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Fri, 31 Jul 2020 18:20:53 +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 06VIKpNd020186; Fri, 31 Jul 2020 18:20:51 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 11:20:51 -0700 From: Jagannathan Raman To: qemu-devel@nongnu.org Subject: [PATCH v8 10/20] multi-process: setup memory manager for remote device Date: Fri, 31 Jul 2020 14:20:17 -0400 Message-Id: <2bebe51b049f2f6583c5227fc12a60c63229a2f6.1596217462.git.jag.raman@oracle.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: References: In-Reply-To: References: MIME-Version: 1.0 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-2007310137 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+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" SyncSysMemMsg message format is defined. It is used to send file descriptors of the RAM regions to remote device. RAM on the remote device is configured with a set of file descriptors. Old RAM regions are deleted and new regions, each with an fd, is added to the RAM. Signed-off-by: Jagannathan Raman Signed-off-by: John G Johnson Signed-off-by: Elena Ufimtseva --- MAINTAINERS | 2 ++ hw/i386/Makefile.objs | 1 + hw/i386/remote-memory.c | 58 +++++++++++++++++++++++++++++++++++++++++ include/hw/i386/remote-memory.h | 19 ++++++++++++++ include/io/mpqemu-link.h | 13 +++++++++ io/mpqemu-link.c | 13 +++++++++ 6 files changed, 106 insertions(+) create mode 100644 hw/i386/remote-memory.c create mode 100644 include/hw/i386/remote-memory.h diff --git a/MAINTAINERS b/MAINTAINERS index 9fd278f..2da7680 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -3049,6 +3049,8 @@ F: include/io/mpqemu-link.h F: hw/i386/remote-msg.c F: include/hw/i386/remote-obj.h F: hw/i386/remote-obj.c +F: include/hw/i386/remote-memory.h +F: hw/i386/remote-memory.c Build and test automation ------------------------- diff --git a/hw/i386/Makefile.objs b/hw/i386/Makefile.objs index 30d7102..4ba47e0 100644 --- a/hw/i386/Makefile.objs +++ b/hw/i386/Makefile.objs @@ -17,6 +17,7 @@ obj-$(CONFIG_PC) += port92.o obj-$(CONFIG_MPQEMU) += remote.o obj-$(CONFIG_MPQEMU) += remote-msg.o obj-$(CONFIG_MPQEMU) += remote-obj.o +obj-$(CONFIG_MPQEMU) += remote-memory.o obj-y += kvmvapic.o obj-$(CONFIG_ACPI) += acpi-common.o diff --git a/hw/i386/remote-memory.c b/hw/i386/remote-memory.c new file mode 100644 index 0000000..759b8e9 --- /dev/null +++ b/hw/i386/remote-memory.c @@ -0,0 +1,58 @@ +/* + * Memory manager for remote device + * + * Copyright © 2018, 2020 Oracle and/or its affiliates. + * + * This work is licensed under the terms of the GNU GPL, version 2 or later. + * See the COPYING file in the top-level directory. + * + */ + +#include "qemu/osdep.h" +#include "qemu-common.h" + +#include "hw/i386/remote-memory.h" +#include "exec/address-spaces.h" +#include "exec/ram_addr.h" +#include "qapi/error.h" + +void remote_sysmem_reconfig(MPQemuMsg *msg, Error **errp) +{ + SyncSysmemMsg *sysmem_info = &msg->data1.sync_sysmem; + MemoryRegion *sysmem, *subregion, *next; + static unsigned int suffix; + Error *local_err = NULL; + char *name; + int region; + + sysmem = get_system_memory(); + + memory_region_transaction_begin(); + + QTAILQ_FOREACH_SAFE(subregion, &sysmem->subregions, subregions_link, next) { + if (subregion->ram) { + memory_region_del_subregion(sysmem, subregion); + object_unparent(OBJECT(subregion)); + } + } + + for (region = 0; region < msg->num_fds; region++) { + subregion = g_new(MemoryRegion, 1); + name = g_strdup_printf("remote-mem-%u", suffix++); + memory_region_init_ram_from_fd(subregion, NULL, + name, sysmem_info->sizes[region], + RAM_SHARED, msg->fds[region], + sysmem_info->offsets[region], + &local_err); + g_free(name); + if (local_err) { + error_propagate(errp, local_err); + break; + } + + memory_region_add_subregion(sysmem, sysmem_info->gpas[region], + subregion); + } + + memory_region_transaction_commit(); +} diff --git a/include/hw/i386/remote-memory.h b/include/hw/i386/remote-memory.h new file mode 100644 index 0000000..aab3e4d --- /dev/null +++ b/include/hw/i386/remote-memory.h @@ -0,0 +1,19 @@ +/* + * Memory manager for remote device + * + * Copyright © 2018, 2020 Oracle and/or its affiliates. + * + * This work is licensed under the terms of the GNU GPL, version 2 or later. + * See the COPYING file in the top-level directory. + * + */ + +#ifndef REMOTE_MEMORY_H +#define REMOTE_MEMORY_H + +#include "exec/hwaddr.h" +#include "io/mpqemu-link.h" + +void remote_sysmem_reconfig(MPQemuMsg *msg, Error **errp); + +#endif diff --git a/include/io/mpqemu-link.h b/include/io/mpqemu-link.h index 8591ad2..98383f9 100644 --- a/include/io/mpqemu-link.h +++ b/include/io/mpqemu-link.h @@ -15,6 +15,8 @@ #include "qemu/thread.h" #include "io/channel.h" #include "io/channel-socket.h" +#include "exec/cpu-common.h" +#include "exec/hwaddr.h" #define REMOTE_MAX_FDS 8 @@ -25,13 +27,22 @@ * * MPQemuCmd enum type to specify the command to be executed on the remote * device. + * + * SYNC_SYSMEM Shares QEMU's RAM with remote device's RAM */ typedef enum { INIT = 0, + SYNC_SYSMEM, RET_MSG, MAX = INT_MAX, } MPQemuCmd; +typedef struct { + hwaddr gpas[REMOTE_MAX_FDS]; + uint64_t sizes[REMOTE_MAX_FDS]; + off_t offsets[REMOTE_MAX_FDS]; +} SyncSysmemMsg; + /** * Maximum size of data2 field in the message to be transmitted. */ @@ -50,6 +61,7 @@ typedef enum { * MPQemuMsg Format of the message sent to the remote device from QEMU. * */ + typedef struct { int cmd; int bytestream; @@ -57,6 +69,7 @@ typedef struct { union { uint64_t u64; + SyncSysmemMsg sync_sysmem; } data1; int fds[REMOTE_MAX_FDS]; diff --git a/io/mpqemu-link.c b/io/mpqemu-link.c index d4dd0fe..aad1d77 100644 --- a/io/mpqemu-link.c +++ b/io/mpqemu-link.c @@ -245,6 +245,19 @@ bool mpqemu_msg_valid(MPQemuMsg *msg) } } } + /* Verify message specific fields. */ + switch (msg->cmd) { + case SYNC_SYSMEM: + if (msg->num_fds == 0 || msg->bytestream) { + return false; + } + if (msg->size != sizeof(msg->data1)) { + return false; + } + break; + default: + break; + } return true; }