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=-13.5 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_PASS,UNPARSEABLE_RELAY,URIBL_BLOCKED,USER_AGENT_GIT 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 5DAC2C43387 for ; Thu, 10 Jan 2019 21:12:02 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 2CEB9213F2 for ; Thu, 10 Jan 2019 21:12:02 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="DipJ0u12"; dkim=fail reason="signature verification failed" (2048-bit key) header.d=oracle.com header.i=@oracle.com header.b="zQ6tEafk" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2CEB9213F2 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=oracle.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:References: In-Reply-To:Message-Id:Date:Subject:To:From:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=hDKCvTeGZTyGwgVqDn2e4Pd2wP8Hh1l6GVeTgLGT4vw=; b=DipJ0u12YD0Xyvqz+izbmpl/AP NWwpAKcQJGxpaq/wuLUD86FNE07nrt4XqpriYzByhZdHWqljvOBhDLpMJSDFsZl8+4toPC0mIPZ8O wuG1eQdqKusN7k8tyMLDKJT6v+khU0zt/MhJhfXe/NRbDaCPSdGsW2evMR1iVfkdEy7UofcRxQoc1 BN7iJS8p5VAJJYmS2wS0hzrjC3VgIHZXjy4HGok6M6gsN4by041VFuIfr9IRYcgMx9Q9AkY+FRMr0 ARW1+R6I8iYBoVENBLanFWyy8Bs7+DErzdK4rBh6mHXCAE0pNxkpxaGW18lmTL4DjHw7WQOPMCFa1 xrw28hUQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1ghhcO-0002Od-2o; Thu, 10 Jan 2019 21:12:00 +0000 Received: from aserp2130.oracle.com ([141.146.126.79]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1ghhbI-0001KP-FO for linux-arm-kernel@lists.infradead.org; Thu, 10 Jan 2019 21:10:54 +0000 Received: from pps.filterd (aserp2130.oracle.com [127.0.0.1]) by aserp2130.oracle.com (8.16.0.22/8.16.0.22) with SMTP id x0AL8up0187070; Thu, 10 Jan 2019 21:10:33 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : in-reply-to : references; s=corp-2018-07-02; bh=7ze7ihNQNB91qQvcMs0AZsSJuj8aoWf893BJ5dPG2Tc=; b=zQ6tEafkYELketM9PQGIBhEggEtIFIzXE2AsxM/vjfAsKwijBbkklOA/wPl76KxUn5Er MVdeIHP/9T8pCzW9SZoZghIsrZOZNKKAoGszZc9Qr6DGVzSJOzz838a2YocF87jIomut IgACh2Uy1NML3PSo4anLaJ1jkIZukutMnbnYxOgiQzp74Yun3c8MmQMlRDscX5LdOkuD yx2o0t/4gZJlb9IkGWObtSKw/0X8YYv96FPadoHq+H/eQc4qy/uxbQrk9SCnvYbKScqz NibBrnvTaUIwc9u7cdJBxSwRG8l7RjGH1NC22eVgRnz0OLUbT7rrDDNQzRc5gx2BuKNd Wg== Received: from userv0021.oracle.com (userv0021.oracle.com [156.151.31.71]) by aserp2130.oracle.com with ESMTP id 2ptj3e9tha-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 10 Jan 2019 21:10:33 +0000 Received: from userv0121.oracle.com (userv0121.oracle.com [156.151.31.72]) by userv0021.oracle.com (8.14.4/8.14.4) with ESMTP id x0ALARtm008956 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 10 Jan 2019 21:10:27 GMT Received: from abhmp0009.oracle.com (abhmp0009.oracle.com [141.146.116.15]) by userv0121.oracle.com (8.14.4/8.13.8) with ESMTP id x0ALAQbd003774; Thu, 10 Jan 2019 21:10:26 GMT Received: from concerto.internal (/24.9.64.241) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Thu, 10 Jan 2019 13:10:26 -0800 From: Khalid Aziz To: juergh@gmail.com, tycho@tycho.ws, jsteckli@amazon.de, ak@linux.intel.com, torvalds@linux-foundation.org, liran.alon@oracle.com, keescook@google.com, konrad.wilk@oracle.com Subject: [RFC PATCH v7 07/16] arm64/mm, xpfo: temporarily map dcache regions Date: Thu, 10 Jan 2019 14:09:39 -0700 Message-Id: X-Mailer: git-send-email 2.17.1 In-Reply-To: References: In-Reply-To: References: X-Proofpoint-Virus-Version: vendor=nai engine=5900 definitions=9132 signatures=668680 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=0 malwarescore=0 phishscore=0 bulkscore=0 spamscore=0 mlxscore=0 mlxlogscore=682 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1901100164 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190110_131052_592688_5CE928D6 X-CRM114-Status: GOOD ( 16.35 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Tycho Andersen , kernel-hardening@lists.openwall.com, linux-mm@kvack.org, Khalid Aziz , deepa.srinivasan@oracle.com, steven.sistare@oracle.com, joao.m.martins@oracle.com, boris.ostrovsky@oracle.com, hch@lst.de, kanth.ghatraju@oracle.com, pradeep.vincent@oracle.com, jcm@redhat.com, tglx@linutronix.de, chris.hyser@oracle.com, linux-arm-kernel@lists.infradead.org, jmattson@google.com, andrew.cooper3@citrix.com, linux-kernel@vger.kernel.org, tyhicks@canonical.com, john.haxby@oracle.com, Juerg Haefliger , dwmw@amazon.co.uk, kirill.shutemov@linux.intel.com MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Juerg Haefliger If the page is unmapped by XPFO, a data cache flush results in a fatal page fault, so let's temporarily map the region, flush the cache, and then unmap it. v6: actually flush in the face of xpfo, and temporarily map the underlying memory so it can be flushed correctly CC: linux-arm-kernel@lists.infradead.org Signed-off-by: Juerg Haefliger Signed-off-by: Tycho Andersen Signed-off-by: Khalid Aziz --- arch/arm64/mm/flush.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/arch/arm64/mm/flush.c b/arch/arm64/mm/flush.c index 30695a868107..f12f26b60319 100644 --- a/arch/arm64/mm/flush.c +++ b/arch/arm64/mm/flush.c @@ -20,6 +20,7 @@ #include #include #include +#include #include #include @@ -28,9 +29,15 @@ void sync_icache_aliases(void *kaddr, unsigned long len) { unsigned long addr = (unsigned long)kaddr; + unsigned long num_pages = XPFO_NUM_PAGES(addr, len); + void *mapping[num_pages]; if (icache_is_aliasing()) { + xpfo_temp_map(kaddr, len, mapping, + sizeof(mapping[0]) * num_pages); __clean_dcache_area_pou(kaddr, len); + xpfo_temp_unmap(kaddr, len, mapping, + sizeof(mapping[0]) * num_pages); __flush_icache_all(); } else { flush_icache_range(addr, addr + len); -- 2.17.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel