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| author | Michal Wajdeczko <michal.wajdeczko@intel.com> | 2025-11-12 13:44:08 +0100 |
|---|---|---|
| committer | Michal Wajdeczko <michal.wajdeczko@intel.com> | 2025-11-13 14:32:34 +0100 |
| commit | e448372e8a8ed2708ac4f85d74979885e47d5566 (patch) | |
| tree | 1f2a1b2975c3c9eafa929505d466d4baa67b8f0e /tools/docs/lib/parse_data_structs.py | |
| parent | aaecfadc22cca4c7ad381b1df457e8857c01fe14 (diff) | |
drm/xe/pf: Use migration-friendly GGTT auto-provisioning
Instead of trying very hard to find the largest fair GGTT size that
could be allocated for VFs on the current tile, pick some smaller
rounded down to power-of-two value that is more likely to be
provisioned in the same manner by the other PF instance:
num VFs | GGTT space (MiB)
--------+-----------------
63..57 | 56
56..29 | 64
28..15 | 128
14..8 | 256
7..4 | 512
3..2 | 1024
1 | 2048 (regular PF)
1 | 3584 (admin only PF)
Note that due to FW/HW limitations we can't share all 4GiB GGTT
address space with VFs, so for the larger (>7) number of the VFs
the change in the outcome is happening at different points than
we have in case of GuC contexts/doorbells IDs.
Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Reviewed-by: Piotr Piórkowski <piotr.piorkowski@intel.com>
Link: https://patch.msgid.link/20251112124408.8094-1-michal.wajdeczko@intel.com
Diffstat (limited to 'tools/docs/lib/parse_data_structs.py')
0 files changed, 0 insertions, 0 deletions