From patchwork Mon May 7 04:06:40 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wen Congyang X-Patchwork-Id: 157214 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 6095AB6EE6 for ; Mon, 7 May 2012 14:03:42 +1000 (EST) Received: from localhost ([::1]:47651 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1SRFAi-0000cz-7y for incoming@patchwork.ozlabs.org; Mon, 07 May 2012 00:03:40 -0400 Received: from eggs.gnu.org ([208.118.235.92]:40226) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1SRFAZ-0000ch-Hv for qemu-devel@nongnu.org; Mon, 07 May 2012 00:03:33 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1SRFAX-0007Ru-O0 for qemu-devel@nongnu.org; Mon, 07 May 2012 00:03:31 -0400 Received: from [222.73.24.84] (port=38511 helo=song.cn.fujitsu.com) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1SRFAX-0007Rf-Bo for qemu-devel@nongnu.org; Mon, 07 May 2012 00:03:29 -0400 X-IronPort-AV: E=Sophos;i="4.75,540,1330876800"; d="scan'208";a="4897146" Received: from unknown (HELO tang.cn.fujitsu.com) ([10.167.250.3]) by song.cn.fujitsu.com with ESMTP; 07 May 2012 12:03:00 +0800 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 q4743OTD015492; Mon, 7 May 2012 12:03:25 +0800 Received: from [10.167.225.226] ([10.167.225.226]) by mailserver.fnst.cn.fujitsu.com (Lotus Domino Release 8.5.3) with ESMTP id 2012050712024003-298464 ; Mon, 7 May 2012 12:02:40 +0800 Message-ID: <4FA74A50.5090309@cn.fujitsu.com> Date: Mon, 07 May 2012 12:06:40 +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 , HATAYAMA Daisuke , Luiz Capitulino , "Daniel P. Berrange" , Anthony Liguori References: <4FA74927.5070905@cn.fujitsu.com> In-Reply-To: <4FA74927.5070905@cn.fujitsu.com> X-MIMETrack: Itemize by SMTP Server on mailserver/fnst(Release 8.5.3|September 15, 2011) at 2012/05/07 12:02:40, Serialize by Router on mailserver/fnst(Release 8.5.3|September 15, 2011) at 2012/05/07 12:02:42, Serialize complete at 2012/05/07 12:02:42 X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 222.73.24.84 Subject: [Qemu-devel] [PATCH 05/12 v15] Add API to get memory mapping 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 Add API to get all virtual address and physical address mapping. If the guest doesn't use paging, the virtual address is equal to the phyical address. The virtual address and physical address mapping is for gdb's user, and it does not include the memory that is not referenced by the page table. So if you want to use crash to anaylze the vmcore, please do not specify -p option. the reason why the -p option is not default explicitly: guest machine in a catastrophic state can have corrupted memory, which we cannot trust. Signed-off-by: Wen Congyang --- memory_mapping.c | 47 +++++++++++++++++++++++++++++++++++++++++++++++ memory_mapping.h | 15 +++++++++++++++ 2 files changed, 62 insertions(+), 0 deletions(-) diff --git a/memory_mapping.c b/memory_mapping.c index 718f271..627397a 100644 --- a/memory_mapping.c +++ b/memory_mapping.c @@ -164,3 +164,50 @@ void memory_mapping_list_init(MemoryMappingList *list) list->last_mapping = NULL; QTAILQ_INIT(&list->head); } + +#if defined(CONFIG_HAVE_GET_MEMORY_MAPPING) + +static CPUArchState *find_paging_enabled_cpu(CPUArchState *start_cpu) +{ + CPUArchState *env; + + for (env = start_cpu; env != NULL; env = env->next_cpu) { + if (cpu_paging_enabled(env)) { + return env; + } + } + + return NULL; +} + +int qemu_get_guest_memory_mapping(MemoryMappingList *list) +{ + CPUArchState *env, *first_paging_enabled_cpu; + RAMBlock *block; + ram_addr_t offset, length; + int ret; + + first_paging_enabled_cpu = find_paging_enabled_cpu(first_cpu); + if (first_paging_enabled_cpu) { + for (env = first_paging_enabled_cpu; env != NULL; env = env->next_cpu) { + ret = cpu_get_memory_mapping(list, env); + if (ret < 0) { + return -1; + } + } + return 0; + } + + /* + * If the guest doesn't use paging, the virtual address is equal to physical + * address. + */ + QLIST_FOREACH(block, &ram_list.blocks, next) { + offset = block->offset; + length = block->length; + create_new_memory_mapping(list, offset, offset, length); + } + + return 0; +} +#endif diff --git a/memory_mapping.h b/memory_mapping.h index e486d10..7f3c256 100644 --- a/memory_mapping.h +++ b/memory_mapping.h @@ -45,6 +45,21 @@ void memory_mapping_list_free(MemoryMappingList *list); void memory_mapping_list_init(MemoryMappingList *list); +/* + * Return value: + * 0: success + * -1: failed + * -2: unsupported + */ +#if defined(CONFIG_HAVE_GET_MEMORY_MAPPING) +int qemu_get_guest_memory_mapping(MemoryMappingList *list); +#else +static inline int qemu_get_guest_memory_mapping(MemoryMappingList *list) +{ + return -2; +} +#endif + #else /* We use MemoryMappingList* in cpu-all.h */