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    Subject[PATCH V2 6/8] x86/platform/uv: Decode UVsystab Info
    Decode the hubless UVsystab passed from BIOS to the kernel saving
    pertinent info in a similar manner that hubbed UVsystabs are decoded.

    Signed-off-by: Mike Travis <mike.travis@hpe.com>
    Reviewed-by: Steve Wahl <steve.wahl@hpe.com>
    Reviewed-by: Dimitri Sivanich <dimitri.sivanich@hpe.com>
    ---
    V2: Removed redundant error message after call to uv_bios_init.
    Removed redundant error message after call to decode_uv_systab.
    Clarify selection of UV4 and higher when checking for extended UVsystab
    in decode_uv_systab().
    ---
    arch/x86/kernel/apic/x2apic_uv_x.c | 12 ++++++++++--
    1 file changed, 10 insertions(+), 2 deletions(-)

    --- linux.orig/arch/x86/kernel/apic/x2apic_uv_x.c
    +++ linux/arch/x86/kernel/apic/x2apic_uv_x.c
    @@ -1303,7 +1303,8 @@ static int __init decode_uv_systab(void)
    struct uv_systab *st;
    int i;

    - if (uv_hub_info->hub_revision < UV4_HUB_REVISION_BASE)
    + /* If system is uv3 or lower, there is no extended UVsystab */
    + if (is_uv_hubbed(0xfffffe) < uv(4) && is_uv_hubless(0xfffffe) < uv(4))
    return 0; /* No extended UVsystab required */

    st = uv_systab;
    @@ -1554,8 +1555,15 @@ static __init int uv_system_init_hubless

    /* Init kernel/BIOS interface */
    rc = uv_bios_init();
    + if (rc < 0)
    + return rc;

    - /* Create user access node if UVsystab available */
    + /* Process UVsystab */
    + rc = decode_uv_systab();
    + if (rc < 0)
    + return rc;
    +
    + /* Create user access node */
    if (rc >= 0)
    uv_setup_proc_files(1);

    --

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