[PATCH 1/2] drm/amdgpu: fix 64bit shift for KV/KB

[Deucher, Alexander]

> -----Original Message-----
> From: amd-gfx [mailto:amd-gfx-bounces at lists.freedesktop.org] On Behalf
> Of Christian König
> Sent: Tuesday, January 24, 2017 9:10 AM
> To: amd-gfx at lists.freedesktop.org
> Subject: [PATCH 1/2] drm/amdgpu: fix 64bit shift for KV/KB
> 
> From: Christian König <christian.koenig at amd.com>
> 
> Fixes "access stolen VRAM directly on KV/KB" otherwise that won't
> work as expected with more than 4GB RAM.
> 
> Signed-off-by: Christian König <christian.koenig at amd.com>

Series is:
Reviewed-by: Alex Deucher <alexander.deucher at amd.com>

> ---
>  drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c
> b/drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c
> index ccce04d..8d05e0c 100644
> --- a/drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c
> +++ b/drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c
> @@ -378,7 +378,7 @@ static int gmc_v7_0_mc_init(struct amdgpu_device
> *adev)
> 
>  #ifdef CONFIG_X86_64
>  	if (adev->flags & AMD_IS_APU) {
> -		adev->mc.aper_base = RREG32(mmMC_VM_FB_OFFSET) <<
> 22ULL;
> +		adev->mc.aper_base =
> ((u64)RREG32(mmMC_VM_FB_OFFSET)) << 22;
>  		adev->mc.aper_size = adev->mc.real_vram_size;
>  	}
>  #endif
> --
> 2.5.0
> 
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