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AMD processor microcode support added to -current

Contributed by rueda on 2023-07-23 from the filling-the-gaps dept.

Thanks to a series of commits by Jonathan Gray (jsg@), -current now
has support for microcode (updates) for AMD (amd64 and i386)
processors:

    CVSROOT:        /cvs
    Module name:    src
    Changes by:     jsg@cvs.openbsd.org     2023/07/21 21:46:09

    Modified files:
            usr.sbin/fw_update: patterns.c

    Log message:
    match AMD x86 CPUs in fw_update(8)
    ok deraadt@

    CVSROOT:        /cvs
    Module name:    src
    Changes by:     jsg@cvs.openbsd.org     2023/07/22 04:11:20

    Modified files:
            sys/arch/amd64/stand/boot: conf.c
            sys/arch/amd64/stand/cdboot: conf.c
            sys/arch/amd64/stand/efiboot: conf.c exec_i386.c
            sys/arch/amd64/stand/libsa: exec_i386.c
            sys/arch/amd64/stand/pxeboot: conf.c
            sys/arch/i386/stand/boot: conf.c
            sys/arch/i386/stand/cdboot: conf.c
            sys/arch/i386/stand/libsa: exec_i386.c
            sys/arch/i386/stand/pxeboot: conf.c

    Log message:
    BOOTARG_UCODE for AMD
    ok deraadt@

    CVSROOT:        /cvs
    Module name:    src
    Changes by:     jsg@cvs.openbsd.org     2023/07/22 19:46:37

    Modified files:
            sys/arch/amd64/amd64: ucode.c

    Log message:
    update AMD CPU microcode if a newer patch is available
    ok deraadt@

    CVSROOT:        /cvs
    Module name:    src
    Changes by:     jsg@cvs.openbsd.org     2023/07/22 20:59:53

    Modified files:
            sys/arch/i386/i386: ucode.c

    Log message:
    update AMD CPU microcode if a newer patch is available
    ok deraadt@

Stuart Henderson (sthen@) committed the firmware port:

    CVSROOT:        /cvs
    Module name:    ports
    Changes by:     sthen@cvs.openbsd.org   2023/07/21 17:51:51

    Log message:
        import ports/sysutils/firmware/amd, microcode update binaries for AMD CPUs.
        not yet used, but adding it now so we can more easily test update mechanisms.

        ok jsg@

        Status:

        Vendor Tag: sthen
        Release Tags:       sthen_20230722

        N ports/sysutils/firmware/amd/Makefile
        N ports/sysutils/firmware/amd/distinfo
        N ports/sysutils/firmware/amd/pkg/DESCR
        N ports/sysutils/firmware/amd/pkg/PLIST

        No conflicts created by this import

It's great to see support for the AMD side gaining equivalence with
that for Intel (for which support was added in 2018).

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