linux-kernel - Re: [PATCH v16 07/14] firmware: psci: Implement vendor-specific resets as reboot-mode

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <1bf62073-fae9-dd49-c908-193c06cdda84@oss.qualcomm.com>
Date: Wed, 15 Oct 2025 13:17:01 +0530
From: Shivendra Pratap <shivendra.pratap@....qualcomm.com>
To: Pavan Kondeti <pavan.kondeti@....qualcomm.com>
Cc: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Sebastian Reichel <sre@...nel.org>, Rob Herring <robh@...nel.org>,
        Sudeep Holla <sudeep.holla@....com>,
        Souvik Chakravarty <Souvik.Chakravarty@....com>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley
 <conor+dt@...nel.org>,
        Andy Yan <andy.yan@...k-chips.com>,
        Mark Rutland <mark.rutland@....com>,
        Lorenzo Pieralisi <lpieralisi@...nel.org>,
        Arnd Bergmann <arnd@...db.de>, Konrad Dybcio <konradybcio@...nel.org>,
        cros-qcom-dts-watchers@...omium.org, Vinod Koul <vkoul@...nel.org>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        Florian Fainelli <florian.fainelli@...adcom.com>,
        Moritz Fischer <moritz.fischer@...us.com>,
        John Stultz <john.stultz@...aro.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>,
        Mukesh Ojha <mukesh.ojha@....qualcomm.com>,
        Stephen Boyd <swboyd@...omium.org>,
        Andre Draszik
 <andre.draszik@...aro.org>,
        Kathiravan Thirumoorthy <kathiravan.thirumoorthy@....qualcomm.com>,
        linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-arm-msm@...r.kernel.org,
        Elliot Berman <quic_eberman@...cinc.com>,
        Srinivas Kandagatla <srini@...nel.org>,
        Umang Chheda <umang.chheda@....qualcomm.com>
Subject: Re: [PATCH v16 07/14] firmware: psci: Implement vendor-specific
 resets as reboot-mode



On 10/15/2025 12:25 PM, Pavan Kondeti wrote:
> On Wed, Oct 15, 2025 at 10:08:22AM +0530, Shivendra Pratap wrote:
>> +static int __init psci_init_vendor_reset(void)
>> +{
>> +	struct reboot_mode_driver *reboot;
>> +	struct device_node *psci_np;
>> +	struct device_node *np;
>> +	int ret;
>> +
>> +	if (!psci_system_reset2_supported)
>> +		return -EINVAL;
>> +
>> +	psci_np = of_find_compatible_node(NULL, NULL, "arm,psci-1.0");
>> +	if (!psci_np)
>> +		return -ENODEV;
>> +
>> +	np = of_find_node_by_name(psci_np, "reboot-mode");
>> +	if (!np) {
>> +		of_node_put(psci_np);
>> +		return -ENODEV;
>> +	}
>> +
>> +	ret = atomic_notifier_chain_register(&panic_notifier_list, &psci_panic_block);
>> +	if (ret)
>> +		goto err_notifier;
>> +
>> +	reboot = kzalloc(sizeof(*reboot), GFP_KERNEL);
>> +	if (!reboot) {
>> +		ret = -ENOMEM;
>> +		goto err_kzalloc;
>> +	}
>> +
>> +	reboot->write = psci_set_vendor_sys_reset2;
>> +	reboot->driver_name = "psci";
>> +
>> +	ret = reboot_mode_register(reboot, of_fwnode_handle(np));
>> +	if (ret)
>> +		goto err_register;
>> +
> 
> minor nit: np and psci_np reference must be dropped since we are done
> using it.

Ack. Sure. thanks. Will update this.

thanks,
Shivendra