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Author SHA1 Message Date
Linus Torvalds
9b06860d7c libnvdimm for 5.7 
- Add support for region alignment configuration and enforcement to
   fix compatibility across architectures and PowerPC page size
   configurations.
 
 - Introduce 'zero_page_range' as a dax operation. This facilitates
   filesystem-dax operation without a block-device.
 
 - Introduce phys_to_target_node() to facilitate drivers that want to
   know resulting numa node if a given reserved address range was
   onlined.
 
 - Advertise a persistence-domain for of_pmem and papr_scm. The
   persistence domain indicates where cpu-store cycles need to reach in
   the platform-memory subsystem before the platform will consider them
   power-fail protected.
 
 - Promote numa_map_to_online_node() to a cross-kernel generic facility.
 
 - Save x86 numa information to allow for node-id lookups for reserved
   memory ranges, deploy that capability for the e820-pmem driver.
 
 - Pick up some miscellaneous minor fixes, that missed v5.6-final,
   including a some smatch reports in the ioctl path and some unit test
   compilation fixups.
 
 - Fixup some flexible-array declarations.
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Merge tag 'libnvdimm-for-5.7' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm

Pull libnvdimm and dax updates from Dan Williams:
 "There were multiple touches outside of drivers/nvdimm/ this round to
  add cross arch compatibility to the devm_memremap_pages() interface,
  enhance numa information for persistent memory ranges, and add a
  zero_page_range() dax operation.

  This cycle I switched from the patchwork api to Konstantin's b4 script
  for collecting tags (from x86, PowerPC, filesystem, and device-mapper
  folks), and everything looks to have gone ok there. This has all
  appeared in -next with no reported issues.

  Summary:

   - Add support for region alignment configuration and enforcement to
     fix compatibility across architectures and PowerPC page size
     configurations.

   - Introduce 'zero_page_range' as a dax operation. This facilitates
     filesystem-dax operation without a block-device.

   - Introduce phys_to_target_node() to facilitate drivers that want to
     know resulting numa node if a given reserved address range was
     onlined.

   - Advertise a persistence-domain for of_pmem and papr_scm. The
     persistence domain indicates where cpu-store cycles need to reach
     in the platform-memory subsystem before the platform will consider
     them power-fail protected.

   - Promote numa_map_to_online_node() to a cross-kernel generic
     facility.

   - Save x86 numa information to allow for node-id lookups for reserved
     memory ranges, deploy that capability for the e820-pmem driver.

   - Pick up some miscellaneous minor fixes, that missed v5.6-final,
     including a some smatch reports in the ioctl path and some unit
     test compilation fixups.

   - Fixup some flexible-array declarations"

* tag 'libnvdimm-for-5.7' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm: (29 commits)
  dax: Move mandatory ->zero_page_range() check in alloc_dax()
  dax,iomap: Add helper dax_iomap_zero() to zero a range
  dax: Use new dax zero page method for zeroing a page
  dm,dax: Add dax zero_page_range operation
  s390,dcssblk,dax: Add dax zero_page_range operation to dcssblk driver
  dax, pmem: Add a dax operation zero_page_range
  pmem: Add functions for reading/writing page to/from pmem
  libnvdimm: Update persistence domain value for of_pmem and papr_scm device
  tools/test/nvdimm: Fix out of tree build
  libnvdimm/region: Fix build error
  libnvdimm/region: Replace zero-length array with flexible-array member
  libnvdimm/label: Replace zero-length array with flexible-array member
  ACPI: NFIT: Replace zero-length array with flexible-array member
  libnvdimm/region: Introduce an 'align' attribute
  libnvdimm/region: Introduce NDD_LABELING
  libnvdimm/namespace: Enforce memremap_compat_align()
  libnvdimm/pfn: Prevent raw mode fallback if pfn-infoblock valid
  libnvdimm: Out of bounds read in __nd_ioctl()
  acpi/nfit: improve bounds checking for 'func'
  mm/memremap_pages: Introduce memremap_compat_align()
  ...
 2020-04-08 21:03:40 -07:00
Linus Torvalds
ef05db16bb Additional power management updates for 5.7-rc1 
- Fix corner-case suspend-to-idle wakeup issue on systems where
    the ACPI SCI is shared with another wakeup source (Hans de Goede).
 
  - Add document describing system-wide suspend and resume code flows
    to the admin guide (Rafael Wysocki).
 
  - Add kernel command line option to set pm_debug_messages (Chen Yu).
 
  - Choose schedutil as the preferred scaling governor by default on
    ARM big.LITTLE systems and on x86 systems using the intel_pstate
    driver in the passive mode (Linus Walleij, Rafael Wysocki).
 
  - Drop racy and redundant checks from the PM core's device_prepare()
    routine (Rafael Wysocki).
 
  - Make resume from hibernation take the hibernation_restore() return
    value into account (Dexuan Cui).
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Merge tag 'pm-5.7-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull more power management updates from Rafael Wysocki:
 "Additional power management updates.

  These fix a corner-case suspend-to-idle wakeup issue on systems where
  the ACPI SCI is shared with another wakeup source, add a kernel
  command line option to set pm_debug_messages via the kernel command
  line, add a document desctibing system-wide suspend and resume code
  flows, modify cpufreq Kconfig to choose schedutil as the preferred
  governor by default in a couple of cases and do some assorted
  cleanups.

  Specifics:

   - Fix corner-case suspend-to-idle wakeup issue on systems where the
     ACPI SCI is shared with another wakeup source (Hans de Goede).

   - Add document describing system-wide suspend and resume code flows
     to the admin guide (Rafael Wysocki).

   - Add kernel command line option to set pm_debug_messages (Chen Yu).

   - Choose schedutil as the preferred scaling governor by default on
     ARM big.LITTLE systems and on x86 systems using the intel_pstate
     driver in the passive mode (Linus Walleij, Rafael Wysocki).

   - Drop racy and redundant checks from the PM core's device_prepare()
     routine (Rafael Wysocki).

   - Make resume from hibernation take the hibernation_restore() return
     value into account (Dexuan Cui)"

* tag 'pm-5.7-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  platform/x86: intel_int0002_vgpio: Use acpi_register_wakeup_handler()
  ACPI: PM: Add acpi_[un]register_wakeup_handler()
  Documentation: PM: sleep: Document system-wide suspend code flows
  cpufreq: Select schedutil when using big.LITTLE
  PM: sleep: Add pm_debug_messages kernel command line option
  PM: sleep: core: Drop racy and redundant checks from device_prepare()
  PM: hibernate: Propagate the return value of hibernation_restore()
  cpufreq: intel_pstate: Select schedutil as the default governor
 2020-04-06 10:14:39 -07:00
Hans de Goede
ddfd9dcf27 ACPI: PM: Add acpi_[un]register_wakeup_handler() 
Since commit fdde0ff859 ("ACPI: PM: s2idle: Prevent spurious SCIs from
waking up the system") the SCI triggering without there being a wakeup
cause recognized by the ACPI sleep code will no longer wakeup the system.

This works as intended, but this is a problem for devices where the SCI
is shared with another device which is also a wakeup source.

In the past these, from the pov of the ACPI sleep code, spurious SCIs
would still cause a wakeup so the wakeup from the device sharing the
interrupt would actually wakeup the system. This now no longer works.

This is a problem on e.g. Bay Trail-T and Cherry Trail devices where
some peripherals (typically the XHCI controller) can signal a
Power Management Event (PME) to the Power Management Controller (PMC)
to wakeup the system, this uses the same interrupt as the SCI.
These wakeups are handled through a special INT0002 ACPI device which
checks for events in the GPE0a_STS for this and takes care of acking
the PME so that the shared interrupt stops triggering.

The change to the ACPI sleep code to ignore the spurious SCI, causes
the system to no longer wakeup on these PME events. To make things
worse this means that the INT0002 device driver interrupt handler will
no longer run, causing the PME to not get cleared and resulting in the
system hanging. Trying to wakeup the system after such a PME through e.g.
the power button no longer works.

Add an acpi_register_wakeup_handler() function which registers
a handler to be called from acpi_s2idle_wake() and when the handler
returns true, return true from acpi_s2idle_wake().

The INT0002 driver will use this mechanism to check the GPE0a_STS
register from acpi_s2idle_wake() and to tell the system to wakeup
if a PME is signaled in the register.

Fixes: fdde0ff859 ("ACPI: PM: s2idle: Prevent spurious SCIs from waking up the system")
Cc: 5.4+ <stable@vger.kernel.org> # 5.4+
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
 2020-04-04 19:45:18 +02:00
Kuppuswamy Sathyanarayanan
ac1c8e35a3 PCI/DPC: Add Error Disconnect Recover (EDR) support 
Error Disconnect Recover (EDR) is a feature that allows ACPI firmware to
notify OSPM that a device has been disconnected due to an error condition
(ACPI v6.3, sec 5.6.6).  OSPM advertises its support for EDR on PCI devices
via _OSC (see [1], sec 4.5.1, table 4-4).  The OSPM EDR notify handler
should invalidate software state associated with disconnected devices and
may attempt to recover them.  OSPM communicates the status of recovery to
the firmware via _OST (sec 6.3.5.2).

For PCIe, firmware may use Downstream Port Containment (DPC) to support
EDR.  Per [1], sec 4.5.1, table 4-6, even if firmware has retained control
of DPC, OSPM may read/write DPC control and status registers during the EDR
notification processing window, i.e., from the time it receives an EDR
notification until it clears the DPC Trigger Status.

Note that per [1], sec 4.5.1 and 4.5.2.4,

  1. If the OS supports EDR, it should advertise that to firmware by
     setting OSC_PCI_EDR_SUPPORT in _OSC Support.

  2. If the OS sets OSC_PCI_EXPRESS_DPC_CONTROL in _OSC Control to request
     control of the DPC capability, it must also set OSC_PCI_EDR_SUPPORT in
     _OSC Support.

Add an EDR notify handler to attempt recovery.

[1] Downstream Port Containment Related Enhancements ECN, Jan 28, 2019,
    affecting PCI Firmware Specification, Rev. 3.2
    https://members.pcisig.com/wg/PCI-SIG/document/12888

[bhelgaas: squash add/enable patches into one]
Link: https://lore.kernel.org/r/90f91fe6d25c13f9d2255d2ce97ca15be307e1bb.1585000084.git.sathyanarayanan.kuppuswamy@linux.intel.com
Signed-off-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Cc: Len Brown <lenb@kernel.org>
 2020-03-28 13:19:04 -05:00
Dan Williams
b2ca916ce3 ACPI: NUMA: Up-level "map to online node" functionality 
The acpi_map_pxm_to_online_node() helper is used to find the closest
online node to a given proximity domain. This is used to map devices in
a proximity domain with no online memory or cpus to the closest online
node and populate a device's 'numa_node' property. The numa_node
property allows applications to be migrated "close" to a resource.

In preparation for providing a generic facility to optionally map an
address range to its closest online node, or the node the range would
represent were it to be onlined (target_node), up-level the core of
acpi_map_pxm_to_online_node() to a generic mm/numa helper.

Cc: Michal Hocko <mhocko@suse.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Link: https://lore.kernel.org/r/158188324802.894464.13128795207831894206.stgit@dwillia2-desk3.amr.corp.intel.com
 2020-02-17 10:49:06 -08:00
Rafael J. Wysocki
77fb4e0a55 ACPI: processor: Export acpi_processor_evaluate_cst() 
The intel_idle driver will be modified to use ACPI _CST subsequently
and it will need to call acpi_processor_evaluate_cst(), so move that
function to acpi_processor.c so that it is always present (which is
required by intel_idle) and export it to modules to allow the ACPI
processor driver (which is modular) to call it.

No intentional functional impact.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
 2019-12-27 11:02:07 +01:00
Rafael J. Wysocki
bc94638886 ACPI: processor: Export function to claim _CST control 
The intel_idle driver will be modified to use ACPI _CST subsequently
and it will need to notify the platform firmware of that if
acpi_gbl_FADT.cst_control is set, so add a routine for this purpose,
acpi_processor_claim_cst_control(), to acpi_processor.c (so that it
is always present which is required by intel_idle) and export it
to allow the ACPI processor driver (which is modular) to call it.

No intentional functional impact.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
 2019-12-16 12:06:18 +01:00
Andy Shevchenko
35009c8074 ACPI / utils: Introduce acpi_dev_hid_uid_match() helper 
There are users outside of ACPI realm which reimplementing the comparator
function to check if the given device matches to given HID and UID.

For better utilization, introduce a helper for everyone to use.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
 2019-10-15 12:06:23 +02:00
Linus Torvalds
aefcf2f4b5 Merge branch 'next-lockdown' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security 
Pull kernel lockdown mode from James Morris:
 "This is the latest iteration of the kernel lockdown patchset, from
  Matthew Garrett, David Howells and others.

  From the original description:

    This patchset introduces an optional kernel lockdown feature,
    intended to strengthen the boundary between UID 0 and the kernel.
    When enabled, various pieces of kernel functionality are restricted.
    Applications that rely on low-level access to either hardware or the
    kernel may cease working as a result - therefore this should not be
    enabled without appropriate evaluation beforehand.

    The majority of mainstream distributions have been carrying variants
    of this patchset for many years now, so there's value in providing a
    doesn't meet every distribution requirement, but gets us much closer
    to not requiring external patches.

  There are two major changes since this was last proposed for mainline:

   - Separating lockdown from EFI secure boot. Background discussion is
     covered here: https://lwn.net/Articles/751061/

   -  Implementation as an LSM, with a default stackable lockdown LSM
      module. This allows the lockdown feature to be policy-driven,
      rather than encoding an implicit policy within the mechanism.

  The new locked_down LSM hook is provided to allow LSMs to make a
  policy decision around whether kernel functionality that would allow
  tampering with or examining the runtime state of the kernel should be
  permitted.

  The included lockdown LSM provides an implementation with a simple
  policy intended for general purpose use. This policy provides a coarse
  level of granularity, controllable via the kernel command line:

    lockdown={integrity|confidentiality}

  Enable the kernel lockdown feature. If set to integrity, kernel features
  that allow userland to modify the running kernel are disabled. If set to
  confidentiality, kernel features that allow userland to extract
  confidential information from the kernel are also disabled.

  This may also be controlled via /sys/kernel/security/lockdown and
  overriden by kernel configuration.

  New or existing LSMs may implement finer-grained controls of the
  lockdown features. Refer to the lockdown_reason documentation in
  include/linux/security.h for details.

  The lockdown feature has had signficant design feedback and review
  across many subsystems. This code has been in linux-next for some
  weeks, with a few fixes applied along the way.

  Stephen Rothwell noted that commit 9d1f8be5cf ("bpf: Restrict bpf
  when kernel lockdown is in confidentiality mode") is missing a
  Signed-off-by from its author. Matthew responded that he is providing
  this under category (c) of the DCO"

* 'next-lockdown' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security: (31 commits)
  kexec: Fix file verification on S390
  security: constify some arrays in lockdown LSM
  lockdown: Print current->comm in restriction messages
  efi: Restrict efivar_ssdt_load when the kernel is locked down
  tracefs: Restrict tracefs when the kernel is locked down
  debugfs: Restrict debugfs when the kernel is locked down
  kexec: Allow kexec_file() with appropriate IMA policy when locked down
  lockdown: Lock down perf when in confidentiality mode
  bpf: Restrict bpf when kernel lockdown is in confidentiality mode
  lockdown: Lock down tracing and perf kprobes when in confidentiality mode
  lockdown: Lock down /proc/kcore
  x86/mmiotrace: Lock down the testmmiotrace module
  lockdown: Lock down module params that specify hardware parameters (eg. ioport)
  lockdown: Lock down TIOCSSERIAL
  lockdown: Prohibit PCMCIA CIS storage when the kernel is locked down
  acpi: Disable ACPI table override if the kernel is locked down
  acpi: Ignore acpi_rsdp kernel param when the kernel has been locked down
  ACPI: Limit access to custom_method when the kernel is locked down
  x86/msr: Restrict MSR access when the kernel is locked down
  x86: Lock down IO port access when the kernel is locked down
  ...
 2019-09-28 08:14:15 -07:00
Linus Torvalds
77dcfe2b9e Power management updates for 5.4-rc1 
- Rework the main suspend-to-idle control flow to avoid repeating
    "noirq" device resume and suspend operations in case of spurious
    wakeups from the ACPI EC and decouple the ACPI EC wakeups support
    from the LPS0 _DSM support (Rafael Wysocki).
 
  - Extend the wakeup sources framework to expose wakeup sources as
    device objects in sysfs (Tri Vo, Stephen Boyd).
 
  - Expose system suspend statistics in sysfs (Kalesh Singh).
 
  - Introduce a new haltpoll cpuidle driver and a new matching
    governor for virtualized guests wanting to do guest-side polling
    in the idle loop (Marcelo Tosatti, Joao Martins, Wanpeng Li,
    Stephen Rothwell).
 
  - Fix the menu and teo cpuidle governors to allow the scheduler tick
    to be stopped if PM QoS is used to limit the CPU idle state exit
    latency in some cases (Rafael Wysocki).
 
  - Increase the resolution of the play_idle() argument to microseconds
    for more fine-grained injection of CPU idle cycles (Daniel Lezcano).
 
  - Switch over some users of cpuidle notifiers to the new QoS-based
    frequency limits and drop the CPUFREQ_ADJUST and CPUFREQ_NOTIFY
    policy notifier events (Viresh Kumar).
 
  - Add new cpufreq driver based on nvmem for sun50i (Yangtao Li).
 
  - Add support for MT8183 and MT8516 to the mediatek cpufreq driver
    (Andrew-sh.Cheng, Fabien Parent).
 
  - Add i.MX8MN support to the imx-cpufreq-dt cpufreq driver (Anson
    Huang).
 
  - Add qcs404 to cpufreq-dt-platdev blacklist (Jorge Ramirez-Ortiz).
 
  - Update the qcom cpufreq driver (among other things, to make it
    easier to extend and to use kryo cpufreq for other nvmem-based
    SoCs) and add qcs404 support to it  (Niklas Cassel, Douglas
    RAILLARD, Sibi Sankar, Sricharan R).
 
  - Fix assorted issues and make assorted minor improvements in the
    cpufreq code (Colin Ian King, Douglas RAILLARD, Florian Fainelli,
    Gustavo Silva, Hariprasad Kelam).
 
  - Add new devfreq driver for NVidia Tegra20 (Dmitry Osipenko, Arnd
    Bergmann).
 
  - Add new Exynos PPMU events to devfreq events and extend that
    mechanism (Lukasz Luba).
 
  - Fix and clean up the exynos-bus devfreq driver (Kamil Konieczny).
 
  - Improve devfreq documentation and governor code, fix spelling
    typos in devfreq (Ezequiel Garcia, Krzysztof Kozlowski, Leonard
    Crestez, MyungJoo Ham, Gaël PORTAY).
 
  - Add regulators enable and disable to the OPP (operating performance
    points) framework (Kamil Konieczny).
 
  - Update the OPP framework to support multiple opp-suspend properties
    (Anson Huang).
 
  - Fix assorted issues and make assorted minor improvements in the OPP
    code (Niklas Cassel, Viresh Kumar, Yue Hu).
 
  - Clean up the generic power domains (genpd) framework (Ulf Hansson).
 
  - Clean up assorted pieces of power management code and documentation
    (Akinobu Mita, Amit Kucheria, Chuhong Yuan).
 
  - Update the pm-graph tool to version 5.5 including multiple fixes
    and improvements (Todd Brandt).
 
  - Update the cpupower utility (Benjamin Weis, Geert Uytterhoeven,
    Sébastien Szymanski).
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Merge tag 'pm-5.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull power management updates from Rafael Wysocki:
 "These include a rework of the main suspend-to-idle code flow (related
  to the handling of spurious wakeups), a switch over of several users
  of cpufreq notifiers to QoS-based limits, a new devfreq driver for
  Tegra20, a new cpuidle driver and governor for virtualized guests, an
  extension of the wakeup sources framework to expose wakeup sources as
  device objects in sysfs, and more.

  Specifics:

   - Rework the main suspend-to-idle control flow to avoid repeating
     "noirq" device resume and suspend operations in case of spurious
     wakeups from the ACPI EC and decouple the ACPI EC wakeups support
     from the LPS0 _DSM support (Rafael Wysocki).

   - Extend the wakeup sources framework to expose wakeup sources as
     device objects in sysfs (Tri Vo, Stephen Boyd).

   - Expose system suspend statistics in sysfs (Kalesh Singh).

   - Introduce a new haltpoll cpuidle driver and a new matching governor
     for virtualized guests wanting to do guest-side polling in the idle
     loop (Marcelo Tosatti, Joao Martins, Wanpeng Li, Stephen Rothwell).

   - Fix the menu and teo cpuidle governors to allow the scheduler tick
     to be stopped if PM QoS is used to limit the CPU idle state exit
     latency in some cases (Rafael Wysocki).

   - Increase the resolution of the play_idle() argument to microseconds
     for more fine-grained injection of CPU idle cycles (Daniel
     Lezcano).

   - Switch over some users of cpuidle notifiers to the new QoS-based
     frequency limits and drop the CPUFREQ_ADJUST and CPUFREQ_NOTIFY
     policy notifier events (Viresh Kumar).

   - Add new cpufreq driver based on nvmem for sun50i (Yangtao Li).

   - Add support for MT8183 and MT8516 to the mediatek cpufreq driver
     (Andrew-sh.Cheng, Fabien Parent).

   - Add i.MX8MN support to the imx-cpufreq-dt cpufreq driver (Anson
     Huang).

   - Add qcs404 to cpufreq-dt-platdev blacklist (Jorge Ramirez-Ortiz).

   - Update the qcom cpufreq driver (among other things, to make it
     easier to extend and to use kryo cpufreq for other nvmem-based
     SoCs) and add qcs404 support to it (Niklas Cassel, Douglas
     RAILLARD, Sibi Sankar, Sricharan R).

   - Fix assorted issues and make assorted minor improvements in the
     cpufreq code (Colin Ian King, Douglas RAILLARD, Florian Fainelli,
     Gustavo Silva, Hariprasad Kelam).

   - Add new devfreq driver for NVidia Tegra20 (Dmitry Osipenko, Arnd
     Bergmann).

   - Add new Exynos PPMU events to devfreq events and extend that
     mechanism (Lukasz Luba).

   - Fix and clean up the exynos-bus devfreq driver (Kamil Konieczny).

   - Improve devfreq documentation and governor code, fix spelling typos
     in devfreq (Ezequiel Garcia, Krzysztof Kozlowski, Leonard Crestez,
     MyungJoo Ham, Gaël PORTAY).

   - Add regulators enable and disable to the OPP (operating performance
     points) framework (Kamil Konieczny).

   - Update the OPP framework to support multiple opp-suspend properties
     (Anson Huang).

   - Fix assorted issues and make assorted minor improvements in the OPP
     code (Niklas Cassel, Viresh Kumar, Yue Hu).

   - Clean up the generic power domains (genpd) framework (Ulf Hansson).

   - Clean up assorted pieces of power management code and documentation
     (Akinobu Mita, Amit Kucheria, Chuhong Yuan).

   - Update the pm-graph tool to version 5.5 including multiple fixes
     and improvements (Todd Brandt).

   - Update the cpupower utility (Benjamin Weis, Geert Uytterhoeven,
     Sébastien Szymanski)"

* tag 'pm-5.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (126 commits)
  cpuidle-haltpoll: Enable kvm guest polling when dedicated physical CPUs are available
  cpuidle-haltpoll: do not set an owner to allow modunload
  cpuidle-haltpoll: return -ENODEV on modinit failure
  cpuidle-haltpoll: set haltpoll as preferred governor
  cpuidle: allow governor switch on cpuidle_register_driver()
  PM: runtime: Documentation: add runtime_status ABI document
  pm-graph: make setVal unbuffered again for python2 and python3
  powercap: idle_inject: Use higher resolution for idle injection
  cpuidle: play_idle: Increase the resolution to usec
  cpuidle-haltpoll: vcpu hotplug support
  cpufreq: Add qcs404 to cpufreq-dt-platdev blacklist
  cpufreq: qcom: Add support for qcs404 on nvmem driver
  cpufreq: qcom: Refactor the driver to make it easier to extend
  cpufreq: qcom: Re-organise kryo cpufreq to use it for other nvmem based qcom socs
  dt-bindings: opp: Add qcom-opp bindings with properties needed for CPR
  dt-bindings: opp: qcom-nvmem: Support pstates provided by a power domain
  Documentation: cpufreq: Update policy notifier documentation
  cpufreq: Remove CPUFREQ_ADJUST and CPUFREQ_NOTIFY policy notifier events
  PM / Domains: Verify PM domain type in dev_pm_genpd_set_performance_state()
  PM / Domains: Simplify genpd_lookup_dev()
  ...
 2019-09-17 19:15:14 -07:00
Linus Torvalds
e77fafe9af arm64 updates for 5.4: 
- 52-bit virtual addressing in the kernel
 
 - New ABI to allow tagged user pointers to be dereferenced by syscalls
 
 - Early RNG seeding by the bootloader
 
 - Improve robustness of SMP boot
 
 - Fix TLB invalidation in light of recent architectural clarifications
 
 - Support for i.MX8 DDR PMU
 
 - Remove direct LSE instruction patching in favour of static keys
 
 - Function error injection using kprobes
 
 - Support for the PPTT "thread" flag introduced by ACPI 6.3
 
 - Move PSCI idle code into proper cpuidle driver
 
 - Relaxation of implicit I/O memory barriers
 
 - Build with RELR relocations when toolchain supports them
 
 - Numerous cleanups and non-critical fixes
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Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

Pull arm64 updates from Will Deacon:
 "Although there isn't tonnes of code in terms of line count, there are
  a fair few headline features which I've noted both in the tag and also
  in the merge commits when I pulled everything together.

  The part I'm most pleased with is that we had 35 contributors this
  time around, which feels like a big jump from the usual small group of
  core arm64 arch developers. Hopefully they all enjoyed it so much that
  they'll continue to contribute, but we'll see.

  It's probably worth highlighting that we've pulled in a branch from
  the risc-v folks which moves our CPU topology code out to where it can
  be shared with others.

  Summary:

   - 52-bit virtual addressing in the kernel

   - New ABI to allow tagged user pointers to be dereferenced by
     syscalls

   - Early RNG seeding by the bootloader

   - Improve robustness of SMP boot

   - Fix TLB invalidation in light of recent architectural
     clarifications

   - Support for i.MX8 DDR PMU

   - Remove direct LSE instruction patching in favour of static keys

   - Function error injection using kprobes

   - Support for the PPTT "thread" flag introduced by ACPI 6.3

   - Move PSCI idle code into proper cpuidle driver

   - Relaxation of implicit I/O memory barriers

   - Build with RELR relocations when toolchain supports them

   - Numerous cleanups and non-critical fixes"

* tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (114 commits)
  arm64: remove __iounmap
  arm64: atomics: Use K constraint when toolchain appears to support it
  arm64: atomics: Undefine internal macros after use
  arm64: lse: Make ARM64_LSE_ATOMICS depend on JUMP_LABEL
  arm64: asm: Kill 'asm/atomic_arch.h'
  arm64: lse: Remove unused 'alt_lse' assembly macro
  arm64: atomics: Remove atomic_ll_sc compilation unit
  arm64: avoid using hard-coded registers for LSE atomics
  arm64: atomics: avoid out-of-line ll/sc atomics
  arm64: Use correct ll/sc atomic constraints
  jump_label: Don't warn on __exit jump entries
  docs/perf: Add documentation for the i.MX8 DDR PMU
  perf/imx_ddr: Add support for AXI ID filtering
  arm64: kpti: ensure patched kernel text is fetched from PoU
  arm64: fix fixmap copy for 16K pages and 48-bit VA
  perf/smmuv3: Validate groups for global filtering
  perf/smmuv3: Validate group size
  arm64: Relax Documentation/arm64/tagged-pointers.rst
  arm64: kvm: Replace hardcoded '1' with SYS_PAR_EL1_F
  arm64: mm: Ignore spurious translation faults taken from the kernel
  ...
 2019-09-16 14:31:40 -07:00
Josh Boyer
41fa1ee9c6 acpi: Ignore acpi_rsdp kernel param when the kernel has been locked down 
This option allows userspace to pass the RSDP address to the kernel, which
makes it possible for a user to modify the workings of hardware. Reject
the option when the kernel is locked down. This requires some reworking
of the existing RSDP command line logic, since the early boot code also
makes use of a command-line passed RSDP when locating the SRAT table
before the lockdown code has been initialised. This is achieved by
separating the command line RSDP path in the early boot code from the
generic RSDP path, and then copying the command line RSDP into boot
params in the kernel proper if lockdown is not enabled. If lockdown is
enabled and an RSDP is provided on the command line, this will only be
used when parsing SRAT (which shouldn't permit kernel code execution)
and will be ignored in the rest of the kernel.

(Modified by Matthew Garrett in order to handle the early boot RSDP
environment)

Signed-off-by: Josh Boyer <jwboyer@redhat.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Matthew Garrett <mjg59@google.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
cc: Dave Young <dyoung@redhat.com>
cc: linux-acpi@vger.kernel.org
Signed-off-by: James Morris <jmorris@namei.org>
 2019-08-19 21:54:16 -07:00
Jeremy Linton
bbd1b70639 ACPI/PPTT: Add support for ACPI 6.3 thread flag 
ACPI 6.3 adds a flag to the CPU node to indicate whether
the given PE is a thread. Add a function to return that
information for a given linux logical CPU.

Signed-off-by: Jeremy Linton <jeremy.linton@arm.com>
Reviewed-by: Sudeep Holla <sudeep.holla@arm.com>
Reviewed-by: Robert Richter <rrichter@marvell.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Will Deacon <will@kernel.org>
 2019-08-12 12:59:15 +01:00
Andy Shevchenko
2838bf941b gpiolib-acpi: Move acpi_dev_add_driver_gpios() et al to consumer.h 
The API, which belongs to GPIO library, is foreign to ACPI headers. Earlier
we moved out I²C out of the latter, and now it's time for
acpi_dev_add_driver_gpios() et al.

For time being the acpi_gpio_get_irq_resource() and acpi_dev_gpio_irq_get()
are left untouched as they need more thought about.

Note, it requires uninline acpi_dev_remove_driver_gpios() to keep purity of
consumer.h.

Cc: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Cc: Liam Girdwood <liam.r.girdwood@linux.intel.com>
Cc: Jie Yang <yang.jie@linux.intel.com>
Cc: Mark Brown <broonie@kernel.org>
Cc: alsa-devel@alsa-project.org (moderated list:INTEL ASoC DRIVERS)
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20190730104337.21235-3-andriy.shevchenko@linux.intel.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
 2019-07-31 00:59:19 +02:00
Rafael J. Wysocki
10a08fd65e ACPI: PM: Set up EC GPE for system wakeup from drivers that need it 
The EC GPE needs to be set up for system wakeup only if there is a
driver depending on it, either intel-hid or intel-vbtn, bound to a
button device that is expected to wake up the system from sleep (such
as the power button on some Dell systems, like the XPS13 9360).  It
doesn't need to be set up for waking up the system from sleep in any
other cases and whether or not it is expected to wake up the system
from sleep doesn't depend on whether or not the LPS0 device is
present in the ACPI namespace.

For this reason, rearrange the ACPI suspend-to-idle code to make the
drivers depending on the EC GPE wakeup take care of setting it up and
decouple that from the LPS0 device handling.

While at it, make intel-hid and intel-vbtn prepare for system wakeup
only if they are allowed to wake up the system from sleep by user
space (via sysfs).

[Note that acpi_ec_mark_gpe_for_wake() and acpi_ec_set_gpe_wake_mask()
 are there to prevent the EC GPE from being disabled by the
 acpi_enable_all_wakeup_gpes() call in acpi_s2idle_prepare(), so on
 systems with either intel-hid or intel-vbtn this change doesn't
 affect any interactions with the hardware or platform firmware.]

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
 2019-07-30 12:26:21 +02:00
Linus Torvalds
4b09ddbcd1 Additional ACPI updates for 5.3-rc1 
- Make ACPI table loading work more consistently regardless of the
    exact mechanism used for loading a table (Erik Schmauss).
 
  - Get rid of two clang warnings (Arnd Bergmann).
 
  - Add new quirk mechanism to the ACPI backlight driver and use it
    to add a quirk for PB Easynote MZ35 (Hans de Goede).
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Merge tag 'acpi-5.3-rc1-3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull more ACPI updates from Rafael Wysocki:
 "These get rid of two clang warnings, add a new quirk mechanism to the
  ACPI backlight driver (and apply it to one machine) and update the
  table load object initialization in ACPICA (this is a replacement for
  a previously reverted ACPICA commit).

  Specifics:

   - Make ACPI table loading work more consistently regardless of the
     exact mechanism used for loading a table (Erik Schmauss).

   - Get rid of two clang warnings (Arnd Bergmann).

   - Add new quirk mechanism to the ACPI backlight driver and use it to
     add a quirk for PB Easynote MZ35 (Hans de Goede)"

* tag 'acpi-5.3-rc1-3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  ACPI: video: Add new hw_changes_brightness quirk, set it on PB Easynote MZ35
  ACPI: fix false-positive -Wuninitialized warning
  ACPI: blacklist: fix clang warning for unused DMI table
  ACPICA: Update table load object initialization
 2019-07-18 09:12:34 -07:00
Arnd Bergmann
dfd6f9ad36 ACPI: fix false-positive -Wuninitialized warning 
clang gets confused by an uninitialized variable in what looks
to it like a never executed code path:

arch/x86/kernel/acpi/boot.c:618:13: error: variable 'polarity' is uninitialized when used here [-Werror,-Wuninitialized]
        polarity = polarity ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH;
                   ^~~~~~~~
arch/x86/kernel/acpi/boot.c:606:32: note: initialize the variable 'polarity' to silence this warning
        int rc, irq, trigger, polarity;
                                      ^
                                       = 0
arch/x86/kernel/acpi/boot.c:617:12: error: variable 'trigger' is uninitialized when used here [-Werror,-Wuninitialized]
        trigger = trigger ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE;
                  ^~~~~~~
arch/x86/kernel/acpi/boot.c:606:22: note: initialize the variable 'trigger' to silence this warning
        int rc, irq, trigger, polarity;
                            ^
                             = 0

This is unfortunately a design decision in clang and won't be fixed.

Changing the acpi_get_override_irq() macro to an inline function
reliably avoids the issue.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Nathan Chancellor <natechancellor@gmail.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
 2019-07-15 10:13:41 +02:00
Linus Torvalds
5516745311 platform-drivers-x86 for v5.3-1 
ASUS WMI driver got a big refactoring in order to support the TUF Gaming
 laptops. Besides that, the regression with backlight being permanently off
 on various EeePC laptops has been fixed.
 
 Accelerometer on HP ProBook 450 G0 shows wrong measurements due to
 X axis being inverted. This has been fixed.
 
 Intel PMC core driver has been extended to be ACPI enumerated
 if the DSDT provides device with _HID "INT33A1". This allows
 to convert the driver to be pure platform and support new hardware
 purely based on ACPI DSDT.
 
 From now on the Intel Speed Select Technology is supported thru
 a corresponding driver. This driver provides an access to the features
 of the ISST, such as Performance Profile, Core Power, Base frequency and
 Turbo Frequency.
 
 Mellanox platform drivers has been refactored and now extended
 to support more systems, including new coming ones.
 
 The OLPC XO-1.75 platform is now supported.
 
 CB4063 Beckhoff Automation board is using PMC clocks,
 provided via pmc_atom driver, for ethernet controllers in a way
 that they can't be managed by the clock driver. The quirk
 has been extended to cover this case.
 
 Touchscreen on Chuwi Hi10 Plus tablet has been enabled. Meanwhile
 the information of Chuwi Hi10 Air has been fixed to cover more models
 based on the same platform.
 
 Xiaomi notebooks have WMI interface enabled. Thus, the driver to support it
 has been provided. It required some extension of the generic WMI library,
 which allows to propagate opaque context to the ->probe() of the
 individual drivers.
 
 This release includes debugfs clean up from Greg KH for several drivers
 that drop return code check and make debugfs absence or failure non-fatal.
 
 Miscellaneous fixes here and there, mostly for Acer WMI and
 various Intel drivers.
 
 The listed below commits are duplicated due to previously pushed fixes in v5.2 cycle:
 - 1dd93f873d platform/x86: asus-wmi: Only Tell EC the OS will handle display hotkeys from asus_nb_wmi
 - 89ae3a0736 platform/x86: intel-vbtn: Report switch events when event wakes device
 - fa882fc80d platform/x86: mlx-platform: Fix parent device in i2c-mux-reg device registration
 - 0bfcd24b39 platform/mellanox: mlxreg-hotplug: Add devm_free_irq call to remove flow
 
 The following is an automated git shortlog grouped by driver:
 
 acer-wmi:
  -  Mark expected switch fall-throughs
  -  no need to check return value of debugfs_create functions
 
 asus-nb-wmi:
  -  Add microphone mute key code
 
 asus-wmi:
  -  Use dev_get_drvdata()
  -  Do not disable keyboard backlight on unloading
  -  Switch fan boost mode
  -  Enhance detection of thermal data
  -  Organize code into sections
  -  Refactor error handling
  -  Support WMI event queue
  -  Refactor WMI event handling
  -  Improve DSTS WMI method ID detection
  -  Increase input buffer size of WMI methods
  -  Fix preserving keyboard backlight intensity on load
  -  Fix hwmon device cleanup
  -  no need to check return value of debugfs_create functions
  -  Only Tell EC the OS will handle display hotkeys from asus_nb_wmi
 
 dell-laptop:
  -  no need to check return value of debugfs_create functions
 
 hp_accel:
  -  Add support for HP ProBook 450 G0
 
 ideapad-laptop:
  -  no need to check return value of debugfs_create functions
 
 intel_int0002_vgpio:
  -  Get rid of custom ICPU() macro
 
 intel_menlow:
  -  avoid null pointer deference error
 
 intel_pmc:
  -  no need to check return value of debugfs_create functions
 
 intel_pmc_core:
  -  Attach using APCI HID "INT33A1"
  -  transform Pkg C-state residency from TSC ticks into microseconds
 
 intel_telemetry:
  -  no need to check return value of debugfs_create functions
 
 intel-vbtn:
  -  Report switch events when event wakes device
 
 ISST:
  -  Restore state on resume
  -  Add Intel Speed Select PUNIT MSR interface
  -  Add Intel Speed Select mailbox interface via MSRs
  -  Add Intel Speed Select mailbox interface via PCI
  -  Add Intel Speed Select mmio interface
  -  Add IOCTL to Translate Linux logical CPU to PUNIT CPU number
  -  Store per CPU information
  -  Add common API to register and handle ioctls
  -  Update ioctl-number.txt for Intel Speed Select interface
  -  A tool to validate Intel Speed Select commands
  -  Add .gitignore file
 
 MAINTAINERS:
  -  Update for Intel Speed Select Technology
 
 mlx-platform:
  -  Fix error handling in mlxplat_init()
  -  Add more reset cause attributes
  -  Modify DMI matching order
  -  Add regmap structure for the next generation systems
  -  Change API for i2c-mlxcpld driver activation
  -  Move regmap initialization before all drivers activation
  -  Fix parent device in i2c-mux-reg device registration
  -  Add new attribute for mlxreg-io sysfs interfaces
 
 pcengines-apuv2:
  -  Make two symbols static
  -  Fix PCENGINES_APU2 Kconfig warning
 
 OLPC:
  -  Add a config menu category for XO 1.75
  -  Require CONFIG_POWER_SUPPLY for XO-1.75 EC
  -  Fix olpc_xo175_ec_cmd() return value
  -  Make olpc_dt_compatible_match() static __init
  -  Add INPUT dependencies
  -  Fix build error without CONFIG_SPI
  -  Add a regulator for the DCON
  -  Add XO-1.75 EC driver
  -  Use BIT() and GENMASK() for event masks
  -  Avoid a warning if the EC didn't register yet
  -  Move EC-specific functionality out from x86
  -  Remove an unused include
  -  Add OLPC XO-1.75 EC bindings
 
 platform/mellanox:
  -  mlxreg-hotplug: Add devm_free_irq call to remove flow
 
 pmc_atom:
  -  Add CB4063 Beckhoff Automation board to critclk_systems DMI table
  -  no need to check return value of debugfs_create functions
 
 Kconfig:
  - Remove left-over BACKLIGHT_LCD_SUPPORT
 
 samsung-laptop:
  -  no need to check return value of debugfs_create functions
 
 touchscreen_dmi:
  -  Update Hi10 Air filter
  -  Add info for the CHUWI Hi10 Plus tablet.
 
 wmi:
  -  add Xiaomi WMI key driver
  -  add context argument to the probe function
  -  add context pointer field to struct wmi_device_id
  -  Add function to get _UID of WMI device
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Merge tag 'platform-drivers-x86-v5.3-1' of git://git.infradead.org/linux-platform-drivers-x86

Pull x86 platform driver updates from Andy Shevchenko:
 "Gathered a bunch of x86 platform driver changes. It's rather big,
  since includes two big refactors and completely new driver:

   - ASUS WMI driver got a big refactoring in order to support the TUF
     Gaming laptops. Besides that, the regression with backlight being
     permanently off on various EeePC laptops has been fixed.

   - Accelerometer on HP ProBook 450 G0 shows wrong measurements due to
     X axis being inverted. This has been fixed.

   - Intel PMC core driver has been extended to be ACPI enumerated if
     the DSDT provides device with _HID "INT33A1". This allows to
     convert the driver to be pure platform and support new hardware
     purely based on ACPI DSDT.

   - From now on the Intel Speed Select Technology is supported thru a
     corresponding driver. This driver provides an access to the
     features of the ISST, such as Performance Profile, Core Power, Base
     frequency and Turbo Frequency.

   - Mellanox platform drivers has been refactored and now extended to
     support more systems, including new coming ones.

   - The OLPC XO-1.75 platform is now supported.

   - CB4063 Beckhoff Automation board is using PMC clocks, provided via
     pmc_atom driver, for ethernet controllers in a way that they can't
     be managed by the clock driver. The quirk has been extended to
     cover this case.

   - Touchscreen on Chuwi Hi10 Plus tablet has been enabled. Meanwhile
     the information of Chuwi Hi10 Air has been fixed to cover more
     models based on the same platform.

   - Xiaomi notebooks have WMI interface enabled. Thus, the driver to
     support it has been provided. It required some extension of the
     generic WMI library, which allows to propagate opaque context to
     the ->probe() of the individual drivers.

  This release includes debugfs clean up from Greg KH for several
  drivers that drop return code check and make debugfs absence or
  failure non-fatal.

  Also miscellaneous fixes here and there, mostly for Acer WMI and
  various Intel drivers"

* tag 'platform-drivers-x86-v5.3-1' of git://git.infradead.org/linux-platform-drivers-x86: (74 commits)
  platform/x86: Fix PCENGINES_APU2 Kconfig warning
  tools/power/x86/intel-speed-select: Add .gitignore file
  platform/x86: mlx-platform: Fix error handling in mlxplat_init()
  platform/x86: intel_pmc_core: Attach using APCI HID "INT33A1"
  platform/x86: intel_pmc_core: transform Pkg C-state residency from TSC ticks into microseconds
  platform/x86: asus-wmi: Use dev_get_drvdata()
  Documentation/ABI: Add new attribute for mlxreg-io sysfs interfaces
  platform/x86: mlx-platform: Add more reset cause attributes
  platform/x86: mlx-platform: Modify DMI matching order
  platform/x86: mlx-platform: Add regmap structure for the next generation systems
  platform/x86: mlx-platform: Change API for i2c-mlxcpld driver activation
  platform/x86: mlx-platform: Move regmap initialization before all drivers activation
  MAINTAINERS: Update for Intel Speed Select Technology
  tools/power/x86: A tool to validate Intel Speed Select commands
  platform/x86: ISST: Restore state on resume
  platform/x86: ISST: Add Intel Speed Select PUNIT MSR interface
  platform/x86: ISST: Add Intel Speed Select mailbox interface via MSRs
  platform/x86: ISST: Add Intel Speed Select mailbox interface via PCI
  platform/x86: ISST: Add Intel Speed Select mmio interface
  platform/x86: ISST: Add IOCTL to Translate Linux logical CPU to PUNIT CPU number
  ...
 2019-07-14 16:51:47 -07:00
Linus Torvalds
cf2d213e49 Power management updates for 5.3-rc1 
- Improve the handling of shared ACPI power resources in the PCI
    bus type layer (Mika Westerberg).
 
  - Make the PCI layer take link delays required by the PCIe spec
    into account as appropriate and avoid polling devices in D3cold
    for PME (Mika Westerberg).
 
  - Fix some corner case issues in ACPI device power management and
    in the PCI bus type layer, optimiza and clean up the handling of
    runtime-suspended PCI devices during system-wide transitions to
    sleep states (Rafael Wysocki).
 
  - Rework hibernation handling in the ACPI core and the PCI bus type
    to resume runtime-suspended devices before hibernation (which
    allows some functional problems to be avoided) and fix some ACPI
    power management issues related to hiberation (Rafael Wysocki).
 
  - Extend the operating performance points (OPP) framework to support
    a wider range of devices (Rajendra Nayak, Stehpen Boyd).
 
  - Fix issues related to genpd_virt_devs and issues with platforms
    using the set_opp() callback in the OPP framework (Viresh Kumar,
    Dmitry Osipenko).
 
  - Add new cpufreq driver for Raspberry Pi (Nicolas Saenz Julienne).
 
  - Add new cpufreq driver for imx8m and imx7d chips (Leonard Crestez).
 
  - Fix and clean up the pcc-cpufreq, brcmstb-avs-cpufreq, s5pv210,
    and armada-37xx cpufreq drivers (David Arcari, Florian Fainelli,
    Paweł Chmiel, YueHaibing).
 
  - Clean up and fix the cpufreq core (Viresh Kumar, Daniel Lezcano).
 
  - Fix minor issue in the ACPI system sleep support code and export
    one function from it (Lenny Szubowicz, Dexuan Cui).
 
  - Clean up assorted pieces of PM code and documentation (Kefeng Wang,
    Andy Shevchenko, Bart Van Assche, Greg Kroah-Hartman, Fuqian Huang,
    Geert Uytterhoeven, Mathieu Malaterre, Rafael Wysocki).
 
  - Update the pm-graph utility to v5.4 (Todd Brandt).
 
  - Fix and clean up the cpupower utility (Abhishek Goel, Nick Black).
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Merge tag 'pm-5.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull power management updates from Rafael Wysocki:
 "These update PCI and ACPI power management (improved handling of ACPI
  power resources and PCIe link delays, fixes related to corner cases,
  hibernation handling rework), fix and extend the operating performance
  points (OPP) framework, add new cpufreq drivers for Raspberry Pi and
  imx8m chips, update some other cpufreq drivers, clean up assorted
  pieces of PM code and documentation and update tools.

  Specifics:

   - Improve the handling of shared ACPI power resources in the PCI bus
     type layer (Mika Westerberg).

   - Make the PCI layer take link delays required by the PCIe spec into
     account as appropriate and avoid polling devices in D3cold for PME
     (Mika Westerberg).

   - Fix some corner case issues in ACPI device power management and in
     the PCI bus type layer, optimiza and clean up the handling of
     runtime-suspended PCI devices during system-wide transitions to
     sleep states (Rafael Wysocki).

   - Rework hibernation handling in the ACPI core and the PCI bus type
     to resume runtime-suspended devices before hibernation (which
     allows some functional problems to be avoided) and fix some ACPI
     power management issues related to hiberation (Rafael Wysocki).

   - Extend the operating performance points (OPP) framework to support
     a wider range of devices (Rajendra Nayak, Stehpen Boyd).

   - Fix issues related to genpd_virt_devs and issues with platforms
     using the set_opp() callback in the OPP framework (Viresh Kumar,
     Dmitry Osipenko).

   - Add new cpufreq driver for Raspberry Pi (Nicolas Saenz Julienne).

   - Add new cpufreq driver for imx8m and imx7d chips (Leonard Crestez).

   - Fix and clean up the pcc-cpufreq, brcmstb-avs-cpufreq, s5pv210, and
     armada-37xx cpufreq drivers (David Arcari, Florian Fainelli, Paweł
     Chmiel, YueHaibing).

   - Clean up and fix the cpufreq core (Viresh Kumar, Daniel Lezcano).

   - Fix minor issue in the ACPI system sleep support code and export
     one function from it (Lenny Szubowicz, Dexuan Cui).

   - Clean up assorted pieces of PM code and documentation (Kefeng Wang,
     Andy Shevchenko, Bart Van Assche, Greg Kroah-Hartman, Fuqian Huang,
     Geert Uytterhoeven, Mathieu Malaterre, Rafael Wysocki).

   - Update the pm-graph utility to v5.4 (Todd Brandt).

   - Fix and clean up the cpupower utility (Abhishek Goel, Nick Black)"

* tag 'pm-5.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (57 commits)
  ACPI: PM: Make acpi_sleep_state_supported() non-static
  PM: sleep: Drop dev_pm_skip_next_resume_phases()
  ACPI: PM: Unexport acpi_device_get_power()
  Documentation: ABI: power: Add missing newline at end of file
  ACPI: PM: Drop unused function and function header
  ACPI: PM: Introduce "poweroff" callbacks for ACPI PM domain and LPSS
  ACPI: PM: Simplify and fix PM domain hibernation callbacks
  PCI: PM: Simplify bus-level hibernation callbacks
  PM: ACPI/PCI: Resume all devices during hibernation
  cpufreq: Avoid calling cpufreq_verify_current_freq() from handle_update()
  cpufreq: Consolidate cpufreq_update_current_freq() and __cpufreq_get()
  kernel: power: swap: use kzalloc() instead of kmalloc() followed by memset()
  cpufreq: Don't skip frequency validation for has_target() drivers
  PCI: PM/ACPI: Refresh all stale power state data in pci_pm_complete()
  PCI / ACPI: Add _PR0 dependent devices
  ACPI / PM: Introduce concept of a _PR0 dependent device
  PCI / ACPI: Use cached ACPI device state to get PCI device power state
  ACPI: PM: Allow transitions to D0 to occur in special cases
  ACPI: PM: Avoid evaluating _PS3 on transitions from D3hot to D3cold
  cpufreq: Use has_target() instead of !setpolicy
  ...
 2019-07-09 10:05:22 -07:00
Linus Torvalds
2a1ccd3142 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 provides the usual mixed bag:

  Core:

   - Further improvements to the irq timings code which aims to predict
     the next interrupt for power state selection to achieve better
     latency/power balance

   - Add interrupt statistics to the core NMI handlers

   - The usual small fixes and cleanups

  Drivers:

   - Support for Renesas RZ/A1, Annapurna Labs FIC, Meson-G12A SoC and
     Amazon Gravition AMR/GIC interrupt controllers.

   - Rework of the Renesas INTC controller driver

   - ACPI support for Socionext SoCs

   - Enhancements to the CSKY interrupt controller

   - The usual small fixes and cleanups"

* 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (39 commits)
  irq/irqdomain: Fix comment typo
  genirq: Update irq stats from NMI handlers
  irqchip/gic-pm: Remove PM_CLK dependency
  irqchip/al-fic: Introduce Amazon's Annapurna Labs Fabric Interrupt Controller Driver
  dt-bindings: interrupt-controller: Add Amazon's Annapurna Labs FIC
  softirq: Use __this_cpu_write() in takeover_tasklets()
  irqchip/mbigen: Stop printing kernel addresses
  irqchip/gic: Add dependency for ARM_GIC_MAX_NR
  genirq/affinity: Remove unused argument from [__]irq_build_affinity_masks()
  genirq/timings: Add selftest for next event computation
  genirq/timings: Add selftest for irqs circular buffer
  genirq/timings: Add selftest for circular array
  genirq/timings: Encapsulate storing function
  genirq/timings: Encapsulate timings push
  genirq/timings: Optimize the period detection speed
  genirq/timings: Fix timings buffer inspection
  genirq/timings: Fix next event index function
  irqchip/qcom: Use struct_size() in devm_kzalloc()
  irqchip/irq-csky-mpintc: Remove unnecessary loop in interrupt handler
  dt-bindings: interrupt-controller: Update csky mpintc
  ...
 2019-07-08 11:01:13 -07:00
Rafael J. Wysocki
99465f12ba ACPI: PM: Drop unused function and function header 
Remove a leftover function header and a static inline stub with no
users from the ACPI header file.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
 2019-07-03 00:13:24 +02:00
Rafael J. Wysocki
c95b7595f8 ACPI: PM: Introduce "poweroff" callbacks for ACPI PM domain and LPSS 
In general, it is not correct to call pm_generic_suspend(),
pm_generic_suspend_late() and pm_generic_suspend_noirq() during the
hibernation's "poweroff" transition, because device drivers may
provide special callbacks to be invoked then and the wrappers in
question cause system suspend callbacks to be run.  Unfortunately,
that happens in the ACPI PM domain and ACPI LPSS.

To address this potential issue, introduce "poweroff" callbacks
for the ACPI PM and LPSS that will use pm_generic_poweroff(),
pm_generic_poweroff_late() and pm_generic_poweroff_noirq() as
appropriate.

Fixes: 05087360fd (ACPI / PM: Take SMART_SUSPEND driver flag into account)
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
 2019-07-03 00:13:24 +02:00
Rafael J. Wysocki
3cd7957e85 ACPI: PM: Simplify and fix PM domain hibernation callbacks 
First, after a previous change causing all runtime-suspended devices
in the ACPI PM domain (and ACPI LPSS devices) to be resumed before
creating a snapshot image of memory during hibernation, it is not
necessary to worry about the case in which them might be left in
runtime-suspend any more, so get rid of the code related to that from
ACPI PM domain and ACPI LPSS hibernation callbacks.

Second, it is not correct to use pm_generic_resume_early() and
acpi_subsys_resume_noirq() in hibernation "restore" callbacks (which
currently happens in the ACPI PM domain and ACPI LPSS), so introduce
proper _restore_late and _restore_noirq callbacks for the ACPI PM
domain and ACPI LPSS.

Fixes: 05087360fd (ACPI / PM: Take SMART_SUSPEND driver flag into account)
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
 2019-07-03 00:13:24 +02:00
Jeremy Linton
56855a99f3 ACPI/PPTT: Add function to return ACPI 6.3 Identical tokens 
ACPI 6.3 adds a flag to indicate that child nodes are all
identical cores. This is useful to authoritatively determine
if a set of (possibly offline) cores are identical or not.

Since the flag doesn't give us a unique id we can generate
one and use it to create bitmaps of sibling nodes, or simply
in a loop to determine if a subset of cores are identical.

Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Tested-by: Hanjun Guo <hanjun.guo@linaro.org>
Reviewed-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Jeremy Linton <jeremy.linton@arm.com>
Signed-off-by: Will Deacon <will@kernel.org>
 2019-06-27 16:53:18 +01:00
Yurii Pavlovskyi
e7488e58c7 platform/x86: wmi: Add function to get _UID of WMI device 
Add a new function to acpi.h / wmi.c that returns _UID of the ACPI WMI
device. For example, it returns "ATK" for the following declaration in
DSDT:
Device (ATKD)
{
    Name (_HID, "PNP0C14" /* Windows Management Instrumentation Device */)
      // _HID: Hardware ID
    Name (_UID, "ATK")  // _UID: Unique ID
    ..

Generally, it is possible that multiple PNP0C14 ACPI devices are present in
the system as mentioned in the commit message of commit bff431e49f
("ACPI: WMI: Add ACPI-WMI mapping driver").

Therefore the _UID is returned for a specific ACPI device that declares the
given GUID, to which it is also mapped by other methods of wmi module.

Signed-off-by: Yurii Pavlovskyi <yurii.pavlovskyi@gmail.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
 2019-06-17 15:22:47 +03:00
Thomas Gleixner
c942fddf87 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157 
Based on 3 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license as published by
  the free software foundation either version 2 of the license or at
  your option any later version this program is distributed in the
  hope that it will be useful but without any warranty without even
  the implied warranty of merchantability or fitness for a particular
  purpose see the gnu general public license for more details

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license as published by
  the free software foundation either version 2 of the license or at
  your option any later version [author] [kishon] [vijay] [abraham]
  [i] [kishon]@[ti] [com] this program is distributed in the hope that
  it will be useful but without any warranty without even the implied
  warranty of merchantability or fitness for a particular purpose see
  the gnu general public license for more details

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license as published by
  the free software foundation either version 2 of the license or at
  your option any later version [author] [graeme] [gregory]
  [gg]@[slimlogic] [co] [uk] [author] [kishon] [vijay] [abraham] [i]
  [kishon]@[ti] [com] [based] [on] [twl6030]_[usb] [c] [author] [hema]
  [hk] [hemahk]@[ti] [com] this program is distributed in the hope
  that it will be useful but without any warranty without even the
  implied warranty of merchantability or fitness for a particular
  purpose see the gnu general public license for more details

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 1105 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070033.202006027@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 2019-05-30 11:26:37 -07:00
Ard Biesheuvel
621dc2fdce acpi/irq: Implement helper to create hierachical domains 
ACPI permits arbitrary producer->consumer interrupt links to be
described in AML, which means a topology such as the following
is perfectly legal:

  Device (EXIU) {
    Name (_HID, "SCX0008")
    Name (_UID, Zero)
    Name (_CRS, ResourceTemplate () {
      ...
    })
  }

  Device (GPIO) {
    Name (_HID, "SCX0007")
    Name (_UID, Zero)
    Name (_CRS, ResourceTemplate () {
      Memory32Fixed (ReadWrite, SYNQUACER_GPIO_BASE, SYNQUACER_GPIO_SIZE)
      Interrupt (ResourceConsumer, Edge, ActiveHigh, ExclusiveAndWake, 0, "\\_SB.EXIU") {
        7,
      }
    })
    ...
  }

The EXIU in this example is the external interrupt unit as can be found
on Socionext SynQuacer based platforms, which converts a block of 32 SPIs
from arbitrary polarity/trigger into level-high, with a separate set
of config/mask/unmask/clear controls.

The existing DT based driver in drivers/irqchip/irq-sni-exiu.c models
this as a hierarchical domain stacked on top of the GIC's irqdomain.
Since the GIC is modeled as a DT node as well, obtaining a reference
to this irqdomain is easily done by going through the parent link.

On ACPI systems, however, the GIC is not modeled as an object in the
namespace, and so device objects cannot refer to it directly. So in
order to obtain the irqdomain reference when driving the EXIU in ACPI
mode, we need a helper that implicitly grabs the default domain as the
parent of the hierarchy for interrupts allocated out of the global GSI
pool.

Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
 2019-05-28 14:54:54 +01:00
Linus Torvalds
414147d99b pci-v5.2-changes 
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Merge tag 'pci-v5.2-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci

Pull PCI updates from Bjorn Helgaas:
 "Enumeration changes:

   - Add _HPX Type 3 settings support, which gives firmware more
     influence over device configuration (Alexandru Gagniuc)

   - Support fixed bus numbers from bridge Enhanced Allocation
     capabilities (Subbaraya Sundeep)

   - Add "external-facing" DT property to identify cases where we
     require IOMMU protection against untrusted devices (Jean-Philippe
     Brucker)

   - Enable PCIe services for host controller drivers that use managed
     host bridge alloc (Jean-Philippe Brucker)

   - Log PCIe port service messages with pci_dev, not the pcie_device
     (Frederick Lawler)

   - Convert pciehp from pciehp_debug module parameter to generic
     dynamic debug (Frederick Lawler)

  Peer-to-peer DMA:

   - Add whitelist of Root Complexes that support peer-to-peer DMA
     between Root Ports (Christian König)

  Native controller drivers:

   - Add PCI host bridge DMA ranges for bridges that can't DMA
     everywhere, e.g., iProc (Srinath Mannam)

   - Add Amazon Annapurna Labs PCIe host controller driver (Jonathan
     Chocron)

   - Fix Tegra MSI target allocation so DMA doesn't generate unwanted
     MSIs (Vidya Sagar)

   - Fix of_node reference leaks (Wen Yang)

   - Fix Hyper-V module unload & device removal issues (Dexuan Cui)

   - Cleanup R-Car driver (Marek Vasut)

   - Cleanup Keystone driver (Kishon Vijay Abraham I)

   - Cleanup i.MX6 driver (Andrey Smirnov)

  Significant bug fixes:

   - Reset Lenovo ThinkPad P50 GPU so nouveau works after reboot (Lyude
     Paul)

   - Fix Switchtec firmware update performance issue (Wesley Sheng)

   - Work around Pericom switch link retraining erratum (Stefan Mätje)"

* tag 'pci-v5.2-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (141 commits)
  MAINTAINERS: Add Karthikeyan Mitran and Hou Zhiqiang for Mobiveil PCI
  PCI: pciehp: Remove pointless MY_NAME definition
  PCI: pciehp: Remove pointless PCIE_MODULE_NAME definition
  PCI: pciehp: Remove unused dbg/err/info/warn() wrappers
  PCI: pciehp: Log messages with pci_dev, not pcie_device
  PCI: pciehp: Replace pciehp_debug module param with dyndbg
  PCI: pciehp: Remove pciehp_debug uses
  PCI/AER: Log messages with pci_dev, not pcie_device
  PCI/DPC: Log messages with pci_dev, not pcie_device
  PCI/PME: Replace dev_printk(KERN_DEBUG) with dev_info()
  PCI/AER: Replace dev_printk(KERN_DEBUG) with dev_info()
  PCI: Replace dev_printk(KERN_DEBUG) with dev_info(), etc
  PCI: Replace printk(KERN_INFO) with pr_info(), etc
  PCI: Use dev_printk() when possible
  PCI: Cleanup setup-bus.c comments and whitespace
  PCI: imx6: Allow asynchronous probing
  PCI: dwc: Save root bus for driver remove hooks
  PCI: dwc: Use devm_pci_alloc_host_bridge() to simplify code
  PCI: dwc: Free MSI in dw_pcie_host_init() error path
  PCI: dwc: Free MSI IRQ page in dw_pcie_free_msi()
  ...
 2019-05-14 10:30:10 -07:00
Linus Torvalds
cf482a49af Driver core/kobject patches for 5.2-rc1 
Here is the "big" set of driver core patches for 5.2-rc1
 
 There are a number of ACPI patches in here as well, as Rafael said they
 should go through this tree due to the driver core changes they
 required.  They have all been acked by the ACPI developers.
 
 There are also a number of small subsystem-specific changes in here, due
 to some changes to the kobject core code.  Those too have all been acked
 by the various subsystem maintainers.
 
 As for content, it's pretty boring outside of the ACPI changes:
   - spdx cleanups
   - kobject documentation updates
   - default attribute groups for kobjects
   - other minor kobject/driver core fixes
 
 All have been in linux-next for a while with no reported issues.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'driver-core-5.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core

Pull driver core/kobject updates from Greg KH:
 "Here is the "big" set of driver core patches for 5.2-rc1

  There are a number of ACPI patches in here as well, as Rafael said
  they should go through this tree due to the driver core changes they
  required. They have all been acked by the ACPI developers.

  There are also a number of small subsystem-specific changes in here,
  due to some changes to the kobject core code. Those too have all been
  acked by the various subsystem maintainers.

  As for content, it's pretty boring outside of the ACPI changes:
   - spdx cleanups
   - kobject documentation updates
   - default attribute groups for kobjects
   - other minor kobject/driver core fixes

  All have been in linux-next for a while with no reported issues"

* tag 'driver-core-5.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (47 commits)
  kobject: clean up the kobject add documentation a bit more
  kobject: Fix kernel-doc comment first line
  kobject: Remove docstring reference to kset
  firmware_loader: Fix a typo ("syfs" -> "sysfs")
  kobject: fix dereference before null check on kobj
  Revert "driver core: platform: Fix the usage of platform device name(pdev->name)"
  init/config: Do not select BUILD_BIN2C for IKCONFIG
  Provide in-kernel headers to make extending kernel easier
  kobject: Improve doc clarity kobject_init_and_add()
  kobject: Improve docs for kobject_add/del
  driver core: platform: Fix the usage of platform device name(pdev->name)
  livepatch: Replace klp_ktype_patch's default_attrs with groups
  cpufreq: schedutil: Replace default_attrs field with groups
  padata: Replace padata_attr_type default_attrs field with groups
  irqdesc: Replace irq_kobj_type's default_attrs field with groups
  net-sysfs: Replace ktype default_attrs field with groups
  block: Replace all ktype default_attrs with groups
  samples/kobject: Replace foo_ktype's default_attrs field with groups
  kobject: Add support for default attribute groups to kobj_type
  driver core: Postpone DMA tear-down until after devres release for probe failure
  ...
 2019-05-07 13:01:40 -07:00
Alexandru Gagniuc
ba11edc650 PCI/ACPI: Advertise _HPX Type 3 support via _OSC 
_OSC now has a way to inform firmware that OS has the capability to
interpret _HPX Type 3 setting records.  This was added by the following
PCI Firmware Specification ECN:

  ECN:  _HPX and PCIe Completion Timeout related _OSC Enhancements
  Date:	September 12, 2018
  Affected Document: PCI Firmware Specification, Rev. 3.2

Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
 2019-04-23 16:38:16 -05:00
YueHaibing
fe066621c7 gpio: merrifield: Fix build err without CONFIG_ACPI 
When building CONFIG_ACPI is not set
gcc warn this:

drivers/gpio/gpio-merrifield.c: In function mrfld_gpio_get_pinctrl_dev_name:
drivers/gpio/gpio-merrifield.c:388:19: error: dereferencing pointer to incomplete type struct acpi_device
   put_device(&adev->dev);
                   ^~

Reported-by: Hulk Robot <hulkci@huawei.com>
Fixes: d00d2109c3 ("gpio: merrifield: Convert to use acpi_dev_get_first_match_dev()")
Suggested-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
 2019-04-23 11:30:59 +02:00
Keith Busch
3bc0e8eb17 acpi: Add HMAT to generic parsing tables 
The Heterogeneous Memory Attribute Table (HMAT) header has different
field lengths than the existing parsing uses. Add the HMAT type to the
parsing rules so it may be generically parsed.

Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Tested-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Keith Busch <keith.busch@intel.com>
Tested-by: Brice Goglin <Brice.Goglin@inria.fr>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 2019-04-04 18:41:20 +02:00
Keith Busch
60574d1e05 acpi: Create subtable parsing infrastructure 
Parsing entries in an ACPI table had assumed a generic header
structure. There is no standard ACPI header, though, so less common
layouts with different field sizes required custom parsers to go through
their subtable entry list.

Create the infrastructure for adding different table types so parsing
the entries array may be more reused for all ACPI system tables and
the common code doesn't need to be duplicated.

Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Tested-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Keith Busch <keith.busch@intel.com>
Tested-by: Brice Goglin <Brice.Goglin@inria.fr>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 2019-04-04 18:41:12 +02:00
Andy Shevchenko
257f9053c0 ACPI / utils: Remove deprecated function since no user left 
There is no more user of acpi_dev_get_first_match_name(),
which is deprecated and has no user left, so, remove it for good.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
 2019-04-01 11:00:16 +02:00
Andy Shevchenko
817b4d64da ACPI / utils: Introduce acpi_dev_get_first_match_dev() helper 
The acpi_dev_get_first_match_name() is missing put_device() call
and thus keeping reference counting unbalanced.

In order to fix the issue introduce a new helper to convert existing users
one-by-one to a better API.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
 2019-04-01 10:55:56 +02:00
Linus Torvalds
f67e3fb489 device-dax for 5.1 
* Replace the /sys/class/dax device model with /sys/bus/dax, and include
   a compat driver so distributions can opt-in to the new ABI.
 
 * Allow for an alternative driver for the device-dax address-range
 
 * Introduce the 'kmem' driver to hotplug / assign a device-dax
   address-range to the core-mm.
 
 * Arrange for the device-dax target-node to be onlined so that the newly
   added memory range can be uniquely referenced by numa apis.
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Merge tag 'devdax-for-5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm

Pull device-dax updates from Dan Williams:
 "New device-dax infrastructure to allow persistent memory and other
  "reserved" / performance differentiated memories, to be assigned to
  the core-mm as "System RAM".

  Some users want to use persistent memory as additional volatile
  memory. They are willing to cope with potential performance
  differences, for example between DRAM and 3D Xpoint, and want to use
  typical Linux memory management apis rather than a userspace memory
  allocator layered over an mmap() of a dax file. The administration
  model is to decide how much Persistent Memory (pmem) to use as System
  RAM, create a device-dax-mode namespace of that size, and then assign
  it to the core-mm. The rationale for device-dax is that it is a
  generic memory-mapping driver that can be layered over any "special
  purpose" memory, not just pmem. On subsequent boots udev rules can be
  used to restore the memory assignment.

  One implication of using pmem as RAM is that mlock() no longer keeps
  data off persistent media. For this reason it is recommended to enable
  NVDIMM Security (previously merged for 5.0) to encrypt pmem contents
  at rest. We considered making this recommendation an actively enforced
  requirement, but in the end decided to leave it as a distribution /
  administrator policy to allow for emulation and test environments that
  lack security capable NVDIMMs.

  Summary:

   - Replace the /sys/class/dax device model with /sys/bus/dax, and
     include a compat driver so distributions can opt-in to the new ABI.

   - Allow for an alternative driver for the device-dax address-range

   - Introduce the 'kmem' driver to hotplug / assign a device-dax
     address-range to the core-mm.

   - Arrange for the device-dax target-node to be onlined so that the
     newly added memory range can be uniquely referenced by numa apis"

NOTE! I'm not entirely happy with the whole "PMEM as RAM" model because
we currently have special - and very annoying rules in the kernel about
accessing PMEM only with the "MC safe" accessors, because machine checks
inside the regular repeat string copy functions can be fatal in some
(not described) circumstances.

And apparently the PMEM modules can cause that a lot more than regular
RAM.  The argument is that this happens because PMEM doesn't necessarily
get scrubbed at boot like RAM does, but that is planned to be added for
the user space tooling.

Quoting Dan from another email:
 "The exposure can be reduced in the volatile-RAM case by scanning for
  and clearing errors before it is onlined as RAM. The userspace tooling
  for that can be in place before v5.1-final. There's also runtime
  notifications of errors via acpi_nfit_uc_error_notify() from
  background scrubbers on the DIMM devices. With that mechanism the
  kernel could proactively clear newly discovered poison in the volatile
  case, but that would be additional development more suitable for v5.2.

  I understand the concern, and the need to highlight this issue by
  tapping the brakes on feature development, but I don't see PMEM as RAM
  making the situation worse when the exposure is also there via DAX in
  the PMEM case. Volatile-RAM is arguably a safer use case since it's
  possible to repair pages where the persistent case needs active
  application coordination"

* tag 'devdax-for-5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
  device-dax: "Hotplug" persistent memory for use like normal RAM
  mm/resource: Let walk_system_ram_range() search child resources
  mm/memory-hotplug: Allow memory resources to be children
  mm/resource: Move HMM pr_debug() deeper into resource code
  mm/resource: Return real error codes from walk failures
  device-dax: Add a 'modalias' attribute to DAX 'bus' devices
  device-dax: Add a 'target_node' attribute
  device-dax: Auto-bind device after successful new_id
  acpi/nfit, device-dax: Identify differentiated memory with a unique numa-node
  device-dax: Add /sys/class/dax backwards compatibility
  device-dax: Add support for a dax override driver
  device-dax: Move resource pinning+mapping into the common driver
  device-dax: Introduce bus + driver model
  device-dax: Start defining a dax bus model
  device-dax: Remove multi-resource infrastructure
  device-dax: Kill dax_region base
  device-dax: Kill dax_region ida
 2019-03-16 13:05:32 -07:00
Linus Torvalds
6c3f98fadd Merge branch 'i2c/for-5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux 
Pull i2c updates from Wolfram Sang:

 - the I2C core gained helpers to assist drivers in handling their
   suspended state, and drivers were converted to use it

 - two new fault-injectors for stress-testing

 - bigger refactoring and feature improvements for the ocores,
   sh_mobile, and tegra drivers

 - platform_data removal for the at24 EEPROM driver

 - ... and various improvements and bugfixes all over the subsystem

* 'i2c/for-5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: (69 commits)
  i2c: Allow recovery of the initial IRQ by an I2C client device.
  i2c: ocores: turn incomplete kdoc into a comment
  i2c: designware: Do not allow i2c_dw_xfer() calls while suspended
  i2c: tegra: Only display error messages if DMA setup fails
  i2c: gpio: fault-injector: add 'inject_panic' injector
  i2c: gpio: fault-injector: add 'lose_arbitration' injector
  i2c: tegra: remove multi-master support
  i2c: tegra: remove master fifo support on tegra186
  i2c: tegra: change phrasing, "fallbacking" to "falling back"
  i2c: expand minor range when registering chrdev region
  i2c: aspeed: Add multi-master use case support
  i2c: core-smbus: don't trace smbus_reply data on errors
  i2c: ocores: Add support for bus clock via platform data
  i2c: ocores: Add support for IO mapper registers.
  i2c: ocores: checkpatch fixes
  i2c: ocores: add SPDX tag
  i2c: ocores: add polling interface
  i2c: ocores: do not handle IRQ if IF is not set
  i2c: ocores: stop transfer on timeout
  i2c: tegra: add i2c interface timing support
  ...
 2019-03-08 09:27:33 -08:00
Rasmus Villemoes
f1ebe04f5b ACPI: implement acpi_handle_debug in terms of _dynamic_func_call 
With coming changes on x86-64, all dynamic debug descriptors in a
translation unit must have distinct names.  The macro _dynamic_func_call
takes care of that.  No functional change.

Link: http://lkml.kernel.org/r/20190212214150.4807-15-linux@rasmusvillemoes.dk
Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Jason Baron <jbaron@akamai.com>
Cc: David Sterba <dsterba@suse.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Petr Mladek <pmladek@suse.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2019-03-07 18:32:00 -08:00
Rasmus Villemoes
902f99a38b ACPI: remove unused __acpi_handle_debug macro 
If CONFIG_DYNAMIC_DEBUG is not set, acpi_handle_debug directly invokes
acpi_handle_printk (if DEBUG) or does a no-printk (if !DEBUG).  So this
macro is never used.

Link: http://lkml.kernel.org/r/20190212214150.4807-14-linux@rasmusvillemoes.dk
Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Acked-by: Jason Baron <jbaron@akamai.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Cc: David Sterba <dsterba@suse.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Petr Mladek <pmladek@suse.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2019-03-07 18:32:00 -08:00
Rasmus Villemoes
6ad6e54abb ACPI: use proper DYNAMIC_DEBUG_BRANCH macro 
dynamic debug may be implemented via static keys, but ACPI is missing
out on that runtime benefit since it open-codes one possible definition
of DYNAMIC_DEBUG_BRANCH.

Link: http://lkml.kernel.org/r/20190212214150.4807-13-linux@rasmusvillemoes.dk
Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Acked-by: Jason Baron <jbaron@akamai.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Cc: David Sterba <dsterba@suse.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Petr Mladek <pmladek@suse.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2019-03-07 18:32:00 -08:00
Andy Shevchenko
4d1f7a6eab
gpiolib: acpi: Introduce ACPI_GPIO_QUIRK_ONLY_GPIOIO 
New quirk enforces search for GPIO based on its type,
i.e. iterate over GpioIo resources only.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Tested-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
 2019-02-08 17:29:51 +00:00
Andy Shevchenko
b33a02aadc i2c: acpi: Move I2C bits from acpi.h to i2c.h 
As discussed previously the best location for certain bus related bits,
e.g. I2C, is its own realm of the headers.

In order to uncontaminate acpi.h move the I2C bits to i2c.h.

There is no functional change intended.

Link: https://lkml.org/lkml/2018/11/28/744
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
 2019-01-15 23:20:02 +01:00
Dan Williams
8fc5c73554 acpi/nfit, device-dax: Identify differentiated memory with a unique numa-node 
Persistent memory, as described by the ACPI NFIT (NVDIMM Firmware
Interface Table), is the first known instance of a memory range
described by a unique "target" proximity domain. Where "initiator" and
"target" proximity domains is an approach that the ACPI HMAT
(Heterogeneous Memory Attributes Table) uses to described the unique
performance properties of a memory range relative to a given initiator
(e.g. CPU or DMA device).

Currently the numa-node for a /dev/pmemX block-device or /dev/daxX.Y
char-device follows the traditional notion of 'numa-node' where the
attribute conveys the closest online numa-node. That numa-node attribute
is useful for cpu-binding and memory-binding processes *near* the
device. However, when the memory range backing a 'pmem', or 'dax' device
is onlined (memory hot-add) the memory-only-numa-node representing that
address needs to be differentiated from the set of online nodes. In
other words, the numa-node association of the device depends on whether
you can bind processes *near* the cpu-numa-node in the offline
device-case, or bind process *on* the memory-range directly after the
backing address range is onlined.

Allow for the case that platform firmware describes persistent memory
with a unique proximity domain, i.e. when it is distinct from the
proximity of DRAM and CPUs that are on the same socket. Plumb the Linux
numa-node translation of that proximity through the libnvdimm region
device to namespaces that are in device-dax mode. With this in place the
proposed kmem driver [1] can optionally discover a unique numa-node
number for the address range as it transitions the memory from an
offline state managed by a device-driver to an online memory range
managed by the core-mm.

[1]: https://lore.kernel.org/lkml/20181022201317.8558C1D8@viggo.jf.intel.com

Reported-by: Fan Du <fan.du@intel.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: "Oliver O'Halloran" <oohall@gmail.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Jérôme Glisse <jglisse@redhat.com>
Reviewed-by: Yang Shi <yang.shi@linux.alibaba.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
 2019-01-06 21:41:57 -08:00
Linus Torvalds
d8924c0d76 Device properties framework updates for 4.21-rc1 
- Introduce "software nodes", analogous to the DT and ACPI firmware
    nodes except that they can be created by kernel code, in order to
    complement fwnodes representing real firmware nodes when they are
    incomplete (for example missing device properties) and to supply
    the primary fwnode when the firmware lacks hardware description
    for a device completely, and replace the "property_set" struct
    fwnode_handle type with software nodes (Heikki Krogerus).
 
  - Clean up the just introduced software nodes support and fix a commet
    in the graph-handling code (Colin Ian King, Marco Felsch).
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Merge tag 'devprop-4.21-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull device properties framework updates from Rafael Wysocki:
 "This introduces 'software nodes' that are analogous to the DT and ACPI
  firmware nodes except that they can be created by drivers themselves
  and do a couple of assorted cleanups.

  Specifics:

   - Introduce "software nodes", analogous to the DT and ACPI firmware
     nodes except that they can be created by kernel code, in order to
     complement fwnodes representing real firmware nodes when they are
     incomplete (for example missing device properties) and to supply
     the primary fwnode when the firmware lacks hardware description for
     a device completely, and replace the "property_set" struct
     fwnode_handle type with software nodes (Heikki Krogerus).

   - Clean up the just introduced software nodes support and fix a
     commet in the graph-handling code (Colin Ian King, Marco Felsch)"

* tag 'devprop-4.21-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  device property: fix fwnode_graph_get_next_endpoint() documentation
  drivers: base: swnode: remove need for a temporary string for the node name
  device property: Remove struct property_set
  device property: Move device_add_properties() to swnode.c
  drivers: base: Introducing software nodes to the firmware node framework
  ACPI / glue: Add acpi_platform_notify() function
  drivers core: Prepare support for multiple platform notifications
  driver core: platform: Remove duplicated device_remove_properties() call
 2018-12-25 15:01:46 -08:00
Linus Torvalds
e6d1315006 ACPI updates for 4.21-rc1 
- Update the ACPICA code in the kernel to the 20181213 upstream
    revision including:
    * New Windows _OSI strings (Bob Moore, Jung-uk Kim).
    * Buffers-to-string conversions update (Bob Moore).
    * Removal of support for expressions in package elements (Bob
      Moore).
    * New option to display method/object evaluation in debug output
      (Bob Moore).
    * Compiler improvements (Bob Moore, Erik Schmauss).
    * Minor debugger fix (Erik Schmauss).
    * Disassembler improvement (Erik Schmauss).
    * Assorted cleanups (Bob Moore, Colin Ian King, Erik Schmauss).
 
  - Add support for a new OEM _OSI string to indicate special handling
    of secondary graphics adapters on some systems (Alex Hung).
 
  - Make it possible to build the ACPI subystem without PCI support
    (Sinan Kaya).
 
  - Make the SPCR table handling regard baud rate 0 in accordance with
    the specification of it and make the DSDT override code support
    DSDT code names generated by recent ACPICA (Andy Shevchenko, Wang
    Dongsheng, Nathan Chancellor).
 
  - Add clock frequency for Hisilicon Hip08 SPI controller to the ACPI
    driver for AMD SoCs (APD) (Jay Fang).
 
  - Fix the PM handling during device init in the ACPI driver for
    Intel SoCs (LPSS) (Hans de Goede).
 
  - Avoid double panic()s by clearing the APEI GHES block_status
    before panic() (Lenny Szubowicz).
 
  - Clean up a function invocation in the ACPI core and get rid of
    some code duplication by using the DEFINE_SHOW_ATTRIBUTE macro
    in the APEI support code (Alexey Dobriyan, Yangtao Li).
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Merge tag 'acpi-4.21-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull ACPI updates from Rafael Wysocki:
 "These update the ACPICA code in the kernel to the 20181213 upstream
  revision, make it possible to build the ACPI subsystem without PCI
  support, and a new OEM _OSI string, add a new device support to the
  ACPI driver for AMD SoCs and fix PM handling in the ACPI driver for
  Intel SoCs, fix the SPCR table handling and do some assorted fixes and
  cleanups.

  Specifics:

   - Update the ACPICA code in the kernel to the 20181213 upstream
     revision including:
      * New Windows _OSI strings (Bob Moore, Jung-uk Kim).
      * Buffers-to-string conversions update (Bob Moore).
      * Removal of support for expressions in package elements (Bob
        Moore).
      * New option to display method/object evaluation in debug output
        (Bob Moore).
      * Compiler improvements (Bob Moore, Erik Schmauss).
      * Minor debugger fix (Erik Schmauss).
      * Disassembler improvement (Erik Schmauss).
      * Assorted cleanups (Bob Moore, Colin Ian King, Erik Schmauss).

   - Add support for a new OEM _OSI string to indicate special handling
     of secondary graphics adapters on some systems (Alex Hung).

   - Make it possible to build the ACPI subystem without PCI support
     (Sinan Kaya).

   - Make the SPCR table handling regard baud rate 0 in accordance with
     the specification of it and make the DSDT override code support
     DSDT code names generated by recent ACPICA (Andy Shevchenko, Wang
     Dongsheng, Nathan Chancellor).

   - Add clock frequency for Hisilicon Hip08 SPI controller to the ACPI
     driver for AMD SoCs (APD) (Jay Fang).

   - Fix the PM handling during device init in the ACPI driver for Intel
     SoCs (LPSS) (Hans de Goede).

   - Avoid double panic()s by clearing the APEI GHES block_status before
     panic() (Lenny Szubowicz).

   - Clean up a function invocation in the ACPI core and get rid of some
     code duplication by using the DEFINE_SHOW_ATTRIBUTE macro in the
     APEI support code (Alexey Dobriyan, Yangtao Li)"

* tag 'acpi-4.21-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (31 commits)
  ACPI / tables: Add an ifdef around amlcode and dsdt_amlcode
  ACPI/APEI: Clear GHES block_status before panic()
  ACPI: Make PCI slot detection driver depend on PCI
  ACPI/IORT: Stub out ACS functions when CONFIG_PCI is not set
  arm64: select ACPI PCI code only when both features are enabled
  PCI/ACPI: Allow ACPI to be built without CONFIG_PCI set
  ACPICA: Remove PCI bits from ACPICA when CONFIG_PCI is unset
  ACPI: Allow CONFIG_PCI to be unset for reboot
  ACPI: Move PCI reset to a separate function
  ACPI / OSI: Add OEM _OSI string to enable dGPU direct output
  ACPI / tables: add DSDT AmlCode new declaration name support
  ACPICA: Update version to 20181213
  ACPICA: change coding style to match ACPICA, no functional change
  ACPICA: Debug output: Add option to display method/object evaluation
  ACPICA: disassembler: disassemble OEMx tables as AML
  ACPICA: Add "Windows 2018.2" string in the _OSI support
  ACPICA: Expressions in package elements are not supported
  ACPICA: Update buffer-to-string conversions
  ACPICA: add comments, no functional change
  ACPICA: Remove defines that use deprecated flag
  ...
 2018-12-25 14:21:18 -08:00
Rafael J. Wysocki
3eb8536846 Merge branch 'acpi-pci' 
* acpi-pci:
  ACPI: Make PCI slot detection driver depend on PCI
  ACPI/IORT: Stub out ACS functions when CONFIG_PCI is not set
  arm64: select ACPI PCI code only when both features are enabled
  PCI/ACPI: Allow ACPI to be built without CONFIG_PCI set
  ACPICA: Remove PCI bits from ACPICA when CONFIG_PCI is unset
  ACPI: Allow CONFIG_PCI to be unset for reboot
  ACPI: Move PCI reset to a separate function
 2018-12-21 10:04:23 +01:00
Sinan Kaya
5d32a66541 PCI/ACPI: Allow ACPI to be built without CONFIG_PCI set 
We are compiling PCI code today for systems with ACPI and no PCI
device present. Remove the useless code and reduce the tight
dependency.

Signed-off-by: Sinan Kaya <okaya@kernel.org>
Acked-by: Bjorn Helgaas <bhelgaas@google.com> # PCI parts
Acked-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
 2018-12-20 10:19:49 +01:00
Andy Shevchenko
0d5102fe85 i2c: acpi: Introduce i2c_acpi_get_i2c_resource() helper 
Besides current two users one more is coming. Definitely makes sense to
introduce a helper.

No functional change intended.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Wolfram Sang <wsa@the-dreams.de>
 2018-12-03 21:40:02 +02:00
Alexey Dobriyan
f8c6d1402b ACPI: fix acpi_find_child_device() invocation in acpi_preset_companion() 
acpi_find_child_device() accepts boolean not pointer as last argument.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
[ rjw: Subject ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
 2018-11-26 18:33:33 +01:00
Heikki Krogerus
7847a1455f ACPI / glue: Add acpi_platform_notify() function 
Instead of relying on the "platform_notify" callback hook,
introducing separate notification function
acpi_platform_notify() and calling that directly from
drivers core when device entries are added and removed.

Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
 2018-11-26 18:19:11 +01:00