linux-kernel - [PATCH] firmware: qcom: tzmem: disable sc7180 platform

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Message-Id: <20250721-sc7180-shm-hang-v1-1-99ad9ffeb5b4@trvn.ru>
Date: Mon, 21 Jul 2025 18:28:03 +0500
From: Nikita Travkin <nikita@...n.ru>
To: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>, 
 Bjorn Andersson <andersson@...nel.org>, 
 Konrad Dybcio <konradybcio@...nel.org>
Cc: linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org, 
 Nikita Travkin <nikita@...n.ru>
Subject: [PATCH] firmware: qcom: tzmem: disable sc7180 platform

When SHM bridge is enabled, assigning RMTFS memory causes the calling
core to hang if the system is running in EL1.

Disable SHM bridge on sc7180 devices to avoid that hang.

Signed-off-by: Nikita Travkin <nikita@...n.ru>
---
 drivers/firmware/qcom/qcom_tzmem.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/firmware/qcom/qcom_tzmem.c b/drivers/firmware/qcom/qcom_tzmem.c
index ea0a35355657064b1c08a6ebed7cfb483a60dd3f..12e448669b8bd24ed312d0aa7b6a2b0042f762de 100644
--- a/drivers/firmware/qcom/qcom_tzmem.c
+++ b/drivers/firmware/qcom/qcom_tzmem.c
@@ -77,6 +77,7 @@ static bool qcom_tzmem_using_shm_bridge;
 
 /* List of machines that are known to not support SHM bridge correctly. */
 static const char *const qcom_tzmem_blacklist[] = {
+	"qcom,sc7180", /* hang in rmtfs memory assignment */
 	"qcom,sc8180x",
 	"qcom,sdm670", /* failure in GPU firmware loading */
 	"qcom,sdm845", /* reset in rmtfs memory assignment */

---
base-commit: 97987520025658f30bb787a99ffbd9bbff9ffc9d
change-id: 20250721-sc7180-shm-hang-a0d6650ae5a4

Best regards,
-- 
Nikita Travkin <nikita@...n.ru>