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authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2007-06-04 15:15:48 +1000
committerPaul Mackerras <paulus@samba.org>2007-06-14 22:29:57 +1000
commit791cc501d422be96d6e3098faf6471ba29f4dd33 (patch)
treeab148d7193442a8a95c0f89fd96aa69f4fbbd4a3 /arch/powerpc
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')
-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 6e2f03566b0..84f000a45e3 100644
--- a/arch/powerpc/kernel/process.c
+++ b/arch/powerpc/kernel/process.c
@@ -219,22 +219,26 @@ void discard_lazy_cpu_state(void)
}
#endif /* CONFIG_SMP */
-#ifdef CONFIG_PPC_MERGE /* XXX for now */
int set_dabr(unsigned long dabr)
{
+#ifdef CONFIG_PPC_MERGE /* XXX for now */
if (ppc_md.set_dabr)
return ppc_md.set_dabr(dabr);
+#endif
+ /* XXX should we have a CPU_FTR_HAS_DABR ? */
+#if defined(CONFIG_PPC64) || defined(CONFIG_6xx)
mtspr(SPRN_DABR, dabr);
+#endif
return 0;
}
-#endif
#ifdef CONFIG_PPC64
DEFINE_PER_CPU(struct cpu_usage, cpu_usage_array);
-static DEFINE_PER_CPU(unsigned long, current_dabr);
#endif
+static DEFINE_PER_CPU(unsigned long, current_dabr);
+
struct task_struct *__switch_to(struct task_struct *prev,
struct task_struct *new)
{
@@ -299,12 +303,10 @@ struct task_struct *__switch_to(struct task_struct *prev,
#endif /* CONFIG_SMP */
-#ifdef CONFIG_PPC64 /* for now */
if (unlikely(__get_cpu_var(current_dabr) != new->thread.dabr)) {
set_dabr(new->thread.dabr);
__get_cpu_var(current_dabr) = new->thread.dabr;
}
-#endif /* CONFIG_PPC64 */
new_thread = &new->thread;
old_thread = &current->thread;
@@ -473,12 +475,10 @@ void flush_thread(void)
discard_lazy_cpu_state();
-#ifdef CONFIG_PPC64 /* for now */
if (current->thread.dabr) {
current->thread.dabr = 0;
set_dabr(0);
}
-#endif
}
void