linux.git/arch/arm/kernel, branch v4.13

Merge branch 'fixes' of git://git.armlinux.org.uk/~rmk/linux-arm

2017-07-27T17:35:07+00:00

Pull ARM fixes from Russell King:
 "Two areas addressed by these fixes:

   - Fixes from Dave Martin for the signal frames that were broken with
     certain configurations. No one noticed until recently.

   - More kexec fixes to ensure that the crashkernel region is correctly
     allocated, and a fix for the location of the device tree when
     several kexec kernels are loaded"

* 'fixes' of git://git.armlinux.org.uk/~rmk/linux-arm:
  ARM: 8687/1: signal: Fix unparseable iwmmxt_sigframe in uc_regspace[]
  ARM: 8686/1: iwmmxt: Add missing __user annotations to sigframe accessors
  ARM: kexec: fix failure to boot crash kernel
  ARM: kexec: avoid allocating crashkernel region outside lowmem

ARM: 8687/1: signal: Fix unparseable iwmmxt_sigframe in uc_regspace[]

2017-07-24T13:26:55+00:00

In kernels with CONFIG_IWMMXT=y running on non-iWMMXt hardware, the
signal frame can be left partially uninitialised in such a way
that userspace cannot parse uc_regspace[] safely.  In particular,
this means that the VFP registers cannot be located reliably in the
signal frame when a multi_v7_defconfig kernel is run on the
majority of platforms.

The cause is that the uc_regspace[] is laid out statically based on
the kernel config, but the decision of whether to save/restore the
iWMMXt registers must be a runtime decision.

To minimise breakage of software that may assume a fixed layout,
this patch emits a dummy block of the same size as iwmmxt_sigframe,
for non-iWMMXt threads.  However, the magic and size of this block
are now filled in to help parsers skip over it.  A new DUMMY_MAGIC
is defined for this purpose.

It is probably legitimate (if non-portable) for userspace to
manufacture its own sigframe for sigreturn, and there is no obvious
reason why userspace should be required to insert a DUMMY_MAGIC
block when running on non-iWMMXt hardware, when omitting it has
worked just fine forever in other configurations.  So in this case,
sigreturn does not require this block to be present.

Reported-by: Edmund Grimley-Evans 
Signed-off-by: Dave Martin 
Signed-off-by: Russell King

ARM: 8686/1: iwmmxt: Add missing __user annotations to sigframe accessors

2017-07-24T13:26:54+00:00

preserve_iwmmxt_context() and restore_iwmmxt_context() lack __user
accessors on their arguments pointing to the user signal frame.

There does not be appear to be a bug here, but this omission is
inconsistent with the crunch and vfp sigframe access functions.

This patch adds the annotations, for consistency.

Signed-off-by: Dave Martin 
Signed-off-by: Russell King

ARM: kexec: fix failure to boot crash kernel

2017-07-20T10:37:42+00:00

When kexec was converted to DTB, the dtb address was passed between
machine_kexec_prepare() and machine_kexec() using a static variable.
This is bad news if you load a crash kernel followed by a normal
kernel or vice versa - the last loaded kernel overwrites the dtb
address.

This can result in kexec failures, as (eg) we try to boot the crash
kernel with the last loaded dtb.  For example, with:

the crash kernel fails to find the dtb.

Avoid this by defining a kimage architecture structure, and store
the address to be passed in r2 there, which will either be the ATAGs
or the dtb blob.

Fixes: 4cabd1d9625c ("ARM: 7539/1: kexec: scan for dtb magic in segments")
Fixes: 42d720d1731a ("ARM: kexec: Make .text R/W in machine_kexec")
Reported-by: Keerthy 
Tested-by: Keerthy 
Signed-off-by: Russell King

ARM: kexec: avoid allocating crashkernel region outside lowmem

2017-07-20T10:37:15+00:00

Allocating the crashkernel region outside lowmem causes the kernel to
oops while trying to kexec into the new kernel:

Loading crashdump kernel...
Unable to handle kernel NULL pointer dereference at virtual address 00000000
pgd = edd70000
[00000000] *pgd=de19e835
Internal error: Oops: 817 [#2] SMP ARM
Modules linked in: ...
CPU: 0 PID: 689 Comm: sh Not tainted 4.12.0-rc3-next-20170601-04015-gc3a5a20
Hardware name: Generic DRA74X (Flattened Device Tree)
task: edb32f00 task.stack: edf18000
PC is at memcpy+0x50/0x330
LR is at 0xe3c34001
pc : []    lr : []    psr: 800c0193
sp : edf19c2c  ip : 0a000001  fp : c0553170
r10: c055316e  r9 : 00000001  r8 : e3130001
r7 : e4903004  r6 : 0a000014  r5 : e3500000  r4 : e59f106c
r3 : e59f0074  r2 : ffffffe8  r1 : c010fb88  r0 : 00000000
Flags: Nzcv  IRQs off  FIQs on  Mode SVC_32  ISA ARM  Segment none
Control: 10c5387d  Table: add7006a  DAC: 00000051
Process sh (pid: 689, stack limit = 0xedf18218)
Stack: (0xedf19c2c to 0xedf1a000)
...
[] (memcpy) from [] (machine_kexec+0xa8/0x12c)
[] (machine_kexec) from [] (__crash_kexec+0x5c/0x98)
[] (__crash_kexec) from [] (crash_kexec+0x5c/0x68)
[] (crash_kexec) from [] (die+0x228/0x490)
[] (die) from [] (__do_kernel_fault.part.0+0x54/0x1e4)
[] (__do_kernel_fault.part.0) from [] (do_page_fault+0x1e8/0x400)
[] (do_page_fault) from [] (do_DataAbort+0x38/0xb8)
[] (do_DataAbort) from [] (__dabt_svc+0x64/0xa0)

This is caused by image->control_code_page being a highmem page, so
page_address(image->control_code_page) returns NULL.  In any case, we
don't want the control page to be a highmem page.

We already limit the crash kernel region to the top of 32-bit physical
memory space.  Also limit it to the top of lowmem in physical space.

Reported-by: Keerthy 
Tested-by: Keerthy 
Signed-off-by: Russell King

Merge tag 'pci-v4.13-fixes-1' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci

2017-07-14T19:36:20+00:00

Pull PCI fixes from Bjorn Helgaas:

 - fix a typo that broke Rockchip enumeration

 - fix a new memory leak in the ARM host bridge failure path

* tag 'pci-v4.13-fixes-1' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci:
  PCI: rockchip: Check for pci_scan_root_bus_bridge() failure correctly
  ARM/PCI: Fix pcibios_init_resource() struct pci_host_bridge leak

ARM: fix rd_size declaration

2017-07-10T23:32:34+00:00

The global variable 'rd_size' is declared as 'int' in source file
arch/arm/kernel/atags_parse.c and as 'unsigned long' in
drivers/block/brd.c.  Fix this inconsistency.

Additionally, remove the declarations of rd_image_start, rd_prompt and
rd_doload from parse_tag_ramdisk() since these duplicate existing
declarations in .

Link: http://lkml.kernel.org/r/20170627065024.12347-1-bart.vanassche@wdc.com
Signed-off-by: Bart Van Assche 
Acked-by: Russell King 
Cc: Jens Axboe 
Cc: Jan Kara 
Cc: Jason Yan 
Cc: Zhaohongjiang 
Cc: Miao Xie 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

ARM/PCI: Fix pcibios_init_resource() struct pci_host_bridge leak

2017-07-10T14:33:14+00:00

Since commit 97ad2bdcbe85 ("ARM/PCI: Convert PCI scan API to
pci_scan_root_bus_bridge()") the space for struct pci_sys_data is allocated
by pci_alloc_host_bridge() as part of the struct pci_host_bridge.

Therefore, failure paths must deallocate the entire pci_host_bridge by
using pci_free_host_bridge().

Fixes: 97ad2bdcbe85 ("ARM/PCI: Convert PCI scan API to pci_scan_root_bus_bridge()")
Signed-off-by: Lorenzo Pieralisi 
[bhelgaas: changelog]
Signed-off-by: Bjorn Helgaas 
Cc: Jason Cooper 
Cc: Russell King 
Cc: Andrew Lunn

Merge tag 'pci-v4.13-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci

2017-07-08T22:51:57+00:00

Pull PCI updates from Bjorn Helgaas:

  - add sysfs max_link_speed/width, current_link_speed/width (Wong Vee
    Khee)

  - make host bridge IRQ mapping much more generic (Matthew Minter,
    Lorenzo Pieralisi)

  - convert most drivers to pci_scan_root_bus_bridge() (Lorenzo
    Pieralisi)

  - mutex sriov_configure() (Jakub Kicinski)

  - mutex pci_error_handlers callbacks (Christoph Hellwig)

  - split ->reset_notify() into ->reset_prepare()/reset_done()
    (Christoph Hellwig)

  - support multiple PCIe portdrv interrupts for MSI as well as MSI-X
    (Gabriele Paoloni)

  - allocate MSI/MSI-X vector for Downstream Port Containment (Gabriele
    Paoloni)

  - fix MSI IRQ affinity pre/post/min_vecs issue (Michael Hernandez)

  - test INTx masking during enumeration, not at run-time (Piotr Gregor)

  - avoid using device_may_wakeup() for runtime PM (Rafael J. Wysocki)

  - restore the status of PCI devices across hibernation (Chen Yu)

  - keep parent resources that start at 0x0 (Ard Biesheuvel)

  - enable ECRC only if device supports it (Bjorn Helgaas)

  - restore PRI and PASID state after Function-Level Reset (CQ Tang)

  - skip DPC event if device is not present (Keith Busch)

  - check domain when matching SMBIOS info (Sujith Pandel)

  - mark Intel XXV710 NIC INTx masking as broken (Alex Williamson)

  - avoid AMD SB7xx EHCI USB wakeup defect (Kai-Heng Feng)

  - work around long-standing Macbook Pro poweroff issue (Bjorn Helgaas)

  - add Switchtec "running" status flag (Logan Gunthorpe)

  - fix dra7xx incorrect RW1C IRQ register usage (Arvind Yadav)

  - modify xilinx-nwl IRQ chip for legacy interrupts (Bharat Kumar
    Gogada)

  - move VMD SRCU cleanup after bus, child device removal (Jon Derrick)

  - add Faraday clock handling (Linus Walleij)

  - configure Rockchip MPS and reorganize (Shawn Lin)

  - limit Qualcomm TLP size to 2K (hardware issue) (Srinivas Kandagatla)

  - support Tegra MSI 64-bit addressing (Thierry Reding)

  - use Rockchip normal (not privileged) register bank (Shawn Lin)

  - add HiSilicon Kirin SoC PCIe controller driver (Xiaowei Song)

  - add Sigma Designs Tango SMP8759 PCIe controller driver (Marc
    Gonzalez)

  - add MediaTek PCIe host controller support (Ryder Lee)

  - add Qualcomm IPQ4019 support (John Crispin)

  - add HyperV vPCI protocol v1.2 support (Jork Loeser)

  - add i.MX6 regulator support (Quentin Schulz)

* tag 'pci-v4.13-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (113 commits)
  PCI: tango: Add Sigma Designs Tango SMP8759 PCIe host bridge support
  PCI: Add DT binding for Sigma Designs Tango PCIe controller
  PCI: rockchip: Use normal register bank for config accessors
  dt-bindings: PCI: Add documentation for MediaTek PCIe
  PCI: Remove __pci_dev_reset() and pci_dev_reset()
  PCI: Split ->reset_notify() method into ->reset_prepare() and ->reset_done()
  PCI: xilinx: Make of_device_ids const
  PCI: xilinx-nwl: Modify IRQ chip for legacy interrupts
  PCI: vmd: Move SRCU cleanup after bus, child device removal
  PCI: vmd: Correct comment: VMD domains start at 0x10000, not 0x1000
  PCI: versatile: Add local struct device pointers
  PCI: tegra: Do not allocate MSI target memory
  PCI: tegra: Support MSI 64-bit addressing
  PCI: rockchip: Use local struct device pointer consistently
  PCI: rockchip: Check for clk_prepare_enable() errors during resume
  MAINTAINERS: Remove Wenrui Li as Rockchip PCIe driver maintainer
  PCI: rockchip: Configure RC's MPS setting
  PCI: rockchip: Reconfigure configuration space header type
  PCI: rockchip: Split out rockchip_pcie_cfg_configuration_accesses()
  PCI: rockchip: Move configuration accesses into rockchip_pcie_cfg_atu()
  ...

Merge branch 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm

2017-07-08T19:17:25+00:00

Pull ARM updates from Russell King:

 - add support for ftrace-with-registers, which is needed for kgraft and
   other ftrace tools

 - support for mremap() for the sigpage/vDSO so that checkpoint/restore
   can work

 - add timestamps to each line of the register dump output

 - remove the unused KTHREAD_SIZE from nommu

 - align the ARM bitops APIs with the generic API (using unsigned long
   pointers rather than void pointers)

 - make the configuration of userspace Thumb support an expert option so
   that we can default it on, and avoid some hard to debug userspace
   crashes

* 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm:
  ARM: 8684/1: NOMMU: Remove unused KTHREAD_SIZE definition
  ARM: 8683/1: ARM32: Support mremap() for sigpage/vDSO
  ARM: 8679/1: bitops: Align prototypes to generic API
  ARM: 8678/1: ftrace: Adds support for CONFIG_DYNAMIC_FTRACE_WITH_REGS
  ARM: make configuration of userspace Thumb support an expert option
  ARM: 8673/1: Fix __show_regs output timestamps