1 files changed, 79 insertions, 45 deletions

diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c
index fad50db9dcf2..9c21288f8645 100644
--- a/arch/powerpc/kernel/process.c
+++ b/arch/powerpc/kernel/process.c
@@ -236,23 +236,9 @@ void enable_kernel_fp(void)
 	}
 }
 EXPORT_SYMBOL(enable_kernel_fp);
-
-static int restore_fp(struct task_struct *tsk)
-{
-	if (tsk->thread.load_fp) {
-		load_fp_state(&current->thread.fp_state);
-		current->thread.load_fp++;
-		return 1;
-	}
-	return 0;
-}
-#else
-static int restore_fp(struct task_struct *tsk) { return 0; }
 #endif /* CONFIG_PPC_FPU */
 
 #ifdef CONFIG_ALTIVEC
-#define loadvec(thr) ((thr).load_vec)
-
 static void __giveup_altivec(struct task_struct *tsk)
 {
 	unsigned long msr;
@@ -318,21 +304,6 @@ void flush_altivec_to_thread(struct task_struct *tsk)
 	}
 }
 EXPORT_SYMBOL_GPL(flush_altivec_to_thread);
-
-static int restore_altivec(struct task_struct *tsk)
-{
-	if (cpu_has_feature(CPU_FTR_ALTIVEC) && (tsk->thread.load_vec)) {
-		load_vr_state(&tsk->thread.vr_state);
-		tsk->thread.used_vr = 1;
-		tsk->thread.load_vec++;
-
-		return 1;
-	}
-	return 0;
-}
-#else
-#define loadvec(thr) 0
-static inline int restore_altivec(struct task_struct *tsk) { return 0; }
 #endif /* CONFIG_ALTIVEC */
 
 #ifdef CONFIG_VSX
@@ -400,18 +371,6 @@ void flush_vsx_to_thread(struct task_struct *tsk)
 	}
 }
 EXPORT_SYMBOL_GPL(flush_vsx_to_thread);
-
-static int restore_vsx(struct task_struct *tsk)
-{
-	if (cpu_has_feature(CPU_FTR_VSX)) {
-		tsk->thread.used_vsr = 1;
-		return 1;
-	}
-
-	return 0;
-}
-#else
-static inline int restore_vsx(struct task_struct *tsk) { return 0; }
 #endif /* CONFIG_VSX */
 
 #ifdef CONFIG_SPE
@@ -511,6 +470,53 @@ void giveup_all(struct task_struct *tsk)
 }
 EXPORT_SYMBOL(giveup_all);
 
+#ifdef CONFIG_PPC_BOOK3S_64
+#ifdef CONFIG_PPC_FPU
+static int restore_fp(struct task_struct *tsk)
+{
+	if (tsk->thread.load_fp) {
+		load_fp_state(&current->thread.fp_state);
+		current->thread.load_fp++;
+		return 1;
+	}
+	return 0;
+}
+#else
+static int restore_fp(struct task_struct *tsk) { return 0; }
+#endif /* CONFIG_PPC_FPU */
+
+#ifdef CONFIG_ALTIVEC
+#define loadvec(thr) ((thr).load_vec)
+static int restore_altivec(struct task_struct *tsk)
+{
+	if (cpu_has_feature(CPU_FTR_ALTIVEC) && (tsk->thread.load_vec)) {
+		load_vr_state(&tsk->thread.vr_state);
+		tsk->thread.used_vr = 1;
+		tsk->thread.load_vec++;
+
+		return 1;
+	}
+	return 0;
+}
+#else
+#define loadvec(thr) 0
+static inline int restore_altivec(struct task_struct *tsk) { return 0; }
+#endif /* CONFIG_ALTIVEC */
+
+#ifdef CONFIG_VSX
+static int restore_vsx(struct task_struct *tsk)
+{
+	if (cpu_has_feature(CPU_FTR_VSX)) {
+		tsk->thread.used_vsr = 1;
+		return 1;
+	}
+
+	return 0;
+}
+#else
+static inline int restore_vsx(struct task_struct *tsk) { return 0; }
+#endif /* CONFIG_VSX */
+
 /*
  * The exception exit path calls restore_math() with interrupts hard disabled
  * but the soft irq state not "reconciled". ftrace code that calls
@@ -551,6 +557,7 @@ void notrace restore_math(struct pt_regs *regs)
 
 	regs->msr = msr;
 }
+#endif
 
 static void save_all(struct task_struct *tsk)
 {
@@ -1634,11 +1641,9 @@ int copy_thread_tls(unsigned long clone_flags, unsigned long usp,
 		p->thread.regs = childregs;
 		childregs->gpr[3] = 0;  /* Result from fork() */
 		if (clone_flags & CLONE_SETTLS) {
-#ifdef CONFIG_PPC64
 			if (!is_32bit_task())
 				childregs->gpr[13] = tls;
 			else
-#endif
 				childregs->gpr[2] = tls;
 		}
 
@@ -1976,6 +1981,32 @@ static inline int valid_irq_stack(unsigned long sp, struct task_struct *p,
 	return 0;
 }
 
+static inline int valid_emergency_stack(unsigned long sp, struct task_struct *p,
+					unsigned long nbytes)
+{
+#ifdef CONFIG_PPC64
+	unsigned long stack_page;
+	unsigned long cpu = task_cpu(p);
+
+	stack_page = (unsigned long)paca_ptrs[cpu]->emergency_sp - THREAD_SIZE;
+	if (sp >= stack_page && sp <= stack_page + THREAD_SIZE - nbytes)
+		return 1;
+
+# ifdef CONFIG_PPC_BOOK3S_64
+	stack_page = (unsigned long)paca_ptrs[cpu]->nmi_emergency_sp - THREAD_SIZE;
+	if (sp >= stack_page && sp <= stack_page + THREAD_SIZE - nbytes)
+		return 1;
+
+	stack_page = (unsigned long)paca_ptrs[cpu]->mc_emergency_sp - THREAD_SIZE;
+	if (sp >= stack_page && sp <= stack_page + THREAD_SIZE - nbytes)
+		return 1;
+# endif
+#endif
+
+	return 0;
+}
+
+
 int validate_sp(unsigned long sp, struct task_struct *p,
 		       unsigned long nbytes)
 {
@@ -1987,7 +2018,10 @@ int validate_sp(unsigned long sp, struct task_struct *p,
 	if (sp >= stack_page && sp <= stack_page + THREAD_SIZE - nbytes)
 		return 1;
 
-	return valid_irq_stack(sp, p, nbytes);
+	if (valid_irq_stack(sp, p, nbytes))
+		return 1;
+
+	return valid_emergency_stack(sp, p, nbytes);
 }
 
 EXPORT_SYMBOL(validate_sp);
@@ -2053,7 +2087,7 @@ void show_stack(struct task_struct *tsk, unsigned long *stack)
 	sp = (unsigned long) stack;
 	if (sp == 0) {
 		if (tsk == current)
-			sp = current_stack_pointer();
+			sp = current_stack_frame();
 		else
 			sp = tsk->thread.ksp;
 	}