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Fri, 31 Jul 2020 18:21:05 +0000 Received: from abhmp0005.oracle.com (abhmp0005.oracle.com [141.146.116.11]) by userv0122.oracle.com (8.14.4/8.14.4) with ESMTP id 06VIL3Mc020342; Fri, 31 Jul 2020 18:21:03 GMT Received: from jaraman-bur-1.us.oracle.com (/10.152.33.39) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Fri, 31 Jul 2020 11:21:02 -0700 From: Jagannathan Raman To: qemu-devel@nongnu.org Subject: [PATCH v8 18/20] multi-process: perform device reset in the remote process Date: Fri, 31 Jul 2020 14:20:25 -0400 Message-Id: <32f1eb26cd13e376cb6b8603639ea66d78a92134.1596217462.git.jag.raman@oracle.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: References: In-Reply-To: References: X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9699 signatures=668679 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=3 malwarescore=0 mlxscore=0 adultscore=0 spamscore=0 phishscore=0 mlxlogscore=999 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2006250000 definitions=main-2007310137 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9699 signatures=668679 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 adultscore=0 clxscore=1015 malwarescore=0 spamscore=0 suspectscore=3 bulkscore=0 priorityscore=1501 phishscore=0 mlxlogscore=999 lowpriorityscore=0 impostorscore=0 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2006250000 definitions=main-2007310136 Received-SPF: pass client-ip=156.151.31.86; envelope-from=jag.raman@oracle.com; helo=userp2130.oracle.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/07/31 12:51:59 X-ACL-Warn: Detected OS = Linux 3.1-3.10 [fuzzy] X-Spam_score_int: -63 X-Spam_score: -6.4 X-Spam_bar: ------ X-Spam_report: (-6.4 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_MSPIKE_H2=-1, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001, UNPARSEABLE_RELAY=0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: elena.ufimtseva@oracle.com, fam@euphon.net, swapnil.ingle@nutanix.com, john.g.johnson@oracle.com, kraxel@redhat.com, jag.raman@oracle.com, quintela@redhat.com, mst@redhat.com, armbru@redhat.com, kanth.ghatraju@oracle.com, felipe@nutanix.com, thuth@redhat.com, ehabkost@redhat.com, konrad.wilk@oracle.com, dgilbert@redhat.com, alex.williamson@redhat.com, stefanha@redhat.com, thanos.makatos@nutanix.com, rth@twiddle.net, kwolf@redhat.com, berrange@redhat.com, mreitz@redhat.com, ross.lagerwall@citrix.com, marcandre.lureau@gmail.com, pbonzini@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" From: Elena Ufimtseva Perform device reset in the remote process when QEMU performs device reset. This is required to reset the internal state (like registers, etc...) of emulated devices Signed-off-by: Elena Ufimtseva Signed-off-by: John G Johnson Signed-off-by: Jagannathan Raman --- hw/i386/remote-msg.c | 22 ++++++++++++++++++++++ hw/pci/proxy.c | 20 ++++++++++++++++++++ include/io/mpqemu-link.h | 1 + 3 files changed, 43 insertions(+) diff --git a/hw/i386/remote-msg.c b/hw/i386/remote-msg.c index 2a4d7f1..55db631 100644 --- a/hw/i386/remote-msg.c +++ b/hw/i386/remote-msg.c @@ -19,6 +19,7 @@ #include "exec/memattrs.h" #include "hw/i386/remote-memory.h" #include "hw/remote/iohub.h" +#include "sysemu/reset.h" static void process_config_write(QIOChannel *ioc, PCIDevice *dev, MPQemuMsg *msg); @@ -27,6 +28,8 @@ static void process_config_read(QIOChannel *ioc, PCIDevice *dev, static void process_bar_write(QIOChannel *ioc, MPQemuMsg *msg, Error **errp); static void process_bar_read(QIOChannel *ioc, MPQemuMsg *msg, Error **errp); static void process_proxy_ping_msg(QIOChannel *ioc, Error **errp); +static void process_device_reset_msg(QIOChannel *ioc, PCIDevice *dev, + Error **errp); gboolean mpqemu_process_msg(QIOChannel *ioc, GIOCondition cond, gpointer opaque) @@ -79,6 +82,9 @@ gboolean mpqemu_process_msg(QIOChannel *ioc, GIOCondition cond, case PROXY_PING: process_proxy_ping_msg(ioc, &local_err); break; + case DEVICE_RESET: + process_device_reset_msg(ioc, pci_dev, &local_err); + break; default: error_setg(&local_err, "Unknown command (%d) received for device %s (pid=%d)", @@ -242,3 +248,19 @@ static void process_proxy_ping_msg(QIOChannel *ioc, Error **errp) "in remote process pid=%d", getpid()); } } + +static void process_device_reset_msg(QIOChannel *ioc, PCIDevice *dev, + Error **errp) +{ + DeviceClass *dc = DEVICE_GET_CLASS(dev); + DeviceState *s = DEVICE(dev); + MPQemuMsg ret = { 0 }; + + if (dc->reset) { + dc->reset(s); + } + + ret.cmd = RET_MSG; + + mpqemu_msg_send(&ret, ioc, errp); +} diff --git a/hw/pci/proxy.c b/hw/pci/proxy.c index 490093c..b6cc3fc 100644 --- a/hw/pci/proxy.c +++ b/hw/pci/proxy.c @@ -26,6 +26,7 @@ static void probe_pci_info(PCIDevice *dev, Error **errp); static void start_hb_timer(PCIProxyDev *dev); static void stop_hb_timer(PCIProxyDev *dev); +static void proxy_device_reset(DeviceState *dev); static void proxy_set_socket(PCIProxyDev *pdev, int fd, Error **errp) { @@ -191,6 +192,8 @@ static void pci_proxy_dev_class_init(ObjectClass *klass, void *data) k->config_read = pci_proxy_read_config; k->config_write = pci_proxy_write_config; + dc->reset = proxy_device_reset; + device_class_set_props(dc, proxy_properties); } @@ -395,3 +398,20 @@ static void stop_hb_timer(PCIProxyDev *dev) timer_del(dev->hb_timer); timer_free(dev->hb_timer); } + +static void proxy_device_reset(DeviceState *dev) +{ + PCIProxyDev *pdev = PCI_PROXY_DEV(dev); + MPQemuMsg msg = { 0 }; + Error *local_err = NULL; + + msg.bytestream = 0; + msg.size = sizeof(msg.data1); + msg.cmd = DEVICE_RESET; + + (void)mpqemu_msg_send_and_await_reply(&msg, pdev->ioc, &local_err); + if (local_err) { + error_report("Failed to send DEVICE_RESET to the remote process"); + } + +} diff --git a/include/io/mpqemu-link.h b/include/io/mpqemu-link.h index 5f2913f..28c68cb 100644 --- a/include/io/mpqemu-link.h +++ b/include/io/mpqemu-link.h @@ -41,6 +41,7 @@ typedef enum { SET_IRQFD, GET_PCI_INFO, PROXY_PING, + DEVICE_RESET, MAX = INT_MAX, } MPQemuCmd; -- 1.8.3.1