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    SubjectRe: [PATCH 25/35] x86/cet/shstk: Add user-mode shadow stack support
    On 1/30/22 13:18, Rick Edgecombe wrote:
    > Add the user shadow stack MSRs to the xsave helpers, so they can be used
    > to implement the functionality.

    Do these MSRs ever affect kernel-mode operation?

    If so, we might need to switch them more aggressively at context-switch
    time like PKRU.

    If not, they can continue to be context-switched with the PASID state
    which does not affect kernel-mode operation.

    Either way, it would be nice to have some changelog material to that effect.

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