On 08/28/2018 12:53 AM, Christian König wrote:
Only use the lower address space on GMC9 for the system domain.
Otherwise we would need to sign extend GMC addresses.
Signed-off-by: Christian König <christian.koe...@amd.com>
---
drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c | 7 +++----
1 file changed, 3 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
index e44b5191735d..d982956c8329 100644
--- a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
@@ -938,11 +938,10 @@ static int gmc_v9_0_sw_init(void *handle)
if (r)
return r;
- /* Set the internal MC address mask
- * This is the max address of the GPU's
- * internal address space.
+ /* Use only the lower range for the internal MC address mask. This is
+ * the max address of the GPU's internal address space.
*/
- adev->gmc.mc_mask = 0xffffffffffffULL; /* 48 bit MC */
+ adev->gmc.mc_mask = 0x7fffffffffffULL;
do we need to update vm_size as 128T at the same time?
Jerry
/* set DMA mask + need_dma32 flags.
* PCIE - can handle 44-bits.
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