This patch adds cell_spe_follow flag to context flags. This flag is used for following the Cell SPE context switch.
Signed-off-by: Takashi Yamamoto <[EMAIL PROTECTED]>
---
arch/powerpc/perfmon/perfmon_cell.c | 2 ++
include/asm-powerpc/perfmon.h | 8 ++++++++
include/linux/perfmon_kern.h | 3 ++-
perfmon/perfmon.c | 26 ++++++++++++++++++++++----
4 files changed, 34 insertions(+), 5 deletions(-)
--- a/arch/powerpc/perfmon/perfmon_cell.c
+++ b/arch/powerpc/perfmon/perfmon_cell.c
@@ -1220,6 +1220,8 @@ static void pfm_cell_get_ovfl_pmds(struc
**/
static int pfm_cell_create_context(struct pfm_context *ctx, u32 ctx_flags)
{
+ ctx->flags.cell_spe_follow =
+ (ctx_flags & PFM_FL_CELL_SPE_FOLLOW) ? 1:0;
return 0;
}
--- a/include/asm-powerpc/perfmon.h
+++ b/include/asm-powerpc/perfmon.h
@@ -31,4 +31,12 @@
#define PFM_ARCH_MAX_PMCS (256+64) /* 256 HW 64 SW */
#define PFM_ARCH_MAX_PMDS (256+64) /* 256 HW 64 SW */
+/*
+ * context flags (ctx_flags)
+ *
+ * bits[00-15]: generic flags
+ * bits[16-31]: arch-specific flags
+ */
+#define PFM_FL_CELL_SPE_FOLLOW 0x10000
+
#endif /* _ASM_POWERPC_PERFMON_H_ */
--- a/include/linux/perfmon_kern.h
+++ b/include/linux/perfmon_kern.h
@@ -118,7 +118,8 @@ struct pfm_context_flags {
unsigned int can_restart:8; /* allowed to issue a PFM_RESTART */
unsigned int reset_count:8; /* number of pending resets */
unsigned int is_self:1; /* per-thread and self-montoring */
- unsigned int reserved:5; /* for future use */
+ unsigned int cell_spe_follow:1; /* cell spe ctx follow */
+ unsigned int reserved:4; /* for future use */
};
/*
--- a/perfmon/perfmon.c
+++ b/perfmon/perfmon.c
@@ -1289,8 +1289,17 @@ int __pfm_load_context(struct pfm_contex
ctx->last_cpu = -1;
set->priv_flags |= PFM_SETFL_PRIV_MOD_BOTH;
- set_tsk_thread_flag(task, TIF_PERFMON_CTXSW);
- PFM_DBG("[%d] set TIF", task->pid);
+ /*
+ * If cell_spe_follow is true, the task is not marked by
+ * TIF_PERFMON_CTXSW and pfm_ctxsw() is not called
+ * from the task scheduler.
+ * pfm_ctxsw() is called from SPU notifier in perfmon_cell.c
+ *
+ */
+ if (!ctx->flags.cell_spe_follow) {
+ set_tsk_thread_flag(task, TIF_PERFMON_CTXSW);
+ PFM_DBG("[%d] set TIF", task->pid);
+ }
PFM_DBG("context loaded next ctxswin for [%d]", task->pid);
} else {
@@ -1312,8 +1321,17 @@ int __pfm_load_context(struct pfm_contex
ctx->flags.is_self = 1;
- set_tsk_thread_flag(task, TIF_PERFMON_CTXSW);
- PFM_DBG("[%d] set TIF", task->pid);
+ /*
+ * If cell_spe_follow is true, the task is not marked by
+ * TIF_PERFMON_CTXSW and pfm_ctxsw() is not called
+ * from the task scheduler.
+ * pfm_ctxsw() is called from SPU notifier in perfmon_cell.c
+ *
+ */
+ if (!ctx->flags.cell_spe_follow) {
+ set_tsk_thread_flag(task, TIF_PERFMON_CTXSW);
+ PFM_DBG("[%d] set TIF", task->pid);
+ }
/*
* load PMD from set
cell-add-spe-follow-flag.patch
Description: Binary data
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