linux-kernel - Re: [PATCH v8 0/8] powerpc: switch VDSO to C implementation

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Message-ID: <438ce3d7-aa0f-0284-7518-6c6339742aab@csgroup.eu>
Date:   Fri, 29 May 2020 20:56:57 +0200
From:   Christophe Leroy <christophe.leroy@...roup.eu>
To:     Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>, nathanl@...ux.ibm.com
Cc:     linux-arch@...r.kernel.org, arnd@...db.de,
        linux-kernel@...r.kernel.org, luto@...nel.org, tglx@...utronix.de,
        vincenzo.frascino@....com, linuxppc-dev@...ts.ozlabs.org
Subject: Re: [PATCH v8 0/8] powerpc: switch VDSO to C implementation

Hi Michael,

Le 28/04/2020 à 15:16, Christophe Leroy a écrit :
> This is the seventh version of a series to switch powerpc VDSO to
> generic C implementation.
> 
> Main changes since v7 are:
> - Added gettime64 on PPC32
> 
> This series applies on today's powerpc/merge branch.
> 
> See the last patches for details on changes and performance.

Do you have any plans for this series ?

Even if you don't feel like merging it this cycle, I think patches 1 to 
3 are worth it.

Christophe

> 
> Christophe Leroy (8):
>    powerpc/vdso64: Switch from __get_datapage() to get_datapage inline
>      macro
>    powerpc/vdso: Remove __kernel_datapage_offset and simplify
>      __get_datapage()
>    powerpc/vdso: Remove unused \tmp param in __get_datapage()
>    powerpc/processor: Move cpu_relax() into asm/vdso/processor.h
>    powerpc/vdso: Prepare for switching VDSO to generic C implementation.
>    powerpc/vdso: Switch VDSO to generic C implementation.
>    lib/vdso: force inlining of __cvdso_clock_gettime_common()
>    powerpc/vdso: Provide __kernel_clock_gettime64() on vdso32
> 
>   arch/powerpc/Kconfig                         |   2 +
>   arch/powerpc/include/asm/clocksource.h       |   7 +
>   arch/powerpc/include/asm/processor.h         |  10 +-
>   arch/powerpc/include/asm/vdso/clocksource.h  |   7 +
>   arch/powerpc/include/asm/vdso/gettimeofday.h | 175 +++++++++++
>   arch/powerpc/include/asm/vdso/processor.h    |  23 ++
>   arch/powerpc/include/asm/vdso/vsyscall.h     |  25 ++
>   arch/powerpc/include/asm/vdso_datapage.h     |  50 ++--
>   arch/powerpc/kernel/asm-offsets.c            |  49 +--
>   arch/powerpc/kernel/time.c                   |  91 +-----
>   arch/powerpc/kernel/vdso.c                   |  58 +---
>   arch/powerpc/kernel/vdso32/Makefile          |  32 +-
>   arch/powerpc/kernel/vdso32/cacheflush.S      |   2 +-
>   arch/powerpc/kernel/vdso32/config-fake32.h   |  34 +++
>   arch/powerpc/kernel/vdso32/datapage.S        |   7 +-
>   arch/powerpc/kernel/vdso32/gettimeofday.S    | 300 +------------------
>   arch/powerpc/kernel/vdso32/vdso32.lds.S      |   8 +-
>   arch/powerpc/kernel/vdso32/vgettimeofday.c   |  35 +++
>   arch/powerpc/kernel/vdso64/Makefile          |  23 +-
>   arch/powerpc/kernel/vdso64/cacheflush.S      |   9 +-
>   arch/powerpc/kernel/vdso64/datapage.S        |  31 +-
>   arch/powerpc/kernel/vdso64/gettimeofday.S    | 243 +--------------
>   arch/powerpc/kernel/vdso64/vdso64.lds.S      |   7 +-
>   arch/powerpc/kernel/vdso64/vgettimeofday.c   |  29 ++
>   lib/vdso/gettimeofday.c                      |   2 +-
>   25 files changed, 460 insertions(+), 799 deletions(-)
>   create mode 100644 arch/powerpc/include/asm/clocksource.h
>   create mode 100644 arch/powerpc/include/asm/vdso/clocksource.h
>   create mode 100644 arch/powerpc/include/asm/vdso/gettimeofday.h
>   create mode 100644 arch/powerpc/include/asm/vdso/processor.h
>   create mode 100644 arch/powerpc/include/asm/vdso/vsyscall.h
>   create mode 100644 arch/powerpc/kernel/vdso32/config-fake32.h
>   create mode 100644 arch/powerpc/kernel/vdso32/vgettimeofday.c
>   create mode 100644 arch/powerpc/kernel/vdso64/vgettimeofday.c
>