From 9f0fc191371843c4fc000a226b0a26b6c059aacd Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sat, 18 May 2024 19:40:19 +0200
Subject: Merging upstream version 6.7.7.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 arch/powerpc/kernel/btext.c              | 360 +------------------------------
 arch/powerpc/kernel/cpu_setup_6xx.S      |  20 +-
 arch/powerpc/kernel/cpu_specs_e500mc.h   |   3 +-
 arch/powerpc/kernel/crash_dump.c         |  12 ++
 arch/powerpc/kernel/eeh_driver.c         |   4 +-
 arch/powerpc/kernel/exceptions-64s.S     |   6 +-
 arch/powerpc/kernel/fadump.c             |   2 +-
 arch/powerpc/kernel/head_40x.S           |  19 +-
 arch/powerpc/kernel/head_44x.S           |  40 ++--
 arch/powerpc/kernel/head_85xx.S          |  12 +-
 arch/powerpc/kernel/head_book3s_32.S     |  63 +++---
 arch/powerpc/kernel/idle.c               |   1 -
 arch/powerpc/kernel/interrupt_64.S       |   4 +-
 arch/powerpc/kernel/io.c                 |  12 +-
 arch/powerpc/kernel/iommu.c              |  86 ++++----
 arch/powerpc/kernel/irq_64.c             |   2 +-
 arch/powerpc/kernel/paca.c               |   2 +-
 arch/powerpc/kernel/pci-common.c         |   3 +-
 arch/powerpc/kernel/prom_init.c          |   2 +-
 arch/powerpc/kernel/ptrace/ptrace.c      |   5 +-
 arch/powerpc/kernel/rtas-proc.c          |   2 +
 arch/powerpc/kernel/setup-common.c       |  17 --
 arch/powerpc/kernel/setup_64.c           |   2 +-
 arch/powerpc/kernel/signal.c             |   5 +-
 arch/powerpc/kernel/signal.h             |   7 +-
 arch/powerpc/kernel/smp.c                |   6 +-
 arch/powerpc/kernel/syscalls/syscall.tbl |   6 +-
 arch/powerpc/kernel/traps.c              |   6 +-
 28 files changed, 193 insertions(+), 516 deletions(-)

(limited to 'arch/powerpc/kernel')

diff --git a/arch/powerpc/kernel/btext.c b/arch/powerpc/kernel/btext.c
index 19e46fd623..7f63f1cdc6 100644
--- a/arch/powerpc/kernel/btext.c
+++ b/arch/powerpc/kernel/btext.c
@@ -8,6 +8,7 @@
 #include <linux/string.h>
 #include <linux/init.h>
 #include <linux/export.h>
+#include <linux/font.h>
 #include <linux/memblock.h>
 #include <linux/pgtable.h>
 #include <linux/of.h>
@@ -41,10 +42,6 @@ static unsigned char *logicalDisplayBase __force_data;
 
 unsigned long disp_BAT[2] __initdata = {0, 0};
 
-#define cmapsz	(16*256)
-
-static unsigned char vga_font[cmapsz];
-
 static int boot_text_mapped __force_data;
 
 extern void rmci_on(void);
@@ -407,7 +404,7 @@ static unsigned int expand_bits_16[4] = {
 };
 
 
-static void draw_byte_32(unsigned char *font, unsigned int *base, int rb)
+static void draw_byte_32(const unsigned char *font, unsigned int *base, int rb)
 {
 	int l, bits;
 	int fg = 0xFFFFFFFFUL;
@@ -428,7 +425,7 @@ static void draw_byte_32(unsigned char *font, unsigned int *base, int rb)
 	}
 }
 
-static inline void draw_byte_16(unsigned char *font, unsigned int *base, int rb)
+static inline void draw_byte_16(const unsigned char *font, unsigned int *base, int rb)
 {
 	int l, bits;
 	int fg = 0xFFFFFFFFUL;
@@ -446,7 +443,7 @@ static inline void draw_byte_16(unsigned char *font, unsigned int *base, int rb)
 	}
 }
 
-static inline void draw_byte_8(unsigned char *font, unsigned int *base, int rb)
+static inline void draw_byte_8(const unsigned char *font, unsigned int *base, int rb)
 {
 	int l, bits;
 	int fg = 0x0F0F0F0FUL;
@@ -465,7 +462,8 @@ static inline void draw_byte_8(unsigned char *font, unsigned int *base, int rb)
 static noinline void draw_byte(unsigned char c, long locX, long locY)
 {
 	unsigned char *base	= calc_base(locX << 3, locY << 4);
-	unsigned char *font	= &vga_font[((unsigned int)c) * 16];
+	unsigned int font_index = c * 16;
+	const unsigned char *font	= font_sun_8x16.data + font_index;
 	int rb			= dispDeviceRowBytes;
 
 	rmci_maybe_on();
@@ -583,349 +581,3 @@ void __init udbg_init_btext(void)
 	 */
 	udbg_putc = btext_drawchar;
 }
-
-static unsigned char vga_font[cmapsz] = {
-0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x7e, 0x81, 0xa5, 0x81, 0x81, 0xbd,
-0x99, 0x81, 0x81, 0x7e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x7e, 0xff,
-0xdb, 0xff, 0xff, 0xc3, 0xe7, 0xff, 0xff, 0x7e, 0x00, 0x00, 0x00, 0x00,
-0x00, 0x00, 0x00, 0x00, 0x6c, 0xfe, 0xfe, 0xfe, 0xfe, 0x7c, 0x38, 0x10,
-0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x38, 0x7c, 0xfe,
-0x7c, 0x38, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x18,
-0x3c, 0x3c, 0xe7, 0xe7, 0xe7, 0x18, 0x18, 0x3c, 0x00, 0x00, 0x00, 0x00,
-0x00, 0x00, 0x00, 0x18, 0x3c, 0x7e, 0xff, 0xff, 0x7e, 0x18, 0x18, 0x3c,
-0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x18, 0x3c,
-0x3c, 0x18, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff,
-0xff, 0xff, 0xe7, 0xc3, 0xc3, 0xe7, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
-0x00, 0x00, 0x00, 0x00, 0x00, 0x3c, 0x66, 0x42, 0x42, 0x66, 0x3c, 0x00,
-0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc3, 0x99, 0xbd,
-0xbd, 0x99, 0xc3, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x1e, 0x0e,
-0x1a, 0x32, 0x78, 0xcc, 0xcc, 0xcc, 0xcc, 0x78, 0x00, 0x00, 0x00, 0x00,
-0x00, 0x00, 0x3c, 0x66, 0x66, 0x66, 0x66, 0x3c, 0x18, 0x7e, 0x18, 0x18,
-0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x3f, 0x33, 0x3f, 0x30, 0x30, 0x30,
-0x30, 0x70, 0xf0, 0xe0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x7f, 0x63,
-0x7f, 0x63, 0x63, 0x63, 0x63, 0x67, 0xe7, 0xe6, 0xc0, 0x00, 0x00, 0x00,
-0x00, 0x00, 0x00, 0x18, 0x18, 0xdb, 0x3c, 0xe7, 0x3c, 0xdb, 0x18, 0x18,
-0x00, 0x00, 0x00, 0x00, 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfe, 0xf8,
-0xf0, 0xe0, 0xc0, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0x06, 0x0e,
-0x1e, 0x3e, 0xfe, 0x3e, 0x1e, 0x0e, 0x06, 0x02, 0x00, 0x00, 0x00, 0x00,
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-0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x18, 0x18, 0x18, 0x18,
-0x18, 0x1f, 0x18, 0x1f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-0x00, 0x00, 0x00, 0x00, 0x00, 0x1f, 0x18, 0x1f, 0x18, 0x18, 0x18, 0x18,
-0x18, 0x18, 0x18, 0x18, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x3f,
-0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36,
-0x36, 0x36, 0x36, 0xff, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36,
-0x18, 0x18, 0x18, 0x18, 0x18, 0xff, 0x18, 0xff, 0x18, 0x18, 0x18, 0x18,
-0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0xf8,
-0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-0x00, 0x00, 0x00, 0x1f, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18,
-0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
-0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff,
-0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf0, 0xf0, 0xf0, 0xf0,
-0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0,
-0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f,
-0x0f, 0x0f, 0x0f, 0x0f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00,
-0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-0x00, 0x76, 0xdc, 0xd8, 0xd8, 0xd8, 0xdc, 0x76, 0x00, 0x00, 0x00, 0x00,
-0x00, 0x00, 0x78, 0xcc, 0xcc, 0xcc, 0xd8, 0xcc, 0xc6, 0xc6, 0xc6, 0xcc,
-0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xfe, 0xc6, 0xc6, 0xc0, 0xc0, 0xc0,
-0xc0, 0xc0, 0xc0, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-0xfe, 0x6c, 0x6c, 0x6c, 0x6c, 0x6c, 0x6c, 0x6c, 0x00, 0x00, 0x00, 0x00,
-0x00, 0x00, 0x00, 0xfe, 0xc6, 0x60, 0x30, 0x18, 0x30, 0x60, 0xc6, 0xfe,
-0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x7e, 0xd8, 0xd8,
-0xd8, 0xd8, 0xd8, 0x70, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-0x66, 0x66, 0x66, 0x66, 0x66, 0x7c, 0x60, 0x60, 0xc0, 0x00, 0x00, 0x00,
-0x00, 0x00, 0x00, 0x00, 0x76, 0xdc, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18,
-0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x7e, 0x18, 0x3c, 0x66, 0x66,
-0x66, 0x3c, 0x18, 0x7e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x38,
-0x6c, 0xc6, 0xc6, 0xfe, 0xc6, 0xc6, 0x6c, 0x38, 0x00, 0x00, 0x00, 0x00,
-0x00, 0x00, 0x38, 0x6c, 0xc6, 0xc6, 0xc6, 0x6c, 0x6c, 0x6c, 0x6c, 0xee,
-0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x1e, 0x30, 0x18, 0x0c, 0x3e, 0x66,
-0x66, 0x66, 0x66, 0x3c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-0x00, 0x7e, 0xdb, 0xdb, 0xdb, 0x7e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-0x00, 0x00, 0x00, 0x03, 0x06, 0x7e, 0xdb, 0xdb, 0xf3, 0x7e, 0x60, 0xc0,
-0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x1c, 0x30, 0x60, 0x60, 0x7c, 0x60,
-0x60, 0x60, 0x30, 0x1c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x7c,
-0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0x00, 0x00, 0x00, 0x00,
-0x00, 0x00, 0x00, 0x00, 0xfe, 0x00, 0x00, 0xfe, 0x00, 0x00, 0xfe, 0x00,
-0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x18, 0x18, 0x7e, 0x18,
-0x18, 0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x30,
-0x18, 0x0c, 0x06, 0x0c, 0x18, 0x30, 0x00, 0x7e, 0x00, 0x00, 0x00, 0x00,
-0x00, 0x00, 0x00, 0x0c, 0x18, 0x30, 0x60, 0x30, 0x18, 0x0c, 0x00, 0x7e,
-0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0e, 0x1b, 0x1b, 0x1b, 0x18, 0x18,
-0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18,
-0x18, 0x18, 0x18, 0x18, 0xd8, 0xd8, 0xd8, 0x70, 0x00, 0x00, 0x00, 0x00,
-0x00, 0x00, 0x00, 0x00, 0x18, 0x18, 0x00, 0x7e, 0x00, 0x18, 0x18, 0x00,
-0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x76, 0xdc, 0x00,
-0x76, 0xdc, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x38, 0x6c, 0x6c,
-0x38, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x18, 0x18, 0x00, 0x00, 0x00,
-0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-0x18, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0f, 0x0c, 0x0c,
-0x0c, 0x0c, 0x0c, 0xec, 0x6c, 0x6c, 0x3c, 0x1c, 0x00, 0x00, 0x00, 0x00,
-0x00, 0xd8, 0x6c, 0x6c, 0x6c, 0x6c, 0x6c, 0x00, 0x00, 0x00, 0x00, 0x00,
-0x00, 0x00, 0x00, 0x00, 0x00, 0x70, 0xd8, 0x30, 0x60, 0xc8, 0xf8, 0x00,
-0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-0x7c, 0x7c, 0x7c, 0x7c, 0x7c, 0x7c, 0x7c, 0x00, 0x00, 0x00, 0x00, 0x00,
-0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-0x00, 0x00, 0x00, 0x00,
-};
-
diff --git a/arch/powerpc/kernel/cpu_setup_6xx.S b/arch/powerpc/kernel/cpu_setup_6xx.S
index f29ce3dd61..bfd3f442e5 100644
--- a/arch/powerpc/kernel/cpu_setup_6xx.S
+++ b/arch/powerpc/kernel/cpu_setup_6xx.S
@@ -26,6 +26,15 @@ BEGIN_FTR_SECTION
 	bl	__init_fpu_registers
 END_FTR_SECTION_IFCLR(CPU_FTR_FPU_UNAVAILABLE)
 	bl	setup_common_caches
+
+	/*
+	 * This assumes that all cores using __setup_cpu_603 with
+	 * MMU_FTR_USE_HIGH_BATS are G2_LE compatible
+	 */
+BEGIN_MMU_FTR_SECTION
+	bl      setup_g2_le_hid2
+END_MMU_FTR_SECTION_IFSET(MMU_FTR_USE_HIGH_BATS)
+
 	mtlr	r5
 	blr
 _GLOBAL(__setup_cpu_604)
@@ -115,6 +124,16 @@ SYM_FUNC_START_LOCAL(setup_604_hid0)
 	blr
 SYM_FUNC_END(setup_604_hid0)
 
+/* Enable high BATs for G2_LE and derivatives like e300cX */
+SYM_FUNC_START_LOCAL(setup_g2_le_hid2)
+	mfspr	r11,SPRN_HID2_G2_LE
+	oris	r11,r11,HID2_G2_LE_HBE@h
+	mtspr	SPRN_HID2_G2_LE,r11
+	sync
+	isync
+	blr
+SYM_FUNC_END(setup_g2_le_hid2)
+
 /* 7400 <= rev 2.7 and 7410 rev = 1.0 suffer from some
  * erratas we work around here.
  * Moto MPC710CE.pdf describes them, those are errata
@@ -495,4 +514,3 @@ _GLOBAL(__restore_cpu_setup)
 	mtcr	r7
 	blr
 _ASM_NOKPROBE_SYMBOL(__restore_cpu_setup)
-
diff --git a/arch/powerpc/kernel/cpu_specs_e500mc.h b/arch/powerpc/kernel/cpu_specs_e500mc.h
index ceb06b109f..2ae8e9a7b4 100644
--- a/arch/powerpc/kernel/cpu_specs_e500mc.h
+++ b/arch/powerpc/kernel/cpu_specs_e500mc.h
@@ -8,7 +8,8 @@
 
 #ifdef CONFIG_PPC64
 #define COMMON_USER_BOOKE	(PPC_FEATURE_32 | PPC_FEATURE_HAS_MMU | \
-				 PPC_FEATURE_HAS_FPU | PPC_FEATURE_64)
+				 PPC_FEATURE_HAS_FPU | PPC_FEATURE_64 | \
+				 PPC_FEATURE_BOOKE)
 #else
 #define COMMON_USER_BOOKE	(PPC_FEATURE_32 | PPC_FEATURE_HAS_MMU | \
 				 PPC_FEATURE_BOOKE)
diff --git a/arch/powerpc/kernel/crash_dump.c b/arch/powerpc/kernel/crash_dump.c
index 9a3b85bfc8..2086fa6cdc 100644
--- a/arch/powerpc/kernel/crash_dump.c
+++ b/arch/powerpc/kernel/crash_dump.c
@@ -19,6 +19,7 @@
 #include <linux/uio.h>
 #include <asm/rtas.h>
 #include <asm/inst.h>
+#include <asm/fadump.h>
 
 #ifdef DEBUG
 #include <asm/udbg.h>
@@ -92,6 +93,17 @@ ssize_t copy_oldmem_page(struct iov_iter *iter, unsigned long pfn,
 	return csize;
 }
 
+/*
+ * Return true only when kexec based kernel dump capturing method is used.
+ * This ensures all restritions applied for kdump case are not automatically
+ * applied for fadump case.
+ */
+bool is_kdump_kernel(void)
+{
+	return !is_fadump_active() && elfcorehdr_addr != ELFCORE_ADDR_MAX;
+}
+EXPORT_SYMBOL_GPL(is_kdump_kernel);
+
 #ifdef CONFIG_PPC_RTAS
 /*
  * The crashkernel region will almost always overlap the RTAS region, so
diff --git a/arch/powerpc/kernel/eeh_driver.c b/arch/powerpc/kernel/eeh_driver.c
index 438568a472..48773d2d9b 100644
--- a/arch/powerpc/kernel/eeh_driver.c
+++ b/arch/powerpc/kernel/eeh_driver.c
@@ -39,7 +39,7 @@ static int eeh_result_priority(enum pci_ers_result result)
 	case PCI_ERS_RESULT_NEED_RESET:
 		return 6;
 	default:
-		WARN_ONCE(1, "Unknown pci_ers_result value: %d\n", (int)result);
+		WARN_ONCE(1, "Unknown pci_ers_result value: %d\n", result);
 		return 0;
 	}
 };
@@ -60,7 +60,7 @@ static const char *pci_ers_result_name(enum pci_ers_result result)
 	case PCI_ERS_RESULT_NO_AER_DRIVER:
 		return "no AER driver";
 	default:
-		WARN_ONCE(1, "Unknown result type: %d\n", (int)result);
+		WARN_ONCE(1, "Unknown result type: %d\n", result);
 		return "unknown";
 	}
 };
diff --git a/arch/powerpc/kernel/exceptions-64s.S b/arch/powerpc/kernel/exceptions-64s.S
index c33c8ebf86..eaf2f167c3 100644
--- a/arch/powerpc/kernel/exceptions-64s.S
+++ b/arch/powerpc/kernel/exceptions-64s.S
@@ -893,7 +893,7 @@ __start_interrupts:
  *
  * Call convention:
  *
- * syscall register convention is in Documentation/powerpc/syscall64-abi.rst
+ * syscall register convention is in Documentation/arch/powerpc/syscall64-abi.rst
  */
 EXC_VIRT_BEGIN(system_call_vectored, 0x3000, 0x1000)
 	/* SCV 0 */
@@ -1952,8 +1952,8 @@ EXC_VIRT_NONE(0x4b00, 0x100)
  * Call convention:
  *
  * syscall and hypercalls register conventions are documented in
- * Documentation/powerpc/syscall64-abi.rst and
- * Documentation/powerpc/papr_hcalls.rst respectively.
+ * Documentation/arch/powerpc/syscall64-abi.rst and
+ * Documentation/arch/powerpc/papr_hcalls.rst respectively.
  *
  * The intersection of volatile registers that don't contain possible
  * inputs is: cr0, xer, ctr. We may use these as scratch regs upon entry
diff --git a/arch/powerpc/kernel/fadump.c b/arch/powerpc/kernel/fadump.c
index 3ff2da7b12..d14eda1e85 100644
--- a/arch/powerpc/kernel/fadump.c
+++ b/arch/powerpc/kernel/fadump.c
@@ -313,7 +313,7 @@ static __init u64 fadump_calculate_reserve_size(void)
 	 * memory at a predefined offset.
 	 */
 	ret = parse_crashkernel(boot_command_line, memblock_phys_mem_size(),
-				&size, &base);
+				&size, &base, NULL, NULL);
 	if (ret == 0 && size > 0) {
 		unsigned long max_size;
 
diff --git a/arch/powerpc/kernel/head_40x.S b/arch/powerpc/kernel/head_40x.S
index b32e7b2ebd..9fc90410b3 100644
--- a/arch/powerpc/kernel/head_40x.S
+++ b/arch/powerpc/kernel/head_40x.S
@@ -312,13 +312,13 @@ _ASM_NOKPROBE_SYMBOL(\name\()_virt)
 
 	rlwimi	r11, r10, 22, 20, 29	/* Compute PTE address */
 	lwz	r11, 0(r11)		/* Get Linux PTE */
-	li	r9, _PAGE_PRESENT | _PAGE_ACCESSED
+	li	r9, _PAGE_PRESENT | _PAGE_ACCESSED | _PAGE_READ
 	andc.	r9, r9, r11		/* Check permission */
 	bne	5f
 
-	rlwinm	r9, r11, 1, _PAGE_RW	/* dirty => rw */
-	and	r9, r9, r11		/* hwwrite = dirty & rw */
-	rlwimi	r11, r9, 0, _PAGE_RW	/* replace rw by hwwrite */
+	rlwinm	r9, r11, 1, _PAGE_WRITE	/* dirty => w */
+	and	r9, r9, r11		/* hwwrite = dirty & w */
+	rlwimi	r11, r9, 0, _PAGE_WRITE	/* replace w by hwwrite */
 
 	/* Create TLB tag.  This is the faulting address plus a static
 	 * set of bits.  These are size, valid, E, U0.
@@ -400,9 +400,9 @@ _ASM_NOKPROBE_SYMBOL(\name\()_virt)
 	andc.	r9, r9, r11		/* Check permission */
 	bne	5f
 
-	rlwinm	r9, r11, 1, _PAGE_RW	/* dirty => rw */
-	and	r9, r9, r11		/* hwwrite = dirty & rw */
-	rlwimi	r11, r9, 0, _PAGE_RW	/* replace rw by hwwrite */
+	rlwinm	r9, r11, 1, _PAGE_WRITE	/* dirty => w */
+	and	r9, r9, r11		/* hwwrite = dirty & w */
+	rlwimi	r11, r9, 0, _PAGE_WRITE	/* replace w by hwwrite */
 
 	/* Create TLB tag.  This is the faulting address plus a static
 	 * set of bits.  These are size, valid, E, U0.
@@ -561,10 +561,11 @@ finish_tlb_load:
 	/*
 	 * Clear out the software-only bits in the PTE to generate the
 	 * TLB_DATA value.  These are the bottom 2 bits of the RPM, the
-	 * top 3 bits of the zone field, and M.
+	 * 4 bits of the zone field, and M.
 	 */
-	li	r9, 0x0ce2
+	li	r9, 0x0cf2
 	andc	r11, r11, r9
+	rlwimi	r11, r10, 8, 24, 27	/* Copy 4 upper address bit into zone */
 
 	/* load the next available TLB index. */
 	lwz	r9, tlb_4xx_index@l(0)
diff --git a/arch/powerpc/kernel/head_44x.S b/arch/powerpc/kernel/head_44x.S
index a3197c9f72..25642e802e 100644
--- a/arch/powerpc/kernel/head_44x.S
+++ b/arch/powerpc/kernel/head_44x.S
@@ -314,8 +314,8 @@ interrupt_base:
 	 * kernel page tables.
 	 */
 	lis	r11, PAGE_OFFSET@h
-	cmplw	r10, r11
-	blt+	3f
+	cmplw	cr7, r10, r11
+	blt+	cr7, 3f
 	lis	r11, swapper_pg_dir@h
 	ori	r11, r11, swapper_pg_dir@l
 
@@ -342,7 +342,7 @@ interrupt_base:
 	mtspr	SPRN_MMUCR,r12
 
 	/* Mask of required permission bits. Note that while we
-	 * do copy ESR:ST to _PAGE_RW position as trying to write
+	 * do copy ESR:ST to _PAGE_WRITE position as trying to write
 	 * to an RO page is pretty common, we don't do it with
 	 * _PAGE_DIRTY. We could do it, but it's a fairly rare
 	 * event so I'd rather take the overhead when it happens
@@ -355,7 +355,7 @@ interrupt_base:
 	 *       place or can we save a couple of instructions here ?
 	 */
 	mfspr	r12,SPRN_ESR
-	li	r13,_PAGE_PRESENT|_PAGE_ACCESSED
+	li	r13,_PAGE_PRESENT|_PAGE_ACCESSED|_PAGE_READ
 	rlwimi	r13,r12,10,30,30
 
 	/* Load the PTE */
@@ -428,8 +428,8 @@ interrupt_base:
 	 * kernel page tables.
 	 */
 	lis	r11, PAGE_OFFSET@h
-	cmplw	r10, r11
-	blt+	3f
+	cmplw	cr7, r10, r11
+	blt+	cr7, 3f
 	lis	r11, swapper_pg_dir@h
 	ori	r11, r11, swapper_pg_dir@l
 
@@ -515,6 +515,7 @@ interrupt_base:
  * 	r11 - PTE high word value
  *	r12 - PTE low word value
  *	r13 - TLB index
+ *	cr7 - Result of comparison with PAGE_OFFSET
  *	MMUCR - loaded with proper value when we get here
  *	Upon exit, we reload everything and RFI.
  */
@@ -533,11 +534,10 @@ finish_tlb_load_44x:
 	tlbwe	r10,r13,PPC44x_TLB_PAGEID	/* Write PAGEID */
 
 	/* And WS 2 */
-	li	r10,0xf85			/* Mask to apply from PTE */
-	rlwimi	r10,r12,29,30,30		/* DIRTY -> SW position */
+	li	r10,0xf84			/* Mask to apply from PTE */
+	rlwimi	r10,r12,29,30,31		/* DIRTY,READ -> SW,SR position */
 	and	r11,r12,r10			/* Mask PTE bits to keep */
-	andi.	r10,r12,_PAGE_USER		/* User page ? */
-	beq	1f				/* nope, leave U bits empty */
+	bge	cr7,1f			/* User page ? no, leave U bits empty */
 	rlwimi	r11,r11,3,26,28			/* yes, copy S bits to U */
 	rlwinm	r11,r11,0,~PPC44x_TLB_SX	/* Clear SX if User page */
 1:	tlbwe	r11,r13,PPC44x_TLB_ATTRIB	/* Write ATTRIB */
@@ -568,8 +568,8 @@ finish_tlb_load_44x:
 	 * kernel page tables.
 	 */
 	lis	r11,PAGE_OFFSET@h
-	cmplw	cr0,r10,r11
-	blt+	3f
+	cmplw	cr7,r10,r11
+	blt+	cr7,3f
 	lis	r11,swapper_pg_dir@h
 	ori	r11,r11, swapper_pg_dir@l
 	li	r12,0			/* MMUCR = 0 */
@@ -586,7 +586,7 @@ finish_tlb_load_44x:
 4:	mtspr	SPRN_MMUCR,r12		/* Set MMUCR */
 
 	/* Mask of required permission bits. Note that while we
-	 * do copy ESR:ST to _PAGE_RW position as trying to write
+	 * do copy ESR:ST to _PAGE_WRITE position as trying to write
 	 * to an RO page is pretty common, we don't do it with
 	 * _PAGE_DIRTY. We could do it, but it's a fairly rare
 	 * event so I'd rather take the overhead when it happens
@@ -599,7 +599,7 @@ finish_tlb_load_44x:
 	 *       place or can we save a couple of instructions here ?
 	 */
 	mfspr	r12,SPRN_ESR
-	li	r13,_PAGE_PRESENT|_PAGE_ACCESSED
+	li	r13,_PAGE_PRESENT|_PAGE_ACCESSED|_PAGE_READ
 	rlwimi	r13,r12,10,30,30
 
 	/* Load the PTE */
@@ -669,8 +669,8 @@ finish_tlb_load_44x:
 	 * kernel page tables.
 	 */
 	lis	r11,PAGE_OFFSET@h
-	cmplw	cr0,r10,r11
-	blt+	3f
+	cmplw	cr7,r10,r11
+	blt+	cr7,3f
 	lis	r11,swapper_pg_dir@h
 	ori	r11,r11, swapper_pg_dir@l
 	li	r12,0			/* MMUCR = 0 */
@@ -744,6 +744,7 @@ finish_tlb_load_44x:
  * 	r11 - PTE high word value
  *	r12 - PTE low word value
  *      r13 - free to use
+ *	cr7 - Result of comparison with PAGE_OFFSET
  *	MMUCR - loaded with proper value when we get here
  *	Upon exit, we reload everything and RFI.
  */
@@ -753,11 +754,10 @@ finish_tlb_load_47x:
 	tlbwe	r11,r13,1
 
 	/* And make up word 2 */
-	li	r10,0xf85			/* Mask to apply from PTE */
-	rlwimi	r10,r12,29,30,30		/* DIRTY -> SW position */
+	li	r10,0xf84			/* Mask to apply from PTE */
+	rlwimi	r10,r12,29,30,31		/* DIRTY,READ -> SW,SR position */
 	and	r11,r12,r10			/* Mask PTE bits to keep */
-	andi.	r10,r12,_PAGE_USER		/* User page ? */
-	beq	1f				/* nope, leave U bits empty */
+	bge	cr7,1f			/* User page ? no, leave U bits empty */
 	rlwimi	r11,r11,3,26,28			/* yes, copy S bits to U */
 	rlwinm	r11,r11,0,~PPC47x_TLB2_SX	/* Clear SX if User page */
 1:	tlbwe	r11,r13,2
diff --git a/arch/powerpc/kernel/head_85xx.S b/arch/powerpc/kernel/head_85xx.S
index 0f1641a312..39724ff5ae 100644
--- a/arch/powerpc/kernel/head_85xx.S
+++ b/arch/powerpc/kernel/head_85xx.S
@@ -471,7 +471,7 @@ END_BTB_FLUSH_SECTION
 
 4:
 	/* Mask of required permission bits. Note that while we
-	 * do copy ESR:ST to _PAGE_RW position as trying to write
+	 * do copy ESR:ST to _PAGE_WRITE position as trying to write
 	 * to an RO page is pretty common, we don't do it with
 	 * _PAGE_DIRTY. We could do it, but it's a fairly rare
 	 * event so I'd rather take the overhead when it happens
@@ -485,10 +485,10 @@ END_BTB_FLUSH_SECTION
 	 */
 	mfspr	r12,SPRN_ESR
 #ifdef CONFIG_PTE_64BIT
-	li	r13,_PAGE_PRESENT
+	li	r13,_PAGE_PRESENT|_PAGE_BAP_SR
 	oris	r13,r13,_PAGE_ACCESSED@h
 #else
-	li	r13,_PAGE_PRESENT|_PAGE_ACCESSED
+	li	r13,_PAGE_PRESENT|_PAGE_READ|_PAGE_ACCESSED
 #endif
 	rlwimi	r13,r12,11,29,29
 
@@ -783,15 +783,15 @@ BEGIN_MMU_FTR_SECTION
 	mtspr	SPRN_MAS7, r10
 END_MMU_FTR_SECTION_IFSET(MMU_FTR_BIG_PHYS)
 #else
-	li	r10, (_PAGE_EXEC | _PAGE_PRESENT)
+	li	r10, (_PAGE_EXEC | _PAGE_READ)
 	mr	r13, r11
 	rlwimi	r10, r11, 31, 29, 29	/* extract _PAGE_DIRTY into SW */
 	and	r12, r11, r10
-	andi.	r10, r11, _PAGE_USER	/* Test for _PAGE_USER */
+	mcrf	cr0, cr5		/* Test for user page */
 	slwi	r10, r12, 1
 	or	r10, r10, r12
 	rlwinm	r10, r10, 0, ~_PAGE_EXEC	/* Clear SX on user pages */
-	iseleq	r12, r12, r10
+	isellt	r12, r10, r12
 	rlwimi	r13, r12, 0, 20, 31	/* Get RPN from PTE, merge w/ perms */
 	mtspr	SPRN_MAS3, r13
 #endif
diff --git a/arch/powerpc/kernel/head_book3s_32.S b/arch/powerpc/kernel/head_book3s_32.S
index 6764b98ca3..c1d89764dd 100644
--- a/arch/powerpc/kernel/head_book3s_32.S
+++ b/arch/powerpc/kernel/head_book3s_32.S
@@ -412,10 +412,10 @@ END_FTR_SECTION_IFSET(CPU_FTR_FPU_UNAVAILABLE)
 	. = INTERRUPT_INST_TLB_MISS_603
 InstructionTLBMiss:
 /*
- * r0:	scratch
+ * r0:	userspace flag (later scratch)
  * r1:	linux style pte ( later becomes ppc hardware pte )
  * r2:	ptr to linux-style pte
- * r3:	scratch
+ * r3:	fault address
  */
 	/* Get PTE (linux-style) and check access */
 	mfspr	r3,SPRN_IMISS
@@ -424,12 +424,13 @@ InstructionTLBMiss:
 	cmplw	0,r1,r3
 #endif
 	mfspr	r2, SPRN_SDR1
-	li	r1,_PAGE_PRESENT | _PAGE_ACCESSED | _PAGE_EXEC | _PAGE_USER
+	li	r1,_PAGE_PRESENT | _PAGE_ACCESSED | _PAGE_EXEC
 	rlwinm	r2, r2, 28, 0xfffff000
 #ifdef CONFIG_MODULES
+	li	r0, 3
 	bgt-	112f
 	lis	r2, (swapper_pg_dir - PAGE_OFFSET)@ha	/* if kernel address, use */
-	li	r1,_PAGE_PRESENT | _PAGE_ACCESSED | _PAGE_EXEC
+	li	r0, 0
 	addi	r2, r2, (swapper_pg_dir - PAGE_OFFSET)@l	/* kernel page table */
 #endif
 112:	rlwimi	r2,r3,12,20,29		/* insert top 10 bits of address */
@@ -437,13 +438,15 @@ InstructionTLBMiss:
 	rlwinm.	r2,r2,0,0,19		/* extract address of pte page */
 	beq-	InstructionAddressInvalid	/* return if no mapping */
 	rlwimi	r2,r3,22,20,29		/* insert next 10 bits of address */
-	lwz	r0,0(r2)		/* get linux-style pte */
-	andc.	r1,r1,r0		/* check access & ~permission */
+	lwz	r2,0(r2)		/* get linux-style pte */
+	andc.	r1,r1,r2		/* check access & ~permission */
 	bne-	InstructionAddressInvalid /* return if access not permitted */
 	/* Convert linux-style PTE to low word of PPC-style PTE */
-	rlwimi	r0,r0,32-2,31,31	/* _PAGE_USER -> PP lsb */
+#ifdef CONFIG_MODULES
+	rlwimi	r2, r0, 0, 31, 31	/* userspace ? -> PP lsb */
+#endif
 	ori	r1, r1, 0xe06		/* clear out reserved bits */
-	andc	r1, r0, r1		/* PP = user? 1 : 0 */
+	andc	r1, r2, r1		/* PP = user? 1 : 0 */
 BEGIN_FTR_SECTION
 	rlwinm	r1,r1,0,~_PAGE_COHERENT	/* clear M (coherence not required) */
 END_FTR_SECTION_IFCLR(CPU_FTR_NEED_COHERENT)
@@ -478,38 +481,38 @@ InstructionAddressInvalid:
 	. = INTERRUPT_DATA_LOAD_TLB_MISS_603
 DataLoadTLBMiss:
 /*
- * r0:	scratch
+ * r0:	userspace flag (later scratch)
  * r1:	linux style pte ( later becomes ppc hardware pte )
  * r2:	ptr to linux-style pte
- * r3:	scratch
+ * r3:	fault address
  */
 	/* Get PTE (linux-style) and check access */
 	mfspr	r3,SPRN_DMISS
 	lis	r1, TASK_SIZE@h		/* check if kernel address */
 	cmplw	0,r1,r3
 	mfspr	r2, SPRN_SDR1
-	li	r1, _PAGE_PRESENT | _PAGE_ACCESSED | _PAGE_USER
+	li	r1, _PAGE_PRESENT | _PAGE_ACCESSED | _PAGE_READ
 	rlwinm	r2, r2, 28, 0xfffff000
+	li	r0, 3
 	bgt-	112f
 	lis	r2, (swapper_pg_dir - PAGE_OFFSET)@ha	/* if kernel address, use */
-	li	r1, _PAGE_PRESENT | _PAGE_ACCESSED
+	li	r0, 0
 	addi	r2, r2, (swapper_pg_dir - PAGE_OFFSET)@l	/* kernel page table */
 112:	rlwimi	r2,r3,12,20,29		/* insert top 10 bits of address */
 	lwz	r2,0(r2)		/* get pmd entry */
 	rlwinm.	r2,r2,0,0,19		/* extract address of pte page */
 	beq-	DataAddressInvalid	/* return if no mapping */
 	rlwimi	r2,r3,22,20,29		/* insert next 10 bits of address */
-	lwz	r0,0(r2)		/* get linux-style pte */
-	andc.	r1,r1,r0		/* check access & ~permission */
+	lwz	r2,0(r2)		/* get linux-style pte */
+	andc.	r1,r1,r2		/* check access & ~permission */
 	bne-	DataAddressInvalid	/* return if access not permitted */
 	/* Convert linux-style PTE to low word of PPC-style PTE */
-	rlwinm	r1,r0,32-9,30,30	/* _PAGE_RW -> PP msb */
-	rlwimi	r0,r0,32-1,30,30	/* _PAGE_USER -> PP msb */
-	rlwimi	r1,r0,32-3,24,24	/* _PAGE_RW -> _PAGE_DIRTY */
-	rlwimi	r0,r0,32-1,31,31	/* _PAGE_USER -> PP lsb */
+	rlwinm	r1,r2,32-9,30,30	/* _PAGE_WRITE -> PP msb */
+	rlwimi	r2,r0,0,30,31		/* userspace ? -> PP */
+	rlwimi	r1,r2,32-3,24,24	/* _PAGE_WRITE -> _PAGE_DIRTY */
 	xori	r1,r1,_PAGE_DIRTY	/* clear dirty when not rw */
 	ori	r1,r1,0xe04		/* clear out reserved bits */
-	andc	r1,r0,r1		/* PP = user? rw? 1: 3: 0 */
+	andc	r1,r2,r1		/* PP = user? rw? 1: 3: 0 */
 BEGIN_FTR_SECTION
 	rlwinm	r1,r1,0,~_PAGE_COHERENT	/* clear M (coherence not required) */
 END_FTR_SECTION_IFCLR(CPU_FTR_NEED_COHERENT)
@@ -558,34 +561,35 @@ DataAddressInvalid:
 	. = INTERRUPT_DATA_STORE_TLB_MISS_603
 DataStoreTLBMiss:
 /*
- * r0:	scratch
+ * r0:	userspace flag (later scratch)
  * r1:	linux style pte ( later becomes ppc hardware pte )
  * r2:	ptr to linux-style pte
- * r3:	scratch
+ * r3:	fault address
  */
 	/* Get PTE (linux-style) and check access */
 	mfspr	r3,SPRN_DMISS
 	lis	r1, TASK_SIZE@h		/* check if kernel address */
 	cmplw	0,r1,r3
 	mfspr	r2, SPRN_SDR1
-	li	r1, _PAGE_RW | _PAGE_DIRTY | _PAGE_PRESENT | _PAGE_ACCESSED | _PAGE_USER
+	li	r1, _PAGE_RW | _PAGE_DIRTY | _PAGE_PRESENT | _PAGE_ACCESSED
 	rlwinm	r2, r2, 28, 0xfffff000
+	li	r0, 3
 	bgt-	112f
 	lis	r2, (swapper_pg_dir - PAGE_OFFSET)@ha	/* if kernel address, use */
-	li	r1, _PAGE_RW | _PAGE_DIRTY | _PAGE_PRESENT | _PAGE_ACCESSED
+	li	r0, 0
 	addi	r2, r2, (swapper_pg_dir - PAGE_OFFSET)@l	/* kernel page table */
 112:	rlwimi	r2,r3,12,20,29		/* insert top 10 bits of address */
 	lwz	r2,0(r2)		/* get pmd entry */
 	rlwinm.	r2,r2,0,0,19		/* extract address of pte page */
 	beq-	DataAddressInvalid	/* return if no mapping */
 	rlwimi	r2,r3,22,20,29		/* insert next 10 bits of address */
-	lwz	r0,0(r2)		/* get linux-style pte */
-	andc.	r1,r1,r0		/* check access & ~permission */
+	lwz	r2,0(r2)		/* get linux-style pte */
+	andc.	r1,r1,r2		/* check access & ~permission */
 	bne-	DataAddressInvalid	/* return if access not permitted */
 	/* Convert linux-style PTE to low word of PPC-style PTE */
-	rlwimi	r0,r0,32-2,31,31	/* _PAGE_USER -> PP lsb */
+	rlwimi	r2,r0,0,31,31		/* userspace ? -> PP lsb */
 	li	r1,0xe06		/* clear out reserved bits & PP msb */
-	andc	r1,r0,r1		/* PP = user? 1: 0 */
+	andc	r1,r2,r1		/* PP = user? 1: 0 */
 BEGIN_FTR_SECTION
 	rlwinm	r1,r1,0,~_PAGE_COHERENT	/* clear M (coherence not required) */
 END_FTR_SECTION_IFCLR(CPU_FTR_NEED_COHERENT)
@@ -689,7 +693,8 @@ hash_page_dsi:
 	mfdar	r4
 	mfsrr0	r5
 	mfsrr1	r9
-	rlwinm	r3, r3, 32 - 15, _PAGE_RW	/* DSISR_STORE -> _PAGE_RW */
+	rlwinm	r3, r3, 32 - 15, _PAGE_WRITE	/* DSISR_STORE -> _PAGE_WRITE */
+	ori	r3, r3, _PAGE_PRESENT | _PAGE_READ
 	bl	hash_page
 	mfspr	r10, SPRN_SPRG_THREAD
 	restore_regs_thread r10
@@ -699,7 +704,7 @@ hash_page_isi:
 	mr	r11, r10
 	mfspr	r10, SPRN_SPRG_THREAD
 	save_regs_thread	r10
-	li	r3, 0
+	li	r3, _PAGE_PRESENT | _PAGE_EXEC
 	lwz	r4, SRR0(r10)
 	lwz	r9, SRR1(r10)
 	bl	hash_page
diff --git a/arch/powerpc/kernel/idle.c b/arch/powerpc/kernel/idle.c
index b1c0418b25..30b56c67fa 100644
--- a/arch/powerpc/kernel/idle.c
+++ b/arch/powerpc/kernel/idle.c
@@ -105,7 +105,6 @@ static struct ctl_table powersave_nap_ctl_table[] = {
 		.mode		= 0644,
 		.proc_handler	= proc_dointvec,
 	},
-	{}
 };
 
 static int __init
diff --git a/arch/powerpc/kernel/interrupt_64.S b/arch/powerpc/kernel/interrupt_64.S
index bd863702d8..1ad059a9e2 100644
--- a/arch/powerpc/kernel/interrupt_64.S
+++ b/arch/powerpc/kernel/interrupt_64.S
@@ -52,7 +52,8 @@ _ASM_NOKPROBE_SYMBOL(system_call_vectored_\name)
 	mr	r10,r1
 	ld	r1,PACAKSAVE(r13)
 	std	r10,0(r1)
-	std	r11,_NIP(r1)
+	std	r11,_LINK(r1)
+	std	r11,_NIP(r1)	/* Saved LR is also the next instruction */
 	std	r12,_MSR(r1)
 	std	r0,GPR0(r1)
 	std	r10,GPR1(r1)
@@ -70,7 +71,6 @@ _ASM_NOKPROBE_SYMBOL(system_call_vectored_\name)
 	std	r9,GPR13(r1)
 	SAVE_NVGPRS(r1)
 	std	r11,_XER(r1)
-	std	r11,_LINK(r1)
 	std	r11,_CTR(r1)
 
 	li	r11,\trapnr
diff --git a/arch/powerpc/kernel/io.c b/arch/powerpc/kernel/io.c
index 2f29b7d432..6af5359059 100644
--- a/arch/powerpc/kernel/io.c
+++ b/arch/powerpc/kernel/io.c
@@ -33,7 +33,7 @@ void _insb(const volatile u8 __iomem *port, void *buf, long count)
 		return;
 	asm volatile("sync");
 	do {
-		tmp = *port;
+		tmp = *(const volatile u8 __force *)port;
 		eieio();
 		*tbuf++ = tmp;
 	} while (--count != 0);
@@ -49,7 +49,7 @@ void _outsb(volatile u8 __iomem *port, const void *buf, long count)
 		return;
 	asm volatile("sync");
 	do {
-		*port = *tbuf++;
+		*(volatile u8 __force *)port = *tbuf++;
 	} while (--count != 0);
 	asm volatile("sync");
 }
@@ -64,7 +64,7 @@ void _insw_ns(const volatile u16 __iomem *port, void *buf, long count)
 		return;
 	asm volatile("sync");
 	do {
-		tmp = *port;
+		tmp = *(const volatile u16 __force *)port;
 		eieio();
 		*tbuf++ = tmp;
 	} while (--count != 0);
@@ -80,7 +80,7 @@ void _outsw_ns(volatile u16 __iomem *port, const void *buf, long count)
 		return;
 	asm volatile("sync");
 	do {
-		*port = *tbuf++;
+		*(volatile u16 __force *)port = *tbuf++;
 	} while (--count != 0);
 	asm volatile("sync");
 }
@@ -95,7 +95,7 @@ void _insl_ns(const volatile u32 __iomem *port, void *buf, long count)
 		return;
 	asm volatile("sync");
 	do {
-		tmp = *port;
+		tmp = *(const volatile u32 __force *)port;
 		eieio();
 		*tbuf++ = tmp;
 	} while (--count != 0);
@@ -111,7 +111,7 @@ void _outsl_ns(volatile u32 __iomem *port, const void *buf, long count)
 		return;
 	asm volatile("sync");
 	do {
-		*port = *tbuf++;
+		*(volatile u32 __force *)port = *tbuf++;
 	} while (--count != 0);
 	asm volatile("sync");
 }
diff --git a/arch/powerpc/kernel/iommu.c b/arch/powerpc/kernel/iommu.c
index 14251bc521..2c0173e709 100644
--- a/arch/powerpc/kernel/iommu.c
+++ b/arch/powerpc/kernel/iommu.c
@@ -1074,10 +1074,10 @@ int iommu_tce_check_gpa(unsigned long page_shift, unsigned long gpa)
 }
 EXPORT_SYMBOL_GPL(iommu_tce_check_gpa);
 
-extern long iommu_tce_xchg_no_kill(struct mm_struct *mm,
-		struct iommu_table *tbl,
-		unsigned long entry, unsigned long *hpa,
-		enum dma_data_direction *direction)
+long iommu_tce_xchg_no_kill(struct mm_struct *mm,
+			    struct iommu_table *tbl,
+			    unsigned long entry, unsigned long *hpa,
+			    enum dma_data_direction *direction)
 {
 	long ret;
 	unsigned long size = 0;
@@ -1280,13 +1280,21 @@ struct iommu_table_group_ops spapr_tce_table_group_ops = {
 /*
  * A simple iommu_ops to allow less cruft in generic VFIO code.
  */
-static int spapr_tce_blocking_iommu_attach_dev(struct iommu_domain *dom,
-					       struct device *dev)
+static int
+spapr_tce_platform_iommu_attach_dev(struct iommu_domain *platform_domain,
+				    struct device *dev)
 {
+	struct iommu_domain *domain = iommu_get_domain_for_dev(dev);
 	struct iommu_group *grp = iommu_group_get(dev);
 	struct iommu_table_group *table_group;
 	int ret = -EINVAL;
 
+	/* At first attach the ownership is already set */
+	if (!domain) {
+		iommu_group_put(grp);
+		return 0;
+	}
+
 	if (!grp)
 		return -ENODEV;
 
@@ -1297,17 +1305,22 @@ static int spapr_tce_blocking_iommu_attach_dev(struct iommu_domain *dom,
 	return ret;
 }
 
-static void spapr_tce_blocking_iommu_set_platform_dma(struct device *dev)
-{
-	struct iommu_group *grp = iommu_group_get(dev);
-	struct iommu_table_group *table_group;
+static const struct iommu_domain_ops spapr_tce_platform_domain_ops = {
+	.attach_dev = spapr_tce_platform_iommu_attach_dev,
+};
 
-	table_group = iommu_group_get_iommudata(grp);
-	table_group->ops->release_ownership(table_group);
-}
+static struct iommu_domain spapr_tce_platform_domain = {
+	.type = IOMMU_DOMAIN_PLATFORM,
+	.ops = &spapr_tce_platform_domain_ops,
+};
 
-static const struct iommu_domain_ops spapr_tce_blocking_domain_ops = {
-	.attach_dev = spapr_tce_blocking_iommu_attach_dev,
+static struct iommu_domain spapr_tce_blocked_domain = {
+	.type = IOMMU_DOMAIN_BLOCKED,
+	/*
+	 * FIXME: SPAPR mixes blocked and platform behaviors, the blocked domain
+	 * also sets the dma_api ops
+	 */
+	.ops = &spapr_tce_platform_domain_ops,
 };
 
 static bool spapr_tce_iommu_capable(struct device *dev, enum iommu_cap cap)
@@ -1322,29 +1335,13 @@ static bool spapr_tce_iommu_capable(struct device *dev, enum iommu_cap cap)
 	return false;
 }
 
-static struct iommu_domain *spapr_tce_iommu_domain_alloc(unsigned int type)
-{
-	struct iommu_domain *dom;
-
-	if (type != IOMMU_DOMAIN_BLOCKED)
-		return NULL;
-
-	dom = kzalloc(sizeof(*dom), GFP_KERNEL);
-	if (!dom)
-		return NULL;
-
-	dom->ops = &spapr_tce_blocking_domain_ops;
-
-	return dom;
-}
-
 static struct iommu_device *spapr_tce_iommu_probe_device(struct device *dev)
 {
 	struct pci_dev *pdev;
 	struct pci_controller *hose;
 
 	if (!dev_is_pci(dev))
-		return ERR_PTR(-EPERM);
+		return ERR_PTR(-ENODEV);
 
 	pdev = to_pci_dev(dev);
 	hose = pdev->bus->sysdata;
@@ -1371,12 +1368,12 @@ static struct iommu_group *spapr_tce_iommu_device_group(struct device *dev)
 }
 
 static const struct iommu_ops spapr_tce_iommu_ops = {
+	.default_domain = &spapr_tce_platform_domain,
+	.blocked_domain = &spapr_tce_blocked_domain,
 	.capable = spapr_tce_iommu_capable,
-	.domain_alloc = spapr_tce_iommu_domain_alloc,
 	.probe_device = spapr_tce_iommu_probe_device,
 	.release_device = spapr_tce_iommu_release_device,
 	.device_group = spapr_tce_iommu_device_group,
-	.set_platform_dma_ops = spapr_tce_blocking_iommu_set_platform_dma,
 };
 
 static struct attribute *spapr_tce_iommu_attrs[] = {
@@ -1393,6 +1390,21 @@ static const struct attribute_group *spapr_tce_iommu_groups[] = {
 	NULL,
 };
 
+void ppc_iommu_register_device(struct pci_controller *phb)
+{
+	iommu_device_sysfs_add(&phb->iommu, phb->parent,
+				spapr_tce_iommu_groups, "iommu-phb%04x",
+				phb->global_number);
+	iommu_device_register(&phb->iommu, &spapr_tce_iommu_ops,
+				phb->parent);
+}
+
+void ppc_iommu_unregister_device(struct pci_controller *phb)
+{
+	iommu_device_unregister(&phb->iommu);
+	iommu_device_sysfs_remove(&phb->iommu);
+}
+
 /*
  * This registers IOMMU devices of PHBs. This needs to happen
  * after core_initcall(iommu_init) + postcore_initcall(pci_driver_init) and
@@ -1403,11 +1415,7 @@ static int __init spapr_tce_setup_phb_iommus_initcall(void)
 	struct pci_controller *hose;
 
 	list_for_each_entry(hose, &hose_list, list_node) {
-		iommu_device_sysfs_add(&hose->iommu, hose->parent,
-				       spapr_tce_iommu_groups, "iommu-phb%04x",
-				       hose->global_number);
-		iommu_device_register(&hose->iommu, &spapr_tce_iommu_ops,
-				      hose->parent);
+		ppc_iommu_register_device(hose);
 	}
 	return 0;
 }
diff --git a/arch/powerpc/kernel/irq_64.c b/arch/powerpc/kernel/irq_64.c
index 938e66829e..d5c48d1b0a 100644
--- a/arch/powerpc/kernel/irq_64.c
+++ b/arch/powerpc/kernel/irq_64.c
@@ -230,7 +230,7 @@ again:
 	 * This allows interrupts to be unmasked without hard disabling, and
 	 * also without new hard interrupts coming in ahead of pending ones.
 	 */
-	asm_volatile_goto(
+	asm goto(
 "1:					\n"
 "		lbz	9,%0(13)	\n"
 "		cmpwi	9,0		\n"
diff --git a/arch/powerpc/kernel/paca.c b/arch/powerpc/kernel/paca.c
index cda4e00b67..7502066c3c 100644
--- a/arch/powerpc/kernel/paca.c
+++ b/arch/powerpc/kernel/paca.c
@@ -68,7 +68,7 @@ static void *__init alloc_shared_lppaca(unsigned long size, unsigned long limit,
 		memblock_set_bottom_up(true);
 
 		/*
-		 * See Documentation/powerpc/ultravisor.rst for more details.
+		 * See Documentation/arch/powerpc/ultravisor.rst for more details.
 		 *
 		 * UV/HV data sharing is in PAGE_SIZE granularity. In order to
 		 * minimize the number of pages shared, align the allocation to
diff --git a/arch/powerpc/kernel/pci-common.c b/arch/powerpc/kernel/pci-common.c
index 040255ddb5..d95a48eff4 100644
--- a/arch/powerpc/kernel/pci-common.c
+++ b/arch/powerpc/kernel/pci-common.c
@@ -521,8 +521,7 @@ int pci_iobar_pfn(struct pci_dev *pdev, int bar, struct vm_area_struct *vma)
  * PCI device, it tries to find the PCI device first and calls the
  * above routine
  */
-pgprot_t pci_phys_mem_access_prot(struct file *file,
-				  unsigned long pfn,
+pgprot_t pci_phys_mem_access_prot(unsigned long pfn,
 				  unsigned long size,
 				  pgprot_t prot)
 {
diff --git a/arch/powerpc/kernel/prom_init.c b/arch/powerpc/kernel/prom_init.c
index d464ba4120..e67effdba8 100644
--- a/arch/powerpc/kernel/prom_init.c
+++ b/arch/powerpc/kernel/prom_init.c
@@ -947,7 +947,7 @@ struct option_vector7 {
 } __packed;
 
 struct ibm_arch_vec {
-	struct { u32 mask, val; } pvrs[14];
+	struct { __be32 mask, val; } pvrs[14];
 
 	u8 num_vectors;
 
diff --git a/arch/powerpc/kernel/ptrace/ptrace.c b/arch/powerpc/kernel/ptrace/ptrace.c
index 5d7a72b41a..727ed4a145 100644
--- a/arch/powerpc/kernel/ptrace/ptrace.c
+++ b/arch/powerpc/kernel/ptrace/ptrace.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  PowerPC version
  *    Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
@@ -9,10 +10,6 @@
  *
  * Modified by Cort Dougan (cort@hq.fsmlabs.com)
  * and Paul Mackerras (paulus@samba.org).
- *
- * This file is subject to the terms and conditions of the GNU General
- * Public License.  See the file README.legal in the main directory of
- * this archive for more details.
  */
 
 #include <linux/regset.h>
diff --git a/arch/powerpc/kernel/rtas-proc.c b/arch/powerpc/kernel/rtas-proc.c
index 9454b8395b..f38df72e64 100644
--- a/arch/powerpc/kernel/rtas-proc.c
+++ b/arch/powerpc/kernel/rtas-proc.c
@@ -752,6 +752,8 @@ static int ppc_rtas_tone_volume_show(struct seq_file *m, void *v)
 
 /**
  * ppc_rtas_rmo_buf_show() - Describe RTAS-addressable region for user space.
+ * @m: seq_file output target.
+ * @v: Unused.
  *
  * Base + size description of a range of RTAS-addressable memory set
  * aside for user space to use as work area(s) for certain RTAS
diff --git a/arch/powerpc/kernel/setup-common.c b/arch/powerpc/kernel/setup-common.c
index 20f72cd1d8..9b142b9d51 100644
--- a/arch/powerpc/kernel/setup-common.c
+++ b/arch/powerpc/kernel/setup-common.c
@@ -22,7 +22,6 @@
 #include <linux/seq_file.h>
 #include <linux/ioport.h>
 #include <linux/console.h>
-#include <linux/screen_info.h>
 #include <linux/root_dev.h>
 #include <linux/cpu.h>
 #include <linux/unistd.h>
@@ -98,21 +97,6 @@ int boot_cpu_hwid = -1;
 int dcache_bsize;
 int icache_bsize;
 
-/*
- * This still seems to be needed... -- paulus
- */ 
-struct screen_info screen_info = {
-	.orig_x = 0,
-	.orig_y = 25,
-	.orig_video_cols = 80,
-	.orig_video_lines = 25,
-	.orig_video_isVGA = 1,
-	.orig_video_points = 16
-};
-#if defined(CONFIG_FB_VGA16_MODULE)
-EXPORT_SYMBOL(screen_info);
-#endif
-
 /* Variables required to store legacy IO irq routing */
 int of_i8042_kbd_irq;
 EXPORT_SYMBOL_GPL(of_i8042_kbd_irq);
@@ -601,7 +585,6 @@ struct seq_buf ppc_hw_desc __initdata = {
 	.buffer = ppc_hw_desc_buf,
 	.size = sizeof(ppc_hw_desc_buf),
 	.len = 0,
-	.readpos = 0,
 };
 
 static __init void probe_machine(void)
diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c
index 246201d0d8..2f19d5e944 100644
--- a/arch/powerpc/kernel/setup_64.c
+++ b/arch/powerpc/kernel/setup_64.c
@@ -364,7 +364,7 @@ void __init early_setup(unsigned long dt_ptr)
 	 */
 	initialise_paca(&boot_paca, 0);
 	fixup_boot_paca(&boot_paca);
-	WARN_ON(local_paca != 0);
+	WARN_ON(local_paca);
 	setup_paca(&boot_paca); /* install the paca into registers */
 
 	/* -------- printk is now safe to use ------- */
diff --git a/arch/powerpc/kernel/signal.c b/arch/powerpc/kernel/signal.c
index 68a91e553e..aa17e62f37 100644
--- a/arch/powerpc/kernel/signal.c
+++ b/arch/powerpc/kernel/signal.c
@@ -1,12 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * Common signal handling code for both 32 and 64 bits
  *
  *    Copyright (c) 2007 Benjamin Herrenschmidt, IBM Corporation
  *    Extracted from signal_32.c and signal_64.c
- *
- * This file is subject to the terms and conditions of the GNU General
- * Public License.  See the file README.legal in the main directory of
- * this archive for more details.
  */
 
 #include <linux/resume_user_mode.h>
diff --git a/arch/powerpc/kernel/signal.h b/arch/powerpc/kernel/signal.h
index a429c57ed4..58ecea1cdc 100644
--- a/arch/powerpc/kernel/signal.h
+++ b/arch/powerpc/kernel/signal.h
@@ -1,10 +1,7 @@
-/*
+/* SPDX-License-Identifier: GPL-2.0-or-later
+ *
  *    Copyright (c) 2007 Benjamin Herrenschmidt, IBM Corporation
  *    Extracted from signal_32.c and signal_64.c
- *
- * This file is subject to the terms and conditions of the GNU General
- * Public License.  See the file README.legal in the main directory of
- * this archive for more details.
  */
 
 #ifndef _POWERPC_ARCH_SIGNAL_H
diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c
index 5826f5108a..ab691c89d7 100644
--- a/arch/powerpc/kernel/smp.c
+++ b/arch/powerpc/kernel/smp.c
@@ -1051,7 +1051,7 @@ static struct sched_domain_topology_level powerpc_topology[] = {
 #endif
 	{ shared_cache_mask, powerpc_shared_cache_flags, SD_INIT_NAME(CACHE) },
 	{ cpu_mc_mask, SD_INIT_NAME(MC) },
-	{ cpu_cpu_mask, SD_INIT_NAME(DIE) },
+	{ cpu_cpu_mask, SD_INIT_NAME(PKG) },
 	{ NULL, },
 };
 
@@ -1595,7 +1595,7 @@ static void add_cpu_to_masks(int cpu)
 	/* Skip all CPUs already part of current CPU core mask */
 	cpumask_andnot(mask, cpu_online_mask, cpu_core_mask(cpu));
 
-	/* If chip_id is -1; limit the cpu_core_mask to within DIE*/
+	/* If chip_id is -1; limit the cpu_core_mask to within PKG */
 	if (chip_id == -1)
 		cpumask_and(mask, mask, cpu_cpu_mask(cpu));
 
@@ -1629,7 +1629,7 @@ void start_secondary(void *unused)
 
 	smp_store_cpu_info(cpu);
 	set_dec(tb_ticks_per_jiffy);
-	rcu_cpu_starting(cpu);
+	rcutree_report_cpu_starting(cpu);
 	cpu_callin_map[cpu] = 1;
 
 	if (smp_ops->setup_cpu)
diff --git a/arch/powerpc/kernel/syscalls/syscall.tbl b/arch/powerpc/kernel/syscalls/syscall.tbl
index 20e50586e8..7fab411378 100644
--- a/arch/powerpc/kernel/syscalls/syscall.tbl
+++ b/arch/powerpc/kernel/syscalls/syscall.tbl
@@ -294,7 +294,7 @@
 233	32	fadvise64			sys_ppc32_fadvise64		compat_sys_ppc32_fadvise64
 233	64	fadvise64			sys_fadvise64
 234	nospu	exit_group			sys_exit_group
-235	nospu	lookup_dcookie			sys_lookup_dcookie		compat_sys_lookup_dcookie
+235	nospu	lookup_dcookie			sys_ni_syscall
 236	common	epoll_create			sys_epoll_create
 237	common	epoll_ctl			sys_epoll_ctl
 238	common	epoll_wait			sys_epoll_wait
@@ -539,3 +539,7 @@
 450 	nospu	set_mempolicy_home_node		sys_set_mempolicy_home_node
 451	common	cachestat			sys_cachestat
 452	common	fchmodat2			sys_fchmodat2
+453	common	map_shadow_stack		sys_ni_syscall
+454	common	futex_wake			sys_futex_wake
+455	common	futex_wait			sys_futex_wait
+456	common	futex_requeue			sys_futex_requeue
diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c
index fe3f720c9c..11e062b47d 100644
--- a/arch/powerpc/kernel/traps.c
+++ b/arch/powerpc/kernel/traps.c
@@ -157,7 +157,7 @@ static int die_owner = -1;
 static unsigned int die_nest_count;
 static int die_counter;
 
-extern void panic_flush_kmsg_start(void)
+void panic_flush_kmsg_start(void)
 {
 	/*
 	 * These are mostly taken from kernel/panic.c, but tries to do
@@ -170,7 +170,7 @@ extern void panic_flush_kmsg_start(void)
 	bust_spinlocks(1);
 }
 
-extern void panic_flush_kmsg_end(void)
+void panic_flush_kmsg_end(void)
 {
 	kmsg_dump(KMSG_DUMP_PANIC);
 	bust_spinlocks(0);
@@ -1439,10 +1439,12 @@ static int emulate_instruction(struct pt_regs *regs)
 	return -EINVAL;
 }
 
+#ifdef CONFIG_GENERIC_BUG
 int is_valid_bugaddr(unsigned long addr)
 {
 	return is_kernel_addr(addr);
 }
+#endif
 
 #ifdef CONFIG_MATH_EMULATION
 static int emulate_math(struct pt_regs *regs)
-- 
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