidn = PCI_DN(dn);
-	cfg_addr = pcidn->eeh_config_addr;
-	if (pcidn->eeh_pe_config_addr)
-		cfg_addr = pcidn->eeh_pe_config_addr;
-	buid = pcidn->phb->buid;
+	edev = pci_dev_to_eeh_dev(dev);
+	cfg_addr = edev->config_addr;
+	if (edev->pe_config_addr)
+		cfg_addr = edev->pe_config_addr;
+	buid = edev->phb->buid;
 
 	do {
 		/* extra outputs are LIOBN and dma-addr (hi, lo) */

From 1a5c2e63f497bdb5912138888053a02870ed1153 Mon Sep 17 00:00:00 2001
From: Gavin Shan <shangw@linux.vnet.ibm.com>
Date: Tue, 20 Mar 2012 21:30:29 +0000
Subject: [PATCH 03/13] powerpc/eeh: Retrieve PHB from global list

Currently, the existing PHBs are retrieved from the FDT (Flat
Device Tree) based on the name of FDT node. Specificly, those
FDT nodes whose names have prefix "pci" are regarded as PHBs.
That's inappropriate because some PCI bridges possibilly have
names leading with "pci". It caused EEH is enabled on same
PCI devices for towice.

The patch fixes the above issue. Besides, the PHBs are expected
to be figured out from FDT before enable EEH on them. Therefore,
it's resonable to retrieve the PHBs from the global linked list
traced by variable "hose_list" insteading poking them from FDT.

For the EEH implementation on pSeries platform, RTAS is critical
because all low-level functions are implemented based on RTAS.
Therefore, we should make sure "/rtas" OF node is available and
ready before to enable EEH core. However, it actually introduced
duplicate since the previous pSeries platform dependent initialization
function already do the check. Besides, we want to make eeh core
platform independent, so RTAS related staff should be removed there.
The patch removes the duplicate check on "/rtas" OF node for eeh
core.

Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/platforms/pseries/eeh.c | 19 +++++--------------
 1 file changed, 5 insertions(+), 14 deletions(-)

diff --git a/arch/powerpc/platforms/pseries/eeh.c b/arch/powerpc/platforms/pseries/eeh.c
index 8011088392d3..309d38ef7322 100644
--- a/arch/powerpc/platforms/pseries/eeh.c
+++ b/arch/powerpc/platforms/pseries/eeh.c
@@ -984,7 +984,8 @@ int __exit eeh_ops_unregister(const char *name)
  */
 void __init eeh_init(void)
 {
-	struct device_node *phb, *np;
+	struct pci_controller *hose, *tmp;
+	struct device_node *phb;
 	int ret;
 
 	/* call platform initialization function */
@@ -1000,19 +1001,9 @@ void __init eeh_init(void)
 
 	raw_spin_lock_init(&confirm_error_lock);
 
-	np = of_find_node_by_path("/rtas");
-	if (np == NULL)
-		return;
-
-	/* Enable EEH for all adapters.  Note that eeh requires buid's */
-	for (phb = of_find_node_by_name(NULL, "pci"); phb;
-	     phb = of_find_node_by_name(phb, "pci")) {
-		unsigned long buid;
-
-		buid = get_phb_buid(phb);
-		if (buid == 0 || !of_node_to_eeh_dev(phb))
-			continue;
-
+	/* Enable EEH for all adapters */
+	list_for_each_entry_safe(hose, tmp, &hose_list, list_node) {
+		phb = hose->dn;
 		traverse_pci_devices(phb, eeh_early_enable, NULL);
 	}
 

From 6431f20879e338306b997cd75a36824cf9d6e687 Mon Sep 17 00:00:00 2001
From: Anton Blanchard <anton@samba.org>
Date: Wed, 21 Mar 2012 15:47:07 +0000
Subject: [PATCH 04/13] powerpc: Make function that parses RTAS error logs
 global

The IO event interrupt code has a function that finds specific
sections in an RTAS error log. We want to use it in the EPOW
code so make it global.

Rename things to make it less cryptic:

find_xelog_section() -> get_pseries_errorlog()
struct pseries_elog_section -> struct pseries_errorlog

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/include/asm/rtas.h               | 33 +++++++++
 arch/powerpc/kernel/rtas.c                    | 34 ++++++++++
 arch/powerpc/platforms/pseries/io_event_irq.c | 68 +------------------
 3 files changed, 69 insertions(+), 66 deletions(-)

diff --git a/arch/powerpc/include/asm/rtas.h b/arch/powerpc/include/asm/rtas.h
index 01c143bb77ae..a01fa3eee6bd 100644
--- a/arch/powerpc/include/asm/rtas.h
+++ b/arch/powerpc/include/asm/rtas.h
@@ -204,6 +204,39 @@ struct rtas_ext_event_log_v6 {
 					/* Variable length.		*/
 };
 
+/* pSeries event log format */
+
+/* Two bytes ASCII section IDs */
+#define PSERIES_ELOG_SECT_ID_PRIV_HDR		(('P' << 8) | 'H')
+#define PSERIES_ELOG_SECT_ID_USER_HDR		(('U' << 8) | 'H')
+#define PSERIES_ELOG_SECT_ID_PRIMARY_SRC	(('P' << 8) | 'S')
+#define PSERIES_ELOG_SECT_ID_EXTENDED_UH	(('E' << 8) | 'H')
+#define PSERIES_ELOG_SECT_ID_FAILING_MTMS	(('M' << 8) | 'T')
+#define PSERIES_ELOG_SECT_ID_SECONDARY_SRC	(('S' << 8) | 'S')
+#define PSERIES_ELOG_SECT_ID_DUMP_LOCATOR	(('D' << 8) | 'H')
+#define PSERIES_ELOG_SECT_ID_FW_ERROR		(('S' << 8) | 'W')
+#define PSERIES_ELOG_SECT_ID_IMPACT_PART_ID	(('L' << 8) | 'P')
+#define PSERIES_ELOG_SECT_ID_LOGIC_RESOURCE_ID	(('L' << 8) | 'R')
+#define PSERIES_ELOG_SECT_ID_HMC_ID		(('H' << 8) | 'M')
+#define PSERIES_ELOG_SECT_ID_EPOW		(('E' << 8) | 'P')
+#define PSERIES_ELOG_SECT_ID_IO_EVENT		(('I' << 8) | 'E')
+#define PSERIES_ELOG_SECT_ID_MANUFACT_INFO	(('M' << 8) | 'I')
+#define PSERIES_ELOG_SECT_ID_CALL_HOME		(('C' << 8) | 'H')
+#define PSERIES_ELOG_SECT_ID_USER_DEF		(('U' << 8) | 'D')
+
+/* Vendor specific Platform Event Log Format, Version 6, section header */
+struct pseries_errorlog {
+	uint16_t id;			/* 0x00 2-byte ASCII section ID	*/
+	uint16_t length;		/* 0x02 Section length in bytes	*/
+	uint8_t version;		/* 0x04 Section version		*/
+	uint8_t subtype;		/* 0x05 Section subtype		*/
+	uint16_t creator_component;	/* 0x06 Creator component ID	*/
+	uint8_t data[];			/* 0x08 Start of section data	*/
+};
+
+struct pseries_errorlog *get_pseries_errorlog(struct rtas_error_log *log,
+					      uint16_t section_id);
+
 /*
  * This can be set by the rtas_flash module so that it can get called
  * as the absolutely last thing before the kernel terminates.
diff --git a/arch/powerpc/kernel/rtas.c b/arch/powerpc/kernel/rtas.c
index 9f843cdfee9e..4d1a7babe342 100644
--- a/arch/powerpc/kernel/rtas.c
+++ b/arch/powerpc/kernel/rtas.c
@@ -868,6 +868,40 @@ int rtas_ibm_suspend_me(struct rtas_args *args)
 }
 #endif
 
+/**
+ * Find a specific pseries error log in an RTAS extended event log.
+ * @log: RTAS error/event log
+ * @section_id: two character section identifier
+ *
+ * Returns a pointer to the specified errorlog or NULL if not found.
+ */
+struct pseries_errorlog *get_pseries_errorlog(struct rtas_error_log *log,
+					      uint16_t section_id)
+{
+	struct rtas_ext_event_log_v6 *ext_log =
+		(struct rtas_ext_event_log_v6 *)log->buffer;
+	struct pseries_errorlog *sect;
+	unsigned char *p, *log_end;
+
+	/* Check that we understand the format */
+	if (log->extended_log_length < sizeof(struct rtas_ext_event_log_v6) ||
+	    ext_log->log_format != RTAS_V6EXT_LOG_FORMAT_EVENT_LOG ||
+	    ext_log->company_id != RTAS_V6EXT_COMPANY_ID_IBM)
+		return NULL;
+
+	log_end = log->buffer + log->extended_log_length;
+	p = ext_log->vendor_log;
+
+	while (p < log_end) {
+		sect = (struct pseries_errorlog *)p;
+		if (sect->id == section_id)
+			return sect;
+		p += sect->length;
+	}
+
+	return NULL;
+}
+
 asmlinkage int ppc_rtas(struct rtas_args __user *uargs)
 {
 	struct rtas_args args;
diff --git a/arch/powerpc/platforms/pseries/io_event_irq.c b/arch/powerpc/platforms/pseries/io_event_irq.c
index 1a709bc48ce1..ef9d9d84c7d5 100644
--- a/arch/powerpc/platforms/pseries/io_event_irq.c
+++ b/arch/powerpc/platforms/pseries/io_event_irq.c
@@ -63,72 +63,8 @@ EXPORT_SYMBOL_GPL(pseries_ioei_notifier_list);
 
 static int ioei_check_exception_token;
 
-/* pSeries event log format */
-
-/* Two bytes ASCII section IDs */
-#define PSERIES_ELOG_SECT_ID_PRIV_HDR		(('P' << 8) | 'H')
-#define PSERIES_ELOG_SECT_ID_USER_HDR		(('U' << 8) | 'H')
-#define PSERIES_ELOG_SECT_ID_PRIMARY_SRC	(('P' << 8) | 'S')
-#define PSERIES_ELOG_SECT_ID_EXTENDED_UH	(('E' << 8) | 'H')
-#define PSERIES_ELOG_SECT_ID_FAILING_MTMS	(('M' << 8) | 'T')
-#define PSERIES_ELOG_SECT_ID_SECONDARY_SRC	(('S' << 8) | 'S')
-#define PSERIES_ELOG_SECT_ID_DUMP_LOCATOR	(('D' << 8) | 'H')
-#define PSERIES_ELOG_SECT_ID_FW_ERROR		(('S' << 8) | 'W')
-#define PSERIES_ELOG_SECT_ID_IMPACT_PART_ID	(('L' << 8) | 'P')
-#define PSERIES_ELOG_SECT_ID_LOGIC_RESOURCE_ID	(('L' << 8) | 'R')
-#define PSERIES_ELOG_SECT_ID_HMC_ID		(('H' << 8) | 'M')
-#define PSERIES_ELOG_SECT_ID_EPOW		(('E' << 8) | 'P')
-#define PSERIES_ELOG_SECT_ID_IO_EVENT		(('I' << 8) | 'E')
-#define PSERIES_ELOG_SECT_ID_MANUFACT_INFO	(('M' << 8) | 'I')
-#define PSERIES_ELOG_SECT_ID_CALL_HOME		(('C' << 8) | 'H')
-#define PSERIES_ELOG_SECT_ID_USER_DEF		(('U' << 8) | 'D')
-
-/* Vendor specific Platform Event Log Format, Version 6, section header */
-struct pseries_elog_section {
-	uint16_t id;			/* 0x00 2-byte ASCII section ID	*/
-	uint16_t length;		/* 0x02 Section length in bytes	*/
-	uint8_t version;		/* 0x04 Section version		*/
-	uint8_t subtype;		/* 0x05 Section subtype		*/
-	uint16_t creator_component;	/* 0x06 Creator component ID	*/
-	uint8_t data[];			/* 0x08 Start of section data	*/
-};
-
 static char ioei_rtas_buf[RTAS_DATA_BUF_SIZE] __cacheline_aligned;
 
-/**
- * Find data portion of a specific section in RTAS extended event log.
- * @elog: RTAS error/event log.
- * @sect_id: secsion ID.
- *
- * Return:
- *	pointer to the section data of the specified section
- *	NULL if not found
- */
-static struct pseries_elog_section *find_xelog_section(struct rtas_error_log *elog,
-						       uint16_t sect_id)
-{
-	struct rtas_ext_event_log_v6 *xelog =
-		(struct rtas_ext_event_log_v6 *) elog->buffer;
-	struct pseries_elog_section *sect;
-	unsigned char *p, *log_end;
-
-	/* Check that we understand the format */
-	if (elog->extended_log_length < sizeof(struct rtas_ext_event_log_v6) ||
-	    xelog->log_format != RTAS_V6EXT_LOG_FORMAT_EVENT_LOG ||
-	    xelog->company_id != RTAS_V6EXT_COMPANY_ID_IBM)
-		return NULL;
-
-	log_end = elog->buffer + elog->extended_log_length;
-	p = xelog->vendor_log;
-	while (p < log_end) {
-		sect = (struct pseries_elog_section *)p;
-		if (sect->id == sect_id)
-			return sect;
-		p += sect->length;
-	}
-	return NULL;
-}
-
 /**
  * Find the data portion of an IO Event section from event log.
  * @elog: RTAS error/event log.
@@ -138,7 +74,7 @@ static struct pseries_elog_section *find_xelog_section(struct rtas_error_log *el
  */
 static struct pseries_io_event * ioei_find_event(struct rtas_error_log *elog)
 {
-	struct pseries_elog_section *sect;
+	struct pseries_errorlog *sect;
 
 	/* We should only ever get called for io-event interrupts, but if
 	 * we do get called for another type then something went wrong so
@@ -152,7 +88,7 @@ static struct pseries_io_event * ioei_find_event(struct rtas_error_log *elog)
 		return NULL;
 	}
 
-	sect = find_xelog_section(elog, PSERIES_ELOG_SECT_ID_IO_EVENT);
+	sect = get_pseries_errorlog(elog, PSERIES_ELOG_SECT_ID_IO_EVENT);
 	if (unlikely(!sect)) {
 		printk_once(KERN_WARNING "io_event_irq: RTAS extended event "
 			    "log does not contain an IO Event section. "

From 55fc0c561742c710857dc5a7a591b461a561cf1f Mon Sep 17 00:00:00 2001
From: Anton Blanchard <anton@samba.org>
Date: Wed, 21 Mar 2012 15:49:59 +0000
Subject: [PATCH 05/13] powerpc/pseries: Parse and handle EPOW interrupts

We have code to take environmental and power warning (EPOW)
interrupts but it simply prints a terse error message:

EPOW <0x6240040000000b8 0x0 0x0>

which tells us nothing about what happened. Even worse, if we
don't correctly respond to the interrupt we may get terminated
by firmware.

Add code to printk some useful information when we get EPOW events.
We want to make it clear that we have an error, that it was
reported by firmware and that the RTAS error log will have more
detailed information. eg:

	Ambient temperature too high reported by firmware.
	Check RTAS error log for details

Depending on the error encountered, we now issue an immediate or
an orderly power down.

Move initialization of the EPOW interrupt earlier in boot since we
want to respond to them as early as possible.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/platforms/pseries/ras.c | 133 +++++++++++++++++++++++----
 1 file changed, 116 insertions(+), 17 deletions(-)

diff --git a/arch/powerpc/platforms/pseries/ras.c b/arch/powerpc/platforms/pseries/ras.c
index 086d2ae4e06a..4246d7b9dce9 100644
--- a/arch/powerpc/platforms/pseries/ras.c
+++ b/arch/powerpc/platforms/pseries/ras.c
@@ -35,6 +35,8 @@
 #include <linux/random.h>
 #include <linux/sysrq.h>
 #include <linux/bitops.h>
+#include <linux/fs.h>
+#include <linux/reboot.h>
 
 #include <asm/uaccess.h>
 #include <asm/system.h>
@@ -95,26 +97,127 @@ static int __init init_ras_IRQ(void)
 
 	return 0;
 }
-__initcall(init_ras_IRQ);
+subsys_initcall(init_ras_IRQ);
 
-/*
- * Handle power subsystem events (EPOW).
- *
- * Presently we just log the event has occurred.  This should be fixed
- * to examine the type of power failure and take appropriate action where
- * the time horizon permits something useful to be done.
- */
+#define EPOW_SHUTDOWN_NORMAL				1
+#define EPOW_SHUTDOWN_ON_UPS				2
+#define EPOW_SHUTDOWN_LOSS_OF_CRITICAL_FUNCTIONS	3
+#define EPOW_SHUTDOWN_AMBIENT_TEMPERATURE_TOO_HIGH	4
+
+static void handle_system_shutdown(char event_modifier)
+{
+	switch (event_modifier) {
+	case EPOW_SHUTDOWN_NORMAL:
+		pr_emerg("Firmware initiated power off");
+		orderly_poweroff(1);
+		break;
+
+	case EPOW_SHUTDOWN_ON_UPS:
+		pr_emerg("Loss of power reported by firmware, system is "
+			"running on UPS/battery");
+		break;
+
+	case EPOW_SHUTDOWN_LOSS_OF_CRITICAL_FUNCTIONS:
+		pr_emerg("Loss of system critical functions reported by "
+			"firmware");
+		pr_emerg("Check RTAS error log for details");
+		orderly_poweroff(1);
+		break;
+
+	case EPOW_SHUTDOWN_AMBIENT_TEMPERATURE_TOO_HIGH:
+		pr_emerg("Ambient temperature too high reported by firmware");
+		pr_emerg("Check RTAS error log for details");
+		orderly_poweroff(1);
+		break;
+
+	default:
+		pr_err("Unknown power/cooling shutdown event (modifier %d)",
+			event_modifier);
+	}
+}
+
+struct epow_errorlog {
+	unsigned char sensor_value;
+	unsigned char event_modifier;
+	unsigned char extended_modifier;
+	unsigned char reserved;
+	unsigned char platform_reason;
+};
+
+#define EPOW_RESET			0
+#define EPOW_WARN_COOLING		1
+#define EPOW_WARN_POWER			2
+#define EPOW_SYSTEM_SHUTDOWN		3
+#define EPOW_SYSTEM_HALT		4
+#define EPOW_MAIN_ENCLOSURE		5
+#define EPOW_POWER_OFF			7
+
+void rtas_parse_epow_errlog(struct rtas_error_log *log)
+{
+	struct pseries_errorlog *pseries_log;
+	struct epow_errorlog *epow_log;
+	char action_code;
+	char modifier;
+
+	pseries_log = get_pseries_errorlog(log, PSERIES_ELOG_SECT_ID_EPOW);
+	if (pseries_log == NULL)
+		return;
+
+	epow_log = (struct epow_errorlog *)pseries_log->data;
+	action_code = epow_log->sensor_value & 0xF;	/* bottom 4 bits */
+	modifier = epow_log->event_modifier & 0xF;	/* bottom 4 bits */
+
+	switch (action_code) {
+	case EPOW_RESET:
+		pr_err("Non critical power or cooling issue cleared");
+		break;
+
+	case EPOW_WARN_COOLING:
+		pr_err("Non critical cooling issue reported by firmware");
+		pr_err("Check RTAS error log for details");
+		break;
+
+	case EPOW_WARN_POWER:
+		pr_err("Non critical power issue reported by firmware");
+		pr_err("Check RTAS error log for details");
+		break;
+
+	case EPOW_SYSTEM_SHUTDOWN:
+		handle_system_shutdown(epow_log->event_modifier);
+		break;
+
+	case EPOW_SYSTEM_HALT:
+		pr_emerg("Firmware initiated power off");
+		orderly_poweroff(1);
+		break;
+
+	case EPOW_MAIN_ENCLOSURE:
+	case EPOW_POWER_OFF:
+		pr_emerg("Critical power/cooling issue reported by firmware");
+		pr_emerg("Check RTAS error log for details");
+		pr_emerg("Immediate power off");
+		emergency_sync();
+		kernel_power_off();
+		break;
+
+	default:
+		pr_err("Unknown power/cooling event (action code %d)",
+			action_code);
+	}
+}
+
+/* Handle environmental and power warning (EPOW) interrupts. */
 static irqreturn_t ras_epow_interrupt(int irq, void *dev_id)
 {
-	int status = 0xdeadbeef;
-	int state = 0;
+	int status;
+	int state;
 	int critical;
 
 	status = rtas_call(ras_get_sensor_state_token, 2, 2, &state,
 			   EPOW_SENSOR_TOKEN, EPOW_SENSOR_INDEX);
 
 	if (state > 3)
-		critical = 1;  /* Time Critical */
+		critical = 1;		/* Time Critical */
 	else
 		critical = 0;
 
@@ -127,14 +230,10 @@ static irqreturn_t ras_epow_interrupt(int irq, void *dev_id)
 			   critical, __pa(&ras_log_buf),
 				rtas_get_error_log_max());
 
-	udbg_printf("EPOW <0x%lx 0x%x 0x%x>\n",
-		    *((unsigned long *)&ras_log_buf), status, state);
-	printk(KERN_WARNING "EPOW <0x%lx 0x%x 0x%x>\n",
-	       *((unsigned long *)&ras_log_buf), status, state);
-
-	/* format and print the extended information */
 	log_error(ras_log_buf, ERR_TYPE_RTAS_LOG, 0);
 
+	rtas_parse_epow_errlog((struct rtas_error_log *)ras_log_buf);
+
 	spin_unlock(&ras_log_buf_lock);
 	return IRQ_HANDLED;
 }

From 587f83e8dd50d22bc0c62e32ec49fd319b0912fe Mon Sep 17 00:00:00 2001
From: Anton Blanchard <anton@samba.org>
Date: Wed, 21 Mar 2012 15:53:43 +0000
Subject: [PATCH 06/13] powerpc/pseries: Use rtas_get_sensor in RAS code

We have rtas_get_sensor so we may as well use it.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/platforms/pseries/ras.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/arch/powerpc/platforms/pseries/ras.c b/arch/powerpc/platforms/pseries/ras.c
index 4246d7b9dce9..670b45bde8f1 100644
--- a/arch/powerpc/platforms/pseries/ras.c
+++ b/arch/powerpc/platforms/pseries/ras.c
@@ -59,7 +59,6 @@ static DEFINE_SPINLOCK(ras_log_buf_lock);
 static char global_mce_data_buf[RTAS_ERROR_LOG_MAX];
 static DEFINE_PER_CPU(__u64, mce_data_buf);
 
-static int ras_get_sensor_state_token;
 static int ras_check_exception_token;
 
 #define EPOW_SENSOR_TOKEN	9
@@ -77,7 +76,6 @@ static int __init init_ras_IRQ(void)
 {
 	struct device_node *np;
 
-	ras_get_sensor_state_token = rtas_token("get-sensor-state");
 	ras_check_exception_token = rtas_token("check-exception");
 
 	/* Internal Errors */
@@ -213,8 +211,7 @@ static irqreturn_t ras_epow_interrupt(int irq, void *dev_id)
 	int state;
 	int critical;
 
-	status = rtas_call(ras_get_sensor_state_token, 2, 2, &state,
-			   EPOW_SENSOR_TOKEN, EPOW_SENSOR_INDEX);
+	status = rtas_get_sensor(EPOW_SENSOR_TOKEN, EPOW_SENSOR_INDEX, &state);
 
 	if (state > 3)
 		critical = 1;		/* Time Critical */

From 6f43747f6a7ef216fbea1d5b5d94044d504e12ce Mon Sep 17 00:00:00 2001
From: Anton Blanchard <anton@samba.org>
Date: Wed, 21 Mar 2012 15:56:49 +0000
Subject: [PATCH 07/13] powerpc/pseries: Remove RTAS_POWERMGM_EVENTS

IBM bit 2 in the rtas event-scan and check-exception calls is
marked reserved in the PAPR, so remove it from our RAS code.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/include/asm/rtas.h      | 1 -
 arch/powerpc/platforms/pseries/ras.c | 2 +-
 2 files changed, 1 insertion(+), 2 deletions(-)

diff --git a/arch/powerpc/include/asm/rtas.h b/arch/powerpc/include/asm/rtas.h
index a01fa3eee6bd..f0a4db31ecb6 100644
--- a/arch/powerpc/include/asm/rtas.h
+++ b/arch/powerpc/include/asm/rtas.h
@@ -74,7 +74,6 @@ struct rtas_suspend_me_data {
 /* RTAS event classes */
 #define RTAS_INTERNAL_ERROR		0x80000000 /* set bit 0 */
 #define RTAS_EPOW_WARNING		0x40000000 /* set bit 1 */
-#define RTAS_POWERMGM_EVENTS		0x20000000 /* set bit 2 */
 #define RTAS_HOTPLUG_EVENTS		0x10000000 /* set bit 3 */
 #define RTAS_IO_EVENTS			0x08000000 /* set bit 4 */
 #define RTAS_EVENT_SCAN_ALL_EVENTS	0xffffffff
diff --git a/arch/powerpc/platforms/pseries/ras.c b/arch/powerpc/platforms/pseries/ras.c
index 670b45bde8f1..42fda797d008 100644
--- a/arch/powerpc/platforms/pseries/ras.c
+++ b/arch/powerpc/platforms/pseries/ras.c
@@ -223,7 +223,7 @@ static irqreturn_t ras_epow_interrupt(int irq, void *dev_id)
 	status = rtas_call(ras_check_exception_token, 6, 1, NULL,
 			   RTAS_VECTOR_EXTERNAL_INTERRUPT,
 			   virq_to_hw(irq),
-			   RTAS_EPOW_WARNING | RTAS_POWERMGM_EVENTS,
+			   RTAS_EPOW_WARNING,
 			   critical, __pa(&ras_log_buf),
 				rtas_get_error_log_max());
 

From cc8b526366e8bed9a950288316e0ab03bef4420a Mon Sep 17 00:00:00 2001
From: Anton Blanchard <anton@samba.org>
Date: Wed, 21 Mar 2012 15:58:03 +0000
Subject: [PATCH 08/13] powerpc/pseries: Clean up ras_error_interrupt code

The RAS error interrupt is no longer used but we may as well
mirror the changes we made to the EPOW interrupt.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/platforms/pseries/ras.c | 27 ++++++++-------------------
 1 file changed, 8 insertions(+), 19 deletions(-)

diff --git a/arch/powerpc/platforms/pseries/ras.c b/arch/powerpc/platforms/pseries/ras.c
index 42fda797d008..4406628efa58 100644
--- a/arch/powerpc/platforms/pseries/ras.c
+++ b/arch/powerpc/platforms/pseries/ras.c
@@ -246,7 +246,7 @@ static irqreturn_t ras_epow_interrupt(int irq, void *dev_id)
 static irqreturn_t ras_error_interrupt(int irq, void *dev_id)
 {
 	struct rtas_error_log *rtas_elog;
-	int status = 0xdeadbeef;
+	int status;
 	int fatal;
 
 	spin_lock(&ras_log_buf_lock);
@@ -254,7 +254,7 @@ static irqreturn_t ras_error_interrupt(int irq, void *dev_id)
 	status = rtas_call(ras_check_exception_token, 6, 1, NULL,
 			   RTAS_VECTOR_EXTERNAL_INTERRUPT,
 			   virq_to_hw(irq),
-			   RTAS_INTERNAL_ERROR, 1 /*Time Critical */,
+			   RTAS_INTERNAL_ERROR, 1 /* Time Critical */,
 			   __pa(&ras_log_buf),
 				rtas_get_error_log_max());
 
@@ -269,24 +269,13 @@ static irqreturn_t ras_error_interrupt(int irq, void *dev_id)
 	log_error(ras_log_buf, ERR_TYPE_RTAS_LOG, fatal);
 
 	if (fatal) {
-		udbg_printf("Fatal HW Error <0x%lx 0x%x>\n",
-			    *((unsigned long *)&ras_log_buf), status);
-		printk(KERN_EMERG "Error: Fatal hardware error <0x%lx 0x%x>\n",
-		       *((unsigned long *)&ras_log_buf), status);
-
-#ifndef DEBUG_RTAS_POWER_OFF
-		/* Don't actually power off when debugging so we can test
-		 * without actually failing while injecting errors.
-		 * Error data will not be logged to syslog.
-		 */
-		ppc_md.power_off();
-#endif
+		pr_emerg("Fatal hardware error reported by firmware");
+		pr_emerg("Check RTAS error log for details");
+		pr_emerg("Immediate power off");
+		emergency_sync();
+		kernel_power_off();
 	} else {
-		udbg_printf("Recoverable HW Error <0x%lx 0x%x>\n",
-			    *((unsigned long *)&ras_log_buf), status);
-		printk(KERN_WARNING
-		       "Warning: Recoverable hardware error <0x%lx 0x%x>\n",
-		       *((unsigned long *)&ras_log_buf), status);
+		pr_err("Recoverable hardware error reported by firmware");
 	}
 
 	spin_unlock(&ras_log_buf_lock);

From 90128997815009686ec9d72a4b1490455d838e66 Mon Sep 17 00:00:00 2001
From: Anton Blanchard <anton@samba.org>
Date: Wed, 21 Mar 2012 15:59:04 +0000
Subject: [PATCH 09/13] powerpc/pseries: Cut down on enthusiastic use of
 defines in RAS code

So many defines for such a little file. Most of them can go.

Also remove the single entry changelog, we have git for that.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/platforms/pseries/ras.c | 26 +-------------------------
 1 file changed, 1 insertion(+), 25 deletions(-)

diff --git a/arch/powerpc/platforms/pseries/ras.c b/arch/powerpc/platforms/pseries/ras.c
index 4406628efa58..c4dfccd3a3d9 100644
--- a/arch/powerpc/platforms/pseries/ras.c
+++ b/arch/powerpc/platforms/pseries/ras.c
@@ -16,39 +16,15 @@
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  */
 
-/* Change Activity:
- * 2001/09/21 : engebret : Created with minimal EPOW and HW exception support.
- * End Change Activity
- */
-
-#include <linux/errno.h>
-#include <linux/threads.h>
-#include <linux/kernel_stat.h>
-#include <linux/signal.h>
 #include <linux/sched.h>
-#include <linux/ioport.h>
 #include <linux/interrupt.h>
-#include <linux/timex.h>
-#include <linux/init.h>
-#include <linux/delay.h>
 #include <linux/irq.h>
-#include <linux/random.h>
-#include <linux/sysrq.h>
-#include <linux/bitops.h>
+#include <linux/of.h>
 #include <linux/fs.h>
 #include <linux/reboot.h>
 
-#include <asm/uaccess.h>
-#include <asm/system.h>
-#include <asm/io.h>
-#include <asm/pgtable.h>
-#include <asm/irq.h>
-#include <asm/cache.h>
-#include <asm/prom.h>
-#include <asm/ptrace.h>
 #include <asm/machdep.h>
 #include <asm/rtas.h>
-#include <asm/udbg.h>
 #include <asm/firmware.h>
 
 #include "pseries.h"

From 7ba3e4f5877466b0f81dcd3cb78db5d75b267645 Mon Sep 17 00:00:00 2001
From: Stephen Rothwell <sfr@canb.auug.org.au>
Date: Wed, 21 Mar 2012 18:09:51 +0000
Subject: [PATCH 10/13] powerpc: Remove NO_IRQ_IGNORE

Now that legacy iSeries is gone, this is no longer used.

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/include/asm/irq.h     | 6 ------
 arch/powerpc/include/asm/machdep.h | 4 +---
 arch/powerpc/kernel/irq.c          | 4 ++--
 3 files changed, 3 insertions(+), 11 deletions(-)

diff --git a/arch/powerpc/include/asm/irq.h b/arch/powerpc/include/asm/irq.h
index fe0b09dceb7d..cf417e510736 100644
--- a/arch/powerpc/include/asm/irq.h
+++ b/arch/powerpc/include/asm/irq.h
@@ -27,12 +27,6 @@ extern atomic_t ppc_n_lost_interrupts;
 /* This number is used when no interrupt has been assigned */
 #define NO_IRQ			(0)
 
-/* This is a special irq number to return from get_irq() to tell that
- * no interrupt happened _and_ ignore it (don't count it as bad). Some
- * platforms like iSeries rely on that.
- */
-#define NO_IRQ_IGNORE		((unsigned int)-1)
-
 /* Total number of virq in the platform */
 #define NR_IRQS		CONFIG_NR_IRQS
 
diff --git a/arch/powerpc/include/asm/machdep.h b/arch/powerpc/include/asm/machdep.h
index bf37931d1ad6..42ce570812c1 100644
--- a/arch/powerpc/include/asm/machdep.h
+++ b/arch/powerpc/include/asm/machdep.h
@@ -99,9 +99,7 @@ struct machdep_calls {
 
 	void		(*init_IRQ)(void);
 
-	/* Return an irq, or NO_IRQ to indicate there are none pending.
-	 * If for some reason there is no irq, but the interrupt
-	 * shouldn't be counted as spurious, return NO_IRQ_IGNORE. */
+	/* Return an irq, or NO_IRQ to indicate there are none pending. */
 	unsigned int	(*get_irq)(void);
 
 	/* PCI stuff */
diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c
index a3d128e94cff..46ce5f733511 100644
--- a/arch/powerpc/kernel/irq.c
+++ b/arch/powerpc/kernel/irq.c
@@ -445,9 +445,9 @@ void do_IRQ(struct pt_regs *regs)
 	may_hard_irq_enable();
 
 	/* And finally process it */
-	if (irq != NO_IRQ && irq != NO_IRQ_IGNORE)
+	if (irq != NO_IRQ)
 		handle_one_irq(irq);
-	else if (irq != NO_IRQ_IGNORE)
+	else
 		__get_cpu_var(irq_stat).spurious_irqs++;
 
 	irq_exit();

From 1d9a47315042606b4217691bcea36cfa6ccbde66 Mon Sep 17 00:00:00 2001
From: Stephen Rothwell <sfr@canb.auug.org.au>
Date: Wed, 21 Mar 2012 18:23:27 +0000
Subject: [PATCH 11/13] powerpc: Random little legacy iSeries removal tidy ups

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/boot/.gitignore            |  1 -
 arch/powerpc/include/asm/iommu.h        |  1 -
 arch/powerpc/include/asm/mmu-hash64.h   | 12 ------------
 arch/powerpc/include/asm/smp.h          |  1 -
 arch/powerpc/include/asm/udbg.h         |  1 -
 arch/powerpc/kernel/irq.c               |  4 ++--
 arch/powerpc/kernel/prom_init.c         |  2 +-
 arch/powerpc/kernel/udbg.c              |  3 ---
 arch/powerpc/kernel/vdso.c              |  4 ++--
 arch/powerpc/platforms/cell/beat_htab.c |  2 --
 10 files changed, 5 insertions(+), 26 deletions(-)

diff --git a/arch/powerpc/boot/.gitignore b/arch/powerpc/boot/.gitignore
index 12da77ec0228..1c1aadc8c48f 100644
--- a/arch/powerpc/boot/.gitignore
+++ b/arch/powerpc/boot/.gitignore
@@ -27,7 +27,6 @@ zImage.bin.*
 zImage.chrp
 zImage.coff
 zImage.holly
-zImage.iseries
 zImage.*lds
 zImage.miboot
 zImage.pmac
diff --git a/arch/powerpc/include/asm/iommu.h b/arch/powerpc/include/asm/iommu.h
index edfc9803ec91..957a83f43646 100644
--- a/arch/powerpc/include/asm/iommu.h
+++ b/arch/powerpc/include/asm/iommu.h
@@ -112,7 +112,6 @@ extern void iommu_unmap_page(struct iommu_table *tbl, dma_addr_t dma_handle,
 			     struct dma_attrs *attrs);
 
 extern void iommu_init_early_pSeries(void);
-extern void iommu_init_early_iSeries(void);
 extern void iommu_init_early_dart(void);
 extern void iommu_init_early_pasemi(void);
 
diff --git a/arch/powerpc/include/asm/mmu-hash64.h b/arch/powerpc/include/asm/mmu-hash64.h
index 412ba493cb98..e06794ac8d27 100644
--- a/arch/powerpc/include/asm/mmu-hash64.h
+++ b/arch/powerpc/include/asm/mmu-hash64.h
@@ -267,7 +267,6 @@ extern void demote_segment_4k(struct mm_struct *mm, unsigned long addr);
 
 extern void hpte_init_native(void);
 extern void hpte_init_lpar(void);
-extern void hpte_init_iSeries(void);
 extern void hpte_init_beat(void);
 extern void hpte_init_beat_v3(void);
 
@@ -325,9 +324,6 @@ extern void slb_set_size(u16 size);
  * WARNING - If you change these you must make sure the asm
  * implementations in slb_allocate (slb_low.S), do_stab_bolted
  * (head.S) and ASM_VSID_SCRAMBLE (below) are changed accordingly.
- *
- * You'll also need to change the precomputed VSID values in head.S
- * which are used by the iSeries firmware.
  */
 
 #define VSID_MULTIPLIER_256M	ASM_CONST(200730139)	/* 28-bit prime */
@@ -484,14 +480,6 @@ static inline unsigned long get_vsid(unsigned long context, unsigned long ea,
 			     | (ea >> SID_SHIFT_1T), 1T);
 }
 
-/*
- * This is only used on legacy iSeries in lparmap.c,
- * hence the 256MB segment assumption.
- */
-#define VSID_SCRAMBLE(pvsid)	(((pvsid) * VSID_MULTIPLIER_256M) %	\
-				 VSID_MODULUS_256M)
-#define KERNEL_VSID(ea)		VSID_SCRAMBLE(GET_ESID(ea))
-
 #endif /* __ASSEMBLY__ */
 
 #endif /* _ASM_POWERPC_MMU_HASH64_H_ */
diff --git a/arch/powerpc/include/asm/smp.h b/arch/powerpc/include/asm/smp.h
index adba970ce918..ebc24dc5b1a1 100644
--- a/arch/powerpc/include/asm/smp.h
+++ b/arch/powerpc/include/asm/smp.h
@@ -122,7 +122,6 @@ extern void smp_muxed_ipi_set_data(int cpu, unsigned long data);
 extern void smp_muxed_ipi_message_pass(int cpu, int msg);
 extern irqreturn_t smp_ipi_demux(void);
 
-void smp_init_iSeries(void);
 void smp_init_pSeries(void);
 void smp_init_cell(void);
 void smp_init_celleb(void);
diff --git a/arch/powerpc/include/asm/udbg.h b/arch/powerpc/include/asm/udbg.h
index 8338aef5a4d3..b3038817b8dc 100644
--- a/arch/powerpc/include/asm/udbg.h
+++ b/arch/powerpc/include/asm/udbg.h
@@ -44,7 +44,6 @@ extern void __init udbg_init_debug_lpar_hvsi(void);
 extern void __init udbg_init_pmac_realmode(void);
 extern void __init udbg_init_maple_realmode(void);
 extern void __init udbg_init_pas_realmode(void);
-extern void __init udbg_init_iseries(void);
 extern void __init udbg_init_rtas_panel(void);
 extern void __init udbg_init_rtas_console(void);
 extern void __init udbg_init_debug_beat(void);
diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c
index 46ce5f733511..cea2d9f3ae4e 100644
--- a/arch/powerpc/kernel/irq.c
+++ b/arch/powerpc/kernel/irq.c
@@ -208,8 +208,8 @@ notrace void arch_local_irq_restore(unsigned long en)
 	 * we are checking the "new" CPU instead of the old one. This
 	 * is only a problem if an event happened on the "old" CPU.
 	 *
-	 * External interrupt events on non-iseries will have caused
-	 * interrupts to be hard-disabled, so there is no problem, we
+	 * External interrupt events will have caused interrupts to
+	 * be hard-disabled, so there is no problem, we
 	 * cannot have preempted.
 	 */
 	irq_happened = get_irq_happened();
diff --git a/arch/powerpc/kernel/prom_init.c b/arch/powerpc/kernel/prom_init.c
index e2d599048142..ea4e311e09d2 100644
--- a/arch/powerpc/kernel/prom_init.c
+++ b/arch/powerpc/kernel/prom_init.c
@@ -447,7 +447,7 @@ static void __init __attribute__((noreturn)) prom_panic(const char *reason)
 	if (RELOC(of_platform) == PLATFORM_POWERMAC)
 		asm("trap\n");
 
-	/* ToDo: should put up an SRC here on p/iSeries */
+	/* ToDo: should put up an SRC here on pSeries */
 	call_prom("exit", 0, 0);
 
 	for (;;)			/* should never get here */
diff --git a/arch/powerpc/kernel/udbg.c b/arch/powerpc/kernel/udbg.c
index 57fa2c0a531c..c39c1ca77f46 100644
--- a/arch/powerpc/kernel/udbg.c
+++ b/arch/powerpc/kernel/udbg.c
@@ -46,9 +46,6 @@ void __init udbg_early_init(void)
 #elif defined(CONFIG_PPC_EARLY_DEBUG_MAPLE)
 	/* Maple real mode debug */
 	udbg_init_maple_realmode();
-#elif defined(CONFIG_PPC_EARLY_DEBUG_ISERIES)
-	/* For iSeries - hit Ctrl-x Ctrl-x to see the output */
-	udbg_init_iseries();
 #elif defined(CONFIG_PPC_EARLY_DEBUG_BEAT)
 	udbg_init_debug_beat();
 #elif defined(CONFIG_PPC_EARLY_DEBUG_PAS_REALMODE)
diff --git a/arch/powerpc/kernel/vdso.c b/arch/powerpc/kernel/vdso.c
index d36ee1055f88..972cca278f98 100644
--- a/arch/powerpc/kernel/vdso.c
+++ b/arch/powerpc/kernel/vdso.c
@@ -721,10 +721,10 @@ static int __init vdso_init(void)
 	vdso_data->version.minor = SYSTEMCFG_MINOR;
 	vdso_data->processor = mfspr(SPRN_PVR);
 	/*
-	 * Fake the old platform number for pSeries and iSeries and add
+	 * Fake the old platform number for pSeries and add
 	 * in LPAR bit if necessary
 	 */
-	vdso_data->platform = machine_is(iseries) ? 0x200 : 0x100;
+	vdso_data->platform = 0x100;
 	if (firmware_has_feature(FW_FEATURE_LPAR))
 		vdso_data->platform |= 1;
 	vdso_data->physicalMemorySize = memblock_phys_mem_size();
diff --git a/arch/powerpc/platforms/cell/beat_htab.c b/arch/powerpc/platforms/cell/beat_htab.c
index 2516c1cf8467..943c9d39aa16 100644
--- a/arch/powerpc/platforms/cell/beat_htab.c
+++ b/arch/powerpc/platforms/cell/beat_htab.c
@@ -95,7 +95,6 @@ static long beat_lpar_hpte_insert(unsigned long hpte_group,
 	unsigned long lpar_rc;
 	u64 hpte_v, hpte_r, slot;
 
-	/* same as iseries */
 	if (vflags & HPTE_V_SECONDARY)
 		return -1;
 
@@ -319,7 +318,6 @@ static long beat_lpar_hpte_insert_v3(unsigned long hpte_group,
 	unsigned long lpar_rc;
 	u64 hpte_v, hpte_r, slot;
 
-	/* same as iseries */
 	if (vflags & HPTE_V_SECONDARY)
 		return -1;
 

From cb52d8970eee65bf2c47d9a91bd4f58b17f595f4 Mon Sep 17 00:00:00 2001
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Date: Mon, 26 Mar 2012 19:06:30 +0000
Subject: [PATCH 12/13] powerpc+sparc/vio: Modernize driver registration

This makes vio_register_driver() get the module owner & name at compile
time like PCI drivers do, and adds a name pointer directly in struct
vio_driver to avoid having to explicitly initialize the embedded
struct device.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: David S. Miller <davem@davemloft.net>
---
 arch/powerpc/include/asm/vio.h     | 10 +++++++++-
 arch/powerpc/kernel/vio.c          | 12 ++++++++----
 arch/sparc/include/asm/vio.h       |  9 ++++++++-
 arch/sparc/kernel/ds.c             |  5 +----
 arch/sparc/kernel/vio.c            |  8 ++++++--
 drivers/block/sunvdc.c             |  5 +----
 drivers/net/ethernet/ibm/ibmveth.c |  7 ++-----
 drivers/net/ethernet/sun/sunvnet.c |  5 +----
 drivers/scsi/ibmvscsi/ibmvfc.c     |  7 ++-----
 drivers/scsi/ibmvscsi/ibmvscsi.c   |  7 ++-----
 drivers/scsi/ibmvscsi/ibmvstgt.c   |  5 +----
 drivers/tty/hvc/hvc_vio.c          |  7 ++-----
 drivers/tty/hvc/hvcs.c             |  5 +----
 13 files changed, 44 insertions(+), 48 deletions(-)

diff --git a/arch/powerpc/include/asm/vio.h b/arch/powerpc/include/asm/vio.h
index 0a290a195946..6bfd5ffe1d4f 100644
--- a/arch/powerpc/include/asm/vio.h
+++ b/arch/powerpc/include/asm/vio.h
@@ -69,6 +69,7 @@ struct vio_dev {
 };
 
 struct vio_driver {
+	const char *name;
 	const struct vio_device_id *id_table;
 	int (*probe)(struct vio_dev *dev, const struct vio_device_id *id);
 	int (*remove)(struct vio_dev *dev);
@@ -76,10 +77,17 @@ struct vio_driver {
 	 * be loaded in a CMO environment if it uses DMA.
 	 */
 	unsigned long (*get_desired_dma)(struct vio_dev *dev);
+	const struct dev_pm_ops *pm;
 	struct device_driver driver;
 };
 
-extern int vio_register_driver(struct vio_driver *drv);
+extern int __vio_register_driver(struct vio_driver *drv, struct module *owner,
+				 const char *mod_name);
+/*
+ * vio_register_driver must be a macro so that KBUILD_MODNAME can be expanded
+ */
+#define vio_register_driver(driver)		\
+	__vio_register_driver(driver, THIS_MODULE, KBUILD_MODNAME)
 extern void vio_unregister_driver(struct vio_driver *drv);
 
 extern int vio_cmo_entitlement_update(size_t);
diff --git a/arch/powerpc/kernel/vio.c b/arch/powerpc/kernel/vio.c
index bca3fc427b45..b2f7c8480bf6 100644
--- a/arch/powerpc/kernel/vio.c
+++ b/arch/powerpc/kernel/vio.c
@@ -1159,17 +1159,21 @@ static int vio_bus_remove(struct device *dev)
  * vio_register_driver: - Register a new vio driver
  * @drv:	The vio_driver structure to be registered.
  */
-int vio_register_driver(struct vio_driver *viodrv)
+int __vio_register_driver(struct vio_driver *viodrv, struct module *owner,
+			  const char *mod_name)
 {
-	printk(KERN_DEBUG "%s: driver %s registering\n", __func__,
-		viodrv->driver.name);
+	pr_debug("%s: driver %s registering\n", __func__, viodrv->name);
 
 	/* fill in 'struct driver' fields */
+	viodrv->driver.name = viodrv->name;
+	viodrv->driver.pm = viodrv->pm;
 	viodrv->driver.bus = &vio_bus_type;
+	viodrv->driver.owner = owner;
+	viodrv->driver.mod_name = mod_name;
 
 	return driver_register(&viodrv->driver);
 }
-EXPORT_SYMBOL(vio_register_driver);
+EXPORT_SYMBOL(__vio_register_driver);
 
 /**
  * vio_unregister_driver - Remove registration of vio driver.
diff --git a/arch/sparc/include/asm/vio.h b/arch/sparc/include/asm/vio.h
index 9d83d3bcb494..432afa838861 100644
--- a/arch/sparc/include/asm/vio.h
+++ b/arch/sparc/include/asm/vio.h
@@ -284,6 +284,7 @@ struct vio_dev {
 };
 
 struct vio_driver {
+	const char			*name;
 	struct list_head		node;
 	const struct vio_device_id	*id_table;
 	int (*probe)(struct vio_dev *dev, const struct vio_device_id *id);
@@ -371,7 +372,13 @@ do {	if (vio->debug & VIO_DEBUG_##TYPE) \
 		       vio->vdev->channel_id, ## a); \
 } while (0)
 
-extern int vio_register_driver(struct vio_driver *drv);
+extern int __vio_register_driver(struct vio_driver *drv, struct module *owner,
+				 const char *mod_name);
+/*
+ * vio_register_driver must be a macro so that KBUILD_MODNAME can be expanded
+ */
+#define vio_register_driver(driver)		\
+	__vio_register_driver(driver, THIS_MODULE, KBUILD_MODNAME)
 extern void vio_unregister_driver(struct vio_driver *drv);
 
 static inline struct vio_driver *to_vio_driver(struct device_driver *drv)
diff --git a/arch/sparc/kernel/ds.c b/arch/sparc/kernel/ds.c
index 381edcd5bc29..fea13c7b1aee 100644
--- a/arch/sparc/kernel/ds.c
+++ b/arch/sparc/kernel/ds.c
@@ -1244,10 +1244,7 @@ static struct vio_driver ds_driver = {
 	.id_table	= ds_match,
 	.probe		= ds_probe,
 	.remove		= ds_remove,
-	.driver		= {
-		.name	= "ds",
-		.owner	= THIS_MODULE,
-	}
+	.name		= "ds",
 };
 
 static int __init ds_init(void)
diff --git a/arch/sparc/kernel/vio.c b/arch/sparc/kernel/vio.c
index f67e28ef598c..5cffdc55f075 100644
--- a/arch/sparc/kernel/vio.c
+++ b/arch/sparc/kernel/vio.c
@@ -119,13 +119,17 @@ static struct bus_type vio_bus_type = {
 	.remove		= vio_device_remove,
 };
 
-int vio_register_driver(struct vio_driver *viodrv)
+int __vio_register_driver(struct vio_driver *viodrv, struct module *owner,
+			const char *mod_name)
 {
 	viodrv->driver.bus = &vio_bus_type;
+	viodrv->driver.name = viodrv->name;
+	viodrv->driver.owner = owner;
+	viodrv->driver.mod_name = mod_name;
 
 	return driver_register(&viodrv->driver);
 }
-EXPORT_SYMBOL(vio_register_driver);
+EXPORT_SYMBOL(__vio_register_driver);
 
 void vio_unregister_driver(struct vio_driver *viodrv)
 {
diff --git a/drivers/block/sunvdc.c b/drivers/block/sunvdc.c
index 48e8fee9f2d4..9dcf76a10bb6 100644
--- a/drivers/block/sunvdc.c
+++ b/drivers/block/sunvdc.c
@@ -839,10 +839,7 @@ static struct vio_driver vdc_port_driver = {
 	.id_table	= vdc_port_match,
 	.probe		= vdc_port_probe,
 	.remove		= vdc_port_remove,
-	.driver		= {
-		.name	= "vdc_port",
-		.owner	= THIS_MODULE,
-	}
+	.name		= "vdc_port",
 };
 
 static int __init vdc_init(void)
diff --git a/drivers/net/ethernet/ibm/ibmveth.c b/drivers/net/ethernet/ibm/ibmveth.c
index e877371680a9..9010cea68bc3 100644
--- a/drivers/net/ethernet/ibm/ibmveth.c
+++ b/drivers/net/ethernet/ibm/ibmveth.c
@@ -1616,11 +1616,8 @@ static struct vio_driver ibmveth_driver = {
 	.probe		= ibmveth_probe,
 	.remove		= ibmveth_remove,
 	.get_desired_dma = ibmveth_get_desired_dma,
-	.driver		= {
-		.name	= ibmveth_driver_name,
-		.owner	= THIS_MODULE,
-		.pm = &ibmveth_pm_ops,
-	}
+	.name		= ibmveth_driver_name,
+	.pm		= &ibmveth_pm_ops,
 };
 
 static int __init ibmveth_module_init(void)
diff --git a/drivers/net/ethernet/sun/sunvnet.c b/drivers/net/ethernet/sun/sunvnet.c
index 92a037a8228a..38e3ae9155b7 100644
--- a/drivers/net/ethernet/sun/sunvnet.c
+++ b/drivers/net/ethernet/sun/sunvnet.c
@@ -1259,10 +1259,7 @@ static struct vio_driver vnet_port_driver = {
 	.id_table	= vnet_port_match,
 	.probe		= vnet_port_probe,
 	.remove		= vnet_port_remove,
-	.driver		= {
-		.name	= "vnet_port",
-		.owner	= THIS_MODULE,
-	}
+	.name		= "vnet_port",
 };
 
 static int __init vnet_init(void)
diff --git a/drivers/scsi/ibmvscsi/ibmvfc.c b/drivers/scsi/ibmvscsi/ibmvfc.c
index bdfa223a7dbb..134a0ae85bb7 100644
--- a/drivers/scsi/ibmvscsi/ibmvfc.c
+++ b/drivers/scsi/ibmvscsi/ibmvfc.c
@@ -4890,11 +4890,8 @@ static struct vio_driver ibmvfc_driver = {
 	.probe = ibmvfc_probe,
 	.remove = ibmvfc_remove,
 	.get_desired_dma = ibmvfc_get_desired_dma,
-	.driver = {
-		.name = IBMVFC_NAME,
-		.owner = THIS_MODULE,
-		.pm = &ibmvfc_pm_ops,
-	}
+	.name = IBMVFC_NAME,
+	.pm = &ibmvfc_pm_ops,
 };
 
 static struct fc_function_template ibmvfc_transport_functions = {
diff --git a/drivers/scsi/ibmvscsi/ibmvscsi.c b/drivers/scsi/ibmvscsi/ibmvscsi.c
index e984951baeb6..3a6c4742951e 100644
--- a/drivers/scsi/ibmvscsi/ibmvscsi.c
+++ b/drivers/scsi/ibmvscsi/ibmvscsi.c
@@ -2061,11 +2061,8 @@ static struct vio_driver ibmvscsi_driver = {
 	.probe = ibmvscsi_probe,
 	.remove = ibmvscsi_remove,
 	.get_desired_dma = ibmvscsi_get_desired_dma,
-	.driver = {
-		.name = "ibmvscsi",
-		.owner = THIS_MODULE,
-		.pm = &ibmvscsi_pm_ops,
-	}
+	.name = "ibmvscsi",
+	.pm = &ibmvscsi_pm_ops,
 };
 
 static struct srp_function_template ibmvscsi_transport_functions = {
diff --git a/drivers/scsi/ibmvscsi/ibmvstgt.c b/drivers/scsi/ibmvscsi/ibmvstgt.c
index 2256babe0474..aa7ed81e9237 100644
--- a/drivers/scsi/ibmvscsi/ibmvstgt.c
+++ b/drivers/scsi/ibmvscsi/ibmvstgt.c
@@ -918,10 +918,7 @@ static struct vio_driver ibmvstgt_driver = {
 	.id_table = ibmvstgt_device_table,
 	.probe = ibmvstgt_probe,
 	.remove = ibmvstgt_remove,
-	.driver = {
-		.name = "ibmvscsis",
-		.owner = THIS_MODULE,
-	}
+	.name = "ibmvscsis",
 };
 
 static int get_system_info(void)
diff --git a/drivers/tty/hvc/hvc_vio.c b/drivers/tty/hvc/hvc_vio.c
index 3a0d53d6368f..ee307799271a 100644
--- a/drivers/tty/hvc/hvc_vio.c
+++ b/drivers/tty/hvc/hvc_vio.c
@@ -310,11 +310,8 @@ static int __devexit hvc_vio_remove(struct vio_dev *vdev)
 static struct vio_driver hvc_vio_driver = {
 	.id_table	= hvc_driver_table,
 	.probe		= hvc_vio_probe,
-	.remove		= __devexit_p(hvc_vio_remove),
-	.driver		= {
-		.name	= hvc_driver_name,
-		.owner	= THIS_MODULE,
-	}
+	.remove		= hvc_vio_remove,
+	.name		= hvc_driver_name,
 };
 
 static int __init hvc_vio_init(void)
diff --git a/drivers/tty/hvc/hvcs.c b/drivers/tty/hvc/hvcs.c
index d23759183b47..3436436fe2d7 100644
--- a/drivers/tty/hvc/hvcs.c
+++ b/drivers/tty/hvc/hvcs.c
@@ -879,10 +879,7 @@ static struct vio_driver hvcs_vio_driver = {
 	.id_table	= hvcs_driver_table,
 	.probe		= hvcs_probe,
 	.remove		= __devexit_p(hvcs_remove),
-	.driver		= {
-		.name	= hvcs_driver_name,
-		.owner	= THIS_MODULE,
-	}
+	.name		= hvcs_driver_name,
 };
 
 /* Only called from hvcs_get_pi please */

From 1ce447b90f3e71c81ae59e0062bc305ef267668b Mon Sep 17 00:00:00 2001
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Date: Mon, 26 Mar 2012 20:47:34 +0000
Subject: [PATCH 13/13] powerpc/perf: Fix instruction address sampling on 970
 and Power4

970 and Power4 don't support "continuous sampling" which means that
when we aren't in marked instruction sampling mode (marked events),
SIAR isn't updated with the last instruction sampled before the
perf interrupt. On those processors, we must thus use the exception
SRR0 value as the sampled instruction pointer.

Those processors also don't support the SIPR and SIHV bits in MMCRA
which means we need some kind of heuristic to decide if SIAR values
represent kernel or user addresses.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
 arch/powerpc/include/asm/perf_event_server.h |  2 +
 arch/powerpc/perf/core-book3s.c              | 46 +++++++++++++++++---
 arch/powerpc/perf/power4-pmu.c               |  1 +
 arch/powerpc/perf/ppc970-pmu.c               |  1 +
 4 files changed, 45 insertions(+), 5 deletions(-)

diff --git a/arch/powerpc/include/asm/perf_event_server.h b/arch/powerpc/include/asm/perf_event_server.h
index 1a8093fa8f71..078019b5b353 100644
--- a/arch/powerpc/include/asm/perf_event_server.h
+++ b/arch/powerpc/include/asm/perf_event_server.h
@@ -47,6 +47,8 @@ struct power_pmu {
  */
 #define PPMU_LIMITED_PMC5_6	1	/* PMC5/6 have limited function */
 #define PPMU_ALT_SIPR		2	/* uses alternate posn for SIPR/HV */
+#define PPMU_NO_SIPR		4	/* no SIPR/HV in MMCRA at all */
+#define PPMU_NO_CONT_SAMPLING	8	/* no continuous sampling */
 
 /*
  * Values for flags to get_alternatives()
diff --git a/arch/powerpc/perf/core-book3s.c b/arch/powerpc/perf/core-book3s.c
index c2e27ede07ec..02aee03e713c 100644
--- a/arch/powerpc/perf/core-book3s.c
+++ b/arch/powerpc/perf/core-book3s.c
@@ -116,14 +116,45 @@ static inline void perf_get_data_addr(struct pt_regs *regs, u64 *addrp)
 		*addrp = mfspr(SPRN_SDAR);
 }
 
+static inline u32 perf_flags_from_msr(struct pt_regs *regs)
+{
+	if (regs->msr & MSR_PR)
+		return PERF_RECORD_MISC_USER;
+	if ((regs->msr & MSR_HV) && freeze_events_kernel != MMCR0_FCHV)
+		return PERF_RECORD_MISC_HYPERVISOR;
+	return PERF_RECORD_MISC_KERNEL;
+}
+
 static inline u32 perf_get_misc_flags(struct pt_regs *regs)
 {
 	unsigned long mmcra = regs->dsisr;
 	unsigned long sihv = MMCRA_SIHV;
 	unsigned long sipr = MMCRA_SIPR;
 
+	/* Not a PMU interrupt: Make up flags from regs->msr */
 	if (TRAP(regs) != 0xf00)
-		return 0;	/* not a PMU interrupt */
+		return perf_flags_from_msr(regs);
+
+	/*
+	 * If we don't support continuous sampling and this
+	 * is not a marked event, same deal
+	 */
+	if ((ppmu->flags & PPMU_NO_CONT_SAMPLING) &&
+	    !(mmcra & MMCRA_SAMPLE_ENABLE))
+		return perf_flags_from_msr(regs);
+
+	/*
+	 * If we don't have flags in MMCRA, rather than using
+	 * the MSR, we intuit the flags from the address in
+	 * SIAR which should give slightly more reliable
+	 * results
+	 */
+	if (ppmu->flags & PPMU_NO_SIPR) {
+		unsigned long siar = mfspr(SPRN_SIAR);
+		if (siar >= PAGE_OFFSET)
+			return PERF_RECORD_MISC_KERNEL;
+		return PERF_RECORD_MISC_USER;
+	}
 
 	if (ppmu->flags & PPMU_ALT_SIPR) {
 		sihv = POWER6_MMCRA_SIHV;
@@ -1299,13 +1330,18 @@ unsigned long perf_misc_flags(struct pt_regs *regs)
  */
 unsigned long perf_instruction_pointer(struct pt_regs *regs)
 {
-	unsigned long ip;
+	unsigned long mmcra = regs->dsisr;
 
+	/* Not a PMU interrupt */
 	if (TRAP(regs) != 0xf00)
-		return regs->nip;	/* not a PMU interrupt */
+		return regs->nip;
 
-	ip = mfspr(SPRN_SIAR) + perf_ip_adjust(regs);
-	return ip;
+	/* Processor doesn't support sampling non marked events */
+	if ((ppmu->flags & PPMU_NO_CONT_SAMPLING) &&
+	    !(mmcra & MMCRA_SAMPLE_ENABLE))
+		return regs->nip;
+
+	return mfspr(SPRN_SIAR) + perf_ip_adjust(regs);
 }
 
 static bool pmc_overflow(unsigned long val)
diff --git a/arch/powerpc/perf/power4-pmu.c b/arch/powerpc/perf/power4-pmu.c
index b4f1dda4d089..9103a1de864d 100644
--- a/arch/powerpc/perf/power4-pmu.c
+++ b/arch/powerpc/perf/power4-pmu.c
@@ -607,6 +607,7 @@ static struct power_pmu power4_pmu = {
 	.n_generic		= ARRAY_SIZE(p4_generic_events),
 	.generic_events		= p4_generic_events,
 	.cache_events		= &power4_cache_events,
+	.flags			= PPMU_NO_SIPR | PPMU_NO_CONT_SAMPLING,
 };
 
 static int __init init_power4_pmu(void)
diff --git a/arch/powerpc/perf/ppc970-pmu.c b/arch/powerpc/perf/ppc970-pmu.c
index 111eb25bb0b6..20139ceeacf6 100644
--- a/arch/powerpc/perf/ppc970-pmu.c
+++ b/arch/powerpc/perf/ppc970-pmu.c
@@ -487,6 +487,7 @@ static struct power_pmu ppc970_pmu = {
 	.n_generic		= ARRAY_SIZE(ppc970_generic_events),
 	.generic_events		= ppc970_generic_events,
 	.cache_events		= &ppc970_cache_events,
+	.flags			= PPMU_NO_SIPR | PPMU_NO_CONT_SAMPLING,
 };
 
 static int __init init_ppc970_pmu(void)