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author | Dave Airlie <airlied@redhat.com> | 2017-05-30 15:54:15 +1000 |
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committer | Dave Airlie <airlied@redhat.com> | 2017-05-30 15:54:15 +1000 |
commit | 2a1720376adda5ecf8e636fbfb05339c7dad1c55 (patch) | |
tree | cdb76abac82306516aa556d9e9ddb15571f07517 /arch/powerpc/kernel/process.c | |
parent | a82256bc026722800d1fdeca5521f1ba487bc2ef (diff) | |
parent | 5ed02dbb497422bf225783f46e6eadd237d23d6b (diff) | |
download | linux-stable-2a1720376adda5ecf8e636fbfb05339c7dad1c55.tar.gz linux-stable-2a1720376adda5ecf8e636fbfb05339c7dad1c55.tar.bz2 linux-stable-2a1720376adda5ecf8e636fbfb05339c7dad1c55.zip |
Backmerge tag 'v4.12-rc3' into drm-next
Linux 4.12-rc3
Daniel has requested this for some drm-intel-next work.
Diffstat (limited to 'arch/powerpc/kernel/process.c')
-rw-r--r-- | arch/powerpc/kernel/process.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c index d645da302bf2..baae104b16c7 100644 --- a/arch/powerpc/kernel/process.c +++ b/arch/powerpc/kernel/process.c @@ -864,6 +864,25 @@ static void tm_reclaim_thread(struct thread_struct *thr, if (!MSR_TM_SUSPENDED(mfmsr())) return; + /* + * If we are in a transaction and FP is off then we can't have + * used FP inside that transaction. Hence the checkpointed + * state is the same as the live state. We need to copy the + * live state to the checkpointed state so that when the + * transaction is restored, the checkpointed state is correct + * and the aborted transaction sees the correct state. We use + * ckpt_regs.msr here as that's what tm_reclaim will use to + * determine if it's going to write the checkpointed state or + * not. So either this will write the checkpointed registers, + * or reclaim will. Similarly for VMX. + */ + if ((thr->ckpt_regs.msr & MSR_FP) == 0) + memcpy(&thr->ckfp_state, &thr->fp_state, + sizeof(struct thread_fp_state)); + if ((thr->ckpt_regs.msr & MSR_VEC) == 0) + memcpy(&thr->ckvr_state, &thr->vr_state, + sizeof(struct thread_vr_state)); + giveup_all(container_of(thr, struct task_struct, thread)); tm_reclaim(thr, thr->ckpt_regs.msr, cause); |