drm/amdgpu/gmc: use PCI BARs for APUs in passthrough

[mirror_ubuntu-jammy-kernel.git] / drivers / gpu / drm / amd / amdgpu / gmc_v7_0.c

diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c
index 0a50fdaced7e5d32075b2d825ce03e94c62abf65..63c47f61d0dfd3e41f3b749e6280a5bb1b3d6527 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c
@@ -381,8 +381,9 @@ static int gmc_v7_0_mc_init(struct amdgpu_device *adev)
        adev->gmc.aper_size = pci_resource_len(adev->pdev, 0);
 
 #ifdef CONFIG_X86_64
-       if (adev->flags & AMD_IS_APU &&
-           adev->gmc.real_vram_size > adev->gmc.aper_size) {
+       if ((adev->flags & AMD_IS_APU) &&
+           adev->gmc.real_vram_size > adev->gmc.aper_size &&
+           !amdgpu_passthrough(adev)) {
                adev->gmc.aper_base = ((u64)RREG32(mmMC_VM_FB_OFFSET)) << 22;
                adev->gmc.aper_size = adev->gmc.real_vram_size;
        }