linux-toradex.git/arch/hexagon, branch v6.7

Merge tag 'tty-6.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty

2023-11-04T01:44:25+00:00

Pull tty and serial updates from Greg KH:
 "Here is the big set of tty/serial driver changes for 6.7-rc1. Included
  in here are:

   - console/vgacon cleanups and removals from Arnd

   - tty core and n_tty cleanups from Jiri

   - lots of 8250 driver updates and cleanups

   - sc16is7xx serial driver updates

   - dt binding updates

   - first set of port lock wrapers from Thomas for the printk fixes
     coming in future releases

   - other small serial and tty core cleanups and updates

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

* tag 'tty-6.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (193 commits)
  serdev: Replace custom code with device_match_acpi_handle()
  serdev: Simplify devm_serdev_device_open() function
  serdev: Make use of device_set_node()
  tty: n_gsm: add copyright Siemens Mobility GmbH
  tty: n_gsm: fix race condition in status line change on dead connections
  serial: core: Fix runtime PM handling for pending tx
  vgacon: fix mips/sibyte build regression
  dt-bindings: serial: drop unsupported samsung bindings
  tty: serial: samsung: drop earlycon support for unsupported platforms
  tty: 8250: Add note for PX-835
  tty: 8250: Fix IS-200 PCI ID comment
  tty: 8250: Add Brainboxes Oxford Semiconductor-based quirks
  tty: 8250: Add support for Intashield IX cards
  tty: 8250: Add support for additional Brainboxes PX cards
  tty: 8250: Fix up PX-803/PX-857
  tty: 8250: Fix port count of PX-257
  tty: 8250: Add support for Intashield IS-100
  tty: 8250: Add support for Brainboxes UP cards
  tty: 8250: Add support for additional Brainboxes UC cards
  tty: 8250: Remove UC-257 and UC-431
  ...

hexagon: Remove unusable symbols from the ptrace.h uapi

2023-10-25T13:54:24+00:00

Kernel-internal prototypes, references to current_thread_info()
and code hidden behind a CONFIG_HEXAGON_ARCH_VERSION switch are
certainly not usable in userspace, so this should not reside
in a uapi header. Move the code into an internal version of
ptrace.h instead.

Signed-off-by: Thomas Huth 
Signed-off-by: Arnd Bergmann

vgacon, arch/*: remove unused screen_info definitions

2023-10-17T08:17:02+00:00

A number of architectures either kept the screen_info definition for
historical purposes as it used to be required by the generic VT code, or
they copied it from another architecture in order to build the VGA console
driver in an allmodconfig build. The mips definition is used by some
platforms, but the initialization on jazz is not needed.

Now that vgacon no longer builds on these architectures, remove the
stale definitions and initializations.

Reviewed-by: Javier Martinez Canillas 
Reviewed-by: Thomas Zimmermann 
Reviewed-by: Philippe Mathieu-Daudé 
Acked-by: Dinh Nguyen 
Acked-by: Max Filippov 
Acked-by: Palmer Dabbelt 
Acked-by: Guo Ren 
Acked-by: Helge Deller 
Signed-off-by: Arnd Bergmann 
Link: https://lore.kernel.org/r/20231009211845.3136536-5-arnd@kernel.org
Signed-off-by: Greg Kroah-Hartman

Merge tag 'x86_shstk_for_6.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2023-08-31T19:20:12+00:00

Pull x86 shadow stack support from Dave Hansen:
 "This is the long awaited x86 shadow stack support, part of Intel's
  Control-flow Enforcement Technology (CET).

  CET consists of two related security features: shadow stacks and
  indirect branch tracking. This series implements just the shadow stack
  part of this feature, and just for userspace.

  The main use case for shadow stack is providing protection against
  return oriented programming attacks. It works by maintaining a
  secondary (shadow) stack using a special memory type that has
  protections against modification. When executing a CALL instruction,
  the processor pushes the return address to both the normal stack and
  to the special permission shadow stack. Upon RET, the processor pops
  the shadow stack copy and compares it to the normal stack copy.

  For more information, refer to the links below for the earlier
  versions of this patch set"

Link: https://lore.kernel.org/lkml/20220130211838.8382-1-rick.p.edgecombe@intel.com/
Link: https://lore.kernel.org/lkml/20230613001108.3040476-1-rick.p.edgecombe@intel.com/

* tag 'x86_shstk_for_6.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (47 commits)
  x86/shstk: Change order of __user in type
  x86/ibt: Convert IBT selftest to asm
  x86/shstk: Don't retry vm_munmap() on -EINTR
  x86/kbuild: Fix Documentation/ reference
  x86/shstk: Move arch detail comment out of core mm
  x86/shstk: Add ARCH_SHSTK_STATUS
  x86/shstk: Add ARCH_SHSTK_UNLOCK
  x86: Add PTRACE interface for shadow stack
  selftests/x86: Add shadow stack test
  x86/cpufeatures: Enable CET CR4 bit for shadow stack
  x86/shstk: Wire in shadow stack interface
  x86: Expose thread features in /proc/$PID/status
  x86/shstk: Support WRSS for userspace
  x86/shstk: Introduce map_shadow_stack syscall
  x86/shstk: Check that signal frame is shadow stack mem
  x86/shstk: Check that SSP is aligned on sigreturn
  x86/shstk: Handle signals for shadow stack
  x86/shstk: Introduce routines modifying shstk
  x86/shstk: Handle thread shadow stack
  x86/shstk: Add user-mode shadow stack support
  ...

Merge tag 'mm-nonmm-stable-2023-08-28-22-48' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

2023-08-29T21:53:51+00:00

Pull non-MM updates from Andrew Morton:

 - An extensive rework of kexec and crash Kconfig from Eric DeVolder
   ("refactor Kconfig to consolidate KEXEC and CRASH options")

 - kernel.h slimming work from Andy Shevchenko ("kernel.h: Split out a
   couple of macros to args.h")

 - gdb feature work from Kuan-Ying Lee ("Add GDB memory helper
   commands")

 - vsprintf inclusion rationalization from Andy Shevchenko
   ("lib/vsprintf: Rework header inclusions")

 - Switch the handling of kdump from a udev scheme to in-kernel
   handling, by Eric DeVolder ("crash: Kernel handling of CPU and memory
   hot un/plug")

 - Many singleton patches to various parts of the tree

* tag 'mm-nonmm-stable-2023-08-28-22-48' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (81 commits)
  document while_each_thread(), change first_tid() to use for_each_thread()
  drivers/char/mem.c: shrink character device's devlist[] array
  x86/crash: optimize CPU changes
  crash: change crash_prepare_elf64_headers() to for_each_possible_cpu()
  crash: hotplug support for kexec_load()
  x86/crash: add x86 crash hotplug support
  crash: memory and CPU hotplug sysfs attributes
  kexec: exclude elfcorehdr from the segment digest
  crash: add generic infrastructure for crash hotplug support
  crash: move a few code bits to setup support of crash hotplug
  kstrtox: consistently use _tolower()
  kill do_each_thread()
  nilfs2: fix WARNING in mark_buffer_dirty due to discarded buffer reuse
  scripts/bloat-o-meter: count weak symbol sizes
  treewide: drop CONFIG_EMBEDDED
  lockdep: fix static memory detection even more
  lib/vsprintf: declare no_hash_pointers in sprintf.h
  lib/vsprintf: split out sprintf() and friends
  kernel/fork: stop playing lockless games for exe_file replacement
  adfs: delete unused "union adfs_dirtail" definition
  ...

mm: rationalise flush_icache_pages() and flush_icache_page()

2023-08-24T23:20:25+00:00

Move the default (no-op) implementation of flush_icache_pages() to
 from .  Remove the
flush_icache_page() wrapper from each architecture into
.

Link: https://lkml.kernel.org/r/20230802151406.3735276-32-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) 
Signed-off-by: Andrew Morton

hexagon: implement the new page table range API

2023-08-24T23:20:20+00:00

Add PFN_PTE_SHIFT and update_mmu_cache_range().

Link: https://lkml.kernel.org/r/20230802151406.3735276-13-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) 
Acked-by: Brian Cain 
Acked-by: Mike Rapoport (IBM) 
Signed-off-by: Andrew Morton

treewide: drop CONFIG_EMBEDDED

2023-08-21T20:46:25+00:00

There is only one Kconfig user of CONFIG_EMBEDDED and it can be switched
to EXPERT or "if !ARCH_MULTIPLATFORM" (suggested by Arnd).

Link: https://lkml.kernel.org/r/20230816055010.31534-1-rdunlap@infradead.org
Signed-off-by: Randy Dunlap 
Acked-by: Geert Uytterhoeven 
Acked-by: Arnd Bergmann 
Acked-by: Palmer Dabbelt 	[RISC-V]
Acked-by: Greg Ungerer 
Acked-by: Jason A. Donenfeld 
Acked-by: Michael Ellerman 	[powerpc]
Cc: Russell King 
Cc: Vineet Gupta 
Cc: Brian Cain 
Cc: Michal Simek 
Cc: Thomas Bogendoerfer 
Cc: Dinh Nguyen 
Cc: Jonas Bonn 
Cc: Stefan Kristiansson 
Cc: Stafford Horne 
Cc: Nicholas Piggin 
Cc: Christophe Leroy 
Cc: Paul Walmsley 
Cc: Albert Ou 
Cc: Yoshinori Sato 
Cc: Rich Felker 
Cc: John Paul Adrian Glaubitz 
Cc: Max Filippov 
Cc: Josh Triplett 
Cc: Masahiro Yamada 
Signed-off-by: Andrew Morton

hexagon: convert __pte_free_tlb() to use ptdescs

2023-08-21T20:37:56+00:00

Part of the conversions to replace pgtable constructor/destructors with
ptdesc equivalents.

Link: https://lkml.kernel.org/r/20230807230513.102486-21-vishal.moola@gmail.com
Signed-off-by: Vishal Moola (Oracle) 
Acked-by: Mike Rapoport (IBM) 
Cc: Arnd Bergmann 
Cc: Catalin Marinas 
Cc: Christophe Leroy 
Cc: Claudio Imbrenda 
Cc: Dave Hansen 
Cc: David Hildenbrand 
Cc: "David S. Miller" 
Cc: Dinh Nguyen 
Cc: Geert Uytterhoeven 
Cc: Geert Uytterhoeven 
Cc: Guo Ren 
Cc: Huacai Chen 
Cc: Hugh Dickins 
Cc: John Paul Adrian Glaubitz 
Cc: Jonas Bonn 
Cc: Matthew Wilcox 
Cc: Palmer Dabbelt 
Cc: Paul Walmsley 
Cc: Richard Weinberger 
Cc: Thomas Bogendoerfer 
Cc: Yoshinori Sato 
Signed-off-by: Andrew Morton

hexagon: mm: convert to GENERIC_IOREMAP

2023-08-18T17:12:32+00:00

By taking GENERIC_IOREMAP method, the generic ioremap_prot() and iounmap()
are visible and available to arch.  This change will simplify
implementation by removing duplicated code with generic ioremap_prot() and
iounmap(), and has the equivalent functioality.

For hexagon, the current ioremap() and iounmap() are the same as generic
version.  After taking GENERIC_IOREMAP way, the old ioremap() and
iounmap() can be completely removed.

Link: https://lkml.kernel.org/r/20230706154520.11257-3-bhe@redhat.com
Signed-off-by: Baoquan He 
Cc: Brian Cain 
Cc: Alexander Gordeev 
Cc: Arnd Bergmann 
Cc: Catalin Marinas 
Cc: Christian Borntraeger 
Cc: Christophe Leroy 
Cc: Christoph Hellwig 
Cc: Chris Zankel 
Cc: David Laight 
Cc: Geert Uytterhoeven 
Cc: Gerald Schaefer 
Cc: Heiko Carstens 
Cc: Helge Deller 
Cc: "James E.J. Bottomley" 
Cc: John Paul Adrian Glaubitz 
Cc: Jonas Bonn 
Cc: Kefeng Wang 
Cc: Matthew Wilcox 
Cc: Max Filippov 
Cc: Michael Ellerman 
Cc: Mike Rapoport (IBM) 
Cc: Nathan Chancellor 
Cc: Nicholas Piggin 
Cc: Niklas Schnelle 
Cc: Rich Felker 
Cc: Stafford Horne 
Cc: Stefan Kristiansson 
Cc: Sven Schnelle 
Cc: Vasily Gorbik 
Cc: Vineet Gupta 
Cc: Will Deacon 
Cc: Yoshinori Sato 
Signed-off-by: Andrew Morton