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Thu, 29 Jun 2023 02:49:51 +0000 Received: from nalasex01a.na.qualcomm.com (nalasex01a.na.qualcomm.com [10.47.209.196]) by NALASPPMTA03.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 35T2npEB016922 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 29 Jun 2023 02:49:51 GMT Received: from hu-pkondeti-hyd.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 15.2.1118.7; Wed, 28 Jun 2023 19:49:44 -0700 Date: Thu, 29 Jun 2023 08:19:40 +0530 From: Pavan Kondeti To: Mukesh Ojha CC: , , , , , , , , , , , , , , , , , , , , , , Subject: Re: [PATCH v4 07/21] soc: qcom: minidump: Add update region support Message-ID: References: <1687955688-20809-1-git-send-email-quic_mojha@quicinc.com> <1687955688-20809-8-git-send-email-quic_mojha@quicinc.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <1687955688-20809-8-git-send-email-quic_mojha@quicinc.com> X-Originating-IP: [10.80.80.8] X-ClientProxiedBy: nasanex01a.na.qualcomm.com (10.52.223.231) 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-ORIG-GUID: dl9a09ObcanbRwkFLT70EtpbFSz1yUaB X-Proofpoint-GUID: dl9a09ObcanbRwkFLT70EtpbFSz1yUaB X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.957,Hydra:6.0.591,FMLib:17.11.176.26 definitions=2023-06-28_14,2023-06-27_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 impostorscore=0 mlxscore=0 mlxlogscore=999 spamscore=0 malwarescore=0 bulkscore=0 clxscore=1015 adultscore=0 suspectscore=0 lowpriorityscore=0 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2305260000 definitions=main-2306290024 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230628_195029_654059_292B39CC X-CRM114-Status: GOOD ( 30.94 ) 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: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Wed, Jun 28, 2023 at 06:04:34PM +0530, Mukesh Ojha wrote: > Add support to update client's region physical/virtual addresses, > which is useful for dynamic loadable modules, dynamic address > changing clients like if we want to collect current stack > information for each core and the current stack is changing on > each sched_switch event, So here virtual/physical address of > the current stack is changing. So, to cover such use cases > add the update region support in minidump driver and the > corresponding smem backend support. > > Signed-off-by: Mukesh Ojha > --- > drivers/soc/qcom/qcom_minidump.c | 55 +++++++++++++++++++++++++++++++ > drivers/soc/qcom/qcom_minidump_internal.h | 3 ++ > drivers/soc/qcom/qcom_minidump_smem.c | 21 ++++++++++++ > include/soc/qcom/qcom_minidump.h | 5 +++ > 4 files changed, 84 insertions(+) > > diff --git a/drivers/soc/qcom/qcom_minidump.c b/drivers/soc/qcom/qcom_minidump.c > index cfdb63cc29d6..37d6ceb4d85c 100644 > --- a/drivers/soc/qcom/qcom_minidump.c > +++ b/drivers/soc/qcom/qcom_minidump.c > @@ -318,6 +318,61 @@ int qcom_minidump_region_unregister(const struct qcom_minidump_region *region) > } > EXPORT_SYMBOL_GPL(qcom_minidump_region_unregister); > > +/** > + * qcom_minidump_update_region() - Update region information with new physical > + * address and virtual address for already registered region e.g, current task > + * stack for a core keeps on changing on each context switch, there it needs to > + * change registered region with new updated addresses. > + * > + * @region: Should be already registered minidump region. > + * > + * Return: On success, it returns 0 and negative error value on failure. > + */ > +int qcom_minidump_update_region(const struct qcom_minidump_region *region) > +{ > + struct minidump_pregion *md_pregion; > + struct qcom_minidump_region *tmp; > + struct elfhdr *ehdr; > + struct elf_shdr *shdr; > + struct elf_phdr *phdr; > + int idx; > + int ret = 0; > + > + if (!qcom_minidump_valid_region(region)) > + return -EINVAL; > + > + mutex_lock(&md_lock); > + if (!md) { > + md_pregion = check_if_pending_region_exist(region); > + if (!md_pregion) { > + ret = -ENOENT; > + goto unlock; > + } > + tmp = &md_pregion->region; > + tmp->phys_addr = region->phys_addr; > + tmp->virt_addr = region->virt_addr; > + goto unlock; > + } > + > + ret = md->ops->md_update_region(md, &idx, region); > + if (ret) > + goto unlock; > + > + /* Skip predefined shdr/phdr header entry at the start */ > + ehdr = md->elf.ehdr; > + shdr = elf_shdr_entry_addr(ehdr, idx + 4); > + phdr = elf_phdr_entry_addr(ehdr, idx + 1); > + > + shdr->sh_addr = (elf_addr_t)region->virt_addr; > + phdr->p_vaddr = (elf_addr_t)region->virt_addr; > + phdr->p_paddr = region->phys_addr; > + > +unlock: > + mutex_unlock(&md_lock); > + return ret; > +} > +EXPORT_SYMBOL_GPL(qcom_minidump_update_region); > + I don't see any use of this API in the series. Do you plan to add one in the next version? Thanks, Pavan _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel