From: Kees Cook <keescook@chromium.org>
To: Lai Jiangshan <jiangshanlai@gmail.com>
Cc: linux-kernel@vger.kernel.org,
Lai Jiangshan <laijs@linux.alibaba.com>,
Nathan Chancellor <nathan@kernel.org>,
Miguel Ojeda <ojeda@kernel.org>,
Nick Desaulniers <ndesaulniers@google.com>,
"Peter Zijlstra (Intel)" <peterz@infradead.org>,
Sami Tolvanen <samitolvanen@google.com>,
Masahiro Yamada <masahiroy@kernel.org>,
Marco Elver <elver@google.com>, Arnd Bergmann <arnd@arndb.de>,
Ard Biesheuvel <ardb@kernel.org>
Subject: Re: [PATCH V2 03/41] compiler_types.h: Add __noinstr_section() for noinstr
Date: Mon, 27 Sep 2021 11:09:35 -0700 [thread overview]
Message-ID: <202109271107.F02E36105@keescook> (raw)
In-Reply-To: <20210926150838.197719-4-jiangshanlai@gmail.com>
On Sun, Sep 26, 2021 at 11:08:00PM +0800, Lai Jiangshan wrote:
> From: Lai Jiangshan <laijs@linux.alibaba.com>
>
> And it will be extended for C entry code.
>
> Signed-off-by: Lai Jiangshan <laijs@linux.alibaba.com>
> ---
> include/linux/compiler_types.h | 6 ++++--
> 1 file changed, 4 insertions(+), 2 deletions(-)
>
> diff --git a/include/linux/compiler_types.h b/include/linux/compiler_types.h
> index b6ff83a714ca..3c77631c68bd 100644
> --- a/include/linux/compiler_types.h
> +++ b/include/linux/compiler_types.h
> @@ -208,10 +208,12 @@ struct ftrace_likely_data {
> #endif
>
> /* Section for code which can't be instrumented at all */
> -#define noinstr \
> - noinline notrace __attribute((__section__(".noinstr.text"))) \
> +#define __noinstr_section(section) \
bikeshed: this could be just __noinstr(section) instead
of __noinstr_section(section) just to avoid semi-redundant
information. *shrug*
Reviewed-by: Kees Cook <keescook@chromium.org>
> + noinline notrace __attribute((__section__(section))) \
> __no_kcsan __no_sanitize_address __no_profile __no_sanitize_coverage
>
> +#define noinstr __noinstr_section(".noinstr.text")
> +
> #endif /* __KERNEL__ */
>
> #endif /* __ASSEMBLY__ */
> --
> 2.19.1.6.gb485710b
>
--
Kees Cook
next prev parent reply other threads:[~2021-09-27 18:09 UTC|newest]
Thread overview: 54+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-26 15:07 [PATCH V2 00/41] x86/entry/64: Convert a bunch of ASM entry code into C code Lai Jiangshan
2021-09-26 15:07 ` [PATCH V2 01/41] x86/entry: Fix swapgs fence Lai Jiangshan
2021-09-26 20:43 ` Thomas Gleixner
2021-09-27 1:10 ` Lai Jiangshan
2021-09-27 3:27 ` Lai Jiangshan
2021-09-27 7:50 ` Thomas Gleixner
2021-09-26 15:07 ` [PATCH V2 02/41] x86/traps: Remove stack-protector from traps.c Lai Jiangshan
2021-09-27 10:19 ` Borislav Petkov
2021-09-27 10:49 ` Lai Jiangshan
2021-09-27 11:01 ` Borislav Petkov
2021-09-27 14:38 ` Lai Jiangshan
2021-09-26 15:08 ` [PATCH V2 03/41] compiler_types.h: Add __noinstr_section() for noinstr Lai Jiangshan
2021-09-27 18:09 ` Kees Cook [this message]
2021-09-26 15:08 ` [PATCH V2 04/41] x86/entry: Introduce __entry_text for entry code written in C Lai Jiangshan
2021-09-30 11:49 ` Borislav Petkov
2021-09-26 15:08 ` [PATCH V2 05/41] x86/entry: Move PTI_USER_* to arch/x86/include/asm/processor-flags.h Lai Jiangshan
2021-09-26 15:08 ` [PATCH V2 06/41] x86: Mark __native_read_cr3() & native_write_cr3() as __always_inline Lai Jiangshan
2021-09-26 15:08 ` [PATCH V2 07/41] x86/traps: Move the declaration of native_irq_return_iret into proto.h Lai Jiangshan
2021-09-26 15:08 ` [PATCH V2 08/41] x86/entry: Add arch/x86/entry/entry64.c for C entry code Lai Jiangshan
2021-09-26 15:08 ` [PATCH V2 09/41] x86/entry: Expose the address of .Lgs_change to entry64.c Lai Jiangshan
2021-09-26 15:08 ` [PATCH V2 10/41] x86/entry: Add C verion of SWITCH_TO_KERNEL_CR3 as switch_to_kernel_cr3() Lai Jiangshan
2021-09-26 15:08 ` [PATCH V2 11/41] x86/entry: Add C user_entry_swapgs_and_fence() and kernel_entry_fence_no_swapgs() Lai Jiangshan
2021-09-26 15:08 ` [PATCH V2 12/41] x86/traps: Move pt_regs only in fixup_bad_iret() Lai Jiangshan
2021-09-26 15:08 ` [PATCH V2 13/41] x86/entry: Switch the stack after error_entry() returns Lai Jiangshan
2021-09-26 15:08 ` [PATCH V2 14/41] x86/entry: move PUSH_AND_CLEAR_REGS out of error_entry Lai Jiangshan
2021-09-26 15:08 ` [PATCH V2 15/41] objtool: Allow .entry.text function using CLD instruction Lai Jiangshan
2021-09-26 15:08 ` [PATCH V2 16/41] x86/entry: Implement the whole error_entry() as C code Lai Jiangshan
2021-09-28 21:34 ` Brian Gerst
2021-09-29 8:45 ` Peter Zijlstra
2021-09-26 15:08 ` [PATCH V2 17/41] x86/entry: Make paranoid_exit() callable Lai Jiangshan
2021-09-26 15:08 ` [PATCH V2 18/41] x86/entry: Call paranoid_exit() in asm_exc_nmi() Lai Jiangshan
2021-09-26 15:08 ` [PATCH V2 19/41] x86/entry: move PUSH_AND_CLEAR_REGS out of paranoid_entry Lai Jiangshan
2021-09-26 15:08 ` [PATCH V2 20/41] x86/entry: Add the C version ist_switch_to_kernel_cr3() Lai Jiangshan
2021-09-26 15:08 ` [PATCH V2 21/41] x86/entry: Add the C version ist_restore_cr3() Lai Jiangshan
2021-09-26 15:08 ` [PATCH V2 22/41] x86/entry: Add the C version get_percpu_base() Lai Jiangshan
2021-09-26 15:08 ` [PATCH V2 23/41] x86/entry: Add the C version ist_switch_to_kernel_gsbase() Lai Jiangshan
2021-09-26 15:08 ` [PATCH V2 24/41] x86/entry: Implement the C version ist_paranoid_entry() Lai Jiangshan
2021-09-26 15:08 ` [PATCH V2 25/41] x86/entry: Implement the C version ist_paranoid_exit() Lai Jiangshan
2021-09-26 15:08 ` [PATCH V2 26/41] x86/entry: Add a C macro to define the function body for IST in .entry.text Lai Jiangshan
2021-09-26 15:08 ` [PATCH V2 27/41] x86/mce: Remove stack protector from mce/core.c Lai Jiangshan
2021-09-26 15:08 ` [PATCH V2 28/41] x86/debug, mce: Use C entry code Lai Jiangshan
2021-09-26 15:08 ` [PATCH V2 29/41] x86/idtentry.h: Move the definitions *IDTENTRY_{MCE|DEBUG}* up Lai Jiangshan
2021-09-26 15:08 ` [PATCH V2 30/41] x86/nmi: Use DEFINE_IDTENTRY_NMI for nmi Lai Jiangshan
2021-09-26 15:08 ` [PATCH V2 31/41] x86/nmi: Remove stack protector from nmi.c Lai Jiangshan
2021-09-26 15:08 ` [PATCH V2 32/41] x86/nmi: Use C entry code Lai Jiangshan
2021-09-26 15:08 ` [PATCH V2 33/41] x86/entry: Add a C macro to define the function body for IST in .entry.text with an error code Lai Jiangshan
2021-09-26 15:08 ` [PATCH V2 34/41] x86/doublefault: Use C entry code Lai Jiangshan
2021-09-26 15:08 ` [PATCH V2 35/41] x86/sev: Add and use ist_vc_switch_off_ist() Lai Jiangshan
2021-09-26 15:08 ` [PATCH V2 36/41] x86/sev: Remove stack protector from sev.c Lai Jiangshan
2021-09-26 15:08 ` [PATCH V2 37/41] x86/sev: Use C entry code Lai Jiangshan
2021-09-26 15:08 ` [PATCH V2 38/41] x86/entry: Remove ASM function paranoid_entry() and paranoid_exit() Lai Jiangshan
2021-09-26 15:08 ` [PATCH V2 39/41] x86/entry: Remove the unused ASM macros Lai Jiangshan
2021-09-26 15:08 ` [PATCH V2 40/41] x86/entry: Remove save_ret from PUSH_AND_CLEAR_REGS Lai Jiangshan
2021-09-26 15:08 ` [PATCH V2 41/41] x86/syscall/64: Move the checking for sysret to C code Lai Jiangshan
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