On Wed, Dec 18, 2019 at 9:03 AM Ard Biesheuvel <ardb@xxxxxxxxxx> wrote:
> + status = efi_call_early(create_event, EVT_SIGNAL_EXIT_BOOT_SERVICES,
> + TPL_CALLBACK, handle_exit_boot_services_event,
> + NULL, &exit_boot_services_event);
> + if (status != EFI_SUCCESS) {
> + pr_efi_err("Failed to register for EBS() event\n");
> + goto free_handle;
> + }
OVMF's SEV implementation appears to tear down AMD's IOMMU mappings at
EVT_SIGNAL_EXIT_BOOT_SERVICES. How are we ensuring that this happens
first?
