powerpc: Use MSR_64BIT in places

Use the new MSR_64BIT in a few places. Some of these are already ifdef'ed
for BOOKE vs BOOKS, but it's still clearer, MSR_SF does not immediately
parse as "MSR bit for 64bit".
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

arch/powerpc/kernel/head_64.S

@@ -655,7 +655,7 @@ _GLOBAL(enable_64b_mode)
 	oris	r11,r11,0x8000		/* CM bit set, we'll set ICM later */
 	mtmsr	r11
 #else /* CONFIG_PPC_BOOK3E */
-	li	r12,(MSR_SF | MSR_ISF)@highest
+	li	r12,(MSR_64BIT | MSR_ISF)@highest
 	sldi	r12,r12,48
 	or	r11,r11,r12
 	mtmsrd	r11

arch/powerpc/kernel/signal_64.c

@@ -381,7 +381,7 @@ int sys_rt_sigreturn(unsigned long r3, unsigned long r4, unsigned long r5,
 	       regs, uc, &uc->uc_mcontext);
 #endif
 	if (show_unhandled_signals && printk_ratelimit())
-		printk(regs->msr & MSR_SF ? fmt64 : fmt32,
+		printk(regs->msr & MSR_64BIT ? fmt64 : fmt32,
 			current->comm, current->pid, "rt_sigreturn",
 			(long)uc, regs->nip, regs->link);
 
@@ -469,7 +469,7 @@ int handle_rt_signal64(int signr, struct k_sigaction *ka, siginfo_t *info,
 	       regs, frame, newsp);
 #endif
 	if (show_unhandled_signals && printk_ratelimit())
-		printk(regs->msr & MSR_SF ? fmt64 : fmt32,
+		printk(regs->msr & MSR_64BIT ? fmt64 : fmt32,
 			current->comm, current->pid, "setup_rt_frame",
 			(long)frame, regs->nip, regs->link);
 

arch/powerpc/kernel/traps.c

@@ -199,7 +199,7 @@ void _exception(int signr, struct pt_regs *regs, int code, unsigned long addr)
 	} else if (show_unhandled_signals &&
 		    unhandled_signal(current, signr) &&
 		    printk_ratelimit()) {
-			printk(regs->msr & MSR_SF ? fmt64 : fmt32,
+			printk(regs->msr & MSR_64BIT ? fmt64 : fmt32,
 				current->comm, current->pid, signr,
 				addr, regs->nip, regs->link, code);
 		}

arch/powerpc/xmon/xmon.c

@@ -399,7 +399,7 @@ static int xmon_core(struct pt_regs *regs, int fromipi)
 	cpu_set(cpu, cpus_in_xmon);
 
 	bp = NULL;
-	if ((regs->msr & (MSR_IR|MSR_PR|MSR_SF)) == (MSR_IR|MSR_SF))
+	if ((regs->msr & (MSR_IR|MSR_PR|MSR_64BIT)) == (MSR_IR|MSR_64BIT))
 		bp = at_breakpoint(regs->nip);
 	if (bp || unrecoverable_excp(regs))
 		fromipi = 0;
@@ -529,7 +529,7 @@ static int xmon_core(struct pt_regs *regs, int fromipi)
 		}
 	}
 #else
-	if ((regs->msr & (MSR_IR|MSR_PR|MSR_SF)) == (MSR_IR|MSR_SF)) {
+	if ((regs->msr & (MSR_IR|MSR_PR|MSR_64BIT)) == (MSR_IR|MSR_64BIT)) {
 		bp = at_breakpoint(regs->nip);
 		if (bp != NULL) {
 			int stepped = emulate_step(regs, bp->instr[0]);
@@ -578,7 +578,7 @@ static int xmon_bpt(struct pt_regs *regs)
 	struct bpt *bp;
 	unsigned long offset;
 
-	if ((regs->msr & (MSR_IR|MSR_PR|MSR_SF)) != (MSR_IR|MSR_SF))
+	if ((regs->msr & (MSR_IR|MSR_PR|MSR_64BIT)) != (MSR_IR|MSR_64BIT))
 		return 0;
 
 	/* Are we at the trap at bp->instr[1] for some bp? */
@@ -609,7 +609,7 @@ static int xmon_sstep(struct pt_regs *regs)
 
 static int xmon_dabr_match(struct pt_regs *regs)
 {
-	if ((regs->msr & (MSR_IR|MSR_PR|MSR_SF)) != (MSR_IR|MSR_SF))
+	if ((regs->msr & (MSR_IR|MSR_PR|MSR_64BIT)) != (MSR_IR|MSR_64BIT))
 		return 0;
 	if (dabr.enabled == 0)
 		return 0;
@@ -619,7 +619,7 @@ static int xmon_dabr_match(struct pt_regs *regs)
 
 static int xmon_iabr_match(struct pt_regs *regs)
 {
-	if ((regs->msr & (MSR_IR|MSR_PR|MSR_SF)) != (MSR_IR|MSR_SF))
+	if ((regs->msr & (MSR_IR|MSR_PR|MSR_64BIT)) != (MSR_IR|MSR_64BIT))
 		return 0;
 	if (iabr == NULL)
 		return 0;
@@ -644,7 +644,7 @@ static int xmon_fault_handler(struct pt_regs *regs)
 	if (in_xmon && catch_memory_errors)
 		handle_fault(regs);	/* doesn't return */
 
-	if ((regs->msr & (MSR_IR|MSR_PR|MSR_SF)) == (MSR_IR|MSR_SF)) {
+	if ((regs->msr & (MSR_IR|MSR_PR|MSR_64BIT)) == (MSR_IR|MSR_64BIT)) {
 		bp = in_breakpoint_table(regs->nip, &offset);
 		if (bp != NULL) {
 			regs->nip = bp->address + offset;
@@ -929,7 +929,7 @@ static int do_step(struct pt_regs *regs)
 	int stepped;
 
 	/* check we are in 64-bit kernel mode, translation enabled */
-	if ((regs->msr & (MSR_SF|MSR_PR|MSR_IR)) == (MSR_SF|MSR_IR)) {
+	if ((regs->msr & (MSR_64BIT|MSR_PR|MSR_IR)) == (MSR_64BIT|MSR_IR)) {
 		if (mread(regs->nip, &instr, 4) == 4) {
 			stepped = emulate_step(regs, instr);
 			if (stepped < 0) {