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-rw-r--r--arch/powerpc/platforms/cell/spufs/file.c18
-rw-r--r--arch/powerpc/platforms/cell/spufs/sched.c22
-rw-r--r--arch/powerpc/platforms/cell/spufs/spufs.h1
-rw-r--r--include/asm-powerpc/spu.h18
4 files changed, 58 insertions, 1 deletions
diff --git a/arch/powerpc/platforms/cell/spufs/file.c b/arch/powerpc/platforms/cell/spufs/file.c
index e2c9d48a680..e0d73004526 100644
--- a/arch/powerpc/platforms/cell/spufs/file.c
+++ b/arch/powerpc/platforms/cell/spufs/file.c
@@ -1487,6 +1487,21 @@ static u64 spufs_id_get(void *data)
}
DEFINE_SIMPLE_ATTRIBUTE(spufs_id_ops, spufs_id_get, NULL, "0x%llx\n")
+static u64 spufs_object_id_get(void *data)
+{
+ struct spu_context *ctx = data;
+ return ctx->object_id;
+}
+
+static void spufs_object_id_set(void *data, u64 id)
+{
+ struct spu_context *ctx = data;
+ ctx->object_id = id;
+}
+
+DEFINE_SIMPLE_ATTRIBUTE(spufs_object_id_ops, spufs_object_id_get,
+ spufs_object_id_set, "0x%llx\n");
+
struct tree_descr spufs_dir_contents[] = {
{ "mem", &spufs_mem_fops, 0666, },
{ "regs", &spufs_regs_fops, 0666, },
@@ -1510,7 +1525,8 @@ struct tree_descr spufs_dir_contents[] = {
{ "spu_tag_mask", &spufs_spu_tag_mask_ops, 0666, },
{ "event_mask", &spufs_event_mask_ops, 0666, },
{ "srr0", &spufs_srr0_ops, 0666, },
- { "phys-id", &spufs_id_ops, 0666, },
{ "psmap", &spufs_psmap_fops, 0666, },
+ { "phys-id", &spufs_id_ops, 0666, },
+ { "object-id", &spufs_object_id_ops, 0666, },
{},
};
diff --git a/arch/powerpc/platforms/cell/spufs/sched.c b/arch/powerpc/platforms/cell/spufs/sched.c
index a824b605116..bd6fe4b7a84 100644
--- a/arch/powerpc/platforms/cell/spufs/sched.c
+++ b/arch/powerpc/platforms/cell/spufs/sched.c
@@ -35,6 +35,7 @@
#include <linux/unistd.h>
#include <linux/numa.h>
#include <linux/mutex.h>
+#include <linux/notifier.h>
#include <asm/io.h>
#include <asm/mmu_context.h>
@@ -75,6 +76,25 @@ static inline void mm_needs_global_tlbie(struct mm_struct *mm)
__cpus_setall(&mm->cpu_vm_mask, nr);
}
+static BLOCKING_NOTIFIER_HEAD(spu_switch_notifier);
+
+static void spu_switch_notify(struct spu *spu, struct spu_context *ctx)
+{
+ blocking_notifier_call_chain(&spu_switch_notifier,
+ ctx ? ctx->object_id : 0, spu);
+}
+
+int spu_switch_event_register(struct notifier_block * n)
+{
+ return blocking_notifier_chain_register(&spu_switch_notifier, n);
+}
+
+int spu_switch_event_unregister(struct notifier_block * n)
+{
+ return blocking_notifier_chain_unregister(&spu_switch_notifier, n);
+}
+
+
static inline void bind_context(struct spu *spu, struct spu_context *ctx)
{
pr_debug("%s: pid=%d SPU=%d NODE=%d\n", __FUNCTION__, current->pid,
@@ -97,12 +117,14 @@ static inline void bind_context(struct spu *spu, struct spu_context *ctx)
spu_restore(&ctx->csa, spu);
spu->timestamp = jiffies;
spu_cpu_affinity_set(spu, raw_smp_processor_id());
+ spu_switch_notify(spu, ctx);
}
static inline void unbind_context(struct spu *spu, struct spu_context *ctx)
{
pr_debug("%s: unbind pid=%d SPU=%d NODE=%d\n", __FUNCTION__,
spu->pid, spu->number, spu->node);
+ spu_switch_notify(spu, NULL);
spu_unmap_mappings(ctx);
spu_save(&ctx->csa, spu);
spu->timestamp = jiffies;
diff --git a/arch/powerpc/platforms/cell/spufs/spufs.h b/arch/powerpc/platforms/cell/spufs/spufs.h
index f6624ceedf7..a0f55ca2d48 100644
--- a/arch/powerpc/platforms/cell/spufs/spufs.h
+++ b/arch/powerpc/platforms/cell/spufs/spufs.h
@@ -50,6 +50,7 @@ struct spu_context {
struct address_space *cntl; /* 'control' area mappings. */
struct address_space *signal1; /* 'signal1' area mappings. */
struct address_space *signal2; /* 'signal2' area mappings. */
+ u64 object_id; /* user space pointer for oprofile */
enum { SPU_STATE_RUNNABLE, SPU_STATE_SAVED } state;
struct rw_semaphore state_sema;
diff --git a/include/asm-powerpc/spu.h b/include/asm-powerpc/spu.h
index 83b6dae48ef..e73ea00efd8 100644
--- a/include/asm-powerpc/spu.h
+++ b/include/asm-powerpc/spu.h
@@ -201,6 +201,24 @@ static inline void unregister_spu_syscalls(struct spufs_calls *calls)
/*
+ * Notifier blocks:
+ *
+ * oprofile can get notified when a context switch is performed
+ * on an spe. The notifer function that gets called is passed
+ * a pointer to the SPU structure as well as the object-id that
+ * identifies the binary running on that SPU now.
+ *
+ * For a context save, the object-id that is passed is zero,
+ * identifying that the kernel will run from that moment on.
+ *
+ * For a context restore, the object-id is the value written
+ * to object-id spufs file from user space and the notifer
+ * function can assume that spu->ctx is valid.
+ */
+int spu_switch_event_register(struct notifier_block * n);
+int spu_switch_event_unregister(struct notifier_block * n);
+
+/*
* This defines the Local Store, Problem Area and Privlege Area of an SPU.
*/