19 files changed, 120 insertions, 51 deletions

diff --git a/arch/powerpc/include/asm/cpu_has_feature.h b/arch/powerpc/include/asm/cpu_has_feature.h
index 727d4b321937..0efabccd820c 100644
--- a/arch/powerpc/include/asm/cpu_has_feature.h
+++ b/arch/powerpc/include/asm/cpu_has_feature.h
@@ -29,7 +29,7 @@ static __always_inline bool cpu_has_feature(unsigned long feature)
 #endif
 
 #ifdef CONFIG_JUMP_LABEL_FEATURE_CHECK_DEBUG
-	if (!static_key_initialized) {
+	if (!static_key_feature_checks_initialized) {
 		printk("Warning! cpu_has_feature() used prior to jump label init!\n");
 		dump_stack();
 		return early_cpu_has_feature(feature);
diff --git a/arch/powerpc/include/asm/eeh.h b/arch/powerpc/include/asm/eeh.h
index 514dd056c2c8..91a9fd53254f 100644
--- a/arch/powerpc/include/asm/eeh.h
+++ b/arch/powerpc/include/asm/eeh.h
@@ -82,7 +82,7 @@ struct eeh_pe {
 	int false_positives;		/* Times of reported #ff's	*/
 	atomic_t pass_dev_cnt;		/* Count of passed through devs	*/
 	struct eeh_pe *parent;		/* Parent PE			*/
-	void *data;			/* PE auxillary data		*/
+	void *data;			/* PE auxiliary data		*/
 	struct list_head child_list;	/* List of PEs below this PE	*/
 	struct list_head child;		/* Memb. child_list/eeh_phb_pe	*/
 	struct list_head edevs;		/* List of eeh_dev in this PE	*/
diff --git a/arch/powerpc/include/asm/fadump-internal.h b/arch/powerpc/include/asm/fadump-internal.h
index 27f9e11eda28..e83869a4eb6a 100644
--- a/arch/powerpc/include/asm/fadump-internal.h
+++ b/arch/powerpc/include/asm/fadump-internal.h
@@ -42,13 +42,38 @@ static inline u64 fadump_str_to_u64(const char *str)
 
 #define FADUMP_CPU_UNKNOWN		(~((u32)0))
 
-#define FADUMP_CRASH_INFO_MAGIC		fadump_str_to_u64("FADMPINF")
+/*
+ * The introduction of new fields in the fadump crash info header has
+ * led to a change in the magic key from `FADMPINF` to `FADMPSIG` for
+ * identifying a kernel crash from an old kernel.
+ *
+ * To prevent the need for further changes to the magic number in the
+ * event of future modifications to the fadump crash info header, a
+ * version field has been introduced to track the fadump crash info
+ * header version.
+ *
+ * Consider a few points before adding new members to the fadump crash info
+ * header structure:
+ *
+ *  - Append new members; avoid adding them in between.
+ *  - Non-primitive members should have a size member as well.
+ *  - For every change in the fadump header, increment the
+ *    fadump header version. This helps the updated kernel decide how to
+ *    handle kernel dumps from older kernels.
+ */
+#define FADUMP_CRASH_INFO_MAGIC_OLD	fadump_str_to_u64("FADMPINF")
+#define FADUMP_CRASH_INFO_MAGIC		fadump_str_to_u64("FADMPSIG")
+#define FADUMP_HEADER_VERSION		1
 
 /* fadump crash info structure */
 struct fadump_crash_info_header {
 	u64		magic_number;
-	u64		elfcorehdr_addr;
+	u32		version;
 	u32		crashing_cpu;
+	u64		vmcoreinfo_raddr;
+	u64		vmcoreinfo_size;
+	u32		pt_regs_sz;
+	u32		cpu_mask_sz;
 	struct pt_regs	regs;
 	struct cpumask	cpu_mask;
 };
@@ -94,9 +119,13 @@ struct fw_dump {
 	u64		boot_mem_regs_cnt;
 
 	unsigned long	fadumphdr_addr;
+	u64		elfcorehdr_addr;
+	u64		elfcorehdr_size;
 	unsigned long	cpu_notes_buf_vaddr;
 	unsigned long	cpu_notes_buf_size;
 
+	unsigned long	param_area;
+
 	/*
 	 * Maximum size supported by firmware to copy from source to
 	 * destination address per entry.
@@ -111,6 +140,7 @@ struct fw_dump {
 	unsigned long	dump_active:1;
 	unsigned long	dump_registered:1;
 	unsigned long	nocma:1;
+	unsigned long	param_area_supported:1;
 
 	struct fadump_ops	*ops;
 };
@@ -129,6 +159,7 @@ struct fadump_ops {
 				      struct seq_file *m);
 	void	(*fadump_trigger)(struct fadump_crash_info_header *fdh,
 				  const char *msg);
+	int	(*fadump_max_boot_mem_rgns)(void);
 };
 
 /* Helper functions */
@@ -136,7 +167,6 @@ s32 __init fadump_setup_cpu_notes_buf(u32 num_cpus);
 void fadump_free_cpu_notes_buf(void);
 u32 *__init fadump_regs_to_elf_notes(u32 *buf, struct pt_regs *regs);
 void __init fadump_update_elfcore_header(char *bufp);
-bool is_fadump_boot_mem_contiguous(void);
 bool is_fadump_reserved_mem_contiguous(void);
 
 #else /* !CONFIG_PRESERVE_FA_DUMP */
diff --git a/arch/powerpc/include/asm/fadump.h b/arch/powerpc/include/asm/fadump.h
index 526a6a647312..ef40c9b6972a 100644
--- a/arch/powerpc/include/asm/fadump.h
+++ b/arch/powerpc/include/asm/fadump.h
@@ -19,12 +19,14 @@ extern int is_fadump_active(void);
 extern int should_fadump_crash(void);
 extern void crash_fadump(struct pt_regs *, const char *);
 extern void fadump_cleanup(void);
+extern void fadump_append_bootargs(void);
 
 #else	/* CONFIG_FA_DUMP */
 static inline int is_fadump_active(void) { return 0; }
 static inline int should_fadump_crash(void) { return 0; }
 static inline void crash_fadump(struct pt_regs *regs, const char *str) { }
 static inline void fadump_cleanup(void) { }
+static inline void fadump_append_bootargs(void) { }
 #endif /* !CONFIG_FA_DUMP */
 
 #if defined(CONFIG_FA_DUMP) || defined(CONFIG_PRESERVE_FA_DUMP)
diff --git a/arch/powerpc/include/asm/feature-fixups.h b/arch/powerpc/include/asm/feature-fixups.h
index 77824bd289a3..17d168dd8b49 100644
--- a/arch/powerpc/include/asm/feature-fixups.h
+++ b/arch/powerpc/include/asm/feature-fixups.h
@@ -291,6 +291,8 @@ extern long __start___rfi_flush_fixup, __stop___rfi_flush_fixup;
 extern long __start___barrier_nospec_fixup, __stop___barrier_nospec_fixup;
 extern long __start__btb_flush_fixup, __stop__btb_flush_fixup;
 
+extern bool static_key_feature_checks_initialized;
+
 void apply_feature_fixups(void);
 void update_mmu_feature_fixups(unsigned long mask);
 void setup_feature_keys(void);
diff --git a/arch/powerpc/include/asm/hvcall.h b/arch/powerpc/include/asm/hvcall.h
index a41e542ba94d..7a8495660c2f 100644
--- a/arch/powerpc/include/asm/hvcall.h
+++ b/arch/powerpc/include/asm/hvcall.h
@@ -524,7 +524,7 @@ long plpar_hcall_norets_notrace(unsigned long opcode, ...);
  * Used for all but the craziest of phyp interfaces (see plpar_hcall9)
  */
 #define PLPAR_HCALL_BUFSIZE 4
-long plpar_hcall(unsigned long opcode, unsigned long *retbuf, ...);
+long plpar_hcall(unsigned long opcode, unsigned long retbuf[static PLPAR_HCALL_BUFSIZE], ...);
 
 /**
  * plpar_hcall_raw: - Make a hypervisor call without calculating hcall stats
@@ -538,7 +538,7 @@ long plpar_hcall(unsigned long opcode, unsigned long *retbuf, ...);
  * plpar_hcall, but plpar_hcall_raw works in real mode and does not
  * calculate hypervisor call statistics.
  */
-long plpar_hcall_raw(unsigned long opcode, unsigned long *retbuf, ...);
+long plpar_hcall_raw(unsigned long opcode, unsigned long retbuf[static PLPAR_HCALL_BUFSIZE], ...);
 
 /**
  * plpar_hcall9: - Make a pseries hypervisor call with up to 9 return arguments
@@ -549,8 +549,8 @@ long plpar_hcall_raw(unsigned long opcode, unsigned long *retbuf, ...);
  * PLPAR_HCALL9_BUFSIZE to size the return argument buffer.
  */
 #define PLPAR_HCALL9_BUFSIZE 9
-long plpar_hcall9(unsigned long opcode, unsigned long *retbuf, ...);
-long plpar_hcall9_raw(unsigned long opcode, unsigned long *retbuf, ...);
+long plpar_hcall9(unsigned long opcode, unsigned long retbuf[static PLPAR_HCALL9_BUFSIZE], ...);
+long plpar_hcall9_raw(unsigned long opcode, unsigned long retbuf[static PLPAR_HCALL9_BUFSIZE], ...);
 
 /* pseries hcall tracing */
 extern struct static_key hcall_tracepoint_key;
@@ -570,7 +570,7 @@ struct hvcall_mpp_data {
 	unsigned long backing_mem;
 };
 
-int h_get_mpp(struct hvcall_mpp_data *);
+long h_get_mpp(struct hvcall_mpp_data *mpp_data);
 
 struct hvcall_mpp_x_data {
 	unsigned long coalesced_bytes;
diff --git a/arch/powerpc/include/asm/interrupt.h b/arch/powerpc/include/asm/interrupt.h
index 7b610864b364..2d6c886b40f4 100644
--- a/arch/powerpc/include/asm/interrupt.h
+++ b/arch/powerpc/include/asm/interrupt.h
@@ -336,6 +336,14 @@ static inline void interrupt_nmi_enter_prepare(struct pt_regs *regs, struct inte
 	if (IS_ENABLED(CONFIG_KASAN))
 		return;
 
+	/*
+	 * Likewise, do not use it in real mode if percpu first chunk is not
+	 * embedded. With CONFIG_NEED_PER_CPU_PAGE_FIRST_CHUNK enabled there
+	 * are chances where percpu allocation can come from vmalloc area.
+	 */
+	if (percpu_first_chunk_is_paged)
+		return;
+
 	/* Otherwise, it should be safe to call it */
 	nmi_enter();
 }
@@ -351,6 +359,8 @@ static inline void interrupt_nmi_exit_prepare(struct pt_regs *regs, struct inter
 		// no nmi_exit for a pseries hash guest taking a real mode exception
 	} else if (IS_ENABLED(CONFIG_KASAN)) {
 		// no nmi_exit for KASAN in real mode
+	} else if (percpu_first_chunk_is_paged) {
+		// no nmi_exit if percpu first chunk is not embedded
 	} else {
 		nmi_exit();
 	}
diff --git a/arch/powerpc/include/asm/io.h b/arch/powerpc/include/asm/io.h
index 08c550ed49be..52e1b1d15ff6 100644
--- a/arch/powerpc/include/asm/io.h
+++ b/arch/powerpc/include/asm/io.h
@@ -37,7 +37,7 @@ extern struct pci_dev *isa_bridge_pcidev;
  * define properly based on the platform
  */
 #ifndef CONFIG_PCI
-#define _IO_BASE	0
+#define _IO_BASE	POISON_POINTER_DELTA
 #define _ISA_MEM_BASE	0
 #define PCI_DRAM_OFFSET 0
 #elif defined(CONFIG_PPC32)
@@ -585,12 +585,12 @@ __do_out_asm(_rec_outl, "stwbrx")
 #define __do_inw(port)		_rec_inw(port)
 #define __do_inl(port)		_rec_inl(port)
 #else /* CONFIG_PPC32 */
-#define __do_outb(val, port)	writeb(val,(PCI_IO_ADDR)_IO_BASE+port);
-#define __do_outw(val, port)	writew(val,(PCI_IO_ADDR)_IO_BASE+port);
-#define __do_outl(val, port)	writel(val,(PCI_IO_ADDR)_IO_BASE+port);
-#define __do_inb(port)		readb((PCI_IO_ADDR)_IO_BASE + port);
-#define __do_inw(port)		readw((PCI_IO_ADDR)_IO_BASE + port);
-#define __do_inl(port)		readl((PCI_IO_ADDR)_IO_BASE + port);
+#define __do_outb(val, port)	writeb(val,(PCI_IO_ADDR)(_IO_BASE+port));
+#define __do_outw(val, port)	writew(val,(PCI_IO_ADDR)(_IO_BASE+port));
+#define __do_outl(val, port)	writel(val,(PCI_IO_ADDR)(_IO_BASE+port));
+#define __do_inb(port)		readb((PCI_IO_ADDR)(_IO_BASE + port));
+#define __do_inw(port)		readw((PCI_IO_ADDR)(_IO_BASE + port));
+#define __do_inl(port)		readl((PCI_IO_ADDR)(_IO_BASE + port));
 #endif /* !CONFIG_PPC32 */
 
 #ifdef CONFIG_EEH
@@ -606,12 +606,12 @@ __do_out_asm(_rec_outl, "stwbrx")
 #define __do_writesw(a, b, n)	_outsw(PCI_FIX_ADDR(a),(b),(n))
 #define __do_writesl(a, b, n)	_outsl(PCI_FIX_ADDR(a),(b),(n))
 
-#define __do_insb(p, b, n)	readsb((PCI_IO_ADDR)_IO_BASE+(p), (b), (n))
-#define __do_insw(p, b, n)	readsw((PCI_IO_ADDR)_IO_BASE+(p), (b), (n))
-#define __do_insl(p, b, n)	readsl((PCI_IO_ADDR)_IO_BASE+(p), (b), (n))
-#define __do_outsb(p, b, n)	writesb((PCI_IO_ADDR)_IO_BASE+(p),(b),(n))
-#define __do_outsw(p, b, n)	writesw((PCI_IO_ADDR)_IO_BASE+(p),(b),(n))
-#define __do_outsl(p, b, n)	writesl((PCI_IO_ADDR)_IO_BASE+(p),(b),(n))
+#define __do_insb(p, b, n)	readsb((PCI_IO_ADDR)(_IO_BASE+(p)), (b), (n))
+#define __do_insw(p, b, n)	readsw((PCI_IO_ADDR)(_IO_BASE+(p)), (b), (n))
+#define __do_insl(p, b, n)	readsl((PCI_IO_ADDR)(_IO_BASE+(p)), (b), (n))
+#define __do_outsb(p, b, n)	writesb((PCI_IO_ADDR)(_IO_BASE+(p)),(b),(n))
+#define __do_outsw(p, b, n)	writesw((PCI_IO_ADDR)(_IO_BASE+(p)),(b),(n))
+#define __do_outsl(p, b, n)	writesl((PCI_IO_ADDR)(_IO_BASE+(p)),(b),(n))
 
 #define __do_memset_io(addr, c, n)	\
 				_memset_io(PCI_FIX_ADDR(addr), c, n)
@@ -982,7 +982,7 @@ static inline phys_addr_t page_to_phys(struct page *page)
 }
 
 /*
- * 32 bits still uses virt_to_bus() for it's implementation of DMA
+ * 32 bits still uses virt_to_bus() for its implementation of DMA
  * mappings se we have to keep it defined here. We also have some old
  * drivers (shame shame shame) that use bus_to_virt() and haven't been
  * fixed yet so I need to define it here.
diff --git a/arch/powerpc/include/asm/kexec.h b/arch/powerpc/include/asm/kexec.h
index fdb90e24dc74..95a98b390d62 100644
--- a/arch/powerpc/include/asm/kexec.h
+++ b/arch/powerpc/include/asm/kexec.h
@@ -135,6 +135,17 @@ static inline void crash_setup_regs(struct pt_regs *newregs,
 		ppc_save_regs(newregs);
 }
 
+#ifdef CONFIG_CRASH_HOTPLUG
+void arch_crash_handle_hotplug_event(struct kimage *image, void *arg);
+#define arch_crash_handle_hotplug_event arch_crash_handle_hotplug_event
+
+int arch_crash_hotplug_support(struct kimage *image, unsigned long kexec_flags);
+#define arch_crash_hotplug_support arch_crash_hotplug_support
+
+unsigned int arch_crash_get_elfcorehdr_size(void);
+#define crash_get_elfcorehdr_size arch_crash_get_elfcorehdr_size
+#endif /* CONFIG_CRASH_HOTPLUG */
+
 extern int crashing_cpu;
 extern void crash_send_ipi(void (*crash_ipi_callback)(struct pt_regs *));
 extern void crash_ipi_callback(struct pt_regs *regs);
@@ -185,6 +196,10 @@ static inline void crash_send_ipi(void (*crash_ipi_callback)(struct pt_regs *))
 
 #endif /* CONFIG_CRASH_DUMP */
 
+#if defined(CONFIG_KEXEC_FILE) || defined(CONFIG_CRASH_DUMP)
+int update_cpus_node(void *fdt);
+#endif
+
 #ifdef CONFIG_PPC_BOOK3S_64
 #include <asm/book3s/64/kexec.h>
 #endif
diff --git a/arch/powerpc/include/asm/kexec_ranges.h b/arch/powerpc/include/asm/kexec_ranges.h
index f83866a19e87..14055896cbcb 100644
--- a/arch/powerpc/include/asm/kexec_ranges.h
+++ b/arch/powerpc/include/asm/kexec_ranges.h
@@ -7,19 +7,9 @@
 void sort_memory_ranges(struct crash_mem *mrngs, bool merge);
 struct crash_mem *realloc_mem_ranges(struct crash_mem **mem_ranges);
 int add_mem_range(struct crash_mem **mem_ranges, u64 base, u64 size);
-int add_tce_mem_ranges(struct crash_mem **mem_ranges);
-int add_initrd_mem_range(struct crash_mem **mem_ranges);
-#ifdef CONFIG_PPC_64S_HASH_MMU
-int add_htab_mem_range(struct crash_mem **mem_ranges);
-#else
-static inline int add_htab_mem_range(struct crash_mem **mem_ranges)
-{
-	return 0;
-}
-#endif
-int add_kernel_mem_range(struct crash_mem **mem_ranges);
-int add_rtas_mem_range(struct crash_mem **mem_ranges);
-int add_opal_mem_range(struct crash_mem **mem_ranges);
-int add_reserved_mem_ranges(struct crash_mem **mem_ranges);
-
+int remove_mem_range(struct crash_mem **mem_ranges, u64 base, u64 size);
+int get_exclude_memory_ranges(struct crash_mem **mem_ranges);
+int get_reserved_memory_ranges(struct crash_mem **mem_ranges);
+int get_crash_memory_ranges(struct crash_mem **mem_ranges);
+int get_usable_memory_ranges(struct crash_mem **mem_ranges);
 #endif /* _ASM_POWERPC_KEXEC_RANGES_H */
diff --git a/arch/powerpc/include/asm/mmu.h b/arch/powerpc/include/asm/mmu.h
index 3b72c7ed24cf..24f830cf9bb4 100644
--- a/arch/powerpc/include/asm/mmu.h
+++ b/arch/powerpc/include/asm/mmu.h
@@ -251,7 +251,7 @@ static __always_inline bool mmu_has_feature(unsigned long feature)
 #endif
 
 #ifdef CONFIG_JUMP_LABEL_FEATURE_CHECK_DEBUG
-	if (!static_key_initialized) {
+	if (!static_key_feature_checks_initialized) {
 		printk("Warning! mmu_has_feature() used prior to jump label init!\n");
 		dump_stack();
 		return early_mmu_has_feature(feature);
diff --git a/arch/powerpc/include/asm/module.h b/arch/powerpc/include/asm/module.h
index a8e2e8339fb7..300c777cc307 100644
--- a/arch/powerpc/include/asm/module.h
+++ b/arch/powerpc/include/asm/module.h
@@ -48,11 +48,6 @@ struct mod_arch_specific {
 	unsigned long tramp;
 	unsigned long tramp_regs;
 #endif
-
-	/* List of BUG addresses, source line numbers and filenames */
-	struct list_head bug_list;
-	struct bug_entry *bug_table;
-	unsigned int num_bugs;
 };
 
 /*
diff --git a/arch/powerpc/include/asm/opal-api.h b/arch/powerpc/include/asm/opal-api.h
index a2bc4b95e703..8c9d4b26bf57 100644
--- a/arch/powerpc/include/asm/opal-api.h
+++ b/arch/powerpc/include/asm/opal-api.h
@@ -1027,10 +1027,10 @@ struct opal_i2c_request {
  * The host will pass on OPAL, a buffer of length OPAL_SYSEPOW_MAX
  * with individual elements being 16 bits wide to fetch the system
  * wide EPOW status. Each element in the buffer will contain the
- * EPOW status in it's bit representation for a particular EPOW sub
+ * EPOW status in its bit representation for a particular EPOW sub
  * class as defined here. So multiple detailed EPOW status bits
  * specific for any sub class can be represented in a single buffer
- * element as it's bit representation.
+ * element as its bit representation.
  */
 
 /* System EPOW type */
diff --git a/arch/powerpc/include/asm/percpu.h b/arch/powerpc/include/asm/percpu.h
index 8e5b7d0b851c..634970ce13c6 100644
--- a/arch/powerpc/include/asm/percpu.h
+++ b/arch/powerpc/include/asm/percpu.h
@@ -15,6 +15,16 @@
 #endif /* CONFIG_SMP */
 #endif /* __powerpc64__ */
 
+#if defined(CONFIG_NEED_PER_CPU_PAGE_FIRST_CHUNK) && defined(CONFIG_SMP)
+#include <linux/jump_label.h>
+DECLARE_STATIC_KEY_FALSE(__percpu_first_chunk_is_paged);
+
+#define percpu_first_chunk_is_paged	\
+		(static_key_enabled(&__percpu_first_chunk_is_paged.key))
+#else
+#define percpu_first_chunk_is_paged	false
+#endif /* CONFIG_PPC64 && CONFIG_SMP */
+
 #include <asm-generic/percpu.h>
 
 #include <asm/paca.h>
diff --git a/arch/powerpc/include/asm/pmac_feature.h b/arch/powerpc/include/asm/pmac_feature.h
index 2495866f2e97..420e2878ae67 100644
--- a/arch/powerpc/include/asm/pmac_feature.h
+++ b/arch/powerpc/include/asm/pmac_feature.h
@@ -192,7 +192,7 @@ static inline long pmac_call_feature(int selector, struct device_node* node,
 
 /* PMAC_FTR_BMAC_ENABLE		(struct device_node* node, 0, int value)
  * enable/disable the bmac (ethernet) cell of a mac-io ASIC, also drive
- * it's reset line
+ * its reset line
  */
 #define PMAC_FTR_BMAC_ENABLE		PMAC_FTR_DEF(6)
 
diff --git a/arch/powerpc/include/asm/ppc-opcode.h b/arch/powerpc/include/asm/ppc-opcode.h
index 005601243dda..076ae60b4a55 100644
--- a/arch/powerpc/include/asm/ppc-opcode.h
+++ b/arch/powerpc/include/asm/ppc-opcode.h
@@ -510,6 +510,7 @@
 #define PPC_RAW_STB(r, base, i)		(0x98000000 | ___PPC_RS(r) | ___PPC_RA(base) | IMM_L(i))
 #define PPC_RAW_LBZ(r, base, i)		(0x88000000 | ___PPC_RT(r) | ___PPC_RA(base) | IMM_L(i))
 #define PPC_RAW_LDX(r, base, b)		(0x7c00002a | ___PPC_RT(r) | ___PPC_RA(base) | ___PPC_RB(b))
+#define PPC_RAW_LHA(r, base, i)		(0xa8000000 | ___PPC_RT(r) | ___PPC_RA(base) | IMM_L(i))
 #define PPC_RAW_LHZ(r, base, i)		(0xa0000000 | ___PPC_RT(r) | ___PPC_RA(base) | IMM_L(i))
 #define PPC_RAW_LHBRX(r, base, b)	(0x7c00062c | ___PPC_RT(r) | ___PPC_RA(base) | ___PPC_RB(b))
 #define PPC_RAW_LWBRX(r, base, b)	(0x7c00042c | ___PPC_RT(r) | ___PPC_RA(base) | ___PPC_RB(b))
@@ -532,6 +533,7 @@
 #define PPC_RAW_MULW(d, a, b)		(0x7c0001d6 | ___PPC_RT(d) | ___PPC_RA(a) | ___PPC_RB(b))
 #define PPC_RAW_MULHWU(d, a, b)		(0x7c000016 | ___PPC_RT(d) | ___PPC_RA(a) | ___PPC_RB(b))
 #define PPC_RAW_MULI(d, a, i)		(0x1c000000 | ___PPC_RT(d) | ___PPC_RA(a) | IMM_L(i))
+#define PPC_RAW_DIVW(d, a, b)		(0x7c0003d6 | ___PPC_RT(d) | ___PPC_RA(a) | ___PPC_RB(b))
 #define PPC_RAW_DIVWU(d, a, b)		(0x7c000396 | ___PPC_RT(d) | ___PPC_RA(a) | ___PPC_RB(b))
 #define PPC_RAW_DIVDU(d, a, b)		(0x7c000392 | ___PPC_RT(d) | ___PPC_RA(a) | ___PPC_RB(b))
 #define PPC_RAW_DIVDE(t, a, b)		(0x7c000352 | ___PPC_RT(t) | ___PPC_RA(a) | ___PPC_RB(b))
@@ -550,6 +552,8 @@
 #define PPC_RAW_XOR(d, a, b)		(0x7c000278 | ___PPC_RA(d) | ___PPC_RS(a) | ___PPC_RB(b))
 #define PPC_RAW_XORI(d, a, i)		(0x68000000 | ___PPC_RA(d) | ___PPC_RS(a) | IMM_L(i))
 #define PPC_RAW_XORIS(d, a, i)		(0x6c000000 | ___PPC_RA(d) | ___PPC_RS(a) | IMM_L(i))
+#define PPC_RAW_EXTSB(d, a)		(0x7c000774 | ___PPC_RA(d) | ___PPC_RS(a))
+#define PPC_RAW_EXTSH(d, a)		(0x7c000734 | ___PPC_RA(d) | ___PPC_RS(a))
 #define PPC_RAW_EXTSW(d, a)		(0x7c0007b4 | ___PPC_RA(d) | ___PPC_RS(a))
 #define PPC_RAW_SLW(d, a, s)		(0x7c000030 | ___PPC_RA(d) | ___PPC_RS(a) | ___PPC_RB(s))
 #define PPC_RAW_SLD(d, a, s)		(0x7c000036 | ___PPC_RA(d) | ___PPC_RS(a) | ___PPC_RB(s))
diff --git a/arch/powerpc/include/asm/processor.h b/arch/powerpc/include/asm/processor.h
index b2c51d337e60..e44cac0da346 100644
--- a/arch/powerpc/include/asm/processor.h
+++ b/arch/powerpc/include/asm/processor.h
@@ -260,7 +260,8 @@ struct thread_struct {
 	unsigned long   sier2;
 	unsigned long   sier3;
 	unsigned long	hashkeyr;
-
+	unsigned long	dexcr;
+	unsigned long	dexcr_onexec;	/* Reset value to load on exec */
 #endif
 };
 
@@ -333,6 +334,16 @@ extern int set_endian(struct task_struct *tsk, unsigned int val);
 extern int get_unalign_ctl(struct task_struct *tsk, unsigned long adr);
 extern int set_unalign_ctl(struct task_struct *tsk, unsigned int val);
 
+#ifdef CONFIG_PPC_BOOK3S_64
+
+#define PPC_GET_DEXCR_ASPECT(tsk, asp) get_dexcr_prctl((tsk), (asp))
+#define PPC_SET_DEXCR_ASPECT(tsk, asp, val) set_dexcr_prctl((tsk), (asp), (val))
+
+int get_dexcr_prctl(struct task_struct *tsk, unsigned long asp);
+int set_dexcr_prctl(struct task_struct *tsk, unsigned long asp, unsigned long val);
+
+#endif
+
 extern void load_fp_state(struct thread_fp_state *fp);
 extern void store_fp_state(struct thread_fp_state *fp);
 extern void load_vr_state(struct thread_vr_state *vr);
diff --git a/arch/powerpc/include/asm/reg.h b/arch/powerpc/include/asm/reg.h
index d3d1aea009b4..eed33cb916d0 100644
--- a/arch/powerpc/include/asm/reg.h
+++ b/arch/powerpc/include/asm/reg.h
@@ -615,7 +615,7 @@
 #define HID1_ABE	(1<<10)		/* 7450 Address Broadcast Enable */
 #define HID1_PS		(1<<16)		/* 750FX PLL selection */
 #endif
-#define SPRN_HID2	0x3F8		/* Hardware Implementation Register 2 */
+#define SPRN_HID2_750FX	0x3F8		/* IBM 750FX HID2 Register */
 #define SPRN_HID2_GEKKO	0x398		/* Gekko HID2 Register */
 #define SPRN_HID2_G2_LE	0x3F3		/* G2_LE HID2 Register */
 #define  HID2_G2_LE_HBE	(1<<18)		/* High BAT Enable (G2_LE) */
diff --git a/arch/powerpc/include/asm/uninorth.h b/arch/powerpc/include/asm/uninorth.h
index e278299b9b37..6949b5daa37d 100644
--- a/arch/powerpc/include/asm/uninorth.h
+++ b/arch/powerpc/include/asm/uninorth.h
@@ -144,7 +144,7 @@
 #define UNI_N_HWINIT_STATE_SLEEPING	0x01
 #define UNI_N_HWINIT_STATE_RUNNING	0x02
 /* This last bit appear to be used by the bootROM to know the second
- * CPU has started and will enter it's sleep loop with IP=0
+ * CPU has started and will enter its sleep loop with IP=0
  */
 #define UNI_N_HWINIT_STATE_CPU1_FLAG	0x10000000