Commit Graph

39051 Commits

Author SHA1 Message Date
Paolo Bonzini
8999602d08 Fixes for KVM/ARM for 4.0-rc5.
Fixes page refcounting issues in our Stage-2 page table management code,
 fixes a missing unlock in a gicv3 error path, and fixes a race that can
 cause lost interrupts if signals are pending just prior to entering the
 guest.
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Merge tag 'kvm-arm-fixes-4.0-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into 'kvm-next'

Fixes for KVM/ARM for 4.0-rc5.

Fixes page refcounting issues in our Stage-2 page table management code,
fixes a missing unlock in a gicv3 error path, and fixes a race that can
cause lost interrupts if signals are pending just prior to entering the
guest.
2015-04-07 18:06:01 +02:00
Marc Zyngier
04b8dc85bf arm64: KVM: Do not use pgd_index to index stage-2 pgd
The kernel's pgd_index macro is designed to index a normal, page
sized array. KVM is a bit diffferent, as we can use concatenated
pages to have a bigger address space (for example 40bit IPA with
4kB pages gives us an 8kB PGD.

In the above case, the use of pgd_index will always return an index
inside the first 4kB, which makes a guest that has memory above
0x8000000000 rather unhappy, as it spins forever in a page fault,
whist the host happilly corrupts the lower pgd.

The obvious fix is to get our own kvm_pgd_index that does the right
thing(tm).

Tested on X-Gene with a hacked kvmtool that put memory at a stupidly
high address.

Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
2015-03-11 14:24:36 +01:00
Marc Zyngier
a987370f8e arm64: KVM: Fix stage-2 PGD allocation to have per-page refcounting
We're using __get_free_pages with to allocate the guest's stage-2
PGD. The standard behaviour of this function is to return a set of
pages where only the head page has a valid refcount.

This behaviour gets us into trouble when we're trying to increment
the refcount on a non-head page:

page:ffff7c00cfb693c0 count:0 mapcount:0 mapping:          (null) index:0x0
flags: 0x4000000000000000()
page dumped because: VM_BUG_ON_PAGE((*({ __attribute__((unused)) typeof((&page->_count)->counter) __var = ( typeof((&page->_count)->counter)) 0; (volatile typeof((&page->_count)->counter) *)&((&page->_count)->counter); })) <= 0)
BUG: failure at include/linux/mm.h:548/get_page()!
Kernel panic - not syncing: BUG!
CPU: 1 PID: 1695 Comm: kvm-vcpu-0 Not tainted 4.0.0-rc1+ #3825
Hardware name: APM X-Gene Mustang board (DT)
Call trace:
[<ffff80000008a09c>] dump_backtrace+0x0/0x13c
[<ffff80000008a1e8>] show_stack+0x10/0x1c
[<ffff800000691da8>] dump_stack+0x74/0x94
[<ffff800000690d78>] panic+0x100/0x240
[<ffff8000000a0bc4>] stage2_get_pmd+0x17c/0x2bc
[<ffff8000000a1dc4>] kvm_handle_guest_abort+0x4b4/0x6b0
[<ffff8000000a420c>] handle_exit+0x58/0x180
[<ffff80000009e7a4>] kvm_arch_vcpu_ioctl_run+0x114/0x45c
[<ffff800000099df4>] kvm_vcpu_ioctl+0x2e0/0x754
[<ffff8000001c0a18>] do_vfs_ioctl+0x424/0x5c8
[<ffff8000001c0bfc>] SyS_ioctl+0x40/0x78
CPU0: stopping

A possible approach for this is to split the compound page using
split_page() at allocation time, and change the teardown path to
free one page at a time.  It turns out that alloc_pages_exact() and
free_pages_exact() does exactly that.

While we're at it, the PGD allocation code is reworked to reduce
duplication.

This has been tested on an X-Gene platform with a 4kB/48bit-VA host
kernel, and kvmtool hacked to place memory in the second page of
the hardware PGD (PUD for the host kernel). Also regression-tested
on a Cubietruck (Cortex-A7).

 [ Reworked to use alloc_pages_exact() and free_pages_exact() and to
   return pointers directly instead of by reference as arguments
    - Christoffer ]

Reported-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
2015-03-11 14:23:20 +01:00
Arnd Bergmann
04b91701d4 ARM: fix typos in smc91x platform data
I recently did a rework of the smc91x driver and did some build-testing
by compiling hundreds of randconfig kernels. Unfortunately, my script
was wrong and did not actually test the configurations that mattered,
so I introduced stupid typos in almost every file I touched.

I fixed my script now, built all configurations that actually matter
and fixed all the typos, this is the result.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Fixes: b70661c708 ("net: smc91x: use run-time configuration on all ARM machines")
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-04 23:32:26 -05:00
Linus Torvalds
b8e81a3b68 Merge git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull KVM fixes from Marcelo Tosatti:
 "KVM bug fixes, including a SVM interrupt injection regression fix,
  MIPS and ARM bug fixes"

* git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: MIPS: Enable after disabling interrupt
  KVM: MIPS: Fix trace event to save PC directly
  KVM: SVM: fix interrupt injection (apic->isr_count always 0)
  KVM: emulate: fix CMPXCHG8B on 32-bit hosts
  KVM: VMX: fix build without CONFIG_SMP
  arm/arm64: KVM: Add exit reaons to kvm_exit event tracing
  ARM: KVM: Fix size check in __coherent_cache_guest_page
2015-03-04 09:54:10 -08:00
Linus Torvalds
789d7f60cd Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Pull networking fixes from David Miller:

 1) If an IPVS tunnel is created with a mixed-family destination
    address, it cannot be removed.  Fix from Alexey Andriyanov.

 2) Fix module refcount underflow in netfilter's nft_compat, from Pablo
    Neira Ayuso.

 3) Generic statistics infrastructure can reference variables sitting on
    a released function stack, therefore use dynamic allocation always.
    Fix from Ignacy Gawędzki.

 4) skb_copy_bits() return value test is inverted in ip_check_defrag().

 5) Fix network namespace exit in openvswitch, we have to release all of
    the per-net vports.  From Pravin B Shelar.

 6) Fix signedness bug in CAIF's cfpkt_iterate(), from Dan Carpenter.

 7) Fix rhashtable grow/shrink behavior, only expand during inserts and
    shrink during deletes.  From Daniel Borkmann.

 8) Netdevice names with semicolons should never be allowed, because
    they serve as a separator.  From Matthew Thode.

 9) Use {,__}set_current_state() where appropriate, from Fabian
    Frederick.

10) Revert byte queue limits support in r8169 driver, it's causing
    regressions we can't figure out.

11) tcp_should_expand_sndbuf() erroneously uses tp->packets_out to
    measure packets in flight, properly use tcp_packets_in_flight()
    instead.  From Neal Cardwell.

12) Fix accidental removal of support for bluetooth in CSR based Intel
    wireless cards.  From Marcel Holtmann.

13) We accidently added a behavioral change between native and compat
    tasks, wrt testing the MSG_CMSG_COMPAT bit.  Just ignore it if the
    user happened to set it in a native binary as that was always the
    behavior we had.  From Catalin Marinas.

14) Check genlmsg_unicast() return valud in hwsim netlink tx frame
    handling, from Bob Copeland.

15) Fix stale ->radar_required setting in mac80211 that can prevent
    starting new scans, from Eliad Peller.

16) Fix memory leak in nl80211 monitor, from Johannes Berg.

17) Fix race in TX index handling in xen-netback, from David Vrabel.

18) Don't enable interrupts in amx-xgbe driver until all software et al.
    state is ready for the interrupt handler to run.  From Thomas
    Lendacky.

19) Add missing netlink_ns_capable() checks to rtnl_newlink(), from Eric
    W Biederman.

20) The amount of header space needed in macvtap was not calculated
    properly, fix it otherwise we splat past the beginning of the
    packet.  From Eric Dumazet.

21) Fix bcmgenet TCP TX perf regression, from Jaedon Shin.

22) Don't raw initialize or mod timers, use setup_timer() and
    mod_timer() instead.  From Vaishali Thakkar.

23) Fix software maintained statistics in bcmgenet and systemport
    drivers, from Florian Fainelli.

24) DMA descriptor updates in sh_eth need proper memory barriers, from
    Ben Hutchings.

25) Don't do UDP Fragmentation Offload on RAW sockets, from Michal
    Kubecek.

26) Openvswitch's non-masked set actions aren't constructed properly
    into netlink messages, fix from Joe Stringer.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (116 commits)
  openvswitch: Fix serialization of non-masked set actions.
  gianfar: Reduce logging noise seen due to phy polling if link is down
  ibmveth: Add function to enable live MAC address changes
  net: bridge: add compile-time assert for cb struct size
  udp: only allow UFO for packets from SOCK_DGRAM sockets
  sh_eth: Really fix padding of short frames on TX
  Revert "sh_eth: Enable Rx descriptor word 0 shift for r8a7790"
  sh_eth: Fix RX recovery on R-Car in case of RX ring underrun
  sh_eth: Ensure proper ordering of descriptor active bit write/read
  net/mlx4_en: Disbale GRO for incoming loopback/selftest packets
  net/mlx4_core: Fix wrong mask and error flow for the update-qp command
  net: systemport: fix software maintained statistics
  net: bcmgenet: fix software maintained statistics
  rxrpc: don't multiply with HZ twice
  rxrpc: terminate retrans loop when sending of skb fails
  net/hsr: Fix NULL pointer dereference and refcnt bugs when deleting a HSR interface.
  net: pasemi: Use setup_timer and mod_timer
  net: stmmac: Use setup_timer and mod_timer
  net: 8390: axnet_cs: Use setup_timer and mod_timer
  net: 8390: pcnet_cs: Use setup_timer and mod_timer
  ...
2015-03-03 15:30:07 -08:00
Linus Torvalds
640c0f5c57 Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull timer fixes from Ingo Molnar:
 "Three clockevents/clocksource driver fixes"

* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  clocksource: pxa: Fix section mismatch
  clocksource: mtk: Fix race conditions in probe code
  clockevents: asm9260: Fix compilation error with sparc/sparc64 allyesconfig
2015-03-01 12:00:25 -08:00
Arnd Bergmann
b70661c708 net: smc91x: use run-time configuration on all ARM machines
The smc91x driver traditionally gets configured at compile-time
for whichever hardware it runs on. This no longer works on
ARM as we continue to move to building all-in-one kernels.

Most ARM configurations with this driver already use run-time
configuration through DT or through platform_data, but a
few have not been converted yet.

I've checked all ARM boards that use this driver in their
legacy board files, and converted the ones that were using
compile-time configuration in smc91x.h to behave like the
other ones and provide the interrupt polarity along with
the MMIO configuration (width, stride) at platform device
creation time.

In particular, these combinations were previously selectable
in Kconfig but in fact broken:

- sa1100 assabet plus pleb
- msm combined with any other armv6/v7 platform
- pxa-idp combined with any non-DMA pxa variant
- LogicPD PXA270 combined with any other pxa
- nomadik combined with any other armv4/v5 platform,
  e.g. versatile.

None of these seem critical enough to warrant a backport
to stable, but it would be nice to clean this up for good.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
----
I would like the patch to get merged through netdev, after
Robert and/or Linus have verified it on at least some hardware.

There are a few other non-ARM platforms using this driver,
I could do the same patch for those if we want to take
it further.

 arch/arm/mach-msm/board-halibut.c    |   8 ++++-
 arch/arm/mach-msm/board-qsd8x50.c    |   8 ++++-
 arch/arm/mach-pxa/idp.c              |   5 +++
 arch/arm/mach-pxa/lpd270.c           |   8 ++++-
 arch/arm/mach-realview/core.c        |   7 ++++
 arch/arm/mach-realview/realview_eb.c |   2 +-
 arch/arm/mach-sa1100/neponset.c      |   6 ++++
 arch/arm/mach-sa1100/pleb.c          |   7 ++++
 drivers/net/ethernet/smsc/smc91x.c   |   9 +++--
 drivers/net/ethernet/smsc/smc91x.h   | 114 ++----------------------------------------------------------
 10 files changed, 57 insertions(+), 117 deletions(-)
Tested-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-02-28 12:56:56 -05:00
Geert Uytterhoeven
4a3a6f8669 ARM: multi_v7_defconfig: Enable shmobile platforms
Enable support for shmobile platforms that became multi-platform aware.
Several non-critical drivers and subsystems are built as modules, to keep
kernel size reasonable.

Tested on:
  - r8a73a4/ape6evm:
      - U-Boot fails with "Error: unrecognized/unsupported machine ID",
      - kexec works.
  - r8a7740/armadillo:
      - Hermit boot loader fails (larger image, more memory corruption),
      - kexec works.
  - r8a7791/koelsch,
  - sh73a0/kzm9g:
      - zImage+DTB from U-Boot needs CONFIG_ARM_ATAG_DTB_COMPAT=n,
      - kexec works.
  - am335x/boneblack.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2015-02-26 16:36:09 +01:00
Daniel Lezcano
a8b1b9fc92 clockevents: asm9260: Fix compilation error with sparc/sparc64 allyesconfig
The Kconfig options for the asm9260 timer is wrong as it can be selected by
another platform with allyes config and thus leading to a compilation failure
as some non arch related code is pulled by the compilation.

Fix this by having the platform Kconfig to select the timer as it is done for
the others drivers.

Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: Oleksij Rempel <linux@rempel-privat.de>

Conflicts:
	drivers/clocksource/Kconfig
2015-02-25 10:28:22 +01:00
Robert Nelson
67fd14b3ec ARM: dts: am335x-bone*: usb0 is hardwired for peripheral
Fixes: http://bugs.elinux.org/issues/127

the bb.org community was seeing random reboots before this change.

Signed-off-by: Robert Nelson <robertcnelson@gmail.com>
Reviewed-by: Felipe Balbi <balbi@ti.com>
Acked-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
2015-02-24 10:35:44 -08:00
Roger Quadros
addfcde7c4 ARM: dts: dra7x-evm: beagle-x15: Fix USB Host
In commit 87517d26d8 ("ARM: dts: dra7-evm: Add extcon nodes for USB")
we enabled Extcon USB gpio to tackle the USB ID pin and get
peripheral mode to work.

But the extcon-gpio-usb driver [1] didn't make it into v4.0
and this makes the USB driver defer probe indefinitely breaking
USB Host functionality.

As a temporary fix we remove the extcon handle from the
USB controller and add it back when the extcon driver
merges in v4.1.

[1] - https://lkml.org/lkml/2015/2/2/187

Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
2015-02-24 10:35:43 -08:00
Roger Quadros
acd83a1652 ARM: omap2plus_defconfig: Fix SATA boot
SATA operation depends on PIPE3 PHY and if we want
to boot from SATA drives, we have to have the PIPE3 PHY
driver built-in.

Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
2015-02-24 10:35:43 -08:00
Roger Quadros
f8c360588c ARM: omap2plus_defconfig: Enable OMAP NAND BCH driver
Without this NAND doesn't work on most EVMs.

Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
2015-02-24 10:35:43 -08:00
Peter Ujfalusi
08d9b327e6 ARM: dts: dra7: Correct the dma controller's property names
According to the Documentation/devicetree/bindings/dma/dma.txt the
dma-channels and dma-requests property should not have '#'.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
2015-02-24 10:35:43 -08:00
Peter Ujfalusi
951c1c04c6 ARM: dts: omap5: Correct the dma controller's property names
According to the Documentation/devicetree/bindings/dma/dma.txt the
dma-channels and dma-requests property should not have '#'.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
2015-02-24 10:35:43 -08:00
Peter Ujfalusi
24ac177049 ARM: dts: omap4: Correct the dma controller's property names
According to the Documentation/devicetree/bindings/dma/dma.txt the
dma-channels and dma-requests property should not have '#'.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
2015-02-24 10:35:43 -08:00
Peter Ujfalusi
7e8d25d596 ARM: dts: omap3: Correct the dma controller's property names
According to the Documentation/devicetree/bindings/dma/dma.txt the
dma-channels and dma-requests property should not have '#'.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
2015-02-24 10:35:43 -08:00
Peter Ujfalusi
caa73a4688 ARM: dts: omap2: Correct the dma controller's property names
According to the Documentation/devicetree/bindings/dma/dma.txt the
dma-channels and dma-requests property should not have '#'.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
2015-02-24 10:35:43 -08:00
Felipe Balbi
ee5d9cd2b3 ARM: dts: am437x-idk: fix sleep pinctrl state
we have i2c0 sleep pinctrl state but were passing
default state anyhow. Fix that.

Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
2015-02-24 10:35:43 -08:00
Felipe Balbi
57fd4e5d38 ARM: omap2plus_defconfig: enable TPS62362 regulator
This regulator is used on AM437x Industrial Development Kit.

Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
2015-02-24 10:35:43 -08:00
Felipe Balbi
1236044825 ARM: dts: am437x-idk: fix TPS62362 i2c bus
As it turns out, tps62362 is actually on I2C bus0,
not bus1. This has gone unnoticed because Linux
doesn't use (as of now) that regulator at all, it's
setup by the bootloader and left as is.

While at that, also add missing reg property for
our regulator.

Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
2015-02-24 10:35:43 -08:00
Pali Rohár
cb9071d4bb ARM: dts: n900: Fix offset for smc91x ethernet
Offset for smc91x must be zero otherwise smc91x linux kernel driver does not
detect smc91x ethernet hardware in qemu N900 machine.

The 0x300 offset was used to supress a warning the smsc911x
driver produces about non-standard offset as 0x300 seems to
be the EEPROM default. As only three address lines are
connected both 0 and 0x300 will work just fine with 0 being
correct. The warning about the non-standard offset can be
fixed by writing to EEPROM as that's needed in any case to
set the MAC address.

Signed-off-by: Pali Rohár <pali.rohar@gmail.com>
[tony@atomide.com: updated comments, just use 0 instead of 0x0]
Signed-off-by: Tony Lindgren <tony@atomide.com>
2015-02-24 10:35:43 -08:00
Ivaylo Dimitrov
1861cda0de ARM: dts: n900: fix i2c bus numbering
With legacy boot i2c buses on Nokia N900 are numbered i2c1, i2c2 and i2c3.
Commit 20b80942ef ("ARM: dts: OMAP3+: Add i2c aliases") fixed the
numbering with DT boot, but introduced a regression on N900 - aliases
become i2c0, i2c1 and i2c2. Fix that by providing the correct aliases in
the board dts.

Signed-off-by: Ivaylo Dimitrov <ivo.g.dimitrov.75@gmail.com>
Tested-by: Pali Rohár <pali.rohar@gmail.com>
Acked-by: Nishanth Menon <nm@ti.com>
[tony@atomide.com: this is needed for legacy user space to work]
Signed-off-by: Tony Lindgren <tony@atomide.com>
2015-02-24 10:35:43 -08:00
Tony Lindgren
a54879a008 ARM: dts: Fix USB dts configuration for dm816x
Commit 7800064ba5 ("ARM: dts: Add basic dm816x device tree
configuration") added basic devices for dm816x, but I was not able
to test the USB completely because of an unconfigured USB phy, and
I only tested it to make sure the Mentor chips are detected and
clocked without a phy.

After testing the USB with actual devices I noticed a few issues
that should be fixed to avoid confusion:

- The USB id pin on dm8168-evm is hardwired and can be changed
  only by software. As there are two USB-A type connectors, let's
  start both in host mode instead of otg.

- The Mentor core is configured in such a way on dm8168-evm that
  it's not capable of multipoint at least on revision c board
  that I have.

- We need ranges for the syscon to properly set up the phy as
  children of the SCM syscon area.

- Let's not disable the second interface, the board specific
  dts files can do that if really needed. Most boards should
  just keep it enabled to ensure the device is idled properly.

Note that also a phy and several musb fixes are still needed to
make the USB to work properly in addition to this fix.

Cc: Brian Hutchinson <b.hutchman@gmail.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
2015-02-24 08:48:52 -08:00
Roger Quadros
a0182724ab ARM: dts: OMAP5: Fix SATA PHY node
The sata_ref_clk is a reference clock to the SATA phy.
This fixes SATA malfunction across suspend/resume or when
SATA driver is used as a module.

Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
2015-02-24 08:16:49 -08:00
Roger Quadros
773c5a0fca ARM: dts: DRA7: Fix SATA PHY node
The sata_ref_clk is a reference clock to the SATA phy.
This fixes SATA malfunction across suspend/resume or when
SATA driver is used as a module.

Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
2015-02-24 08:15:53 -08:00
Wei Huang
91314cb005 arm/arm64: KVM: Add exit reaons to kvm_exit event tracing
This patch extends trace_kvm_exit() to include KVM exit reasons
(i.e. EC of HSR). The tracing function then dumps both exit reason
and PC of vCPU, shown as the following. Tracing tools can use this
new exit_reason field to better understand the behavior of guest VMs.

886.301252: kvm_exit:             HSR_EC: 0x0024, PC: 0xfffffe0000506b28

Signed-off-by: Wei Huang <wei@redhat.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
2015-02-23 22:28:48 +01:00
Jan Kiszka
a050dfb21c ARM: KVM: Fix size check in __coherent_cache_guest_page
The check is supposed to catch page-unaligned sizes, not the inverse.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
2015-02-23 22:28:47 +01:00
Linus Torvalds
90c453ca22 Merge branch 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm
Pull ARM fix from Russell King:
 "Just one fix this time around.  __iommu_alloc_buffer() can cause a
  BUG() if dma_alloc_coherent() is called with either __GFP_DMA32 or
  __GFP_HIGHMEM set.  The patch from Alexandre addresses this"

* 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm:
  ARM: 8305/1: DMA: Fix kzalloc flags in __iommu_alloc_buffer()
2015-02-22 09:57:16 -08:00
Linus Torvalds
2177033233 ARM: SoC fixes for 3.20-rc1
A few fixes that came in too late to make it into the first set of pull
 requests but would still be nice to have in -rc1. The majority of these
 are trivial build fixes for bugs that I found myself using randconfig
 testing, and a set of two patches from Uwe to mark DT strings as 'const'
 where appropriate, to resolve inconsistent section attributes.
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Merge tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull ARM SoC fixes from Arnd Bergmann:
 "A few fixes that came in too late to make it into the first set of
  pull requests but would still be nice to have in -rc1.

  The majority of these are trivial build fixes for bugs that I found
  myself using randconfig testing, and a set of two patches from Uwe to
  mark DT strings as 'const' where appropriate, to resolve inconsistent
  section attributes"

* tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
  ARM: make of_device_ids const
  ARM: make arrays containing machine compatible strings const
  ARM: mm: Remove Kconfig symbol CACHE_PL310
  ARM: rockchip: force built-in regulator support for PM
  ARM: mvebu: build armada375-smp code conditionally
  ARM: sti: always enable RESET_CONTROLLER
  ARM: rockchip: make rockchip_suspend_init conditional
  ARM: ixp4xx: fix {in,out}s{bwl} data types
  ARM: prima2: do not select SMP_ON_UP
  ARM: at91: fix pm declarations
  ARM: davinci: multi-soc kernels require AUTO_ZRELADDR
  ARM: davinci: davinci_cfg_reg cannot be init
  ARM: BCM: put back ARCH_MULTI_V7 dependency for mobile
  ARM: vexpress: use ARM_CPU_SUSPEND if needed
  ARM: dts: add I2C device nodes for Broadcom Cygnus
  ARM: dts: BCM63xx: fix L2 cache properties
2015-02-21 19:21:54 -08:00
Linus Torvalds
18a8d49973 The clock framework changes for 3.20 contain the usual driver additions,
enhancements and fixes mostly for ARM32, ARM64, MIPS and Power-based
 devices. Additionaly the framework core underwent a bit of surgery with
 two major changes. The boundary between the clock core and clock
 providers (e.g clock drivers) is now more well defined with dedicated
 provider helper functions. struct clk no longer maps 1:1 with the
 hardware clock but is a true per-user cookie which helps us tracker
 users of hardware clocks and debug bad behavior. The second major change
 is the addition of rate constraints for clocks. Rate ranges are now
 supported which are analogous to the voltage ranges in the regulator
 framework. Unfortunately these changes to the core created some
 breakeage. We think we fixed it all up but for this reason there are
 lots of last minute commits trying to undo the damage.
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Merge tag 'clk-for-linus-3.20' of git://git.linaro.org/people/mike.turquette/linux

Pull clock framework updates from Mike Turquette:
 "The clock framework changes contain the usual driver additions,
  enhancements and fixes mostly for ARM32, ARM64, MIPS and Power-based
  devices.

  Additionally the framework core underwent a bit of surgery with two
  major changes:

   - The boundary between the clock core and clock providers (e.g clock
     drivers) is now more well defined with dedicated provider helper
     functions.  struct clk no longer maps 1:1 with the hardware clock
     but is a true per-user cookie which helps us tracker users of
     hardware clocks and debug bad behavior.

   - The addition of rate constraints for clocks.  Rate ranges are now
     supported which are analogous to the voltage ranges in the
     regulator framework.

  Unfortunately these changes to the core created some breakeage.  We
  think we fixed it all up but for this reason there are lots of last
  minute commits trying to undo the damage"

* tag 'clk-for-linus-3.20' of git://git.linaro.org/people/mike.turquette/linux: (113 commits)
  clk: Only recalculate the rate if needed
  Revert "clk: mxs: Fix invalid 32-bit access to frac registers"
  clk: qoriq: Add support for the platform PLL
  powerpc/corenet: Enable CLK_QORIQ
  clk: Replace explicit clk assignment with __clk_hw_set_clk
  clk: Add __clk_hw_set_clk helper function
  clk: Don't dereference parent clock if is NULL
  MIPS: Alchemy: Remove bogus args from alchemy_clk_fgcs_detr
  clkdev: Always allocate a struct clk and call __clk_get() w/ CCF
  clk: shmobile: div6: Avoid division by zero in .round_rate()
  clk: mxs: Fix invalid 32-bit access to frac registers
  clk: omap: compile legacy omap3 clocks conditionally
  clkdev: Export clk_register_clkdev
  clk: Add rate constraints to clocks
  clk: remove clk-private.h
  pci: xgene: do not use clk-private.h
  arm: omap2+ remove dead clock code
  clk: Make clk API return per-user struct clk instances
  clk: tegra: Define PLLD_DSI and remove dsia(b)_mux
  clk: tegra: Add support for the Tegra132 CAR IP block
  ...
2015-02-21 12:30:30 -08:00
Alexandre Courbot
23be7fdafa ARM: 8305/1: DMA: Fix kzalloc flags in __iommu_alloc_buffer()
There doesn't seem to be any valid reason to allocate the pages array
with the same flags as the buffer itself. Doing so can eventually lead
to the following safeguard in mm/slab.c's cache_grow() to be hit:

        if (unlikely(flags & GFP_SLAB_BUG_MASK)) {
                pr_emerg("gfp: %un", flags & GFP_SLAB_BUG_MASK);
                BUG();
        }

This happens when buffers are allocated with __GFP_DMA32 or
__GFP_HIGHMEM.

Fix this by allocating the pages array with GFP_KERNEL to follow what is
done elsewhere in this file. Using GFP_KERNEL in __iommu_alloc_buffer()
is safe because atomic allocations are handled by __iommu_alloc_atomic().

Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Marek Szyprowski <m.szyprowski@samsung.com>
Acked-by: Marek Szyprowski <m.szyprowski@samsung.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2015-02-20 11:14:42 +00:00
Uwe Kleine-König
444d2d33d8 ARM: make of_device_ids const
of_device_ids (i.e. compatible strings and the respective data) are not
supposed to change at runtime. All functions working with of_device_ids
provided by <linux/of.h> work with const of_device_ids. So mark the
non-const structs in arch/arm as const, too.

While at it also add some __initconst annotations.

Acked-by: Jason Cooper <jason@lakedameon.net>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2015-02-19 09:44:25 +01:00
Uwe Kleine-König
543c5040f5 ARM: make arrays containing machine compatible strings const
The definition

	static const char *axxia_dt_match[] __initconst = {
		...

defines a changable array of constant strings. That is you must not do:

	*axxia_dt_match[0] = 'k';

but

	axxia_dt_match[0] = "different string";

is fine. So the annotation __initconst is wrong and yields a compiler
error when other really const variables are added with __initconst.

As the struct machine_desc member dt_compat is declared as

	const char *const *dt_compat;

making the arrays const is the better alternative over changing all
annotations to __initdata.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2015-02-19 09:44:17 +01:00
Linus Torvalds
eaa0eda562 asm-generic: uaccess.h cleanup
Like in 3.19, I once more have a multi-stage cleanup for one asm-generic
 header file, this time the work was done by Michael Tsirkin and cleans
 up the uaccess.h file in asm-generic, as well as all architectures for
 which the respective maintainers did not pick up his patches directly.
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Merge tag 'asm-generic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic

Pull asm-generic uaccess.h cleanup from Arnd Bergmann:
 "Like in 3.19, I once more have a multi-stage cleanup for one
  asm-generic header file, this time the work was done by Michael
  Tsirkin and cleans up the uaccess.h file in asm-generic, as well as
  all architectures for which the respective maintainers did not pick up
  his patches directly"

* tag 'asm-generic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic: (37 commits)
  sparc32: nocheck uaccess coding style tweaks
  sparc64: nocheck uaccess coding style tweaks
  xtensa: macro whitespace fixes
  sh: macro whitespace fixes
  parisc: macro whitespace fixes
  m68k: macro whitespace fixes
  m32r: macro whitespace fixes
  frv: macro whitespace fixes
  cris: macro whitespace fixes
  avr32: macro whitespace fixes
  arm64: macro whitespace fixes
  arm: macro whitespace fixes
  alpha: macro whitespace fixes
  blackfin: macro whitespace fixes
  sparc64: uaccess_64 macro whitespace fixes
  sparc32: uaccess_32 macro whitespace fixes
  avr32: whitespace fix
  sh: fix put_user sparse errors
  metag: fix put_user sparse errors
  ia64: fix put_user sparse errors
  ...
2015-02-18 10:02:24 -08:00
Linus Torvalds
ce1d3fde87 Merge branch 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma
Pull dmaengine updates from Vinod Koul:
 "This update brings:

   - the big cleanup up by Maxime for device control and slave
     capabilities.  This makes the API much cleaner.

   - new IMG MDC driver by Andrew

   - new Renesas R-Car Gen2 DMA Controller driver by Laurent along with
     bunch of fixes on rcar drivers

   - odd fixes and updates spread over driver"

* 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma: (130 commits)
  dmaengine: pl330: add DMA_PAUSE feature
  dmaengine: pl330: improve pl330_tx_status() function
  dmaengine: rcar-dmac: Disable channel 0 when using IOMMU
  dmaengine: rcar-dmac: Work around descriptor mode IOMMU errata
  dmaengine: rcar-dmac: Allocate hardware descriptors with DMAC device
  dmaengine: rcar-dmac: Fix oops due to unintialized list in error ISR
  dmaengine: rcar-dmac: Fix spinlock issues in interrupt
  dmaenegine: edma: fix sparse warnings
  dmaengine: rcar-dmac: Fix uninitialized variable usage
  dmaengine: shdmac: extend PM methods
  dmaengine: shdmac: use SET_RUNTIME_PM_OPS()
  dmaengine: pl330: fix bug that cause start the same descs in cyclic
  dmaengine: at_xdmac: allow muliple dwidths when doing slave transfers
  dmaengine: at_xdmac: simplify channel configuration stuff
  dmaengine: at_xdmac: introduce save_cc field
  dmaengine: at_xdmac: wait for in-progress transaction to complete after pausing a channel
  ioat: fail self-test if wait_for_completion times out
  dmaengine: dw: define DW_DMA_MAX_NR_MASTERS
  dmaengine: dw: amend description of dma_dev field
  dmatest: move src_off, dst_off, len inside loop
  ...
2015-02-18 08:49:20 -08:00
Paul Bolle
d88d6cfc91 ARM: mm: Remove Kconfig symbol CACHE_PL310
Commit 20e783e39e ("ARM: 8296/1: cache-l2x0: clean up aurora cache
handling") removed the only user of the Kconfig symbol CACHE_PL310.
Setting CACHE_PL310 is now pointless. Remove its Kconfig entry, and one
select of this symbol.

Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2015-02-18 12:24:29 +01:00
Arnd Bergmann
f495fe8998 Merge tag 'arm-soc/for-3.20/dts' of http://github.com/broadcom/stblinux into fixes
This pull request contains the following Broadcom SoCs Device Tree changes:

- Ray adds support for the Cygnus i2c Device Tree controller on Cygnus SoCs
- Fixes to the BCM63138 dtsi file for the L2 cache controller properties

* tag 'arm-soc/for-3.20/dts' of http://github.com/broadcom/stblinux:
  ARM: dts: add I2C device nodes for Broadcom Cygnus
  ARM: dts: BCM63xx: fix L2 cache properties
2015-02-18 12:21:54 +01:00
Arnd Bergmann
d1bef995f6 ARM: rockchip: force built-in regulator support for PM
The rockchips suspend/resume code requires regulators to work,
and gives a compile-time error if they are not available:

arch/arm/mach-rockchip/built-in.o: In function `rk3288_suspend_finish':
:(.text+0x146): undefined reference to `regulator_suspend_finish'
arch/arm/mach-rockchip/built-in.o: In function `rk3288_suspend_prepare':
:(.text+0x18e): undefined reference to `regulator_suspend_prepare'

To solve this, we now enable regulators whenever they are needed,
which is what we do on a lot of other platforms as well.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2015-02-18 12:20:30 +01:00
Arnd Bergmann
165235180f ARM: mvebu: build armada375-smp code conditionally
mvebu_armada375_smp_wa_init is only used on armada 375 but is defined
for all mvebu machines. As it calls a function that is only provided
sometimes, this can result in a link error:

arch/arm/mach-mvebu/built-in.o: In function `mvebu_armada375_smp_wa_init':
:(.text+0x228): undefined reference to `mvebu_setup_boot_addr_wa'

To solve this, we can just change the existing #ifdef around the
function to also check for Armada375 SMP platforms.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Fixes: 305969fb62 ("ARM: mvebu: use the common function for Armada 375 SMP workaround")
Cc: Andrew Lunn <andrew@lunn.ch>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Gregory Clement <gregory.clement@free-electrons.com>
2015-02-18 12:20:29 +01:00
Arnd Bergmann
1fd01aa217 ARM: sti: always enable RESET_CONTROLLER
A lot of the sti device drivers require reset controller support,
but do not all have individual 'depends on RESET_CONTROLLER'
statements. Using 'select' here once avoids a lot of build errors
resulting from this.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Maxime Coquelin <maxime.coquelin@st.com>
Acked-by: Patrice Chotard <patrice.chotard@st.com>
Cc: Srinivas Kandagatla <srinivas.kandagatla@gmail.com>
2015-02-18 12:20:29 +01:00
Arnd Bergmann
c8823e7a9e ARM: rockchip: make rockchip_suspend_init conditional
If CONFIG_PM_SLEEP is disabled, we get a build error for rockchips:

arch/arm/mach-rockchip/built-in.o: In function `rockchip_dt_init':
:(.init.text+0x1c): undefined reference to `rockchip_suspend_init'

This adds an inline alternative for that case.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
Cc: linux-rockchip@lists.infradead.org
2015-02-18 12:20:28 +01:00
Arnd Bergmann
1aeb3c5c48 ARM: ixp4xx: fix {in,out}s{bwl} data types
Most platforms use void pointer arguments in these functions, but
ixp4xx does not, which triggers lots of warnings in device drivers like:

net/ethernet/8390/ne2k-pci.c: In function 'ne2k_pci_get_8390_hdr':
net/ethernet/8390/ne2k-pci.c:503:3: warning: passing argument 2 of 'insw' from incompatible pointer type
   insw(NE_BASE + NE_DATAPORT, hdr, sizeof(struct e8390_pkt_hdr)>>1);
   ^
In file included from include/asm/io.h:214:0,
                 from /git/arm-soc/include/linux/io.h:22,
                 from /git/arm-soc/include/linux/pci.h:31,
                 from net/ethernet/8390/ne2k-pci.c:48:
mach-ixp4xx/include/mach/io.h:316:91: note: expected 'u16 *' but argument is of type 'struct e8390_pkt_hdr *'
 static inline void insw(u32 io_addr, u16 *vaddr, u32 count)

Fixing the drivers seems hopeless, so this changes the ixp4xx code
to do the same as the others to avoid the warnings.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Krzysztof Halasa <khalasa@piap.pl>
Cc: Imre Kaloz <kaloz@openwrt.org>
2015-02-18 12:20:27 +01:00
Arnd Bergmann
d76f733dda ARM: prima2: do not select SMP_ON_UP
The new Atlas7 platform implicitly selects 'CONFIG_SMP_ON_UP',
which leads to problems if we enable building the platform without
MMU, as that combination is not allowed and causes a link error:

arch/arm/kernel/built-in.o: In function `c_show':
:(.text+0x1872): undefined reference to `smp_on_up'
:(.text+0x1876): undefined reference to `smp_on_up'
arch/arm/kernel/built-in.o: In function `arch_irq_work_raise':
:(.text+0x3d48): undefined reference to `smp_on_up'
:(.text+0x3d4c): undefined reference to `smp_on_up'
arch/arm/kernel/built-in.o: In function `smp_setup_processor_id':
:(.init.text+0x180): undefined reference to `smp_on_up'

This removes the 'select' statement.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Fixes: 4cba058526 ("ARM: sirf: add Atlas7 machine support")
Acked-by: Barry Song <Baohua.Song@csr.com>
Cc: Zhiwu Song <Zhiwu.Song@csr.com>
2015-02-18 12:20:27 +01:00
Arnd Bergmann
a91c5824dd ARM: at91: fix pm declarations
In a recent rearrangement of the at91 pm initialization code, a broken
set of declarations was added for the !CONFIG_PM-case, leading to
this link error:

arch/arm/mach-at91/board-dt-sama5.o: In function `at91_rm9200_pm_init':
arch/arm/mach-at91/generic.h:40: multiple definition of `at91_rm9200_pm_init'
arch/arm/mach-at91/setup.o:arch/arm/mach-at91/generic.h:40: first defined here
arch/arm/mach-at91/board-dt-sama5.o: In function `at91_sam9260_pm_init':
arch/arm/mach-at91/generic.h:41: multiple definition of `at91_sam9260_pm_init'
arch/arm/mach-at91/setup.o:arch/arm/mach-at91/generic.h:41: first defined here
arch/arm/mach-at91/board-dt-sama5.o: In function `at91_sam9g45_pm_init':
arch/arm/mach-at91/generic.h:42: multiple definition of `at91_sam9g45_pm_init'
arch/arm/mach-at91/setup.o:arch/arm/mach-at91/generic.h:42: first defined here

This adds the missing 'static inline' to the declarations to avoid
creating a copy of the functions in each file that includes the
header.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Fixes: 4db0ba22da ("ARM: at91: pm: prepare for multiplatform")
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Cc: Jean-Christophe Plagniol-Villard <plagnioj@jcrosoft.com>
Cc: Alexandre Belloni <alexandre.belloni@free-electrons.com>
2015-02-18 12:20:26 +01:00
Arnd Bergmann
99bd667a34 ARM: davinci: multi-soc kernels require AUTO_ZRELADDR
The davinci DA8xx and DMx families have incompatible zreladdr
settings, and attempting to build a kernel with both enabled
results in an error unless AUTO_ZRELADDR is set:

multiple zreladdrs: 0xc0008000 0x80008000
This needs CONFIG_AUTO_ZRELADDR to be set

This patch changes Kconfig to make the two families mutually
exclusive when this is unset.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Sekhar Nori <nsekhar@ti.com>
Cc: Kevin Hilman <khilman@deeprootsystems.com>
2015-02-18 12:20:25 +01:00
Arnd Bergmann
31612d6484 ARM: davinci: davinci_cfg_reg cannot be init
davinci_cfg_reg gets called from a lot of locations that
might get called after the init section has been discarded,
so the function itself must not be marked __init either.

The kernel build currently warns about this with lots of
messages like:

WARNING: vmlinux.o(.text.unlikely+0x24c): Section mismatch in reference from the function dm365evm_mmc_configure() to the function .init.text:davinci_cfg_reg()
The function dm365evm_mmc_configure() references
the function __init davinci_cfg_reg().
This is often because dm365evm_mmc_configure lacks a __init
annotation or the annotation of davinci_cfg_reg is wrong.

This removes the extraneous __init_or_module annotation.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Sekhar Nori <nsekhar@ti.com>
Cc: Kevin Hilman <khilman@deeprootsystems.com>
2015-02-18 12:20:25 +01:00
Arnd Bergmann
ff34cae5b4 ARM: BCM: put back ARCH_MULTI_V7 dependency for mobile
A recent cleanup rearranged the Kconfig file for mach-bcm and
accidentally dropped the dependency on ARCH_MULTI_V7, which
makes it possible to now build the two mobile SoC platforms
on an ARMv6-only kernel, resulting in a log of Kconfig
warnings like

warning: ARCH_BCM_MOBILE selects ARM_ERRATA_775420 which has unmet direct dependencies (CPU_V7)

and which of course cannot work on any machine.

This puts back the dependencies as before.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Fixes: 64e74aa788 ("ARM: mach-bcm: ARCH_BCM_MOBILE: remove one level of menu from Kconfig")
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Acked-by: Scott Branden <sbranden@broadcom.com>
2015-02-18 12:20:08 +01:00
Arnd Bergmann
95fcedb027 ARM: vexpress: use ARM_CPU_SUSPEND if needed
The vexpress tc2 power management code calls mcpm_loopback, which
is only available if ARM_CPU_SUSPEND is enabled, otherwise we
get a link error:

arch/arm/mach-vexpress/built-in.o: In function `tc2_pm_init':
arch/arm/mach-vexpress/tc2_pm.c:389: undefined reference to `mcpm_loopback'

This explicitly selects ARM_CPU_SUSPEND like other platforms that
need it.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Fixes: 3592d7e002 ("ARM: 8082/1: TC2: test the MCPM loopback during boot")
Acked-by: Nicolas Pitre <nico@linaro.org>
Acked-by: Liviu Dudau <liviu.dudau@arm.com>
Cc: Kevin Hilman <khilman@linaro.org>
Cc: Sudeep Holla <sudeep.holla@arm.com>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
2015-02-18 12:19:09 +01:00