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[103.229.16.4]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-87c31ee8a87sm127187b3a.11.2026.09.21.20.09.42 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 21 Sep 2026 20:09:45 -0700 (PDT) From: Jie Gan Date: Tue, 22 Sep 2026 11:09:31 +0800 Subject: [PATCH] arm64: dts: qcom: shikra: Switch CPU ETMs to MMIO-based probing Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20260922-fix-etm-probe-issue-on-shikra-v1-1-56d25e9bbe17@oss.qualcomm.com> X-B4-Tracking: v=1; b=H4sIAGvxsWoC/x2MQQrCQAwAv1JybqBGt7b9SvGwataG4m5JVISlf zd4HIaZCsYqbDA1FZQ/YlKyw6Ft4LbE/GCUuzNQR303EmGSL/LriZuWq0uzN2PJaIusGjHEnk4 pDMfxHMAfm7IH//982fcfVbdc628AAAA= To: Bjorn Andersson , Konrad Dybcio , Abel Vesa , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Jie Gan Cc: Konrad Dybcio , linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Jie Gan X-Mailer: b4 0.14.0 X-Developer-Signature: v=1; a=ed25519-sha256; t=1790046582; l=4900; i=jie.gan@oss.qualcomm.com; s=20250909; h=from:subject:message-id; bh=4ZkQd5DiIIhD0iP7qgKaOwYrBqewdiXyq1XFysgGpsg=; b=5XoV3A8QTdDV9bDHnFyyz5SyhyvsLEqybRh3XplUgY12xmSkgUt3rEZRUGjIcgjofJBOAmfTN rolfhvX67iICenIYXoXP/xS0N5z/7HfUt1hzhr0p2ApLIb7iCo8he3D X-Developer-Key: i=jie.gan@oss.qualcomm.com; a=ed25519; pk=3LxxUZRPCNkvPDlWOvXfJNqNO4SfGdy3eghMb8puHuk= X-Proofpoint-ORIG-GUID: 6tEb9YDWy3uMZyclmekInJdAxzkq-VZn X-Proofpoint-GUID: 6tEb9YDWy3uMZyclmekInJdAxzkq-VZn X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwOTIyMDA0MiBTYWx0ZWRfXwqGTX7dk2Emq IkXuC4GRpmazQF24RP/P7e33/c939FVhJTlZvTFOnsT26FTEdXX9G709dFthzhaamtv4F86timL EWDBkx6zLz6w9SSeXf4wMEKwl7XC55Z0tzIrqmlxkuXoLYaKt4po5o0wQrCnuH8X7i2c4DUAq63 qoLBi3Q99iqcDe5vuy+F+AqzKCNdbxCs52Gy/z+FTISK1Z3wVAxA3VkxKomgZ51CFuGGMhk2VC6 3I54oJKDj7LnF3TkWE3zyGPbNprGaO391GDPyIrEAm60dnn83tUUZHAeEnwneZidsjNqrHXkowR dmbcZ+N9pNxFcI5lAarbSH7qX5NXbNm8x+yCyqwcr33Zj03Qbm9GWPJ97VAzDylKkHbgMPqW9FA 8MqwQFCDFWgJ6DMzHObTBW9NNG821PP+C+9tdY+J0Cw/soqxJn9pUtSVJpMCYhaSssnWSybyhHw Bn7jIld5PPdPIpD7vig== X-Proofpoint-Spam-Info: AW1haW4tMjYwOTIyMDA0MiBTYWx0ZWRfXwcgFYe1Txy/s j/7QsZOximU8651E4uADffVqALZDUeumXXwNjIREBIMjJkuHqdGrBBPDBt3x/UQxsfO0y6eD34t d3h9uVlwjtcr9LEeRyMuMj9d894rVf0= X-Authority-Analysis: v=2.4 cv=TvFzFzXh c=1 sm=1 tr=0 ts=6ab1f17b cx=c_pps a=mDZGXZTwRPZaeRUbqKGCBw==:117 a=nuhDOHQX5FNHPW3J6Bj6AA==:17 a=IkcTkHD0fZMA:10 a=VdqzKS8jKosA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=YMgV9FUhrdKAYTUUvYB2:22 a=EUspDBNiAAAA:8 a=YyAnXQyPezYHqYzMlv0A:9 a=QEXdDO2ut3YA:10 a=zc0IvFSfCIW2DFIPzwfm:22 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-09-21_07,2026-09-21_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 adultscore=0 priorityscore=1501 suspectscore=0 malwarescore=0 lowpriorityscore=0 phishscore=0 bulkscore=0 clxscore=1015 spamscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2609040000 definitions=main-2609220042 The etm0-etm3 nodes are declared with "arm,coresight-etm4x-sysreg" but do not implement self-hosted system-register trace access on this SoC: ID_AA64DFR0_EL1.TraceVer reads as 0 on the affected CPUs, so etm4_init_sysreg_access() correctly reports the access mechanism as unavailable and the ETMv4 driver fails to probe with -EINVAL. The CPU ETMs have a memory-mapped aperture, so switch each node to the standard "arm,coresight-etm4x", "arm,primecell" compatible with its MMIO reg range. Fixes: eed738c6dd0c ("arm64: dts: qcom: shikra: Add coresight nodes") Signed-off-by: Jie Gan --- Signed-off-by: Jie Gan --- arch/arm64/boot/dts/qcom/shikra.dtsi | 140 ++++++++++++++++++-------------= ---- 1 file changed, 72 insertions(+), 68 deletions(-) diff --git a/arch/arm64/boot/dts/qcom/shikra.dtsi b/arch/arm64/boot/dts/qco= m/shikra.dtsi index c1f06f692f66..62bacf749241 100644 --- a/arch/arm64/boot/dts/qcom/shikra.dtsi +++ b/arch/arm64/boot/dts/qcom/shikra.dtsi @@ -164,74 +164,6 @@ eud_in: endpoint { }; }; =20 - etm0 { - compatible =3D "arm,coresight-etm4x-sysreg"; - - clocks =3D <&rpmcc RPM_SMD_QDSS_CLK>; - clock-names =3D "apb_pclk"; - cpu =3D <&cpu0>; - qcom,skip-power-up; - - out-ports { - port { - etm0_out: endpoint { - remote-endpoint =3D <&funnel_cpuss0_in0>; - }; - }; - }; - }; - - etm1 { - compatible =3D "arm,coresight-etm4x-sysreg"; - - clocks =3D <&rpmcc RPM_SMD_QDSS_CLK>; - clock-names =3D "apb_pclk"; - cpu =3D <&cpu1>; - qcom,skip-power-up; - - out-ports { - port { - etm1_out: endpoint { - remote-endpoint =3D <&funnel_cpuss0_in1>; - }; - }; - }; - }; - - etm2 { - compatible =3D "arm,coresight-etm4x-sysreg"; - - clocks =3D <&rpmcc RPM_SMD_QDSS_CLK>; - clock-names =3D "apb_pclk"; - cpu =3D <&cpu2>; - qcom,skip-power-up; - - out-ports { - port { - etm2_out: endpoint { - remote-endpoint =3D <&funnel_cpuss0_in2>; - }; - }; - }; - }; - - etm3 { - compatible =3D "arm,coresight-etm4x-sysreg"; - - clocks =3D <&rpmcc RPM_SMD_QDSS_CLK>; - clock-names =3D "apb_pclk"; - cpu =3D <&cpu3>; - qcom,skip-power-up; - - out-ports { - port { - etm3_out: endpoint { - remote-endpoint =3D <&funnel_cpuss0_in3>; - }; - }; - }; - }; - firmware { scm { compatible =3D "qcom,scm-shikra", "qcom,scm"; @@ -3218,6 +3150,24 @@ cti@9020000 { label =3D "cti_apss_pe0"; }; =20 + etm@9040000 { + compatible =3D "arm,coresight-etm4x", "arm,primecell"; + reg =3D <0x0 0x09040000 0x0 0x1000>; + + clocks =3D <&rpmcc RPM_SMD_QDSS_CLK>; + clock-names =3D "apb_pclk"; + cpu =3D <&cpu0>; + qcom,skip-power-up; + + out-ports { + port { + etm0_out: endpoint { + remote-endpoint =3D <&funnel_cpuss0_in0>; + }; + }; + }; + }; + cti@90e0000 { compatible =3D "arm,coresight-cti", "arm,primecell"; reg =3D <0x0 0x090e0000 0x0 0x1000>; @@ -3236,6 +3186,24 @@ cti@9120000 { label =3D "cti_apss_pe1"; }; =20 + etm@9140000 { + compatible =3D "arm,coresight-etm4x", "arm,primecell"; + reg =3D <0x0 0x09140000 0x0 0x1000>; + + clocks =3D <&rpmcc RPM_SMD_QDSS_CLK>; + clock-names =3D "apb_pclk"; + cpu =3D <&cpu1>; + qcom,skip-power-up; + + out-ports { + port { + etm1_out: endpoint { + remote-endpoint =3D <&funnel_cpuss0_in1>; + }; + }; + }; + }; + cti@9220000 { compatible =3D "arm,coresight-cti", "arm,primecell"; reg =3D <0x0 0x09220000 0x0 0x1000>; @@ -3245,6 +3213,24 @@ cti@9220000 { label =3D "cti_apss_pe2"; }; =20 + etm@9240000 { + compatible =3D "arm,coresight-etm4x", "arm,primecell"; + reg =3D <0x0 0x09240000 0x0 0x1000>; + + clocks =3D <&rpmcc RPM_SMD_QDSS_CLK>; + clock-names =3D "apb_pclk"; + cpu =3D <&cpu2>; + qcom,skip-power-up; + + out-ports { + port { + etm2_out: endpoint { + remote-endpoint =3D <&funnel_cpuss0_in2>; + }; + }; + }; + }; + cti@9320000 { compatible =3D "arm,coresight-cti", "arm,primecell"; reg =3D <0x0 0x09320000 0x0 0x1000>; @@ -3254,6 +3240,24 @@ cti@9320000 { label =3D "cti_apss_pe3"; }; =20 + etm@9340000 { + compatible =3D "arm,coresight-etm4x", "arm,primecell"; + reg =3D <0x0 0x09340000 0x0 0x1000>; + + clocks =3D <&rpmcc RPM_SMD_QDSS_CLK>; + clock-names =3D "apb_pclk"; + cpu =3D <&cpu3>; + qcom,skip-power-up; + + out-ports { + port { + etm3_out: endpoint { + remote-endpoint =3D <&funnel_cpuss0_in3>; + }; + }; + }; + }; + funnel@9800000 { compatible =3D "arm,coresight-dynamic-funnel", "arm,primecell"; reg =3D <0x0 0x09800000 0x0 0x1000>; --- base-commit: 5c4d4169604b335c38bbc79bc1fc03042981fc6f change-id: 20260922-fix-etm-probe-issue-on-shikra-5a624f583975 Best regards, --=20 Jie Gan