From patchwork Thu Mar 7 07:21:37 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Elena Ufimtseva X-Patchwork-Id: 10842287 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id EA48B1515 for ; Thu, 7 Mar 2019 07:32:04 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id D3AE82E2D3 for ; Thu, 7 Mar 2019 07:32:04 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id C7C752E3A6; Thu, 7 Mar 2019 07:32:04 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.7 required=2.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,MAILING_LIST_MULTI,UNPARSEABLE_RELAY autolearn=ham version=3.3.1 Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 303A62E2D3 for ; Thu, 7 Mar 2019 07:32:04 +0000 (UTC) Received: from localhost ([127.0.0.1]:46704 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1h1nVb-0002En-9b for patchwork-qemu-devel@patchwork.kernel.org; Thu, 07 Mar 2019 02:32:03 -0500 Received: from eggs.gnu.org ([209.51.188.92]:59765) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1h1nLm-00026R-AM for qemu-devel@nongnu.org; Thu, 07 Mar 2019 02:21:55 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1h1nLl-000514-8q for qemu-devel@nongnu.org; Thu, 07 Mar 2019 02:21:54 -0500 Received: from userp2120.oracle.com ([156.151.31.85]:55424) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1h1nLk-000501-V6 for qemu-devel@nongnu.org; Thu, 07 Mar 2019 02:21:53 -0500 Received: from pps.filterd (userp2120.oracle.com [127.0.0.1]) by userp2120.oracle.com (8.16.0.27/8.16.0.27) with SMTP id x277JUb0037979; Thu, 7 Mar 2019 07:21:50 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=from : to : cc : subject : date : message-id; s=corp-2018-07-02; bh=zxtJcc2/d6aPj6fVKyjkBz213OIhe1WHAYYKyRh8pNw=; b=RmJLAOYzNKz+7jwOmse245UbYvyqExZBv5C3SpHB3uB/yTBrimazYNqemGhwtXD4kNir LW5ttRRoyn4+srOdgq3ni6u8Udm5rX9PPuBy6K9Cf4wDAG5Jl6zQboguMqdf9ETPLIkS fhl7h11lmxDmHCn1yQchULapFGbme+b7VRsJc1rry6GexxOalIWOsGhn4YVQAbtdaBjO fkJZL8AxbHOHfIF24/4ENwKpNY82VLaw00/CgtDiFfl5PaD7NtrF+lQligyUyYcYYVWF ZC87EacJAGpUJd1xvbcFMobEH6+D2s7iu5TlWjIMri9+EKDQ137i/AmUIOeLyYRRxTTO Ow== Received: from userv0022.oracle.com (userv0022.oracle.com [156.151.31.74]) by userp2120.oracle.com with ESMTP id 2qyjfrr5c7-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 07 Mar 2019 07:21:50 +0000 Received: from userv0121.oracle.com (userv0121.oracle.com [156.151.31.72]) by userv0022.oracle.com (8.14.4/8.14.4) with ESMTP id x277LiOE031667 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 7 Mar 2019 07:21:44 GMT Received: from abhmp0016.oracle.com (abhmp0016.oracle.com [141.146.116.22]) by userv0121.oracle.com (8.14.4/8.13.8) with ESMTP id x277Li1j011360; Thu, 7 Mar 2019 07:21:44 GMT Received: from heatpipe.hsd1.ca.comcast.net (/73.170.27.202) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Wed, 06 Mar 2019 23:21:44 -0800 From: elena.ufimtseva@oracle.com To: qemu-devel@nongnu.org Date: Wed, 6 Mar 2019 23:21:37 -0800 Message-Id: <20190307072137.8735-1-elena.ufimtseva@oracle.com> X-Mailer: git-send-email 2.17.1 X-Proofpoint-Virus-Version: vendor=nai engine=5900 definitions=9187 signatures=668685 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 priorityscore=1501 malwarescore=0 suspectscore=1 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1903070053 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [generic] X-Received-From: 156.151.31.85 Subject: [Qemu-devel] [multiprocess RFC PATCH 14/37] multi-process: PCI BAR write handling for proxy & remote endpoints 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: elena.ufimtseva@oracle.com, john.g.johnson@oracle.com, sstabellini@kernel.org, jag.raman@oracle.com, konrad.wilk@oracle.com, ross.lagerwall@citrix.com, liran.alon@oracle.com, stefanha@redhat.com, kanth.ghatraju@oracle.com Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP From: Jagannathan Raman Proxy device object implements handler for PCI BAR writes. The handler sends BAR_WRITE message to the remote process with the BAR address and value to be written The remote process implements handler for BAR_WRITE message. Signed-off-by: Jagannathan Raman Signed-off-by: Elena Ufimtseva Signed-off-by: John G Johnson --- hw/proxy/qemu-proxy.c | 28 ++++++++++++++++++++++++++++ include/hw/proxy/qemu-proxy.h | 3 +++ include/io/proxy-link.h | 10 ++++++++++ remote/remote-main.c | 24 ++++++++++++++++++++++++ 4 files changed, 65 insertions(+) diff --git a/hw/proxy/qemu-proxy.c b/hw/proxy/qemu-proxy.c index 91cc82b..49ed683 100644 --- a/hw/proxy/qemu-proxy.c +++ b/hw/proxy/qemu-proxy.c @@ -201,3 +201,31 @@ static void pci_proxy_dev_realize(PCIDevice *device, Error **errp) } } } + +static void send_bar_access_msg(ProxyLinkState *proxy_link, MemoryRegion *mr, + bool write, hwaddr addr, uint64_t *val, + unsigned size, bool memory) +{ + ProcMsg msg; + + memset(&msg, 0, sizeof(ProcMsg)); + + msg.bytestream = 0; + msg.size = sizeof(msg.data1); + msg.data1.bar_access.addr = mr->addr + addr; + msg.data1.bar_access.size = size; + msg.data1.bar_access.memory = memory; + + if (write) { + msg.cmd = BAR_WRITE; + msg.data1.bar_access.val = *val; + } + + proxy_proc_send(proxy_link, &msg); +} + +void proxy_default_bar_write(PCIProxyDev *dev, MemoryRegion *mr, hwaddr addr, + uint64_t val, unsigned size, bool memory) +{ + send_bar_access_msg(dev->proxy_link, mr, true, addr, &val, size, memory); +} diff --git a/include/hw/proxy/qemu-proxy.h b/include/hw/proxy/qemu-proxy.h index 0b0d94a..567a7c6 100644 --- a/include/hw/proxy/qemu-proxy.h +++ b/include/hw/proxy/qemu-proxy.h @@ -65,4 +65,7 @@ typedef struct PCIProxyDevClass { char *command; } PCIProxyDevClass; +void proxy_default_bar_write(PCIProxyDev *dev, MemoryRegion *mr, hwaddr addr, + uint64_t val, unsigned size, bool memory); + #endif /* QEMU_PROXY_H */ diff --git a/include/io/proxy-link.h b/include/io/proxy-link.h index 521df4f..2884852 100644 --- a/include/io/proxy-link.h +++ b/include/io/proxy-link.h @@ -56,6 +56,7 @@ typedef struct ProxyLinkState ProxyLinkState; * CONF_READ PCI config. space read * CONF_WRITE PCI config. space write * SYNC_SYSMEM Shares QEMU's RAM with remote device's RAM + * BAR_WRITE Writes to PCI BAR region * */ typedef enum { @@ -63,6 +64,7 @@ typedef enum { CONF_READ, CONF_WRITE, SYNC_SYSMEM, + BAR_WRITE, MAX, } proc_cmd_t; @@ -85,6 +87,13 @@ typedef struct { } sync_sysmem_msg_t; typedef struct { + hwaddr addr; + uint64_t val; + unsigned size; + bool memory; +} bar_access_msg_t; + +typedef struct { proc_cmd_t cmd; int bytestream; size_t size; @@ -92,6 +101,7 @@ typedef struct { union { uint64_t u64; sync_sysmem_msg_t sync_sysmem; + bar_access_msg_t bar_access; } data1; int fds[REMOTE_MAX_FDS]; diff --git a/remote/remote-main.c b/remote/remote-main.c index f708be2..cf7949c 100644 --- a/remote/remote-main.c +++ b/remote/remote-main.c @@ -45,6 +45,7 @@ #include "qemu/config-file.h" #include "sysemu/sysemu.h" #include "block/block.h" +#include "exec/memattrs.h" static ProxyLinkState *proxy_link; PCIDevice *remote_pci_dev; @@ -75,6 +76,23 @@ static void process_config_read(ProcMsg *msg) PUT_REMOTE_WAIT(wait); } +/* TODO: confirm memtx attrs. */ +static void process_bar_write(ProcMsg *msg, Error **errp) +{ + bar_access_msg_t *bar_access = &msg->data1.bar_access; + AddressSpace *as = + bar_access->memory ? &address_space_memory : &address_space_io; + MemTxResult res; + + res = address_space_rw(as, bar_access->addr, MEMTXATTRS_UNSPECIFIED, + (uint8_t *)&bar_access->val, bar_access->size, true); + + if (res != MEMTX_OK) { + error_setg(errp, "Could not perform address space write operation," + " inaccessible address: %lx.", bar_access->addr); + } +} + static void process_msg(GIOCondition cond) { ProcMsg *msg = NULL; @@ -101,6 +119,12 @@ static void process_msg(GIOCondition cond) case CONF_READ: process_config_read(msg); break; + case BAR_WRITE: + process_bar_write(msg, &err); + if (err) { + goto finalize_loop; + } + break; default: error_setg(&err, "Unknown command"); goto finalize_loop;