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| author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2007-06-04 07:15:48 +0200 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2007-06-14 14:29:57 +0200 |
| commit | 791cc501d422be96d6e3098faf6471ba29f4dd33 (patch) | |
| tree | ab148d7193442a8a95c0f89fd96aa69f4fbbd4a3 /arch/powerpc/kernel/process.c | |
| parent | [POWERPC] powerpc: ptrace can set DABR on both 32 and 64 bits (diff) | |
| download | linux-791cc501d422be96d6e3098faf6471ba29f4dd33.tar.xz linux-791cc501d422be96d6e3098faf6471ba29f4dd33.zip | |
[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/process.c')
| -rw-r--r-- | arch/powerpc/kernel/process.c | 14 |
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) } #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 = ¤t->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 |