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helo=lists.gnu.org; Received-SPF: pass client-ip=141.146.126.78; envelope-from=jag.raman@oracle.com; helo=aserp2120.oracle.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/10/15 14:05:33 X-ACL-Warn: Detected OS = Linux 3.1-3.10 [fuzzy] X-Spam_score_int: -43 X-Spam_score: -4.4 X-Spam_bar: ---- X-Spam_report: (-4.4 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, 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=-0.001, 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+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) 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 Reviewed-by: Stefan Hajnoczi --- MAINTAINERS | 2 ++ hw/i386/meson.build | 1 + hw/i386/remote-memory.c | 58 +++++++++++++++++++++++++++++++++++++= ++++ include/hw/i386/remote-memory.h | 19 ++++++++++++++ include/io/mpqemu-link.h | 13 +++++++++ io/mpqemu-link.c | 11 ++++++++ 6 files changed, 104 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 487ab13..4aa00ec 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -3109,6 +3109,8 @@ 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 =20 Build and test automation ------------------------- diff --git a/hw/i386/meson.build b/hw/i386/meson.build index 9735f6b..b698b36 100644 --- a/hw/i386/meson.build +++ b/hw/i386/meson.build @@ -27,6 +27,7 @@ i386_ss.add(when: 'CONFIG_PC', if_true: files( i386_ss.add(when: 'CONFIG_MPQEMU', if_true: files('remote.c')) i386_ss.add(when: 'CONFIG_MPQEMU', if_true: files('remote-msg.c')) i386_ss.add(when: 'CONFIG_MPQEMU', if_true: files('remote-obj.c')) +i386_ss.add(when: 'CONFIG_MPQEMU', if_true: files('remote-memory.c')) =20 subdir('kvm') subdir('xen') diff --git a/hw/i386/remote-memory.c b/hw/i386/remote-memory.c new file mode 100644 index 0000000..27bc8a7 --- /dev/null +++ b/hw/i386/remote-memory.c @@ -0,0 +1,58 @@ +/* + * Memory manager for remote device + * + * Copyright =C2=A9 2018, 2020 Oracle and/or its affiliates. + * + * This work is licensed under the terms of the GNU GPL, version 2 or late= r. + * 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 =3D &msg->data.sync_sysmem; + MemoryRegion *sysmem, *subregion, *next; + static unsigned int suffix; + Error *local_err =3D NULL; + char *name; + int region; + + sysmem =3D get_system_memory(); + + memory_region_transaction_begin(); + + QTAILQ_FOREACH_SAFE(subregion, &sysmem->subregions, subregions_link, n= ext) { + if (subregion->ram) { + memory_region_del_subregion(sysmem, subregion); + object_unparent(OBJECT(subregion)); + } + } + + for (region =3D 0; region < msg->num_fds; region++) { + subregion =3D g_new(MemoryRegion, 1); + name =3D 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-memor= y.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 =C2=A9 2018, 2020 Oracle and/or its affiliates. + * + * This work is licensed under the terms of the GNU GPL, version 2 or late= r. + * 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 3505e06..e33181a 100644 --- a/include/io/mpqemu-link.h +++ b/include/io/mpqemu-link.h @@ -14,6 +14,7 @@ #include "qom/object.h" #include "qemu/thread.h" #include "io/channel.h" +#include "exec/hwaddr.h" =20 #define REMOTE_MAX_FDS 8 =20 @@ -24,12 +25,22 @@ * * 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 { MPQEMU_CMD_INIT, + SYNC_SYSMEM, + RET_MSG, MPQEMU_CMD_MAX, } MPQemuCmd; =20 +typedef struct { + hwaddr gpas[REMOTE_MAX_FDS]; + uint64_t sizes[REMOTE_MAX_FDS]; + off_t offsets[REMOTE_MAX_FDS]; +} SyncSysmemMsg; + /** * MPQemuMsg: * @cmd: The remote command @@ -40,12 +51,14 @@ typedef enum { * MPQemuMsg Format of the message sent to the remote device from QEMU. * */ + typedef struct { int cmd; size_t size; =20 union { uint64_t u64; + SyncSysmemMsg sync_sysmem; } data; =20 int fds[REMOTE_MAX_FDS]; diff --git a/io/mpqemu-link.c b/io/mpqemu-link.c index d646aad..b30e27c 100644 --- a/io/mpqemu-link.c +++ b/io/mpqemu-link.c @@ -233,5 +233,16 @@ bool mpqemu_msg_valid(MPQemuMsg *msg) } } =20 + /* Verify message specific fields. */ + switch (msg->cmd) { + case SYNC_SYSMEM: + if (msg->num_fds =3D=3D 0 || msg->size !=3D sizeof(SyncSysmemMsg))= { + return false; + } + break; + default: + break; + } + return true; } --=20 1.8.3.1