From patchwork Mon Mar 14 11:54:57 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 551217 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id BBDEEC433FE for ; Mon, 14 Mar 2022 12:23:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241287AbiCNMYf (ORCPT ); Mon, 14 Mar 2022 08:24:35 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49010 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S243961AbiCNMVZ (ORCPT ); Mon, 14 Mar 2022 08:21:25 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 09D0913D47; Mon, 14 Mar 2022 05:19:38 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id B7C5BB80DF6; Mon, 14 Mar 2022 12:19:36 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 079C5C340E9; Mon, 14 Mar 2022 12:19:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1647260375; bh=yMZ/o/Z9AaWrbnYeggMSBdhryGgzxhbFKPYHZNO4BFA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=OysTmPC+Ug+zusT7EeBgUdlLdkcDrwXYzRQlCV89Tx84ho9pSSunaKYaviu6IYhbV bJ4duC7Qw/71u25vxCsLQ7iASpHriOQzldNApRGTf8yhLmjz9PkR3eNuPeBU+mrOd5 bwdncXKyMlnfvpIcBPv9bP4no6KSDnPfLVSwvusU= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Ross Philipson , Borislav Petkov , Daniel Kiper Subject: [PATCH 5.16 114/121] x86/boot: Add setup_indirect support in early_memremap_is_setup_data() Date: Mon, 14 Mar 2022 12:54:57 +0100 Message-Id: <20220314112747.289569251@linuxfoundation.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220314112744.120491875@linuxfoundation.org> References: <20220314112744.120491875@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Ross Philipson commit 445c1470b6ef96440e7cfc42dfc160f5004fd149 upstream. The x86 boot documentation describes the setup_indirect structures and how they are used. Only one of the two functions in ioremap.c that needed to be modified to be aware of the introduction of setup_indirect functionality was updated. Adds comparable support to the other function where it was missing. Fixes: b3c72fc9a78e ("x86/boot: Introduce setup_indirect") Signed-off-by: Ross Philipson Signed-off-by: Borislav Petkov Reviewed-by: Daniel Kiper Cc: Link: https://lore.kernel.org/r/1645668456-22036-3-git-send-email-ross.philipson@oracle.com Signed-off-by: Greg Kroah-Hartman --- arch/x86/mm/ioremap.c | 33 +++++++++++++++++++++++++++++++-- 1 file changed, 31 insertions(+), 2 deletions(-) --- a/arch/x86/mm/ioremap.c +++ b/arch/x86/mm/ioremap.c @@ -676,22 +676,51 @@ static bool memremap_is_setup_data(resou static bool __init early_memremap_is_setup_data(resource_size_t phys_addr, unsigned long size) { + struct setup_indirect *indirect; struct setup_data *data; u64 paddr, paddr_next; paddr = boot_params.hdr.setup_data; while (paddr) { - unsigned int len; + unsigned int len, size; if (phys_addr == paddr) return true; data = early_memremap_decrypted(paddr, sizeof(*data)); + if (!data) { + pr_warn("failed to early memremap setup_data entry\n"); + return false; + } + + size = sizeof(*data); paddr_next = data->next; len = data->len; - early_memunmap(data, sizeof(*data)); + if ((phys_addr > paddr) && (phys_addr < (paddr + len))) { + early_memunmap(data, sizeof(*data)); + return true; + } + + if (data->type == SETUP_INDIRECT) { + size += len; + early_memunmap(data, sizeof(*data)); + data = early_memremap_decrypted(paddr, size); + if (!data) { + pr_warn("failed to early memremap indirect setup_data\n"); + return false; + } + + indirect = (struct setup_indirect *)data->data; + + if (indirect->type != SETUP_INDIRECT) { + paddr = indirect->addr; + len = indirect->len; + } + } + + early_memunmap(data, size); if ((phys_addr > paddr) && (phys_addr < (paddr + len))) return true;