[PATCH 00/22] Openrisc patchees from backlog for 4.11

From: Stafford Horne
Date: Sat Jan 14 2017 - 18:09:15 EST


Hi All,

This is another set of patches which I have been pulling out of the
openrisc backlogs. Its a bit of a process since I need to cleanup commit
messages, review and test the patches.

The interesting things here are:
- optimized memset and memcpy routines, ~20% boot time saving
- support for cpu idling
- adding support for l.swa and l.lwa atomic operations (in spec from 2014)
- use atomics to implement: bitops, cmpxchg, futex, spinlocks
- the atomics are in preparation for SMP support

Testing:
I have used the kselftests to validate the changes especially the futex
operations with the futex test. Other atomic operations are common so no
explicit testing.

Note for testers:
The l.swa and l.lwa emulation is broken in qemu openrisc port. I have sent
patches [1] to qemu-devel to fix the qemu issues.

[1] lists.nongnu.org/archive/html/qemu-devel/2017-01/msg02764.html

Jonas Bonn (1):
openrisc: use SPARSE_IRQ

Olof Kindgren (1):
openrisc: Add optimized memset

Sebastian Macke (2):
openrisc: Fix the bitmask for the unit present register
openrisc: Initial support for the idle state

Stafford Horne (7):
openrisc: Add optimized memcpy routine
openrisc: Add .gitignore
MAINTAINERS: Add the openrisc official repository
scripts/checkstack.pl: Add openrisc support
openrisc: entry: Whitespace and comment cleanups
openrisc: entry: Fix delay slot detection
openrisc: head: Move init strings to rodata section

Stefan Kristiansson (11):
openrisc: add cache way information to cpuinfo
openrisc: tlb miss handler optimizations
openrisc: head: use THREAD_SIZE instead of magic constant
openrisc: head: refactor out tlb flush into it's own function
openrisc: add l.lwa/l.swa emulation
openrisc: add atomic bitops
openrisc: add cmpxchg and xchg implementations
openrisc: add optimized atomic operations
openrisc: add spinlock implementation
openrisc: add futex_atomic_* implementations
openrisc: remove unnecessary stddef.h include

MAINTAINERS | 1 +
arch/openrisc/Kconfig | 1 +
arch/openrisc/TODO.openrisc | 1 -
arch/openrisc/include/asm/Kbuild | 5 +-
arch/openrisc/include/asm/atomic.h | 53 +++++++
arch/openrisc/include/asm/bitops.h | 2 +-
arch/openrisc/include/asm/bitops/atomic.h | 103 +++++++++++++
arch/openrisc/include/asm/cmpxchg.h | 82 ++++++++++
arch/openrisc/include/asm/cpuinfo.h | 2 +
arch/openrisc/include/asm/futex.h | 135 +++++++++++++++++
arch/openrisc/include/asm/spinlock.h | 232 ++++++++++++++++++++++++++++-
arch/openrisc/include/asm/spinlock_types.h | 28 ++++
arch/openrisc/include/asm/spr_defs.h | 4 +-
arch/openrisc/include/asm/string.h | 10 ++
arch/openrisc/kernel/.gitignore | 1 +
arch/openrisc/kernel/entry.S | 60 +++++---
arch/openrisc/kernel/head.S | 195 +++++++++---------------
arch/openrisc/kernel/or32_ksyms.c | 1 +
arch/openrisc/kernel/process.c | 17 +++
arch/openrisc/kernel/ptrace.c | 1 -
arch/openrisc/kernel/setup.c | 67 +++++----
arch/openrisc/kernel/traps.c | 183 +++++++++++++++++++++++
arch/openrisc/lib/Makefile | 2 +-
arch/openrisc/lib/memcpy.c | 124 +++++++++++++++
arch/openrisc/lib/memset.S | 98 ++++++++++++
scripts/checkstack.pl | 3 +
26 files changed, 1224 insertions(+), 187 deletions(-)
create mode 100644 arch/openrisc/include/asm/atomic.h
create mode 100644 arch/openrisc/include/asm/bitops/atomic.h
create mode 100644 arch/openrisc/include/asm/cmpxchg.h
create mode 100644 arch/openrisc/include/asm/futex.h
create mode 100644 arch/openrisc/include/asm/spinlock_types.h
create mode 100644 arch/openrisc/include/asm/string.h
create mode 100644 arch/openrisc/kernel/.gitignore
create mode 100644 arch/openrisc/lib/memcpy.c
create mode 100644 arch/openrisc/lib/memset.S

--
2.9.3