Commit Graph

77560 Commits

Author SHA1 Message Date
Christoffer Dall
f7ed45be3b KVM: ARM: World-switch implementation
Provides complete world-switch implementation to switch to other guests
running in non-secure modes. Includes Hyp exception handlers that
capture necessary exception information and stores the information on
the VCPU and KVM structures.

The following Hyp-ABI is also documented in the code:

Hyp-ABI: Calling HYP-mode functions from host (in SVC mode):
   Switching to Hyp mode is done through a simple HVC #0 instruction. The
   exception vector code will check that the HVC comes from VMID==0 and if
   so will push the necessary state (SPSR, lr_usr) on the Hyp stack.
   - r0 contains a pointer to a HYP function
   - r1, r2, and r3 contain arguments to the above function.
   - The HYP function will be called with its arguments in r0, r1 and r2.
   On HYP function return, we return directly to SVC.

A call to a function executing in Hyp mode is performed like the following:

        <svc code>
        ldr     r0, =BSYM(my_hyp_fn)
        ldr     r1, =my_param
        hvc #0  ; Call my_hyp_fn(my_param) from HYP mode
        <svc code>

Otherwise, the world-switch is pretty straight-forward. All state that
can be modified by the guest is first backed up on the Hyp stack and the
VCPU values is loaded onto the hardware. State, which is not loaded, but
theoretically modifiable by the guest is protected through the
virtualiation features to generate a trap and cause software emulation.
Upon guest returns, all state is restored from hardware onto the VCPU
struct and the original state is restored from the Hyp-stack onto the
hardware.

SMP support using the VMPIDR calculated on the basis of the host MPIDR
and overriding the low bits with KVM vcpu_id contributed by Marc Zyngier.

Reuse of VMIDs has been implemented by Antonios Motakis and adapated from
a separate patch into the appropriate patches introducing the
functionality. Note that the VMIDs are stored per VM as required by the ARM
architecture reference manual.

To support VFP/NEON we trap those instructions using the HPCTR. When
we trap, we switch the FPU.  After a guest exit, the VFP state is
returned to the host.  When disabling access to floating point
instructions, we also mask FPEXC_EN in order to avoid the guest
receiving Undefined instruction exceptions before we have a chance to
switch back the floating point state.  We are reusing vfp_hard_struct,
so we depend on VFPv3 being enabled in the host kernel, if not, we still
trap cp10 and cp11 in order to inject an undefined instruction exception
whenever the guest tries to use VFP/NEON. VFP/NEON developed by
Antionios Motakis and Rusty Russell.

Aborts that are permission faults, and not stage-1 page table walk, do
not report the faulting address in the HPFAR.  We have to resolve the
IPA, and store it just like the HPFAR register on the VCPU struct. If
the IPA cannot be resolved, it means another CPU is playing with the
page tables, and we simply restart the guest.  This quirk was fixed by
Marc Zyngier.

Reviewed-by: Will Deacon <will.deacon@arm.com>
Reviewed-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Antonios Motakis <a.motakis@virtualopensystems.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <c.dall@virtualopensystems.com>
2013-01-23 13:29:12 -05:00
Christoffer Dall
86ce85352f KVM: ARM: Inject IRQs and FIQs from userspace
All interrupt injection is now based on the VM ioctl KVM_IRQ_LINE.  This
works semantically well for the GIC as we in fact raise/lower a line on
a machine component (the gic).  The IOCTL uses the follwing struct.

struct kvm_irq_level {
	union {
		__u32 irq;     /* GSI */
		__s32 status;  /* not used for KVM_IRQ_LEVEL */
	};
	__u32 level;           /* 0 or 1 */
};

ARM can signal an interrupt either at the CPU level, or at the in-kernel irqchip
(GIC), and for in-kernel irqchip can tell the GIC to use PPIs designated for
specific cpus.  The irq field is interpreted like this:

  bits:  | 31 ... 24 | 23  ... 16 | 15    ...    0 |
  field: | irq_type  | vcpu_index |   irq_number   |

The irq_type field has the following values:
- irq_type[0]: out-of-kernel GIC: irq_number 0 is IRQ, irq_number 1 is FIQ
- irq_type[1]: in-kernel GIC: SPI, irq_number between 32 and 1019 (incl.)
               (the vcpu_index field is ignored)
- irq_type[2]: in-kernel GIC: PPI, irq_number between 16 and 31 (incl.)

The irq_number thus corresponds to the irq ID in as in the GICv2 specs.

This is documented in Documentation/kvm/api.txt.

Reviewed-by: Will Deacon <will.deacon@arm.com>
Reviewed-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Christoffer Dall <c.dall@virtualopensystems.com>
2013-01-23 13:29:12 -05:00
Christoffer Dall
d5d8184d35 KVM: ARM: Memory virtualization setup
This commit introduces the framework for guest memory management
through the use of 2nd stage translation. Each VM has a pointer
to a level-1 table (the pgd field in struct kvm_arch) which is
used for the 2nd stage translations. Entries are added when handling
guest faults (later patch) and the table itself can be allocated and
freed through the following functions implemented in
arch/arm/kvm/arm_mmu.c:
 - kvm_alloc_stage2_pgd(struct kvm *kvm);
 - kvm_free_stage2_pgd(struct kvm *kvm);

Each entry in TLBs and caches are tagged with a VMID identifier in
addition to ASIDs. The VMIDs are assigned consecutively to VMs in the
order that VMs are executed, and caches and tlbs are invalidated when
the VMID space has been used to allow for more than 255 simultaenously
running guests.

The 2nd stage pgd is allocated in kvm_arch_init_vm(). The table is
freed in kvm_arch_destroy_vm(). Both functions are called from the main
KVM code.

We pre-allocate page table memory to be able to synchronize using a
spinlock and be called under rcu_read_lock from the MMU notifiers.  We
steal the mmu_memory_cache implementation from x86 and adapt for our
specific usage.

We support MMU notifiers (thanks to Marc Zyngier) through
kvm_unmap_hva and kvm_set_spte_hva.

Finally, define kvm_phys_addr_ioremap() to map a device at a guest IPA,
which is used by VGIC support to map the virtual CPU interface registers
to the guest. This support is added by Marc Zyngier.

Reviewed-by: Will Deacon <will.deacon@arm.com>
Reviewed-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <c.dall@virtualopensystems.com>
2013-01-23 13:29:11 -05:00
Christoffer Dall
342cd0ab0e KVM: ARM: Hypervisor initialization
Sets up KVM code to handle all exceptions taken to Hyp mode.

When the kernel is booted in Hyp mode, calling an hvc instruction with r0
pointing to the new vectors, the HVBAR is changed to the the vector pointers.
This allows subsystems (like KVM here) to execute code in Hyp-mode with the
MMU disabled.

We initialize other Hyp-mode registers and enables the MMU for Hyp-mode from
the id-mapped hyp initialization code. Afterwards, the HVBAR is changed to
point to KVM Hyp vectors used to catch guest faults and to switch to Hyp mode
to perform a world-switch into a KVM guest.

Also provides memory mapping code to map required code pages, data structures,
and I/O regions  accessed in Hyp mode at the same virtual address as the host
kernel virtual addresses, but which conforms to the architectural requirements
for translations in Hyp mode. This interface is added in arch/arm/kvm/arm_mmu.c
and comprises:
 - create_hyp_mappings(from, to);
 - create_hyp_io_mappings(from, to, phys_addr);
 - free_hyp_pmds();

Reviewed-by: Will Deacon <will.deacon@arm.com>
Reviewed-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <c.dall@virtualopensystems.com>
2013-01-23 13:29:10 -05:00
Christoffer Dall
749cf76c5a KVM: ARM: Initial skeleton to compile KVM support
Targets KVM support for Cortex A-15 processors.

Contains all the framework components, make files, header files, some
tracing functionality, and basic user space API.

Only supported core is Cortex-A15 for now.

Most functionality is in arch/arm/kvm/* or arch/arm/include/asm/kvm_*.h.

Reviewed-by: Will Deacon <will.deacon@arm.com>
Reviewed-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <c.dall@virtualopensystems.com>
2013-01-23 13:29:10 -05:00
Christoffer Dall
9e9a367c29 ARM: Section based HYP idmap
Add a method (hyp_idmap_setup) to populate a hyp pgd with an
identity mapping of the code contained in the .hyp.idmap.text
section.

Offer a method to drop this identity mapping through
hyp_idmap_teardown.

Make all the above depend on CONFIG_ARM_VIRT_EXT and CONFIG_ARM_LPAE.

Reviewed-by: Will Deacon <will.deacon@arm.com>
Reviewed-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <c.dall@virtualopensystems.com>
2013-01-23 13:29:09 -05:00
Christoffer Dall
cc577c26e2 ARM: Add page table and page defines needed by KVM
KVM uses the stage-2 page tables and the Hyp page table format,
so we define the fields and page protection flags needed by KVM.

The nomenclature is this:
 - page_hyp:        PL2 code/data mappings
 - page_hyp_device: PL2 device mappings (vgic access)
 - page_s2:         Stage-2 code/data page mappings
 - page_s2_device:  Stage-2 device mappings (vgic access)

Reviewed-by: Will Deacon <will.deacon@arm.com>
Reviewed-by: Marcelo Tosatti <mtosatti@redhat.com>
Christoffer Dall <c.dall@virtualopensystems.com>
2013-01-23 13:29:08 -05:00
Mark Rutland
9dcbf46655 ARM: perf: simplify __hw_perf_event_init err handling
Currently __hw_perf_event_init has an err variable that's ignored right
until the end, where it's initialised, conditionally set, and then used
as a boolean flag deciding whether to return another error code.

This patch removes the err variable and simplifies the associated error
handling logic.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
2013-01-18 16:54:30 +00:00
Mark Rutland
8f3b90b585 ARM: perf: remove unnecessary checks for idx < 0
We currently check for hwx->idx < 0 in armpmu_read and armpmu_del
unnecessarily. The only case where hwc->idx < 0 is when armpmu_add
fails, in which case the event's state is set to
PERF_EVENT_STATE_INACTIVE.

The perf core will not attempt to read from an event in
PERF_EVENT_STATE_INACTIVE, and so the check in armpmu_read is
unnecessary. Similarly, if perf core cannot add an event it will not
attempt to delete it, so the WARN_ON in armpmu_del is unnecessary.

This patch removes these two redundant checks.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
2013-01-18 13:46:09 +00:00
Mark Rutland
76b8a0e4c8 ARM: perf: handle armpmu_register failing
Currently perf_pmu_register may fail for several reasons (e.g. being
unable to allocate memory for the struct device it associates with each
PMU), and while any error is propagated by armpmu_register, it is
ignored by cpu_pmu_device_probe and not propagated to the caller.  This
also results in a leak of a struct arm_pmu.

This patch adds cleanup if armpmu_register fails, and updates the info
messages to better differentiate this type of failure from a failure to
probe the PMU type from the hardware or dt.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
2013-01-18 13:46:09 +00:00
Will Deacon
40c390c768 ARM: perf: don't pretend to support counting of L1I writes
ARM has a harvard cache architecture and cannot write directly to the
I-side.

This patch removes the L1I write events from the cache map (which
previously returned *read* events in many cases).

Reported-by: Mike Williams <michael.williams@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
2013-01-16 12:01:59 +00:00
Will Deacon
1764c591df ARM: perf: remove redundant NULL check on cpu_pmu
cpu_pmu has already been dereferenced before we consider invoking the
->reset function, so remove the redundant NULL check.

Reported-by: Cong Ding <dinggnu@gmail.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
2013-01-14 17:40:38 +00:00
Christoffer Dall
3b953c9c15 ARM: Use implementor and part defines from cputype.h
Instead of decoding implementor numbers, part numbers and Xscale
architecture masks inline in the pmu probing function, use defines
and accessor functions from cputype.h, which can also be shared by
other subsystems, such as KVM.

Signed-off-by: Christoffer Dall <c.dall@virtualopensystems.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
2013-01-11 14:56:31 +00:00
Christoffer Dall
59530adc3f ARM: Define CPU part numbers and implementors
Define implementor IDs, part numbers and Xscale architecture versions in
cputype.h.  Also create accessor functions for reading the implementor,
part number, and Xscale architecture versions from the CPUID regiser.

Signed-off-by: Christoffer Dall <c.dall@virtualopensystems.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
2013-01-11 14:56:30 +00:00
Linus Torvalds
5c49985c21 Merge branch 'fixes' of git://git.linaro.org/people/rmk/linux-arm
Pull ARM fixes from Russell King.

* 'fixes' of git://git.linaro.org/people/rmk/linux-arm:
  ARM: 7616/1: cache-l2x0: aurora: Use writel_relaxed instead of writel
  ARM: 7615/1: cache-l2x0: aurora: Invalidate during clean operation with WT enable
  ARM: 7614/1: mm: fix wrong branch from Cortex-A9 to PJ4b
  ARM: 7612/1: imx: Do not select some errata that depends on !ARCH_MULTIPLATFORM
  ARM: 7611/1: VIC: fix bug in VIC irqdomain code
  ARM: 7610/1: versatile: bump IRQ numbers
  ARM: 7609/1: disable errata work-arounds which access secure registers
  ARM: 7608/1: l2x0: Only set .set_debug on PL310 r3p0 and earlier
2013-01-09 08:58:57 -08:00
Linus Torvalds
974b33586b ARM: arm-soc fixes for 3.8-rc
People are back from the holiday breaks, and it shows. Here are a bunch of
 fixes for a number of platforms:
  - A couple of small fixes for Nomadik
  - A larger set of changes for kirkwood/mvebu
    - uart driver selection, dt clocks, gpio-poweroff fixups,
      a few __init annotation fixes and some error handling improvement
      in their xor dma driver.
  - i.MX had a couple of minor fixes (and a critical one for flexcan2
    clock setup)
  - MXS has a small board fix and a framebuffer bugfix
  - A set of fixes for Samsung Exynos, fixing default bootargs and some
    Exynos5440 clock issues
  - A set of OMAP changes including PM fixes and a few sparse warning
    fixups
 
 All in all a bit more positive code delta than we'd ideally want to see
 here, mostly from the OMAP PM changes, but nothing overly crazy.
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Merge tag 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull ARM SoC fixes from Olof Johansson:
 "People are back from the holiday breaks, and it shows.  Here are a
  bunch of fixes for a number of platforms:
   - A couple of small fixes for Nomadik
   - A larger set of changes for kirkwood/mvebu
     - uart driver selection, dt clocks, gpio-poweroff fixups, a few
       __init annotation fixes and some error handling improvement in
       their xor dma driver.
   - i.MX had a couple of minor fixes (and a critical one for flexcan2
     clock setup)
   - MXS has a small board fix and a framebuffer bugfix
   - A set of fixes for Samsung Exynos, fixing default bootargs and some
     Exynos5440 clock issues
   - A set of OMAP changes including PM fixes and a few sparse warning
     fixups

  All in all a bit more positive code delta than we'd ideally want to
  see here, mostly from the OMAP PM changes, but nothing overly crazy."

* tag 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (44 commits)
  ARM: clps711x: Fix bad merge of clockevents setup
  ARM: highbank: save and restore L2 cache and GIC on suspend
  ARM: highbank: add a power request clear
  ARM: highbank: fix secondary boot and hotplug
  ARM: highbank: fix typos with hignbank in power request functions
  ARM: dts: fix highbank cpu mpidr values
  ARM: dts: add device_type prop to cpu nodes on Calxeda platforms
  ARM: mx5: Fix MX53 flexcan2 clock
  ARM: OMAP2+: am33xx-hwmod: Fix wrongly terminated am33xx_usbss_mpu_irqs array
  pinctrl: mvebu: make pdma clock on dove mandatory
  ARM: Dove: Add pinctrl clock to DT
  dma: mv_xor: fix error handling for clocks
  dma: mv_xor: fix error handling of mv_xor_channel_add()
  arm: mvebu: Add missing ; for cpu node.
  arm: mvebu: Armada XP MV78230 has only three Ethernet interfaces
  arm: mvebu: Armada XP MV78230 has two cores, not one
  clk: mvebu: Remove inappropriate __init tagging
  ARM: Kirkwood: Use fixed-regulator instead of board gpio call
  ARM: Kirkwood: Fix missing sdio clock
  ARM: Kirkwood: Switch TWSI1 of 88f6282 to DT clock providers
  ...
2013-01-08 18:53:56 -08:00
Olof Johansson
434fec1694 The biggest change is a fix to deal with different power state
on omap2 registers that causes issues trying to use common PM code.
 Also fix few incorrect registers, and an issue for omap1 USB, and
 few sparse fixes for issues that sneaked in with all the clean-up.
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Merge tag 'omap-for-v3.8-rc2/fixes-signed-v2' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into fixes

From Tony Lindgren:
The biggest change is a fix to deal with different power state
on omap2 registers that causes issues trying to use common PM code.
Also fix few incorrect registers, and an issue for omap1 USB, and
few sparse fixes for issues that sneaked in with all the clean-up.

* tag 'omap-for-v3.8-rc2/fixes-signed-v2' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap:
  ARM: OMAP2+: am33xx-hwmod: Fix wrongly terminated am33xx_usbss_mpu_irqs array
  ARM: OMAP1: fix USB configuration use-after-release
  ARM: OMAP2/3: PRM: fix bogus OMAP2xxx powerstate return values
  ARM: OMAP3: clock data: Add missing enable/disable for EMU clock
  ARM: OMAP4: PRM: Correct wrong instance usage for reading reset sources
  ARM: OMAP4: PRM: fix RSTTIME and RSTST offsets
  ARM: OMAP4: PRM: Correct reset source map
  ARM: OMAP: SRAM: resolve sparse warnings
  ARM: OMAP AM33xx: hwmod data: resolve sparse warnings
  ARM: OMAP: 32k counter: resolve sparse warnings

Signed-off-by: Olof Johansson <olof@lixom.net>
2013-01-08 09:50:04 -08:00
Olof Johansson
2f64a8d7b2 Merge branch 'v3.8-samsung-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung into fixes
From Kukjin Kim:
Most of them are EXYNOS5440 fixes which are for changing uart console,
cpu id (typo)  and silent complaining gpio error in kernel boot.

* 'v3.8-samsung-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung:
  ARM: EXYNOS: skip the clock initialization for exynos5440
  ARM: EXYNOS: enable PINCTRL for EXYNOS5440
  ARM: dts: use uart port1 for console on exynos4210-smdkv310
  ARM: dts: use uart port0 for console on exynos5440-ssdk5440
  ARM: SAMSUNG: fix the cpu id for EXYNOS5440
  ARM: EXYNOS: Revise HDMI resource size
2013-01-08 09:42:52 -08:00
Olof Johansson
5595e755b6 I have to send one critical mxsfb fix through arm-soc, as FB maintainer
is unresponsive for quite a while.  People start complaining the missing
 of such an important fix.
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Merge tag 'mxs-fixes-3.8' of git://git.linaro.org/people/shawnguo/linux-2.6 into fixes

From Shawn Guo:
I have to send one critical mxsfb fix through arm-soc, as FB maintainer
is unresponsive for quite a while.  People start complaining the missing
of such an important fix.

* tag 'mxs-fixes-3.8' of git://git.linaro.org/people/shawnguo/linux-2.6:
  video: mxsfb: fix crash when unblanking the display
  ARM: dts: imx23-olinuxino: Fix IOMUX settings
2013-01-08 08:39:27 -08:00
Olof Johansson
2d9e02cad6 It includes one critical fix - wrong flexcan2 clock will hang system
when the port gets brought up.  The other two are non-critical fixes,
 which are sent together here, since it's still early -rc stage.
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Merge tag 'imx-fixes-3.8' of git://git.linaro.org/people/shawnguo/linux-2.6 into fixes

From Shawn Guo:

It includes one critical fix - wrong flexcan2 clock will hang system
when the port gets brought up.  The other two are non-critical fixes,
which are sent together here, since it's still early -rc stage.

* tag 'imx-fixes-3.8' of git://git.linaro.org/people/shawnguo/linux-2.6:
  ARM: mx5: Fix MX53 flexcan2 clock
  ARM: dts: imx31-bug: Fix manufacturer compatible string
  clk: imx: Remove 'clock-output-names' from the examples
2013-01-08 08:39:00 -08:00
Olof Johansson
5cf87a12ca fixes for mvebu/kirkwood v3.8
- use correct uart driver for mvebu boards
  - add a missing DT clocks
  - gpio-poweroff level vs. edge triggering, use gpio_is_valid()
  - remove an inappropriate __init, modules need to access function.
  - various DT fixes
  - error handling in mv_xor
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Merge tag 'mvebu_fixes_for_v3.8' of git://git.infradead.org/users/jcooper/linux into fixes

From Jason Cooper:

fixes for mvebu/kirkwood v3.8
 - use correct uart driver for mvebu boards
 - add a missing DT clocks
 - gpio-poweroff level vs. edge triggering, use gpio_is_valid()
 - remove an inappropriate __init, modules need to access function.
 - various DT fixes
 - error handling in mv_xor

* tag 'mvebu_fixes_for_v3.8' of git://git.infradead.org/users/jcooper/linux:
  pinctrl: mvebu: make pdma clock on dove mandatory
  ARM: Dove: Add pinctrl clock to DT
  dma: mv_xor: fix error handling for clocks
  dma: mv_xor: fix error handling of mv_xor_channel_add()
  arm: mvebu: Add missing ; for cpu node.
  arm: mvebu: Armada XP MV78230 has only three Ethernet interfaces
  arm: mvebu: Armada XP MV78230 has two cores, not one
  clk: mvebu: Remove inappropriate __init tagging
  ARM: Kirkwood: Use fixed-regulator instead of board gpio call
  ARM: Kirkwood: Fix missing sdio clock
  ARM: Kirkwood: Switch TWSI1 of 88f6282 to DT clock providers
  Power: gpio-poweroff: Fix documentation and gpio_is_valid
  ARM: Kirkwood: Fix missing clk for USB device.
  arm: mvebu: Use dw-apb-uart instead of ns16650 as UART driver

Signed-off-by: Olof Johansson <olof@lixom.net>
2013-01-07 21:11:12 -08:00
Olof Johansson
0e3a4a2eb6 ARM: clps711x: Fix bad merge of clockevents setup
I mismerged a previous branch from Alexander, and accidentally left
in ARCH_USES_GETTIMEOFFSET. Remove it.

Signed-off-by: Olof Johansson <olof@lixom.net>
Cc: Alexander Shiyan <shc_work@mail.ru>
2013-01-07 21:08:27 -08:00
Olof Johansson
daaeec936f Merge tag 'nomadik-fixes-for-arm-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-nomadik into fixes
From Linus Walleij:
Two fixes to the Nomadik:
- Delete a dangling include
- Bump IRQ numbers to offset at 32

* tag 'nomadik-fixes-for-arm-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-nomadik:
  ARM: nomadik: bump the IRQ numbers again
  ARM: nomadik: delete dangling include
2013-01-07 21:08:26 -08:00
Rob Herring
1ddda1cd23 ARM: highbank: save and restore L2 cache and GIC on suspend
This fixes suspend to RAM adding necessary save and restore of L2 and GIC.

Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
2013-01-07 21:08:26 -08:00
Rob Herring
9852910a0b ARM: highbank: add a power request clear
When we fail to power down, we need to clear out the power request.

Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
2013-01-07 21:08:25 -08:00
Rob Herring
0b3455a71e ARM: highbank: fix secondary boot and hotplug
With commit 384a290 (ARM: gic: use a private mapping for CPU target
interfaces), wake-up IPIs now go to all cores as the gic cpu interface
numbering may not follow core numbering. This broke secondary boot on
highbank since the boot address was already set for all secondary cores,
this caused all cores to boot before the kernel was ready.

Fix this by moving the setting of the jump address to
highbank_boot_secondary instead of highbank_smp_prepare_cpus and
highbank_cpu_die. Also, clear the address when we boot. This prevents
cores from booting before they are actually triggered and is also necessary
to get suspend/resume to work.

Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Cc: Nicolas Pitre <nicolas.pitre@linaro.org>
Signed-off-by: Olof Johansson <olof@lixom.net>
2013-01-07 21:08:25 -08:00
Rob Herring
c05ee88f6f ARM: highbank: fix typos with hignbank in power request functions
s/hignbank/highbank/

Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
2013-01-07 21:08:24 -08:00
Rob Herring
3943deedda ARM: dts: fix highbank cpu mpidr values
With the addition of commit a0ae0240 (ARM: kernel: add device tree init
map function), the cpu reg values must match the cpu mpidr register or we'll
get warnings. For some reason, the CLUSTERID on highbank is 9, so the reg
value needs to be 0x90n to quiet the warnings.

Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
2013-01-07 21:08:23 -08:00
Rob Herring
36ff67bc94 ARM: dts: add device_type prop to cpu nodes on Calxeda platforms
While device_type is considered deprecated, it is still needed for tools
like lshw to identify cpu nodes.

Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
2013-01-07 21:08:23 -08:00
Marek Vasut
e37f0d5b32 ARM: mx5: Fix MX53 flexcan2 clock
The second FlexCAN port uses different clock than the first one, configure
correct clock to prevent hanging of the system during bringing up of the port.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Fabio Estevam <fabio.estevam@freescale.com>
Acked-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
2013-01-08 08:53:07 +08:00
Pantelis Antoniou
6adba67eb0 ARM: OMAP2+: am33xx-hwmod: Fix wrongly terminated am33xx_usbss_mpu_irqs array
The IRQ array must be terminated by -1 and not by -1+OMAP_INTC_START
This led to having a resource list of 100s of IRQs.

Looks like this was caused by commit a2cfc509 (ARM: OMAP3+: hwmod: Add
AM33XX HWMOD data) that probably had some search and replace updates
done for the patch for sparse irq support.

Signed-off-by: Pantelis Antoniou <panto@antoniou-consulting.com>
Acked-by: Paul Walmsley <paul@pwsan.com>
[tony@atomide.com: updated wit information about the breaking commit]
Signed-off-by: Tony Lindgren <tony@atomide.com>
2013-01-07 12:38:07 -08:00
Sebastian Hesselbarth
db7d77e6a7 ARM: Dove: Add pinctrl clock to DT
During merge of the mvebu patches a clock gate for pinctrl was
lost. This patch just readds the clock gate.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
2013-01-07 16:18:57 +00:00
Linus Torvalds
5ce2955e04 Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus
Pull MIPS fixes from Ralf Baechle:
 "Various fixes across the tree.  The modpost error due to
  virt_addr_valid() not being usable from modules required a number of
  preparatory cleanups so a clean fix was possible."

* 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus:
  MIPS: 64-bit: Fix build if !CONFIG_MODULES
  MIPS: Wire up finit_module syscall.
  MIPS: Fix modpost error in modules attepting to use virt_addr_valid().
  MIPS: page.h: Remove now unnecessary #ifndef __ASSEMBLY__ wrapper.
  MIPS: Switch remaining assembler PAGE_SIZE users to <asm/asm-offsets.h>.
  MIPS: Include PAGE_S{IZE,HIFT} in <asm/offset.h>.
  MIPS: Don't include <asm/page.h> unnecessarily.
  MIPS: Fix comment.
  Revert "MIPS: Optimise TLB handlers for MIPS32/64 R2 cores."
  MIPS: perf: Fix build failure in XLP perf support.
  MIPS: Alchemy: Make 32kHz and r4k timer coexist peacefully
2013-01-07 07:50:41 -08:00
Linus Torvalds
de9ac5cea3 Merge branch 'next' of git://git.monstr.eu/linux-2.6-microblaze
Pull microblaze update from Michal Simek:
 "This fixes noMMU kernel and I have also added defconfig updates which
  fix issue with one external dependency and enable all xilinx device
  drivers for 0-day testing system.

  Additionally wire up finit_module system call, and do highmem fixup
  and pci warnings reported by the 0-day testing system"

* 'next' of git://git.monstr.eu/linux-2.6-microblaze:
  microblaze: Update microblaze defconfigs
  microblaze: Fix pci compilation and sparse warnings
  microblaze: Add finit_module syscall
  microblaze: Kill __kmap_atomic()
  microblaze: Change section flags for noMMU
  microblaze: Microblaze wants sys_fork for noMMU too
2013-01-07 07:39:32 -08:00
Gregory CLEMENT
8a3a180d21 ARM: 7616/1: cache-l2x0: aurora: Use writel_relaxed instead of writel
The use of writel instead of writel_relaxed lead to deadlock in some
situation (SMP on Armada 370 for instance). The use of writel_relaxed
as it was done in the rest of this driver fixes this bug.

Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Tested-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Acked-by: Jason Cooper <jason@lakedaemon.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2013-01-07 15:04:17 +00:00
Gregory CLEMENT
8b827c60a1 ARM: 7615/1: cache-l2x0: aurora: Invalidate during clean operation with WT enable
This patch fixes a bug for Aurora L2 cache controller when the
write-through mode is enable. For the clean operation even if we don't
have to flush the lines we still need to invalidate them.

Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Tested-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Acked-by: Jason Cooper <jason@lakedaemon.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2013-01-07 15:04:17 +00:00
Haojian Zhuang
d106de38ca ARM: 7614/1: mm: fix wrong branch from Cortex-A9 to PJ4b
If CONFIG_ARCH_MULTIPLATFORM & CONFIG_ARCH_MVEBU are both enabled,
__v7_pj4b_setup is added between __v7_ca9mp_setup and __v7_setup.

But there's no jump instruction added. If the chip is Cortex A5/A9,
it goes through __v7_pj4b_setup also. It results in system hang.

Signed-off-by: Haojian Zhuang <haojian.zhuang@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2013-01-06 17:54:08 +00:00
Fabio Estevam
a47e3bc10d ARM: 7612/1: imx: Do not select some errata that depends on !ARCH_MULTIPLATFORM
Since commit 62e4d357a (ARM: 7609/1: disable errata work-arounds which access
secure registers) ARM_ERRATA_743622/751472 depends on !ARCH_MULTIPLATFORM.

Since imx has been converted to multiplatform, the following warning happens:

$ make imx_v6_v7_defconfig
warning: (SOC_IMX6Q && ARCH_TEGRA_2x_SOC && ARCH_TEGRA_3x_SOC) selects
ARM_ERRATA_751472 which has unmet direct dependencies (CPU_V7 &&
!ARCH_MULTIPLATFORM)
warning: (SOC_IMX6Q && ARCH_TEGRA_3x_SOC) selects ARM_ERRATA_743622
which has unmet direct dependencies (CPU_V7 && !ARCH_MULTIPLATFORM)
warning: (SOC_IMX6Q && ARCH_TEGRA_3x_SOC) selects ARM_ERRATA_743622
which has unmet direct dependencies (CPU_V7 && !ARCH_MULTIPLATFORM)
warning: (SOC_IMX6Q && ARCH_TEGRA_2x_SOC && ARCH_TEGRA_3x_SOC) selects
ARM_ERRATA_751472 which has unmet direct dependencies (CPU_V7 &&
!ARCH_MULTIPLATFORM)

Recommended approach is to remove ARM_ERRATA_743622/751472 from being selected
by SOC_IMX6Q and apply such workarounds into the bootloader.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Acked-by: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2013-01-06 17:54:02 +00:00
Andrew Lunn
41be8dc1a4 arm: mvebu: Add missing ; for cpu node.
The Armada XP MV78230 DT include file is missing a ; at the
end of the cpu node.

Reported-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
2013-01-06 17:53:22 +00:00
Thomas Petazzoni
77916519cb arm: mvebu: Armada XP MV78230 has only three Ethernet interfaces
We originally thought that the MV78230 variant of the Armada XP had
four Ethernet interfaces, like the other variants MV78260 and
MV78460. In fact, this is not true, and the MV78230 has only three
Ethernet interfaces.

So, the definitions of the Ethernet interfaces is now done as follows:

 * armada-370-xp.dtsi: definitions of the first two interfaces, that
   are common to Armada 370 and Armada XP

 * armada-xp.dtsi: definition of the third interface, common to all
   Armada XP variants.

 * armada-xp-mv78260.dtsi and armada-xp-mv78460.dtsi: definition of
   the fourth interface.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
2013-01-06 17:53:19 +00:00
Thomas Petazzoni
44cfae9ac6 arm: mvebu: Armada XP MV78230 has two cores, not one
Contrary to our understanding at the time armada-xp-mv78230.dtsi was
written, the MV78230 variant of the Armada XP SoC has two cores and
not one. This patch updates the .dtsi file to take into account this
reality.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
2013-01-06 17:53:16 +00:00
Andrew Lunn
8758c885c4 ARM: Kirkwood: Use fixed-regulator instead of board gpio call
With the change to a DT based pinctrl/gpio driver, using gpio API
calls in board-*.c files no longer works, a dereferenced NULL pointer
exception occurs instead. By converting the GPIO code into a
fixed-regulator which gets probed later once pinctrl/gpio is
available, we avoid the exception.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Tested-by: Stefan Peter <s.peter@mplch>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
2013-01-06 17:53:10 +00:00
Andrew Lunn
d2268be3dc ARM: Kirkwood: Fix missing sdio clock
We moved to declaring clk gates in DT. However, device which do not
yet have a DT binding need to have a clkdev alias. This was missing
for SDIO.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Tested-by: Stefan Peter <s.peter@mplch>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
2013-01-06 17:53:06 +00:00
Nobuhiro Iwamatsu
107c21c346 ARM: Kirkwood: Switch TWSI1 of 88f6282 to DT clock providers
Clock Management of kirkwood has moved to DT clock providers.
However, TWSI1 has not yet been done.
This switches TWSI1 of 88f6282 to DT clock providers.

Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
2013-01-06 17:53:04 +00:00
Andrew Lunn
53dfa8e4aa ARM: Kirkwood: Fix missing clk for USB device.
Without the clock being held by a driver, it gets turned off at a bad
time causing the SoC to lockup. This is often during reboot.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Tested-by: Stefan Peter <s.peter@mpl.ch>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
2013-01-06 17:52:56 +00:00
Gregory CLEMENT
b24212fbfb arm: mvebu: Use dw-apb-uart instead of ns16650 as UART driver
The UART controller used in the Armada 370 and Armada XP SoCs is the
Synopsys DesignWare 8250 (aka Synopsys DesignWare ABP UART). The
improper use of the ns16550 can lead to a kernel oops during boot if
a character is sent to the UART before the initialization of the
driver. The DW APB has an extra interrupt that gets raised when
writing to the LCR when busy. This explains why we need to use
dw-apb-uart driver to handle this.

Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
2013-01-06 17:41:14 +00:00
Kukjin Kim
61bcbc2af8 ARM: EXYNOS: skip the clock initialization for exynos5440
Since exynos5440 can support only common clk stuff, so this
patch skips legacy exynos5 clock initialization.

Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2013-01-05 08:32:55 -08:00
Linus Torvalds
5f243b9b46 - Missing include in asm/compat.h.
- Kconfig updates.
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Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-aarch64

Pull ARM64 fixes from Catalin Marinas:
 - Missing include in asm/compat.h.
 - Kconfig updates.

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-aarch64:
  arm64: Always select ARM_AMBA and GENERIC_GPIO
  arm64: Keep the ARM64 Kconfig selects sorted
  arm64: Include linux/ptrace.h in asm/compat.h
2013-01-04 10:41:54 -08:00
Catalin Marinas
25c92a37a8 arm64: Always select ARM_AMBA and GENERIC_GPIO
Needed for most SoCs.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-01-04 13:20:09 +00:00
Michal Simek
d0e045401f microblaze: Update microblaze defconfigs
The main reason is 0-day testing system which can directly
use these defconfigs for testing.

Enable support for all xilinx drivers which Microblaze
can use and disable dependency on external rootfs.cpio.
There is only one exception which is axi ethernet driver
which still uses NO_IRQ which is not defined for Microblaze.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
2013-01-04 09:52:36 +01:00