[Intel-gfx] [PATCH] drm/i915/gt: Clear the whole first page of LRC on gen9

[Chris Wilson]

Try clearing the whole first page of the LRC on gen9, just in case HW
tries peeking at the poisoned data.

Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala at linux.intel.com>
---
 drivers/gpu/drm/i915/gt/intel_lrc.c | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/intel_lrc.c b/drivers/gpu/drm/i915/gt/intel_lrc.c
index 2d6b41e66b16..bf0c5a998428 100644
--- a/drivers/gpu/drm/i915/gt/intel_lrc.c
+++ b/drivers/gpu/drm/i915/gt/intel_lrc.c
@@ -549,7 +549,7 @@ static void set_offsets(u32 *regs,
 	}
 
 	if (clear) {
-		u8 count = *++data;
+		unsigned int count = *++data * 16u;
 
 		/* Clear past the tail for HW access */
 		GEM_BUG_ON(dword_in_page(regs) > count);
@@ -594,7 +594,7 @@ static const u8 gen8_xcs_offsets[] = {
 	REG16(0x200),
 	REG(0x028),
 
-	END(80)
+	END(5)
 };
 
 static const u8 gen9_xcs_offsets[] = {
@@ -678,7 +678,7 @@ static const u8 gen9_xcs_offsets[] = {
 	REG16(0x67c),
 	REG(0x068),
 
-	END(176)
+	END(64)
 };
 
 static const u8 gen12_xcs_offsets[] = {
@@ -710,7 +710,7 @@ static const u8 gen12_xcs_offsets[] = {
 	REG16(0x274),
 	REG16(0x270),
 
-	END(80)
+	END(5)
 };
 
 static const u8 gen8_rcs_offsets[] = {
@@ -747,7 +747,7 @@ static const u8 gen8_rcs_offsets[] = {
 	LRI(1, 0),
 	REG(0x0c8),
 
-	END(80)
+	END(5)
 };
 
 static const u8 gen9_rcs_offsets[] = {
@@ -831,7 +831,7 @@ static const u8 gen9_rcs_offsets[] = {
 	REG16(0x67c),
 	REG(0x68),
 
-	END(176)
+	END(64)
 };
 
 static const u8 gen11_rcs_offsets[] = {
@@ -872,7 +872,7 @@ static const u8 gen11_rcs_offsets[] = {
 	LRI(1, 0),
 	REG(0x0c8),
 
-	END(80)
+	END(5)
 };
 
 static const u8 gen12_rcs_offsets[] = {
@@ -913,7 +913,7 @@ static const u8 gen12_rcs_offsets[] = {
 	LRI(1, 0),
 	REG(0x0c8),
 
-	END(80)
+	END(5)
 };
 
 #undef END
-- 
2.25.0