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| author |   Michael Ellerman <mpe@ellerman.id.au> | 2018-07-24 01:07:56 +1000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2018-08-08 00:32:27 +1000 |
| commit | 99d54754d3d5f896a8f616b0b6520662bc99d66b (patch) | |
| tree | ea94521127a98989dcc9884e731f2f663c51eb0a | |
| parent | powerpc/pseries: Query hypervisor for count cache flush settings (diff) | |
| download | linux-dev-99d54754d3d5f896a8f616b0b6520662bc99d66b.tar.xz linux-dev-99d54754d3d5f896a8f616b0b6520662bc99d66b.zip | |
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>
| -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 3fc25304af38..adddde023622 100644 --- a/arch/powerpc/platforms/powernv/setup.c +++ b/arch/powerpc/platforms/powernv/setup.c @@ -78,6 +78,12 @@ 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. @@ -124,6 +130,7 @@ 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) |