Linux-libre 4.4-gnupck-4.4-gnu

22 files changed, 280 insertions, 65 deletions

diff --git a/arch/powerpc/kernel/crash.c b/arch/powerpc/kernel/crash.c
index 51dbace32..2bb252c01 100644
--- a/arch/powerpc/kernel/crash.c
+++ b/arch/powerpc/kernel/crash.c
@@ -221,8 +221,8 @@ void crash_kexec_secondary(struct pt_regs *regs)
 #endif	/* CONFIG_SMP */
 
 /* wait for all the CPUs to hit real mode but timeout if they don't come in */
-#if defined(CONFIG_SMP) && defined(CONFIG_PPC_STD_MMU_64)
-static void crash_kexec_wait_realmode(int cpu)
+#if defined(CONFIG_SMP) && defined(CONFIG_PPC64)
+static void __maybe_unused crash_kexec_wait_realmode(int cpu)
 {
 	unsigned int msecs;
 	int i;
@@ -244,7 +244,7 @@ static void crash_kexec_wait_realmode(int cpu)
 }
 #else
 static inline void crash_kexec_wait_realmode(int cpu) {}
-#endif	/* CONFIG_SMP && CONFIG_PPC_STD_MMU_64 */
+#endif	/* CONFIG_SMP && CONFIG_PPC64 */
 
 /*
  * Register a function to be called on shutdown.  Only use this if you
diff --git a/arch/powerpc/kernel/eeh.c b/arch/powerpc/kernel/eeh.c
index e968533e3..40e4d4a27 100644
--- a/arch/powerpc/kernel/eeh.c
+++ b/arch/powerpc/kernel/eeh.c
@@ -351,7 +351,8 @@ static inline unsigned long eeh_token_to_phys(unsigned long token)
 	 * worried about _PAGE_SPLITTING/collapse. Also we will not hit
 	 * page table free, because of init_mm.
 	 */
-	ptep = __find_linux_pte_or_hugepte(init_mm.pgd, token, &hugepage_shift);
+	ptep = __find_linux_pte_or_hugepte(init_mm.pgd, token,
+					   NULL, &hugepage_shift);
 	if (!ptep)
 		return token;
 	WARN_ON(hugepage_shift);
@@ -630,7 +631,7 @@ int eeh_pci_enable(struct eeh_pe *pe, int function)
 	 */
 	switch (function) {
 	case EEH_OPT_THAW_MMIO:
-		active_flag = EEH_STATE_MMIO_ACTIVE;
+		active_flag = EEH_STATE_MMIO_ACTIVE | EEH_STATE_MMIO_ENABLED;
 		break;
 	case EEH_OPT_THAW_DMA:
 		active_flag = EEH_STATE_DMA_ACTIVE;
@@ -1411,8 +1412,7 @@ void eeh_dev_release(struct pci_dev *pdev)
 		goto out;
 
 	/* Decrease PE's pass through count */
-	atomic_dec(&edev->pe->pass_dev_cnt);
-	WARN_ON(atomic_read(&edev->pe->pass_dev_cnt) < 0);
+	WARN_ON(atomic_dec_if_positive(&edev->pe->pass_dev_cnt) < 0);
 	eeh_pe_change_owner(edev->pe);
 out:
 	mutex_unlock(&eeh_dev_mutex);
diff --git a/arch/powerpc/kernel/eeh_driver.c b/arch/powerpc/kernel/eeh_driver.c
index 89eb4bc34..8d14feb40 100644
--- a/arch/powerpc/kernel/eeh_driver.c
+++ b/arch/powerpc/kernel/eeh_driver.c
@@ -416,7 +416,10 @@ static void *eeh_rmv_device(void *data, void *userdata)
 	driver = eeh_pcid_get(dev);
 	if (driver) {
 		eeh_pcid_put(dev);
-		if (driver->err_handler)
+		if (driver->err_handler &&
+		    driver->err_handler->error_detected &&
+		    driver->err_handler->slot_reset &&
+		    driver->err_handler->resume)
 			return NULL;
 	}
 
@@ -655,9 +658,17 @@ static void eeh_handle_normal_event(struct eeh_pe *pe)
 	 * to accomplish the reset.  Each child gets a report of the
 	 * status ... if any child can't handle the reset, then the entire
 	 * slot is dlpar removed and added.
+	 *
+	 * When the PHB is fenced, we have to issue a reset to recover from
+	 * the error. Override the result if necessary to have partially
+	 * hotplug for this case.
 	 */
 	pr_info("EEH: Notify device drivers to shutdown\n");
 	eeh_pe_dev_traverse(pe, eeh_report_error, &result);
+	if ((pe->type & EEH_PE_PHB) &&
+	    result != PCI_ERS_RESULT_NONE &&
+	    result != PCI_ERS_RESULT_NEED_RESET)
+		result = PCI_ERS_RESULT_NEED_RESET;
 
 	/* Get the current PCI slot state. This can take a long time,
 	 * sometimes over 300 seconds for certain systems.
diff --git a/arch/powerpc/kernel/exceptions-64e.S b/arch/powerpc/kernel/exceptions-64e.S
index f3bd5e747..488e6314f 100644
--- a/arch/powerpc/kernel/exceptions-64e.S
+++ b/arch/powerpc/kernel/exceptions-64e.S
@@ -542,8 +542,8 @@ interrupt_base_book3e:					/* fake trap */
 	EXCEPTION_STUB(0x320, ehpriv)
 	EXCEPTION_STUB(0x340, lrat_error)
 
-	.globl interrupt_end_book3e
-interrupt_end_book3e:
+	.globl __end_interrupts
+__end_interrupts:
 
 /* Critical Input Interrupt */
 	START_EXCEPTION(critical_input);
@@ -736,7 +736,7 @@ END_FTR_SECTION_IFSET(CPU_FTR_ALTIVEC)
 	beq+	1f
 
 	LOAD_REG_IMMEDIATE(r14,interrupt_base_book3e)
-	LOAD_REG_IMMEDIATE(r15,interrupt_end_book3e)
+	LOAD_REG_IMMEDIATE(r15,__end_interrupts)
 	cmpld	cr0,r10,r14
 	cmpld	cr1,r10,r15
 	blt+	cr0,1f
@@ -800,7 +800,7 @@ kernel_dbg_exc:
 	beq+	1f
 
 	LOAD_REG_IMMEDIATE(r14,interrupt_base_book3e)
-	LOAD_REG_IMMEDIATE(r15,interrupt_end_book3e)
+	LOAD_REG_IMMEDIATE(r15,__end_interrupts)
 	cmpld	cr0,r10,r14
 	cmpld	cr1,r10,r15
 	blt+	cr0,1f
@@ -1351,7 +1351,10 @@ skpinv:	addi	r6,r6,1				/* Increment */
  * r4 = MAS0 w/TLBSEL & ESEL for the temp mapping
  */
 	/* Now we branch the new virtual address mapped by this entry */
-	LOAD_REG_IMMEDIATE(r6,2f)
+	bl	1f		/* Find our address */
+1:	mflr	r6
+	addi	r6,r6,(2f - 1b)
+	tovirt(r6,r6)
 	lis	r7,MSR_KERNEL@h
 	ori	r7,r7,MSR_KERNEL@l
 	mtspr	SPRN_SRR0,r6
@@ -1583,9 +1586,11 @@ _GLOBAL(book3e_secondary_thread_init)
 	mflr	r28
 	b	3b
 
+	.globl init_core_book3e
 init_core_book3e:
 	/* Establish the interrupt vector base */
-	LOAD_REG_IMMEDIATE(r3, interrupt_base_book3e)
+	tovirt(r2,r2)
+	LOAD_REG_ADDR(r3, interrupt_base_book3e)
 	mtspr	SPRN_IVPR,r3
 	sync
 	blr
diff --git a/arch/powerpc/kernel/head_64.S b/arch/powerpc/kernel/head_64.S
index d48125d0c..1b7795607 100644
--- a/arch/powerpc/kernel/head_64.S
+++ b/arch/powerpc/kernel/head_64.S
@@ -182,6 +182,8 @@ exception_marker:
 
 #ifdef CONFIG_PPC_BOOK3E
 _GLOBAL(fsl_secondary_thread_init)
+	mfspr	r4,SPRN_BUCSR
+
 	/* Enable branch prediction */
 	lis     r3,BUCSR_INIT@h
 	ori     r3,r3,BUCSR_INIT@l
@@ -196,10 +198,24 @@ _GLOBAL(fsl_secondary_thread_init)
 	 * number.  There are two threads per core, so shift everything
 	 * but the low bit right by two bits so that the cpu numbering is
 	 * continuous.
+	 *
+	 * If the old value of BUCSR is non-zero, this thread has run
+	 * before.  Thus, we assume we are coming from kexec or a similar
+	 * scenario, and PIR is already set to the correct value.  This
+	 * is a bit of a hack, but there are limited opportunities for
+	 * getting information into the thread and the alternatives
+	 * seemed like they'd be overkill.  We can't tell just by looking
+	 * at the old PIR value which state it's in, since the same value
+	 * could be valid for one thread out of reset and for a different
+	 * thread in Linux.
 	 */
+
 	mfspr	r3, SPRN_PIR
+	cmpwi	r4,0
+	bne	1f
 	rlwimi	r3, r3, 30, 2, 30
 	mtspr	SPRN_PIR, r3
+1:
 #endif
 
 _GLOBAL(generic_secondary_thread_init)
@@ -441,12 +457,22 @@ __after_prom_start:
 	/* process relocations for the final address of the kernel */
 	lis	r25,PAGE_OFFSET@highest	/* compute virtual base of kernel */
 	sldi	r25,r25,32
+#if defined(CONFIG_PPC_BOOK3E)
+	tovirt(r26,r26)		/* on booke, we already run at PAGE_OFFSET */
+#endif
 	lwz	r7,__run_at_load-_stext(r26)
+#if defined(CONFIG_PPC_BOOK3E)
+	tophys(r26,r26)
+#endif
 	cmplwi	cr0,r7,1	/* flagged to stay where we are ? */
 	bne	1f
 	add	r25,r25,r26
 1:	mr	r3,r25
 	bl	relocate
+#if defined(CONFIG_PPC_BOOK3E)
+	/* IVPR needs to be set after relocation. */
+	bl	init_core_book3e
+#endif
 #endif
 
 /*
@@ -458,15 +484,15 @@ __after_prom_start:
  */
 	li	r3,0			/* target addr */
 #ifdef CONFIG_PPC_BOOK3E
-	tovirt(r3,r3)			/* on booke, we already run at PAGE_OFFSET */
+	tovirt(r3,r3)		/* on booke, we already run at PAGE_OFFSET */
 #endif
 	mr.	r4,r26			/* In some cases the loader may  */
+#if defined(CONFIG_PPC_BOOK3E)
+	tovirt(r4,r4)
+#endif
 	beq	9f			/* have already put us at zero */
 	li	r6,0x100		/* Start offset, the first 0x100 */
 					/* bytes were copied earlier.	 */
-#ifdef CONFIG_PPC_BOOK3E
-	tovirt(r6,r6)			/* on booke, we already run at PAGE_OFFSET */
-#endif
 
 #ifdef CONFIG_RELOCATABLE
 /*
@@ -474,12 +500,21 @@ __after_prom_start:
  * variable __run_at_load, if it is set the kernel is treated as relocatable
  * kernel, otherwise it will be moved to PHYSICAL_START
  */
+#if defined(CONFIG_PPC_BOOK3E)
+	tovirt(r26,r26)		/* on booke, we already run at PAGE_OFFSET */
+#endif
 	lwz	r7,__run_at_load-_stext(r26)
 	cmplwi	cr0,r7,1
 	bne	3f
 
+#ifdef CONFIG_PPC_BOOK3E
+	LOAD_REG_ADDR(r5, __end_interrupts)
+	LOAD_REG_ADDR(r11, _stext)
+	sub	r5,r5,r11
+#else
 	/* just copy interrupts */
 	LOAD_REG_IMMEDIATE(r5, __end_interrupts - _stext)
+#endif
 	b	5f
 3:
 #endif
diff --git a/arch/powerpc/kernel/io-workarounds.c b/arch/powerpc/kernel/io-workarounds.c
index 63d9cc4d7..5f8613ceb 100644
--- a/arch/powerpc/kernel/io-workarounds.c
+++ b/arch/powerpc/kernel/io-workarounds.c
@@ -76,7 +76,7 @@ struct iowa_bus *iowa_mem_find_bus(const PCI_IO_ADDR addr)
 		 * a page table free due to init_mm
 		 */
 		ptep = __find_linux_pte_or_hugepte(init_mm.pgd, vaddr,
-						 &hugepage_shift);
+						   NULL, &hugepage_shift);
 		if (ptep == NULL)
 			paddr = 0;
 		else {
diff --git a/arch/powerpc/kernel/machine_kexec_64.c b/arch/powerpc/kernel/machine_kexec_64.c
index 1a74446fd..0fbd75d18 100644
--- a/arch/powerpc/kernel/machine_kexec_64.c
+++ b/arch/powerpc/kernel/machine_kexec_64.c
@@ -30,6 +30,21 @@
 #include <asm/smp.h>
 #include <asm/hw_breakpoint.h>
 
+#ifdef CONFIG_PPC_BOOK3E
+int default_machine_kexec_prepare(struct kimage *image)
+{
+	int i;
+	/*
+	 * Since we use the kernel fault handlers and paging code to
+	 * handle the virtual mode, we must make sure no destination
+	 * overlaps kernel static data or bss.
+	 */
+	for (i = 0; i < image->nr_segments; i++)
+		if (image->segment[i].mem < __pa(_end))
+			return -ETXTBSY;
+	return 0;
+}
+#else
 int default_machine_kexec_prepare(struct kimage *image)
 {
 	int i;
@@ -95,6 +110,7 @@ int default_machine_kexec_prepare(struct kimage *image)
 
 	return 0;
 }
+#endif /* !CONFIG_PPC_BOOK3E */
 
 static void copy_segments(unsigned long ind)
 {
@@ -365,6 +381,7 @@ void default_machine_kexec(struct kimage *image)
 	/* NOTREACHED */
 }
 
+#ifndef CONFIG_PPC_BOOK3E
 /* Values we need to export to the second kernel via the device tree. */
 static unsigned long htab_base;
 static unsigned long htab_size;
@@ -411,3 +428,4 @@ static int __init export_htab_values(void)
 	return 0;
 }
 late_initcall(export_htab_values);
+#endif /* !CONFIG_PPC_BOOK3E */
diff --git a/arch/powerpc/kernel/misc_64.S b/arch/powerpc/kernel/misc_64.S
index 6e4168cf4..db475d41b 100644
--- a/arch/powerpc/kernel/misc_64.S
+++ b/arch/powerpc/kernel/misc_64.S
@@ -26,6 +26,7 @@
 #include <asm/thread_info.h>
 #include <asm/kexec.h>
 #include <asm/ptrace.h>
+#include <asm/mmu.h>
 
 	.text
 
@@ -484,6 +485,8 @@ _GLOBAL(kexec_wait)
 	mtsrr1	r11
 	rfid
 #else
+	/* Create TLB entry in book3e_secondary_core_init */
+	li	r4,0
 	ba	0x60
 #endif
 #endif
@@ -496,6 +499,51 @@ kexec_flag:
 
 
 #ifdef CONFIG_KEXEC
+#ifdef CONFIG_PPC_BOOK3E
+/*
+ * BOOK3E has no real MMU mode, so we have to setup the initial TLB
+ * for a core to identity map v:0 to p:0.  This current implementation
+ * assumes that 1G is enough for kexec.
+ */
+kexec_create_tlb:
+	/*
+	 * Invalidate all non-IPROT TLB entries to avoid any TLB conflict.
+	 * IPROT TLB entries should be >= PAGE_OFFSET and thus not conflict.
+	 */
+	PPC_TLBILX_ALL(0,R0)
+	sync
+	isync
+
+	mfspr	r10,SPRN_TLB1CFG
+	andi.	r10,r10,TLBnCFG_N_ENTRY	/* Extract # entries */
+	subi	r10,r10,1	/* Last entry: no conflict with kernel text */
+	lis	r9,MAS0_TLBSEL(1)@h
+	rlwimi	r9,r10,16,4,15		/* Setup MAS0 = TLBSEL | ESEL(r9) */
+
+/* Set up a temp identity mapping v:0 to p:0 and return to it. */
+#if defined(CONFIG_SMP) || defined(CONFIG_PPC_E500MC)
+#define M_IF_NEEDED	MAS2_M
+#else
+#define M_IF_NEEDED	0
+#endif
+	mtspr	SPRN_MAS0,r9
+
+	lis	r9,(MAS1_VALID|MAS1_IPROT)@h
+	ori	r9,r9,(MAS1_TSIZE(BOOK3E_PAGESZ_1GB))@l
+	mtspr	SPRN_MAS1,r9
+
+	LOAD_REG_IMMEDIATE(r9, 0x0 | M_IF_NEEDED)
+	mtspr	SPRN_MAS2,r9
+
+	LOAD_REG_IMMEDIATE(r9, 0x0 | MAS3_SR | MAS3_SW | MAS3_SX)
+	mtspr	SPRN_MAS3,r9
+	li	r9,0
+	mtspr	SPRN_MAS7,r9
+
+	tlbwe
+	isync
+	blr
+#endif
 
 /* kexec_smp_wait(void)
  *
@@ -525,6 +573,10 @@ _GLOBAL(kexec_smp_wait)
  * don't overwrite r3 here, it is live for kexec_wait above.
  */
 real_mode:	/* assume normal blr return */
+#ifdef CONFIG_PPC_BOOK3E
+	/* Create an identity mapping. */
+	b	kexec_create_tlb
+#else
 1:	li	r9,MSR_RI
 	li	r10,MSR_DR|MSR_IR
 	mflr	r11		/* return address to SRR0 */
@@ -536,7 +588,7 @@ real_mode:	/* assume normal blr return */
 	mtspr	SPRN_SRR1,r10
 	mtspr	SPRN_SRR0,r11
 	rfid
-
+#endif
 
 /*
  * kexec_sequence(newstack, start, image, control, clear_all())
@@ -579,9 +631,13 @@ _GLOBAL(kexec_sequence)
 	lhz	r25,PACAHWCPUID(r13)	/* get our phys cpu from paca */
 
 	/* disable interrupts, we are overwriting kernel data next */
+#ifdef CONFIG_PPC_BOOK3E
+	wrteei	0
+#else
 	mfmsr	r3
 	rlwinm	r3,r3,0,17,15
 	mtmsrd	r3,1
+#endif
 
 	/* copy dest pages, flush whole dest image */
 	mr	r3,r29
@@ -603,6 +659,7 @@ _GLOBAL(kexec_sequence)
 	li	r6,1
 	stw	r6,kexec_flag-1b(5)
 
+#ifndef CONFIG_PPC_BOOK3E
 	/* clear out hardware hash page table and tlb */
 #if !defined(_CALL_ELF) || _CALL_ELF != 2
 	ld	r12,0(r27)		/* deref function descriptor */
@@ -611,6 +668,7 @@ _GLOBAL(kexec_sequence)
 #endif
 	mtctr	r12
 	bctrl				/* ppc_md.hpte_clear_all(void); */
+#endif /* !CONFIG_PPC_BOOK3E */
 
 /*
  *   kexec image calling is:
diff --git a/arch/powerpc/kernel/nvram_64.c b/arch/powerpc/kernel/nvram_64.c
index 98ba106a5..32e26526f 100644
--- a/arch/powerpc/kernel/nvram_64.c
+++ b/arch/powerpc/kernel/nvram_64.c
@@ -1065,7 +1065,7 @@ loff_t __init nvram_create_partition(const char *name, int sig,
 	/* Create our OS partition */
 	new_part = kmalloc(sizeof(*new_part), GFP_KERNEL);
 	if (!new_part) {
-		pr_err("nvram_create_os_partition: kmalloc failed\n");
+		pr_err("%s: kmalloc failed\n", __func__);
 		return -ENOMEM;
 	}
 
@@ -1077,8 +1077,8 @@ loff_t __init nvram_create_partition(const char *name, int sig,
 
 	rc = nvram_write_header(new_part);
 	if (rc <= 0) {
-		pr_err("nvram_create_os_partition: nvram_write_header "
-		       "failed (%d)\n", rc);
+		pr_err("%s: nvram_write_header failed (%d)\n", __func__, rc);
+		kfree(new_part);
 		return rc;
 	}
 	list_add_tail(&new_part->partition, &free_part->partition);
@@ -1090,8 +1090,8 @@ loff_t __init nvram_create_partition(const char *name, int sig,
 		free_part->header.checksum = nvram_checksum(&free_part->header);
 		rc = nvram_write_header(free_part);
 		if (rc <= 0) {
-			pr_err("nvram_create_os_partition: nvram_write_header "
-			       "failed (%d)\n", rc);
+			pr_err("%s: nvram_write_header failed (%d)\n",
+			       __func__, rc);
 			return rc;
 		}
 	} else {
@@ -1105,11 +1105,12 @@ loff_t __init nvram_create_partition(const char *name, int sig,
 	     tmp_index += NVRAM_BLOCK_LEN) {
 		rc = ppc_md.nvram_write(nv_init_vals, NVRAM_BLOCK_LEN, &tmp_index);
 		if (rc <= 0) {
-			pr_err("nvram_create_partition: nvram_write failed (%d)\n", rc);
+			pr_err("%s: nvram_write failed (%d)\n",
+			       __func__, rc);
 			return rc;
 		}
 	}
-	
+
 	return new_part->index + NVRAM_HEADER_LEN;
 }
 
diff --git a/arch/powerpc/kernel/paca.c b/arch/powerpc/kernel/paca.c
index 5a23b69f8..01ea0edf0 100644
--- a/arch/powerpc/kernel/paca.c
+++ b/arch/powerpc/kernel/paca.c
@@ -204,14 +204,19 @@ static int __initdata paca_size;
 
 void __init allocate_pacas(void)
 {
-	int cpu, limit;
+	u64 limit;
+	int cpu;
 
+	limit = ppc64_rma_size;
+
+#ifdef CONFIG_PPC_BOOK3S_64
 	/*
 	 * We can't take SLB misses on the paca, and we want to access them
 	 * in real mode, so allocate them within the RMA and also within
 	 * the first segment.
 	 */
-	limit = min(0x10000000ULL, ppc64_rma_size);
+	limit = min(0x10000000ULL, limit);
+#endif
 
 	paca_size = PAGE_ALIGN(sizeof(struct paca_struct) * nr_cpu_ids);
 
diff --git a/arch/powerpc/kernel/pci-common.c b/arch/powerpc/kernel/pci-common.c
index 7587b2ae5..0f7a60f1e 100644
--- a/arch/powerpc/kernel/pci-common.c
+++ b/arch/powerpc/kernel/pci-common.c
@@ -100,6 +100,7 @@ void pcibios_free_controller(struct pci_controller *phb)
 	if (phb->is_dynamic)
 		kfree(phb);
 }
+EXPORT_SYMBOL_GPL(pcibios_free_controller);
 
 /*
  * The function is used to return the minimal alignment
diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c
index 75b6676c1..646bf4d22 100644
--- a/arch/powerpc/kernel/process.c
+++ b/arch/powerpc/kernel/process.c
@@ -551,6 +551,24 @@ static void tm_reclaim_thread(struct thread_struct *thr,
 		msr_diff &= MSR_FP | MSR_VEC | MSR_VSX | MSR_FE0 | MSR_FE1;
 	}
 
+	/*
+	 * Use the current MSR TM suspended bit to track if we have
+	 * checkpointed state outstanding.
+	 * On signal delivery, we'd normally reclaim the checkpointed
+	 * state to obtain stack pointer (see:get_tm_stackpointer()).
+	 * This will then directly return to userspace without going
+	 * through __switch_to(). However, if the stack frame is bad,
+	 * we need to exit this thread which calls __switch_to() which
+	 * will again attempt to reclaim the already saved tm state.
+	 * Hence we need to check that we've not already reclaimed
+	 * this state.
+	 * We do this using the current MSR, rather tracking it in
+	 * some specific thread_struct bit, as it has the additional
+	 * benifit of checking for a potential TM bad thing exception.
+	 */
+	if (!MSR_TM_SUSPENDED(mfmsr()))
+		return;
+
 	tm_reclaim(thr, thr->regs->msr, cause);
 
 	/* Having done the reclaim, we now have the checkpointed
diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c
index bef76c503..7030b0359 100644
--- a/arch/powerpc/kernel/prom.c
+++ b/arch/powerpc/kernel/prom.c
@@ -783,17 +783,19 @@ void __init early_get_first_memblock_info(void *params, phys_addr_t *size)
 int of_get_ibm_chip_id(struct device_node *np)
 {
 	of_node_get(np);
-	while(np) {
-		struct device_node *old = np;
-		const __be32 *prop;
+	while (np) {
+		u32 chip_id;
 
-		prop = of_get_property(np, "ibm,chip-id", NULL);
-		if (prop) {
+		/*
+		 * Skiboot may produce memory nodes that contain more than one
+		 * cell in chip-id, we only read the first one here.
+		 */
+		if (!of_property_read_u32(np, "ibm,chip-id", &chip_id)) {
 			of_node_put(np);
-			return be32_to_cpup(prop);
+			return chip_id;
 		}
-		np = of_get_parent(np);
-		of_node_put(old);
+
+		np = of_get_next_parent(np);
 	}
 	return -1;
 }
diff --git a/arch/powerpc/kernel/prom_init.c b/arch/powerpc/kernel/prom_init.c
index 15099c416..92dea8df6 100644
--- a/arch/powerpc/kernel/prom_init.c
+++ b/arch/powerpc/kernel/prom_init.c
@@ -1425,27 +1425,45 @@ static void __init prom_instantiate_sml(void)
 {
 	phandle ibmvtpm_node;
 	ihandle ibmvtpm_inst;
-	u32 entry = 0, size = 0;
+	u32 entry = 0, size = 0, succ = 0;
 	u64 base;
+	__be32 val;
 
 	prom_debug("prom_instantiate_sml: start...\n");
 
-	ibmvtpm_node = call_prom("finddevice", 1, 1, ADDR("/ibm,vtpm"));
+	ibmvtpm_node = call_prom("finddevice", 1, 1, ADDR("/vdevice/vtpm"));
 	prom_debug("ibmvtpm_node: %x\n", ibmvtpm_node);
 	if (!PHANDLE_VALID(ibmvtpm_node))
 		return;
 
-	ibmvtpm_inst = call_prom("open", 1, 1, ADDR("/ibm,vtpm"));
+	ibmvtpm_inst = call_prom("open", 1, 1, ADDR("/vdevice/vtpm"));
 	if (!IHANDLE_VALID(ibmvtpm_inst)) {
 		prom_printf("opening vtpm package failed (%x)\n", ibmvtpm_inst);
 		return;
 	}
 
-	if (call_prom_ret("call-method", 2, 2, &size,
-			  ADDR("sml-get-handover-size"),
-			  ibmvtpm_inst) != 0 || size == 0) {
-		prom_printf("SML get handover size failed\n");
-		return;
+	if (prom_getprop(ibmvtpm_node, "ibm,sml-efi-reformat-supported",
+			 &val, sizeof(val)) != PROM_ERROR) {
+		if (call_prom_ret("call-method", 2, 2, &succ,
+				  ADDR("reformat-sml-to-efi-alignment"),
+				  ibmvtpm_inst) != 0 || succ == 0) {
+			prom_printf("Reformat SML to EFI alignment failed\n");
+			return;
+		}
+
+		if (call_prom_ret("call-method", 2, 2, &size,
+				  ADDR("sml-get-allocated-size"),
+				  ibmvtpm_inst) != 0 || size == 0) {
+			prom_printf("SML get allocated size failed\n");
+			return;
+		}
+	} else {
+		if (call_prom_ret("call-method", 2, 2, &size,
+				  ADDR("sml-get-handover-size"),
+				  ibmvtpm_inst) != 0 || size == 0) {
+			prom_printf("SML get handover size failed\n");
+			return;
+		}
 	}
 
 	base = alloc_down(size, PAGE_SIZE, 0);
@@ -1454,6 +1472,8 @@ static void __init prom_instantiate_sml(void)
 
 	prom_printf("instantiating sml at 0x%x...", base);
 
+	memset((void *)base, 0, size);
+
 	if (call_prom_ret("call-method", 4, 2, &entry,
 			  ADDR("sml-handover"),
 			  ibmvtpm_inst, size, base) != 0 || entry == 0) {
@@ -1464,9 +1484,9 @@ static void __init prom_instantiate_sml(void)
 
 	reserve_mem(base, size);
 
-	prom_setprop(ibmvtpm_node, "/ibm,vtpm", "linux,sml-base",
+	prom_setprop(ibmvtpm_node, "/vdevice/vtpm", "linux,sml-base",
 		     &base, sizeof(base));
-	prom_setprop(ibmvtpm_node, "/ibm,vtpm", "linux,sml-size",
+	prom_setprop(ibmvtpm_node, "/vdevice/vtpm", "linux,sml-size",
 		     &size, sizeof(size));
 
 	prom_debug("sml base     = 0x%x\n", base);
diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c
index bdcbb716f..5c03a6a9b 100644
--- a/arch/powerpc/kernel/setup_64.c
+++ b/arch/powerpc/kernel/setup_64.c
@@ -108,6 +108,14 @@ static void setup_tlb_core_data(void)
 	for_each_possible_cpu(cpu) {
 		int first = cpu_first_thread_sibling(cpu);
 
+		/*
+		 * If we boot via kdump on a non-primary thread,
+		 * make sure we point at the thread that actually
+		 * set up this TLB.
+		 */
+		if (cpu_first_thread_sibling(boot_cpuid) == first)
+			first = boot_cpuid;
+
 		paca[cpu].tcd_ptr = &paca[first].tcd;
 
 		/*
@@ -332,11 +340,26 @@ void early_setup_secondary(void)
 #endif /* CONFIG_SMP */
 
 #if defined(CONFIG_SMP) || defined(CONFIG_KEXEC)
+static bool use_spinloop(void)
+{
+	if (!IS_ENABLED(CONFIG_PPC_BOOK3E))
+		return true;
+
+	/*
+	 * When book3e boots from kexec, the ePAPR spin table does
+	 * not get used.
+	 */
+	return of_property_read_bool(of_chosen, "linux,booted-from-kexec");
+}
+
 void smp_release_cpus(void)
 {
 	unsigned long *ptr;
 	int i;
 
+	if (!use_spinloop())
+		return;
+
 	DBG(" -> smp_release_cpus()\n");
 
 	/* All secondary cpus are spinning on a common spinloop, release them
@@ -516,7 +539,7 @@ void __init setup_system(void)
 	 * Freescale Book3e parts spin in a loop provided by firmware,
 	 * so smp_release_cpus() does nothing for them
 	 */
-#if defined(CONFIG_SMP) && !defined(CONFIG_PPC_FSL_BOOK3E)
+#if defined(CONFIG_SMP)
 	/* Release secondary cpus out of their spinloops at 0x60 now that
 	 * we can map physical -> logical CPU ids
 	 */
diff --git a/arch/powerpc/kernel/signal_32.c b/arch/powerpc/kernel/signal_32.c
index 0dbee465a..ef7c24e84 100644
--- a/arch/powerpc/kernel/signal_32.c
+++ b/arch/powerpc/kernel/signal_32.c
@@ -875,6 +875,15 @@ static long restore_tm_user_regs(struct pt_regs *regs,
 		return 1;
 #endif /* CONFIG_SPE */
 
+	/* Get the top half of the MSR from the user context */
+	if (__get_user(msr_hi, &tm_sr->mc_gregs[PT_MSR]))
+		return 1;
+	msr_hi <<= 32;
+	/* If TM bits are set to the reserved value, it's an invalid context */
+	if (MSR_TM_RESV(msr_hi))
+		return 1;
+	/* Pull in the MSR TM bits from the user context */
+	regs->msr = (regs->msr & ~MSR_TS_MASK) | (msr_hi & MSR_TS_MASK);
 	/* Now, recheckpoint.  This loads up all of the checkpointed (older)
 	 * registers, including FP and V[S]Rs.  After recheckpointing, the
 	 * transactional versions should be loaded.
@@ -884,11 +893,6 @@ static long restore_tm_user_regs(struct pt_regs *regs,
 	current->thread.tm_texasr |= TEXASR_FS;
 	/* This loads the checkpointed FP/VEC state, if used */
 	tm_recheckpoint(&current->thread, msr);
-	/* Get the top half of the MSR */
-	if (__get_user(msr_hi, &tm_sr->mc_gregs[PT_MSR]))
-		return 1;
-	/* Pull in MSR TM from user context */
-	regs->msr = (regs->msr & ~MSR_TS_MASK) | ((msr_hi<<32) & MSR_TS_MASK);
 
 	/* This loads the speculative FP/VEC state, if used */
 	if (msr & MSR_FP) {
diff --git a/arch/powerpc/kernel/signal_64.c b/arch/powerpc/kernel/signal_64.c
index 20756dfb9..c676ecec0 100644
--- a/arch/powerpc/kernel/signal_64.c
+++ b/arch/powerpc/kernel/signal_64.c
@@ -438,6 +438,10 @@ static long restore_tm_sigcontexts(struct pt_regs *regs,
 
 	/* get MSR separately, transfer the LE bit if doing signal return */
 	err |= __get_user(msr, &sc->gp_regs[PT_MSR]);
+	/* Don't allow reserved mode. */
+	if (MSR_TM_RESV(msr))
+		return -EINVAL;
+
 	/* pull in MSR TM from user context */
 	regs->msr = (regs->msr & ~MSR_TS_MASK) | (msr & MSR_TS_MASK);
 
diff --git a/arch/powerpc/kernel/vdso32/Makefile b/arch/powerpc/kernel/vdso32/Makefile
index 53e6c9b97..6abffb7a8 100644
--- a/arch/powerpc/kernel/vdso32/Makefile
+++ b/arch/powerpc/kernel/vdso32/Makefile
@@ -18,7 +18,7 @@ GCOV_PROFILE := n
 
 ccflags-y := -shared -fno-common -fno-builtin
 ccflags-y += -nostdlib -Wl,-soname=linux-vdso32.so.1 \
-		$(call cc-ldoption, -Wl$(comma)--hash-style=sysv)
+		$(call cc-ldoption, -Wl$(comma)--hash-style=both)
 asflags-y := -D__VDSO32__ -s
 
 obj-y += vdso32_wrapper.o
diff --git a/arch/powerpc/kernel/vdso32/datapage.S b/arch/powerpc/kernel/vdso32/datapage.S
index dc21e891d..59cf5f452 100644
--- a/arch/powerpc/kernel/vdso32/datapage.S
+++ b/arch/powerpc/kernel/vdso32/datapage.S
@@ -16,6 +16,10 @@
 #include <asm/vdso.h>
 
 	.text
+	.global	__kernel_datapage_offset;
+__kernel_datapage_offset:
+	.long	0
+
 V_FUNCTION_BEGIN(__get_datapage)
   .cfi_startproc
 	/* We don't want that exposed or overridable as we want other objects
@@ -27,13 +31,11 @@ V_FUNCTION_BEGIN(__get_datapage)
 	mflr	r0
   .cfi_register lr,r0
 
-	bcl	20,31,1f
-	.global	__kernel_datapage_offset;
-__kernel_datapage_offset:
-	.long	0
-1:
+	bcl	20,31,data_page_branch
+data_page_branch:
 	mflr	r3
 	mtlr	r0
+	addi	r3, r3, __kernel_datapage_offset-data_page_branch
 	lwz	r0,0(r3)
 	add	r3,r0,r3
 	blr
diff --git a/arch/powerpc/kernel/vdso64/Makefile b/arch/powerpc/kernel/vdso64/Makefile
index effca9404..8c8f2ae43 100644
--- a/arch/powerpc/kernel/vdso64/Makefile
+++ b/arch/powerpc/kernel/vdso64/Makefile
@@ -11,7 +11,7 @@ GCOV_PROFILE := n
 
 ccflags-y := -shared -fno-common -fno-builtin
 ccflags-y += -nostdlib -Wl,-soname=linux-vdso64.so.1 \
-		$(call cc-ldoption, -Wl$(comma)--hash-style=sysv)
+		$(call cc-ldoption, -Wl$(comma)--hash-style=both)
 asflags-y := -D__VDSO64__ -s
 
 obj-y += vdso64_wrapper.o
diff --git a/arch/powerpc/kernel/vdso64/datapage.S b/arch/powerpc/kernel/vdso64/datapage.S
index 79796de11..2f01c4a0d 100644
--- a/arch/powerpc/kernel/vdso64/datapage.S
+++ b/arch/powerpc/kernel/vdso64/datapage.S
@@ -16,6 +16,10 @@
 #include <asm/vdso.h>
 
 	.text
+.global	__kernel_datapage_offset;
+__kernel_datapage_offset:
+	.long	0
+
 V_FUNCTION_BEGIN(__get_datapage)
   .cfi_startproc
 	/* We don't want that exposed or overridable as we want other objects
@@ -27,13 +31,11 @@ V_FUNCTION_BEGIN(__get_datapage)
 	mflr	r0
   .cfi_register lr,r0
 
-	bcl	20,31,1f
-	.global	__kernel_datapage_offset;
-__kernel_datapage_offset:
-	.long	0
-1:
+	bcl	20,31,data_page_branch
+data_page_branch:
 	mflr	r3
 	mtlr	r0
+	addi	r3, r3, __kernel_datapage_offset-data_page_branch
 	lwz	r0,0(r3)
 	add	r3,r0,r3
 	blr
diff --git a/arch/powerpc/kernel/vmlinux.lds.S b/arch/powerpc/kernel/vmlinux.lds.S
index 1db685104..d41fd0af8 100644
--- a/arch/powerpc/kernel/vmlinux.lds.S
+++ b/arch/powerpc/kernel/vmlinux.lds.S
@@ -183,6 +183,12 @@ SECTIONS
 		*(.rela*)
 	}
 #endif
+	/* .exit.data is discarded at runtime, not link time,
+	 * to deal with references from .exit.text
+	 */
+	.exit.data : AT(ADDR(.exit.data) - LOAD_OFFSET) {
+		EXIT_DATA
+	}
 
 	/* freed after init ends here */
 	. = ALIGN(PAGE_SIZE);