This seems to be a mis-reading of how alpha memory ordering works, and
is not backed up by the alpha architecture manual. The helper functions
don't do anything special on any other architectures, and the arguments
that support them being safe on other architectures also argue that they
are safe on alpha.
Basically, the "control dependency" is between a previous read and a
subsequent write that is dependent on the value read. Even if the
subsequent write is actually done speculatively, there is no way that
such a speculative write could be made visible to other cpu's until it
has been committed, which requires validating the speculation.
Note that most weakely ordered architectures (very much including alpha)
do not guarantee any ordering relationship between two loads that depend
on each other on a control dependency:
read A
if (val == 1)
read B
because the conditional may be predicted, and the "read B" may be
speculatively moved up to before reading the value A. So we require the
user to insert a smp_rmb() between the two accesses to be correct:
read A;
if (A == 1)
smp_rmb()
read B
Alpha is further special in that it can break that ordering even if the
*address* of B depends on the read of A, because the cacheline that is
read later may be stale unless you have a memory barrier in between the
pointer read and the read of the value behind a pointer:
read ptr
read offset(ptr)
whereas all other weakly ordered architectures guarantee that the data
dependency (as opposed to just a control dependency) will order the two
accesses. As a result, alpha needs a "smp_read_barrier_depends()" in
between those two reads for them to be ordered.
The coontrol dependency that "READ_ONCE_CTRL()" and "atomic_read_ctrl()"
had was a control dependency to a subsequent *write*, however, and
nobody can finalize such a subsequent write without having actually done
the read. And were you to write such a value to a "stale" cacheline
(the way the unordered reads came to be), that would seem to lose the
write entirely.
So the things that make alpha able to re-order reads even more
aggressively than other weak architectures do not seem to be relevant
for a subsequent write. Alpha memory ordering may be strange, but
there's no real indication that it is *that* strange.
Also, the alpha architecture reference manual very explicitly talks
about the definition of "Dependence Constraints" in section 5.6.1.7,
where a preceding read dominates a subsequent write.
Such a dependence constraint admittedly does not impose a BEFORE (alpha
architecture term for globally visible ordering), but it does guarantee
that there can be no "causal loop". I don't see how you could avoid
such a loop if another cpu could see the stored value and then impact
the value of the first read. Put another way: the read and the write
could not be seen as being out of order wrt other cpus.
So I do not see how these "x_ctrl()" functions can currently be necessary.
I may have to eat my words at some point, but in the absense of clear
proof that alpha actually needs this, or indeed even an explanation of
how alpha could _possibly_ need it, I do not believe these functions are
called for.
And if it turns out that alpha really _does_ need a barrier for this
case, that barrier still should not be "smp_read_barrier_depends()".
We'd have to make up some new speciality barrier just for alpha, along
with the documentation for why it really is necessary.
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul E McKenney <paulmck@us.ibm.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Pull locking changes from Ingo Molnar:
"The main changes in this cycle were:
- More gradual enhancements to atomic ops: new atomic*_read_ctrl()
ops, synchronize atomic_{read,set}() ordering requirements between
architectures, add atomic_long_t bitops. (Peter Zijlstra)
- Add _{relaxed|acquire|release}() variants for inc/dec atomics and
use them in various locking primitives: mutex, rtmutex, mcs, rwsem.
This enables weakly ordered architectures (such as arm64) to make
use of more locking related optimizations. (Davidlohr Bueso)
- Implement atomic[64]_{inc,dec}_relaxed() on ARM. (Will Deacon)
- Futex kernel data cache footprint micro-optimization. (Rasmus
Villemoes)
- pvqspinlock runtime overhead micro-optimization. (Waiman Long)
- misc smaller fixlets"
* 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
ARM, locking/atomics: Implement _relaxed variants of atomic[64]_{inc,dec}
locking/rwsem: Use acquire/release semantics
locking/mcs: Use acquire/release semantics
locking/rtmutex: Use acquire/release semantics
locking/mutex: Use acquire/release semantics
locking/asm-generic: Add _{relaxed|acquire|release}() variants for inc/dec atomics
atomic: Implement atomic_read_ctrl()
atomic, arch: Audit atomic_{read,set}()
atomic: Add atomic_long_t bitops
futex: Force hot variables into a single cache line
locking/pvqspinlock: Kick the PV CPU unconditionally when _Q_SLOW_VAL
locking/osq: Relax atomic semantics
locking/qrwlock: Rename ->lock to ->wait_lock
locking/Documentation/lockstat: Fix typo - lokcing -> locking
locking/atomics, cmpxchg: Privatize the inclusion of asm/cmpxchg.h
Pull RCU changes from Ingo Molnar:
"The main changes in this cycle were:
- Improvements to expedited grace periods (Paul E McKenney)
- Performance improvements to and locktorture tests for percpu-rwsem
(Oleg Nesterov, Paul E McKenney)
- Torture-test changes (Paul E McKenney, Davidlohr Bueso)
- Documentation updates (Paul E McKenney)
- Miscellaneous fixes (Paul E McKenney, Boqun Feng, Oleg Nesterov,
Patrick Marlier)"
* 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (54 commits)
fs/writeback, rcu: Don't use list_entry_rcu() for pointer offsetting in bdi_split_work_to_wbs()
rcu: Better hotplug handling for synchronize_sched_expedited()
rcu: Enable stall warnings for synchronize_rcu_expedited()
rcu: Add tasks to expedited stall-warning messages
rcu: Add online/offline info to expedited stall warning message
rcu: Consolidate expedited CPU selection
rcu: Prepare for consolidating expedited CPU selection
cpu: Remove try_get_online_cpus()
rcu: Stop excluding CPU hotplug in synchronize_sched_expedited()
rcu: Stop silencing lockdep false positive for expedited grace periods
rcu: Switch synchronize_sched_expedited() to IPI
locktorture: Fix module unwind when bad torture_type specified
torture: Forgive non-plural arguments
rcutorture: Fix unused-function warning for torturing_tasks()
rcutorture: Fix module unwind when bad torture_type specified
rcu_sync: Cleanup the CONFIG_PROVE_RCU checks
locking/percpu-rwsem: Clean up the lockdep annotations in percpu_down_read()
locking/percpu-rwsem: Fix the comments outdated by rcu_sync
locking/percpu-rwsem: Make use of the rcu_sync infrastructure
locking/percpu-rwsem: Make percpu_free_rwsem() after kzalloc() safe
...
Pull EFI changes from Ingo Molnar:
"The main changes in this cycle were:
- further EFI code generalization to make it more workable for ARM64
- various extensions, such as 64-bit framebuffer address support,
UEFI v2.5 EFI_PROPERTIES_TABLE support
- code modularization simplifications and cleanups
- new debugging parameters
- various fixes and smaller additions"
* 'core-efi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (23 commits)
efi: Fix warning of int-to-pointer-cast on x86 32-bit builds
efi: Use correct type for struct efi_memory_map::phys_map
x86/efi: Fix kernel panic when CONFIG_DEBUG_VIRTUAL is enabled
efi: Add "efi_fake_mem" boot option
x86/efi: Rename print_efi_memmap() to efi_print_memmap()
efi: Auto-load the efi-pstore module
efi: Introduce EFI_NX_PE_DATA bit and set it from properties table
efi: Add support for UEFIv2.5 Properties table
efi: Add EFI_MEMORY_MORE_RELIABLE support to efi_md_typeattr_format()
efifb: Add support for 64-bit frame buffer addresses
efi/arm64: Clean up efi_get_fdt_params() interface
arm64: Use core efi=debug instead of uefi_debug command line parameter
efi/x86: Move efi=debug option parsing to core
drivers/firmware: Make efi/esrt.c driver explicitly non-modular
efi: Use the generic efi.memmap instead of 'memmap'
acpi/apei: Use appropriate pgprot_t to map GHES memory
arm64, acpi/apei: Implement arch_apei_get_mem_attributes()
arm64/mm: Add PROT_DEVICE_nGnRnE and PROT_NORMAL_WT
acpi, x86: Implement arch_apei_get_mem_attributes()
efi, x86: Rearrange efi_mem_attributes()
...
Pull wchan kernel address hiding from Ingo Molnar:
"This fixes a wchan related information leak in /proc/PID/stat.
There's a bit of an ABI twist to it: instead of setting the wchan
field to 0 (which is our usual technique) we set it conditionally to a
0/1 flag to keep ABI compatibility with older procps versions that
only fetches /proc/PID/wchan (symbolic names) if the absolute wchan
address is nonzero"
* 'core-debug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
fs/proc, core/debug: Don't expose absolute kernel addresses via wchan
Pull irq updates from Thomas Gleixner:
"The irq departement delivers:
- Rework the irqdomain core infrastructure to accomodate ACPI based
systems. This is required to support ARM64 without creating
artificial device tree nodes.
- Sanitize the ACPI based ARM GIC initialization by making use of the
new firmware independent irqdomain core
- Further improvements to the generic MSI management
- Generalize the irq migration on CPU hotplug
- Improvements to the threaded interrupt infrastructure
- Allow the migration of "chained" low level interrupt handlers
- Allow optional force masking of interrupts in disable_irq[_nosysnc]
- Support for two new interrupt chips - Sigh!
- A larger set of errata fixes for ARM gicv3
- The usual pile of fixes, updates, improvements and cleanups all
over the place"
* 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (71 commits)
Document that IRQ_NONE should be returned when IRQ not actually handled
PCI/MSI: Allow the MSI domain to be device-specific
PCI: Add per-device MSI domain hook
of/irq: Use the msi-map property to provide device-specific MSI domain
of/irq: Split of_msi_map_rid to reuse msi-map lookup
irqchip/gic-v3-its: Parse new version of msi-parent property
PCI/MSI: Use of_msi_get_domain instead of open-coded "msi-parent" parsing
of/irq: Use of_msi_get_domain instead of open-coded "msi-parent" parsing
of/irq: Add support code for multi-parent version of "msi-parent"
irqchip/gic-v3-its: Add handling of PCI requester id.
PCI/MSI: Add helper function pci_msi_domain_get_msi_rid().
of/irq: Add new function of_msi_map_rid()
Docs: dt: Add PCI MSI map bindings
irqchip/gic-v2m: Add support for multiple MSI frames
irqchip/gic-v3: Fix translation of LPIs after conversion to irq_fwspec
irqchip/mxs: Add Alphascale ASM9260 support
irqchip/mxs: Prepare driver for hardware with different offsets
irqchip/mxs: Panic if ioremap or domain creation fails
irqdomain: Documentation updates
irqdomain/msi: Use fwnode instead of of_node
...
Pull ARM updates from Russell King:
"In this ARM merge, we remove more lines than we add. Changes include:
- Enable imprecise aborts early, so that bus errors aren't masked
until later in the boot. This has the side effect that boot
loaders which provoke these aborts can cause the kernel to crash
early in boot, so we install a handler to report this event around
the site where these are enabled.
- Remove the buggy but impossible to enable cmpxchg syscall code.
- Add unwinding annotations to some assembly code.
- Add support for atomic half-word exchange for ARMv6k+.
- Reduce ioremap() alignment for SMP/LPAE cases where we don't need
the large alignment.
- Addition of an "optimal" 3G configuration for systems with 1G of
RAM.
- Increase vmalloc space by 128M.
- Constify some SMP operations structures, which have never been
writable.
- Improve ARMs dma_mmap() support for mapping DMA coherent mappings
into userspace.
- Fix to the NMI backtrace code in the IPI case on ARM where the
failing CPU gets stuck for 10s waiting for its own IPI to be
delivered.
- Removal of legacy PM support from the AMBA bus driver.
- Another fix for the previous fix of vdsomunge"
* 'for-linus' of git://ftp.arm.linux.org.uk/~rmk/linux-arm: (23 commits)
ARM: 8449/1: fix bug in vdsomunge swab32 macro
arm: add missing of_node_put
ARM: 8447/1: catch pending imprecise abort on unmask
ARM: 8446/1: amba: Remove unused callbacks for legacy system PM
ARM: 8443/1: Adding support for atomic half word exchange
ARM: clean up TWD after previous patch
ARM: 8441/2: twd: Don't set CLOCK_EVT_FEAT_C3STOP unconditionally
ARM: 8440/1: remove obsolete documentation
ARM: make highpte an expert option
ARM: 8433/1: add a VMSPLIT_3G_OPT config option
ARM: 8439/1: Fix backtrace generation when IPI is masked
ARM: 8428/1: kgdb: Fix registers on sleeping tasks
ARM: 8427/1: dma-mapping: add support for offset parameter in dma_mmap()
ARM: 8426/1: dma-mapping: add missing range check in dma_mmap()
ARM: remove user cmpxchg syscall
ARM: 8438/1: Add unwinding to __clear_user_std()
ARM: 8436/1: hw_breakpoint: remove unnecessary header
ARM: 8434/2: Revert "7655/1: smp_twd: make twd_local_timer_of_register() no-op for nosmp"
ARM: 8432/1: move VMALLOC_END from 0xff000000 to 0xff800000
ARM: 8430/1: use default ioremap alignment for SMP or LPAE
...
Some generic THP bits are touched - all ACKed by Kirill
- Platform framework updates to prepare for EZChip arrival (still in works)
- ARC Public Mailing list setup finally (linux-snps-arc@lists.infraded.org)
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Merge tag 'arc-4.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc
Pull ARC updates from Vineet Gupta:
- Support for new MM features in ARCv2 cores (THP, PAE40) Some generic
THP bits are touched - all ACKed by Kirill
- Platform framework updates to prepare for EZChip arrival (still in works)
- ARC Public Mailing list setup finally (linux-snps-arc@lists.infraded.org)
* tag 'arc-4.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc: (42 commits)
ARC: mm: PAE40 support
ARC: mm: PAE40: tlbex.S: Explicitify the size of pte_t
ARC: mm: PAE40: switch to using phys_addr_t for physical addresses
ARC: mm: HIGHMEM: populate high memory from DT
ARC: mm: HIGHMEM: kmap API implementation
ARC: mm: preps ahead of HIGHMEM support #2
ARC: mm: preps ahead of HIGHMEM support
ARC: mm: use generic macros _BITUL()/_AC()
ARC: mm: Improve Duplicate PD Fault handler
MAINTAINERS: Add public mailing list for ARC
ARC: Ensure DT mem base is same as what kernel is built with
ARC: boot: Non Master cpus only need to call EARLY_CPU_SETUP once
ARCv2: smp: [plat-*]: No need to explicitly call mcip_init_smp()
ARC: smp: Introduce smp hook @init_irq_cpu called for all cores
ARC: smp: Rename platform hook @init_smp -> @init_cpu_smp
ARCv2: smp: [plat-*]: No need to explicitly call mcip_init_early_smp()
ARC: smp: Introduce smp hook @init_early_smp for Master core
ARC: remove @init_time, @init_irq platform callbacks
ARC: smp: irqchip: handle IPI as percpu irq like timer
ARC: boot: Support Halt-on-reset and Run-on-reset SMP booting modes
...
- Add 'invert' sysfs attribute to the heartbeat trigger.
- Add Device Tree support to the leds-netxbig driver and add
related DT nodes to the kirkwood-netxbig.dtsi and kirkwood-net5big.dts
files. Remove static LED setup from the related board files.
- Remove redundant brightness conversion operation from leds-netxbig.
- Improve leds-bcm6328 driver: improve default-state handling, add more
init configuration options, print invalid LED instead of warning only
about maximum LED value.
- Add a shutdown function for setting gpio-leds into off state
when shutting down.
- Fix DT flash timeout property naming in leds-aat1290.txt.
- Switch to using devm prefixed version of led_classdev_register()
(leds-cobalt-qube, leds-hp6xx, leds-ot200, leds-ipaq-micro,
leds-netxbig, leds-locomo, leds-menf21bmc, leds-net48xx,
leds-wrap).
- Add missing of_node_put (leds-powernv, leds-bcm6358, leds-bcm6328,
leds-88pm860x).
- Coding style fixes and cleanups: led-class/led-core, leds-ipaq-micro.
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Merge tag 'leds_for_4.4' of git://git.kernel.org/pub/scm/linux/kernel/git/j.anaszewski/linux-leds
Pull LED updates from Jacek Anaszewski:
- Move the out-of-LED-tree led-sead3 driver to the LED subsystem.
- Add 'invert' sysfs attribute to the heartbeat trigger.
- Add Device Tree support to the leds-netxbig driver and add related DT
nodes to the kirkwood-netxbig.dtsi and kirkwood-net5big.dts files.
Remove static LED setup from the related board files.
- Remove redundant brightness conversion operation from leds-netxbig.
- Improve leds-bcm6328 driver: improve default-state handling, add more
init configuration options, print invalid LED instead of warning only
about maximum LED value.
- Add a shutdown function for setting gpio-leds into off state when
shutting down.
- Fix DT flash timeout property naming in leds-aat1290.txt.
- Switch to using devm prefixed version of led_classdev_register()
(leds-cobalt-qube, leds-hp6xx, leds-ot200, leds-ipaq-micro,
leds-netxbig, leds-locomo, leds-menf21bmc, leds-net48xx, leds-wrap).
- Add missing of_node_put (leds-powernv, leds-bcm6358, leds-bcm6328,
leds-88pm860x).
- Coding style fixes and cleanups: led-class/led-core, leds-ipaq-micro.
* tag 'leds_for_4.4' of git://git.kernel.org/pub/scm/linux/kernel/git/j.anaszewski/linux-leds: (27 commits)
leds: 88pm860x: add missing of_node_put
leds: bcm6328: add missing of_node_put
leds: bcm6358: add missing of_node_put
powerpc/powernv: add missing of_node_put
leds: leds-wrap.c: Use devm_led_classdev_register
leds: aat1290: Fix property naming of flash-timeout-us
leds: leds-net48xx: Use devm_led_classdev_register
leds: leds-menf21bmc.c: Use devm_led_class_register
leds: leds-locomo.c: Use devm_led_classdev_register
leds: leds-gpio: add shutdown function
Documentation: leds: update DT bindings for leds-bcm6328
leds-bcm6328: add more init configuration options
leds-bcm6328: simplify and improve default-state handling
leds-bcm6328: print invalid LED
leds: netxbig: set led_classdev max_brightness
leds: netxbig: convert to use the devm_ functions
ARM: mvebu: remove static LED setup for netxbig boards
ARM: Kirkwood: add LED DT entries for netxbig boards
leds: netxbig: add device tree binding
leds: triggers: add invert to heartbeat
...
flash-timeout-us property name is changed to flash-max-timeout-us.
This patch fixes that name.
Signed-off-by: Ingi Kim <ingi2.kim@samsung.com>
Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com>
This patch adds device tree support for the netxbig LEDs.
This also introduces a additionnal DT binding for the GPIO extension bus
(netxbig-gpio-ext) used to configure the LEDs. Since this bus could also
be used to control other devices, then it seems more suitable to have it
in a separate DT binding.
Signed-off-by: Simon Guinot <simon.guinot@sequanux.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com>
GPIO core:
- Define and handle flags for open drain/open collector
and open source/open emitter, also know as "single-ended"
configurations.
- Generic request/free operations that handle calling out
to the (optional) pin control backend.
- Some refactoring related to an ABI change that did not
happen, yet provide useful.
- Added a real-time compliance checklist. Many GPIO chips
have irqchips, and need to think this over with the RT
patches going upstream.
- Restructure, fix and clean up Kconfig menus a bit.
New drivers:
- New driver for AMD Promony.
- New driver for ACCES 104-IDIO-16, a port-mapped I/O
card, ISA-style. Very retro.
Subdriver changes:
- OMAP changes to handle real time requirements.
- Handle trigger types for edge and level IRQs on PL061
properly. As this hardware is very common it needs to
set a proper example for others to follow.
- Some container_of() cleanups.
- Delete the unused MSM driver in favor of the driver that
is embedded inside the pin control driver.
- Cleanup of the ath79 GPIO driver used by many, many
OpenWRT router targets.
- A consolidated IT87xx driver replacing the earlier
very specific IT8761e driver.
- Handle the TI TCA9539 in the PCA953x driver. Also
handle ACPI devices in this subdriver.
- Drop xilinx arch dependencies as these FPGAs seem to
profilate over a few different architectures. MIPS and
ARM come to mind.
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Merge tag 'gpio-v4.4-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio
Pull GPIO updates from Linus Walleij:
"Here is the bulk of GPIO changes for the v4.4 development cycle.
The only changes hitting outside drivers/gpio are in the pin control
subsystem and these seem to have settled nicely in linux-next.
Development mistakes and catfights are nicely documented in the
reverts as you can see. The outcome of the ABI fight is that we're
working on a chardev ABI for GPIO now, where hope to show results for
the v4.5 kernel.
Summary of changes:
GPIO core:
- Define and handle flags for open drain/open collector and open
source/open emitter, also know as "single-ended" configurations.
- Generic request/free operations that handle calling out to the
(optional) pin control backend.
- Some refactoring related to an ABI change that did not happen, yet
provide useful.
- Added a real-time compliance checklist. Many GPIO chips have
irqchips, and need to think this over with the RT patches going
upstream.
- Restructure, fix and clean up Kconfig menus a bit.
New drivers:
- New driver for AMD Promony.
- New driver for ACCES 104-IDIO-16, a port-mapped I/O card,
ISA-style. Very retro.
Subdriver changes:
- OMAP changes to handle real time requirements.
- Handle trigger types for edge and level IRQs on PL061 properly. As
this hardware is very common it needs to set a proper example for
others to follow.
- Some container_of() cleanups.
- Delete the unused MSM driver in favor of the driver that is
embedded inside the pin control driver.
- Cleanup of the ath79 GPIO driver used by many, many OpenWRT router
targets.
- A consolidated IT87xx driver replacing the earlier very specific
IT8761e driver.
- Handle the TI TCA9539 in the PCA953x driver. Also handle ACPI
devices in this subdriver.
- Drop xilinx arch dependencies as these FPGAs seem to profilate over
a few different architectures. MIPS and ARM come to mind"
* tag 'gpio-v4.4-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: (57 commits)
gpio: fix up SPI submenu
gpio: drop surplus I2C dependencies
gpio: drop surplus X86 dependencies
gpio: dt-bindings: document the official use of "ngpios"
gpio: MAINTAINERS: Add an entry for the ATH79 GPIO driver
gpio / ACPI: Allow shared GPIO event to be read via operation region
gpio: group port-mapped I/O drivers in a menu
gpio: Add ACCES 104-IDIO-16 driver maintainer entry
gpio: zynq: Document interrupt-controller DT binding
gpio: xilinx: Drop architecture dependencies
gpio: generic: Revert to old error handling in bgpio_map
gpio: add a real time compliance notes
Revert "gpio: add a real time compliance checklist"
gpio: Add GPIO support for the ACCES 104-IDIO-16
gpio: driver for AMD Promontory
gpio: xlp: Convert to use gpiolib irqchip helpers
gpio: add a real time compliance checklist
gpio/xilinx: enable for MIPS
gpiolib: Add and use OF_GPIO_SINGLE_ENDED flag
gpiolib: Split GPIO flags parsing and GPIO configuration
...
v4.4 kernel development cycle:
Infrastructure:
- Doug Anderson wrote a patch adding an "init" state
different from the "default" state for pin control
state handling in the core framework. This is applied
before the driver's probe() call if defined and takes
precedence over "default". If both are defined, "init"
will be applied *before* probe() and "default" will be
applied *after* probe().
Significant subdriver improvements:
- SH PFC is switched to getting GPIO ranges from the
device tree ranges property on DT platforms.
- Got rid of CONFIG_ARCH_SHMOBILE_LEGACY, we are all
modernized.
- Got rid of SH PFC hardcoded IRQ numbers.
- Allwinner sunxi external interrupt through the "r"
controller.
- Moved the Cygnus driver to use DT-provided GPIO
ranges.
New drivers:
- Atmel PIO4 pin controller for the SAMA4D2 family
New subdrivers:
- Rockchip RK3036 subdriver
- Renesas SH PFC R8A7795 subdriver
- Allwinner sunxi A83T PIO subdriver
- Freescale i.MX7d iomux lpsr subdriver
- Marvell Berlin BG4CT subdriver
- SiRF Atlas 7 step B SoC subdriver
- Intel Broxton SoC subdriver
Apart from this, the usual slew if syntactic and semantic
fixes.
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Merge tag 'pinctrl-v4.4-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl
Pull pin control updates from Linus Walleij:
"This is the big bulk of pin control changes for the v4.4 kernel
development cycle. Development pace is high in pin control again this
merge window. 28 contributors, 83 patches.
It hits a few sites outside the pin control subsystem:
- Device tree bindings in Documentation (as usual)
- MAINTAINERS
- drivers/base/* for the "init" state handling by Doug Anderson.
This has been ACKed by Greg.
- drivers/usb/renesas_usbhs/rcar2.c, for a dependent Renesas change
in the USB subsystem. This has been ACKed by both Greg and Felipe.
- arch/arm/boot/dts/sama5d2.dtsi - this should ideally have gone
through the ARM SoC tree but ended up here.
This time I am using Geert Uytterhoeven as submaintainer for SH PFC
since the are three-four people working in parallel with new Renesas
ASICs.
Summary of changes:
Infrastructure:
- Doug Anderson wrote a patch adding an "init" state different from
the "default" state for pin control state handling in the core
framework. This is applied before the driver's probe() call if
defined and takes precedence over "default". If both are defined,
"init" will be applied *before* probe() and "default" will be
applied *after* probe().
Significant subdriver improvements:
- SH PFC is switched to getting GPIO ranges from the device tree
ranges property on DT platforms.
- Got rid of CONFIG_ARCH_SHMOBILE_LEGACY, we are all modernized.
- Got rid of SH PFC hardcoded IRQ numbers.
- Allwinner sunxi external interrupt through the "r" controller.
- Moved the Cygnus driver to use DT-provided GPIO ranges.
New drivers:
- Atmel PIO4 pin controller for the SAMA4D2 family
New subdrivers:
- Rockchip RK3036 subdriver
- Renesas SH PFC R8A7795 subdriver
- Allwinner sunxi A83T PIO subdriver
- Freescale i.MX7d iomux lpsr subdriver
- Marvell Berlin BG4CT subdriver
- SiRF Atlas 7 step B SoC subdriver
- Intel Broxton SoC subdriver
Apart from this, the usual slew if syntactic and semantic fixes"
* tag 'pinctrl-v4.4-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl: (81 commits)
pinctrl: pinconf: remove needless loop
pinctrl: uniphier: guard uniphier directory with CONFIG_PINCTRL_UNIPHIER
pinctrl: zynq: fix UTF-8 errors
pinctrl: zynq: Initialize early
pinctrl: at91: add missing of_node_put
pinctrl: tegra-xusb: Correct lane mux options
pinctrl: intel: Add Intel Broxton pin controller support
pinctrl: intel: Allow requesting pins which are in ACPI mode as GPIOs
pinctrl: intel: Add support for multiple GPIO chips sharing the interrupt
drivers/pinctrl: Add the concept of an "init" state
pinctrl: uniphier: set input-enable before pin-muxing
pinctrl: cygnus: Add new compatible string for gpio controller driver
pinctrl: cygnus: Remove GPIO to Pinctrl pin mapping from driver
pinctrl: cygnus: Optional DT property to support pin mappings
pinctrl: sunxi: Add irq pinmuxing to sun6i "r" pincontroller
pinctrl: sunxi: Fix irq_of_xlate for the r_pio pinctrl block
pinctrl: sh-pfc: Remove obsolete r8a7778 platform_device_id entry
pinctrl: sh-pfc: Remove obsolete r8a7779 platform_device_id entry
pinctrl: sh-pfc: Stop including <linux/platform_data/gpio-rcar.h>
usb: renesas_usbhs: Remove unneeded #include <linux/platform_data/gpio-rcar.h>
...
* L3 and SoC support for xgene_edac. (Loc Ho)
* AMD F15h, models 0x60-6f support to amd64_edac. (Aravind Gopalakrishnan)
* Fixes and cleanups all over the place.
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Merge tag 'edac_for_4.4' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp
Pull EDAC updates from Borislav Petkov:
"A bunch of fixes all over the place and some hw enablement this time.
- Convert EDAC to debugfs wrappers and make drivers use those
(Borislav Petkov)
- L3 and SoC support for xgene_edac (Loc Ho)
- AMD F15h, models 0x60-6f support to amd64_edac (Aravind
Gopalakrishnan)
- Fixes and cleanups all over the place"
* tag 'edac_for_4.4' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp: (22 commits)
EDAC: Fix PAGES_TO_MiB macro misuse
EDAC, altera: SoCFPGA EDAC should not look for ECC_CORR_EN
EDAC: Use edac_debugfs_remove_recursive()
EDAC, ppc4xx_edac: Fix module autoload for OF platform driver
Documentation/EDAC: Add reference documents section for amd64_edac
EDAC, amd64_edac: Update copyright and remove changelog
EDAC, amd64_edac: Extend scrub rate support to F15hM60h
EDAC: Don't allow empty DIMM labels
EDAC: Fix sysfs dimm_label store operation
EDAC: Fix sysfs dimm_label show operation
arm64, EDAC: Add L3/SoC DT subnodes to the APM X-Gene SoC EDAC node
EDAC, xgene: Add SoC support
EDAC, xgene: Fix possible sprintf() overflow issue
EDAC, xgene: Add L3 support
EDAC, Documentation: Update X-Gene EDAC binding for L3/SoC subnodes
EDAC, sb_edac: Fix TAD presence check for sbridge_mci_bind_devs()
EDAC, ghes_edac: Remove redundant memory_type array
EDAC, xgene: Convert to debugfs wrappers
EDAC, i5100: Convert to debugfs wrappers
EDAC, altera: Convert to debugfs wrappers
...
- Add new API to set VCCQ voltage - mmc_regulator_set_vqmmc()
- Add new ioctl to allow userspace to send multi commands
- Wait for card busy signalling before starting SDIO requests
- Remove MMC_CLKGATE
- Enable tuning for DDR50 mode
- Some code clean-up/improvements to mmc pwrseq
- Use highest priority for eMMC restart handler
- Add DT bindings for eMMC hardware reset support
- Extend the mmc_send_tuning() API
- Improve ios show for debugfs
- A couple of code optimizations
MMC host:
- Some generic OF improvements
- Various code clean-ups
- sirf: Add support for DDR50
- sunxi: Add support for card busy detection
- mediatek: Use MMC_CAP_RUNTIME_RESUME
- mediatek: Add support for eMMC HW-reset
- mediatek: Add support for HS400
- dw_mmc: Convert to use the new mmc_regulator_set_vqmmc() API
- dw_mmc: Add external DMA interface support
- dw_mmc: Some various improvements
- dw_mmc-rockchip: MMC tuning with the clock phase framework
- sdhci: Properly clear IRQs during resume
- sdhci: Enable tuning for DDR50 mode
- sdhci-of-esdhc: Use IRQ mode for card detection
- sdhci-of-esdhc: Support both BE and LE host controller
- sdhci-pci: Build o2micro support in the same module
- sdhci-pci: Support for new Intel host controllers
- sdhci-acpi: Support for new Intel host controllers
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Merge tag 'mmc-v4.4' of git://git.linaro.org/people/ulf.hansson/mmc
Pull MMC updates from Ulf Hansson:
"MMC core:
- Add new API to set VCCQ voltage - mmc_regulator_set_vqmmc()
- Add new ioctl to allow userspace to send multi commands
- Wait for card busy signalling before starting SDIO requests
- Remove MMC_CLKGATE
- Enable tuning for DDR50 mode
- Some code clean-up/improvements to mmc pwrseq
- Use highest priority for eMMC restart handler
- Add DT bindings for eMMC hardware reset support
- Extend the mmc_send_tuning() API
- Improve ios show for debugfs
- A couple of code optimizations
MMC host:
- Some generic OF improvements
- Various code clean-ups
- sirf: Add support for DDR50
- sunxi: Add support for card busy detection
- mediatek: Use MMC_CAP_RUNTIME_RESUME
- mediatek: Add support for eMMC HW-reset
- mediatek: Add support for HS400
- dw_mmc: Convert to use the new mmc_regulator_set_vqmmc() API
- dw_mmc: Add external DMA interface support
- dw_mmc: Some various improvements
- dw_mmc-rockchip: MMC tuning with the clock phase framework
- sdhci: Properly clear IRQs during resume
- sdhci: Enable tuning for DDR50 mode
- sdhci-of-esdhc: Use IRQ mode for card detection
- sdhci-of-esdhc: Support both BE and LE host controller
- sdhci-pci: Build o2micro support in the same module
- sdhci-pci: Support for new Intel host controllers
- sdhci-acpi: Support for new Intel host controllers"
* tag 'mmc-v4.4' of git://git.linaro.org/people/ulf.hansson/mmc: (73 commits)
mmc: dw_mmc: fix the wrong setting for UHS-DDR50 mode
mmc: dw_mmc: fix the CardThreshold boundary at CardThrCtl register
mmc: dw_mmc: NULL dereference in error message
mmc: pwrseq: Use highest priority for eMMC restart handler
mmc: mediatek: add HS400 support
mmc: mmc: extend the mmc_send_tuning()
mmc: mediatek: add implement of ops->hw_reset()
mmc: mediatek: fix got GPD checksum error interrupt when data transfer
mmc: mediatek: change the argument "ddr" to "timing"
mmc: mediatek: make cmd_ints_mask to const
mmc: dt-bindings: update Mediatek MMC bindings
mmc: core: Add DT bindings for eMMC hardware reset support
mmc: omap_hsmmc: Enable omap_hsmmc for Keystone 2
mmc: sdhci-acpi: Add more ACPI HIDs for Intel controllers
mmc: sdhci-pci: Add more PCI IDs for Intel controllers
arm: lpc18xx_defconfig: remove CONFIG_MMC_DW_IDMAC
arm: hisi_defconfig: remove CONFIG_MMC_DW_IDMAC
arm: exynos_defconfig: remove CONFIG_MMC_DW_IDMAC
arc: axs10x_defconfig: remove CONFIG_MMC_DW_IDMAC
mips: pistachio_defconfig: remove CONFIG_MMC_DW_IDMAC
...
New driver for MAX31790, added support for TMP75C, as well as cleanups
and minor improvements in various drivers.
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Merge tag 'hwmon-for-linus-v4.4' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging
Pull hwmon updates from Guenter Roeck:
"New driver for MAX31790, added support for TMP75C, as well as cleanups
and minor improvements in various drivers"
* tag 'hwmon-for-linus-v4.4' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging:
hwmon: (fam15h_power) Add max compute unit accumulated power
hwmon: (fam15h_power) Enable power1_input on AMD Carrizo
hwmon: (fam15h_power) Refactor attributes for dynamically added
hwmon: (ina2xx) remove no longer used variable 'kind'
hwmon: (nct6775) Introduce separate temperature labels for NCT6792 and NCT6793
hwmon: (nct6775) NCT6791D and NCT6792D have an additional temperature source
hwmon: (ina2xx) give precedence to DT over checking for platform data.
hwmon: (ina2xx) convert driver to using regmap
hwmon: (coretemp) Increase limit of maximum core ID from 32 to 128.
hwmon: (lm75) Add support for TMP75C
hwmon: (ibmpowernv) Add OF compatibility table entry
hwmon: (abx500) drop the use of IRQF_NO_SUSPEND
hwmon: (max31790) Fix dereference of ERR_PTR
hwmon: Driver for Maxim MAX31790
There are a bunch of drivers that utilize the "ngpios" DT property
without any vendor prefix. Try to start cleaning up the mess by
defining what we mean by this property.
Cc: devicetree@vger.kernel.org
Cc: Pramod Kumar <pramodku@broadcom.com>
Cc: Jonas Gorski <jogo@openwrt.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Pull networking fixes from David Miller:
1) Fix two regressions in ipv6 route lookups, particularly wrt output
interface specifications in the lookup key. From David Ahern.
2) Fix checks in ipv6 IPSEC tunnel pre-encap fragmentation, from
Herbert Xu.
3) Fix mis-advertisement of 1000BASE-T on bcm63xx_enet, from Simon
Arlott.
4) Some smsc phys misbehave with energy detect mode enabled, so add a
DT property and disable it on such switches. From Heiko Schocher.
5) Fix TSO corruption on TX in mv643xx_eth, from Philipp Kirchhofer.
6) Fix regression added by removal of openvswitch vport stats, from
James Morse.
7) Vendor Kconfig options should be bool, not tristate, from Andreas
Schwab.
8) Use non-_BH() net stats bump in tcp_xmit_probe_skb(), otherwise we
barf during TCP REPAIR operations.
9) Fix various bugs in openvswitch conntrack support, from Joe
Stringer.
10) Fix NETLINK_LIST_MEMBERSHIPS locking, from David Herrmann.
11) Don't have VSOCK do sock_put() in interrupt context, from Jorgen
Hansen.
12) Fix skb_realloc_headroom() failures properly in ISDN, from Karsten
Keil.
13) Add some device IDs to qmi_wwan, from Bjorn Mork.
14) Fix ovs egress tunnel information when using lwtunnel devices, from
Pravin B Shelar.
15) Add missing NETIF_F_FRAGLIST to macvtab feature list, from Jason
Wang.
16) Fix incorrect handling of throw routes when the result of the throw
cannot find a match, from Xin Long.
17) Protect ipv6 MTU calculations from wrap-around, from Hannes Frederic
Sowa.
18) Fix failed autonegotiation on KSZ9031 micrel PHYs, from Nathan
Sullivan.
19) Add missing memory barries in descriptor accesses or xgbe driver,
from Thomas Lendacky.
20) Fix release conditon test in pppoe_release(), from Guillaume Nault.
21) Fix gianfar bugs wrt filter configuration, from Claudiu Manoil.
22) Fix violations of RX buffer alignment in sh_eth driver, from Sergei
Shtylyov.
23) Fixing missing of_node_put() calls in various places around the
networking, from Julia Lawall.
24) Fix incorrect leaf now walking in ipv4 routing tree, from Alexander
Duyck.
25) RDS doesn't check pskb_pull()/pskb_trim() return values, from
Sowmini Varadhan.
26) Fix VLAN configuration in mlx4 driver, from Jack Morgenstein.
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (79 commits)
ipv6: protect mtu calculation of wrap-around and infinite loop by rounding issues
Revert "Merge branch 'ipv6-overflow-arith'"
net/mlx4: Copy/set only sizeof struct mlx4_eqe bytes
net/mlx4_en: Explicitly set no vlan tags in WQE ctrl segment when no vlan is present
vhost: fix performance on LE hosts
bpf: sample: define aarch64 specific registers
amd-xgbe: Fix race between access of desc and desc index
RDS-TCP: Recover correctly from pskb_pull()/pksb_trim() failure in rds_tcp_data_recv
forcedeth: fix unilateral interrupt disabling in netpoll path
openvswitch: Fix skb leak using IPv6 defrag
ipv6: Export nf_ct_frag6_consume_orig()
openvswitch: Fix double-free on ip_defrag() errors
fib_trie: leaf_walk_rcu should not compute key if key is less than pn->key
net: mv643xx_eth: add missing of_node_put
ath6kl: add missing of_node_put
net: phy: mdio: add missing of_node_put
netdev/phy: add missing of_node_put
net: netcp: add missing of_node_put
net: thunderx: add missing of_node_put
ipv6: gre: support SIT encapsulation
...
HW and driver support the GPIO as interrupt-controller.
Document that in the DT binding.
Signed-off-by: Soren Brinkmann <soren.brinkmann@xilinx.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This new compatible string, "brcm,iproc-gpio", should be used for
all new iproc-based future SoCs.
Signed-off-by: Pramod Kumar <pramodku@broadcom.com>
Reviewed-by: Ray Jui <rjui@broadcom.com>
Reviewed-by: Scott Branden <sbranden@broadcom.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
If GPIO controller's pins are muxed, pin-controller subsystem
need to be intimated by defining mapping between gpio and
pinmux controller. This patch adds required properties to
define this mapping via DT.
Signed-off-by: Pramod Kumar <pramodku@broadcom.com>
Reviewed-by: Ray Jui <rjui@broadcom.com>
Reviewed-by: Scott Branden <sbranden@broadcom.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Sometime only need set MMC_CAP_HW_RESET for one of MMC hosts,
So set it in device tree is better.
Signed-off-by: Chaotian Jing <chaotian.jing@mediatek.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
synopsys-dw-mshc supports three types of transfer mode. We add
bindings and description for how to use them at runtime.
Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Renesas R8A7794 SoC also has the MMCIF controller.
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Acked-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
The "compatible" property text contradicts even the example given in the MMCIF
binding document itself; moreover, the Renesas MMCIF driver only matches on
the generic "compatible" string and doesn't look for the SoC specific strings
at all. Thus describe "renesas,sh-mmcif" as a fallback value.
Fixes: b4c27763d7 ("mmc: sh_mmcif: Document DT bindings")
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Acked-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Add ciu_drive, ciu_sample clocks and default-sample-phase. This will later
be used by tuning code.
We do not touch ciu_drive (and by extension define default-drive-phase).
Drive phase is mostly used to define minimum hold times, while one could
write some code to determine what phase meets the minimum hold time
(ex 10 degrees) this will not work with the current clock phase framework
(which floors angles, so we'll get 0 deg, and there's no way to know what
resolution the floors happen at). We assume that the default drive angles
set by the hardware are good enough.
Signed-off-by: Alexandru M Stan <amstan@chromium.org>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Acked-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
MMC_CLKGATE was once invented to save power by gating the bus clock at
request inactivity. At that time it served its purpose. The modern way to
deal with power saving for these scenarios, is by using runtime PM.
Nowadays, several host drivers have deployed runtime PM, but for those
that haven't and which still cares power saving at request inactivity,
it's certainly time to deploy runtime PM as it has been around for several
years now.
To simplify code to mmc core and thus decrease maintenance efforts, this
patch removes all code related to MMC_CLKGATE.
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
On some boards the energy enable detect mode leads in
trouble with some switches, so make the enabling of
this mode configurable through DT.
Signed-off-by: Heiko Schocher <hs@denx.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
add the ability to parse "phy-handle". This
is needed for phys, which have a DT node, and
need to parse DT properties.
Signed-off-by: Heiko Schocher <hs@denx.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Add some information about real time compliance to the driver document.
Inspired by Grygorii Strashko's real time compliance patches.
Cc: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Pull RCU updates from Paul E. McKenney:
- Miscellaneous fixes. (Paul E. McKenney, Boqun Feng, Oleg Nesterov, Patrick Marlier)
- Improvements to expedited grace periods. (Paul E. McKenney)
- Performance improvements to and locktorture tests for percpu-rwsem.
(Oleg Nesterov, Paul E. McKenney)
- Torture-test changes. (Paul E. McKenney, Davidlohr Bueso)
- Documentation updates. (Paul E. McKenney)
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Add berlin4ct to existing berlin pinctrl device tree binding.
Signed-off-by: Jisheng Zhang <jszhang@marvell.com>
Acked-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Acked-by: Antoine Tenart <antoine.tenart@free-electrons.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Currently msi-parent is used by a few bindings to describe the
relationship between a PCI root complex and a single MSI controller, but
this property does not have a generic binding document.
Additionally, msi-parent is insufficient to describe more complex
relationships between MSI controllers and devices under a root complex,
where devices may be able to target multiple MSI controllers, or where
MSI controllers use (non-probeable) sideband information to distinguish
devices.
This patch adds a generic binding for mapping PCI devices to MSI
controllers. This document covers msi-parent, and a new msi-map property
(specific to PCI*) which may be used to map devices (identified by their
Requester ID) to sideband data for each MSI controller that they may
target.
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: David Daney <david.daney@cavium.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
The TMP75C has a different control register layout and only supports
12-bit temperature samples (0.0625 deg C).
The continuous sample rate is ~12 Hz.
Signed-off-by: Ben Gardner <gardner.ben@gmail.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
non-modular by ripping out the module_* code since Kconfig doesn't
allow it to be built as a module anyway - Paul Gortmaker
* Make the x86 efi=debug kernel parameter, which enables EFI debug
code and output, generic and usable by arm64 - Leif Lindholm
* Add support to the x86 EFI boot stub for 64-bit Graphics Output
Protocol frame buffer addresses - Matt Fleming
* Detect when the UEFI v2.5 EFI_PROPERTIES_TABLE feature is enabled
in the firmware and set an efi.flags bit so the kernel knows when
it can apply more strict runtime mapping attributes - Ard Biesheuvel
* Auto-load the efi-pstore module on EFI systems, just like we
currently do for the efivars module - Ben Hutchings
* Add "efi_fake_mem" kernel parameter which allows the system's EFI
memory map to be updated with additional attributes for specific
memory ranges. This is useful for testing the kernel code that handles
the EFI_MEMORY_MORE_RELIABLE memmap bit even if your firmware
doesn't include support - Taku Izumi
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Merge tag 'efi-next' of git://git.kernel.org/pub/scm/linux/kernel/git/mfleming/efi into core/efi
Pull v4.4 EFI updates from Matt Fleming:
- Make the EFI System Resource Table (ESRT) driver explicitly
non-modular by ripping out the module_* code since Kconfig doesn't
allow it to be built as a module anyway. (Paul Gortmaker)
- Make the x86 efi=debug kernel parameter, which enables EFI debug
code and output, generic and usable by arm64. (Leif Lindholm)
- Add support to the x86 EFI boot stub for 64-bit Graphics Output
Protocol frame buffer addresses. (Matt Fleming)
- Detect when the UEFI v2.5 EFI_PROPERTIES_TABLE feature is enabled
in the firmware and set an efi.flags bit so the kernel knows when
it can apply more strict runtime mapping attributes - Ard Biesheuvel
- Auto-load the efi-pstore module on EFI systems, just like we
currently do for the efivars module. (Ben Hutchings)
- Add "efi_fake_mem" kernel parameter which allows the system's EFI
memory map to be updated with additional attributes for specific
memory ranges. This is useful for testing the kernel code that handles
the EFI_MEMORY_MORE_RELIABLE memmap bit even if your firmware
doesn't include support. (Taku Izumi)
Note: there is a semantic conflict between the following two commits:
8a53554e12 ("x86/efi: Fix multiple GOP device support")
ae2ee627dc ("efifb: Add support for 64-bit frame buffer addresses")
I fixed up the interaction in the merge commit, changing the type of
current_fb_base from u32 to u64.
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Update the IRQ domain documentation to reflect the changes made
while divorcing the domain infrastructure from Device Tree.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Tested-by: Hanjun Guo <hanjun.guo@linaro.org>
Tested-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: <linux-arm-kernel@lists.infradead.org>
Cc: Tomasz Nowicki <tomasz.nowicki@linaro.org>
Cc: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>
Cc: Graeme Gregory <graeme@xora.org.uk>
Cc: Jake Oshins <jakeo@microsoft.com>
Cc: Jiang Liu <jiang.liu@linux.intel.com>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Rafael J. Wysocki <rjw@rjwysocki.net>
Link: http://lkml.kernel.org/r/1444737105-31573-18-git-send-email-marc.zyngier@arm.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Earlier the PBIAS regulator was optional, not so with recent
omap_hsmmc changes. To make things easier for people with
custom .config files, let's add minimal documentation for it
as suggested by Russell King <rmk+kernel@arm.linux.org.uk>.
Signed-off-by: Tony Lindgren <tony@atomide.com>
This patch introduces new boot option named "efi_fake_mem".
By specifying this parameter, you can add arbitrary attribute
to specific memory range.
This is useful for debugging of Address Range Mirroring feature.
For example, if "efi_fake_mem=2G@4G:0x10000,2G@0x10a0000000:0x10000"
is specified, the original (firmware provided) EFI memmap will be
updated so that the specified memory regions have
EFI_MEMORY_MORE_RELIABLE attribute (0x10000):
<original>
efi: mem36: [Conventional Memory| | | | | | |WB|WT|WC|UC] range=[0x0000000100000000-0x00000020a0000000) (129536MB)
<updated>
efi: mem36: [Conventional Memory| |MR| | | | |WB|WT|WC|UC] range=[0x0000000100000000-0x0000000180000000) (2048MB)
efi: mem37: [Conventional Memory| | | | | | |WB|WT|WC|UC] range=[0x0000000180000000-0x00000010a0000000) (61952MB)
efi: mem38: [Conventional Memory| |MR| | | | |WB|WT|WC|UC] range=[0x00000010a0000000-0x0000001120000000) (2048MB)
efi: mem39: [Conventional Memory| | | | | | |WB|WT|WC|UC] range=[0x0000001120000000-0x00000020a0000000) (63488MB)
And you will find that the following message is output:
efi: Memory: 4096M/131455M mirrored memory
Signed-off-by: Taku Izumi <izumi.taku@jp.fujitsu.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Xishi Qiu <qiuxishi@huawei.com>
Cc: Kamezawa Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
Now that we have an efi=debug command line option in the core code, use
this instead of the arm64-specific uefi_debug option.
Signed-off-by: Leif Lindholm <leif.lindholm@linaro.org>
Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Tested-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Mark Salter <msalter@redhat.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
