diff options
| author | Michael Ellerman <mpe@ellerman.id.au> | 2018-05-26 14:27:42 +1000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-05-30 07:51:52 +0200 |
| commit | 7a62b0f64804b1987225377c2944a86f9db63f37 (patch) | |
| tree | 2b79dc76929e94e8433b6c907b826c72d18f211b /arch/powerpc/platforms/pseries/setup.c | |
| parent | 3bf1695bbb24a848f7b6258fb5e9725833d6ddc4 (diff) | |
powerpc/pseries: Use the security flags in pseries_setup_rfi_flush()
commit 2e4a16161fcd324b1f9bf6cb6856529f7eaf0689 upstream.
Now that we have the security flags we can simplify the code in
pseries_setup_rfi_flush() because the security flags have pessimistic
defaults.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/powerpc/platforms/pseries/setup.c')
| -rw-r--r-- | arch/powerpc/platforms/pseries/setup.c | 27 |
1 files changed, 12 insertions, 15 deletions
diff --git a/arch/powerpc/platforms/pseries/setup.c b/arch/powerpc/platforms/pseries/setup.c index 65b157a35161..ba0a36c577ca 100644 --- a/arch/powerpc/platforms/pseries/setup.c +++ b/arch/powerpc/platforms/pseries/setup.c @@ -501,30 +501,27 @@ void pseries_setup_rfi_flush(void) bool enable; long rc; - /* Enable by default */ - enable = true; - types = L1D_FLUSH_FALLBACK; - rc = plpar_get_cpu_characteristics(&result); - if (rc == H_SUCCESS) { + if (rc == H_SUCCESS) init_cpu_char_feature_flags(&result); - if (result.character & H_CPU_CHAR_L1D_FLUSH_TRIG2) - types |= L1D_FLUSH_MTTRIG; - if (result.character & H_CPU_CHAR_L1D_FLUSH_ORI30) - types |= L1D_FLUSH_ORI; - - if ((!(result.behaviour & H_CPU_BEHAV_L1D_FLUSH_PR)) || - (!(result.behaviour & H_CPU_BEHAV_FAVOUR_SECURITY))) - enable = false; - } - /* * We're the guest so this doesn't apply to us, clear it to simplify * handling of it elsewhere. */ security_ftr_clear(SEC_FTR_L1D_FLUSH_HV); + types = L1D_FLUSH_FALLBACK; + + if (security_ftr_enabled(SEC_FTR_L1D_FLUSH_TRIG2)) + types |= L1D_FLUSH_MTTRIG; + + if (security_ftr_enabled(SEC_FTR_L1D_FLUSH_ORI30)) + types |= L1D_FLUSH_ORI; + + enable = security_ftr_enabled(SEC_FTR_FAVOUR_SECURITY) && \ + security_ftr_enabled(SEC_FTR_L1D_FLUSH_PR); + setup_rfi_flush(types, enable); } |