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 lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (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 E50F0C54754 for ; Fri, 16 May 2025 16:56:21 +0000 (UTC) Received: from boromir.ozlabs.org (localhost [127.0.0.1]) by lists.ozlabs.org (Postfix) with ESMTP id 4ZzYBK5q0Jz2xHX; Sat, 17 May 2025 02:56:09 +1000 (AEST) Authentication-Results: lists.ozlabs.org; arc=none smtp.remote-ip=117.135.210.2 ARC-Seal: i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1747414569; cv=none; b=VAxx2dzf7alRNx+MI/0p1foIsQqThSZn9mqbM5VMEN6rybhGv3geL7a0DghDVtqxk4H/L6SBfienqsokqUhFwAGQGHRwJWlHnd/tkfgdyWFJKH+CveJeTSw42w68LKVokevHKuryuLZcg6SbH7UeP0VncDN+k0DHo+qGHIZbDthe55wr7GD9NbshMQ8xeEEG07svXmhJEybdN0HmITBty0LyHlHeVP5TKhVKKzUrkR3f0vbY/9K7ZiDcADVRMvm7l9HVEcXKvmUcsd7JDg9cZB5FblTkOPC4/nEUPu07Y7SAAR/CU7Ja0xt1Hp3sKwaWu2WWqTj/L7T+AmVePgSoAw== ARC-Message-Signature: i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1747414569; c=relaxed/relaxed; bh=grA5e9IizUHs6xNUrHdJHCEjg25RlCLjAgPs5bVE1s8=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=W92ihVQq8Rjrv88v5Ywr+oZrxGCe8FntShlVqdiQzx/c5eHp28LRNmYTXMx2DrjgrsTJb0eLWPPDSsQMglRxR+O3/NtRv7HRHiS1LGf0WMFqzl/MSwVOmB2tTBTwp/zmReAPURkxLTC+JiVLonkKaBy/NMPB6q8Ce+3GgSol2NC/i/SiR1xaXWfLK4+XCYhLCGPA0FVRS3JmXNMVMVbydEYEb1xL4ac0rWEcT9X4v339swxmHghmMS9RwFRp4yTcLhNY1oQt7TbqN21Li9FPmne0dE9I7Hs86qKNZjATUOBxCAr3ozkRgg74sMDouh9HmvfEkyrD3oIPnUirV3eWbQ== ARC-Authentication-Results: i=1; lists.ozlabs.org; dmarc=pass (p=none dis=none) header.from=163.com; dkim=pass (1024-bit key; unprotected) header.d=163.com header.i=@163.com header.a=rsa-sha256 header.s=s110527 header.b=W4GHeuHb; dkim-atps=neutral; spf=pass (client-ip=117.135.210.2; helo=m16.mail.163.com; envelope-from=18255117159@163.com; receiver=lists.ozlabs.org) smtp.mailfrom=163.com Authentication-Results: lists.ozlabs.org; dmarc=pass (p=none dis=none) header.from=163.com Authentication-Results: lists.ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=163.com header.i=@163.com header.a=rsa-sha256 header.s=s110527 header.b=W4GHeuHb; dkim-atps=neutral Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=163.com (client-ip=117.135.210.2; helo=m16.mail.163.com; envelope-from=18255117159@163.com; receiver=lists.ozlabs.org) Received: from m16.mail.163.com (m16.mail.163.com [117.135.210.2]) by lists.ozlabs.org (Postfix) with ESMTP id 4ZzYBJ2gfZz306d for ; Sat, 17 May 2025 02:56:07 +1000 (AEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=163.com; s=s110527; h=From:To:Subject:Date:Message-Id:MIME-Version; bh=gr A5e9IizUHs6xNUrHdJHCEjg25RlCLjAgPs5bVE1s8=; b=W4GHeuHb8bTBki/Nz8 Za443f8O0mNQTaO3Firhsddwn9orQGcVp5KhIHrcXZWCw758smz80EjA3ZTx6Kws lFyU3z+r4x+jRgjH+kC7ZPzNx+Ncg+ynjO+WQFDtdckb73ad/1JJDHrneudoFgtq 2itaqh69516l8ALGVDw9oWDKk= Received: from localhost.localdomain (unknown []) by gzga-smtp-mtada-g0-3 (Coremail) with SMTP id _____wB3lOX6bSdoVElgBw--.64634S4; Sat, 17 May 2025 00:55:24 +0800 (CST) From: Hans Zhang <18255117159@163.com> To: bhelgaas@google.com, tglx@linutronix.de, kw@linux.com, manivannan.sadhasivam@linaro.org, mahesh@linux.ibm.com Cc: oohall@gmail.com, linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, Hans Zhang Subject: [PATCH 2/4] PCI/AER: Introduce aer_panic kernel command-line option Date: Sat, 17 May 2025 00:55:16 +0800 Message-Id: <20250516165518.125495-3-18255117159@163.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20250516165518.125495-1-18255117159@163.com> References: <20250516165518.125495-1-18255117159@163.com> X-Mailing-List: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Archive: , List-Subscribe: , , List-Unsubscribe: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CM-TRANSID:_____wB3lOX6bSdoVElgBw--.64634S4 X-Coremail-Antispam: 1Uf129KBjvJXoW7tr18XFyrtr4fZF1DAFWDurg_yoW5Jr17pF W5Aa48Ar4rGF1rXa1kZ3W8ua4rXwnIq34fCayfG393uF13Aa4fJwn3tFy7ZF1xJrWkur1a yF4Yyr17ur45JaUanT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDUYxBIdaVFxhVjvjDU0xZFpf9x07jn3ktUUUUU= X-Originating-IP: [124.79.128.52] X-CM-SenderInfo: rpryjkyvrrlimvzbiqqrwthudrp/1tbiWwFPo2gnaWRvgQAAsa From: Hans Zhang Add a new "aer_panic" kernel parameter to force panic on unrecoverable PCIe errors. This prepares for handling fatal AER errors in systems where bus hangs require immediate reboot. Signed-off-by: Hans Zhang --- drivers/pci/pci.c | 2 ++ drivers/pci/pci.h | 2 ++ drivers/pci/pcie/aer.c | 6 ++++++ 3 files changed, 10 insertions(+) diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index e77d5b53c0ce..663454135224 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -6821,6 +6821,8 @@ static int __init pci_setup(char *str) pcie_ats_disabled = true; } else if (!strcmp(str, "noaer")) { pci_no_aer(); + } else if (!strcmp(str, "aer_panic")) { + pci_aer_panic(); } else if (!strcmp(str, "earlydump")) { pci_early_dump = true; } else if (!strncmp(str, "realloc=", 8)) { diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h index b81e99cd4b62..8ddfc1677eeb 100644 --- a/drivers/pci/pci.h +++ b/drivers/pci/pci.h @@ -958,6 +958,7 @@ static inline void of_pci_remove_host_bridge_node(struct pci_host_bridge *bridge #ifdef CONFIG_PCIEAER void pci_no_aer(void); +void pci_aer_panic(void); void pci_aer_init(struct pci_dev *dev); void pci_aer_exit(struct pci_dev *dev); extern const struct attribute_group aer_stats_attr_group; @@ -968,6 +969,7 @@ void pci_save_aer_state(struct pci_dev *dev); void pci_restore_aer_state(struct pci_dev *dev); #else static inline void pci_no_aer(void) { } +static inline void pci_aer_panic(void) { } static inline void pci_aer_init(struct pci_dev *d) { } static inline void pci_aer_exit(struct pci_dev *d) { } static inline void pci_aer_clear_fatal_status(struct pci_dev *dev) { } diff --git a/drivers/pci/pcie/aer.c b/drivers/pci/pcie/aer.c index ade98c5a19b9..fa51fb8a5fe7 100644 --- a/drivers/pci/pcie/aer.c +++ b/drivers/pci/pcie/aer.c @@ -112,6 +112,7 @@ struct aer_stats { PCI_ERR_ROOT_MULTI_UNCOR_RCV) static bool pcie_aer_disable; +static bool pcie_aer_panic; static pci_ers_result_t aer_root_reset(struct pci_dev *dev); void pci_no_aer(void) @@ -119,6 +120,11 @@ void pci_no_aer(void) pcie_aer_disable = true; } +void pci_aer_panic(void) +{ + pcie_aer_panic = true; +} + bool pci_aer_available(void) { return !pcie_aer_disable && pci_msi_enabled(); -- 2.25.1