From patchwork Tue May 14 12:24:51 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Julien Grall X-Patchwork-Id: 10942895 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id D632E112C for ; Tue, 14 May 2019 12:26:14 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id C73F9286A1 for ; Tue, 14 May 2019 12:26:14 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id B9500286A7; Tue, 14 May 2019 12:26:14 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 6D49A286A1 for ; Tue, 14 May 2019 12:26:14 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1hQWUn-0002rr-K3; Tue, 14 May 2019 12:25:25 +0000 Received: from us1-rack-dfw2.inumbo.com ([104.130.134.6]) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1hQWUm-0002pk-9m for xen-devel@lists.xenproject.org; Tue, 14 May 2019 12:25:24 +0000 X-Inumbo-ID: 589e5fd1-7643-11e9-8980-bc764e045a96 Received: from foss.arm.com (unknown [217.140.101.70]) by us1-rack-dfw2.inumbo.com (Halon) with ESMTP id 589e5fd1-7643-11e9-8980-bc764e045a96; Tue, 14 May 2019 12:25:23 +0000 (UTC) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 3897A15AD; Tue, 14 May 2019 05:25:23 -0700 (PDT) Received: from e108454-lin.cambridge.arm.com (e108454-lin.cambridge.arm.com [10.1.196.50]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 057143F71E; Tue, 14 May 2019 05:25:21 -0700 (PDT) From: Julien Grall To: xen-devel@lists.xenproject.org Date: Tue, 14 May 2019 13:24:51 +0100 Message-Id: <20190514122456.28559-15-julien.grall@arm.com> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20190514122456.28559-1-julien.grall@arm.com> References: <20190514122456.28559-1-julien.grall@arm.com> Subject: [Xen-devel] [PATCH MM-PART2 RESEND v2 14/19] xen/arm32: mm: Avoid cleaning the cache for secondary CPUs page-tables X-BeenThere: xen-devel@lists.xenproject.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Cc: Oleksandr_Tyshchenko@epam.com, Julien Grall , Stefano Stabellini , Andrii Anisov MIME-Version: 1.0 Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" X-Virus-Scanned: ClamAV using ClamSMTP The page-table walker is configured to use the same shareability and cacheability as the access performed when updating the page-tables. This means cleaning the cache for secondary CPUs runtime page-tables is unnecessary. Signed-off-by: Julien Grall Reviewed-by: Andrii Anisov --- Changes in v2: - Add Andrii's reviewed-by --- xen/arch/arm/mm.c | 3 --- 1 file changed, 3 deletions(-) diff --git a/xen/arch/arm/mm.c b/xen/arch/arm/mm.c index cda2847d00..6db7dda0da 100644 --- a/xen/arch/arm/mm.c +++ b/xen/arch/arm/mm.c @@ -769,9 +769,6 @@ int init_secondary_pagetables(int cpu) write_pte(&first[first_table_offset(DOMHEAP_VIRT_START+i*FIRST_SIZE)], pte); } - clean_dcache_va_range(first, PAGE_SIZE); - clean_dcache_va_range(domheap, DOMHEAP_SECOND_PAGES*PAGE_SIZE); - per_cpu(xen_pgtable, cpu) = first; per_cpu(xen_dommap, cpu) = domheap;