mirror of https://gitee.com/openkylin/linux.git
291 Commits
| Author | SHA1 | Message | Date |
|---|---|---|---|
Linus Torvalds
|
d26f552ebb |
- New Drivers
- Freescale MXS Low Resolution ADC
- Freescale i.MX23/i.MX28 LRADC touchscreen
- Motorola CPCAP Power Button
- TI LMU (Lighting Management Unit)
- Atmel SMC (Static Memory Controller)
- New Device Support
- Add support for X-Powers AXP803 to axp20x
- Add support for Dialog Semi DA9061 to da9062-core
- Add support for Intel Cougar Mountain to lpc_ich
- Add support for Intel Gemini Lake to lpc_ich
- New Functionality
- Add Device Tree support; wm831x-*, axp20x, ti-lmu, da9062, sun4i-gpadc
- Add IRQ sense support; motorola-cpcap
- Add ACPI support; cros_ec
- Add Reset support; altera-a10sr
- Add ADC support; axp20x
- Add AC Power support; axp20x
- Add Runtime PM support; atmel-ebi, exynos-lpass
- Add Battery Power Supply support; axp20x
- Add Clock support; exynos-lpass, hi655x-pmic
- Fix-ups
- Implicitly specify required headers; motorola-cpcap, intel_soc_pmic_bxtwc
- Add .remove() method; stm32-timers, exynos-lpass
- Remove unused code; intel_soc_pmic_core, intel-lpss-acpi, ipaq-micro, atmel-smc, menelaus
- Rename variables for clarity; axp20x
- Convert pr_warning() to pr_warn(); db8500-prcmu, sta2x11-mfd, twl4030-power
- Improve formatting; arizona-core, axp20x
- Use raw_spinlock_*() variants; asic3, t7l66xb, tc6393xb
- Simplify/refactor code; arizona-core, atmel-ebi
- Improve error checking; intel_soc_pmic_core
- Bug Fixes
- Ensure OMAP3630/3730 boards can successfully reboot; twl4030-power
- Correct max-register value; stm32-timers
- Extend timeout to account for clock stretching; cros_ec_spi
- Use correct IRQ trigger type; motorola-cpcap
- Fix bad use of IRQ sense register; motorola-cpcap
- Logic error "||" should be "&&"; mxs-lradc-ts
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Merge tag 'mfd-next-4.12' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd
Pull MFD updates from Lee Jones:
"New Drivers:
- Freescale MXS Low Resolution ADC
- Freescale i.MX23/i.MX28 LRADC touchscreen
- Motorola CPCAP Power Button
- TI LMU (Lighting Management Unit)
- Atmel SMC (Static Memory Controller)
New Device Support:
- Add support for X-Powers AXP803 to axp20x
- Add support for Dialog Semi DA9061 to da9062-core
- Add support for Intel Cougar Mountain to lpc_ich
- Add support for Intel Gemini Lake to lpc_ich
New Functionality:
- Add Device Tree support; wm831x-*, axp20x, ti-lmu, da9062, sun4i-gpadc
- Add IRQ sense support; motorola-cpcap
- Add ACPI support; cros_ec
- Add Reset support; altera-a10sr
- Add ADC support; axp20x
- Add AC Power support; axp20x
- Add Runtime PM support; atmel-ebi, exynos-lpass
- Add Battery Power Supply support; axp20x
- Add Clock support; exynos-lpass, hi655x-pmic
Fix-ups:
- Implicitly specify required headers; motorola-cpcap, intel_soc_pmic_bxtwc
- Add .remove() method; stm32-timers, exynos-lpass
- Remove unused code; intel_soc_pmic_core, intel-lpss-acpi, ipaq-micro, atmel-smc, menelaus
- Rename variables for clarity; axp20x
- Convert pr_warning() to pr_warn(); db8500-prcmu, sta2x11-mfd, twl4030-power
- Improve formatting; arizona-core, axp20x
- Use raw_spinlock_*() variants; asic3, t7l66xb, tc6393xb
- Simplify/refactor code; arizona-core, atmel-ebi
- Improve error checking; intel_soc_pmic_core
Bug Fixes:
- Ensure OMAP3630/3730 boards can successfully reboot; twl4030-power
- Correct max-register value; stm32-timers
- Extend timeout to account for clock stretching; cros_ec_spi
- Use correct IRQ trigger type; motorola-cpcap
- Fix bad use of IRQ sense register; motorola-cpcap
- Logic error "||" should be "&&"; mxs-lradc-ts"
* tag 'mfd-next-4.12' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd: (79 commits)
input: touchscreen: mxs-lradc: || vs && typos
dt-bindings: Add AXP803's regulator info
mfd: axp20x: Support AXP803 variant
dt-bindings: Add device tree binding for X-Powers AXP803 PMIC
dt-bindings: Make AXP20X compatible strings one per line
mfd: intel_soc_pmic_core: Fix unchecked return value
mfd: menelaus: Remove obsolete local_irq_disable() and local_irq_enable()
mfd: omap-usb-tll: Configure ULPIAUTOIDLE
mfd: omap-usb-tll: Fix inverted bit use for USB TLL mode
mfd: palmas: Fixed spelling mistake in error message
mfd: lpc_ich: Add support for Intel Gemini Lake SoC
mfd: hi655x: Add the clock cell to provide WiFi and Bluetooth
mfd: intel_soc_pmic: Fix a mess with compilation units
mfd: exynos-lpass: Add runtime PM support
mfd: exynos-lpass: Add missing remove() function
mfd: exynos-lpass: Add support for clocks
mfd: exynos-lpass: Remove pad retention control
iio: adc: add support for X-Powers AXP20X and AXP22X PMICs ADCs
mfd: cpcap: Fix bad use of IRQ sense register
mfd: cpcap: Use ack_invert interrupts
...
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Linus Torvalds
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3711c94fd6 |
Merge branch 'efi-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull EFI updates from Ingo Molnar:
"The main changes in this cycle were:
- move BGRT handling to drivers/acpi so it can be shared between x86
and ARM
- bring the EFI stub's initrd and FDT allocation logic in line with
the latest changes to the arm64 boot protocol
- improvements and fixes to the EFI stub's command line parsing
routines
- randomize the virtual mapping of the UEFI runtime services on
ARM/arm64
- ... and other misc enhancements, cleanups and fixes"
* 'efi-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
efi/libstub/arm: Don't use TASK_SIZE when randomizing the RT space
ef/libstub/arm/arm64: Randomize the base of the UEFI rt services region
efi/libstub/arm/arm64: Disable debug prints on 'quiet' cmdline arg
efi/libstub: Unify command line param parsing
efi/libstub: Fix harmless command line parsing bug
efi/arm32-stub: Allow boot-time allocations in the vmlinux region
x86/efi: Clean up a minor mistake in comment
efi/pstore: Return error code (if any) from efi_pstore_write()
efi/bgrt: Enable ACPI BGRT handling on arm64
x86/efi/bgrt: Move efi-bgrt handling out of arch/x86
efi/arm-stub: Round up FDT allocation to mapping size
efi/arm-stub: Correct FDT and initrd allocation rules for arm64
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Linus Torvalds
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08be881064 |
ACPI updates for v4.12-rc1
- Update the core device enumeration code to make it more internally
consistent and robust and drop the force_remove sysfs attribute
that could be used to tell it to ignore errors on device
hot-removal which was dangerous in general and no real and
still relevant use cases for it could be found (Rafael Wysocki,
Michal Hocko).
- Make the core device enumeration code use _PXM to associate
platform devices created by it with specific NUMA nodes (Shanker
Donthineni).
- Extend the CPPC library by adding more sysfs entries for
performance capabilities to it and making it use the lowest
nonlinear performance parameter (Prashanth Prakash).
- Make the CPU online more consistent with CPU initialization in
the ACPI processor driver (Prashanth Prakash).
- Update the AC and battery drivers to help them avoid attaching to
devices that cannot be handled by them and update the axp288_charger
power supply driver to work correctly on ACPI systems without the
INT3496 device (Hans de Goede).
- Add an ACPI operation region driver for the Intel CHT Whiskey Cove
PMIC and update the xpower operation region driver to work without
IIO which isn't really necessary for it to work (Hans de Goede).
- Add a new entry for Dell Inspiron 7537 to the _REV quirk blacklist
(Kai Heng Feng).
- Make the code in the ACPI video driver easier to follow by adding
symbols and comments to it (Dmitry Frank).
- Update ACPI documentation and drop a function that has no users
from the tables-handling code (Cao jin, Baoquan He).
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Merge tag 'acpi-4.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull ACPI updates from Rafael Wysocki:
"These are some device enumeration code changes, updates of the AC and
battery drivers to help them avoid attaching to devices that cannot be
handled by them, new operation region driver for the Intel CHT Whiskey
Cove PMIC, new sysfs entries for CPPC performance capabilities, a new
_REV quirk blacklist entry and a couple of assorted minor fixes and
cleanups.
Specifics:
- Update the core device enumeration code to make it more internally
consistent and robust and drop the force_remove sysfs attribute
that could be used to tell it to ignore errors on device
hot-removal which was dangerous in general and no real and still
relevant use cases for it could be found (Rafael Wysocki, Michal
Hocko).
- Make the core device enumeration code use _PXM to associate
platform devices created by it with specific NUMA nodes (Shanker
Donthineni).
- Extend the CPPC library by adding more sysfs entries for
performance capabilities to it and making it use the lowest
nonlinear performance parameter (Prashanth Prakash).
- Make the CPU online more consistent with CPU initialization in the
ACPI processor driver (Prashanth Prakash).
- Update the AC and battery drivers to help them avoid attaching to
devices that cannot be handled by them and update the
axp288_charger power supply driver to work correctly on ACPI
systems without the INT3496 device (Hans de Goede).
- Add an ACPI operation region driver for the Intel CHT Whiskey Cove
PMIC and update the xpower operation region driver to work without
IIO which isn't really necessary for it to work (Hans de Goede).
- Add a new entry for Dell Inspiron 7537 to the _REV quirk blacklist
(Kai Heng Feng).
- Make the code in the ACPI video driver easier to follow by adding
symbols and comments to it (Dmitry Frank).
- Update ACPI documentation and drop a function that has no users
from the tables-handling code (Cao jin, Baoquan He)"
* tag 'acpi-4.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
ACPI / PMIC: Stop xpower OPRegion handler relying on IIO
ACPI / PMIC: Add opregion driver for Intel CHT Whiskey Cove PMIC
ACPI / scan: Avoid enumerating devices more than once
ACPI / scan: Apply default enumeration to devices with ACPI drivers
power: supply: axp288_charger: Only wait for INT3496 device if present
ACPI / AC: Add a blacklist with PMIC ACPI HIDs with a native charger driver
ACPI / battery: Add a blacklist with PMIC ACPI HIDs with a native battery driver
ACPI / battery: Fix acpi_battery_exit on acpi_battery_init_async errors
ACPI / utils: Add new acpi_dev_present helper
ACPI / video: add comments about subtle cases
ACPI / video: get rid of magic numbers and use enum instead
ACPI / doc: linuxized-acpica.txt: fix typos
ACPI / blacklist: add _REV quirk for Dell Inspiron 7537
ACPI / tables: Drop acpi_parse_entries() which is not used
ACPI / CPPC: add sysfs entries for CPPC perf capabilities
ACPI / CPPC: Read lowest nonlinear perf in cppc_get_perf_caps()
ACPI / platform: Update platform device NUMA node based on _PXM method
ACPI / Processor: Drop setup_max_cpus check from acpi_processor_add()
ACPI / scan: Drop support for force_remove
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Linus Torvalds
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6fb41cbd7d |
A few fixes of things in the IPMI area, the watchdog
would have issues at panic time cause by a recently introduced change, a problem with device numbering, one possible panic in the I2C driver (destined for stable). Nothing earth-shattering, but some things that need to go in. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iEYEABECAAYFAlkHLe4ACgkQIXnXXONXERctaACgtLPKwEc8IGFcdpQ6njZAJXm/ eNgAoIRDUTO3SstAWVtanbUEG8ao74gB =3InS -----END PGP SIGNATURE----- Merge tag 'for-linux-4.12' of git://github.com/cminyard/linux-ipmi Pull IPMI updates from Corey Minyard: "A few fixes of things in the IPMI area, the watchdog would have issues at panic time cause by a recently introduced change, a problem with device numbering, one possible panic in the I2C driver (destined for stable). Nothing earth-shattering, but some things that need to go in" * tag 'for-linux-4.12' of git://github.com/cminyard/linux-ipmi: ipmi/watchdog: fix wdog hang on panic waiting for ipmi response ipmi_si: use smi_num for init_name ipmi: bt-bmc: Add ast2500 compatible string ACPI / IPMI: change warning to debug on timeout ACPI / IPMI: allow ACPI_IPMI with IPMI_SSIF ipmi_ssif: use setup_timer ipmi: Fix kernel panic at ipmi_ssif_thread() |
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Andy Shevchenko
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b5238b4185 |
mfd: intel_soc_pmic: Fix a mess with compilation units
Crystal Cove and Whiskey Cove are two different PMICs which are
installed on Intel Atom SoC based platforms.
Moreover there are two independent drivers that by some reason were
supposed (*) to get into one kernel module.
Fix the mess by clarifying Kconfig option for Crystal Cove and split
Whiskey Cove out of it.
(*) It looks like the configuration was never tested with
INTEL_SOC_PMIC=n. The line in Makefile is actually wrong.
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net> (supporter:ACPI)
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
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Hans de Goede
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2e5a7f7109 |
ACPI / PMIC: Stop xpower OPRegion handler relying on IIO
The intel_pmic_xpower code provides an OPRegion handler, which must be available before other drivers using it are loaded, which can only be ensured if both the mfd and opregion drivers are built in, which is why the Kconfig option for intel_pmic_xpower is a bool. The use of IIO is causing trouble for generic distro configs here as distros will typically want to build IIO drivers as modules and there really is no reason to use IIO here. The reading of the ADC value is a single regmap_bulk_read, which is already protected against races by the regmap-lock. This commit removes the use of IIO, allowing distros to enable the driver without needing to built IIO in and also actually simplifies the code. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> |
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Hans de Goede
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ac2c4936e9 |
ACPI / PMIC: Add opregion driver for Intel CHT Whiskey Cove PMIC
Add opregion driver for Intel CHT Whiskey Cove PMIC, based on various non upstreamed CHT Whiskey Cove PMIC patches. This does not include support for the Thermal opregion (DPTF) due to lacking documentation. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> |
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Borislav Petkov
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e3c4ff6d8c |
EDAC: Remove EDAC_MM_EDAC
Move all the EDAC core functionality behind CONFIG_EDAC and get rid of that indirection. Update defconfigs which had it. While at it, fix dependencies such that EDAC depends on RAS for the tracepoints. Signed-off-by: Borislav Petkov <bp@suse.de> Cc: linux-arm-kernel@lists.infradead.org Cc: linuxppc-dev@lists.ozlabs.org Cc: Chris Metcalf <cmetcalf@mellanox.com> Cc: linux-edac@vger.kernel.org |
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Borislav Petkov
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9613916b02 |
ACPI/extlog: Add EDAC dependency
We are calling EDAC functions - make the proper dependencies explicit. Signed-off-by: Borislav Petkov <bp@suse.de> Cc: linux-acpi@vger.kernel.org |
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Sinan Kaya
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50121beba5 |
ACPI / IPMI: allow ACPI_IPMI with IPMI_SSIF
ACPI_IPMI driver currently depends on IPMI System Interface (IPMI_SI) driver to be enabled. IPMI_SI driver only handles KCS, SMIC and BT BMC interfaces. IPMI_SSIF is an alternative BMC communication method. It allows BMC to be accessed over an I2C bus instead of a standard interface. Change the dependency to IPMI_HANDLER so that ACPI_IPMI works with all IPMI providers. Signed-off-by: Sinan Kaya <okaya@codeaurora.org> Signed-off-by: Corey Minyard <cminyard@mvista.com> Acked-by: Rafael J. Wysocki <rjw@rjwysocki.net> |
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Bhupesh Sharma
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6e7300cff1 |
efi/bgrt: Enable ACPI BGRT handling on arm64
Now that the ACPI BGRT handling code has been made generic, we can enable it for arm64. Signed-off-by: Bhupesh Sharma <bhsharma@redhat.com> [ Updated commit log to reflect that BGRT is only enabled for arm64, and added missing 'return' statement to the dummy acpi_parse_bgrt() function. ] Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Matt Fleming <matt@codeblueprint.co.uk> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-efi@vger.kernel.org Link: http://lkml.kernel.org/r/20170404160245.27812-8-ard.biesheuvel@linaro.org Signed-off-by: Ingo Molnar <mingo@kernel.org> |
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Linus Torvalds
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a9042defa2 |
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
Pull trivial updates from Jiri Kosina. * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: NTB: correct ntb_spad_count comment typo misc: ibmasm: fix typo in error message Remove references to dead make variable LINUX_INCLUDE Remove last traces of ikconfig.h treewide: Fix printk() message errors Documentation/device-mapper: s/getsize/getsz/ |
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Masanari Iida
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9165dabb25 |
treewide: Fix printk() message errors
This patch fix spelling typos in printk and kconfig. Signed-off-by: Masanari Iida <standby24x7@gmail.com> Acked-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Jiri Kosina <jkosina@suse.cz> |
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Mauro Carvalho Chehab
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8c27ceff36 |
docs: fix locations of several documents that got moved
The previous patch renamed several files that are cross-referenced along the Kernel documentation. Adjust the links to point to the right places. Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com> |
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Linus Torvalds
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e6dce825fb |
TTY/Serial patches for 4.9-rc1
Here is the big TTY and Serial patch set for 4.9-rc1. It also includes some drivers/dma/ changes, as those were needed by some serial drivers, and they were all acked by the DMA maintainer. Also in here is the long-suffering ACPI SPCR patchset, which was passed around from maintainer to maintainer like a hot-potato. Seems I was the sucker^Wlucky one. All of those patches have been acked by the various subsystem maintainers as well. All of this has been in linux-next with no reported issues. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> -----BEGIN PGP SIGNATURE----- iFYEABECABYFAlfyNjEPHGdyZWdAa3JvYWguY29tAAoJEDFH1A3bLfspwIcAn2uN qCD8xQJ0Cs61hD1nUzhNygG8AJ94I4zz/fPGpyh/CtJfLQwtUdLhNA== =Rken -----END PGP SIGNATURE----- Merge tag 'tty-4.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty Pull tty and serial updates from Greg KH: "Here is the big tty and serial patch set for 4.9-rc1. It also includes some drivers/dma/ changes, as those were needed by some serial drivers, and they were all acked by the DMA maintainer. Also in here is the long-suffering ACPI SPCR patchset, which was passed around from maintainer to maintainer like a hot-potato. Seems I was the sucker^Wlucky one. All of those patches have been acked by the various subsystem maintainers as well. All of this has been in linux-next with no reported issues" * tag 'tty-4.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (111 commits) Revert "serial: pl011: add console matching function" MAINTAINERS: update entry for atmel_serial driver serial: pl011: add console matching function ARM64: ACPI: enable ACPI_SPCR_TABLE ACPI: parse SPCR and enable matching console of/serial: move earlycon early_param handling to serial Revert "drivers/tty: Explicitly pass current to show_stack" tty: amba-pl011: Don't complain on -EPROBE_DEFER when no irq nios2: dts: 10m50: Add tx-threshold parameter serial: 8250: Set Altera 16550 TX FIFO Threshold serial: 8250: of: Load TX FIFO Threshold from DT Documentation: dt: serial: Add TX FIFO threshold parameter drivers/tty: Explicitly pass current to show_stack serial: imx: Fix DCD reading serial: stm32: mark symbols static where possible serial: xuartps: Add some register initialisation to cdns_early_console_setup() serial: xuartps: Removed unwanted checks while reading the error conditions serial: xuartps: Rewrite the interrupt handling logic serial: stm32: use mapbase instead of membase for DMA tty/serial: atmel: fix fractional baud rate computation ... |
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Linus Torvalds
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999dcbe241 |
Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull irq updates from Thomas Gleixner:
"The irq departement proudly presents:
- A rework of the core infrastructure to optimally spread interrupt
for multiqueue devices. The first version was a bit naive and
failed to take thread siblings and other details into account.
Developed in cooperation with Christoph and Keith.
- Proper delegation of softirqs to ksoftirqd, so if ksoftirqd is
active then no further softirq processsing on interrupt return
happens. Otherwise we try to delegate and still run another batch
of network packets in the irq return path, which then tries to
delegate to ksoftirqd .....
- A proper machine parseable sysfs based alternative for
/proc/interrupts.
- ACPI support for the GICV3-ITS and ARM interrupt remapping
- Two new irq chips from the ARM SoC zoo: STM32-EXTI and MVEBU-PIC
- A new irq chip for the JCore (SuperH)
- The usual pile of small fixlets in core and irqchip drivers"
* 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (42 commits)
softirq: Let ksoftirqd do its job
genirq: Make function __irq_do_set_handler() static
ARM/dts: Add EXTI controller node to stm32f429
ARM/STM32: Select external interrupts controller
drivers/irqchip: Add STM32 external interrupts support
Documentation/dt-bindings: Document STM32 EXTI controller bindings
irqchip/mips-gic: Use for_each_set_bit to iterate over local IRQs
pci/msi: Retrieve affinity for a vector
genirq/affinity: Remove old irq spread infrastructure
genirq/msi: Switch to new irq spreading infrastructure
genirq/affinity: Provide smarter irq spreading infrastructure
genirq/msi: Add cpumask allocation to alloc_msi_entry
genirq: Expose interrupt information through sysfs
irqchip/gicv3-its: Use MADT ITS subtable to do PCI/MSI domain initialization
irqchip/gicv3-its: Factor out PCI-MSI part that might be reused for ACPI
irqchip/gicv3-its: Probe ITS in the ACPI way
irqchip/gicv3-its: Refactor ITS DT init code to prepare for ACPI
irqchip/gicv3-its: Cleanup for ITS domain initialization
PCI/MSI: Setup MSI domain on a per-device basis using IORT ACPI table
ACPI: Add new IORT functions to support MSI domain handling
...
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Rafael J. Wysocki
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0137a337d7 |
Merge branches 'acpi-wdat' and 'acpi-ec'
* acpi-wdat: watchdog: wdat_wdt: Fix warning for using 0 as NULL watchdog: wdat_wdt: fix return value check in wdat_wdt_probe() platform/x86: intel_pmc_ipc: Do not create iTCO watchdog when WDAT table exists i2c: i801: Do not create iTCO watchdog when WDAT table exists mfd: lpc_ich: Do not create iTCO watchdog when WDAT table exists ACPI / watchdog: Add support for WDAT hardware watchdog * acpi-ec: ACPI / EC: Fix issues related to boot_ec ACPI / EC: Fix a gap that ECDT EC cannot handle EC events ACPI / EC: Fix a memory leakage issue in acpi_ec_add() ACPI / EC: Cleanup first_ec/boot_ec code ACPI / EC: Enable event freeze mode to improve event handling for suspend process ACPI / EC: Add PM operations to improve event handling for suspend process ACPI / EC: Add PM operations to improve event handling for resume process ACPI / EC: Fix an issue that SCI_EVT cannot be detected after event is enabled ACPI / EC: Add EC_FLAGS_QUERY_ENABLED to reveal a hidden logic ACPI / EC: Add PM operations for suspend/resume noirq stage |
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Aleksey Makarov
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ad1696f6f0 |
ACPI: parse SPCR and enable matching console
'ARM Server Base Boot Requiremets' [1] mentions SPCR (Serial Port Console Redirection Table) [2] as a mandatory ACPI table that specifies the configuration of serial console. Defer initialization of DT earlycon until ACPI/DT decision is made. Parse the ACPI SPCR table, setup earlycon if required, enable specified console. Thanks to Peter Hurley for explaining how this should work. [1] http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.den0044a/index.html [2] https://msdn.microsoft.com/en-us/library/windows/hardware/dn639132(v=vs.85).aspx Signed-off-by: Aleksey Makarov <aleksey.makarov@linaro.org> Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Reviewed-by: Peter Hurley <peter@hurleysoftware.com> Tested-by: Kefeng Wang <wangkefeng.wang@huawei.com> Tested-by: Christopher Covington <cov@codeaurora.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
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Mika Westerberg
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058dfc7670 |
ACPI / watchdog: Add support for WDAT hardware watchdog
Starting from Intel Skylake the iTCO watchdog timer registers were moved to reside in the same register space with SMBus host controller. Not all needed registers are available though and we need to unhide P2SB (Primary to Sideband) device briefly to be able to read status of required NO_REBOOT bit. The i2c-i801.c SMBus driver used to handle this and creation of the iTCO watchdog platform device. Windows, on the other hand, does not use the iTCO watchdog hardware directly even if it is available. Instead it relies on ACPI Watchdog Action Table (WDAT) table to describe the watchdog hardware to the OS. This table contains necessary information about the the hardware and also set of actions which are executed by a driver as needed. This patch implements a new watchdog driver that takes advantage of the ACPI WDAT table. We split the functionality into two parts: first part enumerates the WDAT table and if found, populates resources and creates platform device for the actual driver. The second part is the driver itself. The reason for the split is that this way we can make the driver itself to be a module and loaded automatically if the WDAT table is found. Otherwise the module is not loaded. Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> |
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Tomasz Nowicki
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88ef16d888 |
ACPI: I/O Remapping Table (IORT) initial support
IORT shows representation of IO topology for ARM based systems. It describes how various components are connected together on parent-child basis e.g. PCI RC -> SMMU -> ITS. Also see IORT spec. http://infocenter.arm.com/help/topic/com.arm.doc.den0049b/DEN0049B_IO_Remapping_Table.pdf Initial support allows to detect IORT table presence and save its root pointer obtained through acpi_get_table(). The pointer validity depends on acpi_gbl_permanent_mmap because if acpi_gbl_permanent_mmap is not set while using IORT nodes we would dereference unmapped pointers. For the aforementioned reason call acpi_iort_init() from acpi_init() which guarantees acpi_gbl_permanent_mmap to be set at that point. Add generic helpers which are helpful for scanning and retrieving information from IORT table content. List of the most important helpers: - iort_find_dev_node() finds IORT node for a given device - iort_node_map_rid() maps device RID and returns IORT node which provides final translation IORT support is placed under drivers/acpi/arm64/ new directory due to its ARM64 specific nature. The code there is considered only for ARM64. The long term plan is to keep all ARM64 specific tables support in this place e.g. GTDT table. Signed-off-by: Tomasz Nowicki <tn@semihalf.com> Acked-by: Rafael J. Wysocki <rjw@rjwysocki.net> Reviewed-by: Hanjun Guo <hanjun.guo@linaro.org> Reviewed-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> |
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Srinivas Pandruvada
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65e958910a |
ACPI / CPPC: Allow build with ACPI_CPU_FREQ_PSS config
Some newer x86 platforms have support for both _CPC and _PSS object. So kernel config can have both ACPI_CPU_FREQ_PSS and ACPI_CPPC_LIB. So remove restriction for ACPI_CPPC_LIB to build only when ACPI_CPU_FREQ_PSS is not defined. Also for legacy systems with only _PSS, we shouldn't bail out if acpi_cppc_processor_probe() fails, if ACPI_CPU_FREQ_PSS is also defined. Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> |
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Linus Torvalds
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c8d0267efd |
PCI changes for the v4.8 merge window:
Enumeration
Move ecam.h to linux/include/pci-ecam.h (Jayachandran C)
Add parent device field to ECAM struct pci_config_window (Jayachandran C)
Add generic MCFG table handling (Tomasz Nowicki)
Refactor pci_bus_assign_domain_nr() for CONFIG_PCI_DOMAINS_GENERIC (Tomasz Nowicki)
Factor DT-specific pci_bus_find_domain_nr() code out (Tomasz Nowicki)
Resource management
Add devm_request_pci_bus_resources() (Bjorn Helgaas)
Unify pci_resource_to_user() declarations (Bjorn Helgaas)
Implement pci_resource_to_user() with pcibios_resource_to_bus() (microblaze, powerpc, sparc) (Bjorn Helgaas)
Request host bridge window resources (designware, iproc, rcar, xgene, xilinx, xilinx-nwl) (Bjorn Helgaas)
Make PCI I/O space optional on ARM32 (Bjorn Helgaas)
Ignore write combining when mapping I/O port space (Bjorn Helgaas)
Claim bus resources on MIPS PCI_PROBE_ONLY set-ups (Bjorn Helgaas)
Remove unicore32 pci=firmware command line parameter handling (Bjorn Helgaas)
Support I/O resources when parsing host bridge resources (Jayachandran C)
Add helpers to request/release memory and I/O regions (Johannes Thumshirn)
Use pci_(request|release)_mem_regions (NVMe, lpfc, GenWQE, ethernet/intel, alx) (Johannes Thumshirn)
Extend pci=resource_alignment to specify device/vendor IDs (Koehrer Mathias (ETAS/ESW5))
Add generic pci_bus_claim_resources() (Lorenzo Pieralisi)
Claim bus resources on ARM32 PCI_PROBE_ONLY set-ups (Lorenzo Pieralisi)
Remove ARM32 and ARM64 arch-specific pcibios_enable_device() (Lorenzo Pieralisi)
Add pci_unmap_iospace() to unmap I/O resources (Sinan Kaya)
Remove powerpc __pci_mmap_set_pgprot() (Yinghai Lu)
PCI device hotplug
Allow additional bus numbers for hotplug bridges (Keith Busch)
Ignore interrupts during D3cold (Lukas Wunner)
Power management
Enforce type casting for pci_power_t (Andy Shevchenko)
Don't clear d3cold_allowed for PCIe ports (Mika Westerberg)
Put PCIe ports into D3 during suspend (Mika Westerberg)
Power on bridges before scanning new devices (Mika Westerberg)
Runtime resume bridge before rescan (Mika Westerberg)
Add runtime PM support for PCIe ports (Mika Westerberg)
Remove redundant check of pcie_set_clkpm (Shawn Lin)
Virtualization
Add function 1 DMA alias quirk for Marvell 88SE9182 (Aaron Sierra)
Add DMA alias quirk for Adaptec 3805 (Alex Williamson)
Mark Atheros AR9485 and QCA9882 to avoid bus reset (Chris Blake)
Add ACS quirk for Solarflare SFC9220 (Edward Cree)
MSI
Fix PCI_MSI dependencies (Arnd Bergmann)
Add pci_msix_desc_addr() helper (Christoph Hellwig)
Switch msix_program_entries() to use pci_msix_desc_addr() (Christoph Hellwig)
Make the "entries" argument to pci_enable_msix() optional (Christoph Hellwig)
Provide sensible IRQ vector alloc/free routines (Christoph Hellwig)
Spread interrupt vectors in pci_alloc_irq_vectors() (Christoph Hellwig)
Error Handling
Bind DPC to Root Ports as well as Downstream Ports (Keith Busch)
Remove DPC tristate module option (Keith Busch)
Convert Downstream Port Containment driver to use devm_* functions (Mika Westerberg)
Generic host bridge driver
Select IRQ_DOMAIN (Arnd Bergmann)
Claim bus resources on PCI_PROBE_ONLY set-ups (Lorenzo Pieralisi)
ACPI host bridge driver
Add ARM64 acpi_pci_bus_find_domain_nr() (Tomasz Nowicki)
Add ARM64 ACPI support for legacy IRQs parsing and consolidation with DT code (Tomasz Nowicki)
Implement ARM64 AML accessors for PCI_Config region (Tomasz Nowicki)
Support ARM64 ACPI-based PCI host controller (Tomasz Nowicki)
Altera host bridge driver
Check link status before retrain link (Ley Foon Tan)
Poll for link up status after retraining the link (Ley Foon Tan)
Axis ARTPEC-6 host bridge driver
Add PCI_MSI_IRQ_DOMAIN dependency (Arnd Bergmann)
Add DT binding for Axis ARTPEC-6 PCIe controller (Niklas Cassel)
Add Axis ARTPEC-6 PCIe controller driver (Niklas Cassel)
Intel VMD host bridge driver
Use lock save/restore in interrupt enable path (Jon Derrick)
Select device dma ops to override (Keith Busch)
Initialize list item in IRQ disable (Keith Busch)
Use x86_vector_domain as parent domain (Keith Busch)
Separate MSI and MSI-X vector sharing (Keith Busch)
Marvell Aardvark host bridge driver
Add DT binding for the Aardvark PCIe controller (Thomas Petazzoni)
Add Aardvark PCI host controller driver (Thomas Petazzoni)
Add Aardvark PCIe support for Armada 3700 (Thomas Petazzoni)
Microsoft Hyper-V host bridge driver
Fix interrupt cleanup path (Cathy Avery)
Don't leak buffer in hv_pci_onchannelcallback() (Vitaly Kuznetsov)
Handle all pending messages in hv_pci_onchannelcallback() (Vitaly Kuznetsov)
NVIDIA Tegra host bridge driver
Program PADS_REFCLK_CFG* always, not just on legacy SoCs (Stephen Warren)
Program PADS_REFCLK_CFG* registers with per-SoC values (Stephen Warren)
Use lower-case hex consistently for register definitions (Thierry Reding)
Use generic pci_remap_iospace() rather than ARM32-specific one (Thierry Reding)
Stop setting pcibios_min_mem (Thierry Reding)
Renesas R-Car host bridge driver
Drop gen2 dummy I/O port region (Bjorn Helgaas)
TI DRA7xx host bridge driver
Fix return value in case of error (Christophe JAILLET)
Xilinx AXI host bridge driver
Fix return value in case of error (Christophe JAILLET)
Miscellaneous
Make bus_attr_resource_alignment static (Ben Dooks)
Include <asm/dma.h> for isa_dma_bridge_buggy (Ben Dooks)
MAINTAINERS: Add file patterns for PCI device tree bindings (Geert Uytterhoeven)
Make host bridge drivers explicitly non-modular (Paul Gortmaker)
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Merge tag 'pci-v4.8-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci
Pull PCI updates from Bjorn Helgaas:
"Highlights:
- ARM64 support for ACPI host bridges
- new drivers for Axis ARTPEC-6 and Marvell Aardvark
- new pci_alloc_irq_vectors() interface for MSI-X, MSI, legacy INTx
- pci_resource_to_user() cleanup (more to come)
Detailed summary:
Enumeration:
- Move ecam.h to linux/include/pci-ecam.h (Jayachandran C)
- Add parent device field to ECAM struct pci_config_window (Jayachandran C)
- Add generic MCFG table handling (Tomasz Nowicki)
- Refactor pci_bus_assign_domain_nr() for CONFIG_PCI_DOMAINS_GENERIC (Tomasz Nowicki)
- Factor DT-specific pci_bus_find_domain_nr() code out (Tomasz Nowicki)
Resource management:
- Add devm_request_pci_bus_resources() (Bjorn Helgaas)
- Unify pci_resource_to_user() declarations (Bjorn Helgaas)
- Implement pci_resource_to_user() with pcibios_resource_to_bus() (microblaze, powerpc, sparc) (Bjorn Helgaas)
- Request host bridge window resources (designware, iproc, rcar, xgene, xilinx, xilinx-nwl) (Bjorn Helgaas)
- Make PCI I/O space optional on ARM32 (Bjorn Helgaas)
- Ignore write combining when mapping I/O port space (Bjorn Helgaas)
- Claim bus resources on MIPS PCI_PROBE_ONLY set-ups (Bjorn Helgaas)
- Remove unicore32 pci=firmware command line parameter handling (Bjorn Helgaas)
- Support I/O resources when parsing host bridge resources (Jayachandran C)
- Add helpers to request/release memory and I/O regions (Johannes Thumshirn)
- Use pci_(request|release)_mem_regions (NVMe, lpfc, GenWQE, ethernet/intel, alx) (Johannes Thumshirn)
- Extend pci=resource_alignment to specify device/vendor IDs (Koehrer Mathias (ETAS/ESW5))
- Add generic pci_bus_claim_resources() (Lorenzo Pieralisi)
- Claim bus resources on ARM32 PCI_PROBE_ONLY set-ups (Lorenzo Pieralisi)
- Remove ARM32 and ARM64 arch-specific pcibios_enable_device() (Lorenzo Pieralisi)
- Add pci_unmap_iospace() to unmap I/O resources (Sinan Kaya)
- Remove powerpc __pci_mmap_set_pgprot() (Yinghai Lu)
PCI device hotplug:
- Allow additional bus numbers for hotplug bridges (Keith Busch)
- Ignore interrupts during D3cold (Lukas Wunner)
Power management:
- Enforce type casting for pci_power_t (Andy Shevchenko)
- Don't clear d3cold_allowed for PCIe ports (Mika Westerberg)
- Put PCIe ports into D3 during suspend (Mika Westerberg)
- Power on bridges before scanning new devices (Mika Westerberg)
- Runtime resume bridge before rescan (Mika Westerberg)
- Add runtime PM support for PCIe ports (Mika Westerberg)
- Remove redundant check of pcie_set_clkpm (Shawn Lin)
Virtualization:
- Add function 1 DMA alias quirk for Marvell 88SE9182 (Aaron Sierra)
- Add DMA alias quirk for Adaptec 3805 (Alex Williamson)
- Mark Atheros AR9485 and QCA9882 to avoid bus reset (Chris Blake)
- Add ACS quirk for Solarflare SFC9220 (Edward Cree)
MSI:
- Fix PCI_MSI dependencies (Arnd Bergmann)
- Add pci_msix_desc_addr() helper (Christoph Hellwig)
- Switch msix_program_entries() to use pci_msix_desc_addr() (Christoph Hellwig)
- Make the "entries" argument to pci_enable_msix() optional (Christoph Hellwig)
- Provide sensible IRQ vector alloc/free routines (Christoph Hellwig)
- Spread interrupt vectors in pci_alloc_irq_vectors() (Christoph Hellwig)
Error Handling:
- Bind DPC to Root Ports as well as Downstream Ports (Keith Busch)
- Remove DPC tristate module option (Keith Busch)
- Convert Downstream Port Containment driver to use devm_* functions (Mika Westerberg)
Generic host bridge driver:
- Select IRQ_DOMAIN (Arnd Bergmann)
- Claim bus resources on PCI_PROBE_ONLY set-ups (Lorenzo Pieralisi)
ACPI host bridge driver:
- Add ARM64 acpi_pci_bus_find_domain_nr() (Tomasz Nowicki)
- Add ARM64 ACPI support for legacy IRQs parsing and consolidation with DT code (Tomasz Nowicki)
- Implement ARM64 AML accessors for PCI_Config region (Tomasz Nowicki)
- Support ARM64 ACPI-based PCI host controller (Tomasz Nowicki)
Altera host bridge driver:
- Check link status before retrain link (Ley Foon Tan)
- Poll for link up status after retraining the link (Ley Foon Tan)
Axis ARTPEC-6 host bridge driver:
- Add PCI_MSI_IRQ_DOMAIN dependency (Arnd Bergmann)
- Add DT binding for Axis ARTPEC-6 PCIe controller (Niklas Cassel)
- Add Axis ARTPEC-6 PCIe controller driver (Niklas Cassel)
Intel VMD host bridge driver:
- Use lock save/restore in interrupt enable path (Jon Derrick)
- Select device dma ops to override (Keith Busch)
- Initialize list item in IRQ disable (Keith Busch)
- Use x86_vector_domain as parent domain (Keith Busch)
- Separate MSI and MSI-X vector sharing (Keith Busch)
Marvell Aardvark host bridge driver:
- Add DT binding for the Aardvark PCIe controller (Thomas Petazzoni)
- Add Aardvark PCI host controller driver (Thomas Petazzoni)
- Add Aardvark PCIe support for Armada 3700 (Thomas Petazzoni)
Microsoft Hyper-V host bridge driver:
- Fix interrupt cleanup path (Cathy Avery)
- Don't leak buffer in hv_pci_onchannelcallback() (Vitaly Kuznetsov)
- Handle all pending messages in hv_pci_onchannelcallback() (Vitaly Kuznetsov)
NVIDIA Tegra host bridge driver:
- Program PADS_REFCLK_CFG* always, not just on legacy SoCs (Stephen Warren)
- Program PADS_REFCLK_CFG* registers with per-SoC values (Stephen Warren)
- Use lower-case hex consistently for register definitions (Thierry Reding)
- Use generic pci_remap_iospace() rather than ARM32-specific one (Thierry Reding)
- Stop setting pcibios_min_mem (Thierry Reding)
Renesas R-Car host bridge driver:
- Drop gen2 dummy I/O port region (Bjorn Helgaas)
TI DRA7xx host bridge driver:
- Fix return value in case of error (Christophe JAILLET)
Xilinx AXI host bridge driver:
- Fix return value in case of error (Christophe JAILLET)
Miscellaneous:
- Make bus_attr_resource_alignment static (Ben Dooks)
- Include <asm/dma.h> for isa_dma_bridge_buggy (Ben Dooks)
- MAINTAINERS: Add file patterns for PCI device tree bindings (Geert Uytterhoeven)
- Make host bridge drivers explicitly non-modular (Paul Gortmaker)"
* tag 'pci-v4.8-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (125 commits)
PCI: xgene: Make explicitly non-modular
PCI: thunder-pem: Make explicitly non-modular
PCI: thunder-ecam: Make explicitly non-modular
PCI: tegra: Make explicitly non-modular
PCI: rcar-gen2: Make explicitly non-modular
PCI: rcar: Make explicitly non-modular
PCI: mvebu: Make explicitly non-modular
PCI: layerscape: Make explicitly non-modular
PCI: keystone: Make explicitly non-modular
PCI: hisi: Make explicitly non-modular
PCI: generic: Make explicitly non-modular
PCI: designware-plat: Make it explicitly non-modular
PCI: artpec6: Make explicitly non-modular
PCI: armada8k: Make explicitly non-modular
PCI: artpec: Add PCI_MSI_IRQ_DOMAIN dependency
PCI: Add ACS quirk for Solarflare SFC9220
arm64: dts: marvell: Add Aardvark PCIe support for Armada 3700
PCI: aardvark: Add Aardvark PCI host controller driver
dt-bindings: add DT binding for the Aardvark PCIe controller
PCI: tegra: Program PADS_REFCLK_CFG* registers with per-SoC values
...
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Linus Torvalds
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f0c98ebc57 |
libnvdimm for 4.8
1/ Replace pcommit with ADR / directed-flushing:
The pcommit instruction, which has not shipped on any product, is
deprecated. Instead, the requirement is that platforms implement either
ADR, or provide one or more flush addresses per nvdimm. ADR
(Asynchronous DRAM Refresh) flushes data in posted write buffers to the
memory controller on a power-fail event. Flush addresses are defined in
ACPI 6.x as an NVDIMM Firmware Interface Table (NFIT) sub-structure:
"Flush Hint Address Structure". A flush hint is an mmio address that
when written and fenced assures that all previous posted writes
targeting a given dimm have been flushed to media.
2/ On-demand ARS (address range scrub):
Linux uses the results of the ACPI ARS commands to track bad blocks
in pmem devices. When latent errors are detected we re-scrub the media
to refresh the bad block list, userspace can also request a re-scrub at
any time.
3/ Support for the Microsoft DSM (device specific method) command format.
4/ Support for EDK2/OVMF virtual disk device memory ranges.
5/ Various fixes and cleanups across the subsystem.
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Merge tag 'libnvdimm-for-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm
Pull libnvdimm updates from Dan Williams:
- Replace pcommit with ADR / directed-flushing.
The pcommit instruction, which has not shipped on any product, is
deprecated. Instead, the requirement is that platforms implement
either ADR, or provide one or more flush addresses per nvdimm.
ADR (Asynchronous DRAM Refresh) flushes data in posted write buffers
to the memory controller on a power-fail event.
Flush addresses are defined in ACPI 6.x as an NVDIMM Firmware
Interface Table (NFIT) sub-structure: "Flush Hint Address Structure".
A flush hint is an mmio address that when written and fenced assures
that all previous posted writes targeting a given dimm have been
flushed to media.
- On-demand ARS (address range scrub).
Linux uses the results of the ACPI ARS commands to track bad blocks
in pmem devices. When latent errors are detected we re-scrub the
media to refresh the bad block list, userspace can also request a
re-scrub at any time.
- Support for the Microsoft DSM (device specific method) command
format.
- Support for EDK2/OVMF virtual disk device memory ranges.
- Various fixes and cleanups across the subsystem.
* tag 'libnvdimm-for-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm: (41 commits)
libnvdimm-btt: Delete an unnecessary check before the function call "__nd_device_register"
nfit: do an ARS scrub on hitting a latent media error
nfit: move to nfit/ sub-directory
nfit, libnvdimm: allow an ARS scrub to be triggered on demand
libnvdimm: register nvdimm_bus devices with an nd_bus driver
pmem: clarify a debug print in pmem_clear_poison
x86/insn: remove pcommit
Revert "KVM: x86: add pcommit support"
nfit, tools/testing/nvdimm/: unify shutdown paths
libnvdimm: move ->module to struct nvdimm_bus_descriptor
nfit: cleanup acpi_nfit_init calling convention
nfit: fix _FIT evaluation memory leak + use after free
tools/testing/nvdimm: add manufacturing_{date|location} dimm properties
tools/testing/nvdimm: add virtual ramdisk range
acpi, nfit: treat virtual ramdisk SPA as pmem region
pmem: kill __pmem address space
pmem: kill wmb_pmem()
libnvdimm, pmem: use nvdimm_flush() for namespace I/O writes
fs/dax: remove wmb_pmem()
libnvdimm, pmem: flush posted-write queues on shutdown
...
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Rafael J. Wysocki
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54d0b14ad7 |
Merge branches 'acpi-drivers', 'acpi-misc' and 'acpi-tools'
* acpi-drivers: ACPI / DPTF: move int340x_thermal.c to the DPTF folder ACPI / DPTF: Add DPTF power participant driver * acpi-misc: ACPI / lpat: make it explicitly non-modular ACPI / dock: make dock explicitly non-modular * acpi-tools: tools/acpi: use CROSS_COMPILE to define prefix |
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Rafael J. Wysocki
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273b5a4836 |
Merge branch 'acpi-pmic'
* acpi-pmic: ACPI / PMIC: remove modular references from non-modular code ACPI / PMIC: intel: initialize result to 0 ACPI / PMIC: intel: add REGS operation region support ACPI / PMIC: Add opregion driver for Intel BXT WhiskeyCove PMIC ACPI / PMIC: modify the pen function signature to take bit field Conflicts: drivers/acpi/Makefile |
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Rafael J. Wysocki
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6149dffcb5 |
Merge branches 'acpi-processor', 'acpi-cppc', 'acpi-apei' and 'acpi-sleep'
* acpi-processor:
ACPI: enable ACPI_PROCESSOR_IDLE on ARM64
arm64: add support for ACPI Low Power Idle(LPI)
drivers: firmware: psci: initialise idle states using ACPI LPI
cpuidle: introduce CPU_PM_CPU_IDLE_ENTER macro for ARM{32, 64}
arm64: cpuidle: drop __init section marker to arm_cpuidle_init
ACPI / processor_idle: Add support for Low Power Idle(LPI) states
ACPI / processor_idle: introduce ACPI_PROCESSOR_CSTATE
* acpi-cppc:
mailbox: pcc: Add PCC request and free channel declarations
ACPI / CPPC: Prevent cpc_desc_ptr points to the invalid data
ACPI: CPPC: Return error if _CPC is invalid on a CPU
* acpi-apei:
ACPI / APEI: Add Boot Error Record Table (BERT) support
ACPI / einj: Make error paths more talkative
ACPI / einj: Convert EINJ_PFX to proper pr_fmt
* acpi-sleep:
ACPI: Execute _PTS before system reboot
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Rafael J. Wysocki
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d5f017b796 |
Merge branch 'acpi-tables'
* acpi-tables: ACPI: Rename configfs.c to acpi_configfs.c to prevent link error ACPI: add support for loading SSDTs via configfs ACPI: add support for configfs efi / ACPI: load SSTDs from EFI variables spi / ACPI: add support for ACPI reconfigure notifications i2c / ACPI: add support for ACPI reconfigure notifications ACPI: add support for ACPI reconfiguration notifiers ACPI / scan: fix enumeration (visited) flags for bus rescans ACPI / documentation: add SSDT overlays documentation ACPI: ARM64: support for ACPI_TABLE_UPGRADE ACPI / tables: introduce ARCH_HAS_ACPI_TABLE_UPGRADE ACPI / tables: move arch-specific symbol to asm/acpi.h ACPI / tables: table upgrade: refactor function definitions ACPI / tables: table upgrade: use cacheable map for tables Conflicts: arch/arm64/include/asm/acpi.h |
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Dan Williams
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bdf97013ce |
nfit: move to nfit/ sub-directory
With the arrival of x86-machine-check support the nfit driver will add a (conditionally-compiled) source file. Prepare for this by moving all nfit source to drivers/acpi/nfit/. This is pure code movement, no functional changes. Signed-off-by: Dan Williams <dan.j.williams@intel.com> |
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Sudeep Holla
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8fc85c6ad8 |
ACPI: enable ACPI_PROCESSOR_IDLE on ARM64
Now that ACPI processor idle driver supports LPI(Low Power Idle), lets enable ACPI_PROCESSOR_IDLE for ARM64 too. This patch just removes the IA64 and X86 dependency on ACPI_PROCESSOR_IDLE Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> |
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Sudeep Holla
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35ae713355 |
ACPI / processor_idle: introduce ACPI_PROCESSOR_CSTATE
ACPI 6.0 adds a new method to specify the CPU idle states(C-states) called Low Power Idle(LPI) states. Since new architectures like ARM64 use only LPIs, introduce ACPI_PROCESSOR_CSTATE to encapsulate all the code supporting the old style C-states(_CST). This patch will help to extend the processor_idle module to support LPI. Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> |
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Srinivas Pandruvada
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6256ebd5da |
ACPI / DPTF: Add DPTF power participant driver
This driver adds support for Dynamic Platform and Thermal Framework
(DPTF) Platform Power Participant device (INT3407) support.
This participant is responsible for exposing platform telemetry such as:
max_platform_power
platform_power_source
adapter_rating
battery_steady_power
charger_type
These attributes are presented via sysfs interface under the INT3407
platform device:
$ls /sys/bus/platform/devices/INT3407\:00/dptf_power/
adapter_rating_mw
battery_steady_power_mw
charger_type
max_platform_power_mw
platform_power_source
`
ACPI methods description used in this driver:
PMAX: Maximum platform power that can be supported by the battery in
mW.
PSRC: System charge source,
0x00 = DC
0x01 = AC
0x02 = USB
0x03 = Wireless Charger
ARTG: Adapter rating in mW (Maximum Adapter power) Must be 0 if no
AC adapter is plugged in.
CTYP: Charger Type,
Traditional : 0x01
Hybrid: 0x02
NVDC: 0x03
PBSS: Returns max sustained power for battery in milliWatts.
The INT3407 also contains _BTS and _BIX objects, which are compliant to
ACPI 5.0, specification. Those objects are already used by ACPI battery
(PNP0C0A) driver and information about them is exported via Linux power
supply class registration.
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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Octavian Purdila
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0bf54fcd95 |
ACPI: add support for configfs
Register the ACPI subsystem with configfs. Signed-off-by: Octavian Purdila <octavian.purdila@intel.com> Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> |
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Bin Gao
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9b928c78bb |
ACPI / PMIC: Add opregion driver for Intel BXT WhiskeyCove PMIC
This patch adds operation region driver for Intel BXT WhiskeyCove PMIC. The register mapping is done as per the BXT WC data sheet. Signed-off-by: Ajay Thomas <ajay.thomas.david.rajamanickam@intel.com> Signed-off-by: Bin Gao <bin.gao@intel.com> Reviewed-by: Aaron Lu <aaron.lu@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> |
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Hanjun Guo
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4bac6fa73d |
ACPI / NUMA: Enable ACPI based NUMA on ARM64
Add function needed for cpu to node mapping, and enable ACPI based NUMA for ARM64 in Kconfig Signed-off-by: Hanjun Guo <hanjun.guo@linaro.org> Signed-off-by: Robert Richter <rrichter@cavium.com> [david.daney@cavium.com added ACPI_NUMA default to y for ARM64] Signed-off-by: David Daney <david.daney@cavium.com> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> |
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Aleksey Makarov
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91dda51a11 |
ACPI / tables: introduce ARCH_HAS_ACPI_TABLE_UPGRADE
We want to use the table upgrade feature in ARM64. Introduce a new configuration option that allows that. Signed-off-by: Aleksey Makarov <aleksey.makarov@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> |
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Tomasz Nowicki
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935c760ec8 |
PCI/ACPI: Add generic MCFG table handling
On ACPI systems that support memory-mapped config space access, i.e., ECAM, the PCI Firmware Specification says the OS can learn where the ECAM space is from either: - the static MCFG table (for non-hotpluggable bridges), or - the _CBA method (for hotpluggable bridges) The current MCFG table handling code cannot be easily generalized owing to x86-specific quirks, which makes it hard to reuse on other architectures. Implement generic MCFG handling from scratch, including: - Simple MCFG table parsing (via pci_mmcfg_late_init() as in current x86) - MCFG region lookup for a (domain, bus_start, bus_end) tuple [bhelgaas: changelog] Signed-off-by: Tomasz Nowicki <tn@semihalf.com> Signed-off-by: Jayachandran C <jchandra@broadcom.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> |
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Rafael J. Wysocki
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fc72395780 |
Merge branches 'acpi-pci', 'acpi-misc' and 'acpi-tools'
* acpi-pci: ACPI,PCI,IRQ: remove SCI penalize function ACPI,PCI,IRQ: remove redundant code in acpi_irq_penalty_init() ACPI,PCI,IRQ: reduce static IRQ array size to 16 ACPI,PCI,IRQ: reduce resource requirements * acpi-misc: ACPI / sysfs: fix error code in get_status() ACPI / device_sysfs: Clean up checkpatch errors ACPI / device_sysfs: Change _SUN and _STA show functions error return to EIO ACPI / device_sysfs: Add sysfs support for _HRV hardware revision arm64: defconfig: Enable ACPI ACPI / ARM64: Remove EXPERT dependency for ACPI on ARM64 ACPI / ARM64: Don't enable ACPI by default on ARM64 acer-wmi: Use acpi_dev_found() eeepc-wmi: Use acpi_dev_found() ACPI / utils: Rename acpi_dev_present() * acpi-tools: tools/power/acpi: close file only if it is open |
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Mark Brown
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46bcc6b1f3 |
ACPI / ARM64: Remove EXPERT dependency for ACPI on ARM64
When ACPI was originally merged for arm64 it had only been tested on emulators and not on real physical platforms and no platforms were relying on it. This meant that there were concerns that there might be serious issues attempting to use it on practical systems so it had a dependency on EXPERT added to warn people that it was in an early stage of development with very little practical testing. Since then things have moved on a bit. We have seen people testing on real hardware and now have people starting to produce some platforms (the most prominent being the 96boards Cello) which only have ACPI support and which build and run to some useful extent with mainline. This is not to say that ACPI support or support for these systems is completely done, there are still areas being worked on such as PCI, but at this point it seems that we can be reasonably sure that ACPI will be viable for use on ARM64 and that the already merged support works for the cases it handles. For the AMD Seattle based platforms support outside of PCI has been fairly complete in mainline a few releases now. This is also not to say that we don't have vendors working with ACPI who are trying do things that we would not consider optimal but it does not appear that the EXPERT dependency is having a substantial impact on these vendors. Given all this it seems that at this point the EXPERT dependency mainly creates inconvenience for users with systems that are doing the right thing and gets in the way of including the ACPI code in the testing that people are doing on mainline. Removing it should help our ongoing testing cover those platforms with only ACPI support and help ensure that when ACPI code is merged any problems it causes for other users are more easily discovered. Signed-off-by: Mark Brown <broonie@kernel.org> Acked-by: Graeme Gregory <graeme.gregory@linaro.org> Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Reviewed-by: Al Stone <ahs3@redhat.com> Acked-by: Hanjun Guo <hanjun.guo@linaro.org> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Roy Franz <roy.franz@hpe.com> Acked-by: Olof Johansson <olof@lixom.net> Acked-by: Timur Tabi <timur@codeaurora.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> |
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Mark Brown
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6df795ff13 |
ACPI / ARM64: Don't enable ACPI by default on ARM64
If ACPI is selectable it is enabled by default. This is a good choice for architectures where the overwhelming majority of systems use ACPI like x86 and IA-64 but is less clear for architectures where it's less common like ARM64. Change the default selection so that it's only done explicitly on those architectures where ACPI is universally used. Signed-off-by: Mark Brown <broonie@kernel.org> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Hanjun Guo <hanjun.guo@linaro.org> Acked-by: Olof Johansson <olof@lixom.net> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> |
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Lv Zheng
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5d8813271f |
ACPI / tables: Convert initrd table override to table upgrade mechanism
This patch converts the initrd table override mechanism to the table
upgrade mechanism by restricting its usage to the tables released with
compatibility and more recent revision.
This use case has been encouraged by the ACPI specification:
1. OEMID:
An OEM-supplied string that identifies the OEM.
2. OEM Table ID:
An OEM-supplied string that the OEM uses to identify the particular data
table. This field is particularly useful when defining a definition
block to distinguish definition block functions. OEM assigns each
dissimilar table a new OEM Table Id.
3. OEM Revision:
An OEM-supplied revision number. Larger numbers are assumed to be newer
revisions.
For OEMs, good practices will ensure consistency when assigning OEMID and
OEM Table ID fields in any table. The intent of these fields is to allow
for a binary control system that support services can use. Because many
support function can be automated, it is useful when a tool can
programatically determine which table release is a compatible and more
recent revision of a prior table on the same OEMID and OEM Table ID.
The facility can now be used by the vendors to upgrade wrong tables for bug
fixing purpose, thus lockdep disabling taint is not suitable for it and it
should be a default 'y' option to implement the spec encouraged use case.
Note that, by implementing table upgrade inside of ACPICA itself, it is
possible to remove acpi_table_initrd_override() and tables can be upgraded
by acpi_install_table() automatically. Though current ACPICA impelentation
hasn't implemented this, this patched changes the table flag setting timing
to allow this to be implemented in ACPICA without changing the code here.
Documentation of initrd override mechanism is upgraded accordingly.
Original-by: Octavian Purdila <octavian.purdila@intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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Lv Zheng
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836d083018 |
ACPI / debugger: Add module support for ACPI debugger
This patch converts AML debugger into a loadable module. Note that, it implements driver unloading at the level dependent on the module reference count. Which means if ACPI debugger is being used by a userspace program, "rmmod acpi_dbg" should result in failure. Signed-off-by: Lv Zheng <lv.zheng@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> |
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Lv Zheng
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8cfb0cdf07 |
ACPI / debugger: Add IO interface to access debugger functionalities
This patch adds /sys/kernel/debug/acpi/acpidbg, which can be used by userspace programs to access ACPICA debugger functionalities. Known issue: 1. IO flush support acpi_os_notify_command_complete() and acpi_os_wait_command_ready() can be used by acpi_dbg module to implement .flush() filesystem operation. While this patch doesn't go that far. It then becomes userspace tool's duty now to flush old commands before executing new batch mode commands. Signed-off-by: Lv Zheng <lv.zheng@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> |
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Rafael J. Wysocki
|
3e5050e60e |
Merge branches 'acpica', 'acpi-video' and 'device-properties'
* acpica: ACPI: Better describe ACPI_DEBUGGER * acpi-video: MAINTAINERS: ACPI / video: update a file name in drivers/acpi/ * device-properties: ACPI / property: fix compile error for acpi_node_get_property_reference() when CONFIG_ACPI=n |
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Peter Zijlstra
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1170419496 |
ACPI: Better describe ACPI_DEBUGGER
Hi, For a brief moment I was tricked into thinking that: In-kernel debugger (EXPERIMENTAL) (ACPI_DEBUGGER) [N/y/?] (NEW) might be something useful. Better describe the feature to reduce such confusion. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> |
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Rafael J. Wysocki
|
62839e2d01 |
Merge branch 'acpi-processor'
* acpi-processor: ACPI / CPPC: Fix potential memory leak ACPI / CPPC: signedness bug in register_pcc_channel() ACPI: Allow selection of the ACPI processor driver for ARM64 CPPC: Probe for CPPC tables for each ACPI Processor object ACPI: Add weak routines for ACPI CPU Hotplug ACPI / CPPC: Add a CPUFreq driver for use with CPPC ACPI: Introduce CPU performance controls using CPPC |
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Lv Zheng
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4d946f7970 |
ACPI: Enable build of AML interpreter debugger
This patch enables ACPICA debugger files using a configurable
CONFIG_ACPI_DEBUGGER configuration item. Those debugger related code that
was originally masked as ACPI_FUTURE_USAGE now gets unmasked.
Necessary OSL stubs are also added in this patch:
1. acpi_os_readable(): This should be arch specific in Linux, while this
patch doesn't introduce real implementation and a complex mechanism to
allow architecture specific acpi_os_readable() to be implemented to
validate the address. It may be done by future commits.
2. acpi_os_get_line(): This is used to obtain debugger command input. This
patch only introduces a simple KDB concept example in it and the
example should be co-working with the code implemented in
acpi_os_printf(). Since this KDB example won't be compiled unless
ENABLE_DEBUGGER is defined and it seems Linux has already stopped to
use ENABLE_DEBUGGER, thus do not expect it can work properly.
This patch also cleans up all other ACPI_FUTURE_USAGE surroundings
accordingly.
1. Since linkage error can be automatically detected, declaration in the
headers needn't be surrounded by ACPI_FUTURE_USAGE.
So only the following separate exported fuction bodies are masked by
this macro (other exported fucntions may have already been masked at
entire module level via drivers/acpi/acpica/Makefile):
acpi_install_exception_handler()
acpi_subsystem_status()
acpi_get_system_info()
acpi_get_statistics()
acpi_install_initialization_handler()
2. Since strip can automatically zap the no-user functions, functions that
are not marked with ACPI_EXPORT_SYMBOL() needn't get surrounded by
ACPI_FUTURE_USAGE.
So the following function which is not used by Linux kernel now won't
get surrounded by this macro:
acpi_ps_get_name()
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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Ashwin Chaugule
|
ad806ea66c |
ACPI: Allow selection of the ACPI processor driver for ARM64
Now that the ACPI processor driver has been decoupled from the C states and P states functionality, make it selectable on ARM64 so that it can be used by others e.g. CPPC. The C states and P states code is selected only on X86 or IA64 until the relevant support is added on ARM64. Signed-off-by: Ashwin Chaugule <ashwin.chaugule@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> |
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Ashwin Chaugule
|
337aadff8e |
ACPI: Introduce CPU performance controls using CPPC
CPPC stands for Collaborative Processor Performance Controls and is defined in the ACPI v5.0+ spec. It describes CPU performance controls on an abstract and continuous scale allowing the platform (e.g. remote power processor) to flexibly optimize CPU performance with its knowledge of power budgets and other architecture specific knowledge. This patch adds a shim which exports commonly used functions to get and set CPPC specific controls for each CPU. This enables CPUFreq drivers to gather per CPU performance data and use with exisiting governors or even allows for customized governors which are implemented inside CPUFreq drivers. Signed-off-by: Ashwin Chaugule <ashwin.chaugule@linaro.org> Reviewed-by: Al Stone <al.stone@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> |
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Linus Torvalds
|
12f03ee606 |
libnvdimm for 4.3:
1/ Introduce ZONE_DEVICE and devm_memremap_pages() as a generic
mechanism for adding device-driver-discovered memory regions to the
kernel's direct map. This facility is used by the pmem driver to
enable pfn_to_page() operations on the page frames returned by DAX
('direct_access' in 'struct block_device_operations'). For now, the
'memmap' allocation for these "device" pages comes from "System
RAM". Support for allocating the memmap from device memory will
arrive in a later kernel.
2/ Introduce memremap() to replace usages of ioremap_cache() and
ioremap_wt(). memremap() drops the __iomem annotation for these
mappings to memory that do not have i/o side effects. The
replacement of ioremap_cache() with memremap() is limited to the
pmem driver to ease merging the api change in v4.3. Completion of
the conversion is targeted for v4.4.
3/ Similar to the usage of memcpy_to_pmem() + wmb_pmem() in the pmem
driver, update the VFS DAX implementation and PMEM api to provide
persistence guarantees for kernel operations on a DAX mapping.
4/ Convert the ACPI NFIT 'BLK' driver to map the block apertures as
cacheable to improve performance.
5/ Miscellaneous updates and fixes to libnvdimm including support
for issuing "address range scrub" commands, clarifying the optimal
'sector size' of pmem devices, a clarification of the usage of the
ACPI '_STA' (status) property for DIMM devices, and other minor
fixes.
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Merge tag 'libnvdimm-for-4.3' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm
Pull libnvdimm updates from Dan Williams:
"This update has successfully completed a 0day-kbuild run and has
appeared in a linux-next release. The changes outside of the typical
drivers/nvdimm/ and drivers/acpi/nfit.[ch] paths are related to the
removal of IORESOURCE_CACHEABLE, the introduction of memremap(), and
the introduction of ZONE_DEVICE + devm_memremap_pages().
Summary:
- Introduce ZONE_DEVICE and devm_memremap_pages() as a generic
mechanism for adding device-driver-discovered memory regions to the
kernel's direct map.
This facility is used by the pmem driver to enable pfn_to_page()
operations on the page frames returned by DAX ('direct_access' in
'struct block_device_operations').
For now, the 'memmap' allocation for these "device" pages comes
from "System RAM". Support for allocating the memmap from device
memory will arrive in a later kernel.
- Introduce memremap() to replace usages of ioremap_cache() and
ioremap_wt(). memremap() drops the __iomem annotation for these
mappings to memory that do not have i/o side effects. The
replacement of ioremap_cache() with memremap() is limited to the
pmem driver to ease merging the api change in v4.3.
Completion of the conversion is targeted for v4.4.
- Similar to the usage of memcpy_to_pmem() + wmb_pmem() in the pmem
driver, update the VFS DAX implementation and PMEM api to provide
persistence guarantees for kernel operations on a DAX mapping.
- Convert the ACPI NFIT 'BLK' driver to map the block apertures as
cacheable to improve performance.
- Miscellaneous updates and fixes to libnvdimm including support for
issuing "address range scrub" commands, clarifying the optimal
'sector size' of pmem devices, a clarification of the usage of the
ACPI '_STA' (status) property for DIMM devices, and other minor
fixes"
* tag 'libnvdimm-for-4.3' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm: (34 commits)
libnvdimm, pmem: direct map legacy pmem by default
libnvdimm, pmem: 'struct page' for pmem
libnvdimm, pfn: 'struct page' provider infrastructure
x86, pmem: clarify that ARCH_HAS_PMEM_API implies PMEM mapped WB
add devm_memremap_pages
mm: ZONE_DEVICE for "device memory"
mm: move __phys_to_pfn and __pfn_to_phys to asm/generic/memory_model.h
dax: drop size parameter to ->direct_access()
nd_blk: change aperture mapping from WC to WB
nvdimm: change to use generic kvfree()
pmem, dax: have direct_access use __pmem annotation
dax: update I/O path to do proper PMEM flushing
pmem: add copy_from_iter_pmem() and clear_pmem()
pmem, x86: clean up conditional pmem includes
pmem: remove layer when calling arch_has_wmb_pmem()
pmem, x86: move x86 PMEM API to new pmem.h header
libnvdimm, e820: make CONFIG_X86_PMEM_LEGACY a tristate option
pmem: switch to devm_ allocations
devres: add devm_memremap
libnvdimm, btt: write and validate parent_uuid
...
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Ross Zwisler
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67a3e8fe90 |
nd_blk: change aperture mapping from WC to WB
This should result in a pretty sizeable performance gain for reads. For rough comparison I did some simple read testing using PMEM to compare reads of write combining (WC) mappings vs write-back (WB). This was done on a random lab machine. PMEM reads from a write combining mapping: # dd of=/dev/null if=/dev/pmem0 bs=4096 count=100000 100000+0 records in 100000+0 records out 409600000 bytes (410 MB) copied, 9.2855 s, 44.1 MB/s PMEM reads from a write-back mapping: # dd of=/dev/null if=/dev/pmem0 bs=4096 count=1000000 1000000+0 records in 1000000+0 records out 4096000000 bytes (4.1 GB) copied, 3.44034 s, 1.2 GB/s To be able to safely support a write-back aperture I needed to add support for the "read flush" _DSM flag, as outlined in the DSM spec: http://pmem.io/documents/NVDIMM_DSM_Interface_Example.pdf This flag tells the ND BLK driver that it needs to flush the cache lines associated with the aperture after the aperture is moved but before any new data is read. This ensures that any stale cache lines from the previous contents of the aperture will be discarded from the processor cache, and the new data will be read properly from the DIMM. We know that the cache lines are clean and will be discarded without any writeback because either a) the previous aperture operation was a read, and we never modified the contents of the aperture, or b) the previous aperture operation was a write and we must have written back the dirtied contents of the aperture to the DIMM before the I/O was completed. In order to add support for the "read flush" flag I needed to add a generic routine to invalidate cache lines, mmio_flush_range(). This is protected by the ARCH_HAS_MMIO_FLUSH Kconfig variable, and is currently only supported on x86. Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com> |