From patchwork Fri Jun 21 23:56:06 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stefano Stabellini X-Patchwork-Id: 11010853 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 BD5C076 for ; Fri, 21 Jun 2019 23:57:40 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id AE91A2870D for ; Fri, 21 Jun 2019 23:57:40 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id A2E8D28BAD; Fri, 21 Jun 2019 23:57:40 +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=-5.0 required=2.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,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 41AA62870D for ; Fri, 21 Jun 2019 23:57:40 +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 1heTOA-0004XO-JM; Fri, 21 Jun 2019 23:56:14 +0000 Received: from all-amaz-eas1.inumbo.com ([34.197.232.57] helo=us1-amaz-eas2.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1heTO8-0004VI-Ff for xen-devel@lists.xenproject.org; Fri, 21 Jun 2019 23:56:12 +0000 X-Inumbo-ID: 252ef43a-9480-11e9-8a87-cb80762533cf Received: from mail.kernel.org (unknown [198.145.29.99]) by us1-amaz-eas2.inumbo.com (Halon) with ESMTPS id 252ef43a-9480-11e9-8a87-cb80762533cf; Fri, 21 Jun 2019 23:56:11 +0000 (UTC) Received: from sstabellini-ThinkPad-T480s.xilinx.com (c-67-164-102-47.hsd1.ca.comcast.net [67.164.102.47]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id C19A821530; Fri, 21 Jun 2019 23:56:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1561161371; bh=xd6isYPxj9hWpPMW0MEOb61upETwKMmHwAnuRy4ymKM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=eXtwr+/C11Vjc0WAUnRweNCdcdrIhZqw5gzocJaWuTT9pjpsV30sVs2YTJ6eOM/Df zw5oKLWyW34Bwgyx660MY4fNlRXTapbJLa0spqszqrQJoGcwusZ1mAprGAyYaPm7E+ Yfbc672L8KrksFVn3fvKmcv3rEz9Qd6vW3bUAf1w= From: Stefano Stabellini To: xen-devel@lists.xenproject.org Date: Fri, 21 Jun 2019 16:56:06 -0700 Message-Id: <20190621235608.2153-4-sstabellini@kernel.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: References: Subject: [Xen-devel] [PATCH v3 4/6] xen/arm: handle reserved-memory in consider_modules and dt_unreserved_regions 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: Stefano Stabellini , julien.grall@arm.com, sstabellini@kernel.org MIME-Version: 1.0 Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" X-Virus-Scanned: ClamAV using ClamSMTP reserved-memory regions overlap with memory nodes. The overlapping memory is reserved-memory and should be handled accordingly: consider_modules and dt_unreserved_regions should skip these regions the same way they are already skipping mem-reserve regions. Signed-off-by: Stefano Stabellini Acked-by: Julien Grall --- Changes in v3: - coding style - in-code comments Changes in v2: - fix commit message: full overlap - remove check_reserved_memory - extend consider_modules and dt_unreserved_regions --- xen/arch/arm/setup.c | 53 +++++++++++++++++++++++++++++++++++++++++--- 1 file changed, 50 insertions(+), 3 deletions(-) diff --git a/xen/arch/arm/setup.c b/xen/arch/arm/setup.c index 215746a5c3..d9cfb1aa2f 100644 --- a/xen/arch/arm/setup.c +++ b/xen/arch/arm/setup.c @@ -206,6 +206,28 @@ void __init dt_unreserved_regions(paddr_t s, paddr_t e, } } + /* + * i is the current bootmodule we are evaluating across all possible + * kinds. + * + * When retrieving the corresponding reserved-memory addresses + * below, we need to index the bootinfo.reserved_mem bank starting + * from 0, and only counting the reserved-memory modules. Hence, + * we need to use i - nr. + */ + for ( ; i - nr < bootinfo.reserved_mem.nr_banks; i++ ) + { + paddr_t r_s = bootinfo.reserved_mem.bank[i - nr].start; + paddr_t r_e = r_s + bootinfo.reserved_mem.bank[i - nr].size; + + if ( s < r_e && r_s < e ) + { + dt_unreserved_regions(r_e, e, cb, i+1); + dt_unreserved_regions(s, r_s, cb, i+1); + return; + } + } + cb(s, e); } @@ -392,7 +414,7 @@ static paddr_t __init consider_modules(paddr_t s, paddr_t e, { const struct bootmodules *mi = &bootinfo.modules; int i; - int nr_rsvd; + int nr; s = (s+align-1) & ~(align-1); e = e & ~(align-1); @@ -418,9 +440,9 @@ static paddr_t __init consider_modules(paddr_t s, paddr_t e, /* Now check any fdt reserved areas. */ - nr_rsvd = fdt_num_mem_rsv(device_tree_flattened); + nr = fdt_num_mem_rsv(device_tree_flattened); - for ( ; i < mi->nr_mods + nr_rsvd; i++ ) + for ( ; i < mi->nr_mods + nr; i++ ) { paddr_t mod_s, mod_e; @@ -442,6 +464,31 @@ static paddr_t __init consider_modules(paddr_t s, paddr_t e, return consider_modules(s, mod_s, size, align, i+1); } } + + /* + * i is the current bootmodule we are evaluating, across all + * possible kinds of bootmodules. + * + * When retrieving the corresponding reserved-memory addresses, we + * need to index the bootinfo.reserved_mem bank starting from 0, and + * only counting the reserved-memory modules. Hence, we need to use + * i - nr. + */ + nr += mi->nr_mods; + for ( ; i - nr < bootinfo.reserved_mem.nr_banks; i++ ) + { + paddr_t r_s = bootinfo.reserved_mem.bank[i - nr].start; + paddr_t r_e = r_s + bootinfo.reserved_mem.bank[i - nr].size; + + if ( s < r_e && r_s < e ) + { + r_e = consider_modules(r_e, e, size, align, i + 1); + if ( r_e ) + return r_e; + + return consider_modules(s, r_s, size, align, i + 1); + } + } return e; } #endif