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=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,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 16226C2D0C3 for ; Mon, 16 Dec 2019 18:04:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D9E3F20726 for ; Mon, 16 Dec 2019 18:04:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1576519496; bh=Z8anMrWmTZjHIUgn0N7JaWIaabcZ42ch5MZ7XopHJD4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=z5lveEK7emfQjVZTyOLwT4IqpsSgEwUw/cY2hlOBC81kqVfCWMmGN0Y0aFwiLnAmg EvgHgc7iyNnKwVVJseU42W0mHKQNEvfa7ObvlcjpdD5DJEf/cpDR/Cv226GWA8nM8+ lpOPsxWKWzO73/KjfGfsePXRNeOa1VJGw+X50t4I= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729742AbfLPSEy (ORCPT ); Mon, 16 Dec 2019 13:04:54 -0500 Received: from mail.kernel.org ([198.145.29.99]:42410 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729727AbfLPSEu (ORCPT ); Mon, 16 Dec 2019 13:04:50 -0500 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 7399A20726; Mon, 16 Dec 2019 18:04:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1576519489; bh=Z8anMrWmTZjHIUgn0N7JaWIaabcZ42ch5MZ7XopHJD4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=xQm4ijOTlAR+mOxQvuoVYB1uxCPDkucE2NGv9ybL9YF5T+fOBYWvrlCDt4K6dxT3E 2/R93JYFnp2HCwC1w3hATc5AcNeUFWVgOIUHwl/U62E+XTd02a8q98OtrM1mj1s+3y x8Ajh53edFsx83JjgakS9A9VbvteXBJ5fBMQE1wM= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Alastair DSilva , Michael Ellerman Subject: [PATCH 4.19 086/140] powerpc: Allow 64bit VDSO __kernel_sync_dicache to work across ranges >4GB Date: Mon, 16 Dec 2019 18:49:14 +0100 Message-Id: <20191216174810.645222091@linuxfoundation.org> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20191216174747.111154704@linuxfoundation.org> References: <20191216174747.111154704@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: Alastair D'Silva commit f9ec11165301982585e5e5f606739b5bae5331f3 upstream. When calling __kernel_sync_dicache with a size >4GB, we were masking off the upper 32 bits, so we would incorrectly flush a range smaller than intended. This patch replaces the 32 bit shifts with 64 bit ones, so that the full size is accounted for. Signed-off-by: Alastair D'Silva Cc: stable@vger.kernel.org Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20191104023305.9581-3-alastair@au1.ibm.com Signed-off-by: Greg Kroah-Hartman --- arch/powerpc/kernel/vdso64/cacheflush.S | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/arch/powerpc/kernel/vdso64/cacheflush.S +++ b/arch/powerpc/kernel/vdso64/cacheflush.S @@ -39,7 +39,7 @@ V_FUNCTION_BEGIN(__kernel_sync_dicache) subf r8,r6,r4 /* compute length */ add r8,r8,r5 /* ensure we get enough */ lwz r9,CFG_DCACHE_LOGBLOCKSZ(r10) - srw. r8,r8,r9 /* compute line count */ + srd. r8,r8,r9 /* compute line count */ crclr cr0*4+so beqlr /* nothing to do? */ mtctr r8 @@ -56,7 +56,7 @@ V_FUNCTION_BEGIN(__kernel_sync_dicache) subf r8,r6,r4 /* compute length */ add r8,r8,r5 lwz r9,CFG_ICACHE_LOGBLOCKSZ(r10) - srw. r8,r8,r9 /* compute line count */ + srd. r8,r8,r9 /* compute line count */ crclr cr0*4+so beqlr /* nothing to do? */ mtctr r8