[PATCH v2 0/3] enable switching to new gpu index for hibernate on SRIOV.

[Samuel Zhang]

On SRIOV and VM environment, customer may need to switch to new vGPU indexes
after hibernate and then resume the VM. For GPUs with XGMI, `vram_start` will 
change in this case, the FB aperture gpu address of VRAM BOs will also change.
These gpu addresses need to be updated when resume. But these addresses are all
over the KMD codebase, updating each of them is error-prone and not acceptable. 

The solution is to use pdb0 page table to cover both vram and gart memory and
use GART aperture gpu address instead. When gpu indexes change, the GART gpu 
address won't change.

For psp and smu, pdb0's gpu address does not work, so the original FB aperture
gpu address is used instead. They need to be updated when resume with changed vGPUs.

Samuel Zhang (3):
  drm/amdgpu: update XGMI physical node id and GMC configs on resume
  drm/amdgpu: update GPU addresses for SMU and PSP
  drm/amdgpu: enable pdb0 for hibernation on SRIOV

 drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 25 ++++++++++++
 drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c    | 46 ++++++++++++++++------
 drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.h    |  2 +
 drivers/gpu/drm/amd/amdgpu/amdgpu_object.c | 18 +++++++++
 drivers/gpu/drm/amd/amdgpu/amdgpu_object.h |  1 +
 drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c    | 22 +++++++++++
 drivers/gpu/drm/amd/amdgpu/amdgpu_ucode.c  |  3 ++
 drivers/gpu/drm/amd/amdgpu/gfxhub_v1_2.c   |  2 +-
 drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c      | 21 ++++++++--
 drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c  | 17 ++++++++
 10 files changed, 140 insertions(+), 17 deletions(-)

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2.43.5