linux-kernel - [PATCH v2 0/8] powerpc/vdso32 enhancement and optimisation

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Message-Id: <cover.1566491310.git.christophe.leroy@c-s.fr>
Date:   Thu, 22 Aug 2019 16:34:00 +0000 (UTC)
From:   Christophe Leroy <christophe.leroy@....fr>
To:     Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>
Cc:     linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org
Subject: [PATCH v2 0/8] powerpc/vdso32 enhancement and optimisation

This series:
- adds getcpu()
- adds coarse clocks in clock_gettime
- fixes and adds all clocks in clock_getres
- optimises the retrieval of the datapage address
- optimises the cache functions

It puts together the three patches sent out earlier allthought they
were not presented as a series, hence the 'v2' tag for now.

v2:
- Used named labels in patch 2
- Added patch from Vincenzo to fix clock_getres() (patch 3)
- Removed unnecessary label in patch 4 as suggested by Segher
- Added patches 5 to 8

Christophe Leroy (8):
  powerpc/32: Add VDSO version of getcpu
  powerpc/vdso32: Add support for CLOCK_{REALTIME/MONOTONIC}_COARSE
  powerpc: Fix vDSO clock_getres()
  powerpc/vdso32: inline __get_datapage()
  powerpc/vdso32: Don't read cache line size from the datapage on PPC32.
  powerpc/vdso32: use LOAD_REG_IMMEDIATE()
  powerpc/vdso32: implement clock_getres entirely
  powerpc/vdso32: miscellaneous optimisations

 arch/powerpc/include/asm/vdso.h           |   2 +
 arch/powerpc/include/asm/vdso_datapage.h  |   6 +-
 arch/powerpc/kernel/asm-offsets.c         |   7 +-
 arch/powerpc/kernel/head_32.h             |  13 ++++
 arch/powerpc/kernel/head_booke.h          |  11 +++
 arch/powerpc/kernel/time.c                |   1 +
 arch/powerpc/kernel/vdso.c                |   5 --
 arch/powerpc/kernel/vdso32/Makefile       |   4 +-
 arch/powerpc/kernel/vdso32/cacheflush.S   |  33 ++++++--
 arch/powerpc/kernel/vdso32/datapage.S     |  32 ++------
 arch/powerpc/kernel/vdso32/datapage.h     |  11 +++
 arch/powerpc/kernel/vdso32/getcpu.S       |  13 +++-
 arch/powerpc/kernel/vdso32/gettimeofday.S | 125 +++++++++++++++++++++---------
 arch/powerpc/kernel/vdso32/vdso32.lds.S   |   2 -
 arch/powerpc/kernel/vdso64/gettimeofday.S |   7 +-
 15 files changed, 183 insertions(+), 89 deletions(-)
 create mode 100644 arch/powerpc/kernel/vdso32/datapage.h

-- 
2.13.3