x86/fpu: Reduce unnecessary FNINIT and MXCSR usage
Status from this message: The following commit has been merged into the x86/urgent branch of tip:
Get series with b4
b4 am [email protected]Versions newest first · linked by author and title
- v3 Latest4 patches 2 repliesApplied
- v24 patches 8 repliesSuperseded
- v14 patches 5 repliesSuperseded
Changes in v3 from the cover letter
- Tidy up the if statements (Sean)
- Changelog and comment improvements (Boris)
Patches in v3 Applied
| # | Subject and files | Size | Replies | Applied |
|---|---|---|---|---|
| 1/4 | x86/fpu: Add kernel_fpu_begin_mask() to selectively initialize statearch/ arch/ | +18 | 0 replies | |
| 2/4 | x86/mmx: Use KFPU_387 for MMX string operationsarch/ | +15 | 1 reply | |
| 3/4 | x86/fpu: Make the EFI FPU calling convention explicitarch/ arch/ | +22 | 0 replies | |
| 4/4 | x86/fpu/64: Don't FNINIT in kernel_fpu_begin()arch/ | +12 | 0 replies |
Reviews trailers per patch
None of the 4 patches has a Reviewed-by or Acked-by.
| Patch | Krzysztof Piotr Olędzki | Krzysztof Mazur |
|---|---|---|
| Series | T-b | |
| 1/4 | ||
| 2/4 | T-b | |
| 3/4 | ||
| 4/4 |
Trailers given in replies are filled; those carried in the patches from earlier versions are outlined with dashes.
Cover letter [PATCH v3 0/4] x86/fpu: Reduce unnecessary FNINIT and MXCSR usage
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 v2:
- Tidy up the if statements (Sean)
- Changelog and comment improvements (Boris)
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 | 9 +++++---- arch/x86/lib/mmx_32.c | 20 +++++++++++++++----- arch/x86/platform/efi/efi_64.c | 4 ++-- 5 files changed, 67 insertions(+), 17 deletions(-)
Signature · 1 line
2.29.2