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| author | Michael Ellerman <mpe@ellerman.id.au> | 2018-07-24 01:07:55 +1000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2018-08-08 00:32:26 +1000 |
| commit | ba72dc171954b782a79d25e0f4b3ed91090c3b1e (patch) | |
| tree | b453a0e9f72a00c0fb2730fe0bf24c853befe8ef /arch/powerpc/platforms/pseries/setup.c | |
| parent | ee13cb249fabdff8b90aaff61add347749280087 (diff) | |
| download | linux-ba72dc171954b782a79d25e0f4b3ed91090c3b1e.tar.bz2 | |
powerpc/pseries: Query hypervisor for count cache flush settings
Use the existing hypercall 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>
Diffstat (limited to 'arch/powerpc/platforms/pseries/setup.c')
| -rw-r--r-- | arch/powerpc/platforms/pseries/setup.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/pseries/setup.c b/arch/powerpc/platforms/pseries/setup.c index 08f0c5de5b09..395cfe320141 100644 --- a/arch/powerpc/platforms/pseries/setup.c +++ b/arch/powerpc/platforms/pseries/setup.c @@ -501,6 +501,12 @@ static void init_cpu_char_feature_flags(struct h_cpu_char_result *result) if (result->character & H_CPU_CHAR_COUNT_CACHE_DISABLED) security_ftr_set(SEC_FTR_COUNT_CACHE_DISABLED); + if (result->character & H_CPU_CHAR_BCCTR_FLUSH_ASSIST) + security_ftr_set(SEC_FTR_BCCTR_FLUSH_ASSIST); + + if (result->behaviour & H_CPU_BEHAV_FLUSH_COUNT_CACHE) + 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. @@ -551,6 +557,7 @@ void pseries_setup_rfi_flush(void) security_ftr_enabled(SEC_FTR_L1D_FLUSH_PR); setup_rfi_flush(types, enable); + setup_count_cache_flush(); } #ifdef CONFIG_PCI_IOV |