GPU memory-mapped register fields that read back as zero through the BAR0 decoupler in confidential-computing mode (H100 measurement)
~99.78%observed
| Value kind | observed — Reported measurements, counts, and specifications keep the precision and scope stated by their source; an exact specification is not treated as a range. |
|---|---|
| Scope | Measured on H100 (arXiv 2507.02770). In normal mode the same study found 7.94% of register fields return values and 80.25% return errors; that is not a hidden share, so do not compare the two figures. |
| As of | 2025-07 |
| Source | NVIDIA WP-12554 / arXiv 2507.02770 |
| Review | checking…review by 2027-07-01 · standard cadence |
| Recorded changes | last 2026-10-16 · 2 revisions tracked |
| Claim id | gpu-registers-hidden-by-the-bar0-decoupler-in |
Where the guide uses it
- 11.5 GPU Confidential Computing & Trusted Execution
- 11.12 Security Operations, Detection & Incident Response
← Full numbers register — every date-stamped figure in the guide, with revision history.