Signed-off-by: Lei Li <li...@linux.vnet.ibm.com>
---
qapi-schema.json | 20 ++++++++++++++++++++
qemu-char.c | 19 +++++++++++++++++++
qmp-commands.hx | 29 +++++++++++++++++++++++++++++
3 files changed, 68 insertions(+), 0 deletions(-)
diff --git a/qapi-schema.json b/qapi-schema.json
index bc55ed2..3c8530f 100644
--- a/qapi-schema.json
+++ b/qapi-schema.json
@@ -206,6 +206,26 @@
{ 'command': 'query-chardev', 'returns': ['ChardevInfo'] }
##
+# @memchar_write:
+#
+# Provide writing interface for memchardev. Write data to memchar
+# char device.
+#
+# @chardev: the name of the memchar char device.
+#
+# @size: the size to write in bytes.
+#
+# @data: the source data write to memchar.
+#
+# Returns: Nothing on success
+# If an I/O error occurs while writing, IOError
+#
+# Since: 1.2
+##
+{ 'command': 'memchar_write',
+ 'data': {'chardev': 'str', 'size': 'int', 'data': 'str'} }
+
+##
# @CommandInfo:
#
# Information about a QMP command
diff --git a/qemu-char.c b/qemu-char.c
index 087c92d..1012e65 100644
--- a/qemu-char.c
+++ b/qemu-char.c
@@ -2636,6 +2636,25 @@ size_t qemu_chr_mem_osize(const CharDriverState *chr)
return d->cbuf_count;
}
+void qmp_memchar_write(const char *chardev, int64_t size,
+ uint8_t *data, Error **errp)
+{
+ CharDriverState *chr;
+ int ret;
+
+ chr = qemu_chr_find(chardev);
+
+ if(!chr) {
+ qemu_chr_init_mem(chr, size);
+ }
+
+ ret = mem_chr_write(chr, data, size);
+ if (ret <= 0) {
+ error_set(errp, QERR_IO_ERROR);
+ return;
+ }
+}
+
QemuOpts *qemu_chr_parse_compat(const char *label, const char *filename)
{
char host[65], port[33], width[8], height[8];
diff --git a/qmp-commands.hx b/qmp-commands.hx
index e3cf3c5..182f1e6 100644
--- a/qmp-commands.hx
+++ b/qmp-commands.hx
@@ -441,6 +441,35 @@ Note: inject-nmi is only supported for x86 guest
currently, it will
EQMP
{
+ .name = "memchar_write",
+ .args_type = "chardev:s,size:i,data:s",
+ .mhandler.cmd_new = qmp_marshal_input_memchar_write,
+ },
+
+SQMP
+memchar_write
+-------------
+
+Provide writing interface for memchardev. Write data to memchar
+char device.
+
+Arguments:
+
+- "chardev": the name of the char device, must be unique (json-string)
+- "size": the memory size, in bytes (json-int)
+- "data": the source data writed to memchar (json-string)
+
+Example:
+
+-> { "execute": "memchar_write",
+ "arguments": { "chardev": foo,
+ "size": 1000,
+ "data": "data string" } }
+<- { "return": {} }
+
+EQMP
+
+ {
.name = "xen-save-devices-state",
.args_type = "filename:F",
.mhandler.cmd_new = qmp_marshal_input_xen_save_devices_state,
--
1.7.7.6
