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powerpc/pseries: Support firmware disable of RFI flush

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commit 582605a429 upstream.

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

Fixes: 8989d56878 ("powerpc/pseries: Query hypervisor 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
2018-06-02 21:08:47 +10:00
committed by Greg Kroah-Hartman
parent 70e51fd51f
commit 51cbb3b34c
1 changed files with 2 additions and 1 deletions
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3
arch/powerpc/platforms/pseries/setup.c
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@@ -473,7 +473,8 @@ static void pseries_setup_rfi_flush(void)
if (types == L1D_FLUSH_NONE)
types = L1D_FLUSH_FALLBACK;
if (!(result.behaviour & H_CPU_BEHAV_L1D_FLUSH_PR))
if ((!(result.behaviour & H_CPU_BEHAV_L1D_FLUSH_PR)) ||
(!(result.behaviour & H_CPU_BEHAV_FAVOUR_SECURITY)))
enable = false;
} else {
/* Default to fallback if case hcall is not available */