From nobody Fri Dec 19 20:38:01 2025 Received: from m16.mail.163.com (m16.mail.163.com [220.197.31.5]) by smtp.subspace.kernel.org (Postfix) with ESMTP id E3EE3222574; Fri, 16 May 2025 16:56:11 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=220.197.31.5 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747414575; cv=none; b=U/w0eHRJZGAlsHiQ7fZvwCiYNfnEStp94H80zYYn+2JgsVOLxDu8l09dnEbjjjeB/NgyNvBxSpQ7MfDMjKTbU62WFKG2ucaU5Vr+pPiZfqEHW4JyBzJjjltAKVhpA5d69cgrU+VyFkTk2HvcD7ejKXTiuWc3o6zeiE0tLimL4cM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747414575; c=relaxed/simple; bh=TIDsyO8zNvHhbmAf26QKPKrH/NqAQswaf+M/Ttjj8Sg=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=UCGPTKV9vU0psWeKY2trJdonk+2LRv+qd4YbN7Zy00zhieziwaNKnXHHUxZOteA4jk/cbtWl2FpmmPOKsK0tyOYv7q/oTV8ZbH3oiBZJu1H/RZww/592bXkyF4Cj3lO+60gVLb5a11RnFXhLjX2tZ+U/8WKQEzQHg354HRi5lpU= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=163.com; spf=pass smtp.mailfrom=163.com; dkim=pass (1024-bit key) header.d=163.com header.i=@163.com header.b=W4GHeuHb; arc=none smtp.client-ip=220.197.31.5 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=163.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=163.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=163.com header.i=@163.com header.b="W4GHeuHb" 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> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: _____wB3lOX6bSdoVElgBw--.64634S4 X-Coremail-Antispam: 1Uf129KBjvJXoW7tr18XFyrtr4fZF1DAFWDurg_yoW5Jr17pF W5Aa48Ar4rGF1rXa1kZ3W8ua4rXwnIq34fCayfG393uF13Aa4fJwn3tFy7ZF1xJrWkur1a yF4Yyr17ur45JaUanT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDUYxBIdaVFxhVjvjDU0xZFpf9x07jn3ktUUUUU= X-CM-SenderInfo: rpryjkyvrrlimvzbiqqrwthudrp/1tbiWwFPo2gnaWRvgQAAsa Content-Type: text/plain; charset="utf-8" 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 =3D 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 =3D true; } else if (!strncmp(str, "realloc=3D", 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(struc= t pci_host_bridge *bridge =20 #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) =20 static bool pcie_aer_disable; +static bool pcie_aer_panic; static pci_ers_result_t aer_root_reset(struct pci_dev *dev); =20 void pci_no_aer(void) @@ -119,6 +120,11 @@ void pci_no_aer(void) pcie_aer_disable =3D true; } =20 +void pci_aer_panic(void) +{ + pcie_aer_panic =3D true; +} + bool pci_aer_available(void) { return !pcie_aer_disable && pci_msi_enabled(); --=20 2.25.1