Merge tag 'powerpc-6.2-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

Pull powerpc updates from Michael Ellerman:

 - Add powerpc qspinlock implementation optimised for large system
   scalability and paravirt. See the merge message for more details

 - Enable objtool to be built on powerpc to generate mcount locations

 - Use a temporary mm for code patching with the Radix MMU, so the
   writable mapping is restricted to the patching CPU

 - Add an option to build the 64-bit big-endian kernel with the ELFv2
   ABI

 - Sanitise user registers on interrupt entry on 64-bit Book3S

 - Many other small features and fixes

Thanks to Aboorva Devarajan, Angel Iglesias, Benjamin Gray, Bjorn
Helgaas, Bo Liu, Chen Lifu, Christoph Hellwig, Christophe JAILLET,
Christophe Leroy, Christopher M. Riedl, Colin Ian King, Deming Wang,
Disha Goel, Dmitry Torokhov, Finn Thain, Geert Uytterhoeven, Gustavo A.
R. Silva, Haowen Bai, Joel Stanley, Jordan Niethe, Julia Lawall, Kajol
Jain, Laurent Dufour, Li zeming, Miaoqian Lin, Michael Jeanson, Nathan
Lynch, Naveen N. Rao, Nayna Jain, Nicholas Miehlbradt, Nicholas Piggin,
Pali Rohár, Randy Dunlap, Rohan McLure, Russell Currey, Sathvika
Vasireddy, Shaomin Deng, Stephen Kitt, Stephen Rothwell, Thomas
Weißschuh, Tiezhu Yang, Uwe Kleine-König, Xie Shaowen, Xiu Jianfeng,
XueBing Chen, Yang Yingliang, Zhang Jiaming, ruanjinjie, Jessica Yu,
and Wolfram Sang.

* tag 'powerpc-6.2-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (181 commits)
  powerpc/code-patching: Fix oops with DEBUG_VM enabled
  powerpc/qspinlock: Fix 32-bit build
  powerpc/prom: Fix 32-bit build
  powerpc/rtas: mandate RTAS syscall filtering
  powerpc/rtas: define pr_fmt and convert printk call sites
  powerpc/rtas: clean up includes
  powerpc/rtas: clean up rtas_error_log_max initialization
  powerpc/pseries/eeh: use correct API for error log size
  powerpc/rtas: avoid scheduling in rtas_os_term()
  powerpc/rtas: avoid device tree lookups in rtas_os_term()
  powerpc/rtasd: use correct OF API for event scan rate
  powerpc/rtas: document rtas_call()
  powerpc/pseries: unregister VPA when hot unplugging a CPU
  powerpc/pseries: reset the RCU watchdogs after a LPM
  powerpc: Take in account addition CPU node when building kexec FDT
  powerpc: export the CPU node count
  powerpc/cpuidle: Set CPUIDLE_FLAG_POLLING for snooze state
  powerpc/dts/fsl: Fix pca954x i2c-mux node names
  cxl: Remove unnecessary cxl_pci_window_alignment()
  selftests/powerpc: Fix resource leaks
  ...

16 files changed, 240 insertions, 177 deletions

diff --git a/arch/powerpc/platforms/44x/warp.c b/arch/powerpc/platforms/44x/warp.c
index f03432ef010b..cefa313c09f0 100644
--- a/arch/powerpc/platforms/44x/warp.c
+++ b/arch/powerpc/platforms/44x/warp.c
@@ -5,15 +5,17 @@
  * Copyright (c) 2008-2009 PIKA Technologies
  *   Sean MacLennan <smaclennan@pikatech.com>
  */
+#include <linux/err.h>
 #include <linux/init.h>
 #include <linux/of_platform.h>
 #include <linux/kthread.h>
+#include <linux/leds.h>
 #include <linux/i2c.h>
 #include <linux/interrupt.h>
 #include <linux/delay.h>
 #include <linux/of_address.h>
 #include <linux/of_irq.h>
-#include <linux/of_gpio.h>
+#include <linux/gpio/consumer.h>
 #include <linux/slab.h>
 #include <linux/export.h>
 
@@ -92,8 +94,6 @@ static int __init warp_post_info(void)
 
 static LIST_HEAD(dtm_shutdown_list);
 static void __iomem *dtm_fpga;
-static unsigned green_led, red_led;
-
 
 struct dtm_shutdown {
 	struct list_head list;
@@ -101,7 +101,6 @@ struct dtm_shutdown {
 	void *arg;
 };
 
-
 int pika_dtm_register_shutdown(void (*func)(void *arg), void *arg)
 {
 	struct dtm_shutdown *shutdown;
@@ -132,6 +131,35 @@ int pika_dtm_unregister_shutdown(void (*func)(void *arg), void *arg)
 	return -EINVAL;
 }
 
+#define WARP_GREEN_LED	0
+#define WARP_RED_LED	1
+
+static struct gpio_led warp_gpio_led_pins[] = {
+	[WARP_GREEN_LED] = {
+		.name		= "green",
+		.default_state	= LEDS_DEFSTATE_KEEP,
+		.gpiod		= NULL, /* to be filled by pika_setup_leds() */
+	},
+	[WARP_RED_LED] = {
+		.name		= "red",
+		.default_state	= LEDS_DEFSTATE_KEEP,
+		.gpiod		= NULL, /* to be filled by pika_setup_leds() */
+	},
+};
+
+static struct gpio_led_platform_data warp_gpio_led_data = {
+	.leds		= warp_gpio_led_pins,
+	.num_leds	= ARRAY_SIZE(warp_gpio_led_pins),
+};
+
+static struct platform_device warp_gpio_leds = {
+	.name	= "leds-gpio",
+	.id	= -1,
+	.dev	= {
+		.platform_data = &warp_gpio_led_data,
+	},
+};
+
 static irqreturn_t temp_isr(int irq, void *context)
 {
 	struct dtm_shutdown *shutdown;
@@ -139,7 +167,7 @@ static irqreturn_t temp_isr(int irq, void *context)
 
 	local_irq_disable();
 
-	gpio_set_value(green_led, 0);
+	gpiod_set_value(warp_gpio_led_pins[WARP_GREEN_LED].gpiod, 0);
 
 	/* Run through the shutdown list. */
 	list_for_each_entry(shutdown, &dtm_shutdown_list, list)
@@ -153,7 +181,7 @@ static irqreturn_t temp_isr(int irq, void *context)
 			out_be32(dtm_fpga + 0x14, reset);
 		}
 
-		gpio_set_value(red_led, value);
+		gpiod_set_value(warp_gpio_led_pins[WARP_RED_LED].gpiod, value);
 		value ^= 1;
 		mdelay(500);
 	}
@@ -162,25 +190,78 @@ static irqreturn_t temp_isr(int irq, void *context)
 	return IRQ_HANDLED;
 }
 
+/*
+ * Because green and red power LEDs are normally driven by leds-gpio driver,
+ * but in case of critical temperature shutdown we want to drive them
+ * ourselves, we acquire both and then create leds-gpio platform device
+ * ourselves, instead of doing it through device tree. This way we can still
+ * keep access to the gpios and use them when needed.
+ */
 static int pika_setup_leds(void)
 {
 	struct device_node *np, *child;
+	struct gpio_desc *gpio;
+	struct gpio_led *led;
+	int led_count = 0;
+	int error;
+	int i;
 
-	np = of_find_compatible_node(NULL, NULL, "gpio-leds");
+	np = of_find_compatible_node(NULL, NULL, "warp-power-leds");
 	if (!np) {
 		printk(KERN_ERR __FILE__ ": Unable to find leds\n");
 		return -ENOENT;
 	}
 
-	for_each_child_of_node(np, child)
-		if (of_node_name_eq(child, "green"))
-			green_led = of_get_gpio(child, 0);
-		else if (of_node_name_eq(child, "red"))
-			red_led = of_get_gpio(child, 0);
+	for_each_child_of_node(np, child) {
+		for (i = 0; i < ARRAY_SIZE(warp_gpio_led_pins); i++) {
+			led = &warp_gpio_led_pins[i];
+
+			if (!of_node_name_eq(child, led->name))
+				continue;
+
+			if (led->gpiod) {
+				printk(KERN_ERR __FILE__ ": %s led has already been defined\n",
+				       led->name);
+				continue;
+			}
+
+			gpio = fwnode_gpiod_get_index(of_fwnode_handle(child),
+						      NULL, 0, GPIOD_ASIS,
+						      led->name);
+			error = PTR_ERR_OR_ZERO(gpio);
+			if (error) {
+				printk(KERN_ERR __FILE__ ": Failed to get %s led gpio: %d\n",
+				       led->name, error);
+				of_node_put(child);
+				goto err_cleanup_pins;
+			}
+
+			led->gpiod = gpio;
+			led_count++;
+		}
+	}
 
 	of_node_put(np);
 
+	/* Skip device registration if no leds have been defined */
+	if (led_count) {
+		error = platform_device_register(&warp_gpio_leds);
+		if (error) {
+			printk(KERN_ERR __FILE__ ": Unable to add leds-gpio: %d\n",
+			       error);
+			goto err_cleanup_pins;
+		}
+	}
+
 	return 0;
+
+err_cleanup_pins:
+	for (i = 0; i < ARRAY_SIZE(warp_gpio_led_pins); i++) {
+		led = &warp_gpio_led_pins[i];
+		gpiod_put(led->gpiod);
+		led->gpiod = NULL;
+	}
+	return error;
 }
 
 static void pika_setup_critical_temp(struct device_node *np,
diff --git a/arch/powerpc/platforms/52xx/lite5200_sleep.S b/arch/powerpc/platforms/52xx/lite5200_sleep.S
index afee8b1515a8..0b12647e7b42 100644
--- a/arch/powerpc/platforms/52xx/lite5200_sleep.S
+++ b/arch/powerpc/platforms/52xx/lite5200_sleep.S
@@ -1,4 +1,6 @@
 /* SPDX-License-Identifier: GPL-2.0 */
+#include <linux/linkage.h>
+
 #include <asm/reg.h>
 #include <asm/ppc_asm.h>
 #include <asm/processor.h>
@@ -178,7 +180,8 @@ sram_code:
 
 
 	/* local udelay in sram is needed */
-  udelay: /* r11 - tb_ticks_per_usec, r12 - usecs, overwrites r13 */
+SYM_FUNC_START_LOCAL(udelay)
+	/* r11 - tb_ticks_per_usec, r12 - usecs, overwrites r13 */
 	mullw	r12, r12, r11
 	mftb	r13	/* start */
 	add	r12, r13, r12 /* end */
@@ -187,6 +190,7 @@ sram_code:
 	cmp	cr0, r13, r12
 	blt	1b
 	blr
+SYM_FUNC_END(udelay)
 
 sram_code_end:
 
@@ -271,7 +275,7 @@ _ASM_NOKPROBE_SYMBOL(lite5200_wakeup)
 	SAVE_SR(n+2, addr+2);	\
 	SAVE_SR(n+3, addr+3);
 
-save_regs:
+SYM_FUNC_START_LOCAL(save_regs)
 	stw	r0, 0(r4)
 	stw	r1, 0x4(r4)
 	stw	r2, 0x8(r4)
@@ -317,6 +321,7 @@ save_regs:
 	SAVE_SPRN(TBRU,  0x5b)
 
 	blr
+SYM_FUNC_END(save_regs)
 
 
 /* restore registers */
@@ -336,7 +341,7 @@ save_regs:
 	LOAD_SR(n+2, addr+2);	\
 	LOAD_SR(n+3, addr+3);
 
-restore_regs:
+SYM_FUNC_START_LOCAL(restore_regs)
 	lis	r4, registers@h
 	ori	r4, r4, registers@l
 
@@ -393,6 +398,7 @@ restore_regs:
 
 	blr
 _ASM_NOKPROBE_SYMBOL(restore_regs)
+SYM_FUNC_END(restore_regs)
 
 
 
@@ -403,7 +409,7 @@ _ASM_NOKPROBE_SYMBOL(restore_regs)
  * Flush data cache
  * Do this by just reading lots of stuff into the cache.
  */
-flush_data_cache:
+SYM_FUNC_START_LOCAL(flush_data_cache)
 	lis	r3,CONFIG_KERNEL_START@h
 	ori	r3,r3,CONFIG_KERNEL_START@l
 	li	r4,NUM_CACHE_LINES
@@ -413,3 +419,4 @@ flush_data_cache:
 	addi	r3,r3,L1_CACHE_BYTES	/* Next line, please */
 	bdnz	1b
 	blr
+SYM_FUNC_END(flush_data_cache)
diff --git a/arch/powerpc/platforms/52xx/mpc52xx_lpbfifo.c b/arch/powerpc/platforms/52xx/mpc52xx_lpbfifo.c
index 48038aaedbd3..6d1dd6e87478 100644
--- a/arch/powerpc/platforms/52xx/mpc52xx_lpbfifo.c
+++ b/arch/powerpc/platforms/52xx/mpc52xx_lpbfifo.c
@@ -59,6 +59,8 @@ static struct mpc52xx_lpbfifo lpbfifo;
 
 /**
  * mpc52xx_lpbfifo_kick - Trigger the next block of data to be transferred
+ *
+ * @req: Pointer to request structure
  */
 static void mpc52xx_lpbfifo_kick(struct mpc52xx_lpbfifo_request *req)
 {
@@ -178,6 +180,8 @@ static void mpc52xx_lpbfifo_kick(struct mpc52xx_lpbfifo_request *req)
 
 /**
  * mpc52xx_lpbfifo_irq - IRQ handler for LPB FIFO
+ * @irq: IRQ number to be handled
+ * @dev_id: device ID cookie
  *
  * On transmit, the dma completion irq triggers before the fifo completion
  * triggers.  Handle the dma completion here instead of the LPB FIFO Bestcomm
@@ -216,6 +220,8 @@ static void mpc52xx_lpbfifo_kick(struct mpc52xx_lpbfifo_request *req)
  * or nested spinlock condition.  The out path is non-trivial, so
  * extra fiddling is done to make sure all paths lead to the same
  * outbound code.
+ *
+ * Return: irqreturn code (%IRQ_HANDLED)
  */
 static irqreturn_t mpc52xx_lpbfifo_irq(int irq, void *dev_id)
 {
@@ -320,8 +326,12 @@ static irqreturn_t mpc52xx_lpbfifo_irq(int irq, void *dev_id)
 
 /**
  * mpc52xx_lpbfifo_bcom_irq - IRQ handler for LPB FIFO Bestcomm task
+ * @irq: IRQ number to be handled
+ * @dev_id: device ID cookie
  *
  * Only used when receiving data.
+ *
+ * Return: irqreturn code (%IRQ_HANDLED)
  */
 static irqreturn_t mpc52xx_lpbfifo_bcom_irq(int irq, void *dev_id)
 {
@@ -372,7 +382,7 @@ static irqreturn_t mpc52xx_lpbfifo_bcom_irq(int irq, void *dev_id)
 }
 
 /**
- * mpc52xx_lpbfifo_bcom_poll - Poll for DMA completion
+ * mpc52xx_lpbfifo_poll - Poll for DMA completion
  */
 void mpc52xx_lpbfifo_poll(void)
 {
@@ -393,6 +403,8 @@ EXPORT_SYMBOL(mpc52xx_lpbfifo_poll);
 /**
  * mpc52xx_lpbfifo_submit - Submit an LPB FIFO transfer request.
  * @req: Pointer to request structure
+ *
+ * Return: %0 on success, -errno code on error
  */
 int mpc52xx_lpbfifo_submit(struct mpc52xx_lpbfifo_request *req)
 {
@@ -531,6 +543,7 @@ static int mpc52xx_lpbfifo_probe(struct platform_device *op)
  err_bcom_rx_irq:
 	bcom_gen_bd_rx_release(lpbfifo.bcom_rx_task);
  err_bcom_rx:
+	free_irq(lpbfifo.irq, &lpbfifo);
  err_irq:
 	iounmap(lpbfifo.regs);
 	lpbfifo.regs = NULL;
diff --git a/arch/powerpc/platforms/83xx/mpc832x_rdb.c b/arch/powerpc/platforms/83xx/mpc832x_rdb.c
index e12cb44e717f..caa96edf0e72 100644
--- a/arch/powerpc/platforms/83xx/mpc832x_rdb.c
+++ b/arch/powerpc/platforms/83xx/mpc832x_rdb.c
@@ -107,7 +107,7 @@ static int __init of_fsl_spi_probe(char *type, char *compatible, u32 sysclk,
 
 		goto next;
 unreg:
-		platform_device_del(pdev);
+		platform_device_put(pdev);
 err:
 		pr_err("%pOF: registration failed\n", np);
 next:
diff --git a/arch/powerpc/platforms/85xx/sgy_cts1000.c b/arch/powerpc/platforms/85xx/sgy_cts1000.c
index e14d1b74d4e4..751395cbf022 100644
--- a/arch/powerpc/platforms/85xx/sgy_cts1000.c
+++ b/arch/powerpc/platforms/85xx/sgy_cts1000.c
@@ -7,10 +7,13 @@
  * Copyright 2012 by Servergy, Inc.
  */
 
+#define pr_fmt(fmt) "gpio-halt: " fmt
+
+#include <linux/err.h>
 #include <linux/platform_device.h>
 #include <linux/device.h>
+#include <linux/gpio/consumer.h>
 #include <linux/module.h>
-#include <linux/of_gpio.h>
 #include <linux/of_irq.h>
 #include <linux/workqueue.h>
 #include <linux/reboot.h>
@@ -18,7 +21,8 @@
 
 #include <asm/machdep.h>
 
-static struct device_node *halt_node;
+static struct gpio_desc *halt_gpio;
+static int halt_irq;
 
 static const struct of_device_id child_match[] = {
 	{
@@ -36,23 +40,10 @@ static DECLARE_WORK(gpio_halt_wq, gpio_halt_wfn);
 
 static void __noreturn gpio_halt_cb(void)
 {
-	enum of_gpio_flags flags;
-	int trigger, gpio;
-
-	if (!halt_node)
-		panic("No reset GPIO information was provided in DT\n");
-
-	gpio = of_get_gpio_flags(halt_node, 0, &flags);
-
-	if (!gpio_is_valid(gpio))
-		panic("Provided GPIO is invalid\n");
-
-	trigger = (flags == OF_GPIO_ACTIVE_LOW);
-
-	printk(KERN_INFO "gpio-halt: triggering GPIO.\n");
+	pr_info("triggering GPIO.\n");
 
 	/* Probably wont return */
-	gpio_set_value(gpio, trigger);
+	gpiod_set_value(halt_gpio, 1);
 
 	panic("Halt failed\n");
 }
@@ -61,95 +52,78 @@ static void __noreturn gpio_halt_cb(void)
  * to handle the shutdown/poweroff. */
 static irqreturn_t gpio_halt_irq(int irq, void *__data)
 {
-	printk(KERN_INFO "gpio-halt: shutdown due to power button IRQ.\n");
+	struct platform_device *pdev = __data;
+
+	dev_info(&pdev->dev, "scheduling shutdown due to power button IRQ\n");
 	schedule_work(&gpio_halt_wq);
 
         return IRQ_HANDLED;
 };
 
-static int gpio_halt_probe(struct platform_device *pdev)
+static int __gpio_halt_probe(struct platform_device *pdev,
+			     struct device_node *halt_node)
 {
-	enum of_gpio_flags flags;
-	struct device_node *node = pdev->dev.of_node;
-	struct device_node *child_node;
-	int gpio, err, irq;
-	int trigger;
-
-	if (!node)
-		return -ENODEV;
-
-	/* If there's no matching child, this isn't really an error */
-	child_node = of_find_matching_node(node, child_match);
-	if (!child_node)
-		return 0;
-
-	/* Technically we could just read the first one, but punish
-	 * DT writers for invalid form. */
-	if (of_gpio_count(child_node) != 1) {
-		err = -EINVAL;
-		goto err_put;
-	}
-
-	/* Get the gpio number relative to the dynamic base. */
-	gpio = of_get_gpio_flags(child_node, 0, &flags);
-	if (!gpio_is_valid(gpio)) {
-		err = -EINVAL;
-		goto err_put;
-	}
+	int err;
 
-	err = gpio_request(gpio, "gpio-halt");
+	halt_gpio = fwnode_gpiod_get_index(of_fwnode_handle(halt_node),
+					   NULL, 0, GPIOD_OUT_LOW, "gpio-halt");
+	err = PTR_ERR_OR_ZERO(halt_gpio);
 	if (err) {
-		printk(KERN_ERR "gpio-halt: error requesting GPIO %d.\n",
-		       gpio);
-		goto err_put;
+		dev_err(&pdev->dev, "failed to request halt GPIO: %d\n", err);
+		return err;
 	}
 
-	trigger = (flags == OF_GPIO_ACTIVE_LOW);
-
-	gpio_direction_output(gpio, !trigger);
-
 	/* Now get the IRQ which tells us when the power button is hit */
-	irq = irq_of_parse_and_map(child_node, 0);
-	err = request_irq(irq, gpio_halt_irq, IRQF_TRIGGER_RISING |
-			  IRQF_TRIGGER_FALLING, "gpio-halt", child_node);
+	halt_irq = irq_of_parse_and_map(halt_node, 0);
+	err = request_irq(halt_irq, gpio_halt_irq,
+			  IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
+			  "gpio-halt", pdev);
 	if (err) {
-		printk(KERN_ERR "gpio-halt: error requesting IRQ %d for "
-		       "GPIO %d.\n", irq, gpio);
-		gpio_free(gpio);
-		goto err_put;
+		dev_err(&pdev->dev, "failed to request IRQ %d: %d\n",
+			halt_irq, err);
+		gpiod_put(halt_gpio);
+		halt_gpio = NULL;
+		return err;
 	}
 
 	/* Register our halt function */
 	ppc_md.halt = gpio_halt_cb;
 	pm_power_off = gpio_halt_cb;
 
-	printk(KERN_INFO "gpio-halt: registered GPIO %d (%d trigger, %d"
-	       " irq).\n", gpio, trigger, irq);
+	dev_info(&pdev->dev, "registered halt GPIO, irq: %d\n", halt_irq);
 
-	halt_node = child_node;
 	return 0;
-
-err_put:
-	of_node_put(child_node);
-	return err;
 }
 
-static int gpio_halt_remove(struct platform_device *pdev)
+static int gpio_halt_probe(struct platform_device *pdev)
 {
-	if (halt_node) {
-		int gpio = of_get_gpio(halt_node, 0);
-		int irq = irq_of_parse_and_map(halt_node, 0);
+	struct device_node *halt_node;
+	int ret;
+
+	if (!pdev->dev.of_node)
+		return -ENODEV;
+
+	/* If there's no matching child, this isn't really an error */
+	halt_node = of_find_matching_node(pdev->dev.of_node, child_match);
+	if (!halt_node)
+		return -ENODEV;
+
+	ret = __gpio_halt_probe(pdev, halt_node);
+	of_node_put(halt_node);
 
-		free_irq(irq, halt_node);
+	return ret;
+}
 
-		ppc_md.halt = NULL;
-		pm_power_off = NULL;
+static int gpio_halt_remove(struct platform_device *pdev)
+{
+	free_irq(halt_irq, pdev);
+	cancel_work_sync(&gpio_halt_wq);
 
-		gpio_free(gpio);
+	ppc_md.halt = NULL;
+	pm_power_off = NULL;
 
-		of_node_put(halt_node);
-		halt_node = NULL;
-	}
+	gpiod_put(halt_gpio);
+	halt_gpio = NULL;
 
 	return 0;
 }
diff --git a/arch/powerpc/platforms/Kconfig.cputype b/arch/powerpc/platforms/Kconfig.cputype
index 0c4eed9aea80..9563336e3348 100644
--- a/arch/powerpc/platforms/Kconfig.cputype
+++ b/arch/powerpc/platforms/Kconfig.cputype
@@ -135,6 +135,7 @@ config GENERIC_CPU
 	depends on PPC_BOOK3S_64 && CPU_LITTLE_ENDIAN
 	select ARCH_HAS_FAST_MULTIPLIER
 	select PPC_64S_HASH_MMU
+	select PPC_HAS_LBARX_LHARX
 
 config POWERPC_CPU
 	bool "Generic 32 bits powerpc"
@@ -160,17 +161,20 @@ config POWER7_CPU
 	depends on PPC_BOOK3S_64
 	select ARCH_HAS_FAST_MULTIPLIER
 	select PPC_64S_HASH_MMU
+	select PPC_HAS_LBARX_LHARX
 
 config POWER8_CPU
 	bool "POWER8"
 	depends on PPC_BOOK3S_64
 	select ARCH_HAS_FAST_MULTIPLIER
 	select PPC_64S_HASH_MMU
+	select PPC_HAS_LBARX_LHARX
 
 config POWER9_CPU
 	bool "POWER9"
 	depends on PPC_BOOK3S_64
 	select ARCH_HAS_FAST_MULTIPLIER
+	select PPC_HAS_LBARX_LHARX
 
 config POWER10_CPU
 	bool "POWER10"
@@ -184,6 +188,7 @@ config E5500_CPU
 config E6500_CPU
 	bool "Freescale e6500"
 	depends on PPC64 && PPC_E500
+	select PPC_HAS_LBARX_LHARX
 
 config 405_CPU
 	bool "40x family"
@@ -575,10 +580,10 @@ config CPU_LITTLE_ENDIAN
 endchoice
 
 config PPC64_ELF_ABI_V1
-	def_bool PPC64 && CPU_BIG_ENDIAN
+	def_bool PPC64 && (CPU_BIG_ENDIAN && !PPC64_BIG_ENDIAN_ELF_ABI_V2)
 
 config PPC64_ELF_ABI_V2
-	def_bool PPC64 && CPU_LITTLE_ENDIAN
+	def_bool PPC64 && !PPC64_ELF_ABI_V1
 
 config PPC64_BOOT_WRAPPER
 	def_bool n
diff --git a/arch/powerpc/platforms/pasemi/gpio_mdio.c b/arch/powerpc/platforms/pasemi/gpio_mdio.c
index bf300167ad6b..913b77b92cea 100644
--- a/arch/powerpc/platforms/pasemi/gpio_mdio.c
+++ b/arch/powerpc/platforms/pasemi/gpio_mdio.c
@@ -294,7 +294,7 @@ static struct platform_driver gpio_mdio_driver =
 	},
 };
 
-static int gpio_mdio_init(void)
+static int __init gpio_mdio_init(void)
 {
 	struct device_node *np;
 
@@ -314,7 +314,7 @@ static int gpio_mdio_init(void)
 }
 module_init(gpio_mdio_init);
 
-static void gpio_mdio_exit(void)
+static void __exit gpio_mdio_exit(void)
 {
 	platform_driver_unregister(&gpio_mdio_driver);
 	if (gpio_regs)
diff --git a/arch/powerpc/platforms/powermac/setup.c b/arch/powerpc/platforms/powermac/setup.c
index 04daa7f0a03c..4f7ee885a78f 100644
--- a/arch/powerpc/platforms/powermac/setup.c
+++ b/arch/powerpc/platforms/powermac/setup.c
@@ -70,9 +70,7 @@
 
 #undef SHOW_GATWICK_IRQS
 
-int ppc_override_l2cr = 0;
-int ppc_override_l2cr_value;
-int has_l2cache = 0;
+static int has_l2cache;
 
 int pmac_newworld;
 
@@ -236,22 +234,16 @@ static void __init l2cr_init(void)
 			const unsigned int *l2cr =
 				of_get_property(np, "l2cr-value", NULL);
 			if (l2cr) {
-				ppc_override_l2cr = 1;
-				ppc_override_l2cr_value = *l2cr;
 				_set_L2CR(0);
-				_set_L2CR(ppc_override_l2cr_value);
+				_set_L2CR(*l2cr);
+				pr_info("L2CR overridden (0x%x), backside cache is %s\n",
+					*l2cr, ((*l2cr) & 0x80000000) ?
+					"enabled" : "disabled");
 			}
 			of_node_put(np);
 			break;
 		}
 	}
-
-	if (ppc_override_l2cr)
-		printk(KERN_INFO "L2CR overridden (0x%x), "
-		       "backside cache is %s\n",
-		       ppc_override_l2cr_value,
-		       (ppc_override_l2cr_value & 0x80000000)
-				? "enabled" : "disabled");
 }
 #endif
 
diff --git a/arch/powerpc/platforms/ps3/system-bus.c b/arch/powerpc/platforms/ps3/system-bus.c
index 2502e9b17df4..38a7e02295c8 100644
--- a/arch/powerpc/platforms/ps3/system-bus.c
+++ b/arch/powerpc/platforms/ps3/system-bus.c
@@ -466,7 +466,7 @@ static struct attribute *ps3_system_bus_dev_attrs[] = {
 };
 ATTRIBUTE_GROUPS(ps3_system_bus_dev);
 
-struct bus_type ps3_system_bus_type = {
+static struct bus_type ps3_system_bus_type = {
 	.name = "ps3_system_bus",
 	.match = ps3_system_bus_match,
 	.uevent = ps3_system_bus_uevent,
diff --git a/arch/powerpc/platforms/pseries/eeh_pseries.c b/arch/powerpc/platforms/pseries/eeh_pseries.c
index 8e40ccac0f44..6b507b62ce8f 100644
--- a/arch/powerpc/platforms/pseries/eeh_pseries.c
+++ b/arch/powerpc/platforms/pseries/eeh_pseries.c
@@ -154,7 +154,7 @@ static int pseries_eeh_get_pe_config_addr(struct pci_dn *pdn)
 /**
  * pseries_eeh_phb_reset - Reset the specified PHB
  * @phb: PCI controller
- * @config_adddr: the associated config address
+ * @config_addr: the associated config address
  * @option: reset option
  *
  * Reset the specified PHB/PE
@@ -188,7 +188,7 @@ static int pseries_eeh_phb_reset(struct pci_controller *phb, int config_addr, in
 /**
  * pseries_eeh_phb_configure_bridge - Configure PCI bridges in the indicated PE
  * @phb: PCI controller
- * @config_adddr: the associated config address
+ * @config_addr: the associated config address
  *
  * The function will be called to reconfigure the bridges included
  * in the specified PE so that the mulfunctional PE would be recovered
@@ -848,16 +848,7 @@ static int __init eeh_pseries_init(void)
 	}
 
 	/* Initialize error log size */
-	eeh_error_buf_size = rtas_token("rtas-error-log-max");
-	if (eeh_error_buf_size == RTAS_UNKNOWN_SERVICE) {
-		pr_info("%s: unknown EEH error log size\n",
-			__func__);
-		eeh_error_buf_size = 1024;
-	} else if (eeh_error_buf_size > RTAS_ERROR_LOG_MAX) {
-		pr_info("%s: EEH error log size %d exceeds the maximal %d\n",
-			__func__, eeh_error_buf_size, RTAS_ERROR_LOG_MAX);
-		eeh_error_buf_size = RTAS_ERROR_LOG_MAX;
-	}
+	eeh_error_buf_size = rtas_get_error_log_max();
 
 	/* Set EEH probe mode */
 	eeh_add_flag(EEH_PROBE_MODE_DEVTREE | EEH_ENABLE_IO_FOR_LOG);
diff --git a/arch/powerpc/platforms/pseries/hotplug-cpu.c b/arch/powerpc/platforms/pseries/hotplug-cpu.c
index e0a7ac5db15d..090ae5a1e0f5 100644
--- a/arch/powerpc/platforms/pseries/hotplug-cpu.c
+++ b/arch/powerpc/platforms/pseries/hotplug-cpu.c
@@ -70,6 +70,7 @@ static void pseries_cpu_offline_self(void)
 		xics_teardown_cpu();
 
 	unregister_slb_shadow(hwcpu);
+	unregister_vpa(hwcpu);
 	rtas_stop_self();
 
 	/* Should never get here... */
diff --git a/arch/powerpc/platforms/pseries/hvCall.S b/arch/powerpc/platforms/pseries/hvCall.S
index 762eb15d3bd4..783c16ad648b 100644
--- a/arch/powerpc/platforms/pseries/hvCall.S
+++ b/arch/powerpc/platforms/pseries/hvCall.S
@@ -27,7 +27,9 @@ hcall_tracepoint_refcount:
 
 /*
  * precall must preserve all registers.  use unused STK_PARAM()
- * areas to save snapshots and opcode.
+ * areas to save snapshots and opcode. STK_PARAM() in the caller's
+ * frame will be available even on ELFv2 because these are all
+ * variadic functions.
  */
 #define HCALL_INST_PRECALL(FIRST_REG)				\
 	mflr	r0;						\
@@ -41,29 +43,29 @@ hcall_tracepoint_refcount:
 	std	r10,STK_PARAM(R10)(r1);				\
 	std	r0,16(r1);					\
 	addi	r4,r1,STK_PARAM(FIRST_REG);			\
-	stdu	r1,-STACK_FRAME_OVERHEAD(r1);			\
+	stdu	r1,-STACK_FRAME_MIN_SIZE(r1);			\
 	bl	__trace_hcall_entry;				\
-	ld	r3,STACK_FRAME_OVERHEAD+STK_PARAM(R3)(r1);	\
-	ld	r4,STACK_FRAME_OVERHEAD+STK_PARAM(R4)(r1);	\
-	ld	r5,STACK_FRAME_OVERHEAD+STK_PARAM(R5)(r1);	\
-	ld	r6,STACK_FRAME_OVERHEAD+STK_PARAM(R6)(r1);	\
-	ld	r7,STACK_FRAME_OVERHEAD+STK_PARAM(R7)(r1);	\
-	ld	r8,STACK_FRAME_OVERHEAD+STK_PARAM(R8)(r1);	\
-	ld	r9,STACK_FRAME_OVERHEAD+STK_PARAM(R9)(r1);	\
-	ld	r10,STACK_FRAME_OVERHEAD+STK_PARAM(R10)(r1)
+	ld	r3,STACK_FRAME_MIN_SIZE+STK_PARAM(R3)(r1);	\
+	ld	r4,STACK_FRAME_MIN_SIZE+STK_PARAM(R4)(r1);	\
+	ld	r5,STACK_FRAME_MIN_SIZE+STK_PARAM(R5)(r1);	\
+	ld	r6,STACK_FRAME_MIN_SIZE+STK_PARAM(R6)(r1);	\
+	ld	r7,STACK_FRAME_MIN_SIZE+STK_PARAM(R7)(r1);	\
+	ld	r8,STACK_FRAME_MIN_SIZE+STK_PARAM(R8)(r1);	\
+	ld	r9,STACK_FRAME_MIN_SIZE+STK_PARAM(R9)(r1);	\
+	ld	r10,STACK_FRAME_MIN_SIZE+STK_PARAM(R10)(r1)
 
 /*
  * postcall is performed immediately before function return which
  * allows liberal use of volatile registers.
  */
 #define __HCALL_INST_POSTCALL					\
-	ld	r0,STACK_FRAME_OVERHEAD+STK_PARAM(R3)(r1);	\
-	std	r3,STACK_FRAME_OVERHEAD+STK_PARAM(R3)(r1);	\
+	ld	r0,STACK_FRAME_MIN_SIZE+STK_PARAM(R3)(r1);	\
+	std	r3,STACK_FRAME_MIN_SIZE+STK_PARAM(R3)(r1);	\
 	mr	r4,r3;						\
 	mr	r3,r0;						\
 	bl	__trace_hcall_exit;				\
-	ld	r0,STACK_FRAME_OVERHEAD+16(r1);			\
-	addi	r1,r1,STACK_FRAME_OVERHEAD;			\
+	ld	r0,STACK_FRAME_MIN_SIZE+16(r1);			\
+	addi	r1,r1,STACK_FRAME_MIN_SIZE;			\
 	ld	r3,STK_PARAM(R3)(r1);				\
 	mtlr	r0
 
@@ -303,14 +305,14 @@ plpar_hcall9_trace:
 	mr	r7,r8
 	mr	r8,r9
 	mr	r9,r10
-	ld	r10,STACK_FRAME_OVERHEAD+STK_PARAM(R11)(r1)
-	ld	r11,STACK_FRAME_OVERHEAD+STK_PARAM(R12)(r1)
-	ld	r12,STACK_FRAME_OVERHEAD+STK_PARAM(R13)(r1)
+	ld	r10,STACK_FRAME_MIN_SIZE+STK_PARAM(R11)(r1)
+	ld	r11,STACK_FRAME_MIN_SIZE+STK_PARAM(R12)(r1)
+	ld	r12,STACK_FRAME_MIN_SIZE+STK_PARAM(R13)(r1)
 
 	HVSC
 
 	mr	r0,r12
-	ld	r12,STACK_FRAME_OVERHEAD+STK_PARAM(R4)(r1)
+	ld	r12,STACK_FRAME_MIN_SIZE+STK_PARAM(R4)(r1)
 	std	r4,0(r12)
 	std	r5,8(r12)
 	std	r6,16(r12)
diff --git a/arch/powerpc/platforms/pseries/iommu.c b/arch/powerpc/platforms/pseries/iommu.c
index 561adac69022..c74b71d4733d 100644
--- a/arch/powerpc/platforms/pseries/iommu.c
+++ b/arch/powerpc/platforms/pseries/iommu.c
@@ -248,7 +248,7 @@ static int tce_buildmulti_pSeriesLP(struct iommu_table *tbl, long tcenum,
 		 * Set up the page with TCE data, looping through and setting
 		 * the values.
 		 */
-		limit = min_t(long, npages, 4096/TCE_ENTRY_SIZE);
+		limit = min_t(long, npages, 4096 / TCE_ENTRY_SIZE);
 
 		for (l = 0; l < limit; l++) {
 			tcep[l] = cpu_to_be64(proto_tce | rpn << tceshift);
diff --git a/arch/powerpc/platforms/pseries/mobility.c b/arch/powerpc/platforms/pseries/mobility.c
index 634fac5db3f9..4cea71aa0f41 100644
--- a/arch/powerpc/platforms/pseries/mobility.c
+++ b/arch/powerpc/platforms/pseries/mobility.c
@@ -635,10 +635,13 @@ retry:
 		prod_others();
 	}
 	/*
-	 * Execution may have been suspended for several seconds, so
-	 * reset the watchdog.
+	 * Execution may have been suspended for several seconds, so reset
+	 * the watchdogs. touch_nmi_watchdog() also touches the soft lockup
+	 * watchdog.
 	 */
+	rcu_cpu_stall_reset();
 	touch_nmi_watchdog();
+
 	return ret;
 }
 
diff --git a/arch/powerpc/platforms/pseries/plpks.c b/arch/powerpc/platforms/pseries/plpks.c
index f4b5b5a64db3..4edd1585e245 100644
--- a/arch/powerpc/platforms/pseries/plpks.c
+++ b/arch/powerpc/platforms/pseries/plpks.c
@@ -75,7 +75,7 @@ static int pseries_status_to_err(int rc)
 	case H_FUNCTION:
 		err = -ENXIO;
 		break;
-	case H_P1:
+	case H_PARAMETER:
 	case H_P2:
 	case H_P3:
 	case H_P4:
@@ -111,7 +111,7 @@ static int pseries_status_to_err(int rc)
 		err = -EEXIST;
 		break;
 	case H_ABORTED:
-		err = -EINTR;
+		err = -EIO;
 		break;
 	default:
 		err = -EINVAL;
@@ -162,19 +162,15 @@ static struct plpks_auth *construct_auth(u8 consumer)
 	if (consumer > PKS_OS_OWNER)
 		return ERR_PTR(-EINVAL);
 
-	auth = kmalloc(struct_size(auth, password, maxpwsize), GFP_KERNEL);
+	auth = kzalloc(struct_size(auth, password, maxpwsize), GFP_KERNEL);
 	if (!auth)
 		return ERR_PTR(-ENOMEM);
 
 	auth->version = 1;
 	auth->consumer = consumer;
-	auth->rsvd0 = 0;
-	auth->rsvd1 = 0;
 
-	if (consumer == PKS_FW_OWNER || consumer == PKS_BOOTLOADER_OWNER) {
-		auth->passwordlength = 0;
+	if (consumer == PKS_FW_OWNER || consumer == PKS_BOOTLOADER_OWNER)
 		return auth;
-	}
 
 	memcpy(auth->password, ospassword, ospasswordlength);
 
@@ -312,10 +308,6 @@ int plpks_write_var(struct plpks_var var)
 	if (!rc)
 		rc = plpks_confirm_object_flushed(label, auth);
 
-	if (rc)
-		pr_err("Failed to write variable %s for component %s with error %d\n",
-		       var.name, var.component, rc);
-
 	rc = pseries_status_to_err(rc);
 	kfree(label);
 out:
@@ -350,10 +342,6 @@ int plpks_remove_var(char *component, u8 varos, struct plpks_var_name vname)
 	if (!rc)
 		rc = plpks_confirm_object_flushed(label, auth);
 
-	if (rc)
-		pr_err("Failed to remove variable %s for component %s with error %d\n",
-		       vname.name, component, rc);
-
 	rc = pseries_status_to_err(rc);
 	kfree(label);
 out:
@@ -366,22 +354,24 @@ static int plpks_read_var(u8 consumer, struct plpks_var *var)
 {
 	unsigned long retbuf[PLPAR_HCALL_BUFSIZE] = { 0 };
 	struct plpks_auth *auth;
-	struct label *label;
+	struct label *label = NULL;
 	u8 *output;
 	int rc;
 
 	if (var->namelen > MAX_NAME_SIZE)
 		return -EINVAL;
 
-	auth = construct_auth(PKS_OS_OWNER);
+	auth = construct_auth(consumer);
 	if (IS_ERR(auth))
 		return PTR_ERR(auth);
 
-	label = construct_label(var->component, var->os, var->name,
-				var->namelen);
-	if (IS_ERR(label)) {
-		rc = PTR_ERR(label);
-		goto out_free_auth;
+	if (consumer == PKS_OS_OWNER) {
+		label = construct_label(var->component, var->os, var->name,
+					var->namelen);
+		if (IS_ERR(label)) {
+			rc = PTR_ERR(label);
+			goto out_free_auth;
+		}
 	}
 
 	output = kzalloc(maxobjsize, GFP_KERNEL);
@@ -390,13 +380,17 @@ static int plpks_read_var(u8 consumer, struct plpks_var *var)
 		goto out_free_label;
 	}
 
-	rc = plpar_hcall(H_PKS_READ_OBJECT, retbuf, virt_to_phys(auth),
-			 virt_to_phys(label), label->size, virt_to_phys(output),
-			 maxobjsize);
+	if (consumer == PKS_OS_OWNER)
+		rc = plpar_hcall(H_PKS_READ_OBJECT, retbuf, virt_to_phys(auth),
+				 virt_to_phys(label), label->size, virt_to_phys(output),
+				 maxobjsize);
+	else
+		rc = plpar_hcall(H_PKS_READ_OBJECT, retbuf, virt_to_phys(auth),
+				 virt_to_phys(var->name), var->namelen, virt_to_phys(output),
+				 maxobjsize);
+
 
 	if (rc != H_SUCCESS) {
-		pr_err("Failed to read variable %s for component %s with error %d\n",
-		       var->name, var->component, rc);
 		rc = pseries_status_to_err(rc);
 		goto out_free_output;
 	}
diff --git a/arch/powerpc/platforms/pseries/plpks.h b/arch/powerpc/platforms/pseries/plpks.h
index c6a291367bb1..275ccd86bfb5 100644
--- a/arch/powerpc/platforms/pseries/plpks.h
+++ b/arch/powerpc/platforms/pseries/plpks.h
@@ -17,7 +17,7 @@
 #define WORLDREADABLE 0x08000000
 #define SIGNEDUPDATE 0x01000000
 
-#define PLPKS_VAR_LINUX	0x01
+#define PLPKS_VAR_LINUX	0x02
 #define PLPKS_VAR_COMMON	0x04
 
 struct plpks_var {