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=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,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 D7E85C43144 for ; Thu, 28 Jun 2018 08:58:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8BB092522D for ; Thu, 28 Jun 2018 08:58:52 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 8BB092522D 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 S933640AbeF1I6u (ORCPT ); Thu, 28 Jun 2018 04:58:50 -0400 Received: from mx3-rdu2.redhat.com ([66.187.233.73]:49422 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S933153AbeF1I6o (ORCPT ); Thu, 28 Jun 2018 04:58:44 -0400 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.rdu2.redhat.com [10.11.54.4]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id C2D62C12A0; Thu, 28 Jun 2018 08:58:43 +0000 (UTC) Received: from localhost.localdomain.com (ovpn-12-163.pek2.redhat.com [10.72.12.163]) by smtp.corp.redhat.com (Postfix) with ESMTP id E1C482026D6A; Thu, 28 Jun 2018 08:58:37 +0000 (UTC) From: Lianbo Jiang To: linux-kernel@vger.kernel.org Cc: mingo@redhat.com, tglx@linutronix.de, hpa@zytor.com, ebiederm@xmission.com, joro@8bytes.org, thomas.lendacky@amd.com, dyoung@redhat.com, kexec@lists.infradead.org, iommu@lists.linux-foundation.org, bhe@redhat.com Subject: [PATCH 4/5 V4] Adjust some permanent mappings in unencrypted ways for kdump when SME is enabled. Date: Thu, 28 Jun 2018 16:58:05 +0800 Message-Id: <20180628085806.9280-5-lijiang@redhat.com> In-Reply-To: <20180628085806.9280-1-lijiang@redhat.com> References: <20180628085806.9280-1-lijiang@redhat.com> X-Scanned-By: MIMEDefang 2.78 on 10.11.54.4 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.1]); Thu, 28 Jun 2018 08:58:43 +0000 (UTC) X-Greylist: inspected by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.1]); Thu, 28 Jun 2018 08:58:43 +0000 (UTC) for IP:'10.11.54.4' DOMAIN:'int-mx04.intmail.prod.int.rdu2.redhat.com' HELO:'smtp.corp.redhat.com' FROM:'lijiang@redhat.com' RCPT:'' Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org For kdump, the acpi table and dmi table will need to be remapped in unencrypted ways during early init, they have just a simple wrapper around early_memremap(), but the early_memremap() remaps the memory in encrypted ways by default when SME is enabled, so we put some logic into the early_memremap_pgprot_adjust(), which will have an opportunity to adjust it. Signed-off-by: Lianbo Jiang --- arch/x86/mm/ioremap.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/arch/x86/mm/ioremap.c b/arch/x86/mm/ioremap.c index e01e6c6..3c1c8c4 100644 --- a/arch/x86/mm/ioremap.c +++ b/arch/x86/mm/ioremap.c @@ -689,8 +689,17 @@ pgprot_t __init early_memremap_pgprot_adjust(resource_size_t phys_addr, encrypted_prot = true; if (sme_active()) { + /* + * In kdump mode, the acpi table and dmi table will need to + * be remapped in unencrypted ways during early init when + * SME is enabled. They have just a simple wrapper around + * early_memremap(), but the early_memremap() remaps the + * memory in encrypted ways by default when SME is enabled, + * so we must adjust it. + */ if (early_memremap_is_setup_data(phys_addr, size) || - memremap_is_efi_data(phys_addr, size)) + memremap_is_efi_data(phys_addr, size) || + is_kdump_kernel()) encrypted_prot = false; } -- 2.9.5