[PATCH v2] drm/amdgpu/gfx9: Add Cleaner Shader Support for GFX9.x GPUs

[Srinivasan Shanmugam]

Enable the cleaner shader for other GFX9.x series of GPUs to provide
data isolation between GPU workloads. The cleaner shader is responsible
for clearing the Local Data Store (LDS), Vector General Purpose
Registers (VGPRs), and Scalar General Purpose Registers (SGPRs), which
helps prevent data leakage and ensures accurate computation results.

This update extends cleaner shader support to GFX9.x GPUs, previously
available for GFX9.4.2. It enhances security by clearing GPU memory
between processes and maintains a consistent GPU state across KGD and
KFD workloads.

Cc: Manu Rastogi <manu.rast...@amd.com>
Cc: Christian König <christian.koe...@amd.com>
Cc: Alex Deucher <alexander.deuc...@amd.com>
Signed-off-by: Srinivasan Shanmugam <srinivasan.shanmu...@amd.com>
---
v2: Updated comments 

 drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c 
b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
index d50e125fd3e0..866e39f6fab3 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
@@ -2235,6 +2235,25 @@ static int gfx_v9_0_sw_init(struct amdgpu_ip_block 
*ip_block)
        }
 
        switch (amdgpu_ip_version(adev, GC_HWIP, 0)) {
+       case IP_VERSION(9, 0, 1):
+       case IP_VERSION(9, 2, 1):
+       case IP_VERSION(9, 4, 0):
+       case IP_VERSION(9, 2, 2):
+       case IP_VERSION(9, 1, 0):
+       case IP_VERSION(9, 3, 0):
+               adev->gfx.cleaner_shader_ptr = gfx_9_4_2_cleaner_shader_hex;
+               adev->gfx.cleaner_shader_size = 
sizeof(gfx_9_4_2_cleaner_shader_hex);
+               if (adev->gfx.me_fw_version  >= 167 &&
+                   adev->gfx.pfp_fw_version >= 196 &&
+                   adev->gfx.mec_fw_version >= 474) {
+                       adev->gfx.enable_cleaner_shader = true;
+                       r = amdgpu_gfx_cleaner_shader_sw_init(adev, 
adev->gfx.cleaner_shader_size);
+                       if (r) {
+                               adev->gfx.enable_cleaner_shader = false;
+                               dev_err(adev->dev, "Failed to initialize 
cleaner shader\n");
+                       }
+               }
+               break;
        case IP_VERSION(9, 4, 2):
                adev->gfx.cleaner_shader_ptr = gfx_9_4_2_cleaner_shader_hex;
                adev->gfx.cleaner_shader_size = 
sizeof(gfx_9_4_2_cleaner_shader_hex);
-- 
2.34.1