From: Ruiqiang Hao <ruiqiang....@windriver.com>
The tweak of TRCIDR1 introduced by commit 233b9a7d036d ("coresight:
etm4x: Add support for Marvell OcteonTX2") was dropped by commit
7b579662e78d (coresight: etm4x: Drop the useless tweak of TRCIDR1),
This will loss the original Ignore Packet feature, so we use a tweak
of TRCDEVARCH to support this feature again.
Signed-off-by: Ruiqiang Hao <ruiqiang....@windriver.com>
---
drivers/hwtracing/coresight/coresight-etm4x-core.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/drivers/hwtracing/coresight/coresight-etm4x-core.c
b/drivers/hwtracing/coresight/coresight-etm4x-core.c
index d5d1136ab83d..9c01ed6b4b8a 100644
--- a/drivers/hwtracing/coresight/coresight-etm4x-core.c
+++ b/drivers/hwtracing/coresight/coresight-etm4x-core.c
@@ -990,6 +990,15 @@ static bool etm4_init_iomem_access(struct etmv4_drvdata
*drvdata,
{
u32 devarch = readl_relaxed(drvdata->base + TRCDEVARCH);
+ /* OcteonTX2 hardware reports version as ETMv4.2 but it supports
+ * Ignore Packet feature of ETMv4.3. Hence, treat this as comaptible
+ * with ETMv4.3.
+ */
+ if (drvdata->etm_quirks & CORESIGHT_QUIRK_ETM_TREAT_ETMv43) {
+ devarch &= ~ETM_DEVARCH_REVISION_MASK;
+ devarch |= 0x3 << ETM_DEVARCH_REVISION_SHIFT;
+ }
+
/*
* All ETMs must implement TRCDEVARCH to indicate that
* the component is an ETMv4. Even though TRCIDR1 also
--
2.39.2
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