[PATCH 4/4] drm/xe/oa: Stop whitelisting OAG registers after Xe3

[Matt Roper <matthew.d.roper@intel.com>]

According to Xe2 and beyond's hardware design, userspace does not need
access to OAG_OAHEADPTR, OAG_OATAILPTR, OAG_OABUFFER, or
OAG_OASTARTTRIG_COUNTER; the hardware deliberately blocks userspace
access to these registers and adding them to our software whitelist was
a mistake.  However since they're already on the software list, it's
possible that userspace software has developed an unwanted dependency on
them and that removal of access now could break userspace.  So while we
investigate further to determine whether removal is safe or not, let's
add an upper bound to prevent the mistake from spreading further past
our current Xe3 platforms.

Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
---
 drivers/gpu/drm/xe/xe_reg_whitelist.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/xe/xe_reg_whitelist.c b/drivers/gpu/drm/xe/xe_reg_whitelist.c
index 99956c3574f9..5f8f78f0f1f5 100644
--- a/drivers/gpu/drm/xe/xe_reg_whitelist.c
+++ b/drivers/gpu/drm/xe/xe_reg_whitelist.c
@@ -107,14 +107,14 @@ static const struct xe_rtp_entry_sr register_whitelist[] = {
 	WHITELIST_OA_MMIO_TRG(OAMERT_STATUS, OAMERT_HEAD_POINTER)
 
 	{ XE_RTP_NAME("oag_mmio_trg_rcs"),
-	  XE_RTP_RULES(GRAPHICS_VERSION_RANGE(1200, XE_RTP_END_VERSION_UNDEFINED),
+	  XE_RTP_RULES(GRAPHICS_VERSION_RANGE(1200, 3099),
 		       ENGINE_CLASS(RENDER)),
 	  XE_RTP_ACTIONS(WHITELIST(OAG_OAHEADPTR,
 				   RING_FORCE_TO_NONPRIV_ACCESS_RD |
 				   RING_FORCE_TO_NONPRIV_RANGE_4))
 	},
 	{ XE_RTP_NAME("oag_mmio_trg_ccs"),
-	  XE_RTP_RULES(GRAPHICS_VERSION_RANGE(1200, XE_RTP_END_VERSION_UNDEFINED),
+	  XE_RTP_RULES(GRAPHICS_VERSION_RANGE(1200, 3099),
 		       ENGINE_CLASS(COMPUTE)),
 	  XE_RTP_ACTIONS(WHITELIST(OAG_OAHEADPTR,
 				   RING_FORCE_TO_NONPRIV_ACCESS_RD |
-- 
2.52.0