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* [PATCH 0/9] Don't whitelist OA registers unconditionally
@ 2026-05-18 23:47 Ashutosh Dixit
  2026-05-18 23:47 ` [PATCH 1/9] drm/xe/rtp: Add RING_FORCE_TO_NONPRIV_DENY to OA whitelists Ashutosh Dixit
                   ` (12 more replies)
  0 siblings, 13 replies; 34+ messages in thread
From: Ashutosh Dixit @ 2026-05-18 23:47 UTC (permalink / raw)
  To: intel-xe

Whitelisting OA registers unconditionally is a security violation. In this
series we resolve this issue as follows:

* Set the 'deny' bit (bit 30) for all OA registers, ensuring OA registers
  are not whitelisted by default after probe/reset/restart
* Reset the 'deny' bit when an OA stream is opened and certain conditions
  are met, whitelisting OA registers only for the duration when OA streams
  are open for a gt
* Set the 'deny' bit again, when OA streams are closed
* To manage this scheme, separate out OA whitelists from non-OA whitelists
  (into separate save-restore lists)

Ashutosh Dixit (9):
  drm/xe/rtp: Add RING_FORCE_TO_NONPRIV_DENY to OA whitelists
  drm/xe/rtp: Maintain OA whitelists separately
  drm/xe/rtp: Keep track of non-OA nonpriv slots
  drm/xe/rtp: Generalize whitelist_apply_to_hwe
  drm/xe/rtp: Save OA nonpriv registers to register save/restore lists
  drm/xe/rtp: Toggle 'deny' bit to (de-)whitelist OA regs
  drm/xe/rtp: (De-)whitelist OA registers for all hwe's for a gt
  drm/xe/oa: (De-)whitelist OA registers on OA stream open/release
  drm/xe/rtp: Ensure locking/ref counting for OA whitelists

 drivers/gpu/drm/xe/xe_gt_debugfs.c      |  4 +-
 drivers/gpu/drm/xe/xe_hw_engine.c       |  2 +
 drivers/gpu/drm/xe/xe_hw_engine_types.h |  8 +++
 drivers/gpu/drm/xe/xe_oa.c              |  7 ++
 drivers/gpu/drm/xe/xe_oa_types.h        |  3 +
 drivers/gpu/drm/xe/xe_reg_whitelist.c   | 92 ++++++++++++++++++++++---
 drivers/gpu/drm/xe/xe_reg_whitelist.h   |  4 ++
 7 files changed, 111 insertions(+), 9 deletions(-)

-- 
2.54.0


^ permalink raw reply	[flat|nested] 34+ messages in thread

end of thread, other threads:[~2026-06-03 18:49 UTC | newest]

Thread overview: 34+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2026-05-18 23:47 [PATCH 0/9] Don't whitelist OA registers unconditionally Ashutosh Dixit
2026-05-18 23:47 ` [PATCH 1/9] drm/xe/rtp: Add RING_FORCE_TO_NONPRIV_DENY to OA whitelists Ashutosh Dixit
2026-05-21 23:14   ` Umesh Nerlige Ramappa
2026-05-21 23:35     ` Dixit, Ashutosh
2026-05-26 19:12       ` Umesh Nerlige Ramappa
2026-05-27 20:03         ` Umesh Nerlige Ramappa
2026-05-29 19:12           ` Dixit, Ashutosh
2026-05-18 23:47 ` [PATCH 2/9] drm/xe/rtp: Maintain OA whitelists separately Ashutosh Dixit
2026-05-29 18:31   ` Umesh Nerlige Ramappa
2026-05-18 23:47 ` [PATCH 3/9] drm/xe/rtp: Keep track of non-OA nonpriv slots Ashutosh Dixit
2026-05-29 18:30   ` Umesh Nerlige Ramappa
2026-05-29 20:45     ` Dixit, Ashutosh
2026-05-29 23:24       ` Umesh Nerlige Ramappa
2026-05-30  1:51         ` Dixit, Ashutosh
2026-05-18 23:47 ` [PATCH 4/9] drm/xe/rtp: Generalize whitelist_apply_to_hwe Ashutosh Dixit
2026-05-18 23:47 ` [PATCH 5/9] drm/xe/rtp: Save OA nonpriv registers to register save/restore lists Ashutosh Dixit
2026-05-27 22:00   ` Umesh Nerlige Ramappa
2026-05-29 20:45     ` Dixit, Ashutosh
2026-05-18 23:47 ` [PATCH 6/9] drm/xe/rtp: Toggle 'deny' bit to (de-)whitelist OA regs Ashutosh Dixit
2026-05-29 18:33   ` Umesh Nerlige Ramappa
2026-05-18 23:47 ` [PATCH 7/9] drm/xe/rtp: (De-)whitelist OA registers for all hwe's for a gt Ashutosh Dixit
2026-05-27 21:49   ` Umesh Nerlige Ramappa
2026-05-29 23:03     ` Dixit, Ashutosh
2026-06-02 22:47       ` Umesh Nerlige Ramappa
2026-06-03 18:49         ` Dixit, Ashutosh
2026-05-18 23:47 ` [PATCH 8/9] drm/xe/oa: (De-)whitelist OA registers on OA stream open/release Ashutosh Dixit
2026-05-29 18:35   ` Umesh Nerlige Ramappa
2026-05-18 23:47 ` [PATCH 9/9] drm/xe/rtp: Ensure locking/ref counting for OA whitelists Ashutosh Dixit
2026-05-27 20:04   ` Umesh Nerlige Ramappa
2026-06-01 23:30     ` Dixit, Ashutosh
2026-05-18 23:54 ` ✓ CI.KUnit: success for Don't whitelist OA registers unconditionally Patchwork
2026-05-19  1:05 ` ✓ Xe.CI.BAT: " Patchwork
2026-05-19  8:32 ` ✗ Xe.CI.FULL: failure " Patchwork
2026-05-27 19:53 ` [PATCH 0/9] " Demi Marie Obenour

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