From nobody Sun Feb 8 21:33:33 2026 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 150360299063787.0505862594323; Thu, 24 Aug 2017 12:29:50 -0700 (PDT) Received: from localhost ([::1]:50112 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dkxp7-0003BG-Dt for importer@patchew.org; Thu, 24 Aug 2017 15:29:49 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:52084) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dkxnQ-0001uN-7M for qemu-devel@nongnu.org; Thu, 24 Aug 2017 15:28:05 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dkxnN-0004IB-2i for qemu-devel@nongnu.org; Thu, 24 Aug 2017 15:28:04 -0400 Received: from mx1.redhat.com ([209.132.183.28]:45480) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1dkxnM-0004GU-Sz for qemu-devel@nongnu.org; Thu, 24 Aug 2017 15:28:01 -0400 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id D9FCAC04B941; Thu, 24 Aug 2017 19:27:59 +0000 (UTC) Received: from dgilbert-t530.redhat.com (ovpn-117-165.ams2.redhat.com [10.36.117.165]) by smtp.corp.redhat.com (Postfix) with ESMTP id 9F1A57F8C3; Thu, 24 Aug 2017 19:27:49 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com D9FCAC04B941 Authentication-Results: ext-mx07.extmail.prod.ext.phx2.redhat.com; dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx07.extmail.prod.ext.phx2.redhat.com; spf=fail smtp.mailfrom=dgilbert@redhat.com From: "Dr. David Alan Gilbert (git)" To: qemu-devel@nongnu.org, maxime.coquelin@redhat.com, a.perevalov@samsung.com, mst@redhat.com, marcandre.lureau@redhat.com Date: Thu, 24 Aug 2017 20:27:02 +0100 Message-Id: <20170824192730.8440-5-dgilbert@redhat.com> In-Reply-To: <20170824192730.8440-1-dgilbert@redhat.com> References: <20170824192730.8440-1-dgilbert@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.31]); Thu, 24 Aug 2017 19:28:00 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [RFC v2 04/32] qemu_ram_block_host_offset X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: lvivier@redhat.com, aarcange@redhat.com, felipe@nutanix.com, peterx@redhat.com, quintela@redhat.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" From: "Dr. David Alan Gilbert" Utility to give the offset of a host pointer within a RAMBlock (assuming we already know it's in that RAMBlock) Signed-off-by: Dr. David Alan Gilbert Reviewed-by: Peter Xu --- exec.c | 10 ++++++++++ include/exec/cpu-common.h | 1 + 2 files changed, 11 insertions(+) diff --git a/exec.c b/exec.c index 67df2909ce..35b4cea2ed 100644 --- a/exec.c +++ b/exec.c @@ -2231,6 +2231,16 @@ static void *qemu_ram_ptr_length(RAMBlock *ram_block= , ram_addr_t addr, return ramblock_ptr(block, addr); } =20 +/* Return the offset of a hostpointer within a ramblock */ +ram_addr_t qemu_ram_block_host_offset(RAMBlock *rb, void *host) +{ + ram_addr_t res =3D (uint8_t *)host - (uint8_t *)rb->host; + assert((uint8_t *)host >=3D (uint8_t *)rb->host); + assert(res < rb->max_length); + + return res; +} + /* * Translates a host ptr back to a RAMBlock, a ram_addr and an offset * in that RAMBlock. diff --git a/include/exec/cpu-common.h b/include/exec/cpu-common.h index 74341b19d2..0d861a6289 100644 --- a/include/exec/cpu-common.h +++ b/include/exec/cpu-common.h @@ -68,6 +68,7 @@ ram_addr_t qemu_ram_addr_from_host(void *ptr); RAMBlock *qemu_ram_block_by_name(const char *name); RAMBlock *qemu_ram_block_from_host(void *ptr, bool round_offset, ram_addr_t *offset); +ram_addr_t qemu_ram_block_host_offset(RAMBlock *rb, void *host); void qemu_ram_set_idstr(RAMBlock *block, const char *name, DeviceState *de= v); void qemu_ram_unset_idstr(RAMBlock *block); const char *qemu_ram_get_idstr(RAMBlock *rb); --=20 2.13.5