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Lukas Wunner 46cd4b75cd efi: Add device path parser 
We're about to extended the efistub to retrieve device properties from
EFI on Apple Macs. The properties use EFI Device Paths to indicate the
device they belong to. This commit adds a parser which, given an EFI
Device Path, locates the corresponding struct device and returns a
reference to it.

Initially only ACPI and PCI Device Path nodes are supported, these are
the only types needed for Apple device properties (the corresponding
macOS function AppleACPIPlatformExpert::matchEFIDevicePath() does not
support any others). Further node types can be added with little to
moderate effort.

Apple device properties is currently the only use case of this parser,
but Peter Jones intends to use it to match up devices with the
ConInDev/ConOutDev/ErrOutDev variables and add sysfs attributes to these
devices to say the hardware supports using them as console. Thus,
make this parser a separate component which can be selected with config
option EFI_DEV_PATH_PARSER. It can in principle be compiled as a module
if acpi_get_first_physical_node() and acpi_bus_type are exported (and
efi_get_device_by_path() itself is exported).

The dependency on CONFIG_ACPI is needed for acpi_match_device_ids().
It can be removed if an empty inline stub is added for that function.

Signed-off-by: Lukas Wunner <lukas@wunner.de>
Signed-off-by: Matt Fleming <matt@codeblueprint.co.uk>
Cc: Andreas Noever <andreas.noever@gmail.com>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
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/20161112213237.8804-7-matt@codeblueprint.co.uk
Signed-off-by: Ingo Molnar <mingo@kernel.org>
 		2016-11-13 08:23:15 +01:00
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accessibility
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acpi Merge branch 'device-properties' 2016-11-11 23:23:02 +01:00
amba
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android ANDROID: binder: Clear binder and cookie when setting handle in flat binder struct 2016-10-24 19:37:48 +02:00
ata ahci: fix the single MSI-X case in ahci_init_one 2016-10-25 11:43:07 -04:00
atm
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auxdisplay auxdisplay: img-ascii-lcd: driver for simple ASCII LCD displays 2016-10-06 17:03:41 +02:00
base PM / sleep: don't suspend parent when async child suspend_{noirq, late} fails 2016-11-11 01:29:09 +01:00
bcma
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block drbd: Fix kernel_sendmsg() usage - potential NULL deref 2016-11-09 17:08:32 -07:00
bluetooth Bluetooth: btwilink: Fix probe return value 2016-10-20 10:14:49 +02:00
bus bus: qcom-ebi2: depend on ARCH_QCOM or COMPILE_TEST 2016-10-17 13:46:09 -07:00
cdrom
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char virtio: tests, fixes and cleanups 2016-11-01 16:56:05 -06:00
clk clk: at91: Fix a return value in case of error 2016-10-20 16:37:56 -07:00
clocksource Revert "clocksource/drivers/timer_sun5i: Replace code by clocksource_mmio_init" 2016-10-20 21:58:58 +02:00
connector
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cpufreq Merge branches 'pm-cpufreq-fixes' and 'pm-sleep-fixes' 2016-10-29 01:29:17 +02:00
cpuidle Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2016-10-15 09:26:12 -07:00
crypto Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2016-10-10 14:04:16 -07:00
dax device-dax: fix percpu_ref_exit ordering 2016-10-27 17:04:05 -07:00
dca
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devfreq PM / devfreq: Skip status update on uninitialized previous_freq 2016-10-11 00:01:20 +02:00
dio
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dma dmaengine updates for 4.8-rc1 2016-10-06 17:13:54 -07:00
dma-buf Merge tag 'drm-for-v4.9' of git://people.freedesktop.org/~airlied/linux 2016-10-11 18:12:22 -07:00
edac * Altera Arria10 enablement of NAND, DMA, USB, QSPI and SD-MMC FIFO 2016-10-04 12:06:26 -07:00
eisa
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extcon extcon: qcom-spmi-misc: Sync the extcon state on interrupt 2016-10-26 16:04:29 +09:00
firewire firewire: net: fix fragmented datagram_size off-by-one 2016-11-03 14:46:39 +01:00
firmware efi: Add device path parser 2016-11-13 08:23:15 +01:00
fmc
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fpga
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gpio gpio/mvebu: Use irq_domain_add_linear 2016-11-01 19:31:49 +01:00
gpu imx-drm: fix possible hangup when disabling crtcs 2016-11-11 09:09:57 +10:00
hid HID: sensor: fix attributes in HID sensor interface 2016-11-05 16:56:09 +01:00
hsi
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hv hv: do not lose pending heartbeat vmbus packets 2016-10-25 08:52:10 +02:00
hwmon hwmon: (core) fix resource leak on devm_kcalloc failure 2016-10-24 06:05:13 -07:00
hwspinlock
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hwtracing
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i2c i2c: core: fix NULL pointer dereference under race condition 2016-11-04 20:36:58 +01:00
ide
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idle nmi_backtrace: generate one-line reports for idle cpus 2016-10-07 18:46:30 -07:00
iio First set of IIO fixes for the 4.9 cycle. 2016-10-24 10:50:13 +02:00
infiniband infiniband: shut up a maybe-uninitialized warning 2016-11-11 08:45:08 -08:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2016-11-05 11:26:11 -07:00
iommu iommu/vt-d: Fix dead-locks in disable_dmar_iommu() path 2016-11-08 15:08:26 +01:00
ipack ipack: print a hex number after a 0x prefix 2016-10-27 18:43:43 -07:00
irqchip GIC updates for Linux 4.9-rc2 2016-10-21 21:40:29 +02:00
isdn
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leds
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lguest
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lightnvm Merge branch 'for-4.9/block' of git://git.kernel.dk/linux-block 2016-10-07 14:42:05 -07:00
macintosh
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mailbox Merge branch 'mailbox-for-next' of git://git.linaro.org/landing-teams/working/fujitsu/integration 2016-10-06 17:36:53 -07:00
mcb mcb: Add a dma_device to mcb_device 2016-09-27 12:33:47 +02:00
md Merge tag 'md/4.9-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md 2016-11-05 11:34:07 -07:00
media rc: print correct variable for z8f0811 2016-11-11 08:45:08 -08:00
memory ARM: SoC driver updates for v4.9 2016-10-07 21:23:40 -07:00
memstick memstick: rtsx_usb_ms: Manage runtime PM when accessing the device 2016-10-17 15:43:05 +02:00
message
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mfd - Core Frameworks 2016-10-07 08:35:35 -07:00
misc Char/Misc driver fixes for 4.9-rc3 2016-10-29 11:19:02 -07:00
mmc mmc: mxs: Initialize the spinlock prior to using it 2016-11-07 13:30:08 +01:00
mtd MTD updates for 4.9-rc4: 2016-11-05 10:52:29 -07:00
net Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-10-29 20:33:20 -07:00
nfc
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ntb
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nubus
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nvdimm nvdimm: make CONFIG_NVDIMM_DAX 'bool' 2016-10-27 16:16:21 -07:00
nvme Merge branch 'for-linus' of git://git.kernel.dk/linux-block 2016-10-21 10:54:01 -07:00
nvmem ARM: SoC driver updates for v4.9 2016-10-07 21:23:40 -07:00
of Revert "console: don't prefer first registered if DT specifies stdout-path" 2016-11-11 08:12:37 -08:00
oprofile Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2016-10-10 20:16:43 -07:00
parisc
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parport
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pci pci-v4.9-fixes-3 2016-11-11 16:38:26 -08:00
pcmcia pcmcia: fix return value of soc_pcmcia_regulator_set 2016-11-11 08:45:08 -08:00
perf perf: xgene: Remove bogus IS_ERR() check 2016-10-17 15:50:07 +01:00
phy
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pinctrl pinctrl-aspeed-g5: Never set SCU90[6] 2016-11-07 10:31:33 +01:00
platform ACPI fix for v4.9-rc5 2016-11-11 17:02:01 -08:00
pnp
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power power supply and reset changes for the v4.9 series 2016-10-06 18:21:15 -07:00
powercap
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pps pps: kc: fix non-tickless system config dependency 2016-10-11 15:06:32 -07:00
ps3
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ptp drivers/ptp: Fix kernel memory disclosure 2016-10-13 10:20:06 -04:00
pwm
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rapidio mm: replace get_user_pages() write/force parameters with gup_flags 2016-10-19 08:11:43 -07:00
ras
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regulator regulator: core: silence warning: "VDD1: ramp_delay not set" 2016-10-28 18:22:40 +01:00
remoteproc rpmsg updates for v4.9 2016-10-06 17:03:49 -07:00
reset reset: uniphier: rename MIO reset to SD reset for Pro5, PXs2, LD20 SoCs 2016-10-22 18:31:42 +09:00
rpmsg
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rtc RTC for 4.9 2016-10-14 13:13:44 -07:00
s390 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux 2016-10-27 14:16:30 -07:00
sbus
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scsi SCSI fixes on 20161105 2016-11-05 11:28:21 -07:00
sfi
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sh
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sn
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soc powerpc updates for 4.9 #2 2016-10-14 11:07:42 -07:00
spi Merge remote-tracking branches 'spi/fix/dt', 'spi/fix/fsl-dspi' and 'spi/fix/fsl-espi' into spi-linus 2016-10-29 12:51:55 -06:00
spmi spmi: pmic-arb: Return an error code if sanity check fails 2016-09-27 12:43:34 +02:00
ssb
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staging media fixes for v4.9-rc4 2016-11-05 11:15:09 -07:00
target target/tcm_fc: use CPU affinity for responses 2016-10-21 01:19:44 -07:00
tc
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thermal thermal/powerclamp: correct cpu support check 2016-10-20 14:15:44 +08:00
thunderbolt
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tty tty: serial_core: fix NULL struct tty pointer access in uart_write_wakeup 2016-10-28 08:13:07 -04:00
uio
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usb usb: chipidea: host: fix NULL ptr dereference during shutdown 2016-10-25 16:14:32 +08:00
uwb
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vfio vfio/pci: Fix integer overflows, bitmask check 2016-10-26 13:49:29 -06:00
vhost
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video Merge branch 'linus' into efi/core, to pick up fixes 2016-11-13 08:16:40 +01:00
virt mm: replace get_user_pages() write/force parameters with gup_flags 2016-10-19 08:11:43 -07:00
virtio virtio_ring: mark vring_dma_dev inline 2016-10-31 00:40:08 +02:00
vlynq
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vme vme: vme_get_size potentially returning incorrect value on failure 2016-10-28 08:25:18 -04:00
w1
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watchdog Merge branches 'acpi-wdat' and 'acpi-cppc' 2016-10-21 22:24:23 +02:00
xen xen: fixes for 4.9-rc2 2016-10-24 19:52:24 -07:00
zorro
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Kconfig
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Makefile A small bug fix and a new driver for acting as an IPMI device. 2016-10-23 15:56:23 -07:00