diff options
| -rw-r--r-- | hw/vfio/cpr-iommufd.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/hw/vfio/cpr-iommufd.c b/hw/vfio/cpr-iommufd.c index a72b68daa8..148a06d552 100644 --- a/hw/vfio/cpr-iommufd.c +++ b/hw/vfio/cpr-iommufd.c @@ -5,6 +5,7 @@ */ #include "qemu/osdep.h" +#include "qemu/error-report.h" #include "qapi/error.h" #include "hw/vfio/vfio-cpr.h" #include "hw/vfio/vfio-device.h" @@ -112,10 +113,40 @@ static bool vfio_cpr_supported(IOMMUFDBackend *be, Error **errp) return true; } +static int iommufd_cpr_pre_save(void *opaque) +{ + IOMMUFDBackend *be = opaque; + + /* + * The process has not changed yet, but proactively try the ioctl, + * and it will fail if any DMA mappings are not supported. + */ + if (!iommufd_change_process_capable(be)) { + error_report("some memory regions do not support " + "IOMMU_IOAS_CHANGE_PROCESS"); + return -1; + } + return 0; +} + +static int iommufd_cpr_post_load(void *opaque, int version_id) +{ + IOMMUFDBackend *be = opaque; + Error *local_err = NULL; + + if (!iommufd_change_process(be, &local_err)) { + error_report_err(local_err); + return -1; + } + return 0; +} + static const VMStateDescription iommufd_cpr_vmstate = { .name = "iommufd", .version_id = 0, .minimum_version_id = 0, + .pre_save = iommufd_cpr_pre_save, + .post_load = iommufd_cpr_post_load, .needed = cpr_incoming_needed, .fields = (VMStateField[]) { VMSTATE_END_OF_LIST() |