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We want to use the alignment as the allocation and mapping unit.
Previously this information was only useful for establishing the data
offset, but now it is important to remember the granularity for the
later use.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
We may want to subdivide a device-dax range into multiple devices so
that each can have separate permissions or naming. Reserve 128K of
label space by default so we have the capability of making allocation
decisions persistent. This reservation is not something we can add
later since it would result in the default size of a device-dax range
changing between kernel versions.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Device DAX is the device-centric analogue of Filesystem DAX
(CONFIG_FS_DAX). It allows persistent memory ranges to be allocated and
mapped without need of an intervening file system. This initial
infrastructure arranges for a libnvdimm pfn-device to be represented as
a different device-type so that it can be attached to a driver other
than the pmem driver.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
I had relied on the kbuild robot for cross build coverage, however it
only builds alpha_defconfig. Switch from HPAGE_SIZE to PMD_SIZE, which
is more widely defined.
Fixes: 658922e57b ("libnvdimm, pfn: fix memmap reservation sizing")
Cc: <stable@vger.kernel.org>
Reported-by: Guenter Roeck <guenter@roeck-us.net>
Tested-by: Guenter Roeck <guenter@roeck-us.net>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Module option to limit userspace to the publicly defined command set.
For cases where private DIMM commands may be interfering with the
kernel's handling of DIMM state this option can be set to block vendor
specific commands.
Cc: Jerry Hoemann <jerry.hoemann@hpe.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
When transportation of the command completes successfully, it indicates
that the 'status' result is valid. Fix the missed checking and
translation of the status field at the end of acpi_nfit_ctl().
Otherwise, we fail to handle reported errors and assume commands
complete successfully.
Reported-by: Linda Knippers <linda.knippers@hpe.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
When configuring a pfn-device instance to allocate the memmap array it
needs to account for the fact that vmemmap_populate_hugepages()
allocates struct page blocks in HPAGE_SIZE chunks. We need to align the
reserved area size to 2MB otherwise arch_add_memory() runs out of memory
while establishing the memmap:
WARNING: CPU: 0 PID: 496 at arch/x86/mm/init_64.c:704 arch_add_memory+0xe7/0xf0
[..]
Call Trace:
[<ffffffff8148bdb3>] dump_stack+0x85/0xc2
[<ffffffff810a749b>] __warn+0xcb/0xf0
[<ffffffff810a75cd>] warn_slowpath_null+0x1d/0x20
[<ffffffff8106a497>] arch_add_memory+0xe7/0xf0
[<ffffffff811d2097>] devm_memremap_pages+0x287/0x450
[<ffffffff811d1ffa>] ? devm_memremap_pages+0x1ea/0x450
[<ffffffffa0000298>] __wrap_devm_memremap_pages+0x58/0x70 [nfit_test_iomap]
[<ffffffffa0047a58>] pmem_attach_disk+0x318/0x420 [nd_pmem]
[<ffffffffa0047bcf>] nd_pmem_probe+0x6f/0x90 [nd_pmem]
[<ffffffffa0009469>] nvdimm_bus_probe+0x69/0x110 [libnvdimm]
[..]
ndbus0: nd_pmem.probe(pfn3.0) = -12
nd_pmem: probe of pfn3.0 failed with error -12
libndctl: ndctl_pfn_enable: pfn3.0: failed to enable
Reported-by: Namratha Kothapalli <namratha.n.kothapalli@intel.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Similar to pci-sysfs export the subsystem information available in the
NFIT. ACPI 6.1 clarifies that this data is copied as an array of bytes
from the DIMM SPD data.
Reported-by: Ryon Jensen <ryon.jensen@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
ACPI6.1 clarifies that DCR fields are stored as an array of bytes,
update the format interface code constants to match.
Reviewed-by: Toshi Kani <toshi.kani@hpe.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
There are currently 4 known similar but incompatible definitions of the
command sets that can be sent to an NVDIMM through ACPI. It is also
clear that future platform generations (ACPI or not) will continue to
revise and extend the DIMM command set as new devices and use cases
arrive.
It is obviously untenable to continue to proliferate divergence
of these command definitions, and to that end a standardization process
has begun to provide for a unified specification. However, that leaves a
problem about what to do with this first generation where vendors are
already shipping divergence.
The Linux kernel can support these initial diverged platforms without
giving platform-firmware free reign to continue to diverge and compound
kernel maintenance overhead. The kernel implementation can encourage
standardization in two ways:
1/ Require that any function code that userspace wants to send be
explicitly white-listed in the implementation. For ACPI this means
function codes marked as supported by acpi_check_dsm() may
only be invoked if they appear in the white-list. A function must be
publicly documented before it is added to the white-list.
2/ The above restrictions can be trivially bypassed by using the
"vendor-specific" payload command. However, since vendor-specific
commands are by definition not publicly documented and have the
potential to corrupt the kernel's view of the dimm state, we provide a
toggle to disable vendor-specific operations. Enabling undefined
behavior is a policy decision that can be made by the platform owner
and encourages firmware implementations to choose public over
private command implementations.
Based on an initial patch from Jerry Hoemann
Cc: Jerry Hoemann <jerry.hoemann@hpe.com>
Cc: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Clarify the distinction between "commands", the ioctls userspace calls
to request the kernel take some action on a given dimm device, and
"_DSMs", the actual function numbers used in the firmware interface to
the DIMM. _DSMs are ACPI specific whereas commands are Linux kernel
generic.
This is in preparation for breaking the 1:1 implicit relationship
between the kernel ioctl number space and the firmware specific function
numbers.
Cc: Jerry Hoemann <jerry.hoemann@hpe.com>
Cc: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
nd_ioctl() must first read in the fixed sized portion of an ioctl so
that it can then determine the size of the variable part.
Prepare for ND_CMD_CALL calls which have larger fixed portion
envelope.
Signed-off-by: Jerry Hoemann <jerry.hoemann@hpe.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
ACPI 6.1, section 5.2.25.9, defines an identifier for an NVDIMM.
Change the NFIT driver to add a new sysfs file "id" under nfit
directory.
Signed-off-by: Toshi Kani <toshi.kani@hpe.com>
Cc: Rafael J. Wysocki <rjw@rjwysocki.net>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Robert Moore <robert.moore@intel.com>
Cc: Robert Elliott <elliott@hpe.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
ACPI 6.1, Table 5-133, updates NVDIMM Control Region Structure
as follows.
- Valid Fields, Manufacturing Location, and Manufacturing Date
are added from reserved range. No change in the structure size.
- IDs (SPD values) are stored as arrays of bytes (i.e. big-endian
format). The spec clarifies that they need to be represented
as arrays of bytes as well.
This patch makes the following changes to support this update.
- Change the NFIT driver to show SPD ID values in big-endian
format.
- Change sprintf format to use "0x" instead of "#" since "%#02x"
does not prepend '0'.
link: http://www.uefi.org/sites/default/files/resources/ACPI_6_1.pdf
Signed-off-by: Toshi Kani <toshi.kani@hpe.com>
Cc: Rafael J. Wysocki <rjw@rjwysocki.net>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Robert Moore <robert.moore@intel.com>
Cc: Robert Elliott <elliott@hpe.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Pull thermal fixes from Eduardo Valentin:
"Specifics in this pull request:
- Fixes in mediatek and OF thermal drivers
- Fixes in power_allocator governor
- More fixes of unsigned to int type change in thermal_core.c.
These change have been CI tested using KernelCI bot. \o/"
* 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/evalenti/linux-soc-thermal:
thermal: fix Mediatek thermal controller build
thermal: consistently use int for trip temp
thermal: fix mtk_thermal build dependency
thermal: minor mtk_thermal.c cleanups
thermal: power_allocator: req_range multiplication should be a 64 bit type
thermal: of: add __init attribute
Here is one patch to wire up the preadv/pwritev system calls in the
generic system call table, which is required for all architectures
that were merged in the last few years, including arm64.
Usually these get merged along with the syscall implementation
or one of the architecture trees, but this time that did not
happen.
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Merge tag 'asm-generic-4.6' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic
Pull asm-generic update from Arnd Bergmann:
"Here is one patch to wire up the preadv/pwritev system calls in the
generic system call table, which is required for all architectures
that were merged in the last few years, including arm64.
Usually these get merged along with the syscall implementation or one
of the architecture trees, but this time that did not happen.
Andre and Christoph both sent a version of this patch, I picked the
one I got first"
* tag 'asm-generic-4.6' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic:
generic syscalls: wire up preadv2 and pwritev2 syscalls
These new syscalls are implemented as generic code, so enable them for
architectures like arm64 which use the generic syscall table.
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Pull x86 fixes from Ingo Molnar:
"Misc fixes: two EDAC driver fixes, a Xen crash fix, a HyperV log spam
fix and a documentation fix"
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86 EDAC, sb_edac.c: Take account of channel hashing when needed
x86 EDAC, sb_edac.c: Repair damage introduced when "fixing" channel address
x86/mm/xen: Suppress hugetlbfs in PV guests
x86/doc: Correct limits in Documentation/x86/x86_64/mm.txt
x86/hyperv: Avoid reporting bogus NMI status for Gen2 instances
Pull perf, cpu hotplug and timer fixes from Ingo Molnar:
"perf:
- A single tooling fix for a user-triggerable segfault.
CPU hotplug:
- Fix a CPU hotplug corner case regression, introduced by the recent
hotplug rework
timers:
- Fix a boot hang in the ARM based Tango SoC clocksource driver"
* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
perf intel-pt: Fix segfault tracing transactions
* 'smp-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
cpu/hotplug: Fix rollback during error-out in __cpu_disable()
* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
clocksource/drivers/tango-xtal: Fix boot hang due to incorrect test
Pull locking fixes from Ingo Molnar:
"Misc fixes:
pvqspinlocks:
- an instrumentation fix
futexes:
- preempt-count vs pagefault_disable decouple corner case fix
- futex requeue plist race window fix
- futex UNLOCK_PI transaction fix for a corner case"
* 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
asm-generic/futex: Re-enable preemption in futex_atomic_cmpxchg_inatomic()
futex: Acknowledge a new waiter in counter before plist
futex: Handle unlock_pi race gracefully
locking/pvqspinlock: Fix division by zero in qstat_read()
Pull irq fixes from Ingo Molnar:
"A core irq affinity masks related fix and a MIPS irqchip driver fix"
* 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
irqchip/mips-gic: Don't overrun pcpu_masks array
genirq: Dont allow affinity mask to be updated on IPIs
Pull objtool fixes from Ingo Molnar:
"A handful of objtool fixes: two improvements to how warnings are
printed plus a false positive warning fix, and build environment fix"
* 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
objtool: Fix Makefile to properly see if libelf is supported
objtool: Detect falling through to the next function
objtool: Add workaround for GCC switch jump table bug
Here are two small sets of patches, both from subsystem trees, USB
gadget and PHY drivers.
Full details are in the shortlog, and they have all been in linux-next
for a while (before I merged them to the USB tree.)
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'usb-4.6-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
Pull USB / PHY driver fixes from Greg KH:
"Here are two small sets of patches, both from subsystem trees, USB
gadget and PHY drivers.
Full details are in the shortlog, and they have all been in linux-next
for a while (before I merged them to the USB tree)"
* tag 'usb-4.6-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
usb: gadget: f_fs: Fix use-after-free
usb: dwc3: gadget: Fix suspend/resume during device mode
usb: dwc3: fix memory leak of dwc->regset
usb: dwc3: core: fix PHY handling during suspend
usb: dwc3: omap: fix up error path on probe()
usb: gadget: composite: Clear reserved fields of SSP Dev Cap
phy: rockchip-emmc: adapt binding to specifiy register offset and length
phy: rockchip-emmc: should be a child device of the GRF
phy: rockchip-dp: should be a child device of the GRF
Here are 3 serial driver fixes for issues that have been reported. Two
are reverts, fixing problems that were in the big TTY/Serial driver
merge in 4.6-rc1, and the last one is a simple bugfix for a regression
that showed up in 4.6-rc1 as well.
All have been in linux-next with no reported issues.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'tty-4.6-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
Pull serial fixes from Greg KH:
"Here are 3 serial driver fixes for issues that have been reported.
Two are reverts, fixing problems that were in the big TTY/Serial
driver merge in 4.6-rc1, and the last one is a simple bugfix for a
regression that showed up in 4.6-rc1 as well.
All have been in linux-next with no reported issues"
* tag 'tty-4.6-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
Revert "serial: 8250: Add hardware dependency to RT288X option"
tty/serial/8250: fix RS485 half-duplex RX
Revert "serial-uartlite: Constify uartlite_be/uartlite_le"
The 'host' variable can be killed as it is always the same as the passed
in device.
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
The devm conversion obviates the need to continue to remember the queue
and disk locally in the driver.
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Now that pmem internals have been disentangled from pfn setup, that code
can move to the core. This is in preparation for adding another user of
the pfn-device capabilities.
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
In preparation for providing an alternative (to block device) access
mechanism to persistent memory, convert pmem_rw_bytes() to
nsio_rw_bytes(). This allows ->rw_bytes() functionality without
requiring a 'struct pmem_device' to be instantiated.
In other words, when ->rw_bytes() is in use i/o is driven through
'struct nd_namespace_io', otherwise it is driven through 'struct
pmem_device' and the block layer. This consolidates the disjoint calls
to devm_exit_badblocks() and devm_memunmap() into a common
devm_nsio_disable() and cleans up the init path to use a unified
pmem_attach_disk() implementation.
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
The leading '0x' in front of %pa is redundant, also we can just use %pR
to simplify the print statement. The request parameters can be directly
taken from the resource as well.
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Register a callback to clean up the request_queue and put the gendisk at
driver disable time.
Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Consolidate the information for issuing i/o to a blk-namespace, and
eliminate some pointer chasing.
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
I/O errors events have the potential to be a high frequency and a log
message for each event can swamp the system. This message is also
redundant with upper layer error reporting.
Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Save a pointer chase by storing the driver private data in the
request_queue rather than the gendisk.
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Save a pointer chase by storing the driver private data in the
request_queue rather than the gendisk.
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Register a callback to clean up the request_queue and put the gendisk at
driver disable time.
Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
- Make the i.MX driver select REGMAP as a dependency
- Fix up the Mediatek debounce time unit
- Fix a real hairy ffs vs __ffs issue in the Single pinctrl driver
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Merge tag 'pinctrl-v4.6-3' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl
Pull pin control fixes from Linus Walleij:
"Some pin control driver fixes came in. One headed for stable and the
other two are just ordinary merge window fixes.
- Make the i.MX driver select REGMAP as a dependency
- Fix up the Mediatek debounce time unit
- Fix a real hairy ffs vs __ffs issue in the Single pinctrl driver"
* tag 'pinctrl-v4.6-3' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl:
pinctrl: single: Fix pcs_parse_bits_in_pinctrl_entry to use __ffs than ffs
pinctrl: mediatek: correct debounce time unit in mtk_gpio_set_debounce
pinctrl: imx: Kconfig: PINCTRL_IMX select REGMAP
- Cache invalidation fix for early CPU boot status update (incorrect
cacheline)
- of_put_node() missing in the spin_table code
- EL1/El2 early init inconsistency when Virtualisation Host Extensions
are present
- RCU warning fix in the arm_pmu.c driver
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Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Pull arm64 fixes from Catalin Marinas:
- Cache invalidation fix for early CPU boot status update (incorrect
cacheline)
- of_put_node() missing in the spin_table code
- EL1/El2 early init inconsistency when Virtualisation Host Extensions
are present
- RCU warning fix in the arm_pmu.c driver
* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
arm64: Fix EL1/EL2 early init inconsistencies with VHE
drivers/perf: arm-pmu: fix RCU usage on pmu resume from low-power
arm64: spin-table: add missing of_node_put()
arm64: fix invalidation of wrong __early_cpu_boot_status cacheline
Pass the device performing the probe so we can use a devm allocation for
the btt superblock.
Cc: Vishal Verma <vishal.l.verma@intel.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Pass the device performing the probe so we can use a devm allocation for
the pfn superblock.
Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
We can derive the common namespace from other information. We also do
not need to cache it because all the usages are in slow paths.
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
- scan_features() updates incorrect bits for REAL_LE from Anton Blanchard
- Update cpu_user_features2 in scan_features() from Anton Blanchard
- Update TM user feature bits in scan_features() from Anton Blanchard
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Merge tag 'powerpc-4.6-3' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
Pull powerpc fixes from Michael Ellerman:
"Three powerpc cpu feature fixes from Anton Blanchard:
- scan_features() updated incorrect bits for REAL_LE
- update cpu_user_features2 in scan_features()
- update TM user feature bits in scan_features()"
* tag 'powerpc-4.6-3' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
powerpc: Update TM user feature bits in scan_features()
powerpc: Update cpu_user_features2 in scan_features()
powerpc: scan_features() updates incorrect bits for REAL_LE
