journalctl --boot --dmesg | grep sof
Apr 04 22:17:22 ubuntu kernel: software IO TLB: area num 16.
Apr 04 22:17:22 ubuntu kernel: PCI-DMA: Using software bounce buffering for IO (SWIOTLB)
Apr 04 22:17:22 ubuntu kernel: software IO TLB: mapped [mem 0x00000000af170000-0x00000000b3170000] (64MB)
Apr 04 22:17:22 ubuntu kernel: integrity: Loaded X.509 cert 'Microsoft Windows Production PCA 2011: a92902398e16c49778cd90f99e4f9ae17c55af53'
Apr 04 22:17:22 ubuntu kernel: integrity: Loaded X.509 cert 'Microsoft Corporation UEFI CA 2011: 13adbf4309bd82709c8cd54f316ed522988a1bd4'