[PATCH v3 5/9] drm/xe/rtp: Save OA nonpriv registers to register save/restore lists

[Ashutosh Dixit <ashutosh.dixit@intel.com>]

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.

v2: Provide more details in commit message (Umesh)

Signed-off-by: Ashutosh Dixit <ashutosh.dixit@intel.com>
Reviewed-by: Umesh Nerlige Ramappa <umesh.nerlige.ramappa@intel.com>
---
 drivers/gpu/drm/xe/xe_reg_whitelist.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/gpu/drm/xe/xe_reg_whitelist.c b/drivers/gpu/drm/xe/xe_reg_whitelist.c
index e9d0a0b82527d..76ac23644a4df 100644
--- a/drivers/gpu/drm/xe/xe_reg_whitelist.c
+++ b/drivers/gpu/drm/xe/xe_reg_whitelist.c
@@ -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);
 }
 
 /**
-- 
2.54.0