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powerpc/powernv: Support firmware disable of RFI flush

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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>
This commit is contained in:
Michael Ellerman 2019-04-22 00:19:49 +10:00 • committed by Greg Kroah-Hartman
parent e1759aacdd
commit f93ae3415c
1 changed files with 4 additions and 0 deletions
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4
arch/powerpc/platforms/powernv/setup.c
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@ -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);
}