From patchwork Sat Jun 15 00:23:58 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Benjamin Herrenschmidt X-Patchwork-Id: 10996907 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id C7D80112C for ; Sat, 15 Jun 2019 00:30:27 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id AA29228707 for ; Sat, 15 Jun 2019 00:30:27 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 9DA152870F; Sat, 15 Jun 2019 00:30:27 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 52C3A28707 for ; Sat, 15 Jun 2019 00:30:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:References: In-Reply-To:Message-Id:Date:Subject:To:From:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=T4iEYzJK3MzPBDs4Ej1rjuF27rjAiRzdiuCjWXSaB4c=; b=GyljkACYjHD0kVpoOIf930Qp4P d1mS11vTwBYMz+yoWUUkZV9at6bjd9rRikdLBYmr2XTsmoUFQ32HxJhE5ocToQXS8jhSJ0Hp/I59k FA4mlSknhmiZ83eiAa7eNofJoANH1bOPj2kq+iAT4LU3hBb1WB2t8XFyh4IpxHtiMAlWsmYFmSYak EcQ4joyZTu+g3JaV00mUMGtV96FQKcRzagm67jB0WvBCc0Zus7Z7PD7TmZ6N94aYJwC1JbNcf49wL +HF7OoLO2ZgHGNvrEpYP/uFu/H58HpYPJ9SFAYncd9tidXjV4R1vLQTrHmSAtfDPDTTZt3Yh6Dn9j lB4J3Fww==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1hbwaH-0001HD-2b; Sat, 15 Jun 2019 00:30:17 +0000 Received: from gate.crashing.org ([63.228.1.57]) by bombadil.infradead.org with esmtps (Exim 4.92 #3 (Red Hat Linux)) id 1hbwa1-0008HK-0M for linux-arm-kernel@lists.infradead.org; Sat, 15 Jun 2019 00:30:02 +0000 Received: from ufdda393ec48b57.ant.amazon.com (localhost.localdomain [127.0.0.1]) by gate.crashing.org (8.14.1/8.14.1) with ESMTP id x5F0TfFS010961; Fri, 14 Jun 2019 19:29:50 -0500 From: Benjamin Herrenschmidt To: linux-pci@vger.kernel.org Subject: [PATCH 3/4] pci: Do not auto-enable PCI reallocation when _DSM #5 returns 0 Date: Sat, 15 Jun 2019 10:23:58 +1000 Message-Id: <20190615002359.29577-3-benh@kernel.crashing.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190615002359.29577-1-benh@kernel.crashing.org> References: <20190615002359.29577-1-benh@kernel.crashing.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190614_173001_196504_37AC4E7C X-CRM114-Status: UNSURE ( 6.38 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Lorenzo Pieralisi , Ard Biesheuvel , Benjamin Herrenschmidt , Sinan Kaya , Zeev Zilberman , linux-arm-kernel , Bjorn Helgaas , Ali Saidi MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP This prevents auto-enabling of bridges reallocation when the FW tells us that the initial configuration must be preserved for a given host bridge. Signed-off-by: Benjamin Herrenschmidt --- drivers/pci/setup-bus.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c index 0cdd5ff389de..049a5602b942 100644 --- a/drivers/pci/setup-bus.c +++ b/drivers/pci/setup-bus.c @@ -1684,10 +1684,16 @@ static enum enable_type pci_realloc_detect(struct pci_bus *bus, enum enable_type enable_local) { bool unassigned = false; + struct pci_host_bridge *hb; if (enable_local != undefined) return enable_local; + /* Don't realloc if ACPI tells us not to */ + hb = pci_find_host_bridge(bus); + if (hb->preserve_config) + return auto_disabled; + pci_walk_bus(bus, iov_resources_unassigned, &unassigned); if (unassigned) return auto_enabled;