linux-kernel - [PATCH 0/4] csky: Use generic asid function from arm

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Date:   Wed, 19 Jun 2019 15:49:09 +0800
From:   guoren@...nel.org
To:     julien.grall@....com, arnd@...db.de, linux-kernel@...r.kernel.org
Cc:     linux-csky@...r.kernel.org, Guo Ren <ren_guo@...ky.com>
Subject: [PATCH 0/4] csky: Use generic asid function from arm

From: Guo Ren <ren_guo@...ky.com>

Julien Grall plan to seperate asid allocator into generic and vmid and
other architectures could use it.

ref:
https://lore.kernel.org/linux-arm-kernel/20190321163623.20219-1-julien.grall@arm.com/

For C-SKY the first implementation is from mips and it's not implemented
well for SMP in performance. Arm's asid allocator is right for us and
we've tested it in our all CPUs:610/807/810/860 and it really reduce the
tlb flush. We'll continue stress testing before merge into master.

It's good for all architectures in linux and let's continue the work.

@Julien
 Could you give a seperate patch for add generic asid ?

Guo Ren (4):
  csky: Revert mmu ASID mechanism
  arch: Add generic asid implement from arm
  csky: Use generic asid algorithm to implement switch_mm
  csky: Improve tlb operation with help of asid

 arch/csky/abiv1/inc/abi/ckmmu.h     |   6 +
 arch/csky/abiv2/inc/abi/ckmmu.h     |  10 ++
 arch/csky/include/asm/asid.h        |  77 ++++++++++++
 arch/csky/include/asm/mmu.h         |   2 +-
 arch/csky/include/asm/mmu_context.h | 114 ++---------------
 arch/csky/include/asm/pgtable.h     |   2 -
 arch/csky/kernel/smp.c              |   2 -
 arch/csky/mm/Makefile               |   2 +
 arch/csky/mm/asid.c                 | 185 ++++++++++++++++++++++++++++
 arch/csky/mm/context.c              |  46 +++++++
 arch/csky/mm/init.c                 |   2 -
 arch/csky/mm/tlb.c                  | 238 ++++++++++++++----------------------
 12 files changed, 434 insertions(+), 252 deletions(-)
 create mode 100644 arch/csky/include/asm/asid.h
 create mode 100644 arch/csky/mm/asid.c
 create mode 100644 arch/csky/mm/context.c

-- 
2.7.4