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=-6.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS 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 C4C31C67863 for ; Mon, 22 Oct 2018 07:47:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 93F7F20779 for ; Mon, 22 Oct 2018 07:47:43 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 93F7F20779 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727756AbeJVQFE (ORCPT ); Mon, 22 Oct 2018 12:05:04 -0400 Received: from mx1.redhat.com ([209.132.183.28]:41942 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727135AbeJVQFE (ORCPT ); Mon, 22 Oct 2018 12:05:04 -0400 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 947AA81DF1; Mon, 22 Oct 2018 07:47:41 +0000 (UTC) Received: from localhost.localdomain.com (ovpn-12-68.pek2.redhat.com [10.72.12.68]) by smtp.corp.redhat.com (Postfix) with ESMTP id 077B96EE20; Mon, 22 Oct 2018 07:47:31 +0000 (UTC) From: Lianbo Jiang To: linux-kernel@vger.kernel.org Cc: kexec@lists.infradead.org, x86@kernel.org, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, thomas.lendacky@amd.com, dyoung@redhat.com, bhe@redhat.com Subject: [PATCH 2/2 v4] x86/kexec_file: add reserved e820 ranges to kdump kernel e820 table Date: Mon, 22 Oct 2018 15:47:07 +0800 Message-Id: <20181022074707.13901-3-lijiang@redhat.com> In-Reply-To: <20181022074707.13901-1-lijiang@redhat.com> References: <20181022074707.13901-1-lijiang@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.25]); Mon, 22 Oct 2018 07:47:41 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org E820 reserved ranges is useful in kdump kernel, it has been added in kexec-tools code. One reason is PCI mmconf (extended mode) requires reserved region otherwise it falls back to legacy mode. When AMD SME kdump support, it needs to map dmi table area as decrypted. For normal boot, these ranges sit in e820 reserved ranges, thus the early ioremap code naturally map them as decrypted. If it also has same e820 reserve setup in kdump kernel then it will just work like normal kernel. Suggested-by: Dave Young Signed-off-by: Lianbo Jiang --- arch/x86/kernel/crash.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/arch/x86/kernel/crash.c b/arch/x86/kernel/crash.c index ae724a6e0a5f..d3167125800e 100644 --- a/arch/x86/kernel/crash.c +++ b/arch/x86/kernel/crash.c @@ -384,6 +384,10 @@ int crash_setup_memmap_entries(struct kimage *image, struct boot_params *params) walk_iomem_res_desc(IORES_DESC_ACPI_NV_STORAGE, flags, 0, -1, &cmd, memmap_entry_callback); + cmd.type = E820_TYPE_RESERVED; + walk_iomem_res_desc(IORES_DESC_NONE, 0, 0, -1, &cmd, + memmap_entry_callback); + /* Add crashk_low_res region */ if (crashk_low_res.end) { ei.addr = crashk_low_res.start; -- 2.17.1