From f56874aec2ec61f2c341b813cc76de5acc51ea12 Mon Sep 17 00:00:00 2001 From: Ranjanikar Nikhil Prabhakarrao Date: Thu, 13 Dec 2018 17:29:20 +0530 Subject: gpu: nvgpu: add speculative barrier Data can be speculativerly stored and code flow can be hijacked. To mitigate this problem insert a speculation barrier. Bug 200447167 Change-Id: Ia865ff2add8b30de49aa970715625b13e8f71c08 Signed-off-by: Ranjanikar Nikhil Prabhakarrao Reviewed-on: https://git-master.nvidia.com/r/1972221 (cherry picked from commit f0762ed4831b3fe6cc953a4a4ec26c2537dcb69f) Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/1996052 Reviewed-by: automaticguardword Reviewed-by: Deepak Nibade Reviewed-by: mobile promotions GVS: Gerrit_Virtual_Submit Tested-by: Deepak Nibade Tested-by: mobile promotions --- drivers/gpu/nvgpu/gv11b/gr_gv11b.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'drivers/gpu/nvgpu/gv11b') diff --git a/drivers/gpu/nvgpu/gv11b/gr_gv11b.c b/drivers/gpu/nvgpu/gv11b/gr_gv11b.c index 1dfecfc1..5820a695 100644 --- a/drivers/gpu/nvgpu/gv11b/gr_gv11b.c +++ b/drivers/gpu/nvgpu/gv11b/gr_gv11b.c @@ -77,6 +77,7 @@ bool gr_gv11b_is_valid_class(struct gk20a *g, u32 class_num) { bool valid = false; + nvgpu_speculation_barrier(); switch (class_num) { case VOLTA_COMPUTE_A: case VOLTA_A: @@ -106,6 +107,7 @@ bool gr_gv11b_is_valid_gfx_class(struct gk20a *g, u32 class_num) { bool valid = false; + nvgpu_speculation_barrier(); switch (class_num) { case VOLTA_A: case PASCAL_A: @@ -140,6 +142,7 @@ bool gr_gv11b_is_valid_compute_class(struct gk20a *g, u32 class_num) { bool valid = false; + nvgpu_speculation_barrier(); switch (class_num) { case VOLTA_COMPUTE_A: case PASCAL_COMPUTE_A: -- cgit v1.2.2