Re: [PATCH v2 1/6] x86/bugs: Move the X86_FEATURE_USE_IBPB check into callers

Sean Christopherson
2025-02-27T01:41:23Z

On Thu, Feb 27, 2025, Yosry Ahmed wrote:
> indirect_branch_prediction_barrier() only performs the MSR write if
> X86_FEATURE_USE_IBPB is set, using alternative_msr_write(). In
> preparation for removing X86_FEATURE_USE_IBPB, move the feature check
> into the callers so that they can be addressed one-by-one, and use
> X86_FEATURE_IBPB instead to guard the MSR write.
>
> Signed-off-by: Yosry Ahmed <yosry.ahmed@linux.dev>
> Acked-by: Josh Poimboeuf <jpoimboe@kernel.org>
> ---

Acked-by: Sean Christopherson <seanjc@google.com>