[PATCH 02/10] drm/xe/rtp: Add "always true" match function

Matt Roper
2026-04-23T22:49:09Z

All RTP table entries are required to have at least one rule. In cases
where an entry should apply unconditionally across all platforms we've
been using a graphics version range of 12.00 - forever since this covers
all platforms supported by the driver. However if the primary GT is
disabled via configfs (not actually possible today, but probably
possible in the future) or if we have a future platform that lacks a
primary GT and only supports media/display, this rule would cause
important programming to fail to apply on the media GT.

Add a simple match function that just always returns true
unconditionally. This solves the worries above while also being more
immediately human-readable.

Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
---
drivers/gpu/drm/xe/xe_hw_engine.c | 2 +-
drivers/gpu/drm/xe/xe_rtp.c | 7 +++++++
drivers/gpu/drm/xe/xe_rtp.h | 12 ++++++++++++
3 files changed, 20 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/xe/xe_hw_engine.c b/drivers/gpu/drm/xe/xe_hw_engine.c
index 3d9931f54cee..48cb52a1ec2d 100644
--- a/drivers/gpu/drm/xe/xe_hw_engine.c
+++ b/drivers/gpu/drm/xe/xe_hw_engine.c
@@ -430,7 +430,7 @@ hw_engine_setup_default_state(struct xe_hw_engine *hwe)
struct xe_rtp_process_ctx ctx = XE_RTP_PROCESS_CTX_INITIALIZER(hwe);
const struct xe_rtp_entry_sr engine_entries[] = {
{ XE_RTP_NAME("RING_CMD_CCTL_default_MOCS"),
- XE_RTP_RULES(GRAPHICS_VERSION_RANGE(1200, XE_RTP_END_VERSION_UNDEFINED)),
+ XE_RTP_RULES(FUNC(xe_rtp_match_always)),
XE_RTP_ACTIONS(FIELD_SET(RING_CMD_CCTL(0),
CMD_CCTL_WRITE_OVERRIDE_MASK |
CMD_CCTL_READ_OVERRIDE_MASK,
diff --git a/drivers/gpu/drm/xe/xe_rtp.c b/drivers/gpu/drm/xe/xe_rtp.c
index 991f218f1cc3..728933a1c34f 100644
--- a/drivers/gpu/drm/xe/xe_rtp.c
+++ b/drivers/gpu/drm/xe/xe_rtp.c
@@ -352,6 +352,13 @@ void xe_rtp_process(struct xe_rtp_process_ctx *ctx,
}
EXPORT_SYMBOL_IF_KUNIT(xe_rtp_process);

+bool xe_rtp_match_always(const struct xe_device *xe,
+ const struct xe_gt *gt,
+ const struct xe_hw_engine *hwe)
+{
+ return true;
+}
+
bool xe_rtp_match_even_instance(const struct xe_device *xe,
const struct xe_gt *gt,
const struct xe_hw_engine *hwe)
diff --git a/drivers/gpu/drm/xe/xe_rtp.h b/drivers/gpu/drm/xe/xe_rtp.h
index 4537ff46a17f..d058a629cd3e 100644
--- a/drivers/gpu/drm/xe/xe_rtp.h
+++ b/drivers/gpu/drm/xe/xe_rtp.h
@@ -459,6 +459,18 @@ void xe_rtp_process(struct xe_rtp_process_ctx *ctx,

/* Match functions to be used with XE_RTP_MATCH_FUNC */

+/**
+ * xe_rtp_match_always - Match RTP entry unconditionally
+ * @xe: Device structure
+ * @gt: GT structure
+ * @hwe: Engine instance
+ *
+ * Returns: true, regardless of inputs
+ */
+bool xe_rtp_match_always(const struct xe_device *xe,
+ const struct xe_gt *gt,
+ const struct xe_hw_engine *hwe);
+
/**
* xe_rtp_match_even_instance - Match if engine instance is even
* @xe: Device structure

--
2.53.0