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[PATCH v8 08/20] multi-process: Initialize message handler in remote dev
From: |
Jagannathan Raman |
Subject: |
[PATCH v8 08/20] multi-process: Initialize message handler in remote device |
Date: |
Fri, 31 Jul 2020 14:20:15 -0400 |
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.ufimtseva@oracle.com>
Signed-off-by: John G Johnson <john.g.johnson@oracle.com>
Signed-off-by: Jagannathan Raman <jag.raman@oracle.com>
---
MAINTAINERS | 1 +
hw/i386/Makefile.objs | 1 +
hw/i386/remote-msg.c | 64 ++++++++++++++++++++++++++++++++++++++++++++++++
include/hw/i386/remote.h | 4 +++
4 files changed, 70 insertions(+)
create mode 100644 hw/i386/remote-msg.c
diff --git a/MAINTAINERS b/MAINTAINERS
index 41fe809..40e0654 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -3046,6 +3046,7 @@ 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/Makefile.objs b/hw/i386/Makefile.objs
index 5ead266..8396958 100644
--- a/hw/i386/Makefile.objs
+++ b/hw/i386/Makefile.objs
@@ -15,6 +15,7 @@ obj-$(CONFIG_VMPORT) += vmport.o
obj-$(CONFIG_VMMOUSE) += vmmouse.o
obj-$(CONFIG_PC) += port92.o
obj-$(CONFIG_MPQEMU) += remote.o
+obj-$(CONFIG_MPQEMU) += remote-msg.o
obj-y += kvmvapic.o
obj-$(CONFIG_ACPI) += acpi-common.o
diff --git a/hw/i386/remote-msg.c b/hw/i386/remote-msg.c
new file mode 100644
index 0000000..4315d2c
--- /dev/null
+++ b/hw/i386/remote-msg.c
@@ -0,0 +1,64 @@
+/*
+ * 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 };
+
+ 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;
+ }
+
+ mpqemu_msg_recv(&msg, 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)",
+ msg.cmd, DEVICE(pci_dev)->id, getpid());
+ }
+
+ mpqemu_msg_cleanup(&msg);
+
+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 5b36b25..7f9028f 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
--
1.8.3.1
- [PATCH v8 00/20] Initial support for multi-process qemu, Jagannathan Raman, 2020/07/31
- [PATCH v8 02/20] multi-process: Add config option for multi-process QEMU, Jagannathan Raman, 2020/07/31
- [PATCH v8 01/20] memory: alloc RAM from file at offset, Jagannathan Raman, 2020/07/31
- [PATCH v8 05/20] multi-process: add qio channel function to transmit, Jagannathan Raman, 2020/07/31
- [PATCH v8 07/20] multi-process: add co-routines to communicate with remote, Jagannathan Raman, 2020/07/31
- [PATCH v8 08/20] multi-process: Initialize message handler in remote device,
Jagannathan Raman <=
- [PATCH v8 03/20] multi-process: setup PCI host bridge for remote device, Jagannathan Raman, 2020/07/31
- [PATCH v8 09/20] multi-process: Associate fd of a PCIDevice with its object, Jagannathan Raman, 2020/07/31
- [PATCH v8 04/20] multi-process: setup a machine object for remote device process, Jagannathan Raman, 2020/07/31
- [PATCH v8 11/20] multi-process: introduce proxy object, Jagannathan Raman, 2020/07/31
- [PATCH v8 13/20] multi-process: PCI BAR read/write handling for proxy & remote endpoints, Jagannathan Raman, 2020/07/31
- [PATCH v8 14/20] multi-process: Synchronize remote memory, Jagannathan Raman, 2020/07/31
- [PATCH v8 15/20] multi-process: create IOHUB object to handle irq, Jagannathan Raman, 2020/07/31
- [PATCH v8 16/20] multi-process: Retrieve PCI info from remote process, Jagannathan Raman, 2020/07/31
- [PATCH v8 18/20] multi-process: perform device reset in the remote process, Jagannathan Raman, 2020/07/31
- [PATCH v8 20/20] multi-process: add configure and usage information, Jagannathan Raman, 2020/07/31