* altivec/spe instructions at some point.
*/
static int save_user_regs(struct pt_regs *regs, struct mcontext __user *frame,
- int sigret, int ctx_has_vsx_region)
+ struct mcontext __user *tm_frame, int sigret,
+ int ctx_has_vsx_region)
{
unsigned long msr = regs->msr;
#endif /* CONFIG_ALTIVEC */
if (copy_fpr_to_user(&frame->mc_fregs, current))
return 1;
+
+ /*
+ * Clear the MSR VSX bit to indicate there is no valid state attached
+ * to this context, except in the specific case below where we set it.
+ */
+ msr &= ~MSR_VSX;
#ifdef CONFIG_VSX
/*
* Copy VSR 0-31 upper half from thread_struct to local
if (__put_user(msr, &frame->mc_gregs[PT_MSR]))
return 1;
+ /* We need to write 0 the MSR top 32 bits in the tm frame so that we
+ * can check it on the restore to see if TM is active
+ */
+ if (tm_frame && __put_user(0, &tm_frame->mc_gregs[PT_MSR]))
+ return 1;
+
if (sigret) {
/* Set up the sigreturn trampoline: li r0,sigret; sc */
if (__put_user(0x38000000UL + sigret, &frame->tramp[0])
{
unsigned long msr = regs->msr;
- /* tm_reclaim rolls back all reg states, updating thread.ckpt_regs,
- * thread.transact_fpr[], thread.transact_vr[], etc.
- */
- tm_enable();
- tm_reclaim(¤t->thread, msr, TM_CAUSE_SIGNAL);
-
/* Make sure floating point registers are stored in regs */
flush_fp_to_thread(current);
struct mcontext __user *tm_sr)
{
long err;
- unsigned long msr;
+ unsigned long msr, msr_hi;
#ifdef CONFIG_VSX
int i;
#endif
* transactional versions should be loaded.
*/
tm_enable();
+ /* Make sure the transaction is marked as failed */
+ current->thread.tm_texasr |= TEXASR_FS;
/* This loads the checkpointed FP/VEC state, if used */
tm_recheckpoint(¤t->thread, msr);
- /* The task has moved into TM state S, so ensure MSR reflects this */
- regs->msr = (regs->msr & ~MSR_TS_MASK) | MSR_TS_S;
+ /* Get the top half of the MSR */
+ if (__get_user(msr_hi, &tm_sr->mc_gregs[PT_MSR]))
+ return 1;
+ /* Pull in MSR TM from user context */
+ regs->msr = (regs->msr & ~MSR_TS_MASK) | ((msr_hi<<32) & MSR_TS_MASK);
/* This loads the speculative FP/VEC state, if used */
if (msr & MSR_FP) {
{
struct rt_sigframe __user *rt_sf;
struct mcontext __user *frame;
+ struct mcontext __user *tm_frame = NULL;
void __user *addr;
unsigned long newsp = 0;
int sigret;
/* Set up Signal Frame */
/* Put a Real Time Context onto stack */
- rt_sf = get_sigframe(ka, regs, sizeof(*rt_sf), 1);
+ rt_sf = get_sigframe(ka, get_tm_stackpointer(regs), sizeof(*rt_sf), 1);
addr = rt_sf;
if (unlikely(rt_sf == NULL))
goto badframe;
}
#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
+ tm_frame = &rt_sf->uc_transact.uc_mcontext;
if (MSR_TM_ACTIVE(regs->msr)) {
- if (save_tm_user_regs(regs, &rt_sf->uc.uc_mcontext,
- &rt_sf->uc_transact.uc_mcontext, sigret))
+ if (save_tm_user_regs(regs, frame, tm_frame, sigret))
goto badframe;
}
else
#endif
- if (save_user_regs(regs, frame, sigret, 1))
+ {
+ if (save_user_regs(regs, frame, tm_frame, sigret, 1))
goto badframe;
+ }
regs->link = tramp;
#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
if (MSR_TM_ACTIVE(regs->msr)) {
if (__put_user((unsigned long)&rt_sf->uc_transact,
&rt_sf->uc.uc_link)
- || __put_user(to_user_ptr(&rt_sf->uc_transact.uc_mcontext),
- &rt_sf->uc_transact.uc_regs))
+ || __put_user((unsigned long)tm_frame, &rt_sf->uc_transact.uc_regs))
goto badframe;
}
else
mctx = (struct mcontext __user *)
((unsigned long) &old_ctx->uc_mcontext & ~0xfUL);
if (!access_ok(VERIFY_WRITE, old_ctx, ctx_size)
- || save_user_regs(regs, mctx, 0, ctx_has_vsx_region)
+ || save_user_regs(regs, mctx, NULL, 0, ctx_has_vsx_region)
|| put_sigset_t(&old_ctx->uc_sigmask, ¤t->blocked)
|| __put_user(to_user_ptr(mctx), &old_ctx->uc_regs))
return -EFAULT;
if (__get_user(msr_hi, &mcp->mc_gregs[PT_MSR]))
goto bad;
- if (MSR_TM_SUSPENDED(msr_hi<<32)) {
+ if (MSR_TM_ACTIVE(msr_hi<<32)) {
/* We only recheckpoint on return if we're
* transaction.
*/
{
struct sigcontext __user *sc;
struct sigframe __user *frame;
+ struct mcontext __user *tm_mctx = NULL;
unsigned long newsp = 0;
int sigret;
unsigned long tramp;
/* Set up Signal Frame */
- frame = get_sigframe(ka, regs, sizeof(*frame), 1);
+ frame = get_sigframe(ka, get_tm_stackpointer(regs), sizeof(*frame), 1);
if (unlikely(frame == NULL))
goto badframe;
sc = (struct sigcontext __user *) &frame->sctx;
}
#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
+ tm_mctx = &frame->mctx_transact;
if (MSR_TM_ACTIVE(regs->msr)) {
if (save_tm_user_regs(regs, &frame->mctx, &frame->mctx_transact,
sigret))
}
else
#endif
- if (save_user_regs(regs, &frame->mctx, sigret, 1))
+ {
+ if (save_user_regs(regs, &frame->mctx, tm_mctx, sigret, 1))
goto badframe;
+ }
regs->link = tramp;
long sys_sigreturn(int r3, int r4, int r5, int r6, int r7, int r8,
struct pt_regs *regs)
{
+ struct sigframe __user *sf;
struct sigcontext __user *sc;
struct sigcontext sigctx;
struct mcontext __user *sr;
void __user *addr;
sigset_t set;
+#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
+ struct mcontext __user *mcp, *tm_mcp;
+ unsigned long msr_hi;
+#endif
/* Always make any pending restarted system calls return -EINTR */
current_thread_info()->restart_block.fn = do_no_restart_syscall;
- sc = (struct sigcontext __user *)(regs->gpr[1] + __SIGNAL_FRAMESIZE);
+ sf = (struct sigframe __user *)(regs->gpr[1] + __SIGNAL_FRAMESIZE);
+ sc = &sf->sctx;
addr = sc;
if (copy_from_user(&sigctx, sc, sizeof(sigctx)))
goto badframe;
#endif
set_current_blocked(&set);
- sr = (struct mcontext __user *)from_user_ptr(sigctx.regs);
- addr = sr;
- if (!access_ok(VERIFY_READ, sr, sizeof(*sr))
- || restore_user_regs(regs, sr, 1))
+#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
+ mcp = (struct mcontext __user *)&sf->mctx;
+ tm_mcp = (struct mcontext __user *)&sf->mctx_transact;
+ if (__get_user(msr_hi, &tm_mcp->mc_gregs[PT_MSR]))
goto badframe;
+ if (MSR_TM_ACTIVE(msr_hi<<32)) {
+ if (!cpu_has_feature(CPU_FTR_TM))
+ goto badframe;
+ if (restore_tm_user_regs(regs, mcp, tm_mcp))
+ goto badframe;
+ } else
+#endif
+ {
+ sr = (struct mcontext __user *)from_user_ptr(sigctx.regs);
+ addr = sr;
+ if (!access_ok(VERIFY_READ, sr, sizeof(*sr))
+ || restore_user_regs(regs, sr, 1))
+ goto badframe;
+ }
set_thread_flag(TIF_RESTOREALL);
return 0;
projects / firefly-linux-kernel-4.4.55.git / blobdiff