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 X-Spam-Level: X-Spam-Status: No, score=-19.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 15FE8C4743C for ; Mon, 21 Jun 2021 16:45:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 02923610A3 for ; Mon, 21 Jun 2021 16:45:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232740AbhFUQr6 (ORCPT ); Mon, 21 Jun 2021 12:47:58 -0400 Received: from mail.kernel.org ([198.145.29.99]:37530 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233978AbhFUQp5 (ORCPT ); Mon, 21 Jun 2021 12:45:57 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 95F2161406; Mon, 21 Jun 2021 16:32:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1624293179; bh=ZOYjvPygqd9xeSZF9e2e3lFo7W6uC0aFrun7hmzr5pY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=wru6BaVx++6KQFjjdd8yxZKCy6Fbx/Qb0kHf8p5jt4sn9pumdAs39d+UsplZuz4Zf Lg8dT5YBMa1HCx9jltPlUJuAKWbJVAL2cfpg06R2J7nYp+3uuRXKligRcI31kmPLXW AnscZrELGkuQwEByejf6qQdMK6cUgpHtqJcc5db0= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, =?UTF-8?q?Antti=20J=C3=A4rvinen?= , Bjorn Helgaas , Kishon Vijay Abraham I Subject: [PATCH 5.12 126/178] PCI: Mark TI C667X to avoid bus reset Date: Mon, 21 Jun 2021 18:15:40 +0200 Message-Id: <20210621154927.070109566@linuxfoundation.org> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210621154921.212599475@linuxfoundation.org> References: <20210621154921.212599475@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Antti Järvinen commit b5cf198e74a91073d12839a3e2db99994a39995d upstream. Some TI KeyStone C667X devices do not support bus/hot reset. The PCIESS automatically disables LTSSM when Secondary Bus Reset is received and device stops working. Prevent bus reset for these devices. With this change, the device can be assigned to VMs with VFIO, but it will leak state between VMs. Reference: https://e2e.ti.com/support/processors/f/791/t/954382 Link: https://lore.kernel.org/r/20210315102606.17153-1-antti.jarvinen@gmail.com Signed-off-by: Antti Järvinen Signed-off-by: Bjorn Helgaas Reviewed-by: Kishon Vijay Abraham I Cc: stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman --- drivers/pci/quirks.c | 10 ++++++++++ 1 file changed, 10 insertions(+) --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -3578,6 +3578,16 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_A */ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_CAVIUM, 0xa100, quirk_no_bus_reset); +/* + * Some TI KeyStone C667X devices do not support bus/hot reset. The PCIESS + * automatically disables LTSSM when Secondary Bus Reset is received and + * the device stops working. Prevent bus reset for these devices. With + * this change, the device can be assigned to VMs with VFIO, but it will + * leak state between VMs. Reference + * https://e2e.ti.com/support/processors/f/791/t/954382 + */ +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_TI, 0xb005, quirk_no_bus_reset); + static void quirk_no_pm_reset(struct pci_dev *dev) { /*