From: Jagannathan Raman <jag.ra...@oracle.com>
Initializes the message handler function in the remote process. It is
called whenever there's an event pending on QIOChannel that registers
this function.
Signed-off-by: Elena Ufimtseva <elena.ufimts...@oracle.com>
Signed-off-by: John G Johnson <john.g.john...@oracle.com>
Signed-off-by: Jagannathan Raman <jag.ra...@oracle.com>
---
MAINTAINERS | 1 +
hw/i386/meson.build | 1 +
hw/i386/remote-msg.c | 66 ++++++++++++++++++++++++++++++++++++++++
include/hw/i386/remote.h | 4 +++
4 files changed, 72 insertions(+)
create mode 100644 hw/i386/remote-msg.c
diff --git a/MAINTAINERS b/MAINTAINERS
index 1ca1f8ccff..9885c9499f 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -3047,6 +3047,7 @@ F: hw/i386/remote.c
F: include/hw/i386/remote.h
F: io/mpqemu-link.c
F: include/io/mpqemu-link.h
+F: hw/i386/remote-msg.c
Build and test automation
-------------------------
diff --git a/hw/i386/meson.build b/hw/i386/meson.build
index 1c1668c5db..238ae0879d 100644
--- a/hw/i386/meson.build
+++ b/hw/i386/meson.build
@@ -24,6 +24,7 @@ i386_ss.add(when: 'CONFIG_PC', if_true: files(
'acpi-build.c',
'port92.c'))
i386_ss.add(when: 'CONFIG_MPQEMU', if_true: files('remote.c'))
+i386_ss.add(when: 'CONFIG_MPQEMU', if_true: files('remote-msg.c'))
subdir('kvm')
subdir('xen')
diff --git a/hw/i386/remote-msg.c b/hw/i386/remote-msg.c
new file mode 100644
index 0000000000..2a855d5850
--- /dev/null
+++ b/hw/i386/remote-msg.c
@@ -0,0 +1,66 @@
+/*
+ * Copyright © 2020 Oracle and/or its affiliates.
+ *
+ * This work is licensed under the terms of the GNU GPL-v2, 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.h"
+#include "io/channel.h"
+#include "io/mpqemu-link.h"
+#include "qapi/error.h"
+#include "sysemu/runstate.h"
+
+gboolean mpqemu_process_msg(QIOChannel *ioc, GIOCondition cond,
+ gpointer opaque)
+{
+ PCIDevice *pci_dev = (PCIDevice *)opaque;
+ Error *local_err = NULL;
+ MPQemuMsg msg = { 0 };
+ MPQemuRequest req = { 0 };
+
+ if (cond & G_IO_HUP) {
+ qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN);
+ return FALSE;
+ }
+
+ if (cond & (G_IO_ERR | G_IO_NVAL)) {
+ error_report("Error %d while processing message from proxy"
+ "in remote process pid=%d", errno, getpid());
+ return FALSE;
+ }
+
+ req.msg = &msg;
+ req.ioc = ioc;
+
+ mpqemu_msg_recv_in_co(&req, ioc, &local_err);
+ if (local_err) {
+ goto exit;
+ }
+
+ if (!mpqemu_msg_valid(&msg)) {
+ error_report("Received invalid message from proxy"
+ "in remote process pid=%d", getpid());
+ return FALSE;
+ }
+
+ switch (msg.cmd) {
+ default:
+ error_setg(&local_err,
+ "Unknown command (%d) received for device %s (pid=%d)",
+ req.msg->cmd, DEVICE(pci_dev)->id, getpid());
+ }
+
+exit:
+ if (local_err) {
+ error_report_err(local_err);
+ return FALSE;
+ }
+
+ return TRUE;
+}
diff --git a/include/hw/i386/remote.h b/include/hw/i386/remote.h
index 5b36b25ca1..7f9028fcce 100644
--- a/include/hw/i386/remote.h
+++ b/include/hw/i386/remote.h
@@ -14,6 +14,7 @@
#include "qom/object.h"
#include "hw/boards.h"
#include "hw/pci-host/remote.h"
+#include "io/channel.h"
typedef struct RemoteMachineState {
MachineState parent_obj;
@@ -25,4 +26,7 @@ typedef struct RemoteMachineState {
#define REMOTE_MACHINE(obj) \
OBJECT_CHECK(RemoteMachineState, (obj), TYPE_REMOTE_MACHINE)
+gboolean mpqemu_process_msg(QIOChannel *ioc, GIOCondition cond,
+ gpointer opaque);
+
#endif
--
2.25.GIT
