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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 99E0DCDB482 for ; Tue, 17 Oct 2023 05:45:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234529AbjJQFph (ORCPT ); Tue, 17 Oct 2023 01:45:37 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39952 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234471AbjJQFpZ (ORCPT ); Tue, 17 Oct 2023 01:45:25 -0400 Received: from rtits2.realtek.com.tw (rtits2.realtek.com [211.75.126.72]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 79247EA; Mon, 16 Oct 2023 22:45:20 -0700 (PDT) X-SpamFilter-By: ArmorX SpamTrap 5.78 with qID 39H5iEadD3730461, This message is accepted by code: ctloc85258 Received: from mail.realtek.com (rtexh36505.realtek.com.tw[172.21.6.25]) by rtits2.realtek.com.tw (8.15.2/2.93/5.92) with ESMTPS id 39H5iEadD3730461 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 17 Oct 2023 13:44:15 +0800 Received: from RTEXMBS02.realtek.com.tw (172.21.6.95) by RTEXH36505.realtek.com.tw (172.21.6.25) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.32; Tue, 17 Oct 2023 13:44:13 +0800 Received: from RTEXMBS01.realtek.com.tw (172.21.6.94) by RTEXMBS02.realtek.com.tw (172.21.6.95) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.7; Tue, 17 Oct 2023 13:44:13 +0800 Received: from RTEXMBS01.realtek.com.tw ([fe80::9cb8:8d5:b6b3:213b]) by RTEXMBS01.realtek.com.tw ([fe80::9cb8:8d5:b6b3:213b%5]) with mapi id 15.01.2375.007; Tue, 17 Oct 2023 13:44:13 +0800 From: Ricky WU To: Kai-Heng Feng , Lukas Wunner CC: "bhelgaas@google.com" , "linux-pm@vger.kernel.org" , "linux-mmc@vger.kernel.org" , Kees Cook , Tony Luck , "Guilherme G. Piccoli" , "linux-pci@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "linux-hardening@vger.kernel.org" , "bpf@vger.kernel.org" Subject: RE: [PATCH] PCI: pciehp: Prevent child devices from doing RPM on PCIe Link Down Thread-Topic: [PATCH] PCI: pciehp: Prevent child devices from doing RPM on PCIe Link Down Thread-Index: AQHZ/+WX29Sx+yjN7keHtkFSV38Z/LBLoV4AgAE/YwCAAJeMcA== Date: Tue, 17 Oct 2023 05:44:13 +0000 Message-ID: <24f72eea9fba45c4b1cd85836b17f251@realtek.com> References: <20231016040132.23824-1-kai.heng.feng@canonical.com> <20231016093210.GA22952@wunner.de> In-Reply-To: Accept-Language: zh-TW, en-US Content-Language: zh-TW x-originating-ip: [172.22.81.100] x-kse-serverinfo: RTEXMBS02.realtek.com.tw, 9 x-kse-antispam-interceptor-info: fallback x-kse-antivirus-interceptor-info: fallback Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 MIME-Version: 1.0 X-KSE-AntiSpam-Interceptor-Info: fallback X-KSE-ServerInfo: RTEXH36505.realtek.com.tw, 9 X-KSE-AntiSpam-Interceptor-Info: fallback X-KSE-Antivirus-Interceptor-Info: fallback X-KSE-AntiSpam-Interceptor-Info: fallback Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org DQoNCj4gLS0tLS1PcmlnaW5hbCBNZXNzYWdlLS0tLS0NCj4gRnJvbTogS2FpLUhlbmcgRmVuZyA8 a2FpLmhlbmcuZmVuZ0BjYW5vbmljYWwuY29tPg0KPiANCj4gT24gTW9uLCBPY3QgMTYsIDIwMjMg YXQgNTozMuKAr1BNIEx1a2FzIFd1bm5lciA8bHVrYXNAd3VubmVyLmRlPiB3cm90ZToNCj4gPg0K PiA+IE9uIE1vbiwgT2N0IDE2LCAyMDIzIGF0IDEyOjAxOjMxUE0gKzA4MDAsIEthaS1IZW5nIEZl bmcgd3JvdGU6DQo+ID4gPiBXaGVuIGluc2VydGluZyBhbiBTRDcuMCBjYXJkIHRvIFJlYWx0ZWsg Y2FyZCByZWFkZXIsIGl0IGNhbiB0cmlnZ2VyDQo+ID4gPiBQQ0kgc2xvdCBMaW5rIGRvd24gYW5k IGNhdXNlcyB0aGUgZm9sbG93aW5nIGVycm9yOg0KPiA+DQo+ID4gV2h5IGRvZXMgKmluc2VydGlu ZyogYSBjYXJkIGNhdXNlIGEgTGluayBEb3duPw0KPiANCj4gUmlja3ksIGRvIHlvdSBrbm93IHRo ZSByZWFzb24gd2h5IExpbmsgRG93biBoYXBwZW5zPw0KPiANCg0KQmVjYXVzZSBTRDcuMCBjYXJk IGlzIHVzZSBwY2llLW52bWUgZHJpdmVyLCByZWFkZXIgbmVlZCB0byByZS1saW5rIHRoZW4ganVz dCBkbyB0aGUgcGNpZSBjaGFubmVsIA0KDQo+ID4NCj4gPg0KPiA+ID4gWyAgIDYzLjg5ODg2MV0g cGNpZXBvcnQgMDAwMDowMDoxYy4wOiBwY2llaHA6IFNsb3QoOCk6IExpbmsgRG93bg0KPiA+ID4g WyAgIDYzLjkxMjExOF0gQlVHOiB1bmFibGUgdG8gaGFuZGxlIHBhZ2UgZmF1bHQgZm9yIGFkZHJl c3M6DQo+IGZmZmZiMjRkNDAzZTUwMTANCj4gPiBbLi4uXQ0KPiA+ID4gWyAgIDYzLjkxMjE5OF0g ID8gYXNtX2V4Y19wYWdlX2ZhdWx0KzB4MjcvMHgzMA0KPiA+ID4gWyAgIDYzLjkxMjIwM10gID8g aW9yZWFkMzIrMHgyZS8weDcwDQo+ID4gPiBbICAgNjMuOTEyMjA2XSAgPyBydHN4X3BjaV93cml0 ZV9yZWdpc3RlcisweDViLzB4OTAgW3J0c3hfcGNpXQ0KPiA+ID4gWyAgIDYzLjkxMjIxN10gIHJ0 c3hfc2V0X2wxb2ZmX3N1YisweDFjLzB4MzAgW3J0c3hfcGNpXQ0KPiA+ID4gWyAgIDYzLjkxMjIy Nl0gIHJ0czUyNjFfc2V0X2wxb2ZmX2NmZ19zdWJfZDArMHgzNi8weDQwIFtydHN4X3BjaV0NCj4g PiA+IFsgICA2My45MTIyMzRdICBydHN4X3BjaV9ydW50aW1lX2lkbGUrMHhjNy8weDE2MCBbcnRz eF9wY2ldDQo+ID4gPiBbICAgNjMuOTEyMjQzXSAgPyBfX3BmeF9wY2lfcG1fcnVudGltZV9pZGxl KzB4MTAvMHgxMA0KPiA+ID4gWyAgIDYzLjkxMjI0Nl0gIHBjaV9wbV9ydW50aW1lX2lkbGUrMHgz NC8weDcwDQo+ID4gPiBbICAgNjMuOTEyMjQ4XSAgcnBtX2lkbGUrMHhjNC8weDJiMA0KPiA+ID4g WyAgIDYzLjkxMjI1MV0gIHBtX3J1bnRpbWVfd29yaysweDkzLzB4YzANCj4gPiA+IFsgICA2My45 MTIyNTRdICBwcm9jZXNzX29uZV93b3JrKzB4MjFhLzB4NDMwDQo+ID4gPiBbICAgNjMuOTEyMjU4 XSAgd29ya2VyX3RocmVhZCsweDRhLzB4M2MwDQo+ID4NCj4gPiBUaGlzIGxvb2tzIGxpa2UgcGNy LT5yZW1hcF9hZGRyIGlzIGFjY2Vzc2VkIGFmdGVyIGl0IGhhcyBiZWVuDQo+ID4gaW91bm1hcCdl ZCBpbiBydHN4X3BjaV9yZW1vdmUoKSBvciBiZWZvcmUgaXQgaGFzIGJlZW4gaW9tYXAnZWQgaW4N Cj4gcnRzeF9wY2lfcHJvYmUoKS4NCj4gPg0KPiA+IElzIHRoZSBjYXJkIHJlYWRlciBpdHNlbGYg bG9jYXRlZCBiZWxvdyBhIGhvdHBsdWcgcG9ydCBhbmQgdW5wbHVnZ2VkIGhlcmU/DQo+ID4gT3Ig aXMgdGhpcyBhYm91dCB0aGUgY2FyZCBiZWluZyByZW1vdmVkIGZyb20gdGhlIGNhcmQgcmVhZGVy Pw0KPiA+DQo+ID4gSGF2aW5nIGZ1bGwgZG1lc2cgb3V0cHV0IGFuZCBsc3BjaSAtdnZ2IG91dHB1 dCBhdHRhY2hlZCB0byBhIGJ1Z3ppbGxhDQo+ID4gd291bGQgaGVscCB0byB1bmRlcnN0YW5kIHdo YXQgaXMgZ29pbmcgb24uDQo+IA0KPiBJIGRvbid0IGhhdmUgdGhlIGhhcmR3YXJlIHNvIHdlIG5l ZWQgUmlja3kgdG8gcHJvdmlkZSBtb3JlIGluZm9ybWF0aW9uIGhlcmUuDQo+IA0KPiBSZWdhcmRs ZXNzIG9mIHRoZSBjYXJkcmVhZGVyIGlzc3VlLCBkbyB5b3UgaGF2ZSBhbnkgY29uY2VybiBvbiB0 aGUgcGF0Y2gNCj4gaXRzZWxmPw0KPiANCj4gS2FpLUhlbmcNCj4gDQo+ID4NCj4gPiBUaGFua3Ms DQo+ID4NCj4gPiBMdWthcw0K