linux-kernel - [RFC v2 0/2] PPC: Add generic FPU api similar to x86

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Date:   Wed, 21 Jul 2021 00:47:59 -0400
From:   Anson Jacob <Anson.Jacob@....com>
To:     <mpe@...erman.id.au>, <benh@...nel.crashing.org>,
        <paulus@...ba.org>, <christophe.leroy@...roup.eu>,
        <linuxppc-dev@...ts.ozlabs.org>, <amd-gfx@...ts.freedesktop.org>,
        <linux-kernel@...r.kernel.org>
CC:     <Harry.Wentland@....com>, <Sunpeng.Li@....com>,
        <Bhawanpreet.Lakha@....com>, <Rodrigo.Siqueira@....com>,
        <Aurabindo.Pillai@....com>, <qingqing.zhuo@....com>,
        <bindu.r@....com>, <roman.li@....com>, <Anson.Jacob@....com>
Subject: [RFC v2 0/2] PPC: Add generic FPU api similar to x86

This is an attempt to have generic FPU enable/disable
calls similar to x86. 
So that we can simplify gpu/drm/amd/display/dc/os_types.h

Also adds FPU correctness logic seen in x86.

v2:
- Added asm/fpu/api.h powerpc variant with kernel_fpu_begin/end()
  and kernel_fpu_enabled() declarations
- Updated kernel_fpu_enabled as EXPORT_SYMBOL_GPL
- Got rid of macro switch for PPC in dc/os_types.h as header file
  with same name as x86 is added by previous patch in the series

Anson Jacob (2):
  ppc/fpu: Add generic FPU api similar to x86
  drm/amd/display: Use PPC FPU functions

 arch/powerpc/include/asm/fpu/api.h        |  18 +++
 arch/powerpc/include/asm/switch_to.h      |  25 +----
 arch/powerpc/kernel/process.c             | 130 ++++++++++++++++++++++
 drivers/gpu/drm/amd/display/dc/os_types.h |  29 -----
 4 files changed, 151 insertions(+), 51 deletions(-)
 create mode 100644 arch/powerpc/include/asm/fpu/api.h

-- 
2.25.1