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=-10.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 EE791C433E8 for ; Mon, 20 Jul 2020 16:17:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C84482064B for ; Mon, 20 Jul 2020 16:17:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1595261820; bh=7YEzp2TLeeENKUeWqMUIHBobc/q7bF3zjTbqOeIN1Ps=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=0qocXFuHmvBWO/Q1hoLW6zLEAlHKlivDfrTC6d9LjeyWaxGO6tnuNEkaCQPmBNp3K RGD/Tk086lI506rBRu60JWNHnxACXR0Em5Odr7oU+PLB+GaMqJhIyO9C1fyJAzBhvx PH9/ZGk0xHASXyQFP+SvOjcBTb+LZheUJK1ZiHAU= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388184AbgGTQQ7 (ORCPT ); Mon, 20 Jul 2020 12:16:59 -0400 Received: from mail.kernel.org ([198.145.29.99]:58302 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387621AbgGTQQ4 (ORCPT ); Mon, 20 Jul 2020 12:16:56 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id CBF6920656; Mon, 20 Jul 2020 16:16:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1595261816; bh=7YEzp2TLeeENKUeWqMUIHBobc/q7bF3zjTbqOeIN1Ps=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=K3YfcyQdGj2Axff+yZM2Z7Tl1D8mD6NWy9s1et73O5KrrN6r9H1fw3QblIlVAIDcW CpKVLswScTa31Znerh+zBqkd4gO27KA4Qz4EBYNJn0q+EePaJGq4lqiFP3/MQBG1XA 9eY3c1ppTNlvd+j9OzcOIYIyBAKoD8FczN7kdEsQ= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Joerg Roedel , Lu Baolu Subject: [PATCH 5.7 238/244] iommu/vt-d: Make Intel SVM code 64-bit only Date: Mon, 20 Jul 2020 17:38:29 +0200 Message-Id: <20200720152837.158735106@linuxfoundation.org> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20200720152825.863040590@linuxfoundation.org> References: <20200720152825.863040590@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Lu Baolu commit 9486727f5981a5ec5c0b699fb1777451bd6786e4 upstream. Current Intel SVM is designed by setting the pgd_t of the processor page table to FLPTR field of the PASID entry. The first level translation only supports 4 and 5 level paging structures, hence it's infeasible for the IOMMU to share a processor's page table when it's running in 32-bit mode. Let's disable 32bit support for now and claim support only when all the missing pieces are ready in the future. Fixes: 1c4f88b7f1f92 ("iommu/vt-d: Shared virtual address in scalable mode") Suggested-by: Joerg Roedel Signed-off-by: Lu Baolu Link: https://lore.kernel.org/r/20200622231345.29722-2-baolu.lu@linux.intel.com Signed-off-by: Joerg Roedel Signed-off-by: Greg Kroah-Hartman --- drivers/iommu/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/iommu/Kconfig +++ b/drivers/iommu/Kconfig @@ -211,7 +211,7 @@ config INTEL_IOMMU_DEBUGFS config INTEL_IOMMU_SVM bool "Support for Shared Virtual Memory with Intel IOMMU" - depends on INTEL_IOMMU && X86 + depends on INTEL_IOMMU && X86_64 select PCI_PASID select PCI_PRI select MMU_NOTIFIER