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Wed, 29 Nov 2023 06:58:13 GMT Received: from blr-ubuntu-253.qualcomm.com (10.80.80.8) by nalasex01a.na.qualcomm.com (10.47.209.196) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.40; Tue, 28 Nov 2023 22:58:10 -0800 From: Sibi Sankar To: , CC: , , , , , , Sibi Sankar Subject: [PATCH 1/3] firmware: arm_scmi: Fix null pointer dereference during fastchannel init Date: Wed, 29 Nov 2023 12:27:46 +0530 Message-ID: <20231129065748.19871-2-quic_sibis@quicinc.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20231129065748.19871-1-quic_sibis@quicinc.com> References: <20231129065748.19871-1-quic_sibis@quicinc.com> MIME-Version: 1.0 X-Originating-IP: [10.80.80.8] X-ClientProxiedBy: nasanex01b.na.qualcomm.com (10.46.141.250) To nalasex01a.na.qualcomm.com (10.47.209.196) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-GUID: jSzMxAy31XFdUcrRMgglGV8GLxPqBZFx X-Proofpoint-ORIG-GUID: jSzMxAy31XFdUcrRMgglGV8GLxPqBZFx X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.997,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2023-11-29_03,2023-11-27_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 spamscore=0 phishscore=0 adultscore=0 priorityscore=1501 bulkscore=0 clxscore=1015 mlxscore=0 mlxlogscore=999 suspectscore=0 malwarescore=0 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2311060000 definitions=main-2311290049 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20231128_225822_752233_FDEC067A X-CRM114-Status: GOOD ( 16.88 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org The scmi_perf_domain_lookup requires the protocol handle to have the private data set, which is yet to happen during the fastchannel init scenario. This results in a null pointer dereference. Fix this by using the pre-populated perf_dom_info to pass on the required information instead. Call trace: scmi_perf_protocol_init+0x434/0x678 scmi_get_protocol_instance+0x168/0x29c scmi_devres_protocol_instance_get+0x50/0xa0 scmi_devm_protocol_get+0x20/0x50 scmi_cpufreq_probe+0x34/0xd4 scmi_dev_probe+0x28/0x3c really_probe+0x148/0x2ac __driver_probe_device+0x78/0x12c driver_probe_device+0x40/0x160 __device_attach_driver+0xb8/0x134 bus_for_each_drv+0x80/0xdc __device_attach+0xa8/0x1b0 device_initial_probe+0x14/0x20 bus_probe_device+0xa8/0xac device_add+0x5cc/0x778 device_register+0x20/0x30 __scmi_device_create.part.0+0xec/0x1cc scmi_device_create+0x180/0x1c4 scmi_create_protocol_devices+0x4c/0xb0 scmi_probe+0x660/0x738 platform_probe+0x68/0xdc really_probe+0x148/0x2ac __driver_probe_device+0x78/0x12c driver_probe_device+0x40/0x160 __device_attach_driver+0xb8/0x134 bus_for_each_drv+0x80/0xdc __device_attach+0xa8/0x1b0 device_initial_probe+0x14/0x20 bus_probe_device+0xa8/0xac deferred_probe_work_func+0x88/0xc0 process_one_work+0x13c/0x264 worker_thread+0x32c/0x438 kthread+0x118/0x11c ret_from_fork+0x10/0x20 Fixes: 619bc6e034f3 ("firmware: arm_scmi: Populate fastchannel info only if set operations are allowed") Signed-off-by: Sibi Sankar Reviewed-by: Cristian Marussi --- drivers/firmware/arm_scmi/perf.c | 19 +++++++------------ 1 file changed, 7 insertions(+), 12 deletions(-) diff --git a/drivers/firmware/arm_scmi/perf.c b/drivers/firmware/arm_scmi/perf.c index d1323c5d9c27..a648521e04a3 100644 --- a/drivers/firmware/arm_scmi/perf.c +++ b/drivers/firmware/arm_scmi/perf.c @@ -759,40 +759,35 @@ static int scmi_perf_level_limits_notify(const struct scmi_protocol_handle *ph, } static void scmi_perf_domain_init_fc(const struct scmi_protocol_handle *ph, - u32 domain, struct scmi_fc_info **p_fc) + struct perf_dom_info *dom) { struct scmi_fc_info *fc; - struct perf_dom_info *dom; - - dom = scmi_perf_domain_lookup(ph, domain); - if (IS_ERR(dom)) - return; fc = devm_kcalloc(ph->dev, PERF_FC_MAX, sizeof(*fc), GFP_KERNEL); if (!fc) return; ph->hops->fastchannel_init(ph, PERF_DESCRIBE_FASTCHANNEL, - PERF_LEVEL_GET, 4, domain, + PERF_LEVEL_GET, 4, dom->id, &fc[PERF_FC_LEVEL].get_addr, NULL); ph->hops->fastchannel_init(ph, PERF_DESCRIBE_FASTCHANNEL, - PERF_LIMITS_GET, 8, domain, + PERF_LIMITS_GET, 8, dom->id, &fc[PERF_FC_LIMIT].get_addr, NULL); if (dom->info.set_perf) ph->hops->fastchannel_init(ph, PERF_DESCRIBE_FASTCHANNEL, - PERF_LEVEL_SET, 4, domain, + PERF_LEVEL_SET, 4, dom->id, &fc[PERF_FC_LEVEL].set_addr, &fc[PERF_FC_LEVEL].set_db); if (dom->set_limits) ph->hops->fastchannel_init(ph, PERF_DESCRIBE_FASTCHANNEL, - PERF_LIMITS_SET, 8, domain, + PERF_LIMITS_SET, 8, dom->id, &fc[PERF_FC_LIMIT].set_addr, &fc[PERF_FC_LIMIT].set_db); - *p_fc = fc; + dom->fc_info = fc; } static int scmi_dvfs_device_opps_add(const struct scmi_protocol_handle *ph, @@ -1102,7 +1097,7 @@ static int scmi_perf_protocol_init(const struct scmi_protocol_handle *ph) scmi_perf_describe_levels_get(ph, dom, version); if (dom->perf_fastchannels) - scmi_perf_domain_init_fc(ph, dom->id, &dom->fc_info); + scmi_perf_domain_init_fc(ph, dom); } ret = devm_add_action_or_reset(ph->dev, scmi_perf_xa_destroy, pinfo); From patchwork Wed Nov 29 06:57:47 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sibi Sankar X-Patchwork-Id: 13472320 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 76150C4167B for ; Wed, 29 Nov 2023 06:58:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:CC:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; 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Wed, 29 Nov 2023 06:58:16 GMT Received: from blr-ubuntu-253.qualcomm.com (10.80.80.8) by nalasex01a.na.qualcomm.com (10.47.209.196) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.40; Tue, 28 Nov 2023 22:58:13 -0800 From: Sibi Sankar To: , CC: , , , , , , Sibi Sankar Subject: [PATCH 2/3] firmware: arm_scmi: Fix freq/power truncation in the perf protocol Date: Wed, 29 Nov 2023 12:27:47 +0530 Message-ID: <20231129065748.19871-3-quic_sibis@quicinc.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20231129065748.19871-1-quic_sibis@quicinc.com> References: <20231129065748.19871-1-quic_sibis@quicinc.com> MIME-Version: 1.0 X-Originating-IP: [10.80.80.8] X-ClientProxiedBy: nasanex01b.na.qualcomm.com (10.46.141.250) To nalasex01a.na.qualcomm.com (10.47.209.196) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-GUID: Ai59dcvVBLIw8QsbmAkP_tBPyjQWr3r4 X-Proofpoint-ORIG-GUID: Ai59dcvVBLIw8QsbmAkP_tBPyjQWr3r4 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.997,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2023-11-29_03,2023-11-27_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 adultscore=0 lowpriorityscore=0 suspectscore=0 spamscore=0 mlxscore=0 mlxlogscore=999 impostorscore=0 priorityscore=1501 clxscore=1015 malwarescore=0 phishscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2311060000 definitions=main-2311290049 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20231128_225820_854582_B83291E4 X-CRM114-Status: GOOD ( 17.55 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Fix frequency and power truncation seen in the performance protocol by casting it with the correct type. Fixes: a9e3fbfaa0ff ("firmware: arm_scmi: add initial support for performance protocol") Signed-off-by: Sibi Sankar --- drivers/firmware/arm_scmi/perf.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/drivers/firmware/arm_scmi/perf.c b/drivers/firmware/arm_scmi/perf.c index a648521e04a3..3344ce3a2026 100644 --- a/drivers/firmware/arm_scmi/perf.c +++ b/drivers/firmware/arm_scmi/perf.c @@ -804,9 +804,9 @@ static int scmi_dvfs_device_opps_add(const struct scmi_protocol_handle *ph, for (idx = 0; idx < dom->opp_count; idx++) { if (!dom->level_indexing_mode) - freq = dom->opp[idx].perf * dom->mult_factor; + freq = (unsigned long)dom->opp[idx].perf * dom->mult_factor; else - freq = dom->opp[idx].indicative_freq * 1000; + freq = (unsigned long)dom->opp[idx].indicative_freq * 1000; data.level = dom->opp[idx].perf; data.freq = freq; @@ -879,7 +879,7 @@ static int scmi_dvfs_freq_get(const struct scmi_protocol_handle *ph, u32 domain, return ret; if (!dom->level_indexing_mode) { - *freq = level * dom->mult_factor; + *freq = (unsigned long)level * dom->mult_factor; } else { struct scmi_opp *opp; @@ -887,7 +887,7 @@ static int scmi_dvfs_freq_get(const struct scmi_protocol_handle *ph, u32 domain, if (!opp) return -EIO; - *freq = opp->indicative_freq * 1000; + *freq = (unsigned long)opp->indicative_freq * 1000; } return ret; @@ -908,9 +908,9 @@ static int scmi_dvfs_est_power_get(const struct scmi_protocol_handle *ph, for (opp = dom->opp, idx = 0; idx < dom->opp_count; idx++, opp++) { if (!dom->level_indexing_mode) - opp_freq = opp->perf * dom->mult_factor; + opp_freq = (unsigned long)opp->perf * dom->mult_factor; else - opp_freq = opp->indicative_freq * 1000; + opp_freq = (unsigned long)opp->indicative_freq * 1000; if (opp_freq < *freq) continue; From patchwork Wed Nov 29 06:57:48 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sibi Sankar X-Patchwork-Id: 13472321 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 5B63AC4167B for ; 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Wed, 29 Nov 2023 06:58:21 +0000 Received: from nalasex01a.na.qualcomm.com (nalasex01a.na.qualcomm.com [10.47.209.196]) by NALASPPMTA02.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 3AT6wKsR020954 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 29 Nov 2023 06:58:20 GMT Received: from blr-ubuntu-253.qualcomm.com (10.80.80.8) by nalasex01a.na.qualcomm.com (10.47.209.196) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.40; Tue, 28 Nov 2023 22:58:16 -0800 From: Sibi Sankar To: , CC: , , , , , , Sibi Sankar Subject: [PATCH 3/3] firmware: arm_scmi: Increase the maximum opp count Date: Wed, 29 Nov 2023 12:27:48 +0530 Message-ID: <20231129065748.19871-4-quic_sibis@quicinc.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20231129065748.19871-1-quic_sibis@quicinc.com> References: <20231129065748.19871-1-quic_sibis@quicinc.com> MIME-Version: 1.0 X-Originating-IP: [10.80.80.8] X-ClientProxiedBy: nasanex01b.na.qualcomm.com (10.46.141.250) To nalasex01a.na.qualcomm.com (10.47.209.196) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-GUID: AR6n_PD1s-LLN0Fb8fWTsRCyat1A1kzT X-Proofpoint-ORIG-GUID: AR6n_PD1s-LLN0Fb8fWTsRCyat1A1kzT X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.997,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2023-11-29_03,2023-11-27_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 impostorscore=0 mlxscore=0 phishscore=0 mlxlogscore=793 priorityscore=1501 adultscore=0 clxscore=1015 bulkscore=0 malwarescore=0 suspectscore=0 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2311060000 definitions=main-2311290049 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20231128_225824_093934_DD25FA54 X-CRM114-Status: GOOD ( 16.87 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org The number of opps on certain variants of the X1E80100 SoC are greater than current maximum, so increase the MAX_OPP count to the next log level to accommodate that. Signed-off-by: Sibi Sankar Reviewed-by: Cristian Marussi --- drivers/firmware/arm_scmi/perf.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/firmware/arm_scmi/perf.c b/drivers/firmware/arm_scmi/perf.c index 3344ce3a2026..edf34a3c4d6a 100644 --- a/drivers/firmware/arm_scmi/perf.c +++ b/drivers/firmware/arm_scmi/perf.c @@ -24,7 +24,7 @@ #include "protocols.h" #include "notify.h" -#define MAX_OPPS 16 +#define MAX_OPPS 24 enum scmi_performance_protocol_cmd { PERF_DOMAIN_ATTRIBUTES = 0x3,