3 files changed, 22 insertions, 2 deletions

diff --git a/arch/powerpc/kernel/idle_book3s.S b/arch/powerpc/kernel/idle_book3s.S
index 07d4e0ad60db..4898d676dcae 100644
--- a/arch/powerpc/kernel/idle_book3s.S
+++ b/arch/powerpc/kernel/idle_book3s.S
@@ -416,7 +416,7 @@ power9_dd1_recover_paca:
          * which needs to be restored from the stack.
          */
         li      r3, 1
-        stb     r0,PACA_NAPSTATELOST(r13)
+        stb     r3,PACA_NAPSTATELOST(r13)
         blr
 
 /*
diff --git a/arch/powerpc/kernel/kprobes.c b/arch/powerpc/kernel/kprobes.c
index 160ae0fa7d0d..fc4343514bed 100644
--- a/arch/powerpc/kernel/kprobes.c
+++ b/arch/powerpc/kernel/kprobes.c
@@ -305,16 +305,17 @@ int kprobe_handler(struct pt_regs *regs)
                         save_previous_kprobe(kcb);
                         set_current_kprobe(p, regs, kcb);
                         kprobes_inc_nmissed_count(p);
-                        prepare_singlestep(p, regs);
                         kcb->kprobe_status = KPROBE_REENTER;
                         if (p->ainsn.boostable >= 0) {
                                 ret = try_to_emulate(p, regs);
 
                                 if (ret > 0) {
                                         restore_previous_kprobe(kcb);
+                                        preempt_enable_no_resched();
                                         return 1;
                                 }
                         }
+                        prepare_singlestep(p, regs);
                         return 1;
                 } else {
                         if (*addr != BREAKPOINT_INSTRUCTION) {
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);