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authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2007-06-04 01:15:48 -0400
committerPaul Mackerras <paulus@samba.org>2007-06-14 08:29:57 -0400
commit791cc501d422be96d6e3098faf6471ba29f4dd33 (patch)
treeab148d7193442a8a95c0f89fd96aa69f4fbbd4a3 /arch/powerpc/kernel
parent6d110da8c3c62167c54eb5e32bb80916a1a23362 (diff)
[POWERPC] Always apply DABR changes on context switches
This patch removes the #ifdef CONFIG_PPC64 around setting the DABR. The actual setting of the SPR inside of the set_dabr() function is dependent on CONFIG_PPC64 || CONFIG_6xx but you can always provide a ppc_md hook to override that. We should improve support for different HW breakpoints facilities but this is a first step. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/kernel')
-rw-r--r--arch/powerpc/kernel/process.c14
1 files changed, 7 insertions, 7 deletions
diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c
index 6e2f03566b0d..84f000a45e36 100644
--- a/arch/powerpc/kernel/process.c
+++ b/arch/powerpc/kernel/process.c
@@ -219,22 +219,26 @@ void discard_lazy_cpu_state(void)
219} 219}
220#endif /* CONFIG_SMP */ 220#endif /* CONFIG_SMP */
221 221
222#ifdef CONFIG_PPC_MERGE /* XXX for now */
223int set_dabr(unsigned long dabr) 222int set_dabr(unsigned long dabr)
224{ 223{
224#ifdef CONFIG_PPC_MERGE /* XXX for now */
225 if (ppc_md.set_dabr) 225 if (ppc_md.set_dabr)
226 return ppc_md.set_dabr(dabr); 226 return ppc_md.set_dabr(dabr);
227#endif
227 228
229 /* XXX should we have a CPU_FTR_HAS_DABR ? */
230#if defined(CONFIG_PPC64) || defined(CONFIG_6xx)
228 mtspr(SPRN_DABR, dabr); 231 mtspr(SPRN_DABR, dabr);
232#endif
229 return 0; 233 return 0;
230} 234}
231#endif
232 235
233#ifdef CONFIG_PPC64 236#ifdef CONFIG_PPC64
234DEFINE_PER_CPU(struct cpu_usage, cpu_usage_array); 237DEFINE_PER_CPU(struct cpu_usage, cpu_usage_array);
235static DEFINE_PER_CPU(unsigned long, current_dabr);
236#endif 238#endif
237 239
240static DEFINE_PER_CPU(unsigned long, current_dabr);
241
238struct task_struct *__switch_to(struct task_struct *prev, 242struct task_struct *__switch_to(struct task_struct *prev,
239 struct task_struct *new) 243 struct task_struct *new)
240{ 244{
@@ -299,12 +303,10 @@ struct task_struct *__switch_to(struct task_struct *prev,
299 303
300#endif /* CONFIG_SMP */ 304#endif /* CONFIG_SMP */
301 305
302#ifdef CONFIG_PPC64 /* for now */
303 if (unlikely(__get_cpu_var(current_dabr) != new->thread.dabr)) { 306 if (unlikely(__get_cpu_var(current_dabr) != new->thread.dabr)) {
304 set_dabr(new->thread.dabr); 307 set_dabr(new->thread.dabr);
305 __get_cpu_var(current_dabr) = new->thread.dabr; 308 __get_cpu_var(current_dabr) = new->thread.dabr;
306 } 309 }
307#endif /* CONFIG_PPC64 */
308 310
309 new_thread = &new->thread; 311 new_thread = &new->thread;
310 old_thread = &current->thread; 312 old_thread = &current->thread;
@@ -473,12 +475,10 @@ void flush_thread(void)
473 475
474 discard_lazy_cpu_state(); 476 discard_lazy_cpu_state();
475 477
476#ifdef CONFIG_PPC64 /* for now */
477 if (current->thread.dabr) { 478 if (current->thread.dabr) {
478 current->thread.dabr = 0; 479 current->thread.dabr = 0;
479 set_dabr(0); 480 set_dabr(0);
480 } 481 }
481#endif
482} 482}
483 483
484void 484void