From mboxrd@z Thu Jan 1 00:00:00 1970 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 D19EAC38A2D for ; Wed, 26 Oct 2022 09:08:31 +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-Type: Content-Transfer-Encoding:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:In-Reply-To:References:Cc:To:From:Subject: MIME-Version:Date:Message-ID:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=Ocauf7irj9nVDsuGkdGHHKPi8ub4jm1q2qIYkOG8CBs=; b=35U0thJfjq1GUv VSTtxIvejL1wJQRrHlJWUrFQKCkR6b2yIjvH2pe2PqMl7qXDXhP4ckxsAYOOtMrEqCjoBUpHU/j8N f445yAZ+hHKw3511RVn+42WoN5HXmxME821vPnIAvX58iRNw9/Z8L02D5+ZJXmCLk8b5CVtLYiDuk qJnf+fCxhOt4uRb87lU82rfnaJz6x04np5hG8R3FO6vQdabCVvBtj4JpTzA4sNRD+ss61i9yCsr+U WiSxmwVdsuoYCXOsOORqb6vS8OBHvY5L0Z+Uc9M1Va1aGEXO7ZUGECe3JicW+3NT9Z2E+vmUo8/KL 66ayWKm6LIFe9fw4ESDg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1oncOg-008fao-9y; Wed, 26 Oct 2022 09:08:26 +0000 Received: from out30-45.freemail.mail.aliyun.com ([115.124.30.45]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1oncOd-008fYS-2Z; Wed, 26 Oct 2022 09:08:25 +0000 X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R201e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=ay29a033018046050;MF=xianting.tian@linux.alibaba.com;NM=1;PH=DS;RN=24;SR=0;TI=SMTPD_---0VT6dyvZ_1666775291; Received: from 30.221.97.58(mailfrom:xianting.tian@linux.alibaba.com fp:SMTPD_---0VT6dyvZ_1666775291) by smtp.aliyun-inc.com; Wed, 26 Oct 2022 17:08:13 +0800 Message-ID: <5df30e57-88ae-0a3b-2c1a-b962363d8670@linux.alibaba.com> Date: Wed, 26 Oct 2022 17:08:11 +0800 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:91.0) Gecko/20100101 Thunderbird/91.12.0 Subject: Re: [PATCH V4 1/2] RISC-V: Add arch_crash_save_vmcoreinfo support From: Xianting Tian To: Baoquan He , Palmer Dabbelt , Conor Dooley Cc: paul.walmsley@sifive.com, aou@eecs.berkeley.edu, anup@brainfault.org, heiko@sntech.de, guoren@kernel.org, mick@ics.forth.gr, alexandre.ghiti@canonical.com, vgoyal@redhat.com, dyoung@redhat.com, corbet@lwn.net, bagasdotme@gmail.com, k-hagio-ab@nec.com, lijiang@redhat.com, kexec@lists.infradead.org, linux-doc@vger.kernel.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, crash-utility@redhat.com, heinrich.schuchardt@canonical.com, hschauhan@nulltrace.org, yixun.lan@gmail.com References: <20221019103623.7008-1-xianting.tian@linux.alibaba.com> <20221019103623.7008-2-xianting.tian@linux.alibaba.com> <30621b3b-47ba-d612-cfb0-583d779691a3@linux.alibaba.com> <6af05838-fa58-8197-f3ce-ca95457077a7@linux.alibaba.com> In-Reply-To: <6af05838-fa58-8197-f3ce-ca95457077a7@linux.alibaba.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20221026_020823_305731_680E8080 X-CRM114-Status: GOOD ( 14.29 ) X-BeenThere: kexec@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: base64 Content-Type: text/plain; charset="utf-8"; Format="flowed" Sender: "kexec" Errors-To: kexec-bounces+kexec=archiver.kernel.org@lists.infradead.org SGkgUGFsbWVyLCBDb25vcgoKSXMgdGhpcyB2ZXJzaW9uIE9LIGZvciB5b3U/IERvIHlvdSBwbGFu IHRvIGFwcGx5IHRoaXMgcGF0Y2ggc2V0PyB0aGFua3MKCuWcqCAyMDIyLzEwLzIwIOS4i+WNiDEy OjQwLCBYaWFudGluZyBUaWFuIOWGmemBkzoKPgo+IOWcqCAyMDIyLzEwLzIwIOS4iuWNiDExOjA1 LCBCYW9xdWFuIEhlIOWGmemBkzoKPj4gT24gMTAvMjAvMjIgYXQgMTA6MTdhbSwgWGlhbnRpbmcg VGlhbiB3cm90ZToKPj4+IOWcqCAyMDIyLzEwLzIwIOS4iuWNiDEwOjA4LCBCYW9xdWFuIEhlIOWG memBkzoKPj4+PiBPbiAxMC8xOS8yMiBhdCAwNjozNnBtLCBYaWFudGluZyBUaWFuIHdyb3RlOgo+ Pj4+PiBBZGQgYXJjaF9jcmFzaF9zYXZlX3ZtY29yZWluZm8oKSwgd2hpY2ggZXhwb3J0cyBWTSBs YXlvdXQoTU9EVUxFUywgCj4+Pj4+IFZNQUxMT0MsCj4+Pj4+IFZNRU1NQVAgcmFuZ2VzIGFuZCBL RVJORUxfTElOS19BRERSKSwgdmEgYml0cyBhbmQgcmFtIGJhc2UgZm9yIAo+Pj4+PiB2bWNvcmUu Cj4+Pj4+Cj4+Pj4+IERlZmF1bHQgcGFnZXRhYmxlIGxldmVscyBhbmQgUEFHRV9PRkZTRVQgYXJl bid0IHNhbWUgZm9yIGRpZmZlcmVudCAKPj4+Pj4ga2VybmVsCj4+Pj4+IHZlcnNpb24gYXMgYmVs b3cuIEZvciBwYWdldGFibGUgbGV2ZWxzLCBpdCBzZXRzIHN2NTcgYnkgZGVmYXVsdCAKPj4+Pj4g YW5kIGZhbGxzCj4+Pj4+IGJhY2sgdG8gc2V0dGluZyBzdjQ4IGF0IGJvb3QgdGltZSBpZiBzdjU3 IGlzIG5vdCBzdXBwb3J0ZWQgYnkgdGhlIAo+Pj4+PiBoYXJkd2FyZS4KPj4+Pj4KPj4+Pj4gRm9y IHJhbSBiYXNlLCB0aGUgZGVmYXVsdCB2YWx1ZSBpcyAweDgwMjAwMDAwIGZvciBxZW11IHJpc2N2 NjQgZW52IAo+Pj4+PiBhbmQsCj4+Pj4+IGZvciBleGFtcGxlLCBpcyAweDIwMDAwMCBvbiB0aGUg WHVhblRpZSA5MTAgQ1BVLgo+Pj4+Pgo+Pj4+PiDCoMKgICogTGludXggS2VybmVsIDUuMTggfgo+ Pj4+PiDCoMKgICrCoMKgwqDCoMKgIFBHVEFCTEVfTEVWRUxTID0gNQo+Pj4+PiDCoMKgICrCoMKg wqDCoMKgIFBBR0VfT0ZGU0VUID0gMHhmZjYwMDAwMDAwMDAwMDAwCj4+Pj4+IMKgwqAgKiBMaW51 eCBLZXJuZWwgNS4xNyB+Cj4+Pj4+IMKgwqAgKsKgwqDCoMKgwqAgUEdUQUJMRV9MRVZFTFMgPSA0 Cj4+Pj4+IMKgwqAgKsKgwqDCoMKgwqAgUEFHRV9PRkZTRVQgPSAweGZmZmZhZjgwMDAwMDAwMDAK Pj4+Pj4gwqDCoCAqIExpbnV4IEtlcm5lbCA0LjE5IH4KPj4+Pj4gwqDCoCAqwqDCoMKgwqDCoCBQ R1RBQkxFX0xFVkVMUyA9IDMKPj4+Pj4gwqDCoCAqwqDCoMKgwqDCoCBQQUdFX09GRlNFVCA9IDB4 ZmZmZmZmZTAwMDAwMDAwMAo+Pj4+Pgo+Pj4+PiBTaW5jZSB0aGVzZSBjb25maWd1cmF0aW9ucyBj aGFuZ2UgZnJvbSB0aW1lIHRvIHRpbWUgYW5kIHZlcnNpb24gdG8gCj4+Pj4+IHZlcnNpb24sCj4+ Pj4+IGl0IGlzIHByZWZlcmFibGUgdG8gZXhwb3J0IHRoZW0gdmlhIHZtY29yZWluZm8gdGhhbiB0 byBjaGFuZ2UgdGhlIAo+Pj4+PiBjcmFzaCdzCj4+Pj4+IGNvZGUgZnJlcXVlbnRseSwgaXQgY2Fu IHNpbXBsaWZ5IHRoZSBkZXZlbG9wbWVudCBvZiBjcmFzaCB0b29sLgo+Pj4+Pgo+Pj4+PiBTaWdu ZWQtb2ZmLWJ5OiBYaWFudGluZyBUaWFuIDx4aWFudGluZy50aWFuQGxpbnV4LmFsaWJhYmEuY29t Pgo+Pj4+PiAtLS0KPj4+Pj4gwqDCoCBhcmNoL3Jpc2N2L2tlcm5lbC9NYWtlZmlsZcKgwqDCoMKg IHzCoCAxICsKPj4+Pj4gwqDCoCBhcmNoL3Jpc2N2L2tlcm5lbC9jcmFzaF9jb3JlLmMgfCAyMyAr KysrKysrKysrKysrKysrKysrKysrKwo+Pj4+PiDCoMKgIDIgZmlsZXMgY2hhbmdlZCwgMjQgaW5z ZXJ0aW9ucygrKQo+Pj4+PiDCoMKgIGNyZWF0ZSBtb2RlIDEwMDY0NCBhcmNoL3Jpc2N2L2tlcm5l bC9jcmFzaF9jb3JlLmMKPj4+Pj4KPj4+Pj4gZGlmZiAtLWdpdCBhL2FyY2gvcmlzY3Yva2VybmVs L01ha2VmaWxlIGIvYXJjaC9yaXNjdi9rZXJuZWwvTWFrZWZpbGUKPj4+Pj4gaW5kZXggZGI2ZTRi MTI5NGJhLi40Y2YzMDNhNzc5YWIgMTAwNjQ0Cj4+Pj4+IC0tLSBhL2FyY2gvcmlzY3Yva2VybmVs L01ha2VmaWxlCj4+Pj4+ICsrKyBiL2FyY2gvcmlzY3Yva2VybmVsL01ha2VmaWxlCj4+Pj4+IEBA IC04MSw2ICs4MSw3IEBAIG9iai0kKENPTkZJR19LR0RCKcKgwqDCoMKgwqDCoMKgICs9IGtnZGIu bwo+Pj4+PiDCoMKgIG9iai0kKENPTkZJR19LRVhFQ19DT1JFKcKgwqDCoCArPSBrZXhlY19yZWxv Y2F0ZS5vIAo+Pj4+PiBjcmFzaF9zYXZlX3JlZ3MubyBtYWNoaW5lX2tleGVjLm8KPj4+Pj4gwqDC oCBvYmotJChDT05GSUdfS0VYRUNfRklMRSnCoMKgwqAgKz0gZWxmX2tleGVjLm8gbWFjaGluZV9r ZXhlY19maWxlLm8KPj4+Pj4gwqDCoCBvYmotJChDT05GSUdfQ1JBU0hfRFVNUCnCoMKgwqAgKz0g Y3Jhc2hfZHVtcC5vCj4+Pj4+ICtvYmotJChDT05GSUdfQ1JBU0hfQ09SRSnCoMKgwqAgKz0gY3Jh c2hfY29yZS5vCj4+Pj4+IMKgwqAgb2JqLSQoQ09ORklHX0pVTVBfTEFCRUwpwqDCoMKgICs9IGp1 bXBfbGFiZWwubwo+Pj4+PiBkaWZmIC0tZ2l0IGEvYXJjaC9yaXNjdi9rZXJuZWwvY3Jhc2hfY29y ZS5jIAo+Pj4+PiBiL2FyY2gvcmlzY3Yva2VybmVsL2NyYXNoX2NvcmUuYwo+Pj4+PiBuZXcgZmls ZSBtb2RlIDEwMDY0NAo+Pj4+PiBpbmRleCAwMDAwMDAwMDAwMDAuLjNlODg5ZDBlZDdiZAo+Pj4+ PiAtLS0gL2Rldi9udWxsCj4+Pj4+ICsrKyBiL2FyY2gvcmlzY3Yva2VybmVsL2NyYXNoX2NvcmUu Ywo+Pj4+PiBAQCAtMCwwICsxLDIzIEBACj4+Pj4+ICsvLyBTUERYLUxpY2Vuc2UtSWRlbnRpZmll cjogR1BMLTIuMC1vbmx5Cj4+Pj4+ICsKPj4+Pj4gKyNpbmNsdWRlIDxsaW51eC9jcmFzaF9jb3Jl Lmg+Cj4+Pj4+ICsjaW5jbHVkZSA8bGludXgvcGFnZW1hcC5oPgo+Pj4+PiArCj4+Pj4+ICt2b2lk IGFyY2hfY3Jhc2hfc2F2ZV92bWNvcmVpbmZvKHZvaWQpCj4+Pj4+ICt7Cj4+Pj4+ICvCoMKgwqAg Vk1DT1JFSU5GT19OVU1CRVIoVkFfQklUUyk7Cj4+Pj4+ICvCoMKgwqAgVk1DT1JFSU5GT19OVU1C RVIocGh5c19yYW1fYmFzZSk7Cj4+Pj4+ICsKPj4+Pj4gK8KgwqDCoCB2bWNvcmVpbmZvX2FwcGVu ZF9zdHIoIk5VTUJFUihQQUdFX09GRlNFVCk9MHglbHhcbiIsIAo+Pj4+PiBQQUdFX09GRlNFVCk7 Cj4+Pj4+ICsgdm1jb3JlaW5mb19hcHBlbmRfc3RyKCJOVU1CRVIoVk1BTExPQ19TVEFSVCk9MHgl bHhcbiIsIAo+Pj4+PiBWTUFMTE9DX1NUQVJUKTsKPj4+Pj4gK8KgwqDCoCB2bWNvcmVpbmZvX2Fw cGVuZF9zdHIoIk5VTUJFUihWTUFMTE9DX0VORCk9MHglbHhcbiIsIAo+Pj4+PiBWTUFMTE9DX0VO RCk7Cj4+Pj4+ICsgdm1jb3JlaW5mb19hcHBlbmRfc3RyKCJOVU1CRVIoVk1FTU1BUF9TVEFSVCk9 MHglbHhcbiIsIAo+Pj4+PiBWTUVNTUFQX1NUQVJUKTsKPj4+Pj4gK8KgwqDCoCB2bWNvcmVpbmZv X2FwcGVuZF9zdHIoIk5VTUJFUihWTUVNTUFQX0VORCk9MHglbHhcbiIsIAo+Pj4+PiBWTUVNTUFQ X0VORCk7Cj4+Pj4+ICsjaWZkZWYgQ09ORklHXzY0QklUCj4+Pj4+ICsgdm1jb3JlaW5mb19hcHBl bmRfc3RyKCJOVU1CRVIoTU9EVUxFU19WQUREUik9MHglbHhcbiIsIAo+Pj4+PiBNT0RVTEVTX1ZB RERSKTsKPj4+Pj4gK8KgwqDCoCB2bWNvcmVpbmZvX2FwcGVuZF9zdHIoIk5VTUJFUihNT0RVTEVT X0VORCk9MHglbHhcbiIsIAo+Pj4+PiBNT0RVTEVTX0VORCk7Cj4+Pj4+ICsjZW5kaWYKPj4+Pj4g Kwo+Pj4+PiArwqDCoMKgIGlmIChJU19FTkFCTEVEKENPTkZJR182NEJJVCkpCj4+Pj4+ICsgdm1j b3JlaW5mb19hcHBlbmRfc3RyKCJOVU1CRVIoS0VSTkVMX0xJTktfQUREUik9MHglbHhcbiIsIAo+ Pj4+PiBLRVJORUxfTElOS19BRERSKTsKPj4+PiBXb25kZXJpbmcgd2h5IHlvdSBkb24ndCBwdXQg S0VSTkVMX0xJTktfQUREUiBleHBvcnRpbmcgaW50byB0aGUgYWJvdmUKPj4+PiBpZmRlZmZlcnkg c2NvcGUsIHdpdGggdGhhdCB5b3UgY2FuIHNhdmUgb25lIGxpbmUgb2YgCj4+Pj4gIklTX0VOQUJM RUQoQ09ORklHXzY0QklUKSIuCj4+PiBJIGZvbGxvd2VkIHRoZSBydWxlIGluIHByaW50X3ZtX2xh eW91dCgpIG9mIGFyY2gvcmlzY3YvbW0vaW5pdC5jLCAKPj4+IHdoaWNoIHVzZWQKPj4+IElTX0VO QUJMRUQgd2hlbiBwcmludCB0aGUgdmFsdWUgb2YgS0VSTkVMX0xJTktfQUREUi4KPj4+Cj4+IEkg c2VlLiBUaGVyZSdzIFBBR0VfT0ZGU0VUIGluIHRoZSBtaWRkbGUuIFRoYW5rcy4KPj4KPj4gwqDC oMKgwqDCoMKgwqDCoCBwcmludF9tbCgibG93bWVtIiwgKHVuc2lnbmVkIGxvbmcpUEFHRV9PRkZT RVQsCj4+IMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgICh1bnNpZ25lZCBsb25nKWhp Z2hfbWVtb3J5KQo+Pgo+PiBTbyBub3csIGRvIHlvdSB0aGluayBpZiBpdCdzIG5lY2Vzc2FyeSB0 byBoYXZlIGFub3RoZXIKPj4gSVNfRU5BQkxFRChDT05GSUdfNjRCSVQpIGluIHRoZSBjdXJyZW50 IGFyY2hfY3Jhc2hfc2F2ZV92bWNvcmVpbmZvKCk/Cj4KPiBGb3Igd2hpY2ggTUFDUk8/wqAgSSB0 aGluayBjdXJyZW50IGNvZGUgZm9yIFBBR0VfT0ZGU0VUIGlzIE9LLgo+CgpfX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwprZXhlYyBtYWlsaW5nIGxpc3QKa2V4 ZWNAbGlzdHMuaW5mcmFkZWFkLm9yZwpodHRwOi8vbGlzdHMuaW5mcmFkZWFkLm9yZy9tYWlsbWFu L2xpc3RpbmZvL2tleGVjCg==