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| author | Michael Ellerman <mpe@ellerman.id.au> | 2019-04-11 14:46:17 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-04-17 09:36:42 +0300 |
| commit | ae361096d6857727275631d1d64bcd8fec2d8f25 (patch) | |
| tree | 38d44f4e213c682137ad2f54e241abad3cc2ecfd | |
| parent | e745d1518d7a3766841d06f7846d4217253817ed (diff) | |
| download | linux-ae361096d6857727275631d1d64bcd8fec2d8f25.tar.xz | |
powerpc/powernv: Query firmware for count cache flush settings
commit 99d54754d3d5f896a8f616b0b6520662bc99d66b upstream.
Look for fw-features properties to determine the appropriate settings
for the count cache flush, and then call the generic powerpc code to
set it up based on the security feature flags.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | arch/powerpc/platforms/powernv/setup.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/powernv/setup.c b/arch/powerpc/platforms/powernv/setup.c index 17203abf38e8..365e2b620201 100644 --- a/arch/powerpc/platforms/powernv/setup.c +++ b/arch/powerpc/platforms/powernv/setup.c @@ -77,6 +77,12 @@ static void init_fw_feat_flags(struct device_node *np) if (fw_feature_is("enabled", "fw-count-cache-disabled", np)) security_ftr_set(SEC_FTR_COUNT_CACHE_DISABLED); + if (fw_feature_is("enabled", "fw-count-cache-flush-bcctr2,0,0", np)) + security_ftr_set(SEC_FTR_BCCTR_FLUSH_ASSIST); + + if (fw_feature_is("enabled", "needs-count-cache-flush-on-context-switch", np)) + security_ftr_set(SEC_FTR_FLUSH_COUNT_CACHE); + /* * The features below are enabled by default, so we instead look to see * if firmware has *disabled* them, and clear them if so. @@ -123,6 +129,7 @@ static void pnv_setup_rfi_flush(void) security_ftr_enabled(SEC_FTR_L1D_FLUSH_HV)); setup_rfi_flush(type, enable); + setup_count_cache_flush(); } static void __init pnv_setup_arch(void) |