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drm/xe/rtp: Save OA nonpriv registers to register save/restore lists

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Now we can save OA whitelisting nonpriv registers to register save/restore
lists. OA nonpriv registers are saved to both hwe->oa_sr as well as
hwe->reg_sr.

During probe, resume and gt-reset flows KMD will apply hwe->reg_sr,
ensuring OA registers are de-whitelisted after these events. For
engine-reset, hwe->reg_sr is registered with GuC and GuC will apply these
registers, ensuring OA registers are de-whitelisted after engine resets.

hwe->oa_sr is used for whitelisting or de-whitelisting OA registers during
OA operation, by toggling the 'deny' bit on oa stream open/close.

Fixes: 828a8eaf37 ("drm/xe/oa: Add MMIO trigger support")
Cc: stable@vger.kernel.org # v6.12+
Signed-off-by: Ashutosh Dixit <ashutosh.dixit@intel.com>
Reviewed-by: Umesh Nerlige Ramappa <umesh.nerlige.ramappa@intel.com>
Link: https://patch.msgid.link/20260615224227.34880-6-ashutosh.dixit@intel.com
This commit is contained in:
Ashutosh Dixit
2026-06-15 15:42:23 -07:00
parent c3ff77d723
commit 3a3c3e56db
1 changed files with 12 additions and 0 deletions
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12
drivers/gpu/drm/xe/xe_reg_whitelist.c
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@@ -215,6 +215,18 @@ void xe_reg_whitelist_process_engine(struct xe_hw_engine *hwe)
first_oa_slot = whitelist_apply_to_hwe(hwe, &hwe->reg_whitelist, &hwe->reg_sr, 0);
xe_rtp_process_to_sr(&ctx, &oa_whitelist, &hwe->oa_whitelist, false);
/*
* Save oa nonpriv registers to hwe->oa_sr, from which oa registers are whitelisted
* or de-whitelisted, by toggling the 'deny' bit on oa stream open/close
*/
whitelist_apply_to_hwe(hwe, &hwe->oa_whitelist, &hwe->oa_sr, first_oa_slot);
/*
* Also save oa nonpriv registers to hwe->reg_sr, to ensure oa registers are not
* whitelisted by default after probe, gt reset, resume and engine reset
*/
whitelist_apply_to_hwe(hwe, &hwe->oa_whitelist, &hwe->reg_sr, first_oa_slot);
}
/**