diff options
| author | Nicholas Piggin <npiggin@gmail.com> | 2021-05-03 16:02:42 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2021-06-21 14:13:19 +0300 |
| commit | 393eff5a7b357a23db3e786e24b5ba8762cc6820 (patch) | |
| tree | 9dc3e36bd70446894232a9036c23c3f3e3159231 /arch/powerpc/platforms | |
| parent | 84ed26fd00c514da57cd46aa3728a48f1f9b35cd (diff) | |
| download | linux-393eff5a7b357a23db3e786e24b5ba8762cc6820.tar.xz | |
powerpc/pesries: Get STF barrier requirement from H_GET_CPU_CHARACTERISTICS
This allows the hypervisor / firmware to describe this 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/20210503130243.891868-4-npiggin@gmail.com
Diffstat (limited to 'arch/powerpc/platforms')
| -rw-r--r-- | arch/powerpc/platforms/pseries/setup.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/pseries/setup.c b/arch/powerpc/platforms/pseries/setup.c index 287f33645419..631a0d57b6cd 100644 --- a/arch/powerpc/platforms/pseries/setup.c +++ b/arch/powerpc/platforms/pseries/setup.c @@ -555,6 +555,9 @@ static void init_cpu_char_feature_flags(struct h_cpu_char_result *result) if (result->behaviour & H_CPU_BEHAV_NO_L1D_FLUSH_UACCESS) security_ftr_clear(SEC_FTR_L1D_FLUSH_UACCESS); + if (result->behaviour & H_CPU_BEHAV_NO_STF_BARRIER) + security_ftr_clear(SEC_FTR_STF_BARRIER); + if (!(result->behaviour & H_CPU_BEHAV_BNDS_CHK_SPEC_BAR)) security_ftr_clear(SEC_FTR_BNDS_CHK_SPEC_BAR); } |