[PATCH 0/2] x86/bugs: Break down mitigations configurations

[Breno Leitao]

There is no way to compile a kernel today with some of the speculative
mitigations disabled. Even if the kernel has
CONFIG_SPECULATION_MITIGATIONS=n, some Intel mitigations, such as MDS, TAA,
MMIO are still enabled and can only be disabled using a kernel parameter.

This patchset creates a way to choose what to enable or disable, and,
get the mitigations disable if CONFIG_SPECULATION_MITIGATIONS is not
set, as the rest of other mitigations.

Also, we want to print a warning message letting users know that these
mitigations are disabled.

This is a follow up to this discussion: https://lkml.org/lkml/2023/6/12/798

Breno Leitao (3):
  x86/bugs: Create an option to disable MDS
  x86/bugs: Create an option to disable TAA
  x86/bugs: Create an option to disable MMIO vulnerability

 arch/x86/Kconfig           | 31 +++++++++++++++++++++++++++++++
 arch/x86/kernel/cpu/bugs.c | 23 +++++++++++++++++++----
 2 files changed, 50 insertions(+), 4 deletions(-)

-- 
2.34.1