Re: [PATCH RESEND] x86/speculation: Fix user-mode spectre-v2 protection with KERNEL_IBRS

On Mon, Feb 20, 2023 at 10:44:21AM -0800, KP Singh wrote:

No it cannot with IBRS which is really just KERNEL_IBRS enabled, we

See my other reply. The intent is there to be able to do it. What needs to be figured out now is *why* we said no STIBP with IBRS? Was it an omission or was there some intent behind it.