lkml.org 
[lkml]   [2021]   [Jan]   [19]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Subject[PATCH v2 0/4] x86/fpu: Reduce unnecessary FNINIT and MXCSR usage
Date
This series fixes two regressions: a boot failure on AMD K7 and a
performance regression on everything.

I did a double-take here -- the regressions were reported by different
people, both named Krzysztof :)

Changes from v1:
- Fix MMX better -- MMX really does need FNINIT.
- Improve the EFI code.
- Rename the KFPU constants.
- Changelog improvements.

Andy Lutomirski (4):
x86/fpu: Add kernel_fpu_begin_mask() to selectively initialize state
x86/mmx: Use KFPU_387 for MMX string operations
x86/fpu: Make the EFI FPU calling convention explicit
x86/fpu/64: Don't FNINIT in kernel_fpu_begin()

arch/x86/include/asm/efi.h | 24 ++++++++++++++++++++----
arch/x86/include/asm/fpu/api.h | 27 +++++++++++++++++++++++++--
arch/x86/kernel/fpu/core.c | 17 +++++++++++------
arch/x86/lib/mmx_32.c | 20 +++++++++++++++-----
arch/x86/platform/efi/efi_64.c | 4 ++--
5 files changed, 73 insertions(+), 19 deletions(-)

--
2.29.2

\
 
 \ /
  Last update: 2021-01-19 19:55    [W:0.310 / U:0.152 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site