From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="lBfp7AjI" Received: from mail-wr1-x435.google.com (mail-wr1-x435.google.com [IPv6:2a00:1450:4864:20::435]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8C316110 for ; Mon, 20 Nov 2023 02:55:29 -0800 (PST) Received: by mail-wr1-x435.google.com with SMTP id ffacd0b85a97d-32dff08bbdbso3280611f8f.2 for ; Mon, 20 Nov 2023 02:55:29 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1700477728; x=1701082528; darn=vger.kernel.org; h=content-transfer-encoding:in-reply-to:autocrypt:from:references:cc :to:content-language:subject:user-agent:mime-version:date:message-id :from:to:cc:subject:date:message-id:reply-to; bh=2Ydc3aPLrm+NIPOgY7lEV6d3p5Eng+CVEruaIut0/2k=; b=lBfp7AjIpjYW8cacvFCHEpP3na5LgEPP2eSzMsggRhr98Zow2E0h+JC6Co9wsmfTOU PRHgxw2m9mgNzQfpH7/RpuxdHxdVj435AjIfvRkamn0NGpWBWZUyny/Uz1xh2Jv2rpa1 ay5pvUALlNBSAIRiQLQyn4XrfRukWAXKm98G9QNyYUD69qfSpV+dak4YYwnyhFvl80ST GBWu2RBw+DPeDUlACtQDi+XFPygLDPEfx57UtKA+iLaOV/LWsofTW7M0Y2hFO/RSnJYQ deY/edSbnSMLzOIBgiK2lVD81TAw3RDl5D9P+R+htgBi9DjmYB3TwQUXk5TcpFa5QmDH c5uA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1700477728; x=1701082528; h=content-transfer-encoding:in-reply-to:autocrypt:from:references:cc :to:content-language:subject:user-agent:mime-version:date:message-id :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=2Ydc3aPLrm+NIPOgY7lEV6d3p5Eng+CVEruaIut0/2k=; b=EWEYG3dI/MPzoIvXecyOT1VIZTa/lMDvdj0JQliSyfMQpNVRB5DMjjymD48xJHHxGz DRv89v3QZ9FGnMqqp1bmaOu3qxH16+QSCBphFyumcycj41YhQ4ume4tl9NRQXZ/kYYf+ gQHG6+VCMeeGRo2uwC+Xduns1eRtD9HQhlAsNyiofM7tsIscpZKMNieRaTTmBxHAL+x7 nixJOZNFTp7KdcDJv4jm8hVGiSk9meWvIcznvSXANAjKz9L9+adIEZ72ZNY3BayOzZ/L 9dbj95gJsX9gHsKHHjUPw4fPZPP3j3zTrG3lahKv1mlcxlMhoe8gV0g5ztkYEysFIB7W bCNQ== X-Gm-Message-State: AOJu0Yzlr0fF27Uj5KkUIfH51dg6JxKuLiGRrPetPH9zb8sdLVMEcJqg rZ/82cwALAwwNKnsh8XyzYM9B6AV9+n4qUihiIc= X-Google-Smtp-Source: AGHT+IH0Yi0BlnhP+AyCxkHR2ebZGUWO71heHD2OpxZtw/Tw1I2JqFXy12eaZFlwHzXQhyGcH1QIMw== X-Received: by 2002:adf:ec51:0:b0:31f:8999:c409 with SMTP id w17-20020adfec51000000b0031f8999c409mr4460011wrn.66.1700477727742; Mon, 20 Nov 2023 02:55:27 -0800 (PST) Received: from [192.168.1.20] ([178.197.222.11]) by smtp.gmail.com with ESMTPSA id dh18-20020a0560000a9200b00332cb1bcd01sm981198wrb.86.2023.11.20.02.55.25 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 20 Nov 2023 02:55:26 -0800 (PST) Message-ID: <417cb5cb-01f5-4d01-8bbe-aa2286fca43e@linaro.org> Date: Mon, 20 Nov 2023 11:55:24 +0100 Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 0/3] Implement vendor resets for PSCI SYSTEM_RESET2 Content-Language: en-US To: Elliot Berman , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Lorenzo Pieralisi , Mark Rutland Cc: Satya Durga Srinivasu Prabhala , Melody Olvera , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Florian Fainelli References: <20231117-arm-psci-system_reset2-vendor-reboots-v1-0-03c4612153e2@quicinc.com> From: Krzysztof Kozlowski Autocrypt: addr=krzysztof.kozlowski@linaro.org; keydata= xsFNBFVDQq4BEAC6KeLOfFsAvFMBsrCrJ2bCalhPv5+KQF2PS2+iwZI8BpRZoV+Bd5kWvN79 cFgcqTTuNHjAvxtUG8pQgGTHAObYs6xeYJtjUH0ZX6ndJ33FJYf5V3yXqqjcZ30FgHzJCFUu JMp7PSyMPzpUXfU12yfcRYVEMQrmplNZssmYhiTeVicuOOypWugZKVLGNm0IweVCaZ/DJDIH gNbpvVwjcKYrx85m9cBVEBUGaQP6AT7qlVCkrf50v8bofSIyVa2xmubbAwwFA1oxoOusjPIE J3iadrwpFvsZjF5uHAKS+7wHLoW9hVzOnLbX6ajk5Hf8Pb1m+VH/E8bPBNNYKkfTtypTDUCj NYcd27tjnXfG+SDs/EXNUAIRefCyvaRG7oRYF3Ec+2RgQDRnmmjCjoQNbFrJvJkFHlPeHaeS BosGY+XWKydnmsfY7SSnjAzLUGAFhLd/XDVpb1Een2XucPpKvt9ORF+48gy12FA5GduRLhQU vK4tU7ojoem/G23PcowM1CwPurC8sAVsQb9KmwTGh7rVz3ks3w/zfGBy3+WmLg++C2Wct6nM Pd8/6CBVjEWqD06/RjI2AnjIq5fSEH/BIfXXfC68nMp9BZoy3So4ZsbOlBmtAPvMYX6U8VwD TNeBxJu5Ex0Izf1NV9CzC3nNaFUYOY8KfN01X5SExAoVTr09ewARAQABzTRLcnp5c3p0b2Yg S296bG93c2tpIDxrcnp5c3p0b2Yua296bG93c2tpQGxpbmFyby5vcmc+wsGUBBMBCgA+FiEE m9B+DgxR+NWWd7dUG5NDfTtBYpsFAmI+BxMCGwMFCRRfreEFCwkIBwIGFQoJCAsCBBYCAwEC HgECF4AACgkQG5NDfTtBYptgbhAAjAGunRoOTduBeC7V6GGOQMYIT5n3OuDSzG1oZyM4kyvO XeodvvYv49/ng473E8ZFhXfrre+c1olbr1A8pnz9vKVQs9JGVa6wwr/6ddH7/yvcaCQnHRPK mnXyP2BViBlyDWQ71UC3N12YCoHE2cVmfrn4JeyK/gHCvcW3hUW4i5rMd5M5WZAeiJj3rvYh v8WMKDJOtZFXxwaYGbvFJNDdvdTHc2x2fGaWwmXMJn2xs1ZyFAeHQvrp49mS6PBQZzcx0XL5 cU9ZjhzOZDn6Apv45/C/lUJvPc3lo/pr5cmlOvPq1AsP6/xRXsEFX/SdvdxJ8w9KtGaxdJuf rpzLQ8Ht+H0lY2On1duYhmro8WglOypHy+TusYrDEry2qDNlc/bApQKtd9uqyDZ+rx8bGxyY qBP6bvsQx5YACI4p8R0J43tSqWwJTP/R5oPRQW2O1Ye1DEcdeyzZfifrQz58aoZrVQq+innR aDwu8qDB5UgmMQ7cjDSeAQABdghq7pqrA4P8lkA7qTG+aw8Z21OoAyZdUNm8NWJoQy8m4nUP gmeeQPRc0vjp5JkYPgTqwf08cluqO6vQuYL2YmwVBIbO7cE7LNGkPDA3RYMu+zPY9UUi/ln5 dcKuEStFZ5eqVyqVoZ9eu3RTCGIXAHe1NcfcMT9HT0DPp3+ieTxFx6RjY3kYTGLOwU0EVUNc NAEQAM2StBhJERQvgPcbCzjokShn0cRA4q2SvCOvOXD+0KapXMRFE+/PZeDyfv4dEKuCqeh0 hihSHlaxTzg3TcqUu54w2xYskG8Fq5tg3gm4kh1Gvh1LijIXX99ABA8eHxOGmLPRIBkXHqJY oHtCvPc6sYKNM9xbp6I4yF56xVLmHGJ61KaWKf5KKWYgA9kfHufbja7qR0c6H79LIsiYqf92 H1HNq1WlQpu/fh4/XAAaV1axHFt/dY/2kU05tLMj8GjeQDz1fHas7augL4argt4e+jum3Nwt yupodQBxncKAUbzwKcDrPqUFmfRbJ7ARw8491xQHZDsP82JRj4cOJX32sBg8nO2N5OsFJOcd 5IE9v6qfllkZDAh1Rb1h6DFYq9dcdPAHl4zOj9EHq99/CpyccOh7SrtWDNFFknCmLpowhct9 5ZnlavBrDbOV0W47gO33WkXMFI4il4y1+Bv89979rVYn8aBohEgET41SpyQz7fMkcaZU+ok/ +HYjC/qfDxT7tjKXqBQEscVODaFicsUkjheOD4BfWEcVUqa+XdUEciwG/SgNyxBZepj41oVq FPSVE+Ni2tNrW/e16b8mgXNngHSnbsr6pAIXZH3qFW+4TKPMGZ2rZ6zITrMip+12jgw4mGjy 5y06JZvA02rZT2k9aa7i9dUUFggaanI09jNGbRA/ABEBAAHCwXwEGAEKACYCGwwWIQSb0H4O DFH41ZZ3t1Qbk0N9O0FimwUCYDzvagUJFF+UtgAKCRAbk0N9O0Fim9JzD/0auoGtUu4mgnna oEEpQEOjgT7l9TVuO3Qa/SeH+E0m55y5Fjpp6ZToc481za3xAcxK/BtIX5Wn1mQ6+szfrJQ6 59y2io437BeuWIRjQniSxHz1kgtFECiV30yHRgOoQlzUea7FgsnuWdstgfWi6LxstswEzxLZ Sj1EqpXYZE4uLjh6dW292sO+j4LEqPYr53hyV4I2LPmptPE9Rb9yCTAbSUlzgjiyyjuXhcwM qf3lzsm02y7Ooq+ERVKiJzlvLd9tSe4jRx6Z6LMXhB21fa5DGs/tHAcUF35hSJrvMJzPT/+u /oVmYDFZkbLlqs2XpWaVCo2jv8+iHxZZ9FL7F6AHFzqEFdqGnJQqmEApiRqH6b4jRBOgJ+cY qc+rJggwMQcJL9F+oDm3wX47nr6jIsEB5ZftdybIzpMZ5V9v45lUwmdnMrSzZVgC4jRGXzsU EViBQt2CopXtHtYfPAO5nAkIvKSNp3jmGxZw4aTc5xoAZBLo0OV+Ezo71pg3AYvq0a3/oGRG KQ06ztUMRrj8eVtpImjsWCd0bDWRaaR4vqhCHvAG9iWXZu4qh3ipie2Y0oSJygcZT7H3UZxq fyYKiqEmRuqsvv6dcbblD8ZLkz1EVZL6djImH5zc5x8qpVxlA0A0i23v5QvN00m6G9NFF0Le D2GYIS41Kv4Isx2dEFh+/Q== In-Reply-To: <20231117-arm-psci-system_reset2-vendor-reboots-v1-0-03c4612153e2@quicinc.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 17/11/2023 22:18, Elliot Berman wrote: > The PSCI SYSTEM_RESET2 call allows vendor firmware to define additional > reset types which could be mapped to the reboot argument. > > Setting up reboot on Qualcomm devices can be inconsistent from chipset > to chipset. Generally, there is a PMIC register that gets written to > decide the reboot type. There is also sometimes a cookie that can be > written to indicate that the bootloader should behave differently than a > regular boot. These knobs evolve over product generations and require > more drivers. Qualcomm firmwares are beginning to expose vendor > SYSTEM_RESET2 types to simplify driver requirements from Linux. > > Add support in PSCI to statically wire reboot mode commands from > userspace to a vendor reset and cookie value using the device tree. The > DT bindings are similar to reboot mode framework except that 2 > integers are accepted (the type and cookie). Also, reboot mode framework > is intended to program, but not reboot, the host. PSCI SYSTEM_RESET2 > does both. I've not added support for reading ACPI tables since I don't > have any device which provides them + firmware that supports vendor > SYSTEM_RESET2 types. > > Previous discussions around SYSTEM_RESET2: > - https://lore.kernel.org/lkml/20230724223057.1208122-2-quic_eberman@quicinc.com/T/ > - https://lore.kernel.org/all/4a679542-b48d-7e11-f33a-63535a5c68cb@quicinc.com/ Please link here upstream DTS user for this. Best regards, Krzysztof