[Intel-gfx] [PATCH] drm/i915/execlists: Terminate the context image with BB_END

[Chris Wilson]

In the aub trace utility, the context images are terminated with a
MI_BATCH_BUFFER_END; the simulator is reported as complaining otherwise.
Do the same for our protocontext image for completeness, and in passing
apply the magic bit for gen10 to mark the end of the context image.

Reported-by: Lionel Landwerlin <lionel.g.landwerlin at intel.com>
Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
Cc: Lionel Landwerlin <lionel.g.landwerlin at intel.com>
---
Let's see what breaks!
-Chris
---
 drivers/gpu/drm/i915/intel_lrc.c     | 4 ++++
 drivers/gpu/drm/i915/intel_lrc_reg.h | 2 +-
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c
index fad689efb67a..1904d2e27019 100644
--- a/drivers/gpu/drm/i915/intel_lrc.c
+++ b/drivers/gpu/drm/i915/intel_lrc.c
@@ -2653,6 +2653,10 @@ static void execlists_init_reg_state(u32 *regs,
 
 		i915_oa_init_reg_state(engine, ctx, regs);
 	}
+
+	regs[CTX_BBE_END] = MI_BATCH_BUFFER_END;
+	if (INTEL_GEN(dev_priv) >= 10)
+		regs[CTX_BBE_END] |= BIT(0);
 }
 
 static int
diff --git a/drivers/gpu/drm/i915/intel_lrc_reg.h b/drivers/gpu/drm/i915/intel_lrc_reg.h
index 169a2239d6c7..b08bdbfc96f1 100644
--- a/drivers/gpu/drm/i915/intel_lrc_reg.h
+++ b/drivers/gpu/drm/i915/intel_lrc_reg.h
@@ -37,7 +37,7 @@
 #define CTX_PDP0_LDW			0x32
 #define CTX_LRI_HEADER_2		0x41
 #define CTX_R_PWR_CLK_STATE		0x42
-#define CTX_GPGPU_CSR_BASE_ADDRESS	0x44
+#define CTX_BB_END			0x44
 
 #define CTX_REG(reg_state, pos, reg, val) do { \
 	u32 *reg_state__ = (reg_state); \
-- 
2.18.0