[Bug 291768] bhyve won't boot anything on 15.0 - AMD EPYC 9124

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=291768

--- Comment #44 from commit-hook@FreeBSD.org ---
A commit in branch main references this bug:

URL:
https://cgit.FreeBSD.org/src/commit/?id=ef26f64c11220ea303de16d088c585f9d2908b0f

commit ef26f64c11220ea303de16d088c585f9d2908b0f
Author:     ShengYi Hung <aokblast@FreeBSD.org>
AuthorDate: 2026-09-11 08:22:39 +0000
Commit:     Mark Johnston <markj@FreeBSD.org>
CommitDate: 2026-09-11 13:01:44 +0000

    amd64/pmap: Return la57 in amd nested page

    AMD doesn't encode page depth in eptp. As a result, the page level is
    decided by the host la57 value. Without this, it uses 4 level page and
    therefore cause machine enable la57 have garbage page translation.

    PR:             291768
    Reviewed by:    kib
    Tested by:      Antranig Vartanian <antranigv@freebsd.am>
    MFC after:      1 week
    Differential Revision:  https://reviews.freebsd.org/D57978

 sys/amd64/amd64/pmap.c | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

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