[PATCH v3 00/25] OpenRISC patches for 4.11 final call

From: Stafford Horne
Date: Tue Feb 21 2017 - 14:14:07 EST

Hi All,

Changes from v2
o implemented all atomic ops pointed out by Peter Z
o export ioremap symbols pointed out by allyesconfig
o init r0 to 0 as per openrisc spec, suggested by Jakob Viketoft

Changes from v1
o added change set from Valentin catching CONFIG issues
o added missing test_and_change_bit atomic bitops patch

This is a attempt to get some final comments before I send the pull request
for this merge windot to Linus. This comes up due to last minute findings
by Peter Zijlstra with the atomic operations patch. If I get a bunch of
Nak's I will likely just skip this merge window, but lets hope that can be

Any feedback is appreciated.

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

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. I have mainly done the tests on qemu.

Note for testers:
The l.swa and l.lwa emulation + native instruction support is NOW FIXED in
qemu upstream git.

I have send patches for get a recent openrisc toolchain added to the
lkp-tests make.cross script. It should be up to date now I believe
this is what most build sytems use. Let me know if different.


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 (9):
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
openrisc: Export ioremap symbols used by modules
openrisc: head: Init r0 to 0 on start

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

Valentin Rothberg (1):
arch/openrisc/lib/memcpy.c: use correct OR1200 option

arch/openrisc/Kconfig | 1 +
arch/openrisc/TODO.openrisc | 1 -
arch/openrisc/include/asm/Kbuild | 5 +-
arch/openrisc/include/asm/atomic.h | 100 +++++++++++++
arch/openrisc/include/asm/bitops.h | 2 +-
arch/openrisc/include/asm/bitops/atomic.h | 123 +++++++++++++++
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 | 200 ++++++++++---------------
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 ++++++++++++
arch/openrisc/mm/ioremap.c | 2 +
scripts/checkstack.pl | 3 +
27 files changed, 1297 insertions(+), 188 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