From patchwork Thu Mar 1 02:40:57 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wen Congyang X-Patchwork-Id: 143875 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id 03B4FB6EF3 for ; Thu, 1 Mar 2012 13:39:57 +1100 (EST) Received: from localhost ([::1]:38335 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1S2vvv-0006in-Li for incoming@patchwork.ozlabs.org; Wed, 29 Feb 2012 21:39:55 -0500 Received: from eggs.gnu.org ([208.118.235.92]:43015) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1S2vvn-0006iU-8d for qemu-devel@nongnu.org; Wed, 29 Feb 2012 21:39:49 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1S2vvl-0002D2-Ex for qemu-devel@nongnu.org; Wed, 29 Feb 2012 21:39:46 -0500 Received: from [222.73.24.84] (port=59632 helo=song.cn.fujitsu.com) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1S2vvl-0002Ce-2z for qemu-devel@nongnu.org; Wed, 29 Feb 2012 21:39:45 -0500 Received: from tang.cn.fujitsu.com (tang.cn.fujitsu.com [10.167.250.3]) by song.cn.fujitsu.com (Postfix) with ESMTP id 4A59517003F; Thu, 1 Mar 2012 10:39:42 +0800 (CST) Received: from mailserver.fnst.cn.fujitsu.com (tang.cn.fujitsu.com [127.0.0.1]) by tang.cn.fujitsu.com (8.14.3/8.13.1) with ESMTP id q212deNE007413; Thu, 1 Mar 2012 10:39:40 +0800 Received: from [10.167.225.226] ([10.167.225.226]) by mailserver.fnst.cn.fujitsu.com (Lotus Domino Release 8.5.1FP4) with ESMTP id 2012030110375187-829461 ; Thu, 1 Mar 2012 10:37:51 +0800 Message-ID: <4F4EE1B9.1080803@cn.fujitsu.com> Date: Thu, 01 Mar 2012 10:40:57 +0800 From: Wen Congyang User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.9) Gecko/20100413 Fedora/3.0.4-2.fc13 Thunderbird/3.0.4 MIME-Version: 1.0 To: qemu-devel , Jan Kiszka , Dave Anderson , HATAYAMA Daisuke , Luiz Capitulino , Eric Blake References: <4F4EE080.9060307@cn.fujitsu.com> In-Reply-To: <4F4EE080.9060307@cn.fujitsu.com> X-MIMETrack: Itemize by SMTP Server on mailserver/fnst(Release 8.5.1FP4|July 25, 2010) at 2012-03-01 10:37:51, Serialize by Router on mailserver/fnst(Release 8.5.1FP4|July 25, 2010) at 2012-03-01 10:37:52, Serialize complete at 2012-03-01 10:37:52 X-detected-operating-system: by eggs.gnu.org: FreeBSD 6.x (1) X-Received-From: 222.73.24.84 Subject: [Qemu-devel] [RFC][PATCH 02/14 v7] Add API to check whether a physical address is I/O address X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org This API will be used in the following patch. Signed-off-by: Wen Congyang --- cpu-common.h | 2 ++ exec.c | 11 +++++++++++ 2 files changed, 13 insertions(+), 0 deletions(-) diff --git a/cpu-common.h b/cpu-common.h index a40c57d..fde3e5d 100644 --- a/cpu-common.h +++ b/cpu-common.h @@ -71,6 +71,8 @@ void cpu_physical_memory_unmap(void *buffer, target_phys_addr_t len, void *cpu_register_map_client(void *opaque, void (*callback)(void *opaque)); void cpu_unregister_map_client(void *cookie); +bool cpu_physical_memory_is_io(target_phys_addr_t phys_addr); + /* Coalesced MMIO regions are areas where write operations can be reordered. * This usually implies that write operations are side-effect free. This allows * batching which can make a major impact on performance when using diff --git a/exec.c b/exec.c index b81677a..2114dd5 100644 --- a/exec.c +++ b/exec.c @@ -4435,3 +4435,14 @@ bool virtio_is_big_endian(void) #undef env #endif + +bool cpu_physical_memory_is_io(target_phys_addr_t phys_addr) +{ + ram_addr_t pd; + PhysPageDesc p; + + p = phys_page_find(phys_addr >> TARGET_PAGE_BITS); + pd = p.phys_offset; + + return !is_ram_rom_romd(pd); +}