gpu: nvgpu: vgpu: cyclestat snapshot support

Add support for cyclestats snapshots in the virtual case

Bug 1700143
JIRA EVLR-278

Change-Id: I376a8804d57324f43eb16452d857a3b7bb0ecc90
Signed-off-by: Peter Daifuku <pdaifuku@nvidia.com>
Reviewed-on: http://git-master/r/1211547
GVS: Gerrit_Virtual_Submit
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/vgpu/gr_vgpu.c b/drivers/gpu/nvgpu/vgpu/gr_vgpu.c
index 783b2f55..89223091 100644
--- a/drivers/gpu/nvgpu/vgpu/gr_vgpu.c
+++ b/drivers/gpu/nvgpu/vgpu/gr_vgpu.c
@@ -875,6 +875,10 @@ static int vgpu_gr_init_gr_setup_sw(struct gk20a *g)
 
         gr->g = g;
 
+#if defined(CONFIG_GK20A_CYCLE_STATS)
+        mutex_init(&g->gr.cs_lock);
+#endif
+
         err = vgpu_gr_init_gr_config(g, gr);
         if (err)
                 goto clean_up;