From patchwork Tue May 17 09:05:27 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Penny Zheng X-Patchwork-Id: 12852180 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 47B70C433FE for ; Tue, 17 May 2022 09:12:26 +0000 (UTC) Received: from list by lists.xenproject.org with outflank-mailman.330662.554074 (Exim 4.92) (envelope-from ) id 1nqtFT-0002oW-0Q; Tue, 17 May 2022 09:12:11 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 330662.554074; Tue, 17 May 2022 09:12:10 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1nqtFS-0002oP-Tz; Tue, 17 May 2022 09:12:10 +0000 Received: by outflank-mailman (input) for mailman id 330662; Tue, 17 May 2022 09:12:08 +0000 Received: from se1-gles-sth1-in.inumbo.com ([159.253.27.254] helo=se1-gles-sth1.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1nqt9t-0006FZ-1N for xen-devel@lists.xenproject.org; Tue, 17 May 2022 09:06:25 +0000 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by se1-gles-sth1.inumbo.com (Halon) with ESMTP id 9fbd5e63-d5c0-11ec-bd2c-47488cf2e6aa; Tue, 17 May 2022 11:06:23 +0200 (CEST) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 74FB31063; Tue, 17 May 2022 02:06:23 -0700 (PDT) Received: from a011292.shanghai.arm.com (a011292.shanghai.arm.com [10.169.190.94]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id C41173F73D; Tue, 17 May 2022 02:06:20 -0700 (PDT) X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" X-Inumbo-ID: 9fbd5e63-d5c0-11ec-bd2c-47488cf2e6aa From: Penny Zheng To: xen-devel@lists.xenproject.org Cc: wei.chen@arm.com, Penny Zheng , Stefano Stabellini , Julien Grall , Bertrand Marquis , Volodymyr Babchuk , Penny Zheng Subject: [PATCH v4 6/8] xen/arm: set up shared memory foreign mapping for borrower domain Date: Tue, 17 May 2022 17:05:27 +0800 Message-Id: <20220517090529.3140417-7-Penny.Zheng@arm.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220517090529.3140417-1-Penny.Zheng@arm.com> References: <20220517090529.3140417-1-Penny.Zheng@arm.com> MIME-Version: 1.0 This commit sets up shared memory foreign mapping for borrower domain. If owner domain is the default dom_io, all shared domain are treated as borrower domain. Signed-off-by: Penny Zheng Reviewed-by: Stefano Stabellini --- v4 changes: - no change --- v3 change: - use map_regions_p2mt instead --- v2 change: - remove guest_physmap_add_shm, since for borrower domain, we only do P2M foreign memory mapping now. --- xen/arch/arm/domain_build.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/xen/arch/arm/domain_build.c b/xen/arch/arm/domain_build.c index 3a20247836..fcdd87468d 100644 --- a/xen/arch/arm/domain_build.c +++ b/xen/arch/arm/domain_build.c @@ -957,6 +957,15 @@ static int __init process_shm(struct domain *d, if ( ret ) return ret; } + + if ( owner_dom_io || (strcmp(role_str, "borrower") == 0) ) + { + /* Set up P2M foreign mapping for borrower domain. */ + ret = map_regions_p2mt(d, _gfn(PFN_UP(gbase)), PFN_DOWN(psize), + _mfn(PFN_UP(pbase)), p2m_map_foreign_rw); + if ( ret ) + return ret; + } } return 0;