diff options
| -rw-r--r-- | migration/postcopy-ram.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/migration/postcopy-ram.c b/migration/postcopy-ram.c index 102fb61485..effbeb64fb 100644 --- a/migration/postcopy-ram.c +++ b/migration/postcopy-ram.c @@ -378,6 +378,10 @@ static int ram_block_enable_notify(const char *block_name, void *host_addr, error_report("%s userfault register: %s", __func__, strerror(errno)); return -1; } + if (!(reg_struct.ioctls & ((__u64)1 << _UFFDIO_COPY))) { + error_report("%s userfault: Region doesn't support COPY", __func__); + return -1; + } return 0; } |