linux-toradex.git/arch/arm/mm, branch v4.2-rc8

ARM: invalidate L1 before enabling coherency

2015-07-17T14:08:40+00:00

We must invalidate the L1 cache before enabling coherency, otherwise
secondary CPUs can inject invalid cache lines into the coherent CPU
cluster, which could then be migrated to other CPUs.  This fixes a
recent regression with SoCFPGA randomly failing to boot.

Fixes: 02b4e2756e01 ("ARM: v7 setup function should invalidate L1 cache")
Signed-off-by: Russell King

ARM: 8404/1: dma-mapping: fix off-by-one error in bitmap size check

2015-07-17T14:08:40+00:00

nr_bitmaps member of mapping structure stores the number of already
allocated bitmaps and it is interpreted as loop iterator (it starts from
0 not from 1), so a comparison against number of possible bitmap
extensions should include this fact. This patch fixes this by changing
the extension failure condition. This issue has been introduced by
commit 4d852ef8c2544ce21ae41414099a7504c61164a0 ("arm: dma-mapping: Add
support to extend DMA IOMMU mappings").

Reported-by: Hyungwon Hwang 
Signed-off-by: Marek Szyprowski 
Reviewed-by: Hyungwon Hwang 
Cc: stable@vger.kernel.org  # v3.15+
Signed-off-by: Russell King

Merge branches 'fixes' and 'ioremap' into for-linus

2015-07-07T11:35:33+00:00

ARM: io: convert ioremap*() to functions

2015-07-03T16:06:56+00:00

Convert the ioremap*() preprocessor macros to real functions, moving
them out of line.  This allows us to kill off __arm_ioremap(), and
__arm_iounmap() helpers, and remove __arm_ioremap_pfn_caller() from
global view.

Signed-off-by: Russell King

ARM: add helpful message when truncating physical memory

2015-06-29T13:33:31+00:00

Add a nmessage to suggest that HIGHMEM is enabled when physical memory
is truncated due to lack of virtual address space to map it in the low
memory mapping.

Signed-off-by: Russell King

ARM: 8394/1: update memblock limit after mapping lowmem

2015-06-29T10:15:57+00:00

The memblock limit is currently used in find_limits
to find the bounds for ZONE_NORMAL. The memblock
limit may need to be rounded down a PMD size to ensure
allocations are fully mapped though. This has the side
effect of reducing the amount of memory in ZONE_NORMAL.
Once all lowmem is mapped, it's safe to change the memblock
limit back to include the unaligned section. Adjust the
memblock limit after lowmem mapping is complete.

Before:
 # cat /proc/zoneinfo | grep managed
        managed  62907
        managed  424

After:
 # cat /proc/zoneinfo | grep managed
        managed  63331

Signed-off-by: Laura Abbott 
Reviewed-by: Mark Rutland 
Tested-by: Mark Rutland 
Signed-off-by: Russell King

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

2015-06-26T19:20:00+00:00

Pull ARM updates from Russell King:
 "Bigger items included in this update are:

   - A series of updates from Arnd for ARM randconfig build failures
   - Updates from Dmitry for StrongARM SA-1100 to move IRQ handling to
     drivers/irqchip/
   - Move ARMs SP804 timer to drivers/clocksource/
   - Perf updates from Mark Rutland in preparation to move the ARM perf
     code into drivers/ so it can be shared with ARM64.
   - MCPM updates from Nicolas
   - Add support for taking platform serial number from DT
   - Re-implement Keystone2 physical address space switch to conform to
     architecture requirements
   - Clean up ARMv7 LPAE code, which goes in hand with the Keystone2
     changes.
   - L2C cleanups to avoid unlocking caches if we're prevented by the
     secure support to unlock.
   - Avoid cleaning a potentially dirty cache containing stale data on
     CPU initialisation
   - Add ARM-only entry point for secondary startup (for machines that
     can only call into a Thumb kernel in ARM mode).  Same thing is also
     done for the resume entry point.
   - Provide arch_irqs_disabled via asm-generic
   - Enlarge ARMv7M vector table
   - Always use BFD linker for VDSO, as gold doesn't accept some of the
     options we need.
   - Fix an incorrect BSYM (for Thumb symbols) usage, and convert all
     BSYM compiler macros to a "badr" (for branch address).
   - Shut up compiler warnings provoked by our cmpxchg() implementation.
   - Ensure bad xchg sizes fail to link"

* 'for-linus' of git://ftp.arm.linux.org.uk/~rmk/linux-arm: (75 commits)
  ARM: Fix build if CLKDEV_LOOKUP is not configured
  ARM: fix new BSYM() usage introduced via for-arm-soc branch
  ARM: 8383/1: nommu: avoid deprecated source register on mov
  ARM: 8391/1: l2c: add options to overwrite prefetching behavior
  ARM: 8390/1: irqflags: Get arch_irqs_disabled from asm-generic
  ARM: 8387/1: arm/mm/dma-mapping.c: Add arm_coherent_dma_mmap
  ARM: 8388/1: tcm: Don't crash when TCM banks are protected by TrustZone
  ARM: 8384/1: VDSO: force use of BFD linker
  ARM: 8385/1: VDSO: group link options
  ARM: cmpxchg: avoid warnings from macro-ized cmpxchg() implementations
  ARM: remove __bad_xchg definition
  ARM: 8369/1: ARMv7M: define size of vector table for Vybrid
  ARM: 8382/1: clocksource: make ARM_TIMER_SP804 depend on GENERIC_SCHED_CLOCK
  ARM: 8366/1: move Dual-Timer SP804 driver to drivers/clocksource
  ARM: 8365/1: introduce sp804_timer_disable and remove arm_timer.h inclusion
  ARM: 8364/1: fix BE32 module loading
  ARM: 8360/1: add secondary_startup_arm prototype in header file
  ARM: 8359/1: correct secondary_startup_arm mode
  ARM: proc-v7: sanitise and document registers around errata
  ARM: proc-v7: clean up MIDR access
  ...

Merge tag 'armsoc-cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

2015-06-26T18:08:27+00:00

Pull ARM SoC cleanups from Kevin Hilman:
 "A relatively small setup of cleanups this time around, and similar to
  last time the bulk of it is removal of legacy board support:

   - OMAP: removal of legacy (non-DT) booting for several platforms

   - i.MX: remove some legacy board files"

* tag 'armsoc-cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (36 commits)
  ARM: fix EFM32 build breakage caused by cpu_resume_arm
  ARM: 8389/1: Add cpu_resume_arm() for firmwares that resume in ARM state
  ARM: v7 setup function should invalidate L1 cache
  mach-omap2: Remove use of deprecated marco, PTR_RET in devices.c
  ARM: OMAP2+: Remove calls to deprecacted marco,PTR_RET in the files,fb.c and pmu.c
  ARM: OMAP2+: Constify irq_domain_ops
  ARM: OMAP2+: use symbolic defines for console loglevels instead of numbers
  ARM: at91: remove useless Makefile.boot
  ARM: at91: remove at91rm9200_sdramc.h
  ARM: at91: remove mach/at91_ramc.h and mach/at91rm9200_mc.h
  ARM: at91/pm: use the atmel-mc syscon defines
  pcmcia: at91_cf: Use syscon to configure the MC/smc
  ARM: at91: declare the at91rm9200 memory controller as a syscon
  mfd: syscon: Add Atmel MC (Memory Controller) registers definition
  ARM: at91: drop sam9_smc.c
  ata: at91: use syscon to configure the smc
  ARM: ux500: delete static resource defines
  ARM: ux500: rename ux500_map_io
  ARM: ux500: look up PRCMU resource from DT
  ARM: ux500: kill off L2CC static map
  ...

mm/hugetlb: reduce arch dependent code about huge_pmd_unshare

2015-06-25T00:49:41+00:00

Currently we have many duplicates in definitions of huge_pmd_unshare.  In
all architectures this function just returns 0 when
CONFIG_ARCH_WANT_HUGE_PMD_SHARE is N.

This patch puts the default implementation in mm/hugetlb.c and lets these
architectures use the common code.

Signed-off-by: Zhang Zhen 
Cc: Russell King 
Cc: Catalin Marinas 
Cc: Tony Luck 
Cc: James Hogan 
Cc: Ralf Baechle 
Cc: Benjamin Herrenschmidt 
Cc: Martin Schwidefsky 
Cc: Chris Metcalf 
Cc: David Rientjes 
Cc: James Yang 
Cc: Aneesh Kumar 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

2015-06-24T17:02:15+00:00

Pull arm64 updates from Catalin Marinas:
 "Mostly refactoring/clean-up:

   - CPU ops and PSCI (Power State Coordination Interface) refactoring
     following the merging of the arm64 ACPI support, together with
     handling of Trusted (secure) OS instances

   - Using fixmap for permanent FDT mapping, removing the initial dtb
     placement requirements (within 512MB from the start of the kernel
     image).  This required moving the FDT self reservation out of the
     memreserve processing

   - Idmap (1:1 mapping used for MMU on/off) handling clean-up

   - Removing flush_cache_all() - not safe on ARM unless the MMU is off.
     Last stages of CPU power down/up are handled by firmware already

   - "Alternatives" (run-time code patching) refactoring and support for
     immediate branch patching, GICv3 CPU interface access

   - User faults handling clean-up

  And some fixes:

   - Fix for VDSO building with broken ELF toolchains

   - Fix another case of init_mm.pgd usage for user mappings (during
     ASID roll-over broadcasting)

   - Fix for FPSIMD reloading after CPU hotplug

   - Fix for missing syscall trace exit

   - Workaround for .inst asm bug

   - Compat fix for switching the user tls tpidr_el0 register"

* tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (42 commits)
  arm64: use private ratelimit state along with show_unhandled_signals
  arm64: show unhandled SP/PC alignment faults
  arm64: vdso: work-around broken ELF toolchains in Makefile
  arm64: kernel: rename __cpu_suspend to keep it aligned with arm
  arm64: compat: print compat_sp instead of sp
  arm64: mm: Fix freeing of the wrong memmap entries with !SPARSEMEM_VMEMMAP
  arm64: entry: fix context tracking for el0_sp_pc
  arm64: defconfig: enable memtest
  arm64: mm: remove reference to tlb.S from comment block
  arm64: Do not attempt to use init_mm in reset_context()
  arm64: KVM: Switch vgic save/restore to alternative_insn
  arm64: alternative: Introduce feature for GICv3 CPU interface
  arm64: psci: fix !CONFIG_HOTPLUG_CPU build warning
  arm64: fix bug for reloading FPSIMD state after CPU hotplug.
  arm64: kernel thread don't need to save fpsimd context.
  arm64: fix missing syscall trace exit
  arm64: alternative: Work around .inst assembler bugs
  arm64: alternative: Merge alternative-asm.h into alternative.h
  arm64: alternative: Allow immediate branch as alternative instruction
  arm64: Rework alternate sequence for ARM erratum 845719
  ...