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[114.74.229.70]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-211057071fasm60567525ad.84.2024.11.04.04.43.01 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 04 Nov 2024 04:43:05 -0800 (PST) From: Orange Kao To: tony.luck@intel.com, qiuxu.zhuo@intel.com Cc: bp@alien8.de, james.morse@arm.com, orange@kaosy.org, linux-edac@vger.kernel.org, linux-kernel@vger.kernel.org, mchehab@kernel.org, rric@kernel.org, Orange Kao Subject: [PATCH 1/3] EDAC/igen6: Avoid segmentation fault when rmmod Date: Mon, 4 Nov 2024 12:40:52 +0000 Message-ID: <20241104124237.124109-2-orange@aiven.io> X-Mailer: git-send-email 2.47.0 In-Reply-To: <20241104124237.124109-1-orange@aiven.io> References: <20241104124237.124109-1-orange@aiven.io> 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 Content-Type: text/plain; charset="utf-8" The segmentation fault happens because During modprobe: 1. In igen6_probe(), igen6_pvt will be allocated with kzalloc() 2. In igen6_register_mci(), mci->pvt_info will point to &igen6_pvt->imc[mc] During rmmod: 1. In mci_release() in edac_mc.c, it will kfree(mci->pvt_info) 2. In igen6_remove(), it will kfree(igen6_pvt); Fix this issue by setting mci->pvt_info to NULL to avoid the double kfree. Fixes: 10590a9d4f23 ("EDAC/igen6: Add EDAC driver for Intel client SoCs usi= ng IBECC") Closes: https://bugzilla.kernel.org/show_bug.cgi?id=3D219360 Signed-off-by: Orange Kao --- drivers/edac/igen6_edac.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/edac/igen6_edac.c b/drivers/edac/igen6_edac.c index 189a2fc29e74..07dacf8c10be 100644 --- a/drivers/edac/igen6_edac.c +++ b/drivers/edac/igen6_edac.c @@ -1245,6 +1245,7 @@ static int igen6_register_mci(int mc, u64 mchbar, str= uct pci_dev *pdev) imc->mci =3D mci; return 0; fail3: + mci->pvt_info =3D NULL; kfree(mci->ctl_name); fail2: edac_mc_free(mci); @@ -1269,6 +1270,7 @@ static void igen6_unregister_mcis(void) =20 edac_mc_del_mc(mci->pdev); kfree(mci->ctl_name); + mci->pvt_info =3D NULL; edac_mc_free(mci); iounmap(imc->window); } --=20 2.47.0 From nobody Sun Nov 24 16:49:17 2024 Received: from mail-lf1-f54.google.com (mail-lf1-f54.google.com [209.85.167.54]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id EE5B51B2EEB for ; Mon, 4 Nov 2024 12:43:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.167.54 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730724206; cv=none; b=h2ZtmG1KOm0oIcFIFSOby3CduvIR0Mcc3AnTZ5WP/JXx4oQJUw4K2aqy6QYx8VSHuU00YTWR2RbM4SI46WdZuaWXaaD4epegF6LuEPCea0p1nymxypwwLUoH3UY3hHzT25pUBxVp0MOwudJhhxnIMCnN8+apLGdIhdm+9vZt6lQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730724206; c=relaxed/simple; bh=avSNu0jxcOX+JToYoKPOxXqXoAKAFU2u/PiZkiumz/U=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=kspQVOcT+IiHHnxF2wVLTDDrLhxdBijkCNwITc+s8KBXpqHDK/zlbRpxOfOqzUFsp8lXbJbOSrW3Uwkv0PFYrYuHNW0t5mle/0ej0zdHzaxFVBkX2BNvjmVKXL1hhDFg4RYFMP0yorb8PQ31jCOkCiar9fM0FFw7E4XSrX7LSu8= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=aiven.io; spf=pass smtp.mailfrom=aiven.io; dkim=pass (1024-bit key) header.d=aiven.io header.i=@aiven.io header.b=JSZMFep2; arc=none smtp.client-ip=209.85.167.54 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=aiven.io Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=aiven.io Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=aiven.io header.i=@aiven.io header.b="JSZMFep2" Received: by mail-lf1-f54.google.com with SMTP id 2adb3069b0e04-539e63c8678so4633639e87.0 for ; Mon, 04 Nov 2024 04:43:24 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=aiven.io; s=google; t=1730724203; x=1731329003; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=2T1FnuxuOLfXTEuPhFAXlYWlJnV3S7rPr9KDCR50D/U=; b=JSZMFep2+hq9DcSVHC7sstW9ORzuhIYb/WjoZ2cCJ6lrxt6rYifb3rsYg5GkpApBKD MQ90KTEbs5TJ56mIECQxnd0PbegVvOibrVfP5LNQeCQvkS6k7sm8T6al34jEzBbiffeD 263ZDS7JSIOqADj6fbWImvjU8e8B5HhJE7YpE= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1730724203; x=1731329003; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=2T1FnuxuOLfXTEuPhFAXlYWlJnV3S7rPr9KDCR50D/U=; b=A5cgj+tnnFyzCgoL5whftDUOr3t0F1WvR8IAp6PzMJ9fOcIUD7EQXIkoLc4q18l+3s 7+eowLRJtQXpFe1bYAE62CxArEyG/VEwg5GIMEQclJSMT6v/t3qL7huWAJazTrDQbnRg MwhkSHwziRMke+0dSOGxH4JnU3TARJy9rLFGDvDaVbv8OGoRl3Ke1fUfYtiiDRdoCuA+ XBpKztxTROh3Xf1ORo34TXivQ2oMjceCf8tDjJXwFd4W/0qBDlHPnDZNo1VsU1pCVE5E CciZ40TUxsmbTc95UDDmHDTdrM+tCTbs1pazJbBabgLaamZiue88OaoAtqWPCyjmtQYP xQKg== X-Forwarded-Encrypted: i=1; AJvYcCXTAo8RwRIdjSVt/IIdJgawR3Q4gsgg6xQKKGDck38Vn0iWz+PpmpIpayyu2YG6rlcd1RXNI28OYiI4htM=@vger.kernel.org X-Gm-Message-State: AOJu0YzSQIb4bHDX9neFzkWCcQy4SMAL53pDOa/d9Pu/Tdr4qgmLrPj3 ZFgwCtBgHYhHStzjTGdej4on9326NcYeRw1yf30oSMLvf2CxpKgb776Vw2UqP7I= X-Google-Smtp-Source: AGHT+IHy1cqxEDldE+jOPeivOL7psrHsxOIdD/UD+h/Dzy5pOzG/4GiogDeZsSMbjYh7bZiqKhM2FQ== X-Received: by 2002:a05:6512:1089:b0:539:959e:f0e8 with SMTP id 2adb3069b0e04-53d65de8ba0mr5390339e87.21.1730724203018; Mon, 04 Nov 2024 04:43:23 -0800 (PST) Received: from ox.aiven-management.aivencloud.com (n114-74-229-70.bla3.nsw.optusnet.com.au. [114.74.229.70]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-211057071fasm60567525ad.84.2024.11.04.04.43.19 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 04 Nov 2024 04:43:22 -0800 (PST) From: Orange Kao To: tony.luck@intel.com, qiuxu.zhuo@intel.com Cc: bp@alien8.de, james.morse@arm.com, orange@kaosy.org, linux-edac@vger.kernel.org, linux-kernel@vger.kernel.org, mchehab@kernel.org, rric@kernel.org Subject: [PATCH 2/3] EDAC/igen6: Initialize edac_op_state according to the configuration data Date: Mon, 4 Nov 2024 12:40:53 +0000 Message-ID: <20241104124237.124109-3-orange@aiven.io> X-Mailer: git-send-email 2.47.0 In-Reply-To: <20241104124237.124109-1-orange@aiven.io> References: <20241104124237.124109-1-orange@aiven.io> 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 Content-Type: text/plain; charset="utf-8" From: Qiuxu Zhuo Currently, igen6_edac sets edac_op_state to EDAC_OPSTATE_NMI, while the driver also supports memory errors reported from Machine Check. Initialize edac_op_state to the correct value according to the configuration data that the driver probed. Signed-off-by: Qiuxu Zhuo --- drivers/edac/igen6_edac.c | 13 +++++++++++-- 1 file changed, 11 insertions(+), 2 deletions(-) diff --git a/drivers/edac/igen6_edac.c b/drivers/edac/igen6_edac.c index 07dacf8c10be..fa488ba15059 100644 --- a/drivers/edac/igen6_edac.c +++ b/drivers/edac/igen6_edac.c @@ -1350,6 +1350,15 @@ static void unregister_err_handler(void) unregister_nmi_handler(NMI_SERR, IGEN6_NMI_NAME); } =20 +static void opstate_set(struct res_config *cfg) +{ + /* Set the mode according to the configuration data. */ + if (cfg->machine_check) + edac_op_state =3D EDAC_OPSTATE_INT; + else + edac_op_state =3D EDAC_OPSTATE_NMI; +} + static int igen6_probe(struct pci_dev *pdev, const struct pci_device_id *e= nt) { u64 mchbar; @@ -1367,6 +1376,8 @@ static int igen6_probe(struct pci_dev *pdev, const st= ruct pci_device_id *ent) if (rc) goto fail; =20 + opstate_set(res_cfg); + for (i =3D 0; i < res_cfg->num_imc; i++) { rc =3D igen6_register_mci(i, mchbar, pdev); if (rc) @@ -1450,8 +1461,6 @@ static int __init igen6_init(void) if (owner && strncmp(owner, EDAC_MOD_STR, sizeof(EDAC_MOD_STR))) return -EBUSY; =20 - edac_op_state =3D EDAC_OPSTATE_NMI; - rc =3D pci_register_driver(&igen6_driver); if (rc) return rc; --=20 2.47.0 From nobody Sun Nov 24 16:49:17 2024 Received: from mail-lf1-f51.google.com (mail-lf1-f51.google.com [209.85.167.51]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id BE6A91E4B0 for ; Mon, 4 Nov 2024 12:43:37 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.167.51 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730724219; cv=none; b=nuq93lxHz3oInv5tShm2YrI5aMD3c6wQZvy5GVnJTKj0iu9qK4w0XN0NWgE55ldpchs70mqfhcLeLY1QB1XpdRrR8Ey63aVEr0g7d80VwpeXGBzNmbPzN4l9xD55SoAMZWmvbs4/Kd7RUuNusn8CwJNIfn5GZ417/61HgKzHnQE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730724219; c=relaxed/simple; bh=cKR4mIuxU+pZHomU02/B0JOA4nMGY2eIkkwjNLsRKNY=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=ecHxtX4rztw2qiDegfn56J7037dMbBLG9G0bUoj9KenkmUeEN+UIES1Dp9kqY+gAE7IhvQtjp2giusatE7yUnqXROp9llybtCDcceBLUqF/vkG1POkoefa6F2Syt29f/sSOo8v8PCrNlW+0sF/vjUJRcwIYasV8Y7vs8y1WetFg= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=aiven.io; spf=pass smtp.mailfrom=aiven.io; dkim=pass (1024-bit key) header.d=aiven.io header.i=@aiven.io header.b=ex9uBBY5; arc=none smtp.client-ip=209.85.167.51 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=aiven.io Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=aiven.io Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=aiven.io header.i=@aiven.io header.b="ex9uBBY5" Received: by mail-lf1-f51.google.com with SMTP id 2adb3069b0e04-53b13ea6b78so6345241e87.2 for ; Mon, 04 Nov 2024 04:43:37 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=aiven.io; s=google; t=1730724216; x=1731329016; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=1QxRN4fIUmMgqqmSgoGjRQ84Tw++DtIiEKSH0O+MnK4=; b=ex9uBBY5BoPmeZEYOkkqs5MmvLHPMHBW4wU5ueDB21fohSdWEnDsubzQe5oKZ4iP1S UeaoWNDwqPcucHQ/J1DoRwOZfk4J/1EUJKrAxyG4Vu3cCWvplxIGnwmwizXycFLGc0IC Z48WS0SXvsB5RJn4B+/aa0Ij/GIiJjj0djWGk= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1730724216; x=1731329016; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=1QxRN4fIUmMgqqmSgoGjRQ84Tw++DtIiEKSH0O+MnK4=; b=tF6iOVNKnPM477VepqSSLjfphWLOg+2IaSh+tG1620Vbrn1mpo9L4k192fUT56pTZ/ Mx9BvtOi6xS8JdR3zXbsvVXq4QHd38uEOkii+eZ+fYW91CgRCwpauLFNH/vhEg0VRJ26 iXB5M3hTpSuizQJQmRAc+ewjhcvtm+qmvIlbI2Sf5CVoEQAAlQMMpDQFsaop3O/bjSN3 bkeptOwGp8OStu76SACYCY0vsEHj2aDlc6xWBt173YNHwa3C+MCMkRzl94AZTV1UsPwe 4frfa2z1b7DA204ToeqTfNW9O6Dz6xdKFNGe89sL8IvHARaF/A3/vjKXvc8nMH1FDzHi y4MA== X-Forwarded-Encrypted: i=1; AJvYcCWLQdLpsPUOBZxAy0VaWC53qGdEVmaloja1qdhW5WBwpsGntrqqq6kHLUjTwn9fkYFT4w+6Mk77kO114Ac=@vger.kernel.org X-Gm-Message-State: AOJu0YwwGqRx8pNQvznp78a76twng2iueIq/DETIPYG+/bfMdBVKMYyl 3/byio9/Kfdp//A2oNXo3rGC6FLLmdVTnHAUUVkf7UQS3t2zlUPQnK8ekk0bcko= X-Google-Smtp-Source: AGHT+IGgBMF58yJeGdFQky+NLdR4fiA6k5ZEPcqTxWYN7oXWvE3Y7NIIuc+Tgxb0I33E3BFKHU/hWQ== X-Received: by 2002:a05:6512:2350:b0:53b:7ecc:5ddf with SMTP id 2adb3069b0e04-53d65df1a08mr7897714e87.26.1730724215737; Mon, 04 Nov 2024 04:43:35 -0800 (PST) Received: from ox.aiven-management.aivencloud.com (n114-74-229-70.bla3.nsw.optusnet.com.au. [114.74.229.70]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-211057071fasm60567525ad.84.2024.11.04.04.43.31 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 04 Nov 2024 04:43:35 -0800 (PST) From: Orange Kao To: tony.luck@intel.com, qiuxu.zhuo@intel.com Cc: bp@alien8.de, james.morse@arm.com, orange@kaosy.org, linux-edac@vger.kernel.org, linux-kernel@vger.kernel.org, mchehab@kernel.org, rric@kernel.org, Orange Kao Subject: [PATCH 3/3] EDAC/igen6: Add polling support Date: Mon, 4 Nov 2024 12:40:54 +0000 Message-ID: <20241104124237.124109-4-orange@aiven.io> X-Mailer: git-send-email 2.47.0 In-Reply-To: <20241104124237.124109-1-orange@aiven.io> References: <20241104124237.124109-1-orange@aiven.io> 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 Content-Type: text/plain; charset="utf-8" Some PCs with Intel N100 (with PCI device 8086:461c, DID_ADL_N_SKU4) experienced issues with error interrupts not working, even with the following configuration in the BIOS. In-Band ECC Support: Enabled In-Band ECC Operation Mode: 2 (make all requests protected and ignore range checks) IBECC Error Injection Control: Inject Correctable Error on insertion counter Error Injection Insertion Count: 251658240 (0xf000000) Add polling mode support for these machines to ensure that memory error events are handled. Signed-off-by: Orange Kao --- drivers/edac/igen6_edac.c | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) diff --git a/drivers/edac/igen6_edac.c b/drivers/edac/igen6_edac.c index fa488ba15059..eb783c6b77f1 100644 --- a/drivers/edac/igen6_edac.c +++ b/drivers/edac/igen6_edac.c @@ -1170,6 +1170,20 @@ static int igen6_pci_setup(struct pci_dev *pdev, u64= *mchbar) return -ENODEV; } =20 +static void igen6_check(struct mem_ctl_info *mci) +{ + struct igen6_imc *imc =3D mci->pvt_info; + u64 ecclog; + + /* errsts_clear() isn't NMI-safe. Delay it in the IRQ context */ + ecclog =3D ecclog_read_and_clear(imc); + if (!ecclog) + return; + + if (!ecclog_gen_pool_add(imc->mc, ecclog)) + irq_work_queue(&ecclog_irq_work); +} + static int igen6_register_mci(int mc, u64 mchbar, struct pci_dev *pdev) { struct edac_mc_layer layers[2]; @@ -1211,6 +1225,8 @@ static int igen6_register_mci(int mc, u64 mchbar, str= uct pci_dev *pdev) mci->edac_cap =3D EDAC_FLAG_SECDED; mci->mod_name =3D EDAC_MOD_STR; mci->dev_name =3D pci_name(pdev); + if (edac_op_state =3D=3D EDAC_OPSTATE_POLL) + mci->edac_check =3D igen6_check; mci->pvt_info =3D &igen6_pvt->imc[mc]; =20 imc =3D mci->pvt_info; @@ -1352,6 +1368,10 @@ static void unregister_err_handler(void) =20 static void opstate_set(struct res_config *cfg) { + /* Only the polling mode can be set via the module parameter. */ + if (edac_op_state =3D=3D EDAC_OPSTATE_POLL) + return; + /* Set the mode according to the configuration data. */ if (cfg->machine_check) edac_op_state =3D EDAC_OPSTATE_INT; @@ -1483,3 +1503,6 @@ module_exit(igen6_exit); MODULE_LICENSE("GPL v2"); MODULE_AUTHOR("Qiuxu Zhuo"); MODULE_DESCRIPTION("MC Driver for Intel client SoC using In-Band ECC"); + +module_param(edac_op_state, int, 0444); +MODULE_PARM_DESC(edac_op_state, "EDAC Error Reporting state: 0=3DPoll, Oth= ers or default=3DAuto detect"); --=20 2.47.0