diff options
Diffstat (limited to 'blockdev.c')
| -rw-r--r-- | blockdev.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/blockdev.c b/blockdev.c index b307ed9ba9..0e67d06330 100644 --- a/blockdev.c +++ b/blockdev.c @@ -391,6 +391,13 @@ DriveInfo *drive_init(QemuOpts *opts, BlockInterfaceType block_default_type) } } + if ((buf = qemu_opt_get(opts, "discard")) != NULL) { + if (bdrv_parse_discard_flags(buf, &bdrv_flags) != 0) { + error_report("invalid discard option"); + return NULL; + } + } + bdrv_flags |= BDRV_O_CACHE_WB; if ((buf = qemu_opt_get(opts, "cache")) != NULL) { if (bdrv_parse_cache_flags(buf, &bdrv_flags) != 0) { @@ -1501,6 +1508,10 @@ QemuOptsList qemu_drive_opts = { .type = QEMU_OPT_STRING, .help = "disk image", },{ + .name = "discard", + .type = QEMU_OPT_STRING, + .help = "discard operation (ignore/off, unmap/on)", + },{ .name = "cache", .type = QEMU_OPT_STRING, .help = "host cache usage (none, writeback, writethrough, " |