From patchwork Fri Dec 18 17:40:00 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sergei Miroshnichenko X-Patchwork-Id: 1418523 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=linux-pci-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=pass (p=none dis=none) header.from=yadro.com Authentication-Results: ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=yadro.com header.i=@yadro.com header.a=rsa-sha256 header.s=mta-01 header.b=FcK8cCIw; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4CyGRl5Flmz9sVM for ; Sat, 19 Dec 2020 04:43:15 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728528AbgLRRnP (ORCPT ); Fri, 18 Dec 2020 12:43:15 -0500 Received: from mta-02.yadro.com ([89.207.88.252]:38588 "EHLO mta-01.yadro.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727967AbgLRRnO (ORCPT ); Fri, 18 Dec 2020 12:43:14 -0500 Received: from localhost (unknown [127.0.0.1]) by mta-01.yadro.com (Postfix) with ESMTP id 3BB15413BA; Fri, 18 Dec 2020 17:41:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=yadro.com; h= content-type:content-type:content-transfer-encoding:mime-version :references:in-reply-to:x-mailer:message-id:date:date:subject :subject:from:from:received:received:received; s=mta-01; t= 1608313280; x=1610127681; bh=/htqB/0rYGM6bOltjMUumNTM/7sIZv8Pvtx 4XF2+xgg=; b=FcK8cCIwE2jE6mt7pYenjiVrVnUdmweG5BDXsACp1AH1Y8IG8A/ muEFyrbnOdSkh0L1kPpWTaifm4K8xpegGOHj16Z0AseVXXnlW6RVxb+w0DMwzmXa K6MJ9jDoqZVpNlH2T2Kmjjn9gZ3C2H1lV4YbDKKdyxrnCt9FPxHiCV6k= X-Virus-Scanned: amavisd-new at yadro.com Received: from mta-01.yadro.com ([127.0.0.1]) by localhost (mta-01.yadro.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id FspDviXVrF6B; Fri, 18 Dec 2020 20:41:20 +0300 (MSK) Received: from T-EXCH-03.corp.yadro.com (t-exch-03.corp.yadro.com [172.17.100.103]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-SHA384 (256/256 bits)) (No client certificate requested) by mta-01.yadro.com (Postfix) with ESMTPS id C6CFB413C2; Fri, 18 Dec 2020 20:41:08 +0300 (MSK) Received: from NB-148.yadro.com (172.17.15.136) by T-EXCH-03.corp.yadro.com (172.17.100.103) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384_P384) id 15.1.669.32; Fri, 18 Dec 2020 20:41:08 +0300 From: Sergei Miroshnichenko To: CC: Bjorn Helgaas , Lukas Wunner , Stefan Roese , Andy Lavr , =?utf-8?q?Chris?= =?utf-8?q?tian_K=C3=B6nig?= , David Laight , Rajat Jain , , Sergei Miroshnichenko , Thomas Gleixner Subject: [PATCH v9 15/26] x86/PCI/ACPI: Fix up PCIBIOS_MIN_MEM if value computed from e820 is invalid Date: Fri, 18 Dec 2020 20:40:00 +0300 Message-ID: <20201218174011.340514-16-s.miroshnichenko@yadro.com> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20201218174011.340514-1-s.miroshnichenko@yadro.com> References: <20201218174011.340514-1-s.miroshnichenko@yadro.com> MIME-Version: 1.0 X-Originating-IP: [172.17.15.136] X-ClientProxiedBy: T-EXCH-01.corp.yadro.com (172.17.10.101) To T-EXCH-03.corp.yadro.com (172.17.100.103) Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org The value of PCIBIOS_MIN_MEM reported by BIOS 1.3 on Supermicro H11SSL-i via e820__setup_pci_gap(): [mem 0xebff1000-0xfe9fffff] available for PCI devices is only suitable for a single root complex out of four (0000:00): pci_bus 0000:00: root bus resource [mem 0xec000000-0xefffffff window] pci_bus 0000:20: root bus resource [mem 0xeb800000-0xebefffff window] pci_bus 0000:40: root bus resource [mem 0xeb200000-0xeb5fffff window] pci_bus 0000:60: root bus resource [mem 0xe8b00000-0xeaffffff window] That makes the AMD EPYC 7251 unable to assign BARs of devices hot-added in those three unlucky RCs (0000:20, 0000:40 and 0000:60). If there are apertures that end below the current PCIBIOS_MIN_MEM (which is a variable pci_mem_start on x86), adjust it to the aperture's start. CC: Thomas Gleixner Signed-off-by: Sergei Miroshnichenko --- arch/x86/pci/acpi.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/arch/x86/pci/acpi.c b/arch/x86/pci/acpi.c index 948656069cdd..9eccb26d0bf3 100644 --- a/arch/x86/pci/acpi.c +++ b/arch/x86/pci/acpi.c @@ -299,6 +299,21 @@ static int pci_acpi_root_prepare_resources(struct acpi_pci_root_info *ci) int status; status = acpi_pci_probe_root_resources(ci); + + resource_list_for_each_entry(entry, &ci->resources) { + struct resource *res = entry->res; + + if (!(res->flags & IORESOURCE_MEM) || + res->end > pci_mem_start || + res->start == 0xa0000) + continue; + + dev_warn(&ci->root->device->dev, "Fix up PCI start address: %lx -> %llx\n", + pci_mem_start, res->start); + + pci_mem_start = res->start; + } + if (pci_use_crs) { resource_list_for_each_entry_safe(entry, tmp, &ci->resources) if (resource_is_pcicfg_ioport(entry->res))