[PATCH 01/19] drm/amdgpu/gfx10: enable legacy enforce isolation

[Alex Deucher]

Enable legacy enforce isolation (just serialize kernel
GC submissions).  This way we can reset a ring and
only affect the the process currently using that ring.
This mirrors what windows does.

Signed-off-by: Alex Deucher <alexander.deuc...@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c 
b/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
index 75ea071744eb5..3193eb88b6889 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
@@ -7788,6 +7788,15 @@ static void gfx_v10_0_ring_emit_gds_switch(struct 
amdgpu_ring *ring,
 static int gfx_v10_0_early_init(struct amdgpu_ip_block *ip_block)
 {
        struct amdgpu_device *adev = ip_block->adev;
+       int i;
+
+       if (amdgpu_enforce_isolation == -1) {
+               for (i = 0; i < MAX_XCP; i++) {
+                       /* enable legacy mode by default */
+                        adev->enforce_isolation[i] =
+                                AMDGPU_ENFORCE_ISOLATION_ENABLE_LEGACY;
+               }
+       }
 
        adev->gfx.funcs = &gfx_v10_0_gfx_funcs;
 
-- 
2.49.0