From: Andy Lutomirski <luto@kernel.org>
To: x86@kernel.org
Cc: LKML <linux-kernel@vger.kernel.org>,
"Krzysztof Mazur" <krzysiek@podlesie.net>,
"Krzysztof Olędzki" <ole@ans.pl>, "Arnd Bergmann" <arnd@arndb.de>,
"Andy Lutomirski" <luto@kernel.org>
Subject: [PATCH v2 0/4] x86/fpu: Reduce unnecessary FNINIT and MXCSR usage
Date: Tue, 19 Jan 2021 09:38:58 -0800 [thread overview]
Message-ID: <cover.1611077835.git.luto@kernel.org> (raw)
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
next reply other threads:[~2021-01-19 18:54 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-19 17:38 Andy Lutomirski [this message]
2021-01-19 17:38 ` [PATCH v2 1/4] x86/fpu: Add kernel_fpu_begin_mask() to selectively initialize state Andy Lutomirski
2021-01-19 19:34 ` Sean Christopherson
2021-01-20 11:53 ` Borislav Petkov
2021-01-20 12:19 ` Andy Lutomirski
2021-01-19 17:39 ` [PATCH v2 2/4] x86/mmx: Use KFPU_387 for MMX string operations Andy Lutomirski
2021-01-20 18:18 ` Borislav Petkov
2021-01-19 17:39 ` [PATCH v2 3/4] x86/fpu: Make the EFI FPU calling convention explicit Andy Lutomirski
2021-01-19 17:39 ` [PATCH v2 4/4] x86/fpu/64: Don't FNINIT in kernel_fpu_begin() Andy Lutomirski
2021-01-20 10:07 ` Peter Zijlstra
2021-01-20 18:28 ` Borislav Petkov
2021-01-20 7:51 ` [PATCH v2 0/4] x86/fpu: Reduce unnecessary FNINIT and MXCSR usage Krzysztof Olędzki
2021-01-21 5:03 ` Andy Lutomirski
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