From: Lai Jiangshan <jiangshanlai@gmail.com>
To: linux-kernel@vger.kernel.org
Cc: Borislav Petkov <bp@alien8.de>,
Peter Zijlstra <peterz@infradead.org>,
Josh Poimboeuf <jpoimboe@redhat.com>,
Andy Lutomirski <luto@kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
x86@kernel.org, Lai Jiangshan <jiangshan.ljs@antgroup.com>
Subject: [PATCH 0/7] x86/entry: Convert error_entry() to C code
Date: Wed, 11 May 2022 15:27:40 +0800 [thread overview]
Message-ID: <20220511072747.3960-1-jiangshanlai@gmail.com> (raw)
From: Lai Jiangshan <jiangshan.ljs@antgroup.com>
Add some C equivalent functions of the ASM macros and implement the whole
error_entry() as C code.
The patches are picked from the huge patchset
https://lore.kernel.org/lkml/20211126101209.8613-1-jiangshanlai@gmail.com/
which converts a large chunk of ASM code to C code.
The C version generally has better readability and easier to be
updated/improved.
This smaller patchset converts error_entry() only.
The equivalent ASM macros are not removed because they are still used by
the IST exceptions.
Changed from the old huge patchset:
squash some patches
Lai Jiangshan (7):
x86/entry: Introduce __entry_text for entry code written in C
x86/entry: Move PTI_USER_* to arch/x86/include/asm/processor-flags.h
x86: Mark __native_read_cr3() & native_write_cr3() as __always_inline
x86/entry: Add arch/x86/entry/entry64.c for C entry code
x86/entry: Add the C verion of SWITCH_TO_KERNEL_CR3 as
switch_to_kernel_cr3()
x86/traps: Add fence_swapgs_{user,kernel}_entry() and
user_entry_swapgs_and_fence()
x86/entry: Implement the whole error_entry() as C code
arch/x86/entry/Makefile | 3 +-
arch/x86/entry/calling.h | 10 --
arch/x86/entry/entry64.c | 137 +++++++++++++++++++++++++
arch/x86/entry/entry_64.S | 85 +--------------
arch/x86/include/asm/idtentry.h | 3 +
arch/x86/include/asm/pgtable.h | 23 +----
arch/x86/include/asm/processor-flags.h | 15 +++
arch/x86/include/asm/proto.h | 1 +
arch/x86/include/asm/special_insns.h | 4 +-
arch/x86/include/asm/traps.h | 1 +
arch/x86/kernel/traps.c | 2 -
include/linux/compiler_types.h | 8 +-
12 files changed, 172 insertions(+), 120 deletions(-)
create mode 100644 arch/x86/entry/entry64.c
--
2.19.1.6.gb485710b
next reply other threads:[~2022-05-11 7:27 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-11 7:27 Lai Jiangshan [this message]
2022-05-11 7:27 ` [PATCH 1/7] x86/entry: Introduce __entry_text for entry code written in C Lai Jiangshan
2022-05-11 18:01 ` Nick Desaulniers
2022-05-11 19:27 ` Miguel Ojeda
2022-05-11 19:34 ` Nick Desaulniers
2022-05-11 19:41 ` Miguel Ojeda
2022-05-11 20:09 ` Thomas Gleixner
2022-05-11 7:27 ` [PATCH 2/7] x86/entry: Move PTI_USER_* to arch/x86/include/asm/processor-flags.h Lai Jiangshan
2022-05-11 10:25 ` Thomas Gleixner
2022-05-11 12:40 ` Lai Jiangshan
2022-05-11 7:27 ` [PATCH 3/7] x86: Mark __native_read_cr3() & native_write_cr3() as __always_inline Lai Jiangshan
2022-05-11 7:27 ` [PATCH 4/7] x86/entry: Add arch/x86/entry/entry64.c for C entry code Lai Jiangshan
2022-05-11 7:27 ` [PATCH 5/7] x86/entry: Add the C verion of SWITCH_TO_KERNEL_CR3 as switch_to_kernel_cr3() Lai Jiangshan
2022-05-11 7:27 ` [PATCH 6/7] x86/traps: Add fence_swapgs_{user,kernel}_entry() and user_entry_swapgs_and_fence() Lai Jiangshan
2022-05-11 7:27 ` [PATCH 7/7] x86/entry: Implement the whole error_entry() as C code Lai Jiangshan
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