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| author | Ashutosh Dixit <ashutosh.dixit@intel.com> | 2026-06-15 15:42:23 -0700 |
|---|---|---|
| committer | Ashutosh Dixit <ashutosh.dixit@intel.com> | 2026-06-22 12:28:34 -0700 |
| commit | 3a3c3e56db2923daaf1a5353cd6463a4cdaf4ffa (patch) | |
| tree | a3c8a99811d1a6381c3bed8d390058a7839d8133 | |
| parent | c3ff77d7235ccef7a0883c2fd981f70ef3aafd21 (diff) | |
| download | linux-next-3a3c3e56db2923daaf1a5353cd6463a4cdaf4ffa.tar.gz linux-next-3a3c3e56db2923daaf1a5353cd6463a4cdaf4ffa.zip | |
drm/xe/rtp: Save OA nonpriv registers to register save/restore lists
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: 828a8eaf37c3 ("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
| -rw-r--r-- | drivers/gpu/drm/xe/xe_reg_whitelist.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/gpu/drm/xe/xe_reg_whitelist.c b/drivers/gpu/drm/xe/xe_reg_whitelist.c index e9d0a0b82527..76ac23644a4d 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); } /** |