Merge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc

* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: (34 commits)
  powerpc/mpic: Fix mask/unmask timeout message
  powerpc/pseries: Add BNX2=m to defconfig
  powerpc: Enable 64kB pages and 1024 threads in pseries config
  powerpc: Disable mcount tracers in pseries defconfig
  powerpc/boot/dts: Install dts from the right directory
  powerpc: machine_check_generic is wrong on 64bit
  powerpc: Check RTAS extended log flag before checking length
  powerpc: Fix corruption when grabbing FWNMI data
  powerpc: Rework pseries machine check handler
  powerpc: Don't silently handle machine checks from userspace
  powerpc: Remove duplicate debugger hook in machine_check_exception
  powerpc: Never halt RTAS error logging after receiving an unrecoverable machine check
  powerpc: Don't force MSR_RI in machine_check_exception
  powerpc: Print 32 bits of DSISR in show_regs
  powerpc/kdump: Disable ftrace during kexec
  powerpc/kdump: Move crash_kexec_stop_spus to kdump crash handler
  powerpc/kexec: Remove empty ppc_md.machine_kexec_prepare
  powerpc/kexec: Don't initialise kexec hooks to default handlers
  powerpc/kdump: Remove ppc_md.machine_crash_shutdown
  powerpc/kexec: Remove ppc_md.machine_kexec
  ...

arch/powerpc/boot/Makefile

@@ -368,7 +368,7 @@ INSTALL := install
 extra-installed		:= $(patsubst $(obj)/%, $(DESTDIR)$(WRAPPER_OBJDIR)/%, $(extra-y))
 hostprogs-installed	:= $(patsubst %, $(DESTDIR)$(WRAPPER_BINDIR)/%, $(hostprogs-y))
 wrapper-installed	:= $(DESTDIR)$(WRAPPER_BINDIR)/wrapper
-dts-installed		:= $(patsubst $(obj)/dts/%, $(DESTDIR)$(WRAPPER_DTSDIR)/%, $(wildcard $(obj)/dts/*.dts))
+dts-installed		:= $(patsubst $(dtstree)/%, $(DESTDIR)$(WRAPPER_DTSDIR)/%, $(wildcard $(dtstree)/*.dts))
 
 all-installed		:= $(extra-installed) $(hostprogs-installed) $(wrapper-installed) $(dts-installed)
 

arch/powerpc/boot/dts/mpc8308rdb.dts

@@ -109,7 +109,7 @@
 		#address-cells = <1>;
 		#size-cells = <1>;
 		device_type = "soc";
-		compatible = "fsl,mpc8315-immr", "simple-bus";
+		compatible = "fsl,mpc8308-immr", "simple-bus";
 		ranges = <0 0xe0000000 0x00100000>;
 		reg = <0xe0000000 0x00000200>;
 		bus-frequency = <0>;

arch/powerpc/boot/dts/p1022ds.dts

@@ -291,13 +291,13 @@
 			ranges = <0x0 0xc100 0x200>;
 			cell-index = <1>;
 			dma00: dma-channel@0 {
-				compatible = "fsl,eloplus-dma-channel";
+				compatible = "fsl,ssi-dma-channel";
 				reg = <0x0 0x80>;
 				cell-index = <0>;
 				interrupts = <76 2>;
 			};
 			dma01: dma-channel@80 {
-				compatible = "fsl,eloplus-dma-channel";
+				compatible = "fsl,ssi-dma-channel";
 				reg = <0x80 0x80>;
 				cell-index = <1>;
 				interrupts = <77 2>;

arch/powerpc/configs/pseries_defconfig

@@ -2,7 +2,7 @@ CONFIG_PPC64=y
 CONFIG_ALTIVEC=y
 CONFIG_VSX=y
 CONFIG_SMP=y
-CONFIG_NR_CPUS=128
+CONFIG_NR_CPUS=1024
 CONFIG_EXPERIMENTAL=y
 CONFIG_SYSVIPC=y
 CONFIG_POSIX_MQUEUE=y
@@ -45,6 +45,8 @@ CONFIG_KEXEC=y
 CONFIG_IRQ_ALL_CPUS=y
 CONFIG_MEMORY_HOTPLUG=y
 CONFIG_MEMORY_HOTREMOVE=y
+CONFIG_PPC_64K_PAGES=y
+CONFIG_PPC_SUBPAGE_PROT=y
 CONFIG_SCHED_SMT=y
 CONFIG_HOTPLUG_PCI=m
 CONFIG_HOTPLUG_PCI_RPA=m
@@ -184,6 +186,7 @@ CONFIG_ACENIC_OMIT_TIGON_I=y
 CONFIG_E1000=y
 CONFIG_E1000E=y
 CONFIG_TIGON3=y
+CONFIG_BNX2=m
 CONFIG_CHELSIO_T1=m
 CONFIG_CHELSIO_T3=m
 CONFIG_EHEA=y
@@ -311,9 +314,7 @@ CONFIG_DEBUG_KERNEL=y
 # CONFIG_RCU_CPU_STALL_DETECTOR is not set
 CONFIG_LATENCYTOP=y
 CONFIG_SYSCTL_SYSCALL_CHECK=y
-CONFIG_IRQSOFF_TRACER=y
 CONFIG_SCHED_TRACER=y
-CONFIG_STACK_TRACER=y
 CONFIG_BLK_DEV_IO_TRACE=y
 CONFIG_DEBUG_STACKOVERFLOW=y
 CONFIG_DEBUG_STACK_USAGE=y

arch/powerpc/include/asm/feature-fixups.h

@@ -37,18 +37,21 @@ label##2:						\
 	.align 2;					\
 label##3:
 
-#define MAKE_FTR_SECTION_ENTRY(msk, val, label, sect)	\
-label##4:						\
-	.popsection;					\
-	.pushsection sect,"a";				\
-	.align 3;					\
-label##5:					       	\
-	FTR_ENTRY_LONG msk;				\
-	FTR_ENTRY_LONG val;				\
-	FTR_ENTRY_OFFSET label##1b-label##5b;		\
-	FTR_ENTRY_OFFSET label##2b-label##5b;	 	\
-	FTR_ENTRY_OFFSET label##3b-label##5b;		\
-	FTR_ENTRY_OFFSET label##4b-label##5b;	 	\
+#define MAKE_FTR_SECTION_ENTRY(msk, val, label, sect)		\
+label##4:							\
+	.popsection;						\
+	.pushsection sect,"a";					\
+	.align 3;						\
+label##5:							\
+	FTR_ENTRY_LONG msk;					\
+	FTR_ENTRY_LONG val;					\
+	FTR_ENTRY_OFFSET label##1b-label##5b;			\
+	FTR_ENTRY_OFFSET label##2b-label##5b;			\
+	FTR_ENTRY_OFFSET label##3b-label##5b;			\
+	FTR_ENTRY_OFFSET label##4b-label##5b;			\
+	.ifgt (label##4b-label##3b)-(label##2b-label##1b);	\
+	.error "Feature section else case larger than body";	\
+	.endif;							\
 	.popsection;
 
 

arch/powerpc/include/asm/immap_qe.h

@@ -467,13 +467,22 @@ struct qe_immap {
 extern struct qe_immap __iomem *qe_immr;
 extern phys_addr_t get_qe_base(void);
 
-static inline unsigned long immrbar_virt_to_phys(void *address)
+/*
+ * Returns the offset within the QE address space of the given pointer.
+ *
+ * Note that the QE does not support 36-bit physical addresses, so if
+ * get_qe_base() returns a number above 4GB, the caller will probably fail.
+ */
+static inline phys_addr_t immrbar_virt_to_phys(void *address)
 {
-	if ( ((u32)address >= (u32)qe_immr) &&
-			((u32)address < ((u32)qe_immr + QE_IMMAP_SIZE)) )
-		return (unsigned long)(address - (u32)qe_immr +
-				(u32)get_qe_base());
-	return (unsigned long)virt_to_phys(address);
+	void *q = (void *)qe_immr;
+
+	/* Is it a MURAM address? */
+	if ((address >= q) && (address < (q + QE_IMMAP_SIZE)))
+		return get_qe_base() + (address - q);
+
+	/* It's an address returned by kmalloc */
+	return virt_to_phys(address);
 }
 
 #endif /* __KERNEL__ */

arch/powerpc/include/asm/irqflags.h

@@ -12,24 +12,44 @@
 
 #else
 #ifdef CONFIG_TRACE_IRQFLAGS
+#ifdef CONFIG_IRQSOFF_TRACER
+/*
+ * Since the ftrace irqsoff latency trace checks CALLER_ADDR1,
+ * which is the stack frame here, we need to force a stack frame
+ * in case we came from user space.
+ */
+#define TRACE_WITH_FRAME_BUFFER(func)		\
+	mflr	r0;				\
+	stdu	r1, -32(r1);			\
+	std	r0, 16(r1);			\
+	stdu	r1, -32(r1);			\
+	bl func;				\
+	ld	r1, 0(r1);			\
+	ld	r1, 0(r1);
+#else
+#define TRACE_WITH_FRAME_BUFFER(func)		\
+	bl func;
+#endif
+
 /*
  * Most of the CPU's IRQ-state tracing is done from assembly code; we
  * have to call a C function so call a wrapper that saves all the
  * C-clobbered registers.
  */
-#define TRACE_ENABLE_INTS	bl .trace_hardirqs_on
-#define TRACE_DISABLE_INTS	bl .trace_hardirqs_off
-#define TRACE_AND_RESTORE_IRQ_PARTIAL(en,skip)	\
-	cmpdi	en,0;				\
-	bne	95f;				\
-	stb	en,PACASOFTIRQEN(r13);		\
-	bl	.trace_hardirqs_off;		\
-	b	skip;				\
-95:	bl	.trace_hardirqs_on;		\
+#define TRACE_ENABLE_INTS	TRACE_WITH_FRAME_BUFFER(.trace_hardirqs_on)
+#define TRACE_DISABLE_INTS	TRACE_WITH_FRAME_BUFFER(.trace_hardirqs_off)
+
+#define TRACE_AND_RESTORE_IRQ_PARTIAL(en,skip)		\
+	cmpdi	en,0;					\
+	bne	95f;					\
+	stb	en,PACASOFTIRQEN(r13);			\
+	TRACE_WITH_FRAME_BUFFER(.trace_hardirqs_off)	\
+	b	skip;					\
+95:	TRACE_WITH_FRAME_BUFFER(.trace_hardirqs_on)	\
 	li	en,1;
 #define TRACE_AND_RESTORE_IRQ(en)		\
 	TRACE_AND_RESTORE_IRQ_PARTIAL(en,96f);	\
-	stb	en,PACASOFTIRQEN(r13);	        \
+	stb	en,PACASOFTIRQEN(r13);		\
 96:
 #else
 #define TRACE_ENABLE_INTS

arch/powerpc/include/asm/machdep.h

@@ -116,9 +116,6 @@ struct machdep_calls {
 	 * If for some reason there is no irq, but the interrupt
 	 * shouldn't be counted as spurious, return NO_IRQ_IGNORE. */
 	unsigned int	(*get_irq)(void);
-#ifdef CONFIG_KEXEC
-	void		(*kexec_cpu_down)(int crash_shutdown, int secondary);
-#endif
 
 	/* PCI stuff */
 	/* Called after scanning the bus, before allocating resources */
@@ -235,11 +232,7 @@ struct machdep_calls {
 	void (*machine_shutdown)(void);
 
 #ifdef CONFIG_KEXEC
-	/* Called to do the minimal shutdown needed to run a kexec'd kernel
-	 * to run successfully.
-	 * XXX Should we move this one out of kexec scope?
-	 */
-	void (*machine_crash_shutdown)(struct pt_regs *regs);
+	void (*kexec_cpu_down)(int crash_shutdown, int secondary);
 
 	/* Called to do what every setup is needed on image and the
 	 * reboot code buffer. Returns 0 on success.
@@ -247,15 +240,6 @@ struct machdep_calls {
 	 * claims to support kexec.
 	 */
 	int (*machine_kexec_prepare)(struct kimage *image);
-
-	/* Called to handle any machine specific cleanup on image */
-	void (*machine_kexec_cleanup)(struct kimage *image);
-
-	/* Called to perform the _real_ kexec.
-	 * Do NOT allocate memory or fail here. We are past the point of
-	 * no return.
-	 */
-	void (*machine_kexec)(struct kimage *image);
 #endif /* CONFIG_KEXEC */
 
 #ifdef CONFIG_SUSPEND

arch/powerpc/include/asm/reg.h

@@ -283,6 +283,7 @@
 #define HID0_NOPTI	(1<<0)		/* No-op dcbt and dcbst instr. */
 
 #define SPRN_HID1	0x3F1		/* Hardware Implementation Register 1 */
+#ifdef CONFIG_6xx
 #define HID1_EMCP	(1<<31)		/* 7450 Machine Check Pin Enable */
 #define HID1_DFS	(1<<22)		/* 7447A Dynamic Frequency Scaling */
 #define HID1_PC0	(1<<16)		/* 7450 PLL_CFG[0] */
@@ -292,6 +293,7 @@
 #define HID1_SYNCBE	(1<<11)		/* 7450 ABE for sync, eieio */
 #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_GEKKO	0x398		/* Gekko HID2 Register */
 #define SPRN_IABR	0x3F2	/* Instruction Address Breakpoint Register */

arch/powerpc/include/asm/reg_booke.h

@@ -246,6 +246,20 @@
 					store or cache line push */
 #endif
 
+/* Bit definitions for the HID1 */
+#ifdef CONFIG_E500
+/* e500v1/v2 */
+#define HID1_PLL_CFG_MASK 0xfc000000	/* PLL_CFG input pins */
+#define HID1_RFXE	0x00020000	/* Read fault exception enable */
+#define HID1_R1DPE	0x00008000	/* R1 data bus parity enable */
+#define HID1_R2DPE	0x00004000	/* R2 data bus parity enable */
+#define HID1_ASTME	0x00002000	/* Address bus streaming mode enable */
+#define HID1_ABE	0x00001000	/* Address broadcast enable */
+#define HID1_MPXTT	0x00000400	/* MPX re-map transfer type */
+#define HID1_ATS	0x00000080	/* Atomic status */
+#define HID1_MID_MASK	0x0000000f	/* MID input pins */
+#endif
+
 /* Bit definitions for the DBSR. */
 /*
  * DBSR bits which have conflicting definitions on true Book E versus IBM 40x.

arch/powerpc/include/asm/spu.h

@@ -203,14 +203,6 @@ void spu_irq_setaffinity(struct spu *spu, int cpu);
 void spu_setup_kernel_slbs(struct spu *spu, struct spu_lscsa *lscsa,
 		void *code, int code_size);
 
-#ifdef CONFIG_KEXEC
-void crash_register_spus(struct list_head *list);
-#else
-static inline void crash_register_spus(struct list_head *list)
-{
-}
-#endif
-
 extern void spu_invalidate_slbs(struct spu *spu);
 extern void spu_associate_mm(struct spu *spu, struct mm_struct *mm);
 int spu_64k_pages_available(void);

arch/powerpc/kernel/cpu_setup_fsl_booke.S

@@ -64,6 +64,12 @@ _GLOBAL(__setup_cpu_e500v2)
 	bl	__e500_icache_setup
 	bl	__e500_dcache_setup
 	bl	__setup_e500_ivors
+#ifdef CONFIG_RAPIDIO
+	/* Ensure that RFXE is set */
+	mfspr	r3,SPRN_HID1
+	oris	r3,r3,HID1_RFXE@h
+	mtspr	SPRN_HID1,r3
+#endif
 	mtlr	r4
 	blr
 _GLOBAL(__setup_cpu_e500mc)

arch/powerpc/kernel/cputable.c

@@ -116,7 +116,6 @@ static struct cpu_spec __initdata cpu_specs[] = {
 		.pmc_type		= PPC_PMC_IBM,
 		.oprofile_cpu_type	= "ppc64/power3",
 		.oprofile_type		= PPC_OPROFILE_RS64,
-		.machine_check		= machine_check_generic,
 		.platform		= "power3",
 	},
 	{	/* Power3+ */
@@ -132,7 +131,6 @@ static struct cpu_spec __initdata cpu_specs[] = {
 		.pmc_type		= PPC_PMC_IBM,
 		.oprofile_cpu_type	= "ppc64/power3",
 		.oprofile_type		= PPC_OPROFILE_RS64,
-		.machine_check		= machine_check_generic,
 		.platform		= "power3",
 	},
 	{	/* Northstar */
@@ -148,7 +146,6 @@ static struct cpu_spec __initdata cpu_specs[] = {
 		.pmc_type		= PPC_PMC_IBM,
 		.oprofile_cpu_type	= "ppc64/rs64",
 		.oprofile_type		= PPC_OPROFILE_RS64,
-		.machine_check		= machine_check_generic,
 		.platform		= "rs64",
 	},
 	{	/* Pulsar */
@@ -164,7 +161,6 @@ static struct cpu_spec __initdata cpu_specs[] = {
 		.pmc_type		= PPC_PMC_IBM,
 		.oprofile_cpu_type	= "ppc64/rs64",
 		.oprofile_type		= PPC_OPROFILE_RS64,
-		.machine_check		= machine_check_generic,
 		.platform		= "rs64",
 	},
 	{	/* I-star */
@@ -180,7 +176,6 @@ static struct cpu_spec __initdata cpu_specs[] = {
 		.pmc_type		= PPC_PMC_IBM,
 		.oprofile_cpu_type	= "ppc64/rs64",
 		.oprofile_type		= PPC_OPROFILE_RS64,
-		.machine_check		= machine_check_generic,
 		.platform		= "rs64",
 	},
 	{	/* S-star */
@@ -196,7 +191,6 @@ static struct cpu_spec __initdata cpu_specs[] = {
 		.pmc_type		= PPC_PMC_IBM,
 		.oprofile_cpu_type	= "ppc64/rs64",
 		.oprofile_type		= PPC_OPROFILE_RS64,
-		.machine_check		= machine_check_generic,
 		.platform		= "rs64",
 	},
 	{	/* Power4 */
@@ -212,7 +206,6 @@ static struct cpu_spec __initdata cpu_specs[] = {
 		.pmc_type		= PPC_PMC_IBM,
 		.oprofile_cpu_type	= "ppc64/power4",
 		.oprofile_type		= PPC_OPROFILE_POWER4,
-		.machine_check		= machine_check_generic,
 		.platform		= "power4",
 	},
 	{	/* Power4+ */
@@ -228,7 +221,6 @@ static struct cpu_spec __initdata cpu_specs[] = {
 		.pmc_type		= PPC_PMC_IBM,
 		.oprofile_cpu_type	= "ppc64/power4",
 		.oprofile_type		= PPC_OPROFILE_POWER4,
-		.machine_check		= machine_check_generic,
 		.platform		= "power4",
 	},
 	{	/* PPC970 */
@@ -247,7 +239,6 @@ static struct cpu_spec __initdata cpu_specs[] = {
 		.cpu_restore		= __restore_cpu_ppc970,
 		.oprofile_cpu_type	= "ppc64/970",
 		.oprofile_type		= PPC_OPROFILE_POWER4,
-		.machine_check		= machine_check_generic,
 		.platform		= "ppc970",
 	},
 	{	/* PPC970FX */
@@ -266,7 +257,6 @@ static struct cpu_spec __initdata cpu_specs[] = {
 		.cpu_restore		= __restore_cpu_ppc970,
 		.oprofile_cpu_type	= "ppc64/970",
 		.oprofile_type		= PPC_OPROFILE_POWER4,
-		.machine_check		= machine_check_generic,
 		.platform		= "ppc970",
 	},
 	{	/* PPC970MP DD1.0 - no DEEPNAP, use regular 970 init */
@@ -285,7 +275,6 @@ static struct cpu_spec __initdata cpu_specs[] = {
 		.cpu_restore		= __restore_cpu_ppc970,
 		.oprofile_cpu_type	= "ppc64/970MP",
 		.oprofile_type		= PPC_OPROFILE_POWER4,
-		.machine_check		= machine_check_generic,
 		.platform		= "ppc970",
 	},
 	{	/* PPC970MP */
@@ -304,7 +293,6 @@ static struct cpu_spec __initdata cpu_specs[] = {
 		.cpu_restore		= __restore_cpu_ppc970,
 		.oprofile_cpu_type	= "ppc64/970MP",
 		.oprofile_type		= PPC_OPROFILE_POWER4,
-		.machine_check		= machine_check_generic,
 		.platform		= "ppc970",
 	},
 	{	/* PPC970GX */
@@ -322,7 +310,6 @@ static struct cpu_spec __initdata cpu_specs[] = {
 		.cpu_setup		= __setup_cpu_ppc970,
 		.oprofile_cpu_type	= "ppc64/970",
 		.oprofile_type		= PPC_OPROFILE_POWER4,
-		.machine_check		= machine_check_generic,
 		.platform		= "ppc970",
 	},
 	{	/* Power5 GR */
@@ -343,7 +330,6 @@ static struct cpu_spec __initdata cpu_specs[] = {
 		 */
 		.oprofile_mmcra_sihv	= MMCRA_SIHV,
 		.oprofile_mmcra_sipr	= MMCRA_SIPR,
-		.machine_check		= machine_check_generic,
 		.platform		= "power5",
 	},
 	{	/* Power5++ */
@@ -360,7 +346,6 @@ static struct cpu_spec __initdata cpu_specs[] = {
 		.oprofile_type		= PPC_OPROFILE_POWER4,
 		.oprofile_mmcra_sihv	= MMCRA_SIHV,
 		.oprofile_mmcra_sipr	= MMCRA_SIPR,
-		.machine_check		= machine_check_generic,
 		.platform		= "power5+",
 	},
 	{	/* Power5 GS */
@@ -378,7 +363,6 @@ static struct cpu_spec __initdata cpu_specs[] = {
 		.oprofile_type		= PPC_OPROFILE_POWER4,
 		.oprofile_mmcra_sihv	= MMCRA_SIHV,
 		.oprofile_mmcra_sipr	= MMCRA_SIPR,
-		.machine_check		= machine_check_generic,
 		.platform		= "power5+",
 	},
 	{	/* POWER6 in P5+ mode; 2.04-compliant processor */
@@ -390,7 +374,6 @@ static struct cpu_spec __initdata cpu_specs[] = {
 		.mmu_features		= MMU_FTR_HPTE_TABLE,
 		.icache_bsize		= 128,
 		.dcache_bsize		= 128,
-		.machine_check		= machine_check_generic,
 		.oprofile_cpu_type	= "ppc64/ibm-compat-v1",
 		.oprofile_type		= PPC_OPROFILE_POWER4,
 		.platform		= "power5+",
@@ -413,7 +396,6 @@ static struct cpu_spec __initdata cpu_specs[] = {
 		.oprofile_mmcra_sipr	= POWER6_MMCRA_SIPR,
 		.oprofile_mmcra_clear	= POWER6_MMCRA_THRM |
 			POWER6_MMCRA_OTHER,
-		.machine_check		= machine_check_generic,
 		.platform		= "power6x",
 	},
 	{	/* 2.05-compliant processor, i.e. Power6 "architected" mode */
@@ -425,7 +407,6 @@ static struct cpu_spec __initdata cpu_specs[] = {
 		.mmu_features		= MMU_FTR_HPTE_TABLE,
 		.icache_bsize		= 128,
 		.dcache_bsize		= 128,
-		.machine_check		= machine_check_generic,
 		.oprofile_cpu_type	= "ppc64/ibm-compat-v1",
 		.oprofile_type		= PPC_OPROFILE_POWER4,
 		.platform		= "power6",
@@ -440,7 +421,6 @@ static struct cpu_spec __initdata cpu_specs[] = {
 			MMU_FTR_TLBIE_206,
 		.icache_bsize		= 128,
 		.dcache_bsize		= 128,
-		.machine_check		= machine_check_generic,
 		.oprofile_type		= PPC_OPROFILE_POWER4,
 		.oprofile_cpu_type	= "ppc64/ibm-compat-v1",
 		.platform		= "power7",
@@ -492,7 +472,6 @@ static struct cpu_spec __initdata cpu_specs[] = {
 		.pmc_type		= PPC_PMC_IBM,
 		.oprofile_cpu_type	= "ppc64/cell-be",
 		.oprofile_type		= PPC_OPROFILE_CELL,
-		.machine_check		= machine_check_generic,
 		.platform		= "ppc-cell-be",
 	},
 	{	/* PA Semi PA6T */
@@ -510,7 +489,6 @@ static struct cpu_spec __initdata cpu_specs[] = {
 		.cpu_restore		= __restore_cpu_pa6t,
 		.oprofile_cpu_type	= "ppc64/pa6t",
 		.oprofile_type		= PPC_OPROFILE_PA6T,
-		.machine_check		= machine_check_generic,
 		.platform		= "pa6t",
 	},
 	{	/* default match */
@@ -524,7 +502,6 @@ static struct cpu_spec __initdata cpu_specs[] = {
 		.dcache_bsize		= 128,
 		.num_pmcs		= 6,
 		.pmc_type		= PPC_PMC_IBM,
-		.machine_check		= machine_check_generic,
 		.platform		= "power4",
 	}
 #endif	/* CONFIG_PPC_BOOK3S_64 */

arch/powerpc/kernel/crash.c

@@ -48,7 +48,7 @@ int crashing_cpu = -1;
 static cpumask_t cpus_in_crash = CPU_MASK_NONE;
 cpumask_t cpus_in_sr = CPU_MASK_NONE;
 
-#define CRASH_HANDLER_MAX 2
+#define CRASH_HANDLER_MAX 3
 /* NULL terminated list of shutdown handles */
 static crash_shutdown_t crash_shutdown_handles[CRASH_HANDLER_MAX+1];
 static DEFINE_SPINLOCK(crash_handlers_lock);
@@ -125,7 +125,7 @@ static void crash_kexec_prepare_cpus(int cpu)
 	smp_wmb();
 
 	/*
-	 * FIXME: Until we will have the way to stop other CPUSs reliabally,
+	 * FIXME: Until we will have the way to stop other CPUs reliably,
 	 * the crash CPU will send an IPI and wait for other CPUs to
 	 * respond.
 	 * Delay of at least 10 seconds.
@@ -254,72 +254,6 @@ void crash_kexec_secondary(struct pt_regs *regs)
 	cpus_in_sr = CPU_MASK_NONE;
 }
 #endif
-#ifdef CONFIG_SPU_BASE
-
-#include <asm/spu.h>
-#include <asm/spu_priv1.h>
-
-struct crash_spu_info {
-	struct spu *spu;
-	u32 saved_spu_runcntl_RW;
-	u32 saved_spu_status_R;
-	u32 saved_spu_npc_RW;
-	u64 saved_mfc_sr1_RW;
-	u64 saved_mfc_dar;
-	u64 saved_mfc_dsisr;
-};
-
-#define CRASH_NUM_SPUS	16	/* Enough for current hardware */
-static struct crash_spu_info crash_spu_info[CRASH_NUM_SPUS];
-
-static void crash_kexec_stop_spus(void)
-{
-	struct spu *spu;
-	int i;
-	u64 tmp;
-
-	for (i = 0; i < CRASH_NUM_SPUS; i++) {
-		if (!crash_spu_info[i].spu)
-			continue;
-
-		spu = crash_spu_info[i].spu;
-
-		crash_spu_info[i].saved_spu_runcntl_RW =
-			in_be32(&spu->problem->spu_runcntl_RW);
-		crash_spu_info[i].saved_spu_status_R =
-			in_be32(&spu->problem->spu_status_R);
-		crash_spu_info[i].saved_spu_npc_RW =
-			in_be32(&spu->problem->spu_npc_RW);
-
-		crash_spu_info[i].saved_mfc_dar    = spu_mfc_dar_get(spu);
-		crash_spu_info[i].saved_mfc_dsisr  = spu_mfc_dsisr_get(spu);
-		tmp = spu_mfc_sr1_get(spu);
-		crash_spu_info[i].saved_mfc_sr1_RW = tmp;
-
-		tmp &= ~MFC_STATE1_MASTER_RUN_CONTROL_MASK;
-		spu_mfc_sr1_set(spu, tmp);
-
-		__delay(200);
-	}
-}
-
-void crash_register_spus(struct list_head *list)
-{
-	struct spu *spu;
-
-	list_for_each_entry(spu, list, full_list) {
-		if (WARN_ON(spu->number >= CRASH_NUM_SPUS))
-			continue;
-
-		crash_spu_info[spu->number].spu = spu;
-	}
-}
-
-#else
-static inline void crash_kexec_stop_spus(void)
-{
-}
-#endif /* CONFIG_SPU_BASE */
 
 /*
  * Register a function to be called on shutdown.  Only use this if you
@@ -439,8 +373,6 @@ void default_machine_crash_shutdown(struct pt_regs *regs)
 	crash_shutdown_cpu = -1;
 	__debugger_fault_handler = old_handler;
 
-	crash_kexec_stop_spus();
-
 	if (ppc_md.kexec_cpu_down)
 		ppc_md.kexec_cpu_down(1, 0);
 }

arch/powerpc/kernel/entry_32.S

@@ -880,7 +880,18 @@ END_MMU_FTR_SECTION_IFSET(MMU_FTR_TYPE_47x)
 	 */
 	andi.	r10,r9,MSR_EE
 	beq	1f
+	/*
+	 * Since the ftrace irqsoff latency trace checks CALLER_ADDR1,
+	 * which is the stack frame here, we need to force a stack frame
+	 * in case we came from user space.
+	 */
+	stwu	r1,-32(r1)
+	mflr	r0
+	stw	r0,4(r1)
+	stwu	r1,-32(r1)
 	bl	trace_hardirqs_on
+	lwz	r1,0(r1)
+	lwz	r1,0(r1)
 	lwz	r9,_MSR(r1)
 1:
 #endif /* CONFIG_TRACE_IRQFLAGS */

arch/powerpc/kernel/machine_kexec.c

@@ -15,6 +15,7 @@
 #include <linux/memblock.h>
 #include <linux/of.h>
 #include <linux/irq.h>
+#include <linux/ftrace.h>
 
 #include <asm/machdep.h>
 #include <asm/prom.h>
@@ -44,10 +45,7 @@ void machine_kexec_mask_interrupts(void) {
 
 void machine_crash_shutdown(struct pt_regs *regs)
 {
-	if (ppc_md.machine_crash_shutdown)
-		ppc_md.machine_crash_shutdown(regs);
-	else
-		default_machine_crash_shutdown(regs);
+	default_machine_crash_shutdown(regs);
 }
 
 /*
@@ -65,8 +63,6 @@ int machine_kexec_prepare(struct kimage *image)
 
 void machine_kexec_cleanup(struct kimage *image)
 {
-	if (ppc_md.machine_kexec_cleanup)
-		ppc_md.machine_kexec_cleanup(image);
 }
 
 void arch_crash_save_vmcoreinfo(void)
@@ -87,10 +83,13 @@ void arch_crash_save_vmcoreinfo(void)
  */
 void machine_kexec(struct kimage *image)
 {
-	if (ppc_md.machine_kexec)
-		ppc_md.machine_kexec(image);
-	else
-		default_machine_kexec(image);
+	int save_ftrace_enabled;
+
+	save_ftrace_enabled = __ftrace_enabled_save();
+
+	default_machine_kexec(image);
+
+	__ftrace_enabled_restore(save_ftrace_enabled);
 
 	/* Fall back to normal restart if we're still alive. */
 	machine_restart(NULL);

arch/powerpc/kernel/process.c

@@ -631,7 +631,7 @@ void show_regs(struct pt_regs * regs)
 #ifdef CONFIG_PPC_ADV_DEBUG_REGS
 		printk("DEAR: "REG", ESR: "REG"\n", regs->dar, regs->dsisr);
 #else
-		printk("DAR: "REG", DSISR: "REG"\n", regs->dar, regs->dsisr);
+		printk("DAR: "REG", DSISR: %08lx\n", regs->dar, regs->dsisr);
 #endif
 	printk("TASK = %p[%d] '%s' THREAD: %p",
 	       current, task_pid_nr(current), current->comm, task_thread_info(current));

arch/powerpc/kernel/rtas_flash.c

@@ -256,31 +256,16 @@ static ssize_t rtas_flash_read(struct file *file, char __user *buf,
 	struct proc_dir_entry *dp = PDE(file->f_path.dentry->d_inode);
 	struct rtas_update_flash_t *uf;
 	char msg[RTAS_MSG_MAXLEN];
-	int msglen;
 
-	uf = (struct rtas_update_flash_t *) dp->data;
+	uf = dp->data;
 
 	if (!strcmp(dp->name, FIRMWARE_FLASH_NAME)) {
 		get_flash_status_msg(uf->status, msg);
 	} else {	   /* FIRMWARE_UPDATE_NAME */
 		sprintf(msg, "%d\n", uf->status);
 	}
-	msglen = strlen(msg);
-	if (msglen > count)
-		msglen = count;
 
-	if (ppos && *ppos != 0)
-		return 0;	/* be cheap */
-
-	if (!access_ok(VERIFY_WRITE, buf, msglen))
-		return -EINVAL;
-
-	if (copy_to_user(buf, msg, msglen))
-		return -EFAULT;
-
-	if (ppos)
-		*ppos = msglen;
-	return msglen;
+	return simple_read_from_buffer(buf, count, ppos, msg, strlen(msg));
 }
 
 /* constructor for flash_block_cache */
@@ -394,26 +379,13 @@ static ssize_t manage_flash_read(struct file *file, char __user *buf,
 	char msg[RTAS_MSG_MAXLEN];
 	int msglen;
 
-	args_buf = (struct rtas_manage_flash_t *) dp->data;
+	args_buf = dp->data;
 	if (args_buf == NULL)
 		return 0;
 
 	msglen = sprintf(msg, "%d\n", args_buf->status);
-	if (msglen > count)
-		msglen = count;
 
-	if (ppos && *ppos != 0)
-		return 0;	/* be cheap */
-
-	if (!access_ok(VERIFY_WRITE, buf, msglen))
-		return -EINVAL;
-
-	if (copy_to_user(buf, msg, msglen))
-		return -EFAULT;
-
-	if (ppos)
-		*ppos = msglen;
-	return msglen;
+	return simple_read_from_buffer(buf, count, ppos, msg, msglen);
 }
 
 static ssize_t manage_flash_write(struct file *file, const char __user *buf,
@@ -495,24 +467,11 @@ static ssize_t validate_flash_read(struct file *file, char __user *buf,
 	char msg[RTAS_MSG_MAXLEN];
 	int msglen;
 
-	args_buf = (struct rtas_validate_flash_t *) dp->data;
+	args_buf = dp->data;
 
-	if (ppos && *ppos != 0)
-		return 0;	/* be cheap */
-	
 	msglen = get_validate_flash_msg(args_buf, msg);
-	if (msglen > count)
-		msglen = count;
 
-	if (!access_ok(VERIFY_WRITE, buf, msglen))
-		return -EINVAL;
-
-	if (copy_to_user(buf, msg, msglen))
-		return -EFAULT;
-
-	if (ppos)
-		*ppos = msglen;
-	return msglen;
+	return simple_read_from_buffer(buf, count, ppos, msg, msglen);
 }
 
 static ssize_t validate_flash_write(struct file *file, const char __user *buf,

arch/powerpc/kernel/rtasd.c

@@ -160,7 +160,7 @@ static int log_rtas_len(char * buf)
 	/* rtas fixed header */
 	len = 8;
 	err = (struct rtas_error_log *)buf;
-	if (err->extended_log_length) {
+	if (err->extended && err->extended_log_length) {
 
 		/* extended header */
 		len += err->extended_log_length;

arch/powerpc/kernel/time.c

@@ -265,11 +265,26 @@ void accumulate_stolen_time(void)
 {
 	u64 sst, ust;
 
-	sst = scan_dispatch_log(get_paca()->starttime_user);
-	ust = scan_dispatch_log(get_paca()->starttime);
-	get_paca()->system_time -= sst;
-	get_paca()->user_time -= ust;
-	get_paca()->stolen_time += ust + sst;
+	u8 save_soft_enabled = local_paca->soft_enabled;
+	u8 save_hard_enabled = local_paca->hard_enabled;
+
+	/* We are called early in the exception entry, before
+	 * soft/hard_enabled are sync'ed to the expected state
+	 * for the exception. We are hard disabled but the PACA
+	 * needs to reflect that so various debug stuff doesn't
+	 * complain
+	 */
+	local_paca->soft_enabled = 0;
+	local_paca->hard_enabled = 0;
+
+	sst = scan_dispatch_log(local_paca->starttime_user);
+	ust = scan_dispatch_log(local_paca->starttime);
+	local_paca->system_time -= sst;
+	local_paca->user_time -= ust;
+	local_paca->stolen_time += ust + sst;
+
+	local_paca->soft_enabled = save_soft_enabled;
+	local_paca->hard_enabled = save_hard_enabled;
 }
 
 static inline u64 calculate_stolen_time(u64 stop_tb)