x86/bugs: Clarify that syscall hardening isn't a BHI mitigation
commit 5f882f3b upstream. While syscall hardening helps prevent some BHI attacks, there's still other low-hanging fruit remaining. Don't classify it as a mitigation and make it clear that the system may still be vulnerable if it doesn't have a HW or SW mitigation enabled. Fixes: ec9404e4 ("x86/bhi: Add BHI mitigation knob") Signed-off-by:Josh Poimboeuf <jpoimboe@kernel.org> Signed-off-by:
Ingo Molnar <mingo@kernel.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Sean Christopherson <seanjc@google.com> Link: https://lore.kernel.org/r/b5951dae3fdee7f1520d5136a27be3bdfe95f88b.1712813475.git.jpoimboe@kernel.org Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
parent
e47d1cbd
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