linux-stable.git/drivers/char/Kconfig, branch v5.7

Merge tag 'random_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/random

2020-04-05T17:59:18+00:00

Pull /dev/random updates from Ted Ts'o:

 - Improve getrandom and /dev/random's support for those arm64
   architecture variants that have RNG instructions.

 - Use batched output from CRNG instead of CPU's RNG instructions for
   better performance.

 - Miscellaneous bug fixes.

* tag 'random_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/random:
  random: avoid warnings for !CONFIG_NUMA builds
  random: fix data races at timer_rand_state
  random: always use batched entropy for get_random_u{32,64}
  random: Make RANDOM_TRUST_CPU depend on ARCH_RANDOM
  arm64: add credited/trusted RNG support
  random: add arch_get_random_*long_early()
  random: split primary/secondary crng init paths

rtc/alpha: remove legacy rtc driver

2020-03-19T06:41:02+00:00

The old drivers/char/rtc.c driver was originally the implementation
for x86 PCs but got subsequently replaced by the rtc class driver
on all architectures except alpha.

Move alpha over to the portable driver and remove the old one
for good.

The CONFIG_JS_RTC option was only ever used on SPARC32 but
has not been available for many years, this was used to build
the same rtc driver with a different module name.

Cc: Richard Henderson 
Cc: Ivan Kokshaysky 
Cc: Matt Turner 
Cc: linux-alpha@vger.kernel.org
Cc: Paul Gortmaker 
Signed-off-by: Arnd Bergmann 
Signed-off-by: Alexandre Belloni 
Link: https://lore.kernel.org/r/20200226224322.187960-2-alexandre.belloni@bootlin.com
Signed-off-by: Greg Kroah-Hartman

rtc/ia64: remove legacy efirtc driver

2020-03-19T06:41:02+00:00

There are two EFI RTC drivers, the original drivers/char/efirtc.c
driver and the more modern drivers/rtc/rtc-efi.c.

Both implement the same interface, but the new one does so
in a more portable way.

Move everything over to that one and remove the old one.

Cc: linux-ia64@vger.kernel.org
Cc: Fenghua Yu 
Cc: Tony Luck 
Cc: Stephane Eranian 
Signed-off-by: Arnd Bergmann 
Signed-off-by: Alexandre Belloni 
Link: https://lore.kernel.org/r/20200226224322.187960-1-alexandre.belloni@bootlin.com
Signed-off-by: Greg Kroah-Hartman

tty: source all tty Kconfig files in one place

2020-03-12T16:17:30+00:00

'source' (include) all of the tty/*/Kconfig files from
drivers/tty/Kconfig instead of from drivers/char/Kconfig.
This consolidates them both in source code and in menu
presentation to the user.

Move hvc/Kconfig and serial/Kconfig 'source' lines into the
if TTY/endif block and remove the if TTY/endif blocks from
those 2 files.

Cc: linux-serial@vger.kernel.org
Cc: Jiri Slaby 
Cc: Greg Kroah-Hartman 
Cc: Arnd Bergmann 
Suggested-by: Jiri Slaby 
Suggested-by: Arnd Bergmann 
Acked-by: Arnd Bergmann 
Signed-off-by: Randy Dunlap 
Link: https://lore.kernel.org/r/20200311225736.32147-3-rdunlap@infradead.org
Signed-off-by: Greg Kroah-Hartman

char: group dev configs togther

2020-03-12T16:17:29+00:00

Group /dev/{mem,kmem,nvram,raw,port} driver configs together.
This also means that tty configs are now grouped together instead
of being split up.

This just moves Kconfig lines around. There are no other changes.

Cc: linux-serial@vger.kernel.org
Cc: Jiri Slaby 
Cc: Greg Kroah-Hartman 
Cc: Arnd Bergmann 
Acked-by: Arnd Bergmann 
Signed-off-by: Randy Dunlap 
Link: https://lore.kernel.org/r/20200311225736.32147-2-rdunlap@infradead.org
Signed-off-by: Greg Kroah-Hartman

random: Make RANDOM_TRUST_CPU depend on ARCH_RANDOM

2020-02-28T04:21:52+00:00

Listing the set of host architectures does not scale.
Depend instead on the existence of the architecture rng.

This will allow RANDOM_TRUST_CPU to be selected on arm64. Today
ARCH_RANDOM is only selected by x86, s390, and powerpc, so this does not
adversely affect other architectures.

Signed-off-by: Richard Henderson 
Signed-off-by: Mark Rutland 
Link: https://lore.kernel.org/r/20200210130015.17664-5-mark.rutland@arm.com
Signed-off-by: Theodore Ts'o

char: Fix Kconfig indentation

2019-11-20T14:09:48+00:00

Adjust indentation from spaces to tab (+optional two spaces) as in
coding style with command like:
	$ sed -e 's/^        /\t/' -i */Kconfig

Signed-off-by: Krzysztof Kozlowski 
Link: https://lore.kernel.org/r/20191120134247.16073-1-krzk@kernel.org
Signed-off-by: Greg Kroah-Hartman

Merge tag 'please-pull-ia64_for_5.4' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux

2019-09-16T22:32:01+00:00

Pull ia64 updates from Tony Luck:
 "The big change here is removal of support for SGI Altix"

* tag 'please-pull-ia64_for_5.4' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux: (33 commits)
  genirq: remove the is_affinity_mask_valid hook
  ia64: remove CONFIG_SWIOTLB ifdefs
  ia64: remove support for machvecs
  ia64: move the screen_info setup to common code
  ia64: move the ROOT_DEV setup to common code
  ia64: rework iommu probing
  ia64: remove the unused sn_coherency_id symbol
  ia64: remove the SGI UV simulator support
  ia64: remove the zx1 swiotlb machvec
  ia64: remove CONFIG_ACPI ifdefs
  ia64: remove CONFIG_PCI ifdefs
  ia64: remove the hpsim platform
  ia64: remove now unused machvec indirections
  ia64: remove support for the SGI SN2 platform
  drivers: remove the SGI SN2 IOC4 base support
  drivers: remove the SGI SN2 IOC3 base support
  qla2xxx: remove SGI SN2 support
  qla1280: remove SGI SN2 support
  misc/sgi-xp: remove SGI SN2 support
  char/mspec: remove SGI SN2 support
  ...

fdt: add support for rng-seed

2019-08-23T15:39:26+00:00

Introducing a chosen node, rng-seed, which is an entropy that can be
passed to kernel called very early to increase initial device
randomness. Bootloader should provide this entropy and the value is
read from /chosen/rng-seed in DT.

Obtain of_fdt_crc32 for CRC check after early_init_dt_scan_nodes(),
since early_init_dt_scan_chosen() would modify fdt to erase rng-seed.

Add a new interface add_bootloader_randomness() for rng-seed use case.
Depends on whether the seed is trustworthy, rng seed would be passed to
add_hwgenerator_randomness(). Otherwise it would be passed to
add_device_randomness(). Decision is controlled by kernel config
RANDOM_TRUST_BOOTLOADER.

Signed-off-by: Hsin-Yi Wang 
Reviewed-by: Stephen Boyd 
Reviewed-by: Rob Herring 
Reviewed-by: Theodore Ts'o  # drivers/char/random.c
Signed-off-by: Will Deacon

char: remove the SGI tiocx/mbcs driver

2019-08-16T18:33:56+00:00

The SGI SN2 support is about to be removed.  Remove this driver that
depends on the SN2 support.

Signed-off-by: Christoph Hellwig 
Link: https://lkml.kernel.org/r/20190813072514.23299-3-hch@lst.de
Signed-off-by: Tony Luck