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    SubjectRe: [PATCH 2/3] x86/speculation: Support Automatic IBRS
    On 11/5/22 6:39 AM, David Laight wrote:
    > From: Borislav Petkov
    >> Sent: 04 November 2022 21:52
    >>
    >> On Fri, Nov 04, 2022 at 04:36:50PM -0500, Kim Phillips wrote:
    >>> - Allow for spectre_v2=autoibrs in the kernel command line,
    >>> reverting to auto-selection if the feature isn't available.
    >>
    >> Why?
    >>
    >> What the whole logic here should do is enable autoibrs when detected
    >> automatically, without the need for the user to even select it as it is
    >> the superior mitigation.
    >
    > The only useful option is to allow a different option be
    > selected for code testing.
    > So maybe you want an option for completeness - for when
    > an 'even better' option is available.

    This is true.

    Kim

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