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.
Breno Leitao (2):
x86/speculation: Disable mitigations if CONFIG says so
x86/speculation: Print error when mitigations are disabled
arch/x86/kernel/cpu/bugs.c | 29 ++++++++++++++++++++++++-----
1 file changed, 24 insertions(+), 5 deletions(-)
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2.34.1