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authorKumar Gala <galak@kernel.crashing.org>2007-09-13 01:44:20 -0500
committerKumar Gala <galak@kernel.crashing.org>2007-09-14 08:53:30 -0500
commit5e14d21e3f28a4181dacff0336040e30942f4921 (patch)
treeebaa8217d5af80e15116960641a0bf87a8b5d717 /arch/powerpc/kernel/process.c
parentd8f1324a5063c833862328ceafabc53ac3cc4f71 (diff)
[POWERPC] Add cpu feature for SPE handling
Make it so that SPE support can be determined at runtime. This is similiar to how we handle AltiVec. This allows us to have SPE support built in and work on processors with and without SPE. Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/kernel/process.c')
-rw-r--r--arch/powerpc/kernel/process.c15
1 files changed, 11 insertions, 4 deletions
diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c
index e477c9d0498..57c589c3414 100644
--- a/arch/powerpc/kernel/process.c
+++ b/arch/powerpc/kernel/process.c
@@ -669,9 +669,13 @@ int set_fpexc_mode(struct task_struct *tsk, unsigned int val)
* mode (asyn, precise, disabled) for 'Classic' FP. */
if (val & PR_FP_EXC_SW_ENABLE) {
#ifdef CONFIG_SPE
- tsk->thread.fpexc_mode = val &
- (PR_FP_EXC_SW_ENABLE | PR_FP_ALL_EXCEPT);
- return 0;
+ if (cpu_has_feature(CPU_FTR_SPE)) {
+ tsk->thread.fpexc_mode = val &
+ (PR_FP_EXC_SW_ENABLE | PR_FP_ALL_EXCEPT);
+ return 0;
+ } else {
+ return -EINVAL;
+ }
#else
return -EINVAL;
#endif
@@ -697,7 +701,10 @@ int get_fpexc_mode(struct task_struct *tsk, unsigned long adr)
if (tsk->thread.fpexc_mode & PR_FP_EXC_SW_ENABLE)
#ifdef CONFIG_SPE
- val = tsk->thread.fpexc_mode;
+ if (cpu_has_feature(CPU_FTR_SPE))
+ val = tsk->thread.fpexc_mode;
+ else
+ return -EINVAL;
#else
return -EINVAL;
#endif