Commit 5d758cf4 authored by Michael Ellerman's avatar Michael Ellerman Committed by Greg Kroah-Hartman

powerpc/powernv: Query firmware for count cache flush settings

commit 99d54754 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: 's avatarMichael Ellerman <mpe@ellerman.id.au>
Signed-off-by: 's avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 05cc3eb6
......@@ -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)
......
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