{"id":2223753,"url":"http://patchwork.ozlabs.org/api/1.1/patches/2223753/?format=json","web_url":"http://patchwork.ozlabs.org/project/uboot/patch/20260416070330.3006528-2-varadarajan.narayanan@oss.qualcomm.com/","project":{"id":18,"url":"http://patchwork.ozlabs.org/api/1.1/projects/18/?format=json","name":"U-Boot","link_name":"uboot","list_id":"u-boot.lists.denx.de","list_email":"u-boot@lists.denx.de","web_url":null,"scm_url":null,"webscm_url":null},"msgid":"<20260416070330.3006528-2-varadarajan.narayanan@oss.qualcomm.com>","date":"2026-04-16T07:03:26","name":"[v7,1/5] arm: psci: Add API to check for support of specific PSCI function","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"c3ab5db4c402f2793b2e268f5e41a82ac4382a21","submitter":{"id":92283,"url":"http://patchwork.ozlabs.org/api/1.1/people/92283/?format=json","name":"Varadarajan Narayanan","email":"varadarajan.narayanan@oss.qualcomm.com"},"delegate":{"id":151538,"url":"http://patchwork.ozlabs.org/api/1.1/users/151538/?format=json","username":"kcxt","first_name":"Casey","last_name":"Connolly","email":"casey.connolly@linaro.org"},"mbox":"http://patchwork.ozlabs.org/project/uboot/patch/20260416070330.3006528-2-varadarajan.narayanan@oss.qualcomm.com/mbox/","series":[{"id":500084,"url":"http://patchwork.ozlabs.org/api/1.1/series/500084/?format=json","web_url":"http://patchwork.ozlabs.org/project/uboot/list/?series=500084","date":"2026-04-16T07:03:25","name":"Implement reset to EDL for qcs9100","version":7,"mbox":"http://patchwork.ozlabs.org/series/500084/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/2223753/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2223753/checks/","tags":{},"headers":{"Return-Path":"","X-Original-To":"incoming@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=qualcomm.com header.i=@qualcomm.com header.a=rsa-sha256\n header.s=qcppdkim1 header.b=cG1TFVhr;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=oss.qualcomm.com header.i=@oss.qualcomm.com\n header.a=rsa-sha256 header.s=google header.b=U0yJYHwW;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.denx.de\n (client-ip=2a01:238:438b:c500:173d:9f52:ddab:ee01; helo=phobos.denx.de;\n envelope-from=u-boot-bounces@lists.denx.de; receiver=patchwork.ozlabs.org)","phobos.denx.de;\n dmarc=none (p=none dis=none) header.from=oss.qualcomm.com","phobos.denx.de;\n spf=pass smtp.mailfrom=u-boot-bounces@lists.denx.de","phobos.denx.de;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=qualcomm.com header.i=@qualcomm.com\n header.b=\"cG1TFVhr\";\n\tdkim=pass (2048-bit key;\n unprotected) header.d=oss.qualcomm.com header.i=@oss.qualcomm.com\n header.b=\"U0yJYHwW\";\n\tdkim-atps=neutral","phobos.denx.de; dmarc=none (p=none dis=none)\n header.from=oss.qualcomm.com","phobos.denx.de; spf=pass\n smtp.mailfrom=varadarajan.narayanan@oss.qualcomm.com"],"Received":["from phobos.denx.de (phobos.denx.de\n [IPv6:2a01:238:438b:c500:173d:9f52:ddab:ee01])\n\t(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)\n\t key-exchange x25519 server-signature ECDSA (secp384r1) server-digest SHA384)\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4fx8BQ3S49z1yDF\n\tfor ; Thu, 16 Apr 2026 17:03:58 +1000 (AEST)","from h2850616.stratoserver.net (localhost [IPv6:::1])\n\tby phobos.denx.de (Postfix) with ESMTP id A660684206;\n\tThu, 16 Apr 2026 09:03:55 +0200 (CEST)","by phobos.denx.de (Postfix, from userid 109)\n id 51179841D5; Thu, 16 Apr 2026 09:03:54 +0200 (CEST)","from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com\n [205.220.168.131])\n (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits))\n (No client certificate requested)\n by phobos.denx.de (Postfix) with ESMTPS id 1058F84201\n for ; Thu, 16 Apr 2026 09:03:51 +0200 (CEST)","from pps.filterd (m0279863.ppops.net [127.0.0.1])\n by mx0a-0031df01.pphosted.com (8.18.1.11/8.18.1.11) with ESMTP id\n 63G4TvF11554426\n for ; Thu, 16 Apr 2026 07:03:50 GMT","from mail-pl1-f199.google.com (mail-pl1-f199.google.com\n [209.85.214.199])\n by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 4djrsn8fbb-1\n (version=TLSv1.3 cipher=TLS_AES_128_GCM_SHA256 bits=128 verify=NOT)\n for ; Thu, 16 Apr 2026 07:03:50 +0000 (GMT)","by mail-pl1-f199.google.com with SMTP id\n d9443c01a7336-2b4654f9bb6so43951445ad.2\n for ; Thu, 16 Apr 2026 00:03:50 -0700 (PDT)","from hu-varada-blr.qualcomm.com\n (blr-bdr-fw-01_GlobalNAT_AllZones-Outside.qualcomm.com. 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neil.armstrong@linaro.org,\n sumit.garg@kernel.org, varadarajan.narayanan@oss.qualcomm.com,\n marek.vasut+renesas@mailbox.org, aswin.murugan@oss.qualcomm.com,\n simon.glass@canonical.com, tien.fong.chee@altera.com,\n michal.simek@amd.com, visitorckw@gmail.com, clamor95@gmail.com,\n u-boot@lists.denx.de, u-boot-qcom@groups.io","Cc":"Sumit Garg ","Subject":"[PATCH v7 1/5] arm: psci: Add API to check for support of specific\n PSCI function","Date":"Thu, 16 Apr 2026 12:33:26 +0530","Message-Id":"<20260416070330.3006528-2-varadarajan.narayanan@oss.qualcomm.com>","X-Mailer":"git-send-email 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a=JL+w9abYAAE89/QcEU+0QA==:117 a=Ou0eQOY4+eZoSc0qltEV5Q==:17\n a=A5OVakUREuEA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22\n a=u7WPNUs3qKkmUXheDGA7:22 a=yOCtJkima9RkubShWh1s:22 a=KKAkSRfTAAAA:8\n a=EUspDBNiAAAA:8 a=B_h1StgqK4FeiTQRNJUA:9 a=324X-CrmTo6CU4MGRt3R:22\n a=cvBusfyB2V15izCimMoJ:22","X-Proofpoint-Virus-Version":"vendor=baseguard\n engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49\n definitions=2026-04-16_02,2026-04-13_04,2025-10-01_01","X-Proofpoint-Spam-Details":"rule=outbound_notspam policy=outbound score=0\n priorityscore=1501 bulkscore=0 adultscore=0 spamscore=0 phishscore=0\n impostorscore=0 suspectscore=0 lowpriorityscore=0 malwarescore=0\n clxscore=1015 classifier=typeunknown authscore=0 authtc= authcc=\n route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2604070000\n definitions=main-2604160064","X-BeenThere":"u-boot@lists.denx.de","X-Mailman-Version":"2.1.39","Precedence":"list","List-Id":"U-Boot discussion ","List-Unsubscribe":",\n ","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n ","Errors-To":"u-boot-bounces@lists.denx.de","Sender":"\"U-Boot\" ","X-Virus-Scanned":"clamav-milter 0.103.8 at phobos.denx.de","X-Virus-Status":"Clean"},"content":"Add an API to check if a specific PSCI function is supported or not.\nThis is based on the psci_features() function present in Linux kernel\n(drivers/firmware/psci/psci.c).\n\nReviewed-by: Casey Connolly \nReviewed-by: Sumit Garg \nSigned-off-by: Varadarajan Narayanan \n---\n arch/arm/cpu/armv8/fwcall.c | 15 +++++++++++++++\n arch/arm/include/asm/system.h | 1 +\n 2 files changed, 16 insertions(+)","diff":"diff --git a/arch/arm/cpu/armv8/fwcall.c b/arch/arm/cpu/armv8/fwcall.c\nindex 87de09979b1..f834d770dd6 100644\n--- a/arch/arm/cpu/armv8/fwcall.c\n+++ b/arch/arm/cpu/armv8/fwcall.c\n@@ -129,3 +129,18 @@ void __noreturn psci_system_off(void)\n \twhile (1)\n \t\t;\n }\n+\n+int psci_features(u32 psci_func_id)\n+{\n+\tstruct pt_regs regs;\n+\n+\tregs.regs[0] = ARM_PSCI_1_0_FN_PSCI_FEATURES;\n+\tregs.regs[1] = psci_func_id;\n+\n+\tif (use_smc_for_psci)\n+\t\tsmc_call(®s);\n+\telse\n+\t\thvc_call(®s);\n+\n+\treturn regs.regs[0];\n+}\ndiff --git a/arch/arm/include/asm/system.h b/arch/arm/include/asm/system.h\nindex 9e3ad57073d..5ed6833c155 100644\n--- a/arch/arm/include/asm/system.h\n+++ b/arch/arm/include/asm/system.h\n@@ -342,6 +342,7 @@ void smc_call(struct pt_regs *args);\n void __noreturn psci_system_reset(void);\n void __noreturn psci_system_reset2(u32 reset_level, u32 cookie);\n void __noreturn psci_system_off(void);\n+int psci_features(u32 psci_func_id);\n \n #ifdef CONFIG_ARMV8_PSCI\n extern char __secure_start[];\n","prefixes":["v7","1/5"]}