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 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 9CEE6C4708D for ; Mon, 12 Dec 2022 10:17:50 +0000 (UTC) Received: from list by lists.xenproject.org with outflank-mailman.459399.717165 (Exim 4.92) (envelope-from ) id 1p4fsT-0007M3-Jy; Mon, 12 Dec 2022 10:17:41 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 459399.717165; Mon, 12 Dec 2022 10:17:41 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1p4fsT-0007IY-4v; Mon, 12 Dec 2022 10:17:41 +0000 Received: by outflank-mailman (input) for mailman id 459399; Mon, 12 Dec 2022 10:17:37 +0000 Received: from mail.xenproject.org ([104.130.215.37]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1p4fsP-0006gK-UC for xen-devel@lists.xenproject.org; Mon, 12 Dec 2022 10:17:37 +0000 Received: from xenbits.xenproject.org ([104.239.192.120]) by mail.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1p4fsP-0002CV-KU; Mon, 12 Dec 2022 10:17:37 +0000 Received: from 54-240-197-224.amazon.com ([54.240.197.224] helo=dev-dsk-jgrall-1b-035652ec.eu-west-1.amazon.com) by xenbits.xenproject.org with esmtpsa (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.92) (envelope-from ) id 1p4fXB-0001lz-MG; Mon, 12 Dec 2022 09:55:41 +0000 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" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=xen.org; s=20200302mail; h=Content-Transfer-Encoding:MIME-Version:References: In-Reply-To:Message-Id:Date:Subject:Cc:To:From; bh=iH0hivAOAHYKAAK+viCKrsGKgjbCA1MMf5n4IXDupUY=; b=iuJyNgimqXnNLncs9wZGnNFTrB iXD8RUcjTvxR/neHJ3KFjbpgQFVQ3Hc227MMrLAJd89S/8qc0iMwEOapQWbnsZcn6Oy50skK5Q3Zd eCdiOUH4KB585H5YLHzbIEJmJ6uPsIowoYqKIxB7nCxTC9gQthJED+YOhFgaobPMNDxw=; From: Julien Grall To: xen-devel@lists.xenproject.org Cc: michal.orzel@amd.com, Luca.Fancellu@arm.com, Julien Grall , Stefano Stabellini , Julien Grall , Bertrand Marquis , Volodymyr Babchuk Subject: [PATCH v3 13/18] xen/arm: mm: Allow xen_pt_update() to work with the current root table Date: Mon, 12 Dec 2022 09:55:18 +0000 Message-Id: <20221212095523.52683-14-julien@xen.org> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221212095523.52683-1-julien@xen.org> References: <20221212095523.52683-1-julien@xen.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Julien Grall At the moment, xen_pt_update() will only work on the runtime page tables. In follow-up patches, we will also want to use the helper to update the boot page tables. All the existing callers of xen_pt_update() expects to modify the current page-tables. Therefore, we can read the root physical address directly from TTBR0_EL2. Signed-off-by: Julien Grall --- Changes in v2: - Patch added --- xen/arch/arm/mm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/xen/arch/arm/mm.c b/xen/arch/arm/mm.c index cc11f5c639e6..26d6b70410c5 100644 --- a/xen/arch/arm/mm.c +++ b/xen/arch/arm/mm.c @@ -1114,7 +1114,7 @@ static int xen_pt_update(unsigned long virt, * * XXX: Add a check. */ - const mfn_t root = virt_to_mfn(THIS_CPU_PGTABLE); + const mfn_t root = maddr_to_mfn(READ_SYSREG64(TTBR0_EL2)); /* * The hardware was configured to forbid mapping both writeable and -- 2.38.1