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The ARMv8.1 architecture extensions introduce support for hardware
updates of the access and dirty information in page table entries. With
TCR_EL1.HA enabled, when the CPU accesses an address with the PTE_AF bit
cleared in the page table, instead of raising an access flag fault the
CPU sets the actual page table entry bit. To ensure that kernel
modifications to the page tables do not inadvertently revert a change
introduced by hardware updates, the exclusive monitor (ldxr/stxr) is
adopted in the pte accessors.
When TCR_EL1.HD is enabled, a write access to a memory location with the
DBM (Dirty Bit Management) bit set in the corresponding pte
automatically clears the read-only bit (AP[2]). Such DBM bit maps onto
the Linux PTE_WRITE bit and to check whether a writable (DBM set) page
is dirty, the kernel tests the PTE_RDONLY bit. In order to allow
read-only and dirty pages, the kernel needs to preserve the software
dirty bit. The hardware dirty status is transferred to the software
dirty bit in ptep_set_wrprotect() (using load/store exclusive loop) and
pte_modify().
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
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Commit 68234df4ea79 ("arm64: kill flush_cache_all()") removed
soft_reset() from the kernel. This was the only caller of
setup_mm_for_reboot(), so remove that also.
Signed-off-by: Mark Salter <msalter@redhat.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
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Mark Brown reported an allnoconfig build failure in -next:
Today's linux-next fails to build an arm64 allnoconfig due to "mm:
make GUP handle pfn mapping unless FOLL_GET is requested" which
causes:
> arm64-allnoconfig
> ../mm/gup.c:51:4: error: implicit declaration of function
'update_mmu_cache' [-Werror=implicit-function-declaration]
Fix the error by moving the function to asm/pgtable.h, as is the case
for most other architectures.
Reported-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
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Since commit 9d3bfbb4df58 ("arm64: Combine coherent and non-coherent
swiotlb dma_ops"), __dma_common_mmap is no longer shared between two
callers, so roll it into the remaining one.
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
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Commit 68234df4ea79 ("arm64: kill flush_cache_all()") removed the
only users of these macros.
Signed-off-by: Daniel Thompson <daniel.thompson@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
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On 64bit kernel, the dump_mem gives 32 bit addresses
on the stack dump. This gives unorganized information regarding
the 64bit values on the stack. Hence, modified to get a complete 64bit memory
dump.
With patch:
[ 93.534801] Process insmod (pid: 1587, stack limit = 0xffffffc976be4058)
[ 93.541441] Stack: (0xffffffc976be7cf0 to 0xffffffc976be8000)
[ 93.547136] 7ce0: ffffffc976be7d00 ffffffc00008163c
[ 93.554898] 7d00: ffffffc976be7d40 ffffffc0000f8a44 ffffffc00098ef38 ffffffbffc000088
[ 93.562659] 7d20: ffffffc00098ef50 ffffffbffc0000c0 0000000000000001 ffffffbffc000070
[ 93.570419] 7d40: ffffffc976be7e40 ffffffc0000f935c 0000000000000000 000000002b424090
[ 93.578179] 7d60: 000000002b424010 0000007facc555f4 0000000080000000 0000000000000015
[ 93.585937] 7d80: 0000000000000116 0000000000000069 ffffffc00097b000 ffffffc976be4000
[ 93.593694] 7da0: 0000000000000064 0000000000000072 000000000000006e 000000000000003f
[ 93.601453] 7dc0: 000000000000feff 000000000000fff1 ffffffbffc002028 0000000000000124
[ 93.609211] 7de0: ffffffc976be7e10 0000000000000001 ffffff8000000000 ffffffbbffff0000
[ 93.616969] 7e00: ffffffc976be7e60 0000000000000000 0000000000000000 0000000000000000
[ 93.624726] 7e20: 0000000000000000 0000000000000000 0000000000000000 0000000000000000
[ 93.632484] 7e40: 0000007fcc474550 ffffffc0000841ec 000000002b424010 0000007facda0710
[ 93.640241] 7e60: ffffffffffffffff ffffffc0000be6dc ffffff80007d2000 000000000001c010
[ 93.647999] 7e80: ffffff80007e0ae0 ffffff80007e09d0 ffffff80007edf70 0000000000000288
[ 93.655757] 7ea0: 00000000000002e8 0000000000000000 0000000000000000 0000001c0000001b
[ 93.663514] 7ec0: 0000000000000009 0000000000000007 000000002b424090 000000000001c010
[ 93.671272] 7ee0: 000000002b424010 0000007faccd3a48 0000000000000000 0000000000000000
[ 93.679030] 7f00: 0000007fcc4743f8 0000007fcc4743f8 0000000000000069 0000000000000003
[ 93.686787] 7f20: 0101010101010101 0000000000000004 0000000000000020 00000000000003f3
[ 93.694544] 7f40: 0000007facb95664 0000007facda7030 0000007facc555d0 0000000000498378
[ 93.702301] 7f60: 0000000000000000 000000002b424010 0000007facda0710 000000002b424090
[ 93.710058] 7f80: 0000007fcc474698 0000000000498000 0000007fcc474ebb 0000000000474f58
[ 93.717815] 7fa0: 0000000000498000 0000000000000000 0000000000000000 0000007fcc474550
[ 93.725573] 7fc0: 00000000004104bc 0000007fcc474430 0000007facc555f4 0000000080000000
[ 93.733330] 7fe0: 000000002b424090 0000000000000069 0950020128000244 4104000008000004
[ 93.741084] Call trace:
The above output makes a debugger life a lot more easier.
Signed-off-by: Rohit Thapliyal <r.thapliyal@samsung.com>
Signed-off-by: Maninder Singh <maninder1.s@samsung.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
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of_cpu_device_node_get
arch_find_n_match_cpu_physical_id parses the device tree to get the
device node for a given logical cpu index. However, since ARM PMUs get
probed after the CPU device nodes are stashed while registering the
cpus, we can use of_cpu_device_node_get to avoid another DT parse.
This patch replaces arch_find_n_match_cpu_physical_id with
of_cpu_device_node_get to reuse the stashed value directly instead.
Cc: Will Deacon <will.deacon@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
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ARM64 pmu prints an error message in event_init() when
no hardware PMU is available. This is pretty annoying as
it keeps printing the message for every single trial, flooding
the kernel logs, unnecessarily. The return code is sufficient for
the user to figure out the reason.
Signed-off-by: Suzuki K. Poulose <suzuki.poulose@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
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This is a preparatory patch for moving irq_data struct members.
Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>
Reviewed-by: Hanjun Guo <hanjun.guo@linaro.org>
Cc: linux-arm-kernel@lists.infradead.org
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
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Commit 0c8c0f03e3a2 ("x86/fpu, sched: Dynamically allocate 'struct fpu'")
moved the thread_struct to the bottom of task_struct. As a result, the
offset is now too large to be used in an immediate add on arm64 with
some kernel configs:
arch/arm64/kernel/entry.S: Assembler messages:
arch/arm64/kernel/entry.S:588: Error: immediate out of range
arch/arm64/kernel/entry.S:597: Error: immediate out of range
This patch calculates the offset using an additional register instead of
an immediate offset.
Fixes: 0c8c0f03e3a2 ("x86/fpu, sched: Dynamically allocate 'struct fpu'")
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Olof Johansson <olof@lixom.net>
Cc: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Tested-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
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Commit 2ae416b142b6 ("mm: new mm hook framework") introduced an empty
header file (mm-arch-hooks.h) for every architecture, even those which
doesn't need to define mm hooks.
As suggested by Geert Uytterhoeven, this could be cleaned through the use
of a generic header file included via each per architecture
asm/include/Kbuild file.
The PowerPC architecture is not impacted here since this architecture has
to defined the arch_remap MM hook.
Signed-off-by: Laurent Dufour <ldufour@linux.vnet.ibm.com>
Suggested-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Vineet Gupta <vgupta@synopsys.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC fixes from Kevin Hilman:
"A fairly random colletion of fixes based on -rc1 for OMAP, sunxi and
prima2 as well as a few arm64-specific DT fixes.
This series also includes a late to support a new Allwinner (sunxi)
SoC, but since it's rather simple and isolated to the
platform-specific code, it's included it for this -rc"
* tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
arm64: dts: add device tree for ARM SMM-A53x2 on LogicTile Express 20MG
arm: dts: vexpress: add missing CCI PMU device node to TC2
arm: dts: vexpress: describe all PMUs in TC2 dts
GICv3: Add ITS entry to THUNDER dts
arm64: dts: Add poweroff button device node for APM X-Gene platform
ARM: dts: am4372.dtsi: disable rfbi
ARM: dts: am57xx-beagle-x15: Provide supply for usb2_phy2
ARM: dts: am4372: Add emif node
Revert "ARM: dts: am335x-boneblack: disable RTC-only sleep"
ARM: sunxi: Enable simplefb in the defconfig
ARM: Remove deprecated symbol from defconfig files
ARM: sunxi: Add Machine support for A33
ARM: sunxi: Introduce Allwinner H3 support
Documentation: sunxi: Update Allwinner SoC documentation
ARM: prima2: move to use REGMAP APIs for rtciobrg
ARM: dts: atlas7: add pinctrl and gpio descriptions
ARM: OMAP2+: Remove unnessary return statement from the void function, omap2_show_dma_caps
memory: omap-gpmc: Fix parsing of devices
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We currently set x27 in compat_sys_sigreturn_wrapper and
compat_sys_rt_sigreturn_wrapper, similarly to what we do with r8/why on
32-bit ARM, in an attempt to prevent sigreturns from being restarted.
However, on arm64 we have always used pt_regs::syscallno for syscall
restarting (for both native and compat tasks), and x27 is never
inspected again before being overwritten in kernel_exit.
This patch removes the pointless register assignments.
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
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Add a DTS file for the MP2 Cortex-A53 Soft Macrocell Model implemented
on a LogicTile Express 20MG (V2F-1XV7) daughterboard. This is based on
the version that's currently available from the ARM DTS repository [1].
[1] git://linux-arm.org/arm-dts.git
Signed-off-by: Kristina Martsenko <kristina.martsenko@arm.com>
Acked-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Kevin Hilman <khilman@linaro.org>
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The PCIe host controller uses MSIs provided by GICv3 ITS. Enable it on
Thunder SoCs by adding an entry to DT.
Signed-off-by: Tirumalesh Chalamarla <tchalamarla@cavium.com>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Kevin Hilman <khilman@linaro.org>
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This patch adds poweroff button device node to support poweroff feature
on APM X-Gene Mustang platform.
Signed-off-by: Y Vo <yvo@apm.com>
Signed-off-by: Kevin Hilman <khilman@linaro.org>
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Currently we enable debug exceptions before reading ESR_EL1 in both
el0_inv and el1_inv. If a debug exception is taken before we read
ESR_EL1, the value will have been corrupted.
As el*_inv is typically fatal, an intervening debug exception results in
misleading debug information being logged to the console, but is not
otherwise harmful.
As with the other entry paths, we can use the ESR_EL1 value stashed
earlier in the exception entry (in x25 for el0_sync{,_compat}, and x1
for el1_sync), giving us better error reporting in this case.
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
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Move EDAC_SUPPORT to the right place.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
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For those parts of the arm64 ACPI code that need to check GICC subtables
in the MADT, use the new BAD_MADT_GICC_ENTRY macro instead of the previous
BAD_MADT_ENTRY. The new macro takes into account differences in the size
of the GICC subtable that the old macro did not; this caused failures even
though the subtable entries are valid.
Fixes: aeb823bbacc2 ("ACPICA: ACPI 6.0: Add changes for FADT table.")
Signed-off-by: Al Stone <al.stone@linaro.org>
Reviewed-by: Hanjun Guo <hanjun.guo@linaro.org>
Acked-by: Will Deacon <will.deacon@arm.com>
Acked-by: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
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The BAD_MADT_ENTRY() macro is designed to work for all of the subtables
of the MADT. In the ACPI 5.1 version of the spec, the struct for the
GICC subtable (struct acpi_madt_generic_interrupt) is 76 bytes long; in
ACPI 6.0, the struct is 80 bytes long. But, there is only one definition
in ACPICA for this struct -- and that is the 6.0 version. Hence, when
BAD_MADT_ENTRY() compares the struct size to the length in the GICC
subtable, it fails if 5.1 structs are in use, and there are systems in
the wild that have them.
This patch adds the BAD_MADT_GICC_ENTRY() that checks the GICC subtable
only, accounting for the difference in specification versions that are
possible. The BAD_MADT_ENTRY() will continue to work as is for all other
MADT subtables.
This code is being added to an arm64 header file since that is currently
the only architecture using the GICC subtable of the MADT. As a GIC is
specific to ARM, it is also unlikely the subtable will be used elsewhere.
Fixes: aeb823bbacc2 ("ACPICA: ACPI 6.0: Add changes for FADT table.")
Signed-off-by: Al Stone <al.stone@linaro.org>
Acked-by: Will Deacon <will.deacon@arm.com>
Acked-by: "Rafael J. Wysocki" <rjw@rjwysocki.net>
[catalin.marinas@arm.com: extra brackets around macro arguments]
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
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The Ceva ahci controller is available on the Xilinx Zynq UltraScale+
MPSoC.
Signed-off-by: Suneel Garapati <suneel.garapati@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
[catalin.marinas@arm.com: removed unnecessary defconfig changes]
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
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Patch 63a4aea55670 ("of: clean-up unnecessary libfdt include paths")
removed all explicit libfdt include paths, since those are no longer
necessary after the latest dtc upgrade. However, this one snuck in
during the same merge window. Remove it.
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Pull arm64 fixes (and cleanups) from Catalin Marinas:
"Various arm64 fixes:
- suspicious RCU usage warning
- BPF (out of bounds array read and endianness conversion)
- perf (of_node usage after of_node_put, cpu_pmu->plat_device
assignment)
- huge pmd/pud check for value 0
- rate-limiting should only take unhandled signals into account
Clean-up:
- incorrect use of pgprot_t type
- unused header include
- __init annotation to arm_cpuidle_init
- pr_debug instead of pr_error for disabled GICC entries in
ACPI/MADT"
* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
arm64: Fix show_unhandled_signal_ratelimited usage
ARM64 / SMP: Switch pr_err() to pr_debug() for disabled GICC entry
arm64: cpuidle: add __init section marker to arm_cpuidle_init
arm64: Don't report clear pmds and puds as huge
arm64: perf: fix unassigned cpu_pmu->plat_device when probing PMU PPIs
arm64: perf: Don't use of_node after putting it
arm64: fix incorrect use of pgprot_t variable
arm64/hw_breakpoint.c: remove unnecessary header
arm64: bpf: fix endianness conversion bugs
arm64: bpf: fix out-of-bounds read in bpf2a64_offset()
ARM64: smp: Fix suspicious RCU usage with ipi tracepoints
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Commit 86dca36e6ba introduced ratelimited usage for
'unhandled_signal' messages.
The commit checks the ratelimit irrespective of whether
the signal is handled or not, which is wrong and leads
to false reports like the below in dmesg :
__do_user_fault: 127 callbacks suppressed
Do the ratelimit check only if the signal is unhandled.
Fixes: 86dca36e6ba0 ("arm64: use private ratelimit state along with show_unhandled_signals")
Cc: Vladimir Murzin <Vladimir.Murzin@arm.com>
Signed-off-by: Suzuki K. Poulose <suzuki.poulose@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
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It is normal that firmware presents GICC entry or entries (processors)
with disabled flag in ACPI MADT, taking a system of 16 cpus for example,
ACPI firmware may present 8 ebabled first with another 8 cpus disabled
in MADT, the disabled cpus can be hot-added later.
Firmware may also present more cpus than the hardware actually has, but
disabled the unused ones, and easily enable it when the hardware has such
cpus to make the firmware code scalable.
So that's not an error for disabled cpus in MADT, we can switch pr_err()
to pr_debug() to make the boot a little quieter by default.
Since hwid for disabled cpus often are invalid, and we check invalid hwid
first in the code, for use case that hot add cpus later will be filtered
out and will not be counted in possible cups, so move this check before
the hwid one to prepare the code to count for disabeld cpus when cpu
hot-plug is introduced.
Signed-off-by: Hanjun Guo <hanjun.guo@linaro.org>
Reviewed-by: Al Stone <ahs3@redhat.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC late fixes and dependencies from Kevin Hilman:
"This is a collection of a few late fixes and other misc stuff that had
dependencies on things being merged from other trees.
Other than the fixes, the primary feature being added is the
conversion of some OMAP drivers to the new generic wakeirq interface"
* tag 'armsoc-late' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
ARM: multi_v7_defconfig: Enable BRCMNAND driver
ARM: BCM: Do not select CONFIG_MTD_NAND_BRCMNAND
ARM: at91/dt: update udc compatible strings
ARM: at91/dt: trivial: fix USB udc compatible string
arm64: dts: Add APM X-Gene standby GPIO controller DTS entries
soc: qcom: spm: Fix idle on THUMB2 kernels
ARM: dove: fix legacy dove IRQ numbers
ARM: mvebu: fix suspend to RAM on big-endian configurations
ARM: mvebu: adjust Armada XP DT spi muxing after pinctrl function rename
serial: 8250_omap: Move wake-up interrupt to generic wakeirq
serial: omap: Switch wake-up interrupt to generic wakeirq
mmc: omap_hsmmc: Change wake-up interrupt to use generic wakeirq
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It is not needed after booting, this patch moves the arm_cpuidle_init()
function to the __init section.
Signed-off-by: Jisheng Zhang <jszhang@marvell.com>
Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
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Add standby domain gpio controller for APM X-Gene SoC platform.
Signed-off-by: Y Vo <yvo@apm.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Kevin Hilman <khilman@linaro.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip
Pull xen updates from David Vrabel:
"Xen features and cleanups for 4.2-rc0:
- add "make xenconfig" to assist in generating configs for Xen guests
- preparatory cleanups necessary for supporting 64 KiB pages in ARM
guests
- automatically use hvc0 as the default console in ARM guests"
* tag 'for-linus-4.2-rc0-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
block/xen-blkback: s/nr_pages/nr_segs/
block/xen-blkfront: Remove invalid comment
block/xen-blkfront: Remove unused macro MAXIMUM_OUTSTANDING_BLOCK_REQS
arm/xen: Drop duplicate define mfn_to_virt
xen/grant-table: Remove unused macro SPP
xen/xenbus: client: Fix call of virt_to_mfn in xenbus_grant_ring
xen: Include xen/page.h rather than asm/xen/page.h
kconfig: add xenconfig defconfig helper
kconfig: clarify kvmconfig is for kvm
xen/pcifront: Remove usage of struct timeval
xen/tmem: use BUILD_BUG_ON() in favor of BUG_ON()
hvc_xen: avoid uninitialized variable warning
xenbus: avoid uninitialized variable warning
xen/arm: allow console=hvc0 to be omitted for guests
arm,arm64/xen: move Xen initialization earlier
arm/xen: Correctly check if the event channel interrupt is present
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The current pmd_huge() and pud_huge() functions simply check if the table
bit is not set and reports the entries as huge in that case. This is
counter-intuitive as a clear pmd/pud cannot also be a huge pmd/pud, and
it is inconsistent with at least arm and x86.
To prevent others from making the same mistake as me in looking at code
that calls these functions and to fix an issue with KVM on arm64 that
causes memory corruption due to incorrect page reference counting
resulting from this mistake, let's change the behavior.
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
Reviewed-by: Steve Capper <steve.capper@linaro.org>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Fixes: 084bd29810a5 ("ARM64: mm: HugeTLB support.")
Cc: <stable@vger.kernel.org> # 3.11+
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
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Commit d795ef9aa831 ("arm64: perf: don't warn about missing
interrupt-affinity property for PPIs") added a check for PPIs so that
we avoid parsing the interrupt-affinity property for these naturally
affine interrupts.
Unfortunately, this check can trigger an early (successful) return and
we will not assign the value of cpu_pmu->plat_device. This patch fixes
the issue.
Signed-off-by: Shannon Zhao <shannon.zhao@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
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It's possible, albeit unlikely, that using the of_node here will
reference freed memory. Call of_node_put() after printing the
name to be safe.
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
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This fixes a build failure under STRICT_MM_TYPECHECKS, by adding
a missing pgprot_val() around a pgport_t reference.
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/djbw/nvdimm
Pull libnvdimm subsystem from Dan Williams:
"The libnvdimm sub-system introduces, in addition to the
libnvdimm-core, 4 drivers / enabling modules:
NFIT:
Instantiates an "nvdimm bus" with the core and registers memory
devices (NVDIMMs) enumerated by the ACPI 6.0 NFIT (NVDIMM Firmware
Interface table).
After registering NVDIMMs the NFIT driver then registers "region"
devices. A libnvdimm-region defines an access mode and the
boundaries of persistent memory media. A region may span multiple
NVDIMMs that are interleaved by the hardware memory controller. In
turn, a libnvdimm-region can be carved into a "namespace" device and
bound to the PMEM or BLK driver which will attach a Linux block
device (disk) interface to the memory.
PMEM:
Initially merged in v4.1 this driver for contiguous spans of
persistent memory address ranges is re-worked to drive
PMEM-namespaces emitted by the libnvdimm-core.
In this update the PMEM driver, on x86, gains the ability to assert
that writes to persistent memory have been flushed all the way
through the caches and buffers in the platform to persistent media.
See memcpy_to_pmem() and wmb_pmem().
BLK:
This new driver enables access to persistent memory media through
"Block Data Windows" as defined by the NFIT. The primary difference
of this driver to PMEM is that only a small window of persistent
memory is mapped into system address space at any given point in
time.
Per-NVDIMM windows are reprogrammed at run time, per-I/O, to access
different portions of the media. BLK-mode, by definition, does not
support DAX.
BTT:
This is a library, optionally consumed by either PMEM or BLK, that
converts a byte-accessible namespace into a disk with atomic sector
update semantics (prevents sector tearing on crash or power loss).
The sinister aspect of sector tearing is that most applications do
not know they have a atomic sector dependency. At least today's
disk's rarely ever tear sectors and if they do one almost certainly
gets a CRC error on access. NVDIMMs will always tear and always
silently. Until an application is audited to be robust in the
presence of sector-tearing the usage of BTT is recommended.
Thanks to: Ross Zwisler, Jeff Moyer, Vishal Verma, Christoph Hellwig,
Ingo Molnar, Neil Brown, Boaz Harrosh, Robert Elliott, Matthew Wilcox,
Andy Rudoff, Linda Knippers, Toshi Kani, Nicholas Moulin, Rafael
Wysocki, and Bob Moore"
* tag 'libnvdimm-for-4.2' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/nvdimm: (33 commits)
arch, x86: pmem api for ensuring durability of persistent memory updates
libnvdimm: Add sysfs numa_node to NVDIMM devices
libnvdimm: Set numa_node to NVDIMM devices
acpi: Add acpi_map_pxm_to_online_node()
libnvdimm, nfit: handle unarmed dimms, mark namespaces read-only
pmem: flag pmem block devices as non-rotational
libnvdimm: enable iostat
pmem: make_request cleanups
libnvdimm, pmem: fix up max_hw_sectors
libnvdimm, blk: add support for blk integrity
libnvdimm, btt: add support for blk integrity
fs/block_dev.c: skip rw_page if bdev has integrity
libnvdimm: Non-Volatile Devices
tools/testing/nvdimm: libnvdimm unit test infrastructure
libnvdimm, nfit, nd_blk: driver for BLK-mode access persistent memory
nd_btt: atomic sector updates
libnvdimm: infrastructure for btt devices
libnvdimm: write blk label set
libnvdimm: write pmem label set
libnvdimm: blk labels and namespace instantiation
...
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git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC defconfig updates from Kevin Hilman:
"We keep collecting defconfig updates in a separate branch mostly to
encourage people to handle them separately and avoid conflicts between
different topics.
Most of these are enablement of new SoCs, boards or drivers that have
come in, or minor config refreshes due to reorderings in Kconfig
files, etc. I.e. mostly minor churn of various kinds"
* tag 'armsoc-defconfig' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (55 commits)
ARM: multi_v7_defconfig: remove duplicate CONFIG_COMMON_CLK_QCOM=y
ARM: multi_v7_defconfig: Enable display on Trats2 board
ARM64: add GPIO keys to the defconfig
ARM: keystone: defconfig: enable netcp driver by default
ARM: exynos_defconfig: Enable CONFIG_SENSORS_INA2XX for Odroid-XU3
ARM: exynos_defconfig: Enable CONFIG_SENSORS_PWM_FAN for Odroid-XU3
ARM: omap2plus_defconfig: Enable TOUCHSCREEN_PIXCIR
ARM: omap2plus_defconfig: Add dm816x USB PHY as a loadable module
ARM: omap2plus_defconifg: Enable DM9000 in omap2plus_defconfig
ARM: lpc18xx: remove DEBUG_LL_UART_8250 from defconfig
ARM: multi_v7_defconfig: Make media support modular
ARM: multi_v7_defconfig: Make sound support modular
ARM: multi_v7_defconfig: Enable shmobile r8a7778/bockw platform
ARM: exynos_defconfig: savedefconfig
ARM: exynos_defconfig: Enable display on Trats2 board
ARM: multi_v7_defconfig: Enable OHCI on exynos SoCs
ARM: multi_v7_defconfig: Enable TMU for exynos SoCs
ARM: multi_v7_defconfig: Enable PMIC and MUIC drivers for exynos
ARM: multi_v7_defconfig: Enable CPU idle for exynos SoCs
ARM: multi_v7_defconfig: Enable Cypress APA I2C Trackpad support
...
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git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC driver updates from Kevin Hilman:
"Some of these are for drivers/soc, where we're now putting
SoC-specific drivers these days. Some are for other driver subsystems
where we have received acks from the appropriate maintainers.
Some highlights:
- simple-mfd: document DT bindings and misc updates
- migrate mach-berlin to simple-mfd for clock, pinctrl and reset
- memory: support for Tegra132 SoC
- memory: introduce tegra EMC driver for scaling memory frequency
- misc. updates for ARM CCI and CCN busses"
* tag 'armsoc-drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (48 commits)
drivers: soc: sunxi: Introduce SoC driver to map SRAMs
arm-cci: Add aliases for PMU events
arm-cci: Add CCI-500 PMU support
arm-cci: Sanitise CCI400 PMU driver specific code
arm-cci: Abstract handling for CCI events
arm-cci: Abstract out the PMU counter details
arm-cci: Cleanup PMU driver code
arm-cci: Do not enable CCI-400 PMU by default
firmware: qcom: scm: Add HDCP Support
ARM: berlin: add an ADC node for the BG2Q
ARM: berlin: remove useless chip and system ctrl compatibles
clk: berlin: drop direct of_iomap of nodes reg property
ARM: berlin: move BG2Q clock node
ARM: berlin: move BG2CD clock node
ARM: berlin: move BG2 clock node
clk: berlin: prepare simple-mfd conversion
pinctrl: berlin: drop SoC stub provided regmap
ARM: berlin: move pinctrl to simple-mfd nodes
pinctrl: berlin: prepare to use regmap provided by syscon
reset: berlin: drop arch_initcall initialization
...
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git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC DT updates from Kevin Hilman:
"As usual, quite a few device-tree updates in ARM land. There was one
minor churn in DTs due to relicensing under a dual-license, and lots
of little additions of new peripherals, features etc, but nothing
really exciting to call to your attention. Some higlights, focsuing
on support for new SoCs and boards:
- AT91: new boards: Overkiz, Acme Systems' Arietta G25
- tegra: HDA support
- bcm: new platforms: Buffalo WXR-1900DHP, SmartRG SR400ac, ASUS
RT-AC87U
- mvebu: new platforms: Compulab CM-A510, Armada 385-based Linksys
boards, DLink DNS-327L
- OMAP: new platforms: Baltos IR5221, LogicPD Torpedo, Toby-Churchill
SL50
- ARM: added support for Juno r1 board
- sunxi: A33 SoC support; new boards: A23 EVB, SinA33, GA10H-A33,
Mele A1000G
- imx: i.MX7D SoC support; new boards: Armadeus Systems APF6,
Gateworks GW5510, and aristainetos2 boards
- hisilicon: hi6220 SoC support; new boards: 96boards hikey"
* tag 'armsoc-dt' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (462 commits)
ARM: hisi: revert changes from hisi/hip04-dt branch
ARM: nomadik: set proper compatible for accelerometer
ARM64: juno: add GPIO keys
ARM: at91/dt: sama5d4: fix dma conf for aes, sha and tdes nodes
ARM: dts: Introduce STM32F429 MCU
ARM: socfpga: dts: enable ethernet for Arria10 devkit
ARM: dts: k2l: fix the netcp range size
ARM: dts: k2e: fix the netcp range size
ARM: dts: k2hk: fix the netcp range size
ARM: dts: k2l-evm: Add device bindings for netcp driver
ARM: dts: k2e-evm: Add device bindings for netcp driver
ARM: dts: k2hk-evm: Add device bindings for netcp driver
ARM: BCM5301X: Add DT for Asus RT-AC87U
ARM: BCM5301X: add IRQ numbers for PCIe controller
ARM: BCM5301X: add NAND flash chip description
arm64: dts: Add dts files for Hisilicon Hi6220 SoC
clk: hi6220: Document devicetree bindings for hi6220 clock
arm64: hi6220: Document devicetree bindings for Hisilicon hi6220 SoC
ARM: at91/dt: sama5d4ek: mci0 uses slot 0
ARM: at91/dt: kizbox: fix mismatch LED PWM device
...
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git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC platform support updates from Kevin Hilman:
"Our SoC branch usually contains expanded support for new SoCs and
other core platform code. Some highlights from this round:
- sunxi: SMP support for A23 SoC
- socpga: big-endian support
- pxa: conversion to common clock framework
- bcm: SMP support for BCM63138
- imx: support new I.MX7D SoC
- zte: basic support for ZX296702 SoC"
* tag 'armsoc-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (134 commits)
ARM: zx: Add basic defconfig support for ZX296702
ARM: dts: zx: add an initial zx296702 dts and doc
clk: zx: add clock support to zx296702
dt-bindings: Add #defines for ZTE ZX296702 clocks
ARM: socfpga: fix build error due to secondary_startup
MAINTAINERS: ARM64: EXYNOS: Extend entry for ARM64 DTS
ARM: ep93xx: simone: support for SPI-based MMC/SD cards
MAINTAINERS: update Shawn's email to use kernel.org one
ARM: socfpga: support suspend to ram
ARM: socfpga: add CPU_METHOD_OF_DECLARE for Arria 10
ARM: socfpga: use CPU_METHOD_OF_DECLARE for socfpga_cyclone5
ARM: EXYNOS: register power domain driver from core_initcall
ARM: EXYNOS: use PS_HOLD based poweroff for all supported SoCs
ARM: SAMSUNG: Constify platform_device_id
ARM: EXYNOS: Constify irq_domain_ops
ARM: EXYNOS: add coupled cpuidle support for Exynos3250
ARM: EXYNOS: add exynos_get_boot_addr() helper
ARM: EXYNOS: add exynos_set_boot_addr() helper
ARM: EXYNOS: make exynos_core_restart() less verbose
ARM: EXYNOS: fix exynos_boot_secondary() return value on timeout
...
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git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
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
...
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Merge second patchbomb from Andrew Morton:
- most of the rest of MM
- lots of misc things
- procfs updates
- printk feature work
- updates to get_maintainer, MAINTAINERS, checkpatch
- lib/ updates
* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (96 commits)
exit,stats: /* obey this comment */
coredump: add __printf attribute to cn_*printf functions
coredump: use from_kuid/kgid when formatting corename
fs/reiserfs: remove unneeded cast
NILFS2: support NFSv2 export
fs/befs/btree.c: remove unneeded initializations
fs/minix: remove unneeded cast
init/do_mounts.c: add create_dev() failure log
kasan: remove duplicate definition of the macro KASAN_FREE_PAGE
fs/efs: femove unneeded cast
checkpatch: emit "NOTE: <types>" message only once after multiple files
checkpatch: emit an error when there's a diff in a changelog
checkpatch: validate MODULE_LICENSE content
checkpatch: add multi-line handling for PREFER_ETHER_ADDR_COPY
checkpatch: suggest using eth_zero_addr() and eth_broadcast_addr()
checkpatch: fix processing of MEMSET issues
checkpatch: suggest using ether_addr_equal*()
checkpatch: avoid NOT_UNIFIED_DIFF errors on cover-letter.patch files
checkpatch: remove local from codespell path
checkpatch: add --showfile to allow input via pipe to show filenames
...
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Header <asm/kdebug.h> is not needed for arm64/hw_breakpoint.c,
Removing the same.
Signed-off-by: Maninder Singh <maninder1.s@samsung.com>
Reviewed-by: Vaneet Narang <v.narang@samsung.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
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Upper bits should be zeroed in endianness conversion:
- even when there's no need to change endianness (i.e., BPF_FROM_BE
on big endian or BPF_FROM_LE on little endian);
- after rev16.
This patch fixes such bugs by emitting extra instructions to clear
upper bits.
Cc: Zi Shen Lim <zlim.lnx@gmail.com>
Acked-by: Alexei Starovoitov <ast@plumgrid.com>
Fixes: e54bcde3d69d ("arm64: eBPF JIT compiler")
Cc: <stable@vger.kernel.org> # 3.18+
Signed-off-by: Xi Wang <xi.wang@gmail.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
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Nobody used these hooks so they were removed from common code, and can now
be removed from the architectures.
Signed-off-by: Dominik Dingel <dingel@linux.vnet.ibm.com>
Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Acked-by: Ralf Baechle <ralf@linux-mips.org>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Pull asm/scatterlist.h removal from Jens Axboe:
"We don't have any specific arch scatterlist anymore, since parisc
finally switched over. Kill the include"
* 'for-4.2/sg' of git://git.kernel.dk/linux-block:
remove scatterlist.h generation from arch Kbuild files
remove <asm/scatterlist.h>
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Problems occur when bpf_to or bpf_from has value prog->len - 1 (e.g.,
"Very long jump backwards" in test_bpf where the last instruction is a
jump): since ctx->offset has length prog->len, ctx->offset[bpf_to + 1]
or ctx->offset[bpf_from + 1] will cause an out-of-bounds read, leading
to a bogus jump offset and kernel panic.
This patch moves updating ctx->offset to after calling build_insn(),
and changes indexing to use bpf_to and bpf_from without + 1.
Fixes: e54bcde3d69d ("arm64: eBPF JIT compiler")
Cc: <stable@vger.kernel.org> # 3.18+
Cc: Zi Shen Lim <zlim.lnx@gmail.com>
Cc: Will Deacon <will.deacon@arm.com>
Acked-by: Alexei Starovoitov <ast@plumgrid.com>
Signed-off-by: Xi Wang <xi.wang@gmail.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
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John Stultz reported an RCU splat on ARM with ipi trace events
enabled. It looks like the same problem exists on ARM64.
At this point in the IPI handling path we haven't called
irq_enter() yet, so RCU doesn't know that we're about to exit
idle and properly warns that we're using RCU from an idle CPU.
Use trace_ipi_entry_rcuidle() instead of trace_ipi_entry() so
that RCU is informed about our exit from idle.
Cc: John Stultz <john.stultz@linaro.org>
Cc: Nicolas Pitre <nicolas.pitre@linaro.org>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Reviewed-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: <stable@vger.kernel.org> # 3.17+
Fixes: 45ed695ac10a ("ARM64: add IPI tracepoints")
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
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ARM: SoC: defconfig updates for v4.2
We keep collecting defconfig updates in a separate branch mostly to encourage
people to handle them separately and avoid conflicts between different topics.
Most of these are enablement of new SoCs, boards or drivers that have
come in, or minor config refreshes due to reorderings in Kconfig
files, etc. I.e. mostly minor churn of various kinds.
Conflicts: None
# gpg: Signature made Wed Jun 24 21:32:27 2015 PDT using RSA key ID D3FBC665
# gpg: Good signature from "Kevin Hilman <khilman@deeprootsystems.com>"
# gpg: aka "Kevin Hilman <khilman@linaro.org>"
# gpg: aka "Kevin Hilman <khilman@kernel.org>"
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ARM: SoC: driver updates for v4.2
Some of these are for drivers/soc, where we're now putting
SoC-specific drivers these days. Some are for other driver subsystems
where we have received acks from the appropriate maintainers.
Some highlights:
- simple-mfd: document DT bindings and misc updates
- migrate mach-berlin to simple-mfd for clock, pinctrl and reset
- memory: support for Tegra132 SoC
- memory: introduce tegra EMC driver for scaling memory frequency
- misc. updates for ARM CCI and CCN busses
Conflicts:
arch/arm64/boot/dts/arm/juno-motherboard.dtsi
Trivial add/add conflict with our dt branch.
Resolution: take both sides.
# gpg: Signature made Wed Jun 24 21:32:17 2015 PDT using RSA key ID D3FBC665
# gpg: Good signature from "Kevin Hilman <khilman@deeprootsystems.com>"
# gpg: aka "Kevin Hilman <khilman@linaro.org>"
# gpg: aka "Kevin Hilman <khilman@kernel.org>"
# Conflicts:
# arch/arm64/boot/dts/arm/juno-motherboard.dtsi
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ARM: SoC: DT updates for v4.2
As usual, quite a few device-tree updates in ARM land. There was ome
minor churn in DTs due to relicensing under a dual-license, and lots
of little additions of new peripherals, features etc, but nothing
really exciting to call to your attention. Some higlights, focsuing
on support for new SoCs and boards:
- AT91: new boards: Overkiz, Acme Systems' Arietta G25
- tegra: HDA support
- bcm: new platforms: Buffalo WXR-1900DHP, SmartRG SR400ac, ASUS RT-AC87U
- mvebu: new platforms: Compulab CM-A510, Armada 385-based Linksys
boards, DLink DNS-327L
- OMAP: new platforms: Baltos IR5221, LogicPD Torpedo, Toby-Churchill SL50
- ARM: added support for Juno r1 board
- sunxi: A33 SoC support; new boards: A23 EVB, SinA33, GA10H-A33, Mele A1000G
- imx: i.MX7D SoC support; new boards: Armadeus Systems APF6,
Gateworks GW5510, and aristainetos2 boards
- hisilicon: hi6220 SoC support; new boards: 96boards hikey
Conflicts: None
# gpg: Signature made Wed Jun 24 21:32:14 2015 PDT using RSA key ID D3FBC665
# gpg: Good signature from "Kevin Hilman <khilman@deeprootsystems.com>"
# gpg: aka "Kevin Hilman <khilman@linaro.org>"
# gpg: aka "Kevin Hilman <khilman@kernel.org>"
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ARM: SoC: platform support for v4.2
Our SoC branch usually contains expanded support for new SoCs and
other core platform code. Some highlights from this round:
- sunxi: SMP support for A23 SoC
- socpga: big-endian support
- pxa: conversion to common clock framework
- bcm: SMP support for BCM63138
- imx: support new I.MX7D SoC
- zte: basic support for ZX296702 SoC
Conflicts:
arch/arm/mach-socfpga/core.h
Trivial remove/remove conflict with our cleanup branch.
Resolution: remove both sides
# gpg: Signature made Wed Jun 24 21:32:12 2015 PDT using RSA key ID D3FBC665
# gpg: Good signature from "Kevin Hilman <khilman@deeprootsystems.com>"
# gpg: aka "Kevin Hilman <khilman@linaro.org>"
# gpg: aka "Kevin Hilman <khilman@kernel.org>"
# Conflicts:
# arch/arm/mach-socfpga/core.h
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