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.koenig at 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; /* set DMA mask + need_dma32 flags. * PCIE - can handle 44-bits. -- 2.17.1
