Commit Graph

796626 Commits

Author SHA1 Message Date
Alexey Budankov
cf7905165f perf record: Encode -k clockid frequency into Perf trace
Store -k clockid frequency into Perf trace to enable timestamps
derived metrics conversion into wall clock time on reporting stage.

Below is the example of perf report output:

  tools/perf/perf record -k raw -- ../../matrix/linux/matrix.gcc
  ...
  [ perf record: Captured and wrote 31.222 MB perf.data (818054 samples) ]

  tools/perf/perf report --header
  # ========
  ...
  # event : name = cycles:ppp, , size = 112, { sample_period, sample_freq } = 4000, sample_type = IP|TID|TIME|PERIOD, disabled = 1, inherit = 1, mmap = 1, comm = 1, freq = 1, enable_on_exec = 1, task = 1, precise_ip = 3, sample_id_all = 1, exclude_guest = 1, mmap2 = 1, comm_exec = 1, use_clockid = 1, clockid = 4
  ...
  # clockid frequency: 1000 MHz
  ...
  # ========

Signed-off-by: Alexey Budankov <alexey.budankov@linux.intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/23a4a1dc-b160-85a0-347d-40a2ed6d007b@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2018-10-18 11:16:38 -03:00
Arnaldo Carvalho de Melo
ce6c9da111 Merge remote-tracking branch 'tip/perf/urgent' into perf/core
To pick up fixes.

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2018-10-18 11:13:01 -03:00
Christophe Leroy
a0e102914a powerpc/io: remove old GCC version implementation
GCC 4.6 is the minimum supported now.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2018-10-19 00:56:17 +11:00
Michael Ellerman
23ad1a2700 powerpc: Add -Werror at arch/powerpc level
Back when I added -Werror in commit ba55bd7436 ("powerpc: Add
configurable -Werror for arch/powerpc") I did it by adding it to most
of the arch Makefiles.

At the time we excluded math-emu, because apparently it didn't build
cleanly. But that seems to have been fixed somewhere in the interim.

So move the -Werror addition to the top-level of the arch, this saves
us from repeating it in every Makefile and means we won't forget to
add it to any new sub-dirs.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2018-10-19 00:56:17 +11:00
Michael Ellerman
c47ca98d32 powerpc: Move core kernel logic into arch/powerpc/Kbuild
This is a nice cleanup, arch/powerpc/Makefile is long and messy so
moving this out helps a little.

It also allows us to do:

  $ make arch/powerpc

Which can be helpful if you just want to compile test some changes to
arch code and not link everything.

Finally it also gives us a single place to do subdir-cc-flags
assignments which affect the whole of arch/powerpc, which we will do
in a future patch.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2018-10-19 00:56:17 +11:00
Benjamin Herrenschmidt
fc0c8b36d3 macintosh/windfarm_smu_sat: Fix debug output
There's some antiquated debug output that's trying
to do a hand-made hexdump and turning into horrible
1-byte-per-line output these days.

Use print_hex_dump() instead

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2018-10-19 00:56:17 +11:00
Christophe Leroy
bd03fd84a5 powerpc/traps: remove redundant in_interrupt panic in die()
do_exit() already includes a test to panic() is in_interrupt()

This patch removes powerpc one which is redundant.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2018-10-19 00:56:17 +11:00
Benjamin Herrenschmidt
f1f208e54d powerpc/prom_init: Generate "phandle" instead of "linux, phandle"
When creating the boot-time FDT from an actual Open Firmware live
tree, let's generate "phandle" properties for the phandles instead
of the old deprecated "linux,phandle".

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
[mpe: Unsplit warning printf()]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2018-10-19 00:56:17 +11:00
Benjamin Herrenschmidt
2c51d97ee8 powerpc: Check prom_init for disallowed sections
prom_init.c must not modify the kernel image outside
of the .bss.prominit section. Thus make sure that
prom_init.o doesn't have anything in any of these:

	.data
	.bss
	.init.data

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2018-10-19 00:56:17 +11:00
Benjamin Herrenschmidt
5f69e38885 powerpc/prom_init: Move __prombss to it's own section and store it in .bss
This makes __prombss its own section, and for now store
it in .bss.

This will give us the ability later to store it elsewhere
and/or free it after boot (it's about 8KB).

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2018-10-19 00:56:17 +11:00
Benjamin Herrenschmidt
8ca2d5151e powerpc/prom_init: Move a few remaining statics to appropriate sections
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2018-10-19 00:56:17 +11:00
Benjamin Herrenschmidt
d00e34b92c powerpc/prom_init: Move const structures to __initconst
As they are no longer used past the end of prom_init

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2018-10-19 00:56:17 +11:00
Benjamin Herrenschmidt
a614f52e75 powerpc/prom_init: Move ibm_arch_vec to __prombss
Make the existing initialized definition constant and copy
it to a __prombss copy

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2018-10-19 00:56:17 +11:00
Benjamin Herrenschmidt
c886087cae powerpc/prom_init: Move prom_radix_disable to __prombss
Initialize it dynamically instead of statically

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2018-10-19 00:56:17 +11:00
Benjamin Herrenschmidt
11fdb30934 powerpc/prom_init: Remove support for OPAL v2
We removed support for running under any OPAL version
earlier than v3 in 2015 (they never saw the light of day
anyway), but we kept some leftovers of this support in
prom_init.c, so let's take it out.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2018-10-19 00:56:17 +11:00
Benjamin Herrenschmidt
e63334e556 powerpc/prom_init: Replace __initdata with __prombss when applicable
This replaces all occurrences of __initdata for uninitialized
data with a new __prombss

Currently __promdata is defined to be __initdata but we'll
eventually change that.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2018-10-19 00:56:17 +11:00
Oliver O'Halloran
b5beae5e22 powerpc/pseries: Add driver for PAPR SCM regions
Adds a driver that implements support for enabling and accessing PAPR
SCM regions. Unfortunately due to how the PAPR interface works we can't
use the existing of_pmem driver (yet) because:

 a) The guest is required to use the H_SCM_BIND_MEM h-call to add
    add the SCM region to it's physical address space, and
 b) There is currently no mechanism for relating a bare of_pmem region
    to the backing DIMM (or not-a-DIMM for our case).

Both of these are easily handled by rolling the functionality into a
seperate driver so here we are...

Acked-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Oliver O'Halloran <oohall@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2018-10-19 00:56:17 +11:00
Oliver O'Halloran
4c5d87db49 powerpc/pseries: PAPR persistent memory support
This patch implements support for discovering storage class memory
devices at boot and for handling hotplug of new regions via RTAS
hotplug events.

Signed-off-by: Oliver O'Halloran <oohall@gmail.com>
[mpe: Fix CONFIG_MEMORY_HOTPLUG=n build]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2018-10-19 00:56:17 +11:00
Christophe Leroy
422123ccb9 powerpc/traps: fix machine check handlers to use pr_cont()
When printing the machine check cause, the cause appears on the
following line due to bad use of printk without \n:

[   33.663993] Machine check in kernel mode.
[   33.664011] Caused by (from SRR1=9032):
[   33.664036] Data access error at address c90c8000

This patch fixes it by using pr_cont() for the second part:

[  133.258131] Machine check in kernel mode.
[  133.258146] Caused by (from SRR1=9032): Data access error at address c90c8000

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2018-10-19 00:56:17 +11:00
Christophe Leroy
bde1a1335c powerpc/book3e: redefine pte_mkprivileged() and pte_mkuser()
Book3e defines both _PAGE_USER and _PAGE_PRIVILEGED, so the nohash
default pte_mkprivileged() and pte_mkuser() are not usable.

This patch redefines them for book3e.

In theorie, only pte_mkprivileged() needs to be redefined because
_PAGE_USER includes _PAGE_PRIVILEGED, but it is less confusing
to redefine both.

Fixes: a0da4bc166 ("powerpc/mm: Allow platforms to redefine some helpers")
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2018-10-19 00:56:17 +11:00
Aneesh Kumar K.V
b9fb4480a3 powerpc/mm: Make pte_pgprot return all pte bits
Other archs do the same and instead of adding required pte bits (which
got masked out) in __ioremap_at(), make sure we filter only pfn bits
out.

Fixes: 26973fa5ac ("powerpc/mm: use pte helpers in generic code")
Reviewed-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2018-10-19 00:56:17 +11:00
Philipp Klocke
eb7ebfa3c1 ALSA: i2c/cs8427: Fix int to char conversion
Compiling with clang yields the following warning:

sound/i2c/cs8427.c:140:31: warning: implicit conversion from 'int'
to 'char' changes value from 160 to -96 [-Wconstant-conversion]
    data[0] = CS8427_REG_AUTOINC | CS8427_REG_CORU_DATABUF;
            ~ ~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

Because CS8427_REG_AUTOINC is defined as 128, it is too big for a
char field.
So change data from char to unsigned char, that it can hold the value.

This patch does not change the generated code.

Signed-off-by: Philipp Klocke <philipp97kl@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2018-10-18 15:44:08 +02:00
Ming Lei
744889b7cb block: don't deal with discard limit in blkdev_issue_discard()
blk_queue_split() does respect this limit via bio splitting, so no
need to do that in blkdev_issue_discard(), then we can align to
normal bio submit(bio_add_page() & submit_bio()).

More importantly, this patch fixes one issue introduced in a22c4d7e34
("block: re-add discard_granularity and alignment checks"), in which
zero discard bio may be generated in case of zero alignment.

Fixes: a22c4d7e34 ("block: re-add discard_granularity and alignment checks")
Cc: stable@vger.kernel.org
Cc: Ming Lin <ming.l@ssi.samsung.com>
Cc: Mike Snitzer <snitzer@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Xiao Ni <xni@redhat.com>
Tested-by: Mariusz Dabrowski <mariusz.dabrowski@intel.com>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-10-18 07:23:40 -06:00
Greg Kroah-Hartman
89303c7ea7 Merge tag 'usb-serial-4.20-rc1' of https://git.kernel.org/pub/scm/linux/kernel/git/johan/usb-serial into usb-next
Johan writes:

USB-serial updates for v4.20-rc1

Here are the USB-serial updates for 4.20-rc1, including:

 - support for CBUS GPIO on FTDI devices (FTX and FT232R)
 - fix of a long-standing transfer-length bug

Included are also various clean ups.

All have been in linux-next with no reported issues.

Signed-off-by: Johan Hovold <johan@kernel.org>

* tag 'usb-serial-4.20-rc1' of https://git.kernel.org/pub/scm/linux/kernel/git/johan/usb-serial:
  USB: serial: cypress_m8: remove set but not used variable 'iflag'
  USB: serial: cypress_m8: fix interrupt-out transfer length
  USB: serial: ftdi_sio: add support for FT232R CBUS gpios
  USB: serial: ftdi_sio: fix gpio name collisions
  USB: serial: ftdi_sio: implement GPIO support for FT-X devices
  USB: serial: cypress_m8: fix spelling mistake "retreiving" -> "retrieving"
2018-10-18 14:59:04 +02:00
Rafael J. Wysocki
0a1875ad29 Merge branches 'acpi-property' and 'acpi-sbs'
* acpi-property:
  ACPI / property: Switch to bitmap_zalloc()

* acpi-sbs:
  ACPI / SBS: Fix rare oops when removing modules
  ACPI / SBS: Fix GPE storm on recent MacBookPro's
2018-10-18 12:37:51 +02:00
Rafael J. Wysocki
1f825f74c1 Merge branches 'acpi-soc', 'acpi-processor', 'acpi-pmic', 'acpi-cppc' and 'acpi-tad'
* acpi-soc:
  ACPI / LPSS: Resume BYT/CHT I2C controllers from resume_noirq
  ACPI / LPSS: Add a device link from the GPU to the BYT I2C5 controller
  ACPI / LPSS: Add a device link from the GPU to the CHT I2C7 controller
  ACPI / LPSS: Make acpi_lpss_find_device() also find PCI devices
  ACPI / LPSS: Make hid_uid_match helper accept a NULL uid argument
  ACPI / LPSS: Make hid_uid_match helper take an acpi_device as first argument
  ACPI / LPSS: Exclude I2C busses shared with PUNIT from pmc_atom_d3_mask
  ACPI / LPSS: Add alternative ACPI HIDs for Cherry Trail DMA controllers

* acpi-processor:
  ACPI / processor: Fix the return value of acpi_processor_ids_walk()

* acpi-pmic:
  ACPI / PMIC: Convert drivers to use SPDX identifier
  ACPI / PMIC: Sort headers alphabetically

* acpi-cppc:
  mailbox: PCC: handle parse error

* acpi-tad:
  ACPI: TAD: Add low-level support for real time capability
2018-10-18 12:37:27 +02:00
Rafael J. Wysocki
bd371e088b Merge branches 'acpi-init', 'acpi-osl', 'acpi-bus', 'acpi-tables' and 'acpi-misc'
* acpi-init:
  ACPI: probe ECDT before loading AML tables regardless of module-level code flag

* acpi-osl:
  ACPI / OSL: Use 'jiffies' as the time bassis for acpi_os_get_timer()

* acpi-bus:
  ACPI / glue: Split dev_is_platform() out of module for wide use

* acpi-tables:
  ACPI/PPTT: Handle architecturally unknown cache types
  drivers: base: cacheinfo: Do not populate sysfs for unknown cache types

* acpi-misc:
  ACPI: remove redundant 'default n' from Kconfig
  ACPI: custom_method: remove meaningless null check before debugfs_remove()
2018-10-18 12:37:11 +02:00
Rafael J. Wysocki
cc19b05e38 Merge branches 'pm-devfreq' and 'pm-tools'
* pm-devfreq:
  PM / devfreq: remove redundant null pointer check before kfree
  PM / devfreq: stopping the governor before device_unregister()
  PM / devfreq: Convert to using %pOFn instead of device_node.name
  PM / devfreq: Make update_devfreq() public
  PM / devfreq: Don't adjust to user limits in governors
  PM / devfreq: Fix handling of min/max_freq == 0
  PM / devfreq: Drop custom MIN/MAX macros
  PM / devfreq: Fix devfreq_add_device() when drivers are built as modules.

* pm-tools:
  PM / tools: sleepgraph and bootgraph: upgrade to v5.2
  PM / tools: sleepgraph: first batch of v5.2 changes
  cpupower: Fix coredump on VMWare
  cpupower: Fix AMD Family 0x17 msr_pstate size
  cpupower: remove stringop-truncation waring
2018-10-18 12:28:12 +02:00
Rafael J. Wysocki
5d113aa679 Merge branches 'pm-opp' and 'powercap'
* pm-opp:
  PM / OPP: _of_add_opp_table_v2(): increment count only if OPP is added
  cpufreq: dt: Try freeing static OPPs only if we have added them
  OPP: Return error on error from dev_pm_opp_get_opp_count()
  OPP: Improve error handling in dev_pm_opp_of_cpumask_add_table()
  OPP: Pass OPP table to _of_add_opp_table_v{1|2}()
  OPP: Prevent creating multiple OPP tables for devices sharing OPP nodes
  OPP: Use a single mechanism to free the OPP table
  OPP: Don't remove dynamic OPPs from _dev_pm_opp_remove_table()
  cpufreq: mvebu: Remove OPPs using dev_pm_opp_remove()
  OPP: Create separate kref for static OPPs list
  OPP: Don't take OPP table's kref for static OPPs
  OPP: Parse OPP table's DT properties from _of_init_opp_table()
  OPP: Pass index to _of_init_opp_table()
  OPP: Protect dev_list with opp_table lock
  OPP: Don't try to remove all OPP tables on failure
  OPP: Free OPP table properly on performance state irregularities

* powercap:
  powercap: RAPL: Get rid of custom RAPL_CPU() macro
2018-10-18 12:27:51 +02:00
Rafael J. Wysocki
3f858ae02c Merge branches 'acpi-pm' and 'pm-sleep'
* acpi-pm:
  ACPI / PM: LPIT: Register sysfs attributes based on FADT

* pm-sleep:
  x86-32, hibernate: Adjust in_suspend after resumed on 32bit system
  x86-32, hibernate: Set up temporary text mapping for 32bit system
  x86-32, hibernate: Switch to relocated restore code during resume on 32bit system
  x86-32, hibernate: Switch to original page table after resumed
  x86-32, hibernate: Use the page size macro instead of constant value
  x86-32, hibernate: Use temp_pgt as the temporary page table
  x86, hibernate: Rename temp_level4_pgt to temp_pgt
  x86-32, hibernate: Enable CONFIG_ARCH_HIBERNATION_HEADER on 32bit system
  x86, hibernate: Extract the common code of 64/32 bit system
  x86-32/asm/power: Create stack frames in hibernate_asm_32.S
  PM / hibernate: Check the success of generating md5 digest before hibernation
  x86, hibernate: Fix nosave_regions setup for hibernation
  PM / sleep: Show freezing tasks that caused a suspend abort
  PM / hibernate: Documentation: fix image_size default value
2018-10-18 12:27:30 +02:00
Rafael J. Wysocki
d1551f7a5a Merge branch 'pm-cpufreq'
* pm-cpufreq:
  cpufreq: tegra186: don't pass GFP_DMA32 to dma_alloc_coherent()
  cpufreq: conservative: Take limits changes into account properly
  Documentation: intel_pstate: Add base_frequency information
  cpufreq: intel_pstate: Add base_frequency attribute
  ACPI / CPPC: Add support for guaranteed performance
  cpufreq: imx6q: read OCOTP through nvmem for imx6ul/imx6ull
  cpufreq: dt-platdev: allow RK3399 to have separate tunables per cluster
  cpufreq / CPPC: Mark acpi_ids as used
  cpufreq: dt: Add support for r8a7744
  cpufreq: Convert to using %pOFn instead of device_node.name
  cpufreq: remove unnecessary unlikely()
2018-10-18 12:26:11 +02:00
Rafael J. Wysocki
41fd838cda Merge branch 'pm-cpuidle'
* pm-cpuidle:
  cpuidle: menu: Avoid computations when result will be discarded
  cpuidle: menu: Drop redundant comparison
  cpuidle: menu: Simplify checks related to the polling state
  cpuidle: poll_state: Revise loop termination condition
  cpuidle: menu: Move the latency_req == 0 special case check
  cpuidle: menu: Avoid computations for very close timers
  cpuidle: menu: Do not update last_state_idx in menu_select()
  cpuidle: menu: Get rid of first_idx from menu_select()
  cpuidle: menu: Compute first_idx when latency_req is known
  cpuidle: menu: Fix wakeup statistics updates for polling state
  cpuidle: menu: Replace data->predicted_us with local variable
  cpuidle: enter_state: Don't needlessly calculate diff time
  cpuidle: Remove unnecessary wrapper cpuidle_get_last_residency()
  intel_idle: Get rid of custom ICPU() macro
2018-10-18 12:26:00 +02:00
Ulf Hansson
e5089c2c73 PM / Domains: Document flags for genpd
The current documented description of the GENPD_FLAG_* flags, are too
simplified, so let's extend them.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2018-10-18 12:25:10 +02:00
Ulf Hansson
2c9b7f8772 PM / Domains: Deal with multiple states but no governor in genpd
A caller of pm_genpd_init() that provides some states for the genpd via the
->states pointer in the struct generic_pm_domain, should also provide a
governor. This because it's the job of the governor to pick a state that
satisfies the constraints.

Therefore, let's print a warning to inform the user about such bogus
configuration and avoid to bail out, by instead picking the shallowest
state before genpd invokes the ->power_off() callback.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Lina Iyer <ilina@codeaurora.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2018-10-18 12:25:09 +02:00
Ulf Hansson
2c36168480 PM / Domains: Don't treat zero found compatible idle states as an error
Instead of returning -EINVAL from of_genpd_parse_idle_states() in case none
compatible states was found, let's return 0 to indicate success. Assign
also the out-parameter *states to NULL and *n to 0, to indicate to the
caller that zero states have been found/allocated.

This enables the caller of of_genpd_parse_idle_states() to easier act on
the returned error code.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Lina Iyer <ilina@codeaurora.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2018-10-18 12:25:09 +02:00
Rafael J. Wysocki
3c88a889b4 Merge branch 'acpica'
* acpica:
  ACPICA: Remove acpi_gbl_group_module_level_code and only use acpi_gbl_execute_tables_as_methods instead
  ACPICA: AML Parser: fix parse loop to correctly skip erroneous extended opcodes
  ACPICA: AML interpreter: add region addresses in global list during initialization
  ACPICA: Update version to 20181003
  ACPICA: Never run _REG on system_memory and system_IO
  ACPICA: Split large interpreter file
  ACPICA: Update for field unit access
  ACPICA: Rename some of the Field Attribute defines
  ACPICA: Update for generic_serial_bus and attrib_raw_process_bytes protocol
2018-10-18 12:20:59 +02:00
Eric Sandeen
fa520c47ea fscache: Fix out of bound read in long cookie keys
fscache_set_key() can incur an out-of-bounds read, reported by KASAN:

 BUG: KASAN: slab-out-of-bounds in fscache_alloc_cookie+0x5b3/0x680 [fscache]
 Read of size 4 at addr ffff88084ff056d4 by task mount.nfs/32615

and also reported by syzbot at https://lkml.org/lkml/2018/7/8/236

  BUG: KASAN: slab-out-of-bounds in fscache_set_key fs/fscache/cookie.c:120 [inline]
  BUG: KASAN: slab-out-of-bounds in fscache_alloc_cookie+0x7a9/0x880 fs/fscache/cookie.c:171
  Read of size 4 at addr ffff8801d3cc8bb4 by task syz-executor907/4466

This happens for any index_key_len which is not divisible by 4 and is
larger than the size of the inline key, because the code allocates exactly
index_key_len for the key buffer, but the hashing loop is stepping through
it 4 bytes (u32) at a time in the buf[] array.

Fix this by calculating how many u32 buffers we'll need by using
DIV_ROUND_UP, and then using kcalloc() to allocate a precleared allocation
buffer to hold the index_key, then using that same count as the hashing
index limit.

Fixes: ec0328e46d ("fscache: Maintain a catalogue of allocated cookies")
Reported-by: syzbot+a95b989b2dde8e806af8@syzkaller.appspotmail.com
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-10-18 11:32:21 +02:00
David Howells
1ff22883b0 fscache: Fix incomplete initialisation of inline key space
The inline key in struct rxrpc_cookie is insufficiently initialized,
zeroing only 3 of the 4 slots, therefore an index_key_len between 13 and 15
bytes will end up hashing uninitialized memory because the memcpy only
partially fills the last buf[] element.

Fix this by clearing fscache_cookie objects on allocation rather than using
the slab constructor to initialise them.  We're going to pretty much fill
in the entire struct anyway, so bringing it into our dcache writably
shouldn't incur much overhead.

This removes the need to do clearance in fscache_set_key() (where we aren't
doing it correctly anyway).

Also, we don't need to set cookie->key_len in fscache_set_key() as we
already did it in the only caller, so remove that.

Fixes: ec0328e46d ("fscache: Maintain a catalogue of allocated cookies")
Reported-by: syzbot+a95b989b2dde8e806af8@syzkaller.appspotmail.com
Reported-by: Eric Sandeen <sandeen@redhat.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-10-18 11:32:21 +02:00
Al Viro
169b803397 cachefiles: fix the race between cachefiles_bury_object() and rmdir(2)
the victim might've been rmdir'ed just before the lock_rename();
unlike the normal callers, we do not look the source up after the
parents are locked - we know it beforehand and just recheck that it's
still the child of what used to be its parent.  Unfortunately,
the check is too weak - we don't spot a dead directory since its
->d_parent is unchanged, dentry is positive, etc.  So we sail all
the way to ->rename(), with hosting filesystems _not_ expecting
to be asked renaming an rmdir'ed subdirectory.

The fix is easy, fortunately - the lock on parent is sufficient for
making IS_DEADDIR() on child safe.

Cc: stable@vger.kernel.org
Fixes: 9ae326a690 (CacheFiles: A cache that backs onto a mounted filesystem)
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-10-18 11:32:21 +02:00
Linus Torvalds
eb66ae0308 mremap: properly flush TLB before releasing the page
Jann Horn points out that our TLB flushing was subtly wrong for the
mremap() case.  What makes mremap() special is that we don't follow the
usual "add page to list of pages to be freed, then flush tlb, and then
free pages".  No, mremap() obviously just _moves_ the page from one page
table location to another.

That matters, because mremap() thus doesn't directly control the
lifetime of the moved page with a freelist: instead, the lifetime of the
page is controlled by the page table locking, that serializes access to
the entry.

As a result, we need to flush the TLB not just before releasing the lock
for the source location (to avoid any concurrent accesses to the entry),
but also before we release the destination page table lock (to avoid the
TLB being flushed after somebody else has already done something to that
page).

This also makes the whole "need_flush" logic unnecessary, since we now
always end up flushing the TLB for every valid entry.

Reported-and-tested-by: Jann Horn <jannh@google.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Tested-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-10-18 11:30:52 +02:00
Christoph Hellwig
19e6420e41 LICENSES: Remove CC-BY-SA-4.0 license text
Using non-GPL licenses for our documentation is rather problematic,
as it can directly include other files, which generally are GPLv2
licensed and thus not compatible.

Remove this license now that the only user (idr.rst) is gone to avoid
people semi-accidentally using it again.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-10-18 11:28:50 +02:00
Greg Kroah-Hartman
ca9f672f7c Merge branch 'ida-fixes-4.19-rc8' of git://git.infradead.org/users/willy/linux-dax
Matthew writes:
  "IDA/IDR fixes for 4.19

   I have two tiny fixes, one for the IDA test-suite and one for the IDR
   documentation license."

* 'ida-fixes-4.19-rc8' of git://git.infradead.org/users/willy/linux-dax:
  idr: Change documentation license
  test_ida: Fix lockdep warning
2018-10-18 11:24:32 +02:00
Dongjiu Geng
58bf437ff6 arm/arm64: KVM: Enable 32 bits kvm vcpu events support
The commit 539aee0edb ("KVM: arm64: Share the parts of
get/set events useful to 32bit") shares the get/set events
helper for arm64 and arm32, but forgot to share the cap
extension code.

User space will check whether KVM supports vcpu events by
checking the KVM_CAP_VCPU_EVENTS extension

Acked-by: James Morse <james.morse@arm.com>
Reviewed-by : Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Dongjiu Geng <gengdongjiu@huawei.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2018-10-18 10:14:03 +01:00
Dongjiu Geng
375bdd3b5d arm/arm64: KVM: Rename function kvm_arch_dev_ioctl_check_extension()
Rename kvm_arch_dev_ioctl_check_extension() to
kvm_arch_vm_ioctl_check_extension(), because it does
not have any relationship with device.

Renaming this function can make code readable.

Cc: James Morse <james.morse@arm.com>
Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Dongjiu Geng <gengdongjiu@huawei.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2018-10-18 10:12:53 +01:00
Takashi Iwai
f90afe7955 ALSA: doc: Brush up the old writing-an-alsa-driver
Slightly brushing up and throw the old dust away from my ancient
writing-an-alsa-driver document.  The contents aren't changed so much
but the obsoleted parts are dropped.

Also, remove the date and the version number.  It's useless.

Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2018-10-18 10:30:01 +02:00
Balakrishna Godavarthi
c614ca3f74 Bluetooth: hci_qca: Add support for controller debug logs.
This patch will prevent error messages splashing on console.

[   78.426697] Bluetooth: hci_core.c:hci_acldata_packet() hci0: ACL packet for unknown connection handle 3804
[   78.436682] Bluetooth: hci_core.c:hci_acldata_packet() hci0: ACL packet for unknown connection handle 3804
[   78.446639] Bluetooth: hci_core.c:hci_acldata_packet() hci0: ACL packet for unknown connection handle 3804
[   78.456596] Bluetooth: hci_core.c:hci_acldata_packet() hci0: ACL packet for unknown connection handle 3804

QCA wcn3990 will send the debug logs in the form of ACL packets.
While decoding packet in qca_recv(), marking the received debug log
packet as diagnostic packet.

Signed-off-by: Harish Bandi <c-hbandi@codeaurora.org>
Signed-off-by: Balakrishna Godavarthi <bgodavar@codeaurora.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2018-10-18 09:55:16 +02:00
Anusha Srivatsa
835fe6d75d firmware/dmc/icl: Add missing MODULE_FIRMWARE() for Icelake.
Add missing MODULE_FIRMWARE while loading DMC ICL.

v2: Add Fixes tag. (Rodrigo)
v3: Rebase by Rodrigo after commit 7fe78985cd ("drm/i915/csr:
 restructure CSR firmware definition macros")
v4: Rodrigo fixing his own mess on commit mentioning on v3
    comment above.

Fixes: 4445930f1c ("firmware/dmc/icl: load v1.07 on icelake.")
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Cc: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Anusha Srivatsa <anusha.srivatsa@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com> (v2)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Tested-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181004223613.19938-1-rodrigo.vivi@intel.com
(cherry picked from commit 00e5d8b1eb)
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
2018-10-18 10:36:10 +03:00
Rafael J. Wysocki
f1c8e410cd cpuidle: menu: Avoid computations when result will be discarded
If the minimum interval taken into account in the average computation
loop in get_typical_interval() is less than the expected idle
duration determined so far, the resultant average cannot be greater
than that value as well and the entire return result of the function
is going to be discarded anyway going forward.

In that case, it is a waste of time to carry out the remaining
computations in get_typical_interval(), so avoid that by returning
early if the minimum interval is not below the expected idle duration.

No intentional changes of behavior.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2018-10-18 09:34:13 +02:00
Rafael J. Wysocki
12b65eadf0 cpuidle: menu: Drop redundant comparison
Since the correction factor cannot be greater than RESOLUTION * DECAY,
the result of the predicted_us computation in menu_select() cannot be
greater than data->next_timer_us, so it is not necessary to compare
the "typical interval" value coming from get_typical_interval() with
data->next_timer_us separately.

It is sufficient to copmare predicted_us with the return value of
get_typical_interval() directly, so do that and drop the now
redundant expected_interval variable.

No intentional changes of behavior.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2018-10-18 09:34:13 +02:00
Chaitanya Kulkarni
3045c0d05e nvme-pci: remove duplicate check
This is a cleanup patch doesn't change any functionality. It removes
the duplicate call to the blk_integrity_rq() in the nvme_map_data().

Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2018-10-18 09:31:43 +02:00