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Reviewed-by: Yi Liu Reviewed-by: Zhenzhong Duan Reviewed-by: C=C3=A9dric Le Goater Reviewed-by: Philippe Mathieu-Daud=C3=A9 Signed-off-by: Pierrick Bouvier --- hw/vfio/iommufd.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/hw/vfio/iommufd.c b/hw/vfio/iommufd.c index 131612eb836..3e33dfbb356 100644 --- a/hw/vfio/iommufd.c +++ b/hw/vfio/iommufd.c @@ -274,7 +274,10 @@ static int iommufd_cdev_getfd(const char *sysfs_path, = Error **errp) } =20 if (!g_file_get_contents(vfio_dev_path, &contents, &length, NULL)) { - error_setg(errp, "failed to load \"%s\"", vfio_dev_path); + error_setg(errp, + "failed to load \"%s\"" + " (is your kernel config missing CONFIG_VFIO_DEVICE_CDE= V?)", + vfio_dev_path); goto out_close_dir; } =20 --=20 2.47.3