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Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

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Pull arm64 updates from Catalin Marinas:

 - Support for 32-bit tasks on asymmetric AArch32 systems (on top of the
   scheduler changes merged via the tip tree).

 - More entry.S clean-ups and conversion to C.

 - MTE updates: allow a preferred tag checking mode to be set per CPU
   (the overhead of synchronous mode is smaller for some CPUs than
   others); optimisations for kernel entry/exit path; optionally disable
   MTE on the kernel command line.

 - Kselftest improvements for SVE and signal handling, PtrAuth.

 - Fix unlikely race where a TLBI could use stale ASID on an ASID
   roll-over (found by inspection).

 - Miscellaneous fixes: disable trapping of PMSNEVFR_EL1 to higher
   exception levels; drop unnecessary sigdelsetmask() call in the
   signal32 handling; remove BUG_ON when failing to allocate SVE state
   (just signal the process); SYM_CODE annotations.

 - Other trivial clean-ups: use macros instead of magic numbers, remove
   redundant returns, typos.

* tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (56 commits)
  arm64: Do not trap PMSNEVFR_EL1
  arm64: mm: fix comment typo of pud_offset_phys()
  arm64: signal32: Drop pointless call to sigdelsetmask()
  arm64/sve: Better handle failure to allocate SVE register storage
  arm64: Document the requirement for SCR_EL3.HCE
  arm64: head: avoid over-mapping in map_memory
  arm64/sve: Add a comment documenting the binutils needed for SVE asm
  arm64/sve: Add some comments for sve_save/load_state()
  kselftest/arm64: signal: Add a TODO list for signal handling tests
  kselftest/arm64: signal: Add test case for SVE register state in signals
  kselftest/arm64: signal: Verify that signals can't change the SVE vector length
  kselftest/arm64: signal: Check SVE signal frame shows expected vector length
  kselftest/arm64: signal: Support signal frames with SVE register data
  kselftest/arm64: signal: Add SVE to the set of features we can check for
  arm64: replace in_irq() with in_hardirq()
  kselftest/arm64: pac: Fix skipping of tests on systems without PAC
  Documentation: arm64: describe asymmetric 32-bit support
  arm64: Remove logic to kill 32-bit tasks on 64-bit-only cores
  arm64: Hook up cmdline parameter to allow mismatched 32-bit EL0
  arm64: Advertise CPUs capable of running 32-bit applications in sysfs
  ...
This commit is contained in:
Linus Torvalds
2021-09-01 15:04:29 -07:00
parent bcfeebbff3 65266a7c6a
commit 57c78a234e
69 changed files with 1842 additions and 463 deletions
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14
Documentation/admin-guide/kernel-parameters.txt
View File

@@ -287,6 +287,17 @@
do not want to use tracing_snapshot_alloc() as it needs
to be done where GFP_KERNEL allocations are allowed.
allow_mismatched_32bit_el0 [ARM64]
Allow execve() of 32-bit applications and setting of the
PER_LINUX32 personality on systems where only a strict
subset of the CPUs support 32-bit EL0. When this
parameter is present, the set of CPUs supporting 32-bit
EL0 is indicated by /sys/devices/system/cpu/aarch32_el0
and hot-unplug operations may be restricted.
See Documentation/arm64/asymmetric-32bit.rst for more
information.
amd_iommu= [HW,X86-64]
Pass parameters to the AMD IOMMU driver in the system.
Possible values are:
@@ -380,6 +391,9 @@
arm64.nopauth [ARM64] Unconditionally disable Pointer Authentication
support
arm64.nomte [ARM64] Unconditionally disable Memory Tagging Extension
support
ataflop= [HW,M68k]
atarimouse= [HW,MOUSE] Atari Mouse