Commit Graph

1188 Commits

Author SHA1 Message Date
Linus Torvalds
71893f1161 Merge branch 'dmi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging
Pull dmi updates from Jean Delvare.

* 'dmi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging:
  firmware: dmi_scan: Use lowercase letters for UUID
  firmware: dmi_scan: Add DMI_OEM_STRING support to dmi_matches
  firmware: dmi_scan: Fix UUID length safety check
2018-04-13 16:32:16 -07:00
Jean Delvare
712ff25450 firmware: dmi_scan: Use lowercase letters for UUID
RFC 4122 asks for letters a-f in UUID to be lowercase. Follow this
recommendation.

Suggested by Paul Dagnelie at:
https://savannah.nongnu.org/bugs/index.php?53569

Signed-off-by: Jean Delvare <jdelvare@suse.de>
2018-04-13 15:37:59 +02:00
Alex Hung
de40614de9 firmware: dmi_scan: Add DMI_OEM_STRING support to dmi_matches
OEM strings are defined by each OEM and they contain customized and
useful OEM information. Supporting it provides more flexible uses of
the dmi_matches function.

Signed-off-by: Alex Hung <alex.hung@canonical.com>
Signed-off-by: Jean Delvare <jdelvare@suse.de>
2018-04-13 15:37:59 +02:00
Jean Delvare
90fe6f8ff0 firmware: dmi_scan: Fix UUID length safety check
The test which ensures that the DMI type 1 structure is long enough
to hold the UUID is off by one. It would fail if the structure is
exactly 24 bytes long, while that's sufficient to hold the UUID.

I don't expect this bug to cause problem in practice because all
implementations I have seen had length 8, 25 or 27 bytes, in line
with the SMBIOS specifications. But let's fix it still.

Signed-off-by: Jean Delvare <jdelvare@suse.de>
Fixes: a814c3597a ("firmware: dmi_scan: Check DMI structure length")
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2018-04-13 15:37:59 +02:00
Linus Torvalds
948869fa9f MIPS changes for 4.17
These are the main MIPS changes for 4.17. Rough overview:
 
  (1) generic platform: Add support for Microsemi Ocelot SoCs
 
  (2) crypto: Add CRC32 and CRC32C HW acceleration module
 
  (3) Various cleanups and misc improvements
 
 Miscellaneous:
 
  - Hang more efficiently on halt/powerdown/restart
 
  - pm-cps: Block system suspend when a JTAG probe is present
 
  - Expand make help text for generic defconfigs
    - Refactor handling of legacy defconfigs
 
  - Determine the entry point from the ELF file header to fix microMIPS
    for certain toolchains
 
  - Introduce isa-rev.h for MIPS_ISA_REV and use to simplify other code
 
 Minor cleanups:
 
  - DTS: boston/ci20: Unit name cleanups and correction
 
  - kdump: Make the default for PHYSICAL_START always 64-bit
 
  - Constify gpio_led in Alchemy, AR7, and TXX9
 
  - Silence a couple of W=1 warnings
 
  - Remove duplicate includes
 
 Platform support:
 
 ath79:
 
  - Fix AR724X_PLL_REG_PCIE_CONFIG offset
 
 BCM47xx:
 
  - FIRMWARE: Use mac_pton() for MAC address parsing
 
  - Add Luxul XAP1500/XWR1750 WiFi LEDs
 
  - Use standard reset button for Luxul XWR-1750
 
 BMIPS:
 
  - Enable CONFIG_BRCMSTB_PM in bmips_stb_defconfig for build coverage
 
  - Add STB PM, wake-up timer, watchdog DT nodes
 
 Generic platform:
 
  - Add support for Microsemi Ocelot
    - dt-bindings: Add vendor prefix for Microsemi Corporation
    - dt-bindings: Add bindings for Microsemi SoCs
    - Add ocelot SoC & PCB123 board DTS files
    - MAINTAINERS: Add entry for Microsemi MIPS SoCs
 
  - Enable crc32-mips on r6 configs
 
 Octeon:
 
  - Drop '.' after newlines in printk calls
 
 ralink:
 
  - pci-mt7621: Enable PCIe on MT7688
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Merge tag 'mips_4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/jhogan/mips

Pull MIPS updates from James Hogan:
 "These are the main MIPS changes for 4.17. Rough overview:

   (1) generic platform: Add support for Microsemi Ocelot SoCs

   (2) crypto: Add CRC32 and CRC32C HW acceleration module

   (3) Various cleanups and misc improvements

  More detailed summary:

  Miscellaneous:
   - hang more efficiently on halt/powerdown/restart
   - pm-cps: Block system suspend when a JTAG probe is present
   - expand make help text for generic defconfigs
   - refactor handling of legacy defconfigs
   - determine the entry point from the ELF file header to fix microMIPS
     for certain toolchains
   - introduce isa-rev.h for MIPS_ISA_REV and use to simplify other code

  Minor cleanups:
   - DTS: boston/ci20: Unit name cleanups and correction
   - kdump: Make the default for PHYSICAL_START always 64-bit
   - constify gpio_led in Alchemy, AR7, and TXX9
   - silence a couple of W=1 warnings
   - remove duplicate includes

  Platform support:
  Generic platform:
   - add support for Microsemi Ocelot
   - dt-bindings: Add vendor prefix for Microsemi Corporation
   - dt-bindings: Add bindings for Microsemi SoCs
   - add ocelot SoC & PCB123 board DTS files
   - MAINTAINERS: Add entry for Microsemi MIPS SoCs
   - enable crc32-mips on r6 configs

  ath79:
   - fix AR724X_PLL_REG_PCIE_CONFIG offset

  BCM47xx:
   - firmware: Use mac_pton() for MAC address parsing
   - add Luxul XAP1500/XWR1750 WiFi LEDs
   - use standard reset button for Luxul XWR-1750

  BMIPS:
   - enable CONFIG_BRCMSTB_PM in bmips_stb_defconfig for build coverage
   - add STB PM, wake-up timer, watchdog DT nodes

  Octeon:
   - drop '.' after newlines in printk calls

  ralink:
   - pci-mt7621: Enable PCIe on MT7688"

* tag 'mips_4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/jhogan/mips: (37 commits)
  MIPS: BCM47XX: Use standard reset button for Luxul XWR-1750
  MIPS: BCM47XX: Add Luxul XAP1500/XWR1750 WiFi LEDs
  MIPS: Make the default for PHYSICAL_START always 64-bit
  MIPS: Use the entry point from the ELF file header
  MAINTAINERS: Add entry for Microsemi MIPS SoCs
  MIPS: generic: Add support for Microsemi Ocelot
  MIPS: mscc: Add ocelot PCB123 device tree
  MIPS: mscc: Add ocelot dtsi
  dt-bindings: mips: Add bindings for Microsemi SoCs
  dt-bindings: Add vendor prefix for Microsemi Corporation
  MIPS: ath79: Fix AR724X_PLL_REG_PCIE_CONFIG offset
  MIPS: pci-mt7620: Enable PCIe on MT7688
  MIPS: pm-cps: Block system suspend when a JTAG probe is present
  MIPS: VDSO: Replace __mips_isa_rev with MIPS_ISA_REV
  MIPS: BPF: Replace __mips_isa_rev with MIPS_ISA_REV
  MIPS: cpu-features.h: Replace __mips_isa_rev with MIPS_ISA_REV
  MIPS: Introduce isa-rev.h to define MIPS_ISA_REV
  MIPS: Hang more efficiently on halt/powerdown/restart
  FIRMWARE: bcm47xx_nvram: Replace mac address parsing
  MIPS: BMIPS: Add Broadcom STB watchdog nodes
  ...
2018-04-10 11:39:22 -07:00
Linus Torvalds
016c6f25d1 fw_cfg, vhost: features fixes
This cleans up the qemu fw cfg device driver.
 On top of this, vmcore is dumped there on crash to
 help debugging witH kASLR enabled.
 Also included are some fixes in vhost.
 
 Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost

Pull fw_cfg, vhost updates from Michael Tsirkin:
 "This cleans up the qemu fw cfg device driver.

  On top of this, vmcore is dumped there on crash to help debugging
  with kASLR enabled.

  Also included are some fixes in vhost"

* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost:
  vhost: add vsock compat ioctl
  vhost: fix vhost ioctl signature to build with clang
  fw_cfg: write vmcoreinfo details
  crash: export paddr_vmcoreinfo_note()
  fw_cfg: add DMA register
  fw_cfg: add a public uapi header
  fw_cfg: handle fw_cfg_read_blob() error
  fw_cfg: remove inline from fw_cfg_read_blob()
  fw_cfg: fix sparse warnings around FW_CFG_FILE_DIR read
  fw_cfg: fix sparse warning reading FW_CFG_ID
  fw_cfg: fix sparse warnings with fw_cfg_file
  fw_cfg: fix sparse warnings in fw_cfg_sel_endianness()
  ptr_ring: fix build
2018-04-06 19:21:41 -07:00
Linus Torvalds
38c23685b2 ARM: SoC driver updates for 4.17
The main addition this time around is the new ARM "SCMI" framework,
 which is the latest in a series of standards coming from ARM to do power
 management in a platform independent way. This has been through many
 review cycles, and it relies on a rather interesting way of using the
 mailbox subsystem, but in the end I agreed that Sudeep's version was
 the best we could do after all.
 
 Other changes include:
 
 - the ARM CCN driver is moved out of drivers/bus into drivers/perf,
   which makes more sense. Similarly, the performance monitoring
   portion of the CCI driver are moved the same way and cleaned up
   a little more.
 
 - a series of updates to the SCPI framework
 
 - support for the Mediatek mt7623a SoC in drivers/soc
 
 - support for additional NVIDIA Tegra hardware in drivers/soc
 
 - a new reset driver for Socionext Uniphier
 
 - lesser bug fixes in drivers/soc, drivers/tee, drivers/memory, and
   drivers/firmware and drivers/reset across platforms
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Merge tag 'armsoc-drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull ARM SoC driver updates from Arnd Bergmann:
 "The main addition this time around is the new ARM "SCMI" framework,
  which is the latest in a series of standards coming from ARM to do
  power management in a platform independent way.

  This has been through many review cycles, and it relies on a rather
  interesting way of using the mailbox subsystem, but in the end I
  agreed that Sudeep's version was the best we could do after all.

  Other changes include:

   - the ARM CCN driver is moved out of drivers/bus into drivers/perf,
     which makes more sense. Similarly, the performance monitoring
     portion of the CCI driver are moved the same way and cleaned up a
     little more.

   - a series of updates to the SCPI framework

   - support for the Mediatek mt7623a SoC in drivers/soc

   - support for additional NVIDIA Tegra hardware in drivers/soc

   - a new reset driver for Socionext Uniphier

   - lesser bug fixes in drivers/soc, drivers/tee, drivers/memory, and
     drivers/firmware and drivers/reset across platforms"

* tag 'armsoc-drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (87 commits)
  reset: uniphier: add ethernet reset control support for PXs3
  reset: stm32mp1: Enable stm32mp1 reset driver
  dt-bindings: reset: add STM32MP1 resets
  reset: uniphier: add Pro4/Pro5/PXs2 audio systems reset control
  reset: imx7: add 'depends on HAS_IOMEM' to fix unmet dependency
  reset: modify the way reset lookup works for board files
  reset: add support for non-DT systems
  clk: scmi: use devm_of_clk_add_hw_provider() API and drop scmi_clocks_remove
  firmware: arm_scmi: prevent accessing rate_discrete uninitialized
  hwmon: (scmi) return -EINVAL when sensor information is unavailable
  amlogic: meson-gx-socinfo: Update soc ids
  soc/tegra: pmc: Use the new reset APIs to manage reset controllers
  soc: mediatek: update power domain data of MT2712
  dt-bindings: soc: update MT2712 power dt-bindings
  cpufreq: scmi: add thermal dependency
  soc: mediatek: fix the mistaken pointer accessed when subdomains are added
  soc: mediatek: add SCPSYS power domain driver for MediaTek MT7623A SoC
  soc: mediatek: avoid hardcoded value with bus_prot_mask
  dt-bindings: soc: add header files required for MT7623A SCPSYS dt-binding
  dt-bindings: soc: add SCPSYS binding for MT7623 and MT7623A SoC
  ...
2018-04-05 21:29:35 -07:00
Linus Torvalds
dd972f924d * Add NVDIMM support to EDAC (Tony Luck)
* misc fixes
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Merge tag 'edac_for_4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp

Pull EDAC updates from Borislav Petkov:
 "Noteworthy is the NVDIMM support:

   - NVDIMM support to EDAC (Tony Luck)

   - misc fixes"

* tag 'edac_for_4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp:
  EDAC, sb_edac: Remove variable length array usage
  EDAC, skx_edac: Detect non-volatile DIMMs
  firmware, DMI: Add function to look up a handle and return DIMM size
  acpi, nfit: Add function to look up nvdimm device and provide SMBIOS handle
  EDAC: Add new memory type for non-volatile DIMMs
  EDAC: Drop duplicated array of strings for memory type names
  EDAC, layerscape: Allow building for LS1021A
2018-04-05 14:21:13 -07:00
Linus Torvalds
672a9c1069 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
Pull trivial tree updates from Jiri Kosina.

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial:
  kfifo: fix inaccurate comment
  tools/thermal: tmon: fix for segfault
  net: Spelling s/stucture/structure/
  edd: don't spam log if no EDD information is present
  Documentation: Fix early-microcode.txt references after file rename
  tracing: Block comments should align the * on each line
  treewide: Fix typos in printk
  GenWQE: Fix a typo in two comments
  treewide: Align function definition open/close braces
2018-04-05 11:56:35 -07:00
Linus Torvalds
bc16d4052f Merge branch 'efi-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull EFI updates from Ingo Molnar:
 "The main EFI changes in this cycle were:

   - Fix the apple-properties code (Andy Shevchenko)

   - Add WARN() on arm64 if UEFI Runtime Services corrupt the reserved
     x18 register (Ard Biesheuvel)

   - Use efi_switch_mm() on x86 instead of manipulating %cr3 directly
     (Sai Praneeth)

   - Fix early memremap leak in ESRT code (Ard Biesheuvel)

   - Switch to L"xxx" notation for wide string literals (Ard Biesheuvel)

   - ... plus misc other cleanups and bugfixes"

* 'efi-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/efi: Use efi_switch_mm() rather than manually twiddling with %cr3
  x86/efi: Replace efi_pgd with efi_mm.pgd
  efi: Use string literals for efi_char16_t variable initializers
  efi/esrt: Fix handling of early ESRT table mapping
  efi: Use efi_mm in x86 as well as ARM
  efi: Make const array 'apple' static
  efi/apple-properties: Use memremap() instead of ioremap()
  efi: Reorder pr_notice() with add_device_randomness() call
  x86/efi: Replace GFP_ATOMIC with GFP_KERNEL in efi_query_variable_store()
  efi/arm64: Check whether x18 is preserved by runtime services calls
  efi/arm*: Stop printing addresses of virtual mappings
  efi/apple-properties: Remove redundant attribute initialization from unmarshal_key_value_pairs()
  efi/arm*: Only register page tables when they exist
2018-04-02 17:46:37 -07:00
Linus Torvalds
cea061e455 Merge branch 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 platform updates from Ingo Molnar:
 "The main changes in this cycle were:

   - Add "Jailhouse" hypervisor support (Jan Kiszka)

   - Update DeviceTree support (Ivan Gorinov)

   - Improve DMI date handling (Andy Shevchenko)"

* 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/PCI: Fix a potential regression when using dmi_get_bios_year()
  firmware/dmi_scan: Uninline dmi_get_bios_year() helper
  x86/devicetree: Use CPU description from Device Tree
  of/Documentation: Specify local APIC ID in "reg"
  MAINTAINERS: Add entry for Jailhouse
  x86/jailhouse: Allow to use PCI_MMCONFIG without ACPI
  x86: Consolidate PCI_MMCONFIG configs
  x86: Align x86_64 PCI_MMCONFIG with 32-bit variant
  x86/jailhouse: Enable PCI mmconfig access in inmates
  PCI: Scan all functions when running over Jailhouse
  jailhouse: Provide detection for non-x86 systems
  x86/devicetree: Fix device IRQ settings in DT
  x86/devicetree: Initialize device tree before using it
  pci: Simplify code by using the new dmi_get_bios_year() helper
  ACPI/sleep: Simplify code by using the new dmi_get_bios_year() helper
  x86/pci: Simplify code by using the new dmi_get_bios_year() helper
  dmi: Introduce the dmi_get_bios_year() helper function
  x86/platform/quark: Re-use DEFINE_SHOW_ATTRIBUTE() macro
  x86/platform/atom: Re-use DEFINE_SHOW_ATTRIBUTE() macro
2018-04-02 16:15:32 -07:00
Arnd Bergmann
f8d6dc78b8 ARM SCMI fixes/cleanups for v4.17
Couple of fixes for build warning due to uninitialised variable
 and static checker warning for passing NULL pointer to PTR_ERR.
 It also contains cleanup suggested by Stephen Boyd in SCMI clock
 driver using the new devm_of_clk_add_hw_provider() API.
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Merge tag 'scmi-fixes-4.17' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/sudeep.holla/linux into next/drivers

Pull "ARM SCMI fixes/cleanups for v4.17" from Sudeep Holla:

Couple of fixes for build warning due to uninitialised variable
and static checker warning for passing NULL pointer to PTR_ERR.
It also contains cleanup suggested by Stephen Boyd in SCMI clock
driver using the new devm_of_clk_add_hw_provider() API.

* tag 'scmi-fixes-4.17' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/sudeep.holla/linux:
  clk: scmi: use devm_of_clk_add_hw_provider() API and drop scmi_clocks_remove
  firmware: arm_scmi: prevent accessing rate_discrete uninitialized
  hwmon: (scmi) return -EINVAL when sensor information is unavailable
2018-03-27 15:57:19 +02:00
Arnd Bergmann
3262b82d0c Amlogic driver updates for v4.17
- socinfo: add more IDs for newer SoC detection
 - firmware: update init to use module_platform_driver_probe
 - soc: mix. VPU power controller fixes
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Merge tag 'amlogic-drivers' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/khilman/linux-amlogic into next/drivers

Pull "Amlogic driver updates for v4.17" from Kevin Hilman:

- socinfo: add more IDs for newer SoC detection
- firmware: update init to use module_platform_driver_probe
- soc: mix. VPU power controller fixes

* tag 'amlogic-drivers' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/khilman/linux-amlogic:
  amlogic: meson-gx-socinfo: Update soc ids
  firmware: meson-sm: rework meson_sm_init to use module_platform_driver_probe
  meson-gx-socinfo: make local function meson_gx_socinfo_init static
  meson-mx-socinfo: Make local function meson_mx_socinfo_init() static
  soc: amlogic: meson-gx-pwrc-vpu: fix error on shutdown when domain is powered off
  soc: amlogic: meson-gx-pwrc-vpu: don't print error message on probe deferral
2018-03-27 15:54:23 +02:00
Arnd Bergmann
d0994465d0 firmware: Changes for v4.17-rc1
These changes are rather small, with just a fix for a return value check
 and some preparatory work for Tegra194 BPMP support.
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Merge tag 'tegra-for-4.17-firmware' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/tegra/linux into next/drivers

Pull "firmware: Changes for v4.17-rc1" from Thierry Reding:

These changes are rather small, with just a fix for a return value check
and some preparatory work for Tegra194 BPMP support.

* tag 'tegra-for-4.17-firmware' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/tegra/linux:
  firmware: tegra: adjust tested variable
  firmware: tegra: Simplify channel management
2018-03-27 15:50:57 +02:00
Andy Shevchenko
3af3452586 firmware/dmi_scan: Uninline dmi_get_bios_year() helper
Uninline dmi_get_bios_year() which, in particular, allows us
to optimize it in the future.

While doing this, convert the function to return an error code
when BIOS date is not present or not parsable, or CONFIG_DMI=n.

Additionally, during the move, add a bit of documentation.

Suggested-by: Bjorn Helgaas <helgaas@kernel.org>
Suggested-by: Rafael J. Wysocki <rafael@kernel.org>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Jean Delvare <jdelvare@suse.de>
Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Lukas Wunner <lukas@wunner.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rafael J . Wysocki <rjw@rjwysocki.net>
Cc: linux-acpi@vger.kernel.org
Cc: linux-pci@vger.kernel.org
Fixes: 492a1abd61 ("dmi: Introduce the dmi_get_bios_year() helper function")
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2018-03-27 11:33:15 +02:00
Johannes Thumshirn
bade9835a2 edd: don't spam log if no EDD information is present
We've had reports from users being concerned about messages like:

  [    4.487246] BIOS EDD facility v0.16 2004-Jun-25, 0 devices found
  [    4.487251] EDD information not available.

While these are more or less irrelevant, tell edd.c to not annoy anyone.

Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2018-03-27 09:51:23 +02:00
Anders Roxell
b5e817dcdd firmware: arm_scmi: prevent accessing rate_discrete uninitialized
gcc-5.3 and earlier warns that rate_discrete maybe-uninitialized
    ../drivers/firmware/arm_scmi/clock.c:185:5: warning: 'rate_discrete'
        may be used uninitialized in this function [-Wmaybe-uninitialized]
      if (rate_discrete)
         ^
    ../drivers/firmware/arm_scmi/clock.c:128:7: note:
        'rate_discrete' was declared here
      bool rate_discrete;
           ^
This patch fixing the warning by initialising rate_discrete and also using
goto label for the error path.

Fixes: 5f6c6430e9 ("firmware: arm_scmi: add initial support for clock protocol")
Suggested-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Anders Roxell <anders.roxell@linaro.org>
[sudeep.holla: added one line description to the commit message]
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
2018-03-20 12:20:27 +00:00
Marc-André Lureau
2d6d60a3d3 fw_cfg: write vmcoreinfo details
If the "etc/vmcoreinfo" fw_cfg file is present and we are not running
the kdump kernel, write the addr/size of the vmcoreinfo ELF note.

The DMA operation is expected to run synchronously with today qemu,
but the specification states that it may become async, so we run
"control" field check in a loop for eventual changes.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2018-03-20 03:17:41 +02:00
Marc-André Lureau
14d1824c76 fw_cfg: add DMA register
Add an optional <dma_off> kernel module (or command line) parameter
using the following syntax:

      [qemu_fw_cfg.]ioport=<size>@<base>[:<ctrl_off>:<data_off>[:<dma_off>]]
 or
      [qemu_fw_cfg.]mmio=<size>@<base>[:<ctrl_off>:<data_off>[:<dma_off>]]

and initializes the register address using given or default offset.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Gabriel Somlo <somlo@cmu.edu>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2018-03-20 03:17:40 +02:00
Marc-André Lureau
1f57bc12d8 fw_cfg: add a public uapi header
Create a common header file for well-known values and structures to be
shared by the Linux kernel with qemu or other projects.

It is based from qemu/docs/specs/fw_cfg.txt which references
qemu/include/hw/nvram/fw_cfg_keys.h "for the most up-to-date and
authoritative list" & vmcoreinfo.txt. Those files don't have an
explicit license, but qemu/hw/nvram/fw_cfg.c is BSD-license, so
Michael S. Tsirkin suggested to use the same license.

The patch intentionally left out DMA & vmcoreinfo structures &
defines, which are added in the commits making usage of it.

Suggested-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2018-03-20 03:17:40 +02:00
Marc-André Lureau
b1cc4097d1 fw_cfg: handle fw_cfg_read_blob() error
fw_cfg_read_blob() may fail, but does not return error. This may lead
to surprising behaviours, like populating zero file entries (in
register_file() or during read). Return an error if ACPI locking
failed. Also, the following DMA read/write extension will add more
error paths that should be handled appropriately.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2018-03-20 03:17:39 +02:00
Marc-André Lureau
59ecab182f fw_cfg: remove inline from fw_cfg_read_blob()
The function is not small and getting bigger.

Let the compiler decide instead. No profiling done, hopefully
unnecessary.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2018-03-20 03:17:39 +02:00
Marc-André Lureau
3d47a34ba6 fw_cfg: fix sparse warnings around FW_CFG_FILE_DIR read
Use struct fw_cfg_files to read the directory size, fixing the sparse
warnings:

drivers/firmware/qemu_fw_cfg.c:485:17: warning: cast to restricted __be32

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2018-03-20 03:17:39 +02:00
Marc-André Lureau
f295c8dba7 fw_cfg: fix sparse warning reading FW_CFG_ID
Use a restricted type for reading FW_CFG_ID, fixing sparse warning:

drivers/firmware/qemu_fw_cfg.c:540:22: warning: cast to restricted __le32

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2018-03-20 03:17:38 +02:00
Marc-André Lureau
d174ea7d38 fw_cfg: fix sparse warnings with fw_cfg_file
Modify fw_cfg_sysfs_entry to store entry values, instead of reusing
the restricted types.

Fixes warnings such as:

$ make C=1 CF=-D__CHECK_ENDIAN__ drivers/firmware/qemu_fw_cfg.o

drivers/firmware/qemu_fw_cfg.c:491:29: warning: incorrect type in assignment (different base types)
drivers/firmware/qemu_fw_cfg.c:491:29:    expected restricted __be32 [usertype] size
drivers/firmware/qemu_fw_cfg.c:491:29:    got unsigned int
drivers/firmware/qemu_fw_cfg.c:492:31: warning: incorrect type in assignment (different base types)
drivers/firmware/qemu_fw_cfg.c:492:31:    expected restricted __be16 [usertype] select
drivers/firmware/qemu_fw_cfg.c:492:31:    got int

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2018-03-20 03:17:38 +02:00
Marc-André Lureau
8d59d5bd8f fw_cfg: fix sparse warnings in fw_cfg_sel_endianness()
Dispatch to the appropriate iowrite() instead of casting restricted
type to u16.

- if fw_cfg_is_mmio:
  before: iowrite16(cpu_to_be16(key))
  after: iowrite16be(key)
- if !fw_cfg_is_mmio:
  before: iowrite16(cpu_to_le16(key))
  after: iowrite16(key)
  which is equivalent on little-endian systems, where fw_cfg IO is supported.

Fixes:
$ make C=1 CF=-D__CHECK_ENDIAN__ drivers/firmware/qemu_fw_cfg.o

drivers/firmware/qemu_fw_cfg.c:55:33: warning: restricted __be16 degrades to integer
drivers/firmware/qemu_fw_cfg.c:55:52: warning: restricted __le16 degrades to integer

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2018-03-20 03:17:37 +02:00
Linus Torvalds
23fe85ae4f Merge branch 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull EFI fix from Thomas Gleixner:
 "A single fix to prevent partially initialized pointers in mixed mode
  (64bit kernel on 32bit UEFI)"

* 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  efi/libstub/tpm: Initialize pointer variables to zero for mixed mode
2018-03-18 11:56:53 -07:00
Darren Hart (VMware)
49368c1321 platform/x86: Fix dell driver init order
Update the initcall ordering to satisfy the following dependency
ordering:

1. DCDBAS, ACPI_WMI
2. DELL_SMBIOS, DELL_RBTN
3. DELL_LAPTOP, DELL_WMI

By assigning them to the following initcall levels:

subsys_initcall: DCDBAS, ACPI_WMI
module_init: DELL_SMBIOS, DELL_RBTN
late_initcall: DELL_LAPTOP, DELL_WMI

Cc: Dominik Brodowski <linux@dominikbrodowski.net>
Cc: Mario.Limonciello@dell.com
Signed-off-by: Darren Hart (VMware) <dvhart@infradead.org>
2018-03-14 11:05:53 -07:00
Tony Luck
6deae96b42 firmware, DMI: Add function to look up a handle and return DIMM size
When we first scan the SMBIOS table, save the size of the DIMM.

Provide a function for other code (EDAC driver) to look up the size
of a DIMM from its SMBIOS handle.

Reviewed-by: Jean Delvare <jdelvare@suse.de>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Cc: Aristeu Rozanski <aris@redhat.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Len Brown <lenb@kernel.org>
Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
Cc: Qiuxu Zhuo <qiuxu.zhuo@intel.com>
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Cc: linux-acpi@vger.kernel.org
Cc: linux-nvdimm@lists.01.org
Link: http://lkml.kernel.org/r/20180312182430.10335-5-tony.luck@intel.com
Signed-off-by: Borislav Petkov <bp@suse.de>
2018-03-14 12:49:53 +01:00
Ard Biesheuvel
79832f0b5f efi/libstub/tpm: Initialize pointer variables to zero for mixed mode
As reported by Jeremy Cline, running the new TPM libstub code in mixed
mode (i.e., 64-bit kernel on 32-bit UEFI) results in hangs when invoking
the TCG2 protocol, or when accessing the log_tbl pool allocation.

The reason turns out to be that in both cases, the 64-bit pointer
variables are not fully initialized by the 32-bit EFI code, and so
we should take care to zero initialize these variables beforehand,
or we'll end up dereferencing bogus pointers.

Reported-by: Jeremy Cline <jeremy@jcline.org>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: hdegoede@redhat.com
Cc: jarkko.sakkinen@linux.intel.com
Cc: javierm@redhat.com
Cc: linux-efi@vger.kernel.org
Cc: tweek@google.com
Link: http://lkml.kernel.org/r/20180313140922.17266-2-ard.biesheuvel@linaro.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2018-03-13 15:28:29 +01:00
Ard Biesheuvel
36b649760e efi: Use string literals for efi_char16_t variable initializers
Now that we unambiguously build the entire kernel with -fshort-wchar,
it is no longer necessary to open code efi_char16_t[] initializers as
arrays of characters, and we can move to the L"xxx" notation instead.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Lukas Wunner <lukas@wunner.de>
Cc: Matt Fleming <matt@codeblueprint.co.uk>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-efi@vger.kernel.org
Link: http://lkml.kernel.org/r/20180312084500.10764-6-ard.biesheuvel@linaro.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2018-03-12 10:05:02 +01:00
Ard Biesheuvel
136d5d57e3 efi/esrt: Fix handling of early ESRT table mapping
As reported by Tyler, efi_esrt_init() will return without releasing the
ESRT table header mapping if it encounters a table with an unexpected
version. Replacing the 'return' with 'goto err_memunmap' would fix this
particular occurrence, but, as it turns out, the code is rather peculiar
to begin with:

 - it never uses the header mapping after memcpy()'ing out its contents,
 - it maps and unmaps the entire table without ever looking at the
   contents.

So let's refactor this code to unmap the table header right after the
memcpy() so we can get rid of the error handling path altogether, and
drop the second mapping entirely.

Reported-by: Tyler Baicar <tbaicar@codeaurora.org>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Matt Fleming <matt@codeblueprint.co.uk>
Cc: Peter Jones <pjones@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-efi@vger.kernel.org
Link: http://lkml.kernel.org/r/20180312084500.10764-5-ard.biesheuvel@linaro.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2018-03-12 10:05:01 +01:00
Sai Praneeth
7e904a91bf efi: Use efi_mm in x86 as well as ARM
Presently, only ARM uses mm_struct to manage EFI page tables and EFI
runtime region mappings. As this is the preferred approach, let's make
this data structure common across architectures. Specially, for x86,
using this data structure improves code maintainability and readability.

Tested-by: Bhupesh Sharma <bhsharma@redhat.com>
[ardb: don't #include the world to get a declaration of struct mm_struct]
Signed-off-by: Sai Praneeth Prakhya <sai.praneeth.prakhya@intel.com>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Matt Fleming <matt@codeblueprint.co.uk>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Lee, Chun-Yi <jlee@suse.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Michael S. Tsirkin <mst@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Shankar <ravi.v.shankar@intel.com>
Cc: Ricardo Neri <ricardo.neri@intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tony Luck <tony.luck@intel.com>
Cc: linux-efi@vger.kernel.org
Link: http://lkml.kernel.org/r/20180312084500.10764-2-ard.biesheuvel@linaro.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2018-03-12 10:05:01 +01:00
Andy Shevchenko
4d73b73ff7
FIRMWARE: bcm47xx_nvram: Replace mac address parsing
Replace sscanf() with mac_pton().

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Hauke Mehrtens <hauke@hauke-m.de>
Cc: David S. Miller <davem@davemloft.net>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/17982/
Signed-off-by: James Hogan <jhogan@kernel.org>
2018-03-09 11:22:21 +00:00
Andy Shevchenko
44612d7e0c efi/apple-properties: Use memremap() instead of ioremap()
The memory we are accessing through virtual address has no IO side
effects. Moreover, for IO memory we have to use special accessors,
which we don't use.

Due to above, convert the driver to use memremap() instead of ioremap().

Tested-by: Lukas Wunner <lukas@wunner.de>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Matt Fleming <matt@codeblueprint.co.uk>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-efi@vger.kernel.org
Link: http://lkml.kernel.org/r/20180308080020.22828-12-ard.biesheuvel@linaro.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2018-03-09 08:58:23 +01:00
Ard Biesheuvel
5b4e4c3aa2 efi: Reorder pr_notice() with add_device_randomness() call
Currently, when we receive a random seed from the EFI stub, we call
add_device_randomness() to incorporate it into the entropy pool, and
issue a pr_notice() saying we are about to do that, e.g.,

  [    0.000000] efi:  RNG=0x87ff92cf18
  [    0.000000] random: fast init done
  [    0.000000] efi: seeding entropy pool

Let's reorder those calls to make the output look less confusing:

  [    0.000000] efi: seeding entropy pool
  [    0.000000] efi:  RNG=0x87ff92cf18
  [    0.000000] random: fast init done

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Matt Fleming <matt@codeblueprint.co.uk>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-efi@vger.kernel.org
Link: http://lkml.kernel.org/r/20180308080020.22828-11-ard.biesheuvel@linaro.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2018-03-09 08:58:23 +01:00
Ard Biesheuvel
1832e64162 efi/arm*: Stop printing addresses of virtual mappings
With the recent %p -> %px changes, we now get something like this in
the kernel boot log on ARM/arm64 EFI systems:

     Remapping and enabling EFI services.
       EFI remap 0x00000087fb830000 =>         (ptrval)
       EFI remap 0x00000087fbdb0000 =>         (ptrval)
       EFI remap 0x00000087fffc0000 =>         (ptrval)

The physical addresses of the UEFI runtime regions will also be
printed when booting with the efi=debug command line option, and the
virtual addresses can be inspected via /sys/kernel/debug/efi_page_tables
(if enabled).

So let's just remove the lines above.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Acked-by: Leif Lindholm <leif.lindholm@linaro.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Matt Fleming <matt@codeblueprint.co.uk>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-efi@vger.kernel.org
Link: http://lkml.kernel.org/r/20180308080020.22828-4-ard.biesheuvel@linaro.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2018-03-09 08:58:22 +01:00
Andy Shevchenko
6e98503dba efi/apple-properties: Remove redundant attribute initialization from unmarshal_key_value_pairs()
There is no need to artificially supply a property length and fake data
if property has type of boolean.

Remove redundant piece of data and code.

Reviewed-and-tested-by: Lukas Wunner <lukas@wunner.de>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Matt Fleming <matt@codeblueprint.co.uk>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-efi@vger.kernel.org
Link: http://lkml.kernel.org/r/20180308080020.22828-3-ard.biesheuvel@linaro.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2018-03-09 08:58:21 +01:00
Mark Rutland
6b31a2fa1e efi/arm*: Only register page tables when they exist
Currently the arm/arm64 runtime code registers the runtime servies
pagetables with ptdump regardless of whether runtime services page
tables have been created.

As efi_mm.pgd is NULL in these cases, attempting to dump the efi page
tables results in a NULL pointer dereference in the ptdump code:

/sys/kernel/debug# cat efi_page_tables
[  479.522600] Unable to handle kernel NULL pointer dereference at virtual address 00000000
[  479.522715] Mem abort info:
[  479.522764]   ESR = 0x96000006
[  479.522850]   Exception class = DABT (current EL), IL = 32 bits
[  479.522899]   SET = 0, FnV = 0
[  479.522937]   EA = 0, S1PTW = 0
[  479.528200] Data abort info:
[  479.528230]   ISV = 0, ISS = 0x00000006
[  479.528317]   CM = 0, WnR = 0
[  479.528317] user pgtable: 4k pages, 48-bit VAs, pgd = 0000000064ab0cb0
[  479.528449] [0000000000000000] *pgd=00000000fbbe4003, *pud=00000000fb66e003, *pmd=0000000000000000
[  479.528600] Internal error: Oops: 96000006 [#1] PREEMPT SMP
[  479.528664] Modules linked in:
[  479.528699] CPU: 0 PID: 2457 Comm: cat Not tainted 4.15.0-rc3-00065-g2ad2ee7ecb5c-dirty #7
[  479.528799] Hardware name: FVP Base (DT)
[  479.528899] pstate: 00400009 (nzcv daif +PAN -UAO)
[  479.528941] pc : walk_pgd.isra.1+0x20/0x1d0
[  479.529011] lr : ptdump_walk_pgd+0x30/0x50
[  479.529105] sp : ffff00000bf4bc20
[  479.529185] x29: ffff00000bf4bc20 x28: 0000ffff9d22e000
[  479.529271] x27: 0000000000020000 x26: ffff80007b4c63c0
[  479.529358] x25: 00000000014000c0 x24: ffff80007c098900
[  479.529445] x23: ffff00000bf4beb8 x22: 0000000000000000
[  479.529532] x21: ffff00000bf4bd70 x20: 0000000000000001
[  479.529618] x19: ffff00000bf4bcb0 x18: 0000000000000000
[  479.529760] x17: 000000000041a1c8 x16: ffff0000082139d8
[  479.529800] x15: 0000ffff9d3c6030 x14: 0000ffff9d2527f4
[  479.529924] x13: 00000000000003f3 x12: 0000000000000038
[  479.530000] x11: 0000000000000003 x10: 0101010101010101
[  479.530099] x9 : 0000000017e94050 x8 : 000000000000003f
[  479.530226] x7 : 0000000000000000 x6 : 0000000000000000
[  479.530313] x5 : 0000000000000001 x4 : 0000000000000000
[  479.530416] x3 : ffff000009069fd8 x2 : 0000000000000000
[  479.530500] x1 : 0000000000000000 x0 : 0000000000000000
[  479.530599] Process cat (pid: 2457, stack limit = 0x000000005d1b0e6f)
[  479.530660] Call trace:
[  479.530746]  walk_pgd.isra.1+0x20/0x1d0
[  479.530833]  ptdump_walk_pgd+0x30/0x50
[  479.530907]  ptdump_show+0x10/0x20
[  479.530920]  seq_read+0xc8/0x470
[  479.531023]  full_proxy_read+0x60/0x90
[  479.531100]  __vfs_read+0x18/0x100
[  479.531180]  vfs_read+0x88/0x160
[  479.531267]  SyS_read+0x48/0xb0
[  479.531299]  el0_svc_naked+0x20/0x24
[  479.531400] Code: 91400420 f90033a0 a90707a2 f9403fa0 (f9400000)
[  479.531499] ---[ end trace bfe8e28d8acb2b67 ]---
Segmentation fault

Let's avoid this problem by only registering the tables after their
successful creation, which is also less confusing when EFI runtime
services are not in use.

Reported-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Acked-by: Will Deacon <will.deacon@arm.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Matt Fleming <matt@codeblueprint.co.uk>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-efi@vger.kernel.org
Link: http://lkml.kernel.org/r/20180308080020.22828-2-ard.biesheuvel@linaro.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2018-03-09 08:58:21 +01:00
Julia Lawall
1320f76897 firmware: tegra: adjust tested variable
Check the variable that was most recently initialized.

The semantic match that finds this problem is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@@
expression x, y, f, g, e, m;
statement S1,S2,S3,S4;
@@

x = f(...);
if (\(<+...x...+>\&e\)) S1 else S2
(
x = g(...);
|
m = g(...,&x,...);
|
y = g(...);
*if (e)
 S3 else S4
)
// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Reviewed-by: Mikko Perttunen <mperttunen@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
2018-03-08 14:43:13 +01:00
Mikko Perttunen
1abb081e41 firmware: tegra: Simplify channel management
The Tegra194 BPMP only implements 5 channels (4 to BPMP, 1 to CCPLEX),
and they are not placed contiguously in memory. The current channel
management in the BPMP driver does not support this.

Simplify and refactor the channel management such that only one atomic
transmit channel and one receive channel are supported, and channels
are not required to be placed contiguously in memory. The same
configuration also works on T186 so we end up with less code.

Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
2018-03-08 14:20:58 +01:00
Sudeep Holla
e0270c8089 firmware: meson-sm: rework meson_sm_init to use module_platform_driver_probe
Commit 3aa0582fdb ("of: platform: populate /firmware/ node from
of_platform_default_populate_init()") takes care of populating
all the devices under the /firmware/ node in of_platform_default_populate_init()

This patch reworks meson_sm_init to use module_platform_driver_probe as
the platform device is populated.

Cc: Carlo Caione <carlo@caione.org>
Cc: Kevin Hilman <khilman@baylibre.com>
Cc: linux-amlogic@lists.infradead.org
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>
2018-03-07 17:33:52 -08:00
Arnd Bergmann
f46f11dc1e ARM SCMI support for v4.17
ARM System Control and Management Interface(SCMI)[1] is more flexible and
 easily extensible than any of the existing interfaces.
 
 Few existing as well as future ARM platforms provide micro-controllers
 to abstract various power and other system management tasks which have
 similar interfaces, both in terms of the functions that are provided by
 them, and in terms of how requests are communicated to them.
 
 There are quite a few protocols like ARM SCPI, TI SCI, QCOM RPM, Nvidia Tegra
 BPMP, and so on already. This specification is to standardize and avoid any
 further fragmentation in the design of such interface by various vendors.
 
 The current SCMI driver implementation is very basic and initial support.
 It lacks support for notifications, asynchronous/delayed response, perf/power
 statistics region and sensor register region.
 
 Mailbox is the only form of transport supported currently in the driver.
 SCMI supports interrupt based mailbox communication, where, on completion
 of the processing of a message, the caller receives an interrupt as well as
 polling for completion.
 
 SCMI is designed to minimize the dependency on the mailbox/transport
 hardware. So in terms of SCMI, each channel in the mailbox includes
 memory area, doorbell and completion interrupt.
 
 However the doorbell and completion interrupt is highly mailbox dependent
 which was bit of controversial as part of SCMI/mailbox discussions.
 
 Arnd and me discussed about the few aspects of SCMI and the mailbox framework:
 
 1. Use of mailbox framework for doorbell type mailbox controller:
    - Such hardware may not require any data to be sent to signal the remote
      about the presence of a message. The channel will have in-built
      information on how to trigger the signal to the remote.
      There are few mailbox controller drivers which are purely doorbell based.
      e.g.QCOM IPC, STM, Tegra, ACPI PCC,..etc
 
 2. Supporting other mailbox controller:
    - SCMI just needs a mechanism to signal the remote firmware. Such
      controller may need fixed message to be sent to trigger a doorbell.
      In such case we may need to get that data from DT and pass the same
      to the controller. It's not covered in the current DT binding, but
      can be extended as optional property in future.
 
      However handling notifications may be interesting on such mailbox, but
      again there is no way to interpret what the data field(remote message)
      means, it could be a bit mask or a number or don't-care.
 
 Arnd mentioned that he doesn't like the way the mailbox binding deals
 with doorbell-type hardware, but we do have quite a few precedent drivers
 already and changing the binding to add a data field would not make it any
 better, but could cause other problems. So he is happy with the status quo
 of SCMI implementation.
 
 [1] http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.den0056a/index.html
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Merge tag 'scmi-updates-4.17' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/sudeep.holla/linux into next/drivers

Pull "ARM SCMI support for v4.17" from Sudeep Holla:

ARM System Control and Management Interface(SCMI)[1] is more flexible and
easily extensible than any of the existing interfaces.

Few existing as well as future ARM platforms provide micro-controllers
to abstract various power and other system management tasks which have
similar interfaces, both in terms of the functions that are provided by
them, and in terms of how requests are communicated to them.

There are quite a few protocols like ARM SCPI, TI SCI, QCOM RPM, Nvidia Tegra
BPMP, and so on already. This specification is to standardize and avoid any
further fragmentation in the design of such interface by various vendors.

The current SCMI driver implementation is very basic and initial support.
It lacks support for notifications, asynchronous/delayed response, perf/power
statistics region and sensor register region.

Mailbox is the only form of transport supported currently in the driver.
SCMI supports interrupt based mailbox communication, where, on completion
of the processing of a message, the caller receives an interrupt as well as
polling for completion.

SCMI is designed to minimize the dependency on the mailbox/transport
hardware. So in terms of SCMI, each channel in the mailbox includes
memory area, doorbell and completion interrupt.

However the doorbell and completion interrupt is highly mailbox dependent
which was bit of controversial as part of SCMI/mailbox discussions.

Arnd and me discussed about the few aspects of SCMI and the mailbox framework:

1. Use of mailbox framework for doorbell type mailbox controller:
   - Such hardware may not require any data to be sent to signal the remote
     about the presence of a message. The channel will have in-built
     information on how to trigger the signal to the remote.
     There are few mailbox controller drivers which are purely doorbell based.
     e.g.QCOM IPC, STM, Tegra, ACPI PCC,..etc

2. Supporting other mailbox controller:
   - SCMI just needs a mechanism to signal the remote firmware. Such
     controller may need fixed message to be sent to trigger a doorbell.
     In such case we may need to get that data from DT and pass the same
     to the controller. It's not covered in the current DT binding, but
     can be extended as optional property in future.

     However handling notifications may be interesting on such mailbox, but
     again there is no way to interpret what the data field(remote message)
     means, it could be a bit mask or a number or don't-care.

Arnd mentioned that he doesn't like the way the mailbox binding deals
with doorbell-type hardware, but we do have quite a few precedent drivers
already and changing the binding to add a data field would not make it any
better, but could cause other problems. So he is happy with the status quo
of SCMI implementation.

[1] http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.den0056a/index.html

* tag 'scmi-updates-4.17' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/sudeep.holla/linux:
  cpufreq: scmi: add support for fast frequency switching
  cpufreq: add support for CPU DVFS based on SCMI message protocol
  hwmon: add support for sensors exported via ARM SCMI
  hwmon: (core) Add hwmon_max to hwmon_sensor_types enumeration
  clk: add support for clocks provided by SCMI
  firmware: arm_scmi: add device power domain support using genpd
  firmware: arm_scmi: add per-protocol channels support using idr objects
  firmware: arm_scmi: refactor in preparation to support per-protocol channels
  firmware: arm_scmi: add option for polling based performance domain operations
  firmware: arm_scmi: add support for polling based SCMI transfers
  firmware: arm_scmi: probe and initialise all the supported protocols
  firmware: arm_scmi: add initial support for sensor protocol
  firmware: arm_scmi: add initial support for power protocol
  firmware: arm_scmi: add initial support for clock protocol
  firmware: arm_scmi: add initial support for performance protocol
  firmware: arm_scmi: add scmi protocol bus to enumerate protocol devices
  firmware: arm_scmi: add common infrastructure and support for base protocol
  firmware: arm_scmi: add basic driver infrastructure for SCMI
  dt-bindings: arm: add support for ARM System Control and Management Interface(SCMI) protocol
  dt-bindings: mailbox: add support for mailbox client shared memory
2018-03-07 16:45:07 +01:00
Sudeep Holla
898216c97e firmware: arm_scmi: add device power domain support using genpd
This patch hooks up the support for device power domain provided by
SCMI using the Linux generic power domain infrastructure.

Cc: Kevin Hilman <khilman@baylibre.com>
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
2018-02-28 16:37:57 +00:00
Sudeep Holla
907b6d1491 firmware: arm_scmi: add per-protocol channels support using idr objects
In order to maintain the channel information per protocol, we need
some sort of list or hashtable to hold all this information. IDR
provides sparse array mapping of small integer ID numbers onto arbitrary
pointers. In this case the arbitrary pointers can be pointers to the
channel information.

This patch adds support for per-protocol channels using those idr
objects.

Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
2018-02-28 16:37:57 +00:00
Sudeep Holla
fbc4d81ad2 firmware: arm_scmi: refactor in preparation to support per-protocol channels
In order to support per-protocol channels if available, we need to
factor out all the mailbox channel information(Tx/Rx payload and
channel handle) out of the main SCMI instance information structure.

This patch refactors the existing channel information into a separate
chan_info structure.

Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
2018-02-28 16:37:57 +00:00
Sudeep Holla
5c4ba3cc85 firmware: arm_scmi: add option for polling based performance domain operations
In order to implement fast CPU DVFS switching, we need to perform all
DVFS operations atomically. Since SCMI transfer already provide option
to choose between pooling vs interrupt driven(default), we can opt for
polling based transfers for set,get performance domain operations.

This patch adds option to choose between polling vs interrupt driven
SCMI transfers for set,get performance level operations.

Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
2018-02-28 16:37:57 +00:00
Sudeep Holla
d4c3751a8d firmware: arm_scmi: add support for polling based SCMI transfers
It would be useful to have options to perform some SCMI transfers
atomically by polling for the completion flag instead of interrupt
driven. The SCMI specification has option to disable the interrupt and
poll for the completion flag in the shared memory.

This patch adds support for polling based SCMI transfers using that
option. This might be used for uninterrupted/atomic DVFS operations
from the scheduler context.

Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
2018-02-28 16:37:57 +00:00
Sudeep Holla
bc40081d98 firmware: arm_scmi: probe and initialise all the supported protocols
Now that we have basic support for all the protocols in the
specification, let's probe them individually and initialise them.

Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
2018-02-28 16:37:57 +00:00
Sudeep Holla
5179c523c1 firmware: arm_scmi: add initial support for sensor protocol
The sensor protocol provides functions to manage platform sensors, and
provides the commands to describe the protocol version and the various
attribute flags. It also provides commands to discover various sensors
implemented and managed by the platform, read any sensor synchronously
or asynchronously as allowed by the platform, program sensor attributes
and/or configurations, if applicable.

This patch adds support for most of the above features.

Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
2018-02-28 16:37:57 +00:00