diff options
| author | Nicholas Piggin <npiggin@gmail.com> | 2021-05-03 23:02:40 +1000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2021-06-21 21:13:19 +1000 |
| commit | 65c7d070850e109a8a75a431f5a7f6eb4c007b77 (patch) | |
| tree | b2776c8cfd06b6370b2f5313e205239b1ea51623 /arch/powerpc/platforms/pseries | |
| parent | 710e682286784b50b882fc4befdf83c587059211 (diff) | |
powerpc/pseries: Get entry and uaccess flush required bits from H_GET_CPU_CHARACTERISTICS
This allows the hypervisor / firmware to describe these workarounds to
the guest.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20210503130243.891868-2-npiggin@gmail.com
Diffstat (limited to 'arch/powerpc/platforms/pseries')
| -rw-r--r-- | arch/powerpc/platforms/pseries/setup.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/pseries/setup.c b/arch/powerpc/platforms/pseries/setup.c index 754e493b7c05..287f33645419 100644 --- a/arch/powerpc/platforms/pseries/setup.c +++ b/arch/powerpc/platforms/pseries/setup.c @@ -549,6 +549,12 @@ static void init_cpu_char_feature_flags(struct h_cpu_char_result *result) if (!(result->behaviour & H_CPU_BEHAV_L1D_FLUSH_PR)) security_ftr_clear(SEC_FTR_L1D_FLUSH_PR); + if (result->behaviour & H_CPU_BEHAV_NO_L1D_FLUSH_ENTRY) + security_ftr_clear(SEC_FTR_L1D_FLUSH_ENTRY); + + if (result->behaviour & H_CPU_BEHAV_NO_L1D_FLUSH_UACCESS) + security_ftr_clear(SEC_FTR_L1D_FLUSH_UACCESS); + if (!(result->behaviour & H_CPU_BEHAV_BNDS_CHK_SPEC_BAR)) security_ftr_clear(SEC_FTR_BNDS_CHK_SPEC_BAR); } |