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* [PATCH 00/37] MIPS: barriers & atomics cleanups
@ 2019-09-30 23:08 Paul Burton
  2019-09-30 23:08 ` [PATCH 01/37] MIPS: Unify sc beqz definition Paul Burton
                   ` (36 more replies)
  0 siblings, 37 replies; 38+ messages in thread
From: Paul Burton @ 2019-09-30 23:08 UTC (permalink / raw)
  To: linux-mips; +Cc: Huacai Chen, Jiaxun Yang, linux-kernel, Paul Burton

This series consists of a bunch of cleanups to the way we handle memory
barriers (though no changes to the sync instructions we use to implement
them) & atomic memory accesses. One major goal was to ensure the
Loongson3 LL/SC errata workarounds are applied in a safe manner from
within inline-asm & that we can automatically verify the resulting
kernel binary looks reasonable. Many patches are cleanups found along
the way.

Applies atop v5.4-rc1.

Paul Burton (37):
  MIPS: Unify sc beqz definition
  MIPS: Use compact branch for LL/SC loops on MIPSr6+
  MIPS: barrier: Add __SYNC() infrastructure
  MIPS: barrier: Clean up rmb() & wmb() definitions
  MIPS: barrier: Clean up __smp_mb() definition
  MIPS: barrier: Remove fast_mb() Octeon #ifdef'ery
  MIPS: barrier: Clean up __sync() definition
  MIPS: barrier: Clean up sync_ginv()
  MIPS: atomic: Fix whitespace in ATOMIC_OP macros
  MIPS: atomic: Handle !kernel_uses_llsc first
  MIPS: atomic: Use one macro to generate 32b & 64b functions
  MIPS: atomic: Emit Loongson3 sync workarounds within asm
  MIPS: atomic: Use _atomic barriers in atomic_sub_if_positive()
  MIPS: atomic: Unify 32b & 64b sub_if_positive
  MIPS: atomic: Deduplicate 32b & 64b read, set, xchg, cmpxchg
  MIPS: bitops: Use generic builtin ffs/fls; drop cpu_has_clo_clz
  MIPS: bitops: Handle !kernel_uses_llsc first
  MIPS: bitops: Only use ins for bit 16 or higher
  MIPS: bitops: Use MIPS_ISA_REV, not #ifdefs
  MIPS: bitops: ins start position is always an immediate
  MIPS: bitops: Implement test_and_set_bit() in terms of _lock variant
  MIPS: bitops: Allow immediates in test_and_{set,clear,change}_bit
  MIPS: bitops: Use the BIT() macro
  MIPS: bitops: Avoid redundant zero-comparison for non-LLSC
  MIPS: bitops: Abstract LL/SC loops
  MIPS: bitops: Use BIT_WORD() & BITS_PER_LONG
  MIPS: bitops: Emit Loongson3 sync workarounds within asm
  MIPS: bitops: Use smp_mb__before_atomic in test_* ops
  MIPS: cmpxchg: Emit Loongson3 sync workarounds within asm
  MIPS: cmpxchg: Omit redundant barriers for Loongson3
  MIPS: futex: Emit Loongson3 sync workarounds within asm
  MIPS: syscall: Emit Loongson3 sync workarounds within asm
  MIPS: barrier: Remove loongson_llsc_mb()
  MIPS: barrier: Make __smp_mb__before_atomic() a no-op for Loongson3
  MIPS: genex: Add Loongson3 LL/SC workaround to ejtag_debug_handler
  MIPS: genex: Don't reload address unnecessarily
  MIPS: Check Loongson3 LL/SC errata workaround correctness

 arch/mips/Makefile                            |   2 +-
 arch/mips/Makefile.postlink                   |  10 +-
 arch/mips/include/asm/atomic.h                | 571 ++++++-----------
 arch/mips/include/asm/barrier.h               | 215 +------
 arch/mips/include/asm/bitops.h                | 593 ++++--------------
 arch/mips/include/asm/cmpxchg.h               |  59 +-
 arch/mips/include/asm/cpu-features.h          |  10 -
 arch/mips/include/asm/futex.h                 |   9 +-
 arch/mips/include/asm/llsc.h                  |  19 +-
 .../asm/mach-malta/cpu-feature-overrides.h    |   2 -
 arch/mips/include/asm/sync.h                  | 207 ++++++
 arch/mips/kernel/genex.S                      |   6 +-
 arch/mips/kernel/pm-cps.c                     |  20 +-
 arch/mips/kernel/syscall.c                    |   3 +-
 arch/mips/lib/bitops.c                        |  57 +-
 arch/mips/loongson64/Platform                 |   2 +-
 arch/mips/tools/.gitignore                    |   1 +
 arch/mips/tools/Makefile                      |   5 +
 arch/mips/tools/loongson3-llsc-check.c        | 307 +++++++++
 19 files changed, 975 insertions(+), 1123 deletions(-)
 create mode 100644 arch/mips/include/asm/sync.h
 create mode 100644 arch/mips/tools/loongson3-llsc-check.c

-- 
2.23.0


^ permalink raw reply	[flat|nested] 38+ messages in thread
end of thread, other threads:[~2019-09-30 23:10 UTC | newest]

Thread overview: 38+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-09-30 23:08 [PATCH 00/37] MIPS: barriers & atomics cleanups Paul Burton
2019-09-30 23:08 ` [PATCH 01/37] MIPS: Unify sc beqz definition Paul Burton
2019-09-30 23:08 ` [PATCH 02/37] MIPS: Use compact branch for LL/SC loops on MIPSr6+ Paul Burton
2019-09-30 23:08 ` [PATCH 03/37] MIPS: barrier: Add __SYNC() infrastructure Paul Burton
2019-09-30 23:08 ` [PATCH 04/37] MIPS: barrier: Clean up rmb() & wmb() definitions Paul Burton
2019-09-30 23:08 ` [PATCH 05/37] MIPS: barrier: Clean up __smp_mb() definition Paul Burton
2019-09-30 23:08 ` [PATCH 06/37] MIPS: barrier: Remove fast_mb() Octeon #ifdef'ery Paul Burton
2019-09-30 23:08 ` [PATCH 07/37] MIPS: barrier: Clean up __sync() definition Paul Burton
2019-09-30 23:08 ` [PATCH 08/37] MIPS: barrier: Clean up sync_ginv() Paul Burton
2019-09-30 23:08 ` [PATCH 09/37] MIPS: atomic: Fix whitespace in ATOMIC_OP macros Paul Burton
2019-09-30 23:08 ` [PATCH 11/37] MIPS: atomic: Use one macro to generate 32b & 64b functions Paul Burton
2019-09-30 23:08 ` [PATCH 10/37] MIPS: atomic: Handle !kernel_uses_llsc first Paul Burton
2019-09-30 23:08 ` [PATCH 12/37] MIPS: atomic: Emit Loongson3 sync workarounds within asm Paul Burton
2019-09-30 23:08 ` [PATCH 13/37] MIPS: atomic: Use _atomic barriers in atomic_sub_if_positive() Paul Burton
2019-09-30 23:08 ` [PATCH 14/37] MIPS: atomic: Unify 32b & 64b sub_if_positive Paul Burton
2019-09-30 23:08 ` [PATCH 15/37] MIPS: atomic: Deduplicate 32b & 64b read, set, xchg, cmpxchg Paul Burton
2019-09-30 23:08 ` [PATCH 17/37] MIPS: bitops: Handle !kernel_uses_llsc first Paul Burton
2019-09-30 23:08 ` [PATCH 16/37] MIPS: bitops: Use generic builtin ffs/fls; drop cpu_has_clo_clz Paul Burton
2019-09-30 23:08 ` [PATCH 18/37] MIPS: bitops: Only use ins for bit 16 or higher Paul Burton
2019-09-30 23:08 ` [PATCH 19/37] MIPS: bitops: Use MIPS_ISA_REV, not #ifdefs Paul Burton
2019-09-30 23:08 ` [PATCH 20/37] MIPS: bitops: ins start position is always an immediate Paul Burton
2019-09-30 23:08 ` [PATCH 21/37] MIPS: bitops: Implement test_and_set_bit() in terms of _lock variant Paul Burton
2019-09-30 23:08 ` [PATCH 22/37] MIPS: bitops: Allow immediates in test_and_{set,clear,change}_bit Paul Burton
2019-09-30 23:08 ` [PATCH 23/37] MIPS: bitops: Use the BIT() macro Paul Burton
2019-09-30 23:08 ` [PATCH 24/37] MIPS: bitops: Avoid redundant zero-comparison for non-LLSC Paul Burton
2019-09-30 23:08 ` [PATCH 25/37] MIPS: bitops: Abstract LL/SC loops Paul Burton
2019-09-30 23:08 ` [PATCH 26/37] MIPS: bitops: Use BIT_WORD() & BITS_PER_LONG Paul Burton
2019-09-30 23:08 ` [PATCH 27/37] MIPS: bitops: Emit Loongson3 sync workarounds within asm Paul Burton
2019-09-30 23:08 ` [PATCH 28/37] MIPS: bitops: Use smp_mb__before_atomic in test_* ops Paul Burton
2019-09-30 23:08 ` [PATCH 29/37] MIPS: cmpxchg: Emit Loongson3 sync workarounds within asm Paul Burton
2019-09-30 23:08 ` [PATCH 30/37] MIPS: cmpxchg: Omit redundant barriers for Loongson3 Paul Burton
2019-09-30 23:08 ` [PATCH 31/37] MIPS: futex: Emit Loongson3 sync workarounds within asm Paul Burton
2019-09-30 23:08 ` [PATCH 32/37] MIPS: syscall: " Paul Burton
2019-09-30 23:08 ` [PATCH 33/37] MIPS: barrier: Remove loongson_llsc_mb() Paul Burton
2019-09-30 23:08 ` [PATCH 34/37] MIPS: barrier: Make __smp_mb__before_atomic() a no-op for Loongson3 Paul Burton
2019-09-30 23:08 ` [PATCH 35/37] MIPS: genex: Add Loongson3 LL/SC workaround to ejtag_debug_handler Paul Burton
2019-09-30 23:08 ` [PATCH 36/37] MIPS: genex: Don't reload address unnecessarily Paul Burton
2019-09-30 23:08 ` [PATCH 37/37] MIPS: Check Loongson3 LL/SC errata workaround correctness Paul Burton

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