[v4,0/2] Enable GVT suspend/resume

Message

Colin Xu Oct. 16, 2020, 5:59 a.m. UTC

This patchset enables GVT suspend/resume so that GVT enabled VM can
continue running after host resuming from suspend state.

V2:
- Change kzalloc/kfree to vzalloc/vfree since the space allocated
from kmalloc may not enough for all saved GGTT entries.
- Keep gvt suspend/resume wrapper in intel_gvt.h/intel_gvt.c and
move the actual implementation to gvt.h/gvt.c. (zhenyu)
- Check gvt config on and active with intel_gvt_active(). (zhenyu)

V3: (zhenyu)
- Incorrect copy length. Should be num entries * entry size.
- Use memcpy_toio()/memcpy_fromio() instead of memcpy for iomem.
- Add F_PM_SAVE flags to indicate which MMIOs to save/restore for PM.

V4:
Rebase.

Colin Xu (2):
  drm/i915/gvt: Save/restore HW status for GVT during suspend/resume
  drm/i915/gvt: Add GVT suspend/resume routine to i915

 drivers/gpu/drm/i915/gvt/gtt.c      | 75 +++++++++++++++++++++++++++++
 drivers/gpu/drm/i915/gvt/gtt.h      |  2 +
 drivers/gpu/drm/i915/gvt/gvt.c      | 15 ++++++
 drivers/gpu/drm/i915/gvt/gvt.h      |  8 +++
 drivers/gpu/drm/i915/gvt/handlers.c | 39 +++++++++++++--
 drivers/gpu/drm/i915/gvt/mmio.h     |  3 ++
 drivers/gpu/drm/i915/gvt/vgpu.c     |  1 +
 drivers/gpu/drm/i915/i915_drv.c     |  4 ++
 drivers/gpu/drm/i915/intel_gvt.c    | 29 +++++++++++
 drivers/gpu/drm/i915/intel_gvt.h    | 10 ++++
 10 files changed, 183 insertions(+), 3 deletions(-)