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Diffstat (limited to 'hw/misc/bcm2835_property.c')
-rw-r--r--hw/misc/bcm2835_property.c13
1 files changed, 12 insertions, 1 deletions
diff --git a/hw/misc/bcm2835_property.c b/hw/misc/bcm2835_property.c
index de056ea2df..251b3d865d 100644
--- a/hw/misc/bcm2835_property.c
+++ b/hw/misc/bcm2835_property.c
@@ -282,7 +282,17 @@ static void bcm2835_property_mbox_push(BCM2835PropertyState *s, uint32_t value)
break;
case 0x00050001: /* Get command line */
- resplen = 0;
+ /*
+ * We follow the firmware behaviour: no NUL terminator is
+ * written to the buffer, and if the buffer is too short
+ * we report the required length in the response header
+ * and copy nothing to the buffer.
+ */
+ resplen = strlen(s->command_line);
+ if (bufsize >= resplen)
+ address_space_write(&s->dma_as, value + 12,
+ MEMTXATTRS_UNSPECIFIED, s->command_line,
+ resplen);
break;
default:
@@ -420,6 +430,7 @@ static void bcm2835_property_realize(DeviceState *dev, Error **errp)
static Property bcm2835_property_props[] = {
DEFINE_PROP_UINT32("board-rev", BCM2835PropertyState, board_rev, 0),
+ DEFINE_PROP_STRING("command-line", BCM2835PropertyState, command_line),
DEFINE_PROP_END_OF_LIST()
};