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envelope-from=jag.raman@oracle.com; helo=userp2120.oracle.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/10/15 14:05:35 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+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" From: Elena Ufimtseva Signed-off-by: Elena Ufimtseva Signed-off-by: Jagannathan Raman Signed-off-by: John G Johnson Reviewed-by: Stefan Hajnoczi --- include/io/mpqemu-link.h | 4 ++++ io/mpqemu-link.c | 38 ++++++++++++++++++++++++++++++++++++++ 2 files changed, 42 insertions(+) diff --git a/include/io/mpqemu-link.h b/include/io/mpqemu-link.h index e33181a..4bea5da 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 "exec/hwaddr.h" +#include "io/channel-socket.h" +#include "hw/pci/proxy.h" #define REMOTE_MAX_FDS 8 @@ -65,6 +67,8 @@ typedef struct { int num_fds; } QEMU_PACKED MPQemuMsg; +uint64_t mpqemu_msg_send_and_await_reply(MPQemuMsg *msg, PCIProxyDev *pdev, + Error **errp); void mpqemu_msg_send(MPQemuMsg *msg, QIOChannel *ioc, Error **errp); void mpqemu_msg_recv(MPQemuMsg *msg, QIOChannel *ioc, Error **errp); diff --git a/io/mpqemu-link.c b/io/mpqemu-link.c index b30e27c..1339cc7 100644 --- a/io/mpqemu-link.c +++ b/io/mpqemu-link.c @@ -17,6 +17,7 @@ #include "qemu/iov.h" #include "qemu/error-report.h" #include "qemu/main-loop.h" +#include "io/channel.h" /* * Send message over the ioc QIOChannel. @@ -214,6 +215,43 @@ fail: } } +/* + * Called from VCPU thread in non-coroutine context. + */ +uint64_t mpqemu_msg_send_and_await_reply(MPQemuMsg *msg, PCIProxyDev *pdev, + Error **errp) +{ + MPQemuMsg msg_reply = {0}; + uint64_t ret = UINT64_MAX; + Error *local_err = NULL; + + qemu_mutex_lock(&pdev->io_mutex); + mpqemu_msg_send(msg, pdev->ioc, &local_err); + if (local_err) { + error_propagate(errp, local_err); + goto exit_send; + } + + mpqemu_msg_recv(&msg_reply, pdev->ioc, &local_err); + if (local_err) { + error_propagate(errp, local_err); + goto exit_send; + } + + if (!mpqemu_msg_valid(&msg_reply) || msg_reply.cmd != RET_MSG) { + error_setg(errp, "ERROR: Invalid reply received for command %d", + msg->cmd); + goto exit_send; + } else { + ret = msg_reply.data.u64; + } + + exit_send: + qemu_mutex_unlock(&pdev->io_mutex); + + return ret; +} + bool mpqemu_msg_valid(MPQemuMsg *msg) { if (msg->cmd >= MPQEMU_CMD_MAX && msg->cmd < 0) {