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SubjectRe: [PATCH 0/3] x86/cpu: Fix SPECULATIVE_MITIGATION=n kernels
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On 4/9/24 10:51, Sean Christopherson wrote:
> Fix the handling of SPECULATION_MITIGATIONS=n so that it actually does
> what it says it does: disable any and all mitigations.
>
> And because I don't see a way to provide sane behavior for overriding
> SPECULATION_MITIGATIONS=n at runtime, explicitly disallow doing so via
> the "mitigations" kernel parameter, e.g. so that the user at least knows
> that their system is still likely vulnerable to a variety of issues.
>
> Sean Christopherson (3):
> x86/cpu: Actually turn off mitigations by default for
> SPECULATION_MITIGATIONS=n
> x86/cpu: Disable BHI mitigation by default when
> SPECULATION_MITIGATIONS=n
> x86/cpu: Ignore "mitigations" kernel parameter if
> SPECULATION_MITIGATIONS=n
>
> Documentation/admin-guide/kernel-parameters.txt | 3 +++
> arch/x86/Kconfig | 10 +++++++---
> arch/x86/kernel/cpu/bugs.c | 6 +++---
> kernel/cpu.c | 5 ++++-
> 4 files changed, 17 insertions(+), 7 deletions(-)
>
>
> base-commit: 2c71fdf02a95b3dd425b42f28fd47fb2b1d22702

Reviewed-by: Daniel Sneddon <daniel.sneddon@linux.intel.com>

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