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    Subject[PATCH 4.9 26/61] powerpc/powernv: Support firmware disable of RFI flush
    Date
    4.9-stable review patch.  If anyone has any objections, please let me know.

    ------------------

    From: Michael Ellerman <mpe@ellerman.id.au>

    commit eb0a2d2620ae431c543963c8c7f08f597366fc60 upstream.

    Some versions of firmware will have a setting that can be configured
    to disable the RFI flush, add support for it.

    Fixes: 6e032b350cd1 ("powerpc/powernv: Check device-tree for RFI flush settings")
    Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    ---
    arch/powerpc/platforms/powernv/setup.c | 4 ++++
    1 file changed, 4 insertions(+)

    --- a/arch/powerpc/platforms/powernv/setup.c
    +++ b/arch/powerpc/platforms/powernv/setup.c
    @@ -79,6 +79,10 @@ static void pnv_setup_rfi_flush(void)
    if (np && of_property_read_bool(np, "disabled"))
    enable--;

    + np = of_get_child_by_name(fw_features, "speculation-policy-favor-security");
    + if (np && of_property_read_bool(np, "disabled"))
    + enable = 0;
    +
    of_node_put(np);
    of_node_put(fw_features);
    }

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