From: arnd@arndb.de Date: Mon, 19 Jun 2006 18:33:24 +0000 (+0200) Subject: [POWERPC] spufs: add a phys-id attribute to each SPU context X-Git-Tag: firefly_0821_release~35458^2~225^2~20 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=7b1a701480fb17b7f78b95b257bfc90a4f949d04;p=firefly-linux-kernel-4.4.55.git [POWERPC] spufs: add a phys-id attribute to each SPU context For performance analysis, it is often interesting to know which physical SPE a thread is currently running on, and, more importantly, if it is running at all. This patch adds a simple attribute to each SPU directory with that information. The attribute is read-only and called 'phys-id'. It contains an ascii string with the number of the physical SPU (e.g. "0x5"), or alternatively the string "0xffffffff" (32 bit -1) when it is not running at all at the time that the file is read. Signed-off-by: Arnd Bergmann Signed-off-by: Paul Mackerras --- diff --git a/arch/powerpc/platforms/cell/spufs/file.c b/arch/powerpc/platforms/cell/spufs/file.c index 3bc00913fe18..80c02660e617 100644 --- a/arch/powerpc/platforms/cell/spufs/file.c +++ b/arch/powerpc/platforms/cell/spufs/file.c @@ -1328,6 +1328,22 @@ static u64 spufs_srr0_get(void *data) DEFINE_SIMPLE_ATTRIBUTE(spufs_srr0_ops, spufs_srr0_get, spufs_srr0_set, "%llx\n") +static u64 spufs_id_get(void *data) +{ + struct spu_context *ctx = data; + u64 num; + + spu_acquire(ctx); + if (ctx->state == SPU_STATE_RUNNABLE) + num = ctx->spu->number; + else + num = (unsigned int)-1; + spu_release(ctx); + + return num; +} +DEFINE_SIMPLE_ATTRIBUTE(spufs_id_ops, spufs_id_get, 0, "0x%llx\n") + struct tree_descr spufs_dir_contents[] = { { "mem", &spufs_mem_fops, 0666, }, { "regs", &spufs_regs_fops, 0666, }, @@ -1351,5 +1367,6 @@ 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, }, {}, };