mirror of https://gitee.com/openkylin/linux.git
powerpc/powernv: Query firmware for count cache flush settings
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>
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@ -78,6 +78,12 @@ static void init_fw_feat_flags(struct device_node *np)
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if (fw_feature_is("enabled", "fw-count-cache-disabled", np))
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security_ftr_set(SEC_FTR_COUNT_CACHE_DISABLED);
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if (fw_feature_is("enabled", "fw-count-cache-flush-bcctr2,0,0", np))
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security_ftr_set(SEC_FTR_BCCTR_FLUSH_ASSIST);
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if (fw_feature_is("enabled", "needs-count-cache-flush-on-context-switch", np))
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security_ftr_set(SEC_FTR_FLUSH_COUNT_CACHE);
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/*
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* The features below are enabled by default, so we instead look to see
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* if firmware has *disabled* them, and clear them if so.
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@ -124,6 +130,7 @@ static void pnv_setup_rfi_flush(void)
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security_ftr_enabled(SEC_FTR_L1D_FLUSH_HV));
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setup_rfi_flush(type, enable);
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setup_count_cache_flush();
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}
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static void __init pnv_setup_arch(void)
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