Merge tag 'powerpc-4.4-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

Pull powerpc updates from Michael Ellerman:

 - Kconfig: remove BE-only platforms from LE kernel build from Boqun
   Feng
 - Refresh ps3_defconfig from Geoff Levand
 - Emit GNU & SysV hashes for the vdso from Michael Ellerman
 - Define an enum for the bolted SLB indexes from Anshuman Khandual
 - Use a local to avoid multiple calls to get_slb_shadow() from Michael
   Ellerman
 - Add gettimeofday() benchmark from Michael Neuling
 - Avoid link stack corruption in __get_datapage() from Michael Neuling
 - Add virt_to_pfn and use this instead of opencoding from Aneesh Kumar
   K.V
 - Add ppc64le_defconfig from Michael Ellerman
 - pseries: extract of_helpers module from Andy Shevchenko
 - Correct string length in pseries_of_derive_parent() from Nathan
   Fontenot
 - Free the MSI bitmap if it was slab allocated from Denis Kirjanov
 - Shorten irq_chip name for the SIU from Christophe Leroy
 - Wait 1s for secondaries to enter OPAL during kexec from Samuel
   Mendoza-Jonas
 - Fix _ALIGN_* errors due to type difference, from Aneesh Kumar K.V
 - powerpc/pseries/hvcserver: don't memset pi_buff if it is null from
   Colin Ian King
 - Disable hugepd for 64K page size, from Aneesh Kumar K.V
 - Differentiate between hugetlb and THP during page walk from Aneesh
   Kumar K.V
 - Make PCI non-optional for pseries from Michael Ellerman
 - Individual System V IPC system calls from Sam bobroff
 - Add selftest of unmuxed IPC calls from Michael Ellerman
 - discard .exit.data at runtime from Stephen Rothwell
 - Delete old orphaned PrPMC 280/2800 DTS and boot file, from Paul
   Gortmaker
 - Use of_get_next_parent to simplify code from Christophe Jaillet
 - Paginate some xmon output from Sam bobroff
 - Add some more elements to the xmon PACA dump from Michael Ellerman
 - Allow the tm-syscall selftest to build with old headers from Michael
   Ellerman
 - Run EBB selftests only on POWER8 from Denis Kirjanov
 - Drop CONFIG_TUNE_CELL in favour of CONFIG_CELL_CPU from Michael
   Ellerman
 - Avoid reference to potentially freed memory in prom.c from Christophe
   Jaillet
 - Quieten boot wrapper output with run_cmd from Geoff Levand
 - EEH fixes and cleanups from Gavin Shan
 - Fix recursive fenced PHB on Broadcom shiner adapter from Gavin Shan
 - Use of_get_next_parent() in of_get_ibm_chip_id() from Michael
   Ellerman
 - Fix section mismatch warning in msi_bitmap_alloc() from Denis
   Kirjanov
 - Fix ps3-lpm white space from Rudhresh Kumar J
 - Fix ps3-vuart null dereference from Colin King
 - nvram: Add missing kfree in error path from Christophe Jaillet
 - nvram: Fix function name in some errors messages, from Christophe
   Jaillet
 - drivers/macintosh: adb: fix misleading Kconfig help text from Aaro
   Koskinen
 - agp/uninorth: fix a memleak in create_gatt_table from Denis Kirjanov
 - cxl: Free virtual PHB when removing from Andrew Donnellan
 - scripts/kconfig/Makefile: Allow KBUILD_DEFCONFIG to be a target from
   Michael Ellerman
 - scripts/kconfig/Makefile: Fix KBUILD_DEFCONFIG check when building
   with O= from Michael Ellerman
 - Freescale updates from Scott: Highlights include 64-bit book3e
   kexec/kdump support, a rework of the qoriq clock driver, device tree
   changes including qoriq fman nodes, support for a new 85xx board, and
   some fixes.
 - MPC5xxx updates from Anatolij: Highlights include a driver for
   MPC512x LocalPlus Bus FIFO with its device tree binding
   documentation, mpc512x device tree updates and some minor fixes.

* tag 'powerpc-4.4-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (106 commits)
  powerpc/msi: Fix section mismatch warning in msi_bitmap_alloc()
  powerpc/prom: Use of_get_next_parent() in of_get_ibm_chip_id()
  powerpc/pseries: Correct string length in pseries_of_derive_parent()
  powerpc/e6500: hw tablewalk: make sure we invalidate and write to the same tlb entry
  powerpc/mpc85xx: Add FSL QorIQ DPAA FMan support to the SoC device tree(s)
  powerpc/mpc85xx: Create dts components for the FSL QorIQ DPAA FMan
  powerpc/fsl: Add #clock-cells and clockgen label to clockgen nodes
  powerpc: handle error case in cpm_muram_alloc()
  powerpc: mpic: use IRQCHIP_SKIP_SET_WAKE instead of redundant mpic_irq_set_wake
  powerpc/book3e-64: Enable kexec
  powerpc/book3e-64/kexec: Set "r4 = 0" when entering spinloop
  powerpc/booke: Only use VIRT_PHYS_OFFSET on booke32
  powerpc/book3e-64/kexec: Enable SMP release
  powerpc/book3e-64/kexec: create an identity TLB mapping
  powerpc/book3e-64: Don't limit paca to 256 MiB
  powerpc/book3e/kdump: Enable crash_kexec_wait_realmode
  powerpc/book3e: support CONFIG_RELOCATABLE
  powerpc/booke64: Fix args to copy_and_flush
  powerpc/book3e-64: rename interrupt_end_book3e with __end_interrupts
  powerpc/e6500: kexec: Handle hardware threads
  ...

6 files changed, 83 insertions, 54 deletions

diff --git a/arch/powerpc/sysdev/cpm_common.c b/arch/powerpc/sysdev/cpm_common.c
index e2ea51961979..e00a5ee58fd7 100644
--- a/arch/powerpc/sysdev/cpm_common.c
+++ b/arch/powerpc/sysdev/cpm_common.c
@@ -147,7 +147,8 @@ unsigned long cpm_muram_alloc(unsigned long size, unsigned long align)
 	spin_lock_irqsave(&cpm_muram_lock, flags);
 	cpm_muram_info.alignment = align;
 	start = rh_alloc(&cpm_muram_info, size, "commproc");
-	memset_io(cpm_muram_addr(start), 0, size);
+	if (!IS_ERR_VALUE(start))
+		memset_io(cpm_muram_addr(start), 0, size);
 	spin_unlock_irqrestore(&cpm_muram_lock, flags);
 
 	return start;
diff --git a/arch/powerpc/sysdev/fsl_pci.c b/arch/powerpc/sysdev/fsl_pci.c
index 13b9bcf5485e..610f472f91d1 100644
--- a/arch/powerpc/sysdev/fsl_pci.c
+++ b/arch/powerpc/sysdev/fsl_pci.c
@@ -179,6 +179,19 @@ static int setup_one_atmu(struct ccsr_pci __iomem *pci,
 	return i;
 }
 
+static bool is_kdump(void)
+{
+	struct device_node *node;
+
+	node = of_find_node_by_type(NULL, "memory");
+	if (!node) {
+		WARN_ON_ONCE(1);
+		return false;
+	}
+
+	return of_property_read_bool(node, "linux,usable-memory");
+}
+
 /* atmu setup for fsl pci/pcie controller */
 static void setup_pci_atmu(struct pci_controller *hose)
 {
@@ -192,6 +205,16 @@ static void setup_pci_atmu(struct pci_controller *hose)
 	const char *name = hose->dn->full_name;
 	const u64 *reg;
 	int len;
+	bool setup_inbound;
+
+	/*
+	 * If this is kdump, we don't want to trigger a bunch of PCI
+	 * errors by closing the window on in-flight DMA.
+	 *
+	 * We still run most of the function's logic so that things like
+	 * hose->dma_window_size still get set.
+	 */
+	setup_inbound = !is_kdump();
 
 	if (early_find_capability(hose, 0, 0, PCI_CAP_ID_EXP)) {
 		if (in_be32(&pci->block_rev1) >= PCIE_IP_REV_2_2) {
@@ -204,8 +227,11 @@ static void setup_pci_atmu(struct pci_controller *hose)
 	/* Disable all windows (except powar0 since it's ignored) */
 	for(i = 1; i < 5; i++)
 		out_be32(&pci->pow[i].powar, 0);
-	for (i = start_idx; i < end_idx; i++)
-		out_be32(&pci->piw[i].piwar, 0);
+
+	if (setup_inbound) {
+		for (i = start_idx; i < end_idx; i++)
+			out_be32(&pci->piw[i].piwar, 0);
+	}
 
 	/* Setup outbound MEM window */
 	for(i = 0, j = 1; i < 3; i++) {
@@ -278,6 +304,7 @@ static void setup_pci_atmu(struct pci_controller *hose)
 
 	/* Setup inbound mem window */
 	mem = memblock_end_of_DRAM();
+	pr_info("%s: end of DRAM %llx\n", __func__, mem);
 
 	/*
 	 * The msi-address-64 property, if it exists, indicates the physical
@@ -320,12 +347,14 @@ static void setup_pci_atmu(struct pci_controller *hose)
 
 		piwar |= ((mem_log - 1) & PIWAR_SZ_MASK);
 
-		/* Setup inbound memory window */
-		out_be32(&pci->piw[win_idx].pitar,  0x00000000);
-		out_be32(&pci->piw[win_idx].piwbar, 0x00000000);
-		out_be32(&pci->piw[win_idx].piwar,  piwar);
-		win_idx--;
+		if (setup_inbound) {
+			/* Setup inbound memory window */
+			out_be32(&pci->piw[win_idx].pitar,  0x00000000);
+			out_be32(&pci->piw[win_idx].piwbar, 0x00000000);
+			out_be32(&pci->piw[win_idx].piwar,  piwar);
+		}
 
+		win_idx--;
 		hose->dma_window_base_cur = 0x00000000;
 		hose->dma_window_size = (resource_size_t)sz;
 
@@ -343,13 +372,15 @@ static void setup_pci_atmu(struct pci_controller *hose)
 
 			piwar = (piwar & ~PIWAR_SZ_MASK) | (mem_log - 1);
 
-			/* Setup inbound memory window */
-			out_be32(&pci->piw[win_idx].pitar,  0x00000000);
-			out_be32(&pci->piw[win_idx].piwbear,
-					pci64_dma_offset >> 44);
-			out_be32(&pci->piw[win_idx].piwbar,
-					pci64_dma_offset >> 12);
-			out_be32(&pci->piw[win_idx].piwar,  piwar);
+			if (setup_inbound) {
+				/* Setup inbound memory window */
+				out_be32(&pci->piw[win_idx].pitar,  0x00000000);
+				out_be32(&pci->piw[win_idx].piwbear,
+						pci64_dma_offset >> 44);
+				out_be32(&pci->piw[win_idx].piwbar,
+						pci64_dma_offset >> 12);
+				out_be32(&pci->piw[win_idx].piwar,  piwar);
+			}
 
 			/*
 			 * install our own dma_set_mask handler to fixup dma_ops
@@ -362,12 +393,15 @@ static void setup_pci_atmu(struct pci_controller *hose)
 	} else {
 		u64 paddr = 0;
 
-		/* Setup inbound memory window */
-		out_be32(&pci->piw[win_idx].pitar,  paddr >> 12);
-		out_be32(&pci->piw[win_idx].piwbar, paddr >> 12);
-		out_be32(&pci->piw[win_idx].piwar,  (piwar | (mem_log - 1)));
-		win_idx--;
+		if (setup_inbound) {
+			/* Setup inbound memory window */
+			out_be32(&pci->piw[win_idx].pitar,  paddr >> 12);
+			out_be32(&pci->piw[win_idx].piwbar, paddr >> 12);
+			out_be32(&pci->piw[win_idx].piwar,
+				 (piwar | (mem_log - 1)));
+		}
 
+		win_idx--;
 		paddr += 1ull << mem_log;
 		sz -= 1ull << mem_log;
 
@@ -375,11 +409,15 @@ static void setup_pci_atmu(struct pci_controller *hose)
 			mem_log = ilog2(sz);
 			piwar |= (mem_log - 1);
 
-			out_be32(&pci->piw[win_idx].pitar,  paddr >> 12);
-			out_be32(&pci->piw[win_idx].piwbar, paddr >> 12);
-			out_be32(&pci->piw[win_idx].piwar,  piwar);
-			win_idx--;
+			if (setup_inbound) {
+				out_be32(&pci->piw[win_idx].pitar,
+					 paddr >> 12);
+				out_be32(&pci->piw[win_idx].piwbar,
+					 paddr >> 12);
+				out_be32(&pci->piw[win_idx].piwar, piwar);
+			}
 
+			win_idx--;
 			paddr += 1ull << mem_log;
 		}
 
@@ -1002,7 +1040,7 @@ int fsl_pci_mcheck_exception(struct pt_regs *regs)
 			ret = probe_kernel_address((void *)regs->nip, inst);
 		}
 
-		if (mcheck_handle_load(regs, inst)) {
+		if (!ret && mcheck_handle_load(regs, inst)) {
 			regs->nip += 4;
 			return 1;
 		}
diff --git a/arch/powerpc/sysdev/mpc5xxx_clocks.c b/arch/powerpc/sysdev/mpc5xxx_clocks.c
index f4f0301b9a60..573292663cf2 100644
--- a/arch/powerpc/sysdev/mpc5xxx_clocks.c
+++ b/arch/powerpc/sysdev/mpc5xxx_clocks.c
@@ -13,7 +13,6 @@
 
 unsigned long mpc5xxx_get_bus_frequency(struct device_node *node)
 {
-	struct device_node *np;
 	const unsigned int *p_bus_freq = NULL;
 
 	of_node_get(node);
@@ -22,9 +21,7 @@ unsigned long mpc5xxx_get_bus_frequency(struct device_node *node)
 		if (p_bus_freq)
 			break;
 
-		np = of_get_parent(node);
-		of_node_put(node);
-		node = np;
+		node = of_get_next_parent(node);
 	}
 	of_node_put(node);
 
diff --git a/arch/powerpc/sysdev/mpc8xx_pic.c b/arch/powerpc/sysdev/mpc8xx_pic.c
index 9a423975853a..b7cf7abff2eb 100644
--- a/arch/powerpc/sysdev/mpc8xx_pic.c
+++ b/arch/powerpc/sysdev/mpc8xx_pic.c
@@ -61,7 +61,7 @@ static int mpc8xx_set_irq_type(struct irq_data *d, unsigned int flow_type)
 }
 
 static struct irq_chip mpc8xx_pic = {
-	.name = "MPC8XX SIU",
+	.name = "8XX SIU",
 	.irq_unmask = mpc8xx_unmask_irq,
 	.irq_mask = mpc8xx_mask_irq,
 	.irq_ack = mpc8xx_ack,
diff --git a/arch/powerpc/sysdev/mpic.c b/arch/powerpc/sysdev/mpic.c
index cecd1156c185..2a0452e364ba 100644
--- a/arch/powerpc/sysdev/mpic.c
+++ b/arch/powerpc/sysdev/mpic.c
@@ -924,22 +924,6 @@ int mpic_set_irq_type(struct irq_data *d, unsigned int flow_type)
 	return IRQ_SET_MASK_OK_NOCOPY;
 }
 
-static int mpic_irq_set_wake(struct irq_data *d, unsigned int on)
-{
-	struct irq_desc *desc = container_of(d, struct irq_desc, irq_data);
-	struct mpic *mpic = mpic_from_irq_data(d);
-
-	if (!(mpic->flags & MPIC_FSL))
-		return -ENXIO;
-
-	if (on)
-		desc->action->flags |= IRQF_NO_SUSPEND;
-	else
-		desc->action->flags &= ~IRQF_NO_SUSPEND;
-
-	return 0;
-}
-
 void mpic_set_vector(unsigned int virq, unsigned int vector)
 {
 	struct mpic *mpic = mpic_from_irq(virq);
@@ -977,7 +961,6 @@ static struct irq_chip mpic_irq_chip = {
 	.irq_unmask	= mpic_unmask_irq,
 	.irq_eoi	= mpic_end_irq,
 	.irq_set_type	= mpic_set_irq_type,
-	.irq_set_wake	= mpic_irq_set_wake,
 };
 
 #ifdef CONFIG_SMP
@@ -992,7 +975,6 @@ static struct irq_chip mpic_tm_chip = {
 	.irq_mask	= mpic_mask_tm,
 	.irq_unmask	= mpic_unmask_tm,
 	.irq_eoi	= mpic_end_irq,
-	.irq_set_wake	= mpic_irq_set_wake,
 };
 
 #ifdef CONFIG_MPIC_U3_HT_IRQS
@@ -1284,8 +1266,11 @@ struct mpic * __init mpic_alloc(struct device_node *node,
 		flags |= MPIC_NO_RESET;
 	if (of_get_property(node, "single-cpu-affinity", NULL))
 		flags |= MPIC_SINGLE_DEST_CPU;
-	if (of_device_is_compatible(node, "fsl,mpic"))
+	if (of_device_is_compatible(node, "fsl,mpic")) {
 		flags |= MPIC_FSL | MPIC_LARGE_VECTORS;
+		mpic_irq_chip.flags |= IRQCHIP_SKIP_SET_WAKE;
+		mpic_tm_chip.flags |= IRQCHIP_SKIP_SET_WAKE;
+	}
 
 	mpic = kzalloc(sizeof(struct mpic), GFP_KERNEL);
 	if (mpic == NULL)
diff --git a/arch/powerpc/sysdev/msi_bitmap.c b/arch/powerpc/sysdev/msi_bitmap.c
index 73b64c73505b..ed5234ed8d3f 100644
--- a/arch/powerpc/sysdev/msi_bitmap.c
+++ b/arch/powerpc/sysdev/msi_bitmap.c
@@ -11,6 +11,7 @@
 #include <linux/slab.h>
 #include <linux/kernel.h>
 #include <linux/bitmap.h>
+#include <linux/bootmem.h>
 #include <asm/msi_bitmap.h>
 #include <asm/setup.h>
 
@@ -111,7 +112,7 @@ int msi_bitmap_reserve_dt_hwirqs(struct msi_bitmap *bmp)
 	return 0;
 }
 
-int msi_bitmap_alloc(struct msi_bitmap *bmp, unsigned int irq_count,
+int __init_refok msi_bitmap_alloc(struct msi_bitmap *bmp, unsigned int irq_count,
 		     struct device_node *of_node)
 {
 	int size;
@@ -122,7 +123,15 @@ int msi_bitmap_alloc(struct msi_bitmap *bmp, unsigned int irq_count,
 	size = BITS_TO_LONGS(irq_count) * sizeof(long);
 	pr_debug("msi_bitmap: allocator bitmap size is 0x%x bytes\n", size);
 
-	bmp->bitmap = zalloc_maybe_bootmem(size, GFP_KERNEL);
+	bmp->bitmap_from_slab = slab_is_available();
+	if (bmp->bitmap_from_slab)
+		bmp->bitmap = kzalloc(size, GFP_KERNEL);
+	else {
+		bmp->bitmap = memblock_virt_alloc(size, 0);
+		/* the bitmap won't be freed from memblock allocator */
+		kmemleak_not_leak(bmp->bitmap);
+	}
+
 	if (!bmp->bitmap) {
 		pr_debug("msi_bitmap: ENOMEM allocating allocator bitmap!\n");
 		return -ENOMEM;
@@ -138,7 +147,8 @@ int msi_bitmap_alloc(struct msi_bitmap *bmp, unsigned int irq_count,
 
 void msi_bitmap_free(struct msi_bitmap *bmp)
 {
-	/* we can't free the bitmap we don't know if it's bootmem etc. */
+	if (bmp->bitmap_from_slab)
+		kfree(bmp->bitmap);
 	of_node_put(bmp->of_node);
 	bmp->bitmap = NULL;
 }
@@ -203,8 +213,6 @@ static void __init test_basics(void)
 
 	/* Clients may WARN_ON bitmap == NULL for "not-allocated" */
 	WARN_ON(bmp.bitmap != NULL);
-
-	kfree(bmp.bitmap);
 }
 
 static void __init test_of_node(void)