diff options
| author | Breno Leitao <leitao@debian.org> | 2024-09-13 05:27:53 -0700 |
|---|---|---|
| committer | Dave Hansen <dave.hansen@linux.intel.com> | 2024-09-30 10:30:54 -0700 |
| commit | 86e39b94cd71a4987f9b98dd2a7d6c826e1c5c98 (patch) | |
| tree | fac917cb093b70f345833f1c464200cd93c7093e | |
| parent | 9852d85ec9d492ebef56dc5f229416c925758edc (diff) | |
x86/bugs: Correct RSB terminology in Kconfig
RSB stands for "Return Stack Buffer" in industry literature[1]. Update
the kernel Kconfig to use this standard term instead of the current
"Return-Speculation-Buffer".
This change aligns kernel documentation with widely accepted terminology.
The line length reduction triggers text reformatting, but no functional
text is altered.
[1] https://www.intel.com/content/www/us/en/developer/articles/technical/software-security-guidance/advisory-guidance/return-stack-buffer-underflow.html
Signed-off-by: Breno Leitao <leitao@debian.org>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Acked-by: Dave Hansen <dave.hansen@linux.intel.com>
Link: https://lore.kernel.org/all/20240913122754.249306-1-leitao%40debian.org
| -rw-r--r-- | arch/x86/Kconfig | 17 |
1 files changed, 8 insertions, 9 deletions
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 2852fcd82cbd..2cea5f275602 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -2551,15 +2551,14 @@ config MITIGATION_CALL_DEPTH_TRACKING default y help Compile the kernel with call depth tracking to mitigate the Intel - SKL Return-Speculation-Buffer (RSB) underflow issue. The - mitigation is off by default and needs to be enabled on the - kernel command line via the retbleed=stuff option. For - non-affected systems the overhead of this option is marginal as - the call depth tracking is using run-time generated call thunks - in a compiler generated padding area and call patching. This - increases text size by ~5%. For non affected systems this space - is unused. On affected SKL systems this results in a significant - performance gain over the IBRS mitigation. + SKL Return-Stack-Buffer (RSB) underflow issue. The mitigation is off + by default and needs to be enabled on the kernel command line via the + retbleed=stuff option. For non-affected systems the overhead of this + option is marginal as the call depth tracking is using run-time + generated call thunks in a compiler generated padding area and call + patching. This increases text size by ~5%. For non affected systems + this space is unused. On affected SKL systems this results in a + significant performance gain over the IBRS mitigation. config CALL_THUNKS_DEBUG bool "Enable call thunks and call depth tracking debugging" |