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powerpc/pseries: Support firmware disable of RFI flush

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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>
This commit is contained in:
Michael Ellerman 2018-02-22 23:58:49 +11:00
parent 2f7d03e051
commit 582605a429
1 changed files with 2 additions and 1 deletions
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3
arch/powerpc/platforms/pseries/setup.c
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@ -482,7 +482,8 @@ 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 */